:root {
  --green: #16a34a;
  --green-dark: #0f7a4a;
  --green-soft: #e8f7ee;
  --blue: #1d4ed8;
  --blue-soft: #e8efff;
  --ink: #0f2a3d;
  --muted: #5b6b7a;
  --line: #dde6ee;
  --bg: #f5f9fc;
  --white: #ffffff;
  --wrong: #c2410c;
  --wrong-soft: #fff1e8;
  --radius: 16px;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  -webkit-tap-highlight-color: transparent;
}
.hidden { display: none !important; }

.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 12px;
  padding: calc(14px + env(safe-area-inset-top)) 18px 14px;
  background: linear-gradient(120deg, var(--green-dark), var(--blue));
  color: var(--white);
  box-shadow: 0 2px 12px rgba(15, 42, 61, .18);
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  display: grid; place-items: center;
  width: 40px; height: 40px; border-radius: 12px;
  background: rgba(255,255,255,.18); font-weight: 800; letter-spacing: .5px;
}
.topbar h1 { margin: 0; font-size: 1.15rem; }
.tagline { margin: 0; font-size: .78rem; opacity: .85; }
.icon-btn {
  border: 0; background: rgba(255,255,255,.18); color: var(--white);
  width: 38px; height: 38px; border-radius: 10px; font-size: 1.2rem; cursor: pointer;
}

main {
  max-width: 760px; margin: 0 auto;
  padding: 20px 16px calc(40px + env(safe-area-inset-bottom));
}

h2 { margin: 6px 0 4px; font-size: 1.35rem; }
.sub { margin: 0 0 18px; color: var(--muted); }

/* Home */
.hero {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; margin-bottom: 18px;
  display: flex; justify-content: space-between; gap: 16px; align-items: center;
}
.hero .stat { text-align: center; }
.hero .stat b { display: block; font-size: 1.5rem; color: var(--blue); }
.hero .stat span { font-size: .78rem; color: var(--muted); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; text-align: left; cursor: pointer; font: inherit; color: inherit;
  display: flex; flex-direction: column; gap: 8px;
  transition: transform .12s, box-shadow .12s, border-color .12s;
}
.card:hover, .card:focus-visible { transform: translateY(-2px); border-color: var(--green); box-shadow: 0 6px 18px rgba(22,163,74,.15); outline: none; }
.card .ico { font-size: 1.8rem; }
.card h3 { margin: 0; font-size: 1.02rem; }
.card p { margin: 0; color: var(--muted); font-size: .86rem; }
.card .meta { display: flex; justify-content: space-between; font-size: .8rem; color: var(--muted); margin-top: auto; padding-top: 6px; }
.badge { padding: 2px 8px; border-radius: 999px; background: var(--green-soft); color: var(--green-dark); font-weight: 600; }
.badge.blue { background: var(--blue-soft); color: var(--blue); }
.card.mock {
  grid-column: 1 / -1;
  background: linear-gradient(120deg, var(--green), var(--blue)); color: var(--white); border: 0;
}
.card.mock p, .card.mock .meta { color: rgba(255,255,255,.9); }
.card.mock .badge { background: rgba(255,255,255,.2); color: var(--white); }

.note { margin-top: 22px; font-size: .8rem; color: var(--muted); line-height: 1.5; }

/* Quiz */
.progress-wrap { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; font-size: .85rem; color: var(--muted); }
.progress { flex: 1; height: 8px; background: var(--line); border-radius: 999px; overflow: hidden; }
.progress > div { height: 100%; background: linear-gradient(90deg, var(--green), var(--blue)); transition: width .25s; }
.qcard { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.qsubject { font-size: .78rem; color: var(--blue); font-weight: 600; text-transform: uppercase; letter-spacing: .4px; }
.qtext { font-size: 1.12rem; line-height: 1.5; margin: 8px 0 18px; }
.choices { display: grid; gap: 10px; }
.choice {
  display: flex; gap: 12px; align-items: center; text-align: left;
  padding: 14px; border-radius: 12px; border: 2px solid var(--line); background: var(--white);
  font: inherit; color: inherit; cursor: pointer; transition: border-color .12s, background .12s;
}
.choice:hover:not(:disabled) { border-color: var(--blue); background: var(--blue-soft); }
.choice .letter {
  flex: none; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center;
  background: var(--blue-soft); color: var(--blue); font-weight: 700; font-size: .9rem;
}
.choice:disabled { cursor: default; }
.choice.correct { border-color: var(--green); background: var(--green-soft); }
.choice.correct .letter { background: var(--green); color: var(--white); }
.choice.wrong { border-color: var(--wrong); background: var(--wrong-soft); }
.choice.wrong .letter { background: var(--wrong); color: var(--white); }

.feedback { margin-top: 16px; padding: 14px; border-radius: 12px; line-height: 1.5; font-size: .95rem; }
.feedback.ok { background: var(--green-soft); border-left: 4px solid var(--green); }
.feedback.no { background: var(--wrong-soft); border-left: 4px solid var(--wrong); }
.feedback b { display: block; margin-bottom: 4px; }

.actions { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.btn {
  flex: 1; min-width: 140px; padding: 14px 18px; border-radius: 12px; border: 0;
  font: inherit; font-weight: 700; cursor: pointer;
  background: var(--green); color: var(--white);
}
.btn:hover { background: var(--green-dark); }
.btn.secondary { background: var(--white); color: var(--blue); border: 2px solid var(--blue); }
.btn.secondary:hover { background: var(--blue-soft); }
.btn.blue { background: var(--blue); }
.btn.blue:hover { background: #1e40af; }

/* Results */
.result-head { text-align: center; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 18px; }
.ring {
  --p: 0;
  width: 140px; height: 140px; margin: 6px auto 12px; border-radius: 50%;
  background: conic-gradient(var(--green) calc(var(--p) * 1%), var(--line) 0);
  display: grid; place-items: center;
}
.ring > div { width: 112px; height: 112px; border-radius: 50%; background: var(--white); display: grid; place-items: center; font-size: 1.8rem; font-weight: 800; color: var(--blue); }
.verdict { font-weight: 700; font-size: 1.1rem; }
.verdict.pass { color: var(--green-dark); }
.verdict.fail { color: var(--blue); }
.review-title { margin: 26px 0 10px; font-size: 1.1rem; }
.review-item { background: var(--white); border: 1px solid var(--line); border-left: 4px solid var(--wrong); border-radius: 12px; padding: 14px 16px; margin-bottom: 12px; }
.review-item .q { font-weight: 600; margin-bottom: 8px; line-height: 1.45; }
.review-item .row { font-size: .92rem; margin: 4px 0; }
.review-item .yours { color: var(--wrong); }
.review-item .right { color: var(--green-dark); font-weight: 600; }
.review-item .why { margin-top: 8px; font-size: .9rem; color: var(--muted); line-height: 1.5; }
.perfect { text-align: center; padding: 20px; background: var(--green-soft); border-radius: 12px; color: var(--green-dark); font-weight: 600; margin-top: 20px; }

@media (max-width: 480px) {
  .qtext { font-size: 1.04rem; }
  .hero { padding: 14px; }
  .hero .stat b { font-size: 1.25rem; }
}

/* ===== v2 additions ===== */
:root { --amber: #d97706; --amber-soft: #fff7e6; }
.topbar .settings { margin-left: auto; }
.link { background: none; border: 0; padding: 0; color: var(--blue); font: inherit; font-weight: 600; cursor: pointer; text-decoration: underline; text-underline-offset: 2px; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.panel { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 16px; }

/* setup / settings */
.field-label { display: block; font-weight: 700; margin-bottom: 8px; font-size: .95rem; }
.input { width: 100%; padding: 12px 14px; border: 2px solid var(--line); border-radius: 12px; font: inherit; color: inherit; }
.input:focus { outline: none; border-color: var(--blue); }
.mode-opt { display: flex; gap: 12px; align-items: flex-start; padding: 14px; border: 2px solid var(--line); border-radius: 12px; margin-bottom: 10px; cursor: pointer; }
.mode-opt:has(input:checked) { border-color: var(--green); background: var(--green-soft); }
.mode-opt input { margin-top: 4px; accent-color: var(--green); width: 18px; height: 18px; flex: none; }
.mode-opt b { display: block; margin-bottom: 4px; }
.mode-opt span { color: var(--muted); font-size: .88rem; line-height: 1.45; }
.mode-opt b .badge { font-size: .72rem; margin-left: 4px; }
.danger-zone b { display: block; }
.mode-chip { font-size: .86rem; color: var(--muted); margin: -6px 0 16px; }
.card.starred-card { border-color: #f3d38a; background: linear-gradient(180deg, #fffdf6, var(--white)); }

/* sets */
.set-list { display: grid; gap: 10px; margin-bottom: 18px; }
.count-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(64px, 1fr)); gap: 8px; margin: 12px 0 16px; }
.set-item .badge { margin-left: auto; flex: none; }
.set-item { display: flex; align-items: center; gap: 14px; padding: 14px 16px; background: var(--white); border: 1px solid var(--line); border-radius: 14px; font: inherit; color: inherit; text-align: left; cursor: pointer; transition: border-color .12s, box-shadow .12s; }
.set-item:hover { border-color: var(--green); box-shadow: 0 4px 14px rgba(22,163,74,.12); }
.set-num { flex: none; width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; font-weight: 800; color: var(--white); background: linear-gradient(135deg, var(--green), var(--blue)); }
.set-item.all .set-num { background: var(--blue-soft); color: var(--blue); }
.set-info { flex: 1; display: flex; flex-direction: column; }
.set-info span { font-size: .84rem; color: var(--muted); }
.set-score { font-size: .85rem; }
.tips ul { margin: 8px 0 0; padding-left: 20px; line-height: 1.55; color: var(--ink); font-size: .92rem; }

/* quiz head + palette */
.quiz-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 10px; margin-bottom: 8px; }
.quiz-title { font-weight: 700; }
.quiz-count { font-size: .85rem; color: var(--muted); }
.quiz-head .link { font-size: .85rem; white-space: nowrap; }
.progress { margin-bottom: 12px; }
.palette { display: grid; grid-template-columns: repeat(auto-fill, minmax(40px, 1fr)); gap: 6px; margin-bottom: 6px; }
.pal { position: relative; height: 40px; border-radius: 10px; border: 2px solid var(--line); background: var(--white); font: inherit; font-weight: 700; font-size: .9rem; color: var(--muted); cursor: pointer; }
.pal.answered { background: var(--blue); border-color: var(--blue); color: var(--white); }
.pal.unsure { background: var(--amber-soft); border-color: var(--amber); color: var(--amber); }
.pal.correct { background: var(--green); border-color: var(--green); color: var(--white); }
.pal.wrong { background: var(--wrong); border-color: var(--wrong); color: var(--white); }
.pal.current { outline: 3px solid var(--green); outline-offset: 2px; }
.pal-star { position: absolute; top: -7px; right: -5px; font-style: normal; font-size: .8rem; color: #eab308; text-shadow: 0 0 2px #fff, 0 0 2px #fff; }
.legend { display: flex; flex-wrap: wrap; gap: 12px; font-size: .78rem; color: var(--muted); margin-bottom: 14px; }
.legend span { display: inline-flex; align-items: center; gap: 5px; }
.dot { width: 12px; height: 12px; border-radius: 4px; border: 2px solid var(--line); background: var(--white); display: inline-block; }
.dot.answered { background: var(--blue); border-color: var(--blue); }
.dot.unsure { background: var(--amber-soft); border-color: var(--amber); }
.dot.correct { background: var(--green); border-color: var(--green); }
.dot.wrong { background: var(--wrong); border-color: var(--wrong); }

/* question tools */
.qrow { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }
.qtools { display: flex; gap: 8px; }
.tool { display: inline-flex; align-items: center; gap: 5px; padding: 7px 12px; border-radius: 999px; border: 1.5px solid var(--line); background: var(--white); font: inherit; font-size: .85rem; font-weight: 600; color: var(--muted); cursor: pointer; }
.tool:hover { border-color: var(--blue); color: var(--blue); }
.tool.on { border-color: #eab308; color: #a16207; background: #fefce8; }
.tool.help { border-color: var(--green); color: var(--green-dark); background: var(--green-soft); }
.small-tool { padding: 4px 10px; font-size: 1rem; }
.choice.selected { border-color: var(--blue); background: var(--blue-soft); }
.choice.selected .letter { background: var(--blue); color: var(--white); }

.unsure-toggle { display: flex; align-items: center; gap: 10px; width: 100%; margin-top: 16px; padding: 12px; border-radius: 12px; border: 1.5px dashed var(--line); background: var(--white); font: inherit; font-size: .9rem; color: var(--muted); text-align: left; cursor: pointer; }
.unsure-toggle .box { flex: none; width: 24px; height: 24px; border-radius: 6px; border: 2px solid var(--line); display: grid; place-items: center; font-weight: 800; color: var(--white); }
.unsure-toggle.on { border-style: solid; border-color: var(--amber); background: var(--amber-soft); color: #92400e; }
.unsure-toggle.on .box { background: var(--amber); border-color: var(--amber); }

.nav { display: flex; gap: 10px; margin-top: 16px; }
.nav .btn { min-width: 0; }
.btn:disabled { opacity: .45; cursor: default; }
.btn.secondary:disabled:hover { background: var(--white); }
.submit-row { text-align: center; margin-top: 14px; font-size: .9rem; }

/* modal */
.modal-bg { position: fixed; inset: 0; z-index: 50; background: rgba(15,42,61,.45); display: grid; place-items: center; padding: 20px; animation: fade .15s; }
.modal { background: var(--white); border-radius: 18px; padding: 22px; width: 100%; max-width: 440px; max-height: 85vh; overflow: auto; box-shadow: 0 20px 50px rgba(15,42,61,.3); }
.modal-title { font-size: 1.2rem; font-weight: 800; margin-bottom: 12px; }
.modal-text { margin: 0 0 6px; line-height: 1.5; }
.coach-block { background: var(--green-soft); border-radius: 12px; padding: 12px 14px; margin-bottom: 10px; }
.coach-block + .coach-block { background: var(--blue-soft); }
.coach-label { font-size: .75rem; font-weight: 800; text-transform: uppercase; letter-spacing: .4px; color: var(--green-dark); margin-bottom: 4px; }
.coach-block + .coach-block .coach-label { color: var(--blue); }
.coach-block p { margin: 0; line-height: 1.5; }
.coach-block ul { margin: 4px 0 0; padding-left: 18px; line-height: 1.5; font-size: .9rem; }
.sum-block { margin-bottom: 14px; }
.sum-label { font-weight: 700; font-size: .92rem; margin-bottom: 8px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { min-width: 40px; height: 36px; padding: 0 10px; border-radius: 10px; border: 2px solid var(--line); background: var(--white); font: inherit; font-weight: 700; cursor: pointer; color: var(--ink); }
.chip:hover { border-color: var(--blue); }
.chip.unsure { border-color: var(--amber); background: var(--amber-soft); color: #92400e; }
.chip.star { border-color: #eab308; background: #fefce8; color: #a16207; }
@keyframes fade { from { opacity: 0; } }

/* results */
.result-stats { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; margin-top: 8px; font-size: .92rem; color: var(--muted); }
.result-stats .ok { color: var(--green-dark); font-weight: 600; }
.result-stats .no { color: var(--wrong); font-weight: 600; }
.tabs { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 6px; margin-bottom: 12px; -webkit-overflow-scrolling: touch; }
.tab { flex: none; padding: 8px 14px; border-radius: 999px; border: 1.5px solid var(--line); background: var(--white); font: inherit; font-size: .86rem; font-weight: 600; color: var(--muted); cursor: pointer; }
.tab span { opacity: .75; margin-left: 2px; }
.tab.active { background: var(--blue); border-color: var(--blue); color: var(--white); }
.review-item.correct { border-left-color: var(--green); }
.review-item.unanswered { border-left-color: var(--muted); }
.review-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.review-status { font-size: .82rem; font-weight: 700; color: var(--muted); }
.unsure-badge { background: var(--amber-soft); color: #92400e; font-size: .72rem; }

/* ===== v3 additions ===== */
main { padding-bottom: calc(130px + env(safe-area-inset-bottom)); }
.check-row { display: flex; align-items: center; gap: 10px; margin-top: 18px; font-weight: 600; cursor: pointer; }
.check-row input { width: 18px; height: 18px; accent-color: var(--green); }
.mini-bar { height: 6px; background: var(--line); border-radius: 999px; overflow: hidden; }
.mini-bar > div { height: 100%; background: linear-gradient(90deg, var(--green), var(--blue)); }
.card.mock .mini-bar { display: none; }

/* one-line overview */
.palette { display: flex; flex-wrap: nowrap; gap: 4px; overflow-x: auto; scrollbar-width: none; padding: 8px 4px 6px; margin: 0 -4px 4px; scroll-behavior: smooth; }
.palette::-webkit-scrollbar { display: none; }
.pal { flex: 1 0 28px; min-width: 28px; height: 34px; border-radius: 8px; font-size: .8rem; padding: 0; border-width: 1.5px; }
.pal.current { outline-width: 2px; outline-offset: 1px; }
.pal-star { top: -8px; right: -3px; font-size: .7rem; }

/* question arrows */
.qnav { display: flex; gap: 8px; }
.arrow { width: 42px; height: 42px; border-radius: 12px; border: 2px solid var(--blue); background: var(--white); color: var(--blue); display: grid; place-items: center; cursor: pointer; padding: 0; transition: background .12s, transform .12s; }
.arrow:hover:not(:disabled) { background: var(--blue-soft); }
.arrow:active:not(:disabled) { transform: scale(.94); }
.arrow:disabled { opacity: .35; cursor: default; }
#nextBtn.arrow { background: var(--blue); color: var(--white); }
#nextBtn.arrow.submit { background: var(--green); border-color: var(--green); }
.arrow.pulse { animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(29,78,216,.45); } 50% { box-shadow: 0 0 0 8px rgba(29,78,216,0); } }
.qtools { display: flex; gap: 8px; margin-top: 10px; }

/* ===== Kiko the pet ===== */
.pet-wrap { position: fixed; left: 6px; bottom: calc(6px + env(safe-area-inset-bottom)); z-index: 30; width: 92px; transition: transform 1.6s ease-in-out; pointer-events: none; }
.pet { width: 92px; height: 92px; cursor: pointer; pointer-events: auto; transform: scaleX(var(--face, 1)); outline: none; }
.kiko { width: 100%; height: 100%; overflow: visible; }
.k-bod { transform-origin: 60px 108px; animation: bob 2.4s ease-in-out infinite; }
.pet.walking .k-bod { animation: waddle .4s ease-in-out infinite; }
@keyframes bob { 0%,100% { transform: translateY(0) scale(1, 1); } 50% { transform: translateY(-3px) scale(1.02, .98); } }
@keyframes waddle { 0%,100% { transform: rotate(-5deg) translateY(0); } 50% { transform: rotate(5deg) translateY(-4px); } }
.k-eyes { transform-origin: 60px 62px; animation: blink 4.5s infinite; }
@keyframes blink { 0%, 92%, 100% { transform: scaleY(1); } 95% { transform: scaleY(.1); } }
.k-top.sway { transform-origin: 60px 35px; animation: sway 3s ease-in-out infinite; }
.k-top.wiggle { transform-origin: 60px 40px; animation: wiggle 3.4s ease-in-out infinite; }
@keyframes wiggle { 0%,88%,100% { transform: rotate(0); } 92% { transform: rotate(-4deg); } 96% { transform: rotate(4deg); } }
.k-top.flop { transform-origin: 60px 50px; animation: flop 2.4s ease-in-out infinite; }
@keyframes flop { 0%,100% { transform: scaleY(1); } 50% { transform: scaleY(.96); } }
@keyframes sway { 0%,100% { transform: rotate(-6deg); } 50% { transform: rotate(6deg); } }
.m-happy, .m-sad, .k-sparkles { display: none; }
.pet.happy .m-idle, .pet.sad .m-idle { display: none; }
.pet.happy .m-happy, .pet.happy .k-sparkles { display: inline; }
.pet.sad .m-sad { display: inline; }
.pet.happy .k-bod { animation: jump .55s ease-in-out 3; }
@keyframes jump { 0%,100% { transform: translateY(0) scale(1,1); } 20% { transform: translateY(2px) scale(1.08,.9); } 55% { transform: translateY(-22px) scale(.95,1.06); } }
.pet.happy .k-arm-l { transform-origin: 28px 70px; animation: waveL .3s ease-in-out infinite alternate; }
.pet.happy .k-arm-r { transform-origin: 92px 70px; animation: waveR .3s ease-in-out infinite alternate; }
@keyframes waveL { from { transform: rotate(20deg) translateY(-8px); } to { transform: rotate(60deg) translateY(-14px); } }
@keyframes waveR { from { transform: rotate(-20deg) translateY(-8px); } to { transform: rotate(-60deg) translateY(-14px); } }
.pet.happy .k-sparkles path { transform-box: fill-box; transform-origin: center; animation: twinkle .6s ease-in-out infinite alternate; }
@keyframes twinkle { from { transform: scale(.5) rotate(0); opacity: .5; } to { transform: scale(1.2) rotate(45deg); opacity: 1; } }
.pet.sad .k-bod { animation: sob .5s ease-in-out infinite; }
@keyframes sob { 0%,100% { transform: translateY(2px) scale(1.03,.96); } 50% { transform: translateY(4px) scale(1.05,.94); } }
.pet.sad .k-top { animation: droop 1s ease forwards; }
@keyframes droop { to { transform: rotate(-35deg) translateY(3px); } }
.k-tear { animation: tear 1s ease-in infinite; }
.k-tear.t2 { animation-delay: .5s; }
@keyframes tear { 0% { transform: translateY(0); opacity: 1; } 100% { transform: translateY(26px); opacity: 0; } }
.pet.hop .k-bod { animation: jump .5s ease-in-out 1; }
.pet-bubble { position: absolute; bottom: 96px; left: 4px; width: max-content; max-width: 200px; background: var(--white); color: var(--ink); border: 2px solid var(--green); border-radius: 14px; padding: 8px 12px; font-size: .85rem; font-weight: 600; line-height: 1.35; box-shadow: 0 6px 18px rgba(15,42,61,.15); animation: pop .25s ease-out; }
.pet-bubble::after { content: ""; position: absolute; left: 30px; bottom: -8px; width: 12px; height: 12px; background: var(--white); border-right: 2px solid var(--green); border-bottom: 2px solid var(--green); transform: rotate(45deg); }
@keyframes pop { from { transform: scale(.6) translateY(10px); opacity: 0; } }
.pet-hearts span { position: absolute; bottom: 70px; font-size: 1.1rem; animation: floatUp 1.3s ease-out forwards; }
@keyframes floatUp { 0% { transform: translateY(0) scale(.6); opacity: 1; } 100% { transform: translateY(-70px) scale(1.2); opacity: 0; } }

/* ===== AI coach ===== */
.coach-fab { position: fixed; right: 14px; bottom: calc(16px + env(safe-area-inset-bottom)); z-index: 40; display: flex; align-items: center; gap: 8px; padding: 12px 16px; border: 0; border-radius: 999px; background: linear-gradient(120deg, var(--green), var(--blue)); color: var(--white); font: inherit; font-weight: 700; box-shadow: 0 8px 22px rgba(29,78,216,.35); cursor: pointer; }
.coach-fab .fab-ico { font-size: 1.2rem; }
.coach-fab.open { opacity: 0; pointer-events: none; }
.coach-panel { position: fixed; right: 14px; bottom: calc(16px + env(safe-area-inset-bottom)); z-index: 45; width: min(380px, calc(100vw - 28px)); height: min(560px, calc(100vh - 110px)); background: var(--white); border-radius: 20px; box-shadow: 0 20px 50px rgba(15,42,61,.3); display: flex; flex-direction: column; overflow: hidden; animation: pop .2s ease-out; }
.coach-head { display: flex; align-items: center; gap: 10px; padding: 12px 14px; background: linear-gradient(120deg, var(--green-dark), var(--blue)); color: var(--white); }
.coach-head b { display: block; }
.coach-head span { font-size: .75rem; opacity: .85; }
.coach-avatar { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,.2); display: grid; place-items: center; font-size: 1.2rem; flex: none; }
.coach-x { margin-left: auto; border: 0; background: rgba(255,255,255,.18); color: var(--white); width: 32px; height: 32px; border-radius: 10px; cursor: pointer; font-size: 1rem; flex: none; }
.coach-msgs { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 10px; background: var(--bg); }
.cmsg { max-width: 88%; padding: 10px 12px; border-radius: 14px; font-size: .9rem; line-height: 1.45; }
.cmsg.bot { background: var(--white); border: 1px solid var(--line); border-bottom-left-radius: 4px; align-self: flex-start; }
.cmsg.user { background: var(--blue); color: var(--white); border-bottom-right-radius: 4px; align-self: flex-end; }
.cmsg ul { margin: 6px 0; padding-left: 18px; }
.cmsg li { margin: 2px 0; }
.ctable { width: 100%; border-collapse: collapse; margin: 8px 0; font-size: .82rem; }
.ctable td { padding: 4px 2px; }
.ctable td:last-child { text-align: right; white-space: nowrap; }
.cbar { display: inline-block; width: 60px; height: 7px; background: var(--line); border-radius: 999px; overflow: hidden; vertical-align: middle; }
.cbar span { display: block; height: 100%; }
.cacts { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.cbtn { padding: 7px 12px; border-radius: 999px; border: 0; background: var(--green); color: var(--white); font: inherit; font-size: .82rem; font-weight: 700; cursor: pointer; }
.cbtn + .cbtn { background: var(--blue); }
.coach-chips { display: flex; gap: 6px; overflow-x: auto; padding: 8px 10px; border-top: 1px solid var(--line); scrollbar-width: none; }
.coach-chips::-webkit-scrollbar { display: none; }
.chip-q { flex: none; padding: 7px 12px; border-radius: 999px; border: 1.5px solid var(--blue); background: var(--white); color: var(--blue); font: inherit; font-size: .8rem; font-weight: 600; cursor: pointer; }
.coach-input { display: flex; gap: 8px; padding: 10px; border-top: 1px solid var(--line); }
.coach-input input { flex: 1; padding: 10px 14px; border: 2px solid var(--line); border-radius: 999px; font: inherit; font-size: .9rem; min-width: 0; }
.coach-input input:focus { outline: none; border-color: var(--blue); }
.coach-input button { width: 42px; height: 42px; border-radius: 50%; border: 0; background: var(--green); color: var(--white); font-size: 1rem; cursor: pointer; flex: none; }
.typing { display: inline-flex; gap: 4px; }
.typing i { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); animation: dots 1s infinite; }
.typing i:nth-child(2) { animation-delay: .15s; } .typing i:nth-child(3) { animation-delay: .3s; }
@keyframes dots { 0%,100% { opacity: .3; transform: translateY(0); } 50% { opacity: 1; transform: translateY(-3px); } }
@media (max-width: 480px) { .coach-fab .fab-label { display: none; } .coach-fab { padding: 14px; } }
.palette { position: relative; scroll-behavior: auto; }
@media (max-width: 480px) {
  .pet-wrap { width: 68px; left: 2px; }
  .pet { width: 68px; height: 68px; }
  .pet-bubble { bottom: 72px; }
  .pet-hearts span { bottom: 50px; }
}

/* ===== frozen question header ===== */
.quiz-sticky { position: sticky; top: var(--topbar-h, 68px); z-index: 5; background: var(--bg); margin: -20px -16px 0; padding: 14px 16px 0; }
.quiz-sticky.unstick { position: static; }
.qcard-top { border-bottom: 0; border-radius: var(--radius) var(--radius) 0 0; padding-bottom: 12px; box-shadow: 0 6px 10px -8px rgba(15,42,61,.25); }
.qcard-top .qtext { margin-bottom: 0; }
.qcard-bottom { border-top: 0; border-radius: 0 0 var(--radius) var(--radius); padding-top: 8px; }

/* ===== v4: tabs, lessons, analytics, language ===== */
body.has-tabbar main { padding-bottom: calc(150px + env(safe-area-inset-bottom)); }
.tabbar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 35; display: flex; background: var(--white); border-top: 1px solid var(--line); box-shadow: 0 -4px 16px rgba(15,42,61,.08); padding-bottom: env(safe-area-inset-bottom); }
.tabbar button { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 8px 4px 10px; border: 0; background: none; font: inherit; font-size: .75rem; font-weight: 700; color: var(--muted); cursor: pointer; position: relative; }
.tabbar .tab-ico { font-size: 1.3rem; filter: grayscale(.6); opacity: .8; }
.tabbar button.active { color: var(--green-dark); }
.tabbar button.active .tab-ico { filter: none; opacity: 1; }
.tabbar button.active::before { content: ""; position: absolute; top: 0; left: 25%; right: 25%; height: 3px; border-radius: 0 0 3px 3px; background: linear-gradient(90deg, var(--green), var(--blue)); }
body.has-tabbar .pet-wrap { bottom: calc(66px + env(safe-area-inset-bottom)); }
body.has-tabbar .coach-fab { bottom: calc(76px + env(safe-area-inset-bottom)); }
body.has-tabbar .coach-panel { bottom: calc(70px + env(safe-area-inset-bottom)); height: min(540px, calc(100vh - 170px)); }

.lang-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.lang-opt { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 2px; padding: 12px 6px; border: 2px solid var(--line); border-radius: 12px; cursor: pointer; }
.lang-opt input { position: absolute; opacity: 0; pointer-events: none; }
.lang-opt:has(input:checked) { border-color: var(--green); background: var(--green-soft); }
.lang-opt:has(input:focus-visible) { outline: 2px solid var(--blue); outline-offset: 2px; }
.lang-flag { font-size: 1.4rem; }
.lang-opt b { font-size: .92rem; }
.lang-opt span:last-child { font-size: .74rem; color: var(--muted); }

.set-num.read { background: var(--green); }
.lesson-kicker { font-size: .78rem; font-weight: 700; color: var(--blue); text-transform: uppercase; letter-spacing: .4px; }
.lesson { line-height: 1.6; }
.lesson-intro { margin: 0 0 14px; font-size: 1.02rem; }
.lesson-h { font-weight: 800; font-size: .9rem; color: var(--green-dark); margin: 6px 0 6px; }
.lesson-points { margin: 0 0 14px; padding-left: 20px; }
.lesson-points li { margin-bottom: 8px; }
.lesson-example { background: var(--blue-soft); border-radius: 12px; padding: 12px 14px; margin-bottom: 12px; }
.lesson-example .lesson-h { color: var(--blue); }
.lesson-example p { margin: 0 0 6px; }
.ex-answer { font-weight: 600; color: var(--green-dark); }
.lesson-remember { background: var(--green-soft); border-left: 4px solid var(--green); border-radius: 10px; padding: 10px 14px; }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; margin-bottom: 16px; }
.tile { background: var(--white); border: 1px solid var(--line); border-radius: 14px; padding: 14px; }
.tile b { display: block; font-size: 1.5rem; color: var(--ink); }
.tile span { font-size: .8rem; color: var(--muted); }
.chart-title { font-weight: 800; font-size: 1rem; }
.chart-sub { font-size: .8rem; color: var(--muted); margin: 2px 0 10px; }
.chart-legend { display: flex; flex-wrap: wrap; gap: 14px; font-size: .78rem; color: var(--muted); margin: 6px 0 12px; }
.chart-legend span { display: inline-flex; align-items: center; gap: 6px; }
.lg-bar { width: 14px; height: 10px; border-radius: 2px; display: inline-block; }
.lg-bar.pass { background: var(--green); } .lg-bar.below { background: var(--blue); }
.lg-line { width: 16px; height: 0; border-top: 2px dashed var(--ink); display: inline-block; opacity: .6; }
.hbar-chart { display: grid; gap: 10px; }
.hbar-row { display: grid; grid-template-columns: minmax(110px, 38%) 1fr 44px; align-items: center; gap: 10px; border-radius: 8px; outline: none; }
.hbar-row:focus-visible { box-shadow: 0 0 0 2px var(--blue); }
.hbar-label { font-size: .84rem; color: var(--ink); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hbar-track { position: relative; height: 16px; background: #eef3f7; border-radius: 4px; }
.hbar-fill { height: 100%; border-radius: 0 4px 4px 0; transition: width .4s, filter .12s; }
.hbar-fill.pass { background: var(--green); } .hbar-fill.below { background: var(--blue); } .hbar-fill.none { background: transparent; }
.hbar-row:hover .hbar-fill, .hbar-row:focus .hbar-fill { filter: brightness(1.12); }
.hbar-target { position: absolute; top: -3px; bottom: -3px; border-left: 2px dashed rgba(15,42,61,.55); }
.hbar-val { font-size: .84rem; font-weight: 700; text-align: right; font-variant-numeric: tabular-nums; }
.trend-svg { width: 100%; height: auto; display: block; touch-action: pan-y; }
.grid-line { stroke: #e7edf2; stroke-width: 1; }
.axis-text { font-size: 11px; fill: var(--muted); font-family: inherit; }
.target-line { stroke: rgba(15,42,61,.55); stroke-width: 1.5; stroke-dasharray: 5 4; }
.target-text { font-weight: 700; }
.trend-line { fill: none; stroke: var(--blue); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.trend-dot { fill: var(--blue); stroke: var(--white); stroke-width: 2; }
.trend-dot.pass { fill: var(--green); }
.trend-dot.hover { r: 7; }
.crosshair { stroke: var(--muted); stroke-width: 1; }
.crosshair.hidden { display: none; }
.chart-tip { position: absolute; z-index: 60; pointer-events: none; background: var(--white); border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; box-shadow: 0 8px 20px rgba(15,42,61,.18); display: flex; flex-direction: column; gap: 1px; font-size: .8rem; max-width: 240px; }
.chart-tip b { font-size: 1.05rem; }
.topic-list { display: grid; gap: 8px; }
.topic-row { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 12px; }
.topic-name { flex: 1; font-size: .9rem; font-weight: 600; }
.btn-mini { border: 0; background: var(--green); color: var(--white); font: inherit; font-size: .8rem; font-weight: 700; padding: 6px 12px; border-radius: 999px; cursor: pointer; }
.table-view summary { cursor: pointer; font-weight: 700; color: var(--blue); }
.data-table { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: .85rem; }
.data-table th, .data-table td { text-align: left; padding: 7px 6px; border-bottom: 1px solid var(--line); }
.data-table th { color: var(--muted); font-weight: 700; font-size: .78rem; }
.empty-state { text-align: center; }
.empty-ico { font-size: 2.4rem; }

/* ===== v5: calendar, stepper lessons, importance, AI, review ===== */
.tabbar button { font-size: .7rem; }
.imp-chip { display: inline-block; font-size: .7rem; font-weight: 800; padding: 1px 7px; border-radius: 999px; margin-right: 4px; white-space: nowrap; }
.imp-chip.imp3 { background: #fff1e6; color: #b45309; }
.imp-chip.imp2 { background: var(--blue-soft); color: var(--blue); }
.imp-chip.imp1 { background: #eef2f6; color: var(--muted); }
.set-item.imp-border3 { border-left: 4px solid #f59e0b; }
.set-item.imp-border2 { border-left: 4px solid var(--blue); }
.set-item.imp-border1 { border-left: 4px solid var(--line); }
.set-info span { display: block; margin-top: 2px; }
.rec-card { width: 100%; text-align: left; display: flex; flex-direction: column; gap: 4px; padding: 16px; margin-bottom: 16px; border: 0; border-radius: var(--radius); background: linear-gradient(120deg, var(--green), var(--blue)); color: var(--white); font: inherit; cursor: pointer; box-shadow: 0 6px 18px rgba(29,78,216,.2); }
.rec-card .rec-kicker { font-size: .75rem; font-weight: 700; opacity: .9; text-transform: uppercase; letter-spacing: .3px; }
.rec-card b { font-size: 1.1rem; }
.rec-card span:last-child { font-size: .85rem; opacity: .9; }

.stepper { margin: 6px 0 14px; }
.step-count { font-size: .8rem; color: var(--muted); font-weight: 600; margin-bottom: 6px; }
.step-dots { display: flex; gap: 4px; }
.step-dots span { flex: 1; height: 6px; border-radius: 999px; background: var(--line); transition: background .2s; }
.step-dots span.done { background: var(--green); }
.step-dots span.on { background: var(--blue); }
.step-card { background: var(--white); border: 1px solid var(--line); border-radius: 18px; padding: 22px 20px; line-height: 1.6; animation: slideIn .28s ease-out; min-height: 220px; }
@keyframes slideIn { from { opacity: 0; transform: translateX(24px); } }
.step-card.intro, .step-card.done { text-align: center; }
.step-card.intro .mini-outline { text-align: left; }
.step-emoji { font-size: 2.6rem; }
.step-card h2 { margin: 8px 0; }
.mini-outline { margin: 6px 0 16px; padding-left: 22px; color: var(--ink); }
.mini-outline li { margin: 3px 0; }
.point-num { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; font-size: 1.4rem; font-weight: 800; color: var(--white); background: linear-gradient(135deg, var(--green), var(--blue)); margin-bottom: 10px; }
.point-text { font-size: 1.12rem; line-height: 1.6; margin: 6px 0 12px; }
.step-card.example { background: var(--blue-soft); border-color: #c9d8fb; }
.step-card.check .choices { margin-top: 8px; }
.step-nav { margin-top: 14px; }
.actions.col { flex-direction: column; }
.actions.col .btn { width: 100%; }
.center { text-align: center; }
.yt-btn { display: block; text-align: center; margin: 14px 0 4px; padding: 12px; border-radius: 12px; background: #fff; border: 2px solid #ef4444; color: #dc2626; font-weight: 800; text-decoration: none; }
.yt-btn:hover { background: #fef2f2; }
.video-card { display: flex; gap: 12px; align-items: center; text-align: left; padding: 12px; border-radius: 12px; background: #0f172a; color: #fff; text-decoration: none; margin-top: 12px; }
.video-card small { display: block; opacity: .7; font-size: .72rem; }
.vc-play { width: 40px; height: 40px; border-radius: 50%; background: #ef4444; display: grid; place-items: center; flex: none; }
.video-embed { position: relative; padding-top: 56.25%; border-radius: 12px; overflow: hidden; margin-top: 12px; background: #000; }
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.card.ai-card { border-color: #c7d2fe; background: linear-gradient(180deg, #f5f7ff, var(--white)); }
.ai-badge { display: inline-block; margin-left: 6px; padding: 1px 7px; border-radius: 999px; background: linear-gradient(120deg, var(--green), var(--blue)); color: #fff; font-size: .68rem; letter-spacing: 0; text-transform: none; }
.ai-loading { display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 16px 0; text-align: center; }
.spinner { width: 42px; height: 42px; border-radius: 50%; border: 4px solid var(--line); border-top-color: var(--blue); border-right-color: var(--green); animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.toast { position: fixed; left: 50%; top: calc(80px + env(safe-area-inset-top)); transform: translateX(-50%); z-index: 70; max-width: min(420px, calc(100vw - 32px)); background: var(--ink); color: #fff; padding: 12px 16px; border-radius: 14px; font-size: .88rem; line-height: 1.4; box-shadow: 0 10px 30px rgba(15,42,61,.3); animation: pop .25s ease-out; transition: opacity .4s; }
.toast.out { opacity: 0; }
.review-banner { width: 100%; display: flex; align-items: center; gap: 12px; text-align: left; padding: 14px 16px; margin-bottom: 16px; border-radius: 14px; border: 2px solid #f59e0b; background: #fffbeb; font: inherit; color: var(--ink); cursor: pointer; }
.review-banner > span:first-child { font-size: 1.5rem; }
.review-banner > span:nth-child(2) { flex: 1; display: flex; flex-direction: column; }
.review-banner small { color: var(--muted); }

/* calendar */
.countdown { display: flex; align-items: center; gap: 16px; padding: 18px; margin-bottom: 14px; border-radius: var(--radius); background: linear-gradient(120deg, var(--green-dark), var(--blue)); color: #fff; }
.cd-num { font-size: 2.6rem; font-weight: 800; line-height: 1; }
.cd-info { display: flex; flex-direction: column; }
.cd-info span { opacity: .9; font-size: .88rem; }
.prep-row { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; margin-bottom: 8px; flex-wrap: wrap; }
.progress.big { height: 12px; margin: 0; }
.set-exam { width: 100%; text-align: left; display: flex; flex-direction: column; gap: 4px; font: inherit; cursor: pointer; border: 2px dashed var(--blue); }
.cal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.cal-head .arrow { width: 36px; height: 36px; font-size: 1.3rem; background: var(--white); color: var(--blue); }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.cal-wd { text-align: center; font-size: .72rem; font-weight: 700; color: var(--muted); padding-bottom: 2px; }
.cal-cell { aspect-ratio: 1; border-radius: 8px; border: 1px solid var(--line); background: var(--white); font: inherit; padding: 3px; display: flex; flex-direction: column; justify-content: space-between; align-items: flex-start; cursor: pointer; min-width: 0; }
.cal-cell.empty { border: 0; background: none; cursor: default; }
.cal-d { font-size: .72rem; font-weight: 700; color: var(--muted); }
.cal-n { align-self: flex-end; font-size: .72rem; font-weight: 800; }
.cal-cell.l1 { background: #d4f1e6; border-color: #d4f1e6; }
.cal-cell.l2 { background: #8fd9c0; border-color: #8fd9c0; }
.cal-cell.l3 { background: #137a58; border-color: #137a58; }
.cal-cell.l3 .cal-d, .cal-cell.l3 .cal-n { color: #fff; }
.cal-cell.l1 .cal-n, .cal-cell.l2 .cal-n { color: #14532d; }
.cal-cell.today { outline: 2px solid var(--blue); outline-offset: 1px; }
.cal-cell.exam { box-shadow: inset 0 0 0 2px var(--blue); }
.cal-cell.sel { transform: scale(1.06); box-shadow: 0 4px 10px rgba(15,42,61,.2); }
.cal-legend { display: flex; flex-wrap: wrap; align-items: center; gap: 5px; margin-top: 10px; font-size: .74rem; color: var(--muted); }
.cal-legend i { width: 14px; height: 14px; border-radius: 3px; border: 1px solid var(--line); display: inline-block; }
.cal-legend i.l0 { background: #fff; } .cal-legend i.l1 { background: #d4f1e6; } .cal-legend i.l2 { background: #8fd9c0; } .cal-legend i.l3 { background: #137a58; }
.day-detail { margin-top: 12px; padding: 12px; border-radius: 12px; background: var(--bg); display: flex; flex-direction: column; gap: 4px; font-size: .9rem; }
.day-detail ul { margin: 4px 0 0; padding-left: 18px; }

/* ===== v6: Kiko is the chat ===== */
.coach-fab { display: none; }
body.no-pet .coach-fab { display: flex; }
.pet { cursor: pointer; }
.pet-ask { position: absolute; right: -4px; top: 6px; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; font-size: .85rem; background: linear-gradient(120deg, var(--green), var(--blue)); box-shadow: 0 3px 8px rgba(29,78,216,.35); pointer-events: auto; cursor: pointer; animation: askPulse 2.4s ease-in-out infinite; }
@keyframes askPulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.15); } }
.pet-wrap.chatting .pet-ask { display: none; }
.pet-wrap.chatting { z-index: 46; }
.pet-bubble { pointer-events: auto; cursor: pointer; }
.coach-avatar { background: #fff; overflow: hidden; width: 42px; height: 42px; }
.kiko-mini { width: 40px; height: 40px; }
.kiko-mini .m-happy, .kiko-mini .m-sad, .kiko-mini .k-sparkles { display: none; }
/* chat opens beside Kiko on the left */
.coach-panel { left: 14px; right: auto; }
@media (min-width: 520px) { .coach-panel { left: 110px; } }
@media (max-width: 480px) {
  .pet-ask { width: 24px; height: 24px; font-size: .75rem; top: 2px; right: -6px; }
  .coach-panel { left: 10px; width: calc(100vw - 20px); }
  body.has-tabbar .coach-panel { bottom: calc(140px + env(safe-area-inset-bottom)); height: min(500px, calc(100vh - 240px)); }
  .coach-panel { bottom: calc(84px + env(safe-area-inset-bottom)); height: min(520px, calc(100vh - 170px)); }
}

/* ===== v7: cute tabs, buddy picker, unsaved, calendar date, explanations ===== */
.tabbar .tab-ico { filter: none; opacity: 1; width: 30px; height: 30px; display: grid; place-items: center; border-radius: 12px; transition: transform .2s, background .2s; }
.tab-svg { width: 28px; height: 28px; filter: grayscale(1) opacity(.5); transition: filter .2s; }
.tabbar button.active .tab-ico { background: var(--green-soft); transform: translateY(-3px); animation: tabBounce .45s ease-out; }
.tabbar button.active .tab-svg { filter: none; }
.tabbar button:hover .tab-svg { filter: grayscale(.3) opacity(.85); }
@keyframes tabBounce { 0% { transform: translateY(0) scale(1); } 40% { transform: translateY(-7px) scale(1.12); } 100% { transform: translateY(-3px) scale(1); } }
.tabbar button.active::before { display: none; }

.char-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.char-opt { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 8px 2px 6px; border: 2px solid var(--line); border-radius: 12px; cursor: pointer; font-size: .74rem; font-weight: 700; color: var(--muted); }
.char-opt input { position: absolute; opacity: 0; pointer-events: none; }
.char-opt .kiko-mini { width: 46px; height: 46px; }
.char-opt:has(input:checked) { border-color: var(--green); background: var(--green-soft); color: var(--green-dark); }
.char-opt:has(input:focus-visible) { outline: 2px solid var(--blue); outline-offset: 2px; }
.save-row { align-items: center; }
.unsaved-badge { flex: none; font-size: .8rem; font-weight: 700; color: #b45309; }
.unsaved-badge.hidden { display: none; }

.cd-change { margin-top: 6px; align-self: flex-start; border: 0; background: rgba(255,255,255,.2); color: #fff; font: inherit; font-size: .8rem; font-weight: 700; padding: 5px 10px; border-radius: 999px; cursor: pointer; }
.date-row { display: flex; gap: 8px; margin-top: 8px; }
.date-row .input { flex: 1; min-width: 0; }
.date-row .btn { flex: none; min-width: 0; }
.set-exam { cursor: default; }

.explain-link { display: inline-block; margin-top: 10px; font-size: .88rem; }
.ex-sec { background: var(--bg); border-radius: 10px; padding: 8px 10px; margin-bottom: 8px; }
.ex-sec > b { display: block; margin-bottom: 4px; }
.ex-sec ol { margin: 4px 0 0; padding-left: 20px; }
.ex-sec i { font-style: normal; font-weight: 700; color: var(--muted); font-size: .8rem; }
.ex-choice { display: inline-block; margin: 2px 4px 2px 0; padding: 1px 7px; border-radius: 6px; background: var(--white); border: 1px solid var(--line); font-size: .82rem; }
.ex-answer { margin-top: 6px; font-weight: 700; color: var(--green-dark); }
.ex-sec.trick { background: #fffbeb; border-left: 3px solid #f59e0b; }
.cmsg.user small { opacity: .85; }

/* ===== v8: syllabus grouping ===== */
.syllabus-note { margin: -6px 0 6px; padding: 8px 12px; border-radius: 10px; background: var(--blue-soft); color: var(--blue); font-size: .84rem; font-weight: 600; }
.unit-head { display: flex; align-items: center; gap: 8px; margin: 12px 0 2px; font-weight: 800; font-size: .92rem; color: var(--ink); }
.unit-head:first-child { margin-top: 0; }
.unit-num { width: 24px; height: 24px; border-radius: 8px; display: grid; place-items: center; background: var(--ink); color: #fff; font-size: .78rem; flex: none; }

/* ===== v9: backup ===== */
.backup-panel > b { display: block; }
.backup-meta { display: flex; flex-direction: column; gap: 4px; font-size: .84rem; margin-bottom: 12px; }
.backup-btns { display: flex; gap: 8px; margin-bottom: 8px; }
.backup-btns .btn { flex: 1; min-width: 0; padding: 12px 8px; font-size: .88rem; }
.file-btn { display: grid; place-items: center; text-align: center; cursor: pointer; }
.code-box { min-height: 120px; font-family: ui-monospace, monospace; font-size: .72rem; word-break: break-all; resize: vertical; }

/* ===== v10: chat on phones, error-recognition layout ===== */
/* 3. hide the buddy while the chat is open (the chat header shows its face) */
.pet-wrap.chatting { display: none; }
/* 2. on phones the chat is a full-height sheet; header stays frozen, only messages scroll */
@media (max-width: 520px) {
  body.chat-open { overflow: hidden; }
  .coach-panel, body.has-tabbar .coach-panel { left: 8px; right: 8px; width: auto; top: 8px; bottom: 8px; height: auto; z-index: 80; }
}
.coach-head { flex: none; position: sticky; top: 0; z-index: 1; }
.coach-chips, .coach-input { flex: none; }
.coach-msgs { min-height: 0; overscroll-behavior: contain; }
.coach-input input { font-size: 16px; } /* prevents iPhone zoom-in when typing */

/* 4. error recognition: underlined parts with the letter below, like the exam */
.err-prompt { display: block; margin-bottom: 14px; }
.err-sentence { display: block; line-height: 1.2; }
.err-sentence.noerr { margin-top: 6px; text-align: center; }
.seg { display: inline-flex; flex-direction: column; align-items: center; vertical-align: top; margin: 0 3px 12px; }
.seg u { text-decoration-thickness: 2px; text-underline-offset: 5px; text-decoration-color: var(--blue); }
.seg b { margin-top: 6px; font-size: .82rem; font-weight: 800; color: var(--blue); }
.point-text.qtext { margin-bottom: 12px; }

/* ===== v11: compact question toolbar, chat typing mode ===== */
.qrow { flex-wrap: nowrap; }
.qtools { margin-top: 0; align-items: center; gap: 6px; flex-wrap: wrap; }
.tool.icon { width: 34px; height: 34px; padding: 0; justify-content: center; border-radius: 10px; font-size: 1.05rem; }
.qnav { gap: 6px; flex: none; }
.arrow { width: 34px; height: 34px; border-radius: 10px; }
.arrow svg { width: 18px; height: 18px; }
.qrow + .qtext { margin-top: 12px; }
.qrow .qsubject { font-size: .72rem; }
.coach-panel.typing .coach-chips { display: none; }
.coach-input textarea { flex: 1; min-width: 0; resize: none; padding: 10px 14px; border: 2px solid var(--line); border-radius: 20px; font: inherit; font-size: 16px; line-height: 1.35; max-height: 96px; overflow-y: auto; }
.coach-input textarea:focus { outline: none; border-color: var(--blue); }
.coach-input { align-items: flex-end; }

/* ===== v12: key-point examples, word helper, word bank ===== */
.ex-head { margin: 14px 0 8px; font-weight: 800; font-size: .9rem; color: var(--blue); }
.ex-list { display: grid; gap: 8px; }
.ex-card { display: flex; gap: 10px; align-items: flex-start; text-align: left; width: 100%; padding: 10px 12px; border-radius: 12px; border: 1.5px dashed #c9d8fb; background: var(--blue-soft); font: inherit; color: var(--ink); cursor: pointer; }
.ex-n { flex: none; width: 24px; height: 24px; border-radius: 8px; display: grid; place-items: center; font-weight: 800; font-size: .8rem; color: #fff; background: var(--blue); }
.ex-body { display: flex; flex-direction: column; gap: 4px; line-height: 1.45; }
.ex-a { display: none; font-weight: 700; color: var(--green-dark); }
.ex-card.open { border-style: solid; border-color: var(--green); background: var(--green-soft); }
.ex-card.open .ex-a { display: block; animation: pop .25s ease-out; }
.ex-card.open .ex-n { background: var(--green); }

/* long-press areas: no native selection menu */
.qtext, .choice, .step-card, .review-item, .feedback, .why, .wb-card, .modal-text, .coach-block { -webkit-touch-callout: none; -webkit-user-select: none; user-select: none; }
.word-sheet { align-items: end; }
.word-sheet .modal { animation: sheetUp .22s ease-out; }
@keyframes sheetUp { from { transform: translateY(40px); opacity: 0; } }
.w-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.w-word { font-size: 1.5rem; font-weight: 800; }
.w-pos { font-size: .8rem; font-weight: 700; color: var(--muted); font-style: italic; }
.w-head .tool { margin-left: auto; }
.w-row { display: flex; flex-direction: column; gap: 2px; padding: 8px 0; border-bottom: 1px solid var(--line); line-height: 1.45; }
.w-label { font-size: .72rem; font-weight: 800; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); }
.w-memory { display: flex; gap: 12px; align-items: center; margin-top: 12px; padding: 12px; border-radius: 14px; background: #fffbeb; border: 2px solid #fcd34d; }
.w-pic { font-size: 2.2rem; line-height: 1.1; flex: none; max-width: 40%; text-align: center; }
.w-memory p { margin: 4px 0 0; line-height: 1.45; }
.w-link { display: block; text-align: center; margin-top: 12px; text-decoration: none; }

.wb-entry { width: 100%; display: flex; align-items: center; gap: 12px; text-align: left; padding: 14px 16px; margin-bottom: 16px; border-radius: 14px; border: 2px solid #fcd34d; background: #fffbeb; font: inherit; color: var(--ink); cursor: pointer; }
.wb-entry > span:nth-child(2) { flex: 1; display: flex; flex-direction: column; }
.wb-entry small { color: var(--muted); }
.wb-pics { font-size: 1.6rem; }
.wb-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.wb-card { position: relative; min-height: 170px; border: 1px solid var(--line); border-radius: 16px; background: var(--white); font: inherit; color: var(--ink); cursor: pointer; padding: 0; perspective: 600px; }
.wb-front, .wb-back { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; padding: 12px; border-radius: 16px; backface-visibility: hidden; transition: transform .45s; text-align: center; }
.wb-back { transform: rotateY(180deg); background: linear-gradient(160deg, var(--green-soft), var(--blue-soft)); font-size: .8rem; line-height: 1.35; justify-content: flex-start; overflow: auto; }
.wb-card.flipped .wb-front { transform: rotateY(180deg); }
.wb-card.flipped .wb-back { transform: rotateY(360deg); }
.wb-pic { font-size: 2.4rem; }
.wb-front b { font-size: 1.05rem; }
.wb-front small { color: var(--muted); font-style: italic; }
.wb-tl { font-weight: 700; color: var(--green-dark); }
.wb-trick { color: #92400e; }

/* ===== v13: install ===== */
.install-panel { position: relative; border: 2px solid var(--green); background: linear-gradient(160deg, var(--green-soft), var(--white)); }
.install-panel > b { display: block; padding-right: 28px; }
.install-panel .btn { display: block; width: 100%; text-align: center; text-decoration: none; margin-top: 6px; }
.install-steps { margin: 0 0 6px; line-height: 1.5; font-size: .92rem; }
.install-x { position: absolute; top: 8px; right: 8px; width: 30px; height: 30px; border: 0; border-radius: 10px; background: rgba(15,42,61,.06); font: inherit; cursor: pointer; color: var(--muted); }
.ex-try { list-style: none; padding: 0; margin: 6px 0 0; }
.ex-try li { padding: 4px 0; }
.ex-try li.ok { color: var(--green-dark); font-weight: 700; }
.ex-try li.no { color: var(--muted); }

/* ===== v15: AI key ===== */
.ai-panel > b { display: block; }
.ai-status { padding: 8px 12px; border-radius: 10px; background: #eef2f6; font-size: .86rem; font-weight: 700; color: var(--muted); margin-bottom: 10px; }
.ai-status.on { background: var(--green-soft); color: var(--green-dark); }
.ai-provs { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.ai-prov { display: flex; flex-direction: column; gap: 2px; padding: 10px; border: 2px solid var(--line); border-radius: 12px; cursor: pointer; }
.ai-prov input { position: absolute; opacity: 0; pointer-events: none; }
.ai-prov:has(input:checked) { border-color: var(--green); background: var(--green-soft); }
.ai-prov span { font-size: .76rem; color: var(--muted); }
.ai-get { display: inline-block; margin-top: 10px; font-size: .88rem; font-weight: 700; color: var(--blue); }
select.input { background: var(--white); }

/* ===== v16: collapsible settings ===== */
.settings-form { margin: 0; }
.set-sec { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 10px; overflow: hidden; }
.set-sec > summary { list-style: none; display: flex; align-items: center; gap: 12px; padding: 14px 16px; cursor: pointer; }
.set-sec > summary::-webkit-details-marker { display: none; }
.sec-ico { flex: none; width: 36px; height: 36px; border-radius: 12px; display: grid; place-items: center; font-size: 1.15rem; background: var(--green-soft); }
.sec-txt { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.sec-txt small { color: var(--muted); font-size: .8rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sec-chev { color: var(--muted); transition: transform .2s; }
.set-sec[open] .sec-chev { transform: rotate(180deg); }
.set-sec[open] > summary { border-bottom: 1px solid var(--line); }
.sec-body { padding: 14px 16px 16px; animation: fade .2s; }
.sec-body .panel { border: 0; padding: 0; margin: 0; background: none; box-shadow: none; }
.sec-body .panel > b:first-child { display: none; }
.sec-body .install-panel { border: 0; }
.settings-form .save-row { position: sticky; bottom: calc(10px + env(safe-area-inset-bottom)); z-index: 4; background: var(--bg); padding: 8px 0; margin-top: 0; }
.setup-sec { margin-bottom: 18px; }
.setup-h { font-weight: 800; margin-bottom: 10px; }

/* ===== v17: center chat tab, buddy placement ===== */
.tabbar .tab-chat { position: relative; }
.tabbar .tab-chat .tab-ico { width: 54px; height: 54px; margin-top: -22px; border-radius: 50%; background: linear-gradient(135deg, var(--green), var(--blue)); box-shadow: 0 6px 16px rgba(29,78,216,.35); border: 3px solid var(--white); display: grid; place-items: center; overflow: hidden; }
.tabbar .tab-chat .tab-ico .kiko-mini { width: 46px; height: 46px; background: transparent; }
.tabbar .tab-chat .tab-label { color: var(--blue); }
.tabbar .tab-chat::before { display: none; }
.tab-ico.react-happy { animation: tabCheer .5s ease-in-out 3; }
.tab-ico.react-sad { animation: tabSad .6s ease-in-out 2; filter: saturate(.6); }
@keyframes tabCheer { 0%,100% { transform: translateY(0) scale(1); } 50% { transform: translateY(-8px) scale(1.1); } }
@keyframes tabSad { 0%,100% { transform: rotate(0); } 25% { transform: rotate(-8deg); } 75% { transform: rotate(8deg); } }
/* the chat tab replaces the floating chat button; keep the button only during a quiz when the buddy is at home */
.coach-fab { display: none !important; }
body.no-pet:not(.has-tabbar) .coach-fab { display: flex !important; }

/* ===== v18: similar question in Help, subject tips card ===== */
.sim-q { font-weight: 600; margin: 4px 0 8px !important; }
.coach-block .sim-a { background: var(--white); }
.sim-rule { display: none; margin: 8px 0 0 !important; }
.sim-rule.show { display: block; }
.tips-card { background: #fffbeb; border: 2px solid #fcd34d; border-radius: var(--radius); padding: 0 14px; margin: 0 0 14px; }
.tips-card > summary { list-style: none; display: flex; align-items: center; gap: 8px; padding: 12px 0; cursor: pointer; }
.tips-card > summary::-webkit-details-marker { display: none; }
.tips-card > summary b { flex: 1; }
.tips-card[open] .sec-chev { transform: rotate(180deg); }
.tips-card ul { margin: 0 0 12px; padding-left: 20px; line-height: 1.55; font-size: .92rem; }
.tips-card li { margin-bottom: 6px; }
.num-list { display: flex; flex-direction: column; gap: 8px; }
.num-item { display: flex; gap: 10px; align-items: baseline; padding: 8px 12px; border-radius: 10px; background: var(--bg); border: 1px solid var(--line); line-height: 1.45; }
.num-item b { flex: none; color: var(--blue); }

/* ===== v19: score celebration ===== */
.cel-bg { background: rgba(15,42,61,.6); }
.cel-canvas { position: fixed; inset: 0; width: 100vw; height: 100vh; pointer-events: none; z-index: 0; }
.cel-bg .modal { position: relative; z-index: 1; text-align: center; overflow: visible; animation: celPop .45s cubic-bezier(.2,1.4,.4,1); }
@keyframes celPop { from { transform: scale(.6); opacity: 0; } }
.cel-good .cel-title { color: var(--green-dark); }
.cel-mid .cel-title { color: var(--blue); }
.cel-low .cel-title { color: #b45309; }
.cel-kiko { width: 120px; height: 120px; margin: -70px auto 0; }
.cel-kiko .kiko-mini { width: 120px; height: 120px; overflow: visible; }
/* faces: happy for good/mid, encouraging smile + hearts for low */
.cel-kiko.happy .m-idle { display: none; }
.cel-kiko.happy .m-happy, .cel-kiko.happy .k-sparkles { display: inline; }
.cel-kiko.dance .kiko-mini { animation: kDance .9s ease-in-out infinite; transform-origin: 60px 110px; }
@keyframes kDance { 0%,100% { transform: rotate(-10deg) translateY(0); } 25% { transform: rotate(0) translateY(-14px); } 50% { transform: rotate(10deg) translateY(0); } 75% { transform: rotate(0) translateY(-14px); } }
.cel-kiko.dance .k-arm-l { transform-origin: 28px 70px; animation: waveL .3s ease-in-out infinite alternate; }
.cel-kiko.dance .k-arm-r { transform-origin: 92px 70px; animation: waveR .3s ease-in-out infinite alternate; }
.cel-kiko.dance .k-sparkles path { transform-box: fill-box; transform-origin: center; animation: twinkle .6s ease-in-out infinite alternate; }
.cel-kiko.bounce .kiko-mini { animation: kBounce 1.1s ease-in-out infinite; transform-origin: 60px 110px; }
@keyframes kBounce { 0%,100% { transform: translateY(0) scale(1,1); } 40% { transform: translateY(-10px) scale(.97,1.03); } 60% { transform: translateY(0) scale(1.04,.96); } }
.cel-kiko.cheerup .k-arm-r { transform-origin: 92px 70px; animation: waveR .5s ease-in-out infinite alternate; }
.cel-ring { --p: 0; width: 130px; height: 130px; margin: 6px auto 6px; border-radius: 50%; background: conic-gradient(var(--green) calc(var(--p) * 1%), var(--line) 0); display: grid; place-items: center; }
.cel-low .cel-ring { background: conic-gradient(#f59e0b calc(var(--p) * 1%), var(--line) 0); }
.cel-mid .cel-ring { background: conic-gradient(var(--blue) calc(var(--p) * 1%), var(--line) 0); }
.cel-ring > div { width: 104px; height: 104px; border-radius: 50%; background: var(--white); display: grid; place-items: center; font-size: 1.9rem; font-weight: 800; color: var(--ink); }
.cel-count { color: var(--muted); font-weight: 600; font-size: .9rem; }
.cel-title { margin: 10px 0 6px; font-size: 1.4rem; }
.cel-text { margin: 0 0 6px; line-height: 1.5; }
@media (prefers-reduced-motion: reduce) { .cel-kiko .kiko-mini, .cel-bg .modal { animation: none !important; } }
.cel-num { white-space: nowrap; }
.caught { text-align: center; }
.caught-ico { font-size: 2.6rem; }
.sim-choices { margin: 4px 0 10px; padding-left: 22px; font-size: .9rem; line-height: 1.5; }
.sim-ask { width: 100%; margin: 4px 0 8px; }

/* ===== v21: guided tour ===== */
.tour { position: fixed; inset: 0; z-index: 90; }
.tour-spot { position: fixed; border-radius: 14px; box-shadow: 0 0 0 9999px rgba(15,42,61,.68); transition: all .3s ease; pointer-events: none; }
.tour-spot::after { content: ""; position: absolute; inset: -3px; border-radius: 16px; border: 3px solid #fcd34d; animation: tourPulse 1.4s ease-in-out infinite; }
@keyframes tourPulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: .5; transform: scale(1.04); } }
.tour-card { position: fixed; width: min(340px, calc(100vw - 20px)); background: var(--white); border-radius: 18px; padding: 16px; box-shadow: 0 16px 40px rgba(15,42,61,.35); animation: pop .25s ease-out; }
.tour-card.center { left: 50% !important; top: 50% !important; bottom: auto !important; transform: translate(-50%, -50%); }
.tour-head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.tour-face { width: 46px; height: 46px; flex: none; }
.tour-face .kiko-mini { width: 46px; height: 46px; }
.tour-card.center .tour-face, .tour-card.center .tour-face .kiko-mini { width: 64px; height: 64px; }
.tour-head b { font-size: 1.08rem; }
.tour-card p { margin: 0 0 12px; line-height: 1.5; }
.tour-dots { display: flex; gap: 5px; justify-content: center; margin-bottom: 12px; }
.tour-dots span { width: 7px; height: 7px; border-radius: 50%; background: var(--line); }
.tour-dots span.done { background: var(--green); }
.tour-dots span.on { background: var(--blue); width: 18px; border-radius: 4px; }
.tour-btns { display: flex; align-items: center; gap: 8px; }
.tour-gap { flex: 1; }
.tour-btns .btn { flex: none; min-width: 0; padding: 10px 16px; }
body.touring .pet-wrap { display: none; }
textarea.input { resize: vertical; font: inherit; font-size: 16px; line-height: 1.4; }

/* ===== v24: report pictures ===== */
.rp-pics { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.rp-pic { position: relative; width: 84px; height: 84px; border-radius: 10px; overflow: hidden; border: 1px solid var(--line); }
.rp-pic img { width: 100%; height: 100%; object-fit: cover; display: block; }
.rp-pic button { position: absolute; top: 4px; right: 4px; width: 24px; height: 24px; border-radius: 50%; border: 0; background: rgba(15,42,61,.7); color: #fff; font-size: .75rem; cursor: pointer; }
.rp-add { width: 100%; }

/* ===== v25: donations ===== */
.don-note { padding: 10px 12px; border-radius: 12px; background: var(--green-soft); color: var(--green-dark); font-weight: 700; margin-bottom: 10px; }
.don-row { border: 2px solid var(--don); border-radius: 14px; padding: 12px; margin-bottom: 10px; }
.don-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.don-logo { font-weight: 900; color: #fff; background: var(--don); padding: 4px 10px; border-radius: 8px; }
.don-num { font-weight: 800; font-size: 1.1rem; letter-spacing: .5px; font-variant-numeric: tabular-nums; }
.don-row .btn { text-decoration: none; text-align: center; }
.don-qr { text-align: center; margin-top: 6px; }
.don-qr img { width: 200px; max-width: 70%; border-radius: 12px; border: 1px solid var(--line); display: block; margin: 0 auto 6px; }
.don-chat { line-height: 1.5; }
.don-qr img { width: 280px; max-width: 90%; }

/* ===== v27: Settings tab; Learn inside Settings ===== */
#settingsBtn { display: none !important; }
.learn-card { width: 100%; display: flex; align-items: center; gap: 12px; text-align: left; padding: 16px; margin-bottom: 14px; border: 0; border-radius: var(--radius); background: linear-gradient(120deg, var(--green), var(--blue)); color: #fff; font: inherit; cursor: pointer; box-shadow: 0 6px 18px rgba(29,78,216,.2); }
.lc-ico { font-size: 1.8rem; }
.lc-txt { flex: 1; display: flex; flex-direction: column; }
.lc-txt b { font-size: 1.08rem; }
.lc-txt small { opacity: .9; }
.learn-card.soon { background: #e5e7eb; color: var(--muted); box-shadow: none; cursor: not-allowed; filter: grayscale(1); margin-bottom: 16px; }
.learn-card.soon .lc-txt b { color: var(--ink); opacity: .7; }
.soon-badge { flex: none; font-size: .72rem; font-weight: 800; padding: 3px 8px; border-radius: 999px; background: var(--white); color: var(--muted); border: 1px solid var(--line); }
.card.ai-card { grid-column: 1 / -1; }

/* ===== v33: friendly "chat with your smartest friend" look (chat first) ===== */
:root { --chat-blue: #1f5eff; --chat-blue-dark: #1446c9; --chat-bg: #f4f8ff; --chat-line: #d6e3ff; --chat-ink: #0a2a6b; --chat-sky: #e3edff; --chat-muted: #5b6f99; --chat-display: "Baloo 2", "Nunito", system-ui, sans-serif; }
.coach-panel, .coach-panel button, .coach-panel textarea { font-family: "Nunito", ui-rounded, "Segoe UI", system-ui, sans-serif; }
.coach-panel { background: var(--chat-bg); border-radius: 26px; color: var(--chat-ink); }
.coach-head { background: var(--chat-blue); padding: 14px 16px 22px; position: relative; }
.coach-head::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 12px; background: radial-gradient(circle at 12px 0, var(--chat-blue) 11px, transparent 12px) 0 0 / 24px 12px repeat-x; transform: translateY(100%); }
.coach-head b { font-size: 1.15rem; font-weight: 900; }
.coach-head span { font-weight: 700; opacity: .9; }
.coach-avatar { width: 48px; height: 48px; border-radius: 16px; box-shadow: 0 3px 0 rgba(0,0,0,.18); }
.coach-x { background: rgba(255,255,255,.22); border-radius: 50%; }
.coach-msgs { background: var(--chat-bg); padding: 22px 14px 14px; gap: 14px; }
.cmsg { font-size: 1rem; font-weight: 600; line-height: 1.5; border-radius: 22px; padding: 12px 16px; max-width: 92%; }
.cmsg.bot { background: #fff; border: 2px solid var(--chat-line); border-bottom-left-radius: 22px; color: var(--chat-ink); }
.cmsg.user { background: var(--chat-blue); border-bottom-right-radius: 8px; box-shadow: 0 3px 0 var(--chat-blue-dark); font-weight: 700; }
.chead { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; }
.cav { width: 28px; height: 28px; border-radius: 50%; background: var(--chat-bg); overflow: hidden; display: grid; place-items: center; flex: none; }
.cav .kiko-mini { width: 28px; height: 28px; }
.cname { color: var(--chat-blue); font-weight: 900; font-size: .95rem; }
.cmsg b { font-weight: 900; }
.cbtn { background: var(--chat-blue); box-shadow: 0 3px 0 var(--chat-blue-dark); font-weight: 800; padding: 8px 14px; }
.cbtn + .cbtn { background: #fff; color: var(--chat-blue); border: 2px solid var(--chat-line); box-shadow: 0 3px 0 var(--chat-line); }
.coach-chips { border-top: 2px solid var(--chat-line); background: #fff; padding: 10px; gap: 8px; }
.chip-q { border: 0; background: var(--chat-bg); color: var(--chat-ink); font: inherit; font-weight: 800; font-size: .88rem; padding: 9px 14px; border-radius: 999px; white-space: nowrap; cursor: pointer; }
.coach-input { background: #fff; padding: 10px 12px 12px; border-top: 2px solid var(--chat-line); }
.coach-chips + .coach-input { border-top: 0; padding-top: 2px; }
.coach-input textarea { background: var(--chat-bg); border: 2px solid var(--chat-line); border-radius: 24px; font-weight: 600; color: var(--chat-ink); }
.coach-input textarea:focus { border-color: var(--chat-blue); }
.coach-input button { background: var(--chat-blue); width: 48px; height: 44px; border-radius: 16px; box-shadow: 0 3px 0 var(--chat-blue-dark); }
.typing i { background: var(--chat-blue); }
.tabbar .tab-chat .tab-ico { background: var(--chat-blue); box-shadow: 0 4px 0 var(--chat-blue-dark); }
.tabbar .tab-chat .tab-label { color: var(--chat-blue); font-weight: 900; }

/* ===== v33b: the same friendly look across the whole app ===== */
:root {
  --blue: #1f5cf5; --blue-soft: #e6eefe; --ink: #1b2a4e; --muted: #5f6f93; --line: #d3def7; --bg: #eef4ff;
  --green: #1fa67a; --green-dark: #137a58; --green-soft: #e1f5ee; --radius: 22px;
  --pop: 0 4px 0 #1442b8; --pop-soft: 0 4px 0 #d3def7;
}
body, button, input, textarea, select { font-family: "Nunito", ui-rounded, "Segoe UI", system-ui, sans-serif; }
body { font-weight: 600; }
h1, h2, h3 { font-weight: 900; }
b, strong { font-weight: 800; }
/* top bar: solid blue with the scalloped edge */
.topbar { background: var(--blue); box-shadow: none; padding-bottom: 20px; margin-bottom: 12px; }
.topbar::after { content: ""; position: absolute; left: 0; right: 0; bottom: -12px; height: 12px; background: radial-gradient(circle at 12px 0, var(--blue) 11px, transparent 12px) 0 0 / 24px 12px repeat-x; pointer-events: none; }
.topbar h1 { font-weight: 900; }
.logo { background: #fff; color: var(--blue); border-radius: 14px; box-shadow: 0 3px 0 rgba(0,0,0,.18); font-weight: 900; }
.tagline { font-weight: 700; }
.icon-btn { border-radius: 50%; background: rgba(255,255,255,.22); }
/* cards: white, thick light-blue border */
.hero .stat, .card, .qcard, .panel, .tile, .set-item, .step-card, .review-item, .result-head, .topic-row, .modal, .review-banner, .wb-entry { border: 2px solid var(--line); border-radius: var(--radius); box-shadow: none; }
.review-item { border-left-width: 6px; }
.card:hover, .card:focus-visible, .set-item:hover { border-color: var(--blue); box-shadow: var(--pop-soft); transform: translateY(-2px); }
.card.mock, .rec-card, .learn-card, .countdown { background: var(--blue); border: 0; box-shadow: var(--pop); color: #fff; }
.card.starred-card { border-color: #fcd34d; background: #fffdf3; }
.card.ai-card { border-color: var(--line); background: #fff; }
.badge { background: var(--blue-soft); color: var(--blue); font-weight: 800; }
.badge.blue { background: var(--blue); color: #fff; }
.hero .stat b, .ring > div { color: var(--blue); font-weight: 900; }
/* chunky 3D buttons */
.btn { background: var(--blue); border-radius: 18px; font-weight: 800; box-shadow: var(--pop); transition: transform .08s, box-shadow .08s; }
.btn:hover { background: var(--blue); filter: brightness(1.06); }
.btn:active { transform: translateY(3px); box-shadow: 0 1px 0 #1442b8; }
.btn.blue { background: var(--blue); }
.btn.secondary { background: #fff; color: var(--blue); border: 2px solid var(--line); box-shadow: var(--pop-soft); }
.btn.secondary:hover { background: var(--blue-soft); }
.btn-mini { background: var(--blue); border-radius: 999px; box-shadow: 0 2px 0 #1442b8; }
.link, .table-view summary { color: var(--blue); }
/* progress */
.progress, .mini-bar { background: var(--line); height: 12px; }
.progress > div, .mini-bar > div { background: var(--blue); border-radius: 999px; }
.step-dots span.on { background: var(--blue); }
/* answers */
.choice { border: 2px solid var(--line); border-radius: 18px; font-weight: 700; }
.choice:hover:not(:disabled), .choice.selected { border-color: var(--blue); background: var(--blue-soft); box-shadow: var(--pop-soft); }
.choice .letter { background: var(--blue-soft); color: var(--blue); border-radius: 50%; font-weight: 900; }
.choice.selected .letter { background: var(--blue); }
.choice.correct { border-color: var(--green); background: var(--green-soft); box-shadow: 0 4px 0 #8fd9c0; }
.choice.wrong { border-color: #f97316; background: #fff1e6; box-shadow: 0 4px 0 #fdba74; }
.feedback { border-radius: 18px; }
.qsubject, .lesson-kicker { color: var(--blue); font-weight: 900; }
.tool, .tab, .chip, .arrow { border: 2px solid var(--line); border-radius: 999px; font-weight: 800; color: var(--muted); }
.arrow { border-radius: 16px; color: var(--blue); box-shadow: var(--pop-soft); }
#nextBtn.arrow { background: var(--blue); border-color: var(--blue); box-shadow: var(--pop); color: #fff; }
.tab.active { background: var(--blue); border-color: var(--blue); box-shadow: 0 3px 0 #1442b8; }
.tool.help { background: var(--blue-soft); border-color: var(--line); color: var(--blue); }
.pal { border-radius: 12px; }
.pal.answered, .dot.answered { background: var(--blue); border-color: var(--blue); }
.pal.current { outline-color: var(--blue); }
.input, .coach-input textarea { border: 2px solid var(--line); border-radius: 18px; background: #fff; font-weight: 600; }
.mode-opt, .lang-opt { border: 2px solid var(--line); border-radius: 18px; }
.mode-opt:has(input:checked), .lang-opt:has(input:checked) { border-color: var(--blue); background: var(--blue-soft); }
.mode-opt input, .check-row input { accent-color: var(--blue); }
.set-num { background: var(--blue); border-radius: 50%; }
.set-num.read { background: var(--green); }
.set-item.all .set-num { background: var(--blue-soft); }
/* analytics */
.tile b { color: var(--blue); font-weight: 900; }
.hbar-track { height: 18px; border-radius: 999px; background: var(--blue-soft); }
.hbar-fill { border-radius: 999px; }
.hbar-fill.below, .lg-bar.below { background: var(--blue); }
.trend-line { stroke-width: 3; }
.chart-title { font-weight: 900; }
/* calendar */
.cal-cell { border: 2px solid var(--line); border-radius: 14px; font-weight: 700; }
.cal-cell.l1 { background: #dbe7ff; border-color: #dbe7ff; }
.cal-cell.l2 { background: #8fb0ff; border-color: #8fb0ff; }
.cal-cell.l3 { background: var(--blue); border-color: var(--blue); }
.cal-cell.l1 .cal-n, .cal-cell.l2 .cal-n { color: #12307f; }
.cal-legend i.l1 { background: #dbe7ff; } .cal-legend i.l2 { background: #8fb0ff; } .cal-legend i.l3 { background: var(--blue); }
.cal-cell.today { outline-color: #f59e0b; }
.cal-cell.exam { box-shadow: inset 0 0 0 3px var(--blue); }
.day-detail { background: var(--blue-soft); border-radius: 18px; }
.set-exam { border-color: var(--blue); border-radius: 18px; }
/* bottom tab bar */
.tabbar { border-top: 2px solid var(--line); box-shadow: none; border-radius: 24px 24px 0 0; }
.tabbar button { font-weight: 800; }
.tabbar button.active { color: var(--blue); }
.tabbar button.active .tab-ico { background: var(--blue-soft); }
/* Kiko's speech bubble, toasts, modals */
.pet-bubble { border-color: var(--line); border-radius: 18px; font-weight: 700; box-shadow: var(--pop-soft); }
.pet-bubble::after { border-color: var(--line); }
.coach-block { background: var(--blue-soft); border-radius: 18px; }
.coach-block + .coach-block { background: #fff7e0; }
.coach-label { color: var(--blue); }
.toast { border-radius: 999px; font-weight: 800; }
.spinner { border-right-color: var(--blue); }
.ai-badge { background: var(--blue); }
.lesson-h { color: var(--blue); }
.install-panel { border-color: var(--blue); background: var(--blue-soft); }
.sec-body, .sec-head { font-weight: 700; }

/* ===== v36: chat box styled after the Budget Bubble chat (palette, 15px text, sheet layout) ===== */
.coach-panel { font-size: 15px; line-height: 1.45; background: var(--chat-bg); color: var(--chat-ink); }
.coach-head { background: var(--chat-blue); padding: 12px 14px 20px; gap: 10px; }
.coach-head::after { bottom: 1px; background: radial-gradient(circle at 14px 0, var(--chat-blue) 13px, transparent 14px) 0 0 / 28px 14px repeat-x; height: 14px; transform: translateY(100%); }
.coach-head b { font-family: var(--chat-display); font-weight: 700; font-size: 17px; line-height: 1.1; }
.coach-head span { font-size: 11px; font-weight: 700; opacity: .9; }
.coach-avatar { width: 46px; height: 46px; border-radius: 14px; box-shadow: 0 4px 0 var(--chat-blue-dark); }
.coach-x { width: 38px; height: 38px; border-radius: 12px; background: rgba(255,255,255,.18); }
.coach-msgs { padding: 20px 14px 12px; gap: 10px; background: var(--chat-bg); }
.cmsg { font-size: 15px; font-weight: 500; line-height: 1.45; padding: 10px 13px; border-radius: 18px; max-width: 86%; box-shadow: none; }
.cmsg.bot { background: #fff; border: 2px solid var(--chat-line); border-bottom-left-radius: 6px; color: var(--chat-ink); }
.cmsg.user { background: var(--chat-blue); color: #fff; border-bottom-right-radius: 6px; font-weight: 500; box-shadow: none; }
.chead { gap: 6px; margin-bottom: 2px; }
.cav, .cav .kiko-mini { width: 22px; height: 22px; }
.cname { font-size: 12px; font-weight: 800; color: var(--chat-blue); }
.coach-chips { background: #fff; border-top: 2px solid var(--chat-line); padding: 8px 10px 0; gap: 6px; }
.chip-q { background: var(--chat-sky); color: var(--chat-ink); font-weight: 700; font-size: 13px; padding: 6px 11px; }
.coach-input { background: #fff; padding: 8px 10px; border-top: 0; gap: 8px; }
.coach-chips ~ .coach-input { padding-top: 8px; }
.coach-input textarea { background: var(--chat-bg); border: 2px solid var(--chat-line); border-radius: 16px; padding: 10px 12px; font-weight: 500; color: var(--chat-ink); }
.coach-input textarea:focus { border-color: var(--chat-blue); }
.coach-input button { width: 46px; height: 46px; border-radius: 15px; background: var(--chat-blue); box-shadow: 0 3px 0 var(--chat-blue-dark); }
.cbtn { background: var(--chat-blue); box-shadow: 0 3px 0 var(--chat-blue-dark); font-family: var(--chat-display); font-weight: 700; font-size: 14px; }
.cbtn + .cbtn { background: #fff; color: var(--chat-blue); border: 2px solid var(--chat-line); box-shadow: 0 3px 0 var(--chat-line); }
.tabbar .tab-chat .tab-ico { background: var(--chat-blue); box-shadow: 0 4px 0 var(--chat-blue-dark); }
.coach-backdrop { display: none; position: fixed; inset: 0; z-index: 79; background: rgba(10,42,107,.25); }
/* phones: bottom sheet */
@media (max-width: 520px) {
  .coach-backdrop:not(.hidden) { display: block; }
  .coach-panel, body.has-tabbar .coach-panel { left: 0; right: 0; width: auto; top: 14%; bottom: 0; height: auto; border-radius: 24px 24px 0 0; box-shadow: 0 -8px 24px rgba(10,42,107,.2); }
  .coach-input { padding-bottom: calc(8px + env(safe-area-inset-bottom)); }
}
/* laptop: side panel on the right */
@media (min-width: 900px) {
  .coach-backdrop:not(.hidden) { display: block; background: rgba(10,42,107,.12); }
  .coach-panel, body.has-tabbar .coach-panel { left: auto; right: 0; top: 0; bottom: 0; width: 440px; height: auto; border-radius: 24px 0 0 24px; box-shadow: -8px 0 24px rgba(10,42,107,.2); z-index: 80; }
}
/* chat scrolling: we manage "stick to the bottom" ourselves; leave a little air under the last bubble */
.coach-msgs { overflow-anchor: none; padding-bottom: 18px; }

/* ===== chat opened from the center tab: full screen between the top bar and the tab bar, like the other tabs ===== */
body .coach-panel.full, body.has-tabbar .coach-panel.full { position: fixed; left: 0; right: 0; top: var(--topbar-h, 68px); bottom: var(--tabbar-h, 64px); width: min(760px, 100%); height: auto; margin: 0 auto; border-radius: 0; box-shadow: none; z-index: 30; background: var(--chat-bg); animation: none; }
.coach-panel.full .coach-head { background: #fff; color: var(--chat-ink); border-bottom: 2px solid var(--chat-line); padding: 10px 14px; }
.coach-panel.full .coach-head::after { display: none; }
.coach-panel.full .coach-head span { color: var(--chat-muted); }
.coach-panel.full .coach-x { display: none; }
.coach-panel.full .coach-avatar { width: 40px; height: 40px; background: var(--chat-bg); box-shadow: none; }
.coach-panel.full .coach-msgs { padding-top: 14px; }
body.chat-full { overflow: hidden; }
body.chat-full .tabbar .tab-chat .tab-label { text-decoration: underline; text-underline-offset: 3px; }
body.chat-full .tabbar button.active:not(.tab-chat) { color: var(--muted); }
body.chat-full .tabbar button.active:not(.tab-chat) .tab-ico { background: none; transform: none; animation: none; }

/* speed timer: a draining bar, no digits */
.tm-bar { height: 24px; padding: 3px; margin-bottom: 10px; border-radius: 999px; border: 3px solid var(--ink); background: var(--white); }
.tm-bar .tm-fill { height: 100%; border-radius: 999px; background: #f98a00; transition: width .25s linear, background .3s; }
.tm-bar.low .tm-fill { background: #ea580c; }
.tm-bar.bad .tm-fill { background: #dc2626; animation: tmPulse 1s ease-in-out infinite; }
@keyframes tmPulse { 50% { opacity: .65; } }
@media (prefers-reduced-motion: reduce) { .tm-bar .tm-fill { transition: none; animation: none !important; } }
.tm-result { margin: 12px 0 4px; text-align: left; }
.tm-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(90px, 1fr)); gap: 8px; margin: 8px 0; }
.tm-grid > div { background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 10px; text-align: center; }
.tm-grid b { display: block; font-size: 1.15rem; }
.tm-grid span { font-size: .75rem; color: var(--muted); }
.tm-grid .slow b { color: var(--wrong); }
.tm-grid .fast b { color: var(--green-dark); }
.tm-split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 10px; align-items: stretch; margin: 8px 0; }
.tm-table { width: 100%; border-collapse: collapse; font-size: .8rem; background: var(--bg); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.tm-table th { text-align: left; font-weight: 600; color: var(--muted); padding: 6px 8px; }
.tm-table td { text-align: right; font-weight: 800; padding: 6px 8px; }
.tm-table tr + tr > * { border-top: 1px solid var(--line); }
.tm-table .slow { color: var(--wrong); } .tm-table .fast { color: var(--green-dark); }
.tm-beat { display: flex; flex-direction: column; justify-content: center; gap: 6px; text-align: center; padding: 10px; border-radius: 12px; background: var(--blue-soft); border: 2px solid var(--blue); }
.tm-beat-t { font-weight: 900; font-size: .8rem; color: var(--blue); }
.tm-beat-i b { display: block; font-size: 1.4rem; color: var(--ink); line-height: 1.1; }
.tm-beat-i span { font-size: .72rem; color: var(--muted); }
.slow-note p { margin: 0 0 6px; }
.slow-note .slow-time { font-size: 1.1rem; font-weight: 800; color: var(--wrong); }
.slow-note { margin: 8px 0; padding: 10px 12px; border-radius: 10px; background: var(--amber-soft); border: 1px solid var(--amber); font-size: .88rem; }
.cel-time { color: var(--muted); font-size: .85rem; margin-top: 4px; }

/* timer tip bubble */
.tm-tip { position: absolute; left: 16px; right: 16px; top: 52px; z-index: 6; padding: 10px 14px; border-radius: 14px; background: var(--ink); color: #fff; font-weight: 700; font-size: .9rem; box-shadow: 0 6px 18px rgba(15,42,61,.3); cursor: pointer; }
.tm-tip::before { content: ""; position: absolute; top: -7px; left: 28px; border: 7px solid transparent; border-top: 0; border-bottom-color: var(--ink); }

/* rank chip (top right) and rank card */
.rank-chip { margin-left: auto; display: flex; align-items: center; gap: 6px; background: rgba(255,255,255,.18); border: 0; color: #fff; border-radius: 14px; padding: 4px 10px 4px 6px; cursor: pointer; font: inherit; }
.rank-chip + .settings { margin-left: 0; }
.rank-chip:focus-visible { outline: 3px solid #fde68a; outline-offset: 2px; }
.rk-txt { display: grid; gap: 3px; text-align: left; line-height: 1; }
.rk-txt b { font-size: .78rem; max-width: 84px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rk-bar { display: block; width: 100%; height: 5px; border-radius: 99px; background: rgba(255,255,255,.3); overflow: hidden; }
.rk-bar > i { display: block; height: 100%; background: #fde68a; border-radius: 99px; }
.rk-card { display: grid; gap: 10px; text-align: left; }
.rk-top { display: flex; align-items: center; gap: 12px; }
.rk-name { font-weight: 800; font-size: 1.2rem; }
.rk-stage { font-weight: 700; font-size: .85rem; }
.rk-xp { margin-left: auto; text-align: right; font-size: .85rem; color: var(--muted); }
.rk-xp b { font-size: 1.15rem; color: var(--ink); }
.rk-prog { height: 12px; border-radius: 99px; background: var(--line); overflow: hidden; }
.rk-prog > i { display: block; height: 100%; border-radius: 99px; transition: width .4s; }
.rk-sub { font-size: .88rem; color: var(--muted); font-weight: 600; }
.rk-gate { background: var(--amber-soft); border: 1px solid var(--amber); border-radius: 10px; padding: 8px 10px; font-size: .88rem; }
.rk-ladder { display: grid; gap: 2px; max-height: 340px; overflow-y: auto; }
.rk-stage-h { font-weight: 800; font-size: .8rem; text-transform: uppercase; letter-spacing: .5px; margin-top: 8px; }
.rk-row { display: flex; align-items: center; gap: 10px; padding: 4px 8px; border-radius: 10px; opacity: .6; }
.rk-row.done { opacity: .9; }
.rk-row.me { opacity: 1; background: var(--blue-soft); font-weight: 800; }
.rk-need { margin-left: auto; font-size: .8rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.rk-you { font-size: .7rem; background: var(--blue); color: #fff; border-radius: 99px; padding: 1px 8px; }
.xp-line { display: flex; align-items: center; justify-content: center; gap: 6px; margin: 6px 0; font-weight: 700; }
.xp-line .up, .cel-xp.up { color: var(--green-dark); } .xp-line .down, .cel-xp.down { color: var(--wrong); }
.cel-xp { font-family: var(--chat-display, inherit); font-weight: 800; font-size: 1.4rem; margin-top: 6px; }
.cel-rank { margin-top: 4px; font-weight: 800; color: var(--blue); } .cel-rank.down { color: var(--wrong); }
@media (max-width: 400px) { .topbar .tagline { display: none; } .rk-txt b { max-width: 64px; } }
.set-num.plain, .set-item .set-num.plain { background: none; border-radius: 0; font-size: 1.6rem; }
.roll-wrap { position: relative; height: 156px; margin: 8px 0 14px; }
.roll-band { position: absolute; left: 12%; right: 12%; top: 52px; height: 52px; border-top: 2px solid var(--blue); border-bottom: 2px solid var(--blue); pointer-events: none; }
.roll { height: 100%; overflow-y: scroll; scroll-snap-type: y mandatory; scrollbar-width: none; cursor: grab; text-align: center; -webkit-mask-image: linear-gradient(transparent, #000 30%, #000 70%, transparent); mask-image: linear-gradient(transparent, #000 30%, #000 70%, transparent); }
.roll::-webkit-scrollbar { display: none; }
.roll-item { height: 52px; line-height: 52px; scroll-snap-align: center; font-size: 1.4rem; font-weight: 800; color: var(--muted); user-select: none; transition: color .12s, font-size .12s; }
.roll-item.on { color: var(--blue); font-size: 2rem; }
.roll-pad { height: 52px; }