/* STAAR Power Portal — Design System
   Visual: Super build's dark premium palette + glass-morphism
   Components: Masterpiece build's feature-rich layout system
   Expanded: Grade 3–6 color tokens + shared patterns */

:root {
  /* Core palette (super-derived dark premium) */
  --bg: #09111f;
  --bg2: #0f1a2d;
  --panel: #13213a;
  --panel-glass: rgba(255,255,255,.05);
  --text: #eef4ff;
  --ink: #eef4ff;
  --muted: #8fa3c8;
  --line: rgba(255,255,255,.10);
  --shadow: 0 18px 50px rgba(0,0,0,.35);
  --radius: 24px;
  --max: 1180px;

  /* Accent palette */
  --hot: #ff5fa2;
  --gold: #ffd166;
  --cyan: #5ee6ff;
  --lime: #9cff57;
  --purple: #9a7cff;
  --blue: #4fb3ff;
  --teal: #16d1c1;
  --danger: #ff8f70;

  /* Grade tokens */
  --grade3: #5ee6ff;
  --grade4: #ffd166;
  --grade5: #9cff57;
  --grade6: #c084fc;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box }
html { scroll-behavior: smooth }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: #09111f;
  min-height: 100vh;
}
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(circle at 18% 12%, rgba(94,230,255,.14), transparent 26%),
    radial-gradient(circle at 82% 8%, rgba(255,95,162,.12), transparent 22%),
    radial-gradient(circle at 55% 80%, rgba(156,255,87,.08), transparent 24%),
    linear-gradient(180deg, #07101e 0%, #09111f 40%, #0a1222 100%);
  pointer-events: none;
}
a { color: inherit; text-decoration: none }
img { max-width: 100% }
ul { padding-left: 18px }

/* ── Layout ── */
.container { width: min(var(--max), calc(100% - 32px)); margin: 0 auto }
.section { padding: 48px 0 }
.center { text-align: center }

/* ── Topbar ── */
.topbar {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(16px);
  background: rgba(9,17,31,.72);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 14px 0;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  font-weight: 900; letter-spacing: .02em; font-size: 1.05rem;
}
.brand small { display: block; color: var(--muted); font-weight: 700; font-size: .78rem; margin-top: 2px }
.badge-orb {
  width: 42px; height: 42px; border-radius: 14px; flex-shrink: 0;
  background: conic-gradient(from 160deg, var(--hot), var(--gold), var(--cyan), var(--purple), var(--hot));
  box-shadow: inset 0 0 18px rgba(255,255,255,.15), 0 0 24px rgba(94,230,255,.16);
  position: relative;
}
.badge-orb::before {
  content: ""; position: absolute; inset: 6px; border-radius: 10px;
  background: linear-gradient(180deg, rgba(255,255,255,.30), rgba(255,255,255,.06));
}
.badge-orb::after {
  content: "\2605"; position: absolute; inset: 0; display: grid; place-items: center;
  color: #fff; font-size: 18px; font-weight: 900;
}
.nav-links { display: flex; gap: 10px; flex-wrap: wrap; align-items: center }
.nav-links a {
  padding: 10px 14px; border-radius: 999px;
  border: 1px solid var(--line); background: rgba(255,255,255,.04);
  color: var(--text); font-weight: 700; font-size: .92rem;
  transition: .2s ease;
}
.nav-links a:hover { background: rgba(255,255,255,.08); transform: translateY(-1px) }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 20px; border: 1px solid var(--line); border-radius: 999px;
  font-weight: 900; cursor: pointer; font-size: .95rem;
  background: rgba(255,255,255,.06); color: var(--text);
  box-shadow: 0 8px 24px rgba(0,0,0,.2);
  transition: .2s ease;
  text-decoration: none;
}
.btn:hover { transform: translateY(-2px); background: rgba(255,255,255,.10) }
.btn.primary {
  background: linear-gradient(135deg, var(--hot), #ff7a59);
  border-color: transparent; color: #fff;
  box-shadow: 0 10px 30px rgba(255,95,162,.28);
}
.btn.primary:hover { box-shadow: 0 14px 36px rgba(255,95,162,.38) }
.btn.secondary {
  background: linear-gradient(135deg, var(--purple), #6366f1);
  border-color: transparent; color: #fff;
}
.btn.teal {
  background: linear-gradient(135deg, var(--teal), #28e3a8);
  border-color: transparent; color: #07111e;
}
.btn.ghost {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
  box-shadow: none;
}

/* ── Hero ── */
.hero { padding: 64px 0 48px; position: relative; overflow: hidden }
.hero-grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 30px; align-items: center;
}
.eyebrow {
  display: inline-flex; gap: 8px; align-items: center;
  padding: 8px 14px; border-radius: 999px;
  background: rgba(94,230,255,.10); color: var(--cyan);
  border: 1px solid rgba(94,230,255,.18);
  font-weight: 800; font-size: .84rem; letter-spacing: .02em;
}
h1 {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  line-height: .96; margin: 18px 0 16px; letter-spacing: -.04em;
}
.hero p { font-size: 1.08rem; color: var(--muted); line-height: 1.7; max-width: 60ch }
.hero-actions, .cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px }

/* Hero visual card */
.hero-card {
  border: 1px solid var(--line); border-radius: 32px;
  background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.03));
  box-shadow: var(--shadow); overflow: hidden;
}
.hero-visual {
  padding: 24px;
  background:
    radial-gradient(circle at 18% 22%, rgba(255,209,102,.30), transparent 25%),
    radial-gradient(circle at 80% 10%, rgba(94,230,255,.20), transparent 24%),
    radial-gradient(circle at 70% 80%, rgba(156,255,87,.14), transparent 24%),
    linear-gradient(180deg, #162544 0%, #111c34 100%);
  min-height: 400px; display: flex; align-items: center; justify-content: center;
}
.mascot-svg { width: min(88%, 380px); filter: drop-shadow(0 24px 50px rgba(0,0,0,.3)) }

/* ── Typography ── */
h2 { font-size: clamp(1.7rem, 3vw, 2.8rem); margin: 0 0 14px; line-height: 1.05; letter-spacing: -.03em }
h3 { font-size: 1.2rem; margin: 0 0 10px }
h4 { font-size: 1.05rem; margin: 0 0 10px }
.lead { color: var(--muted); font-size: 1.04rem; line-height: 1.7; max-width: 75ch }
.small { font-size: .92rem }
.muted { color: var(--muted) }
.kicker {
  font-size: .82rem; text-transform: uppercase; letter-spacing: .12em;
  font-weight: 900; color: var(--gold);
}

/* ── Grids ── */
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 18px }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px }

/* ── Cards & Panels ── */
.card, .panel, .feature-card, .lesson-card, .stat-card, .mission-card,
.question-card, .mini-card, .timeline-card, .countdown-box, .cheat {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  padding: 22px; box-shadow: var(--shadow);
}
.feature-icon {
  width: 54px; height: 54px; border-radius: 18px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 12px; font-size: 1.5rem; font-weight: 900;
  background: linear-gradient(135deg, rgba(94,230,255,.20), rgba(154,124,255,.16));
  border: 1px solid rgba(255,255,255,.10);
}

/* ── Grade Cards (Landing Page) ── */
.grade-cards { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; margin-top: 24px }
.grade-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  padding: 28px 22px; text-align: center;
  box-shadow: var(--shadow); transition: .25s ease;
  position: relative; overflow: hidden;
}
.grade-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 5px;
}
.grade-card[data-grade="3"]::before { background: linear-gradient(90deg, var(--grade3), var(--blue)) }
.grade-card[data-grade="4"]::before { background: linear-gradient(90deg, var(--grade4), var(--danger)) }
.grade-card[data-grade="5"]::before { background: linear-gradient(90deg, var(--grade5), var(--teal)) }
.grade-card[data-grade="6"]::before { background: linear-gradient(90deg, var(--grade6), var(--hot)) }
.grade-card:hover { transform: translateY(-4px); border-color: rgba(255,255,255,.18) }
.grade-card .grade-num {
  font-size: 3rem; font-weight: 900; letter-spacing: -.04em;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.grade-card[data-grade="4"] .grade-num {
  background: linear-gradient(135deg, var(--gold), var(--danger));
  -webkit-background-clip: text; background-clip: text;
}
.grade-card[data-grade="5"] .grade-num {
  background: linear-gradient(135deg, var(--lime), var(--teal));
  -webkit-background-clip: text; background-clip: text;
}
.grade-card[data-grade="6"] .grade-num {
  background: linear-gradient(135deg, var(--grade6), var(--hot));
  -webkit-background-clip: text; background-clip: text;
}
.grade-card h3 { margin-top: 8px }
.grade-card .btn { margin-top: 16px; width: 100% }

/* ── Tags & Pills ── */
.tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-radius: 999px;
  border: 1px solid var(--line); background: rgba(255,255,255,.06);
  font-size: .84rem; font-weight: 800;
}
.pill-row { display: flex; flex-wrap: wrap; gap: 10px }
.pill {
  padding: 10px 14px; border-radius: 999px;
  background: rgba(255,255,255,.06); border: 1px solid var(--line);
  font-weight: 800; cursor: pointer; color: var(--text); font-size: .9rem;
  transition: .15s ease;
}
.pill.active { background: linear-gradient(135deg, var(--cyan), var(--purple)); color: #07111e; border-color: transparent }

/* ── Countdown ── */
.countdown-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 12px }
.countdown-box { text-align: center; padding: 18px }
.countdown-box .num { font-size: 2rem; font-weight: 900 }

/* ── Study Hub (subject tabs) ── */
.study-hub {
  padding: 24px; border-radius: 28px;
  background: linear-gradient(180deg, rgba(12,21,39,.85), rgba(12,21,39,.55));
  border: 1px solid var(--line);
}
.subject-tabs { display: flex; gap: 10px; flex-wrap: wrap; margin: 14px 0 20px }
.subject-tab {
  padding: 10px 16px; border-radius: 999px;
  border: 1px solid var(--line); font-weight: 800; cursor: pointer;
  background: rgba(255,255,255,.05); color: var(--text); font-size: .92rem;
  transition: .18s ease;
}
.subject-tab.active {
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  color: #07111e; border-color: transparent;
}
.subject-panel { display: none }
.subject-panel.active { display: block }
.cheat-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 18px }
.cheat h4 { color: var(--gold) }
.callout {
  padding: 14px 16px; border-left: 4px solid var(--gold);
  background: rgba(255,209,102,.08); border-radius: 16px;
  color: #fff6d7; font-weight: 700;
}

/* ── Missions ── */
.mission-card { border-top: 5px solid var(--cyan) }
.mission-card.math { border-top-color: var(--gold) }
.mission-card.mixed { border-top-color: var(--purple) }
.mission-card.confidence { border-top-color: var(--hot) }

/* ── Practice Arena ── */
.practice-layout { display: grid; grid-template-columns: 340px 1fr; gap: 20px }
.sidebar-stack { display: grid; gap: 18px; align-self: start; position: sticky; top: 88px }
.question-card { display: grid; gap: 14px }
.question-header { display: flex; justify-content: space-between; gap: 12px; align-items: flex-start }
.option {
  width: 100%; text-align: left; padding: 14px 16px;
  border-radius: 16px; border: 2px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04); color: var(--text);
  font-weight: 700; cursor: pointer; transition: .15s ease; font-size: .95rem;
}
.option:hover { border-color: rgba(94,230,255,.3); background: rgba(94,230,255,.06) }
.option.correct { border-color: var(--lime); background: rgba(156,255,87,.10) }
.option.wrong { border-color: var(--danger); background: rgba(255,143,112,.10) }
.option:disabled { cursor: default; opacity: .85 }
.explanation {
  padding: 16px; border-radius: 18px;
  background: rgba(94,230,255,.06); border: 1px solid rgba(94,230,255,.14); display: none;
}
.explanation.show { display: block }
.timer {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 12px 14px; border-radius: 18px;
  background: rgba(255,209,102,.06); border: 1px solid rgba(255,209,102,.14);
}

/* ── Dashboard & Stats ── */
.stat-card .kpi { font-size: 2rem; font-weight: 900; letter-spacing: -.04em }
.meter {
  height: 14px; background: rgba(255,255,255,.08); border-radius: 999px;
  overflow: hidden; position: relative;
}
.meter > span {
  position: absolute; inset: 0 auto 0 0; border-radius: 999px;
  background: linear-gradient(90deg, var(--lime), var(--cyan), var(--hot));
  width: 0%;
}
.table-lite { width: 100%; border-collapse: collapse }
.table-lite th, .table-lite td {
  padding: 12px; border-bottom: 1px solid rgba(255,255,255,.08); text-align: left;
}

/* ── Badges ── */
.badge-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px }
.badge {
  padding: 18px; text-align: center;
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.10); border-radius: var(--radius);
}
.badge.locked { opacity: .45; filter: saturate(.5) }
.badge-icon { font-size: 36px }
.badge strong { display: block; margin-top: 10px }

/* ── Confidence ── */
.confidence-row { display: flex; gap: 12px; flex-wrap: wrap }
.emoji-btn {
  border: 1px solid var(--line); padding: 14px 18px; border-radius: 18px;
  background: rgba(255,255,255,.04); font-size: 1rem; font-weight: 900;
  cursor: pointer; color: var(--text); transition: .15s ease;
}
.emoji-btn:hover { background: rgba(255,255,255,.08) }
.emoji-btn.active { background: linear-gradient(135deg, var(--purple), var(--hot)); border-color: transparent }

/* ── Timeline ── */
.timeline-card { display: flex; flex-direction: column; gap: 8px }
.timeline-chip {
  display: inline-flex; width: max-content; padding: 8px 12px; border-radius: 999px;
  background: rgba(94,230,255,.10); border: 1px solid rgba(94,230,255,.14);
  font-weight: 900; font-size: .85rem; color: var(--cyan);
}

/* ── Stat row (landing) ── */
.stat-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; margin-top: 26px }
.stat {
  padding: 18px; border: 1px solid var(--line); border-radius: 20px;
  background: rgba(255,255,255,.04); box-shadow: var(--shadow);
}
.stat .big { font-size: 1.5rem; font-weight: 900 }

/* ── Roadmap ── */
.roadmap-step {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 14px 0; border-bottom: 1px dashed rgba(255,255,255,.10);
}
.roadmap-step:last-child { border-bottom: 0 }
.step-num {
  min-width: 38px; width: 38px; height: 38px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center; font-weight: 900;
  background: linear-gradient(135deg, var(--purple), var(--hot)); flex-shrink: 0;
}

/* ── Notice ── */
.notice {
  border-left: 4px solid var(--purple);
  padding: 14px 16px; border-radius: 14px;
  background: rgba(154,124,255,.08);
}

/* ── Sources ── */
.source-list a { color: var(--cyan); text-decoration: underline }

/* ── Printable ── */
.print-sheet {
  background: #fff; color: #13213a; border-radius: 26px; padding: 26px; box-shadow: var(--shadow);
}
.print-sheet h3 { font-size: 1.8rem; margin: 0 0 8px; color: #13213a; letter-spacing: -0.02em }
.print-sheet p, .print-sheet li { color: #35445f }
.print-box {
  border: 2px dashed #b8c7e6; border-left: 4px solid; border-left-color: inherit; border-radius: 18px; padding: 16px; margin-top: 12px; color: #13213a;
}

/* ── Footer ── */
.footer {
  color: var(--muted); background: rgba(7,12,22,.9);
  padding: 34px 0 54px; margin-top: 40px;
  border-top: 1px solid var(--line);
}
.footer a { color: var(--cyan); text-decoration: underline }
.footer strong { color: var(--text) }

/* ── Profile System ── */
.profile-setup-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(7,12,22,.92); backdrop-filter: blur(12px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.profile-setup-card {
  background: linear-gradient(180deg, #13213a, #0f1a2d);
  border: 1px solid var(--line); border-radius: 28px;
  padding: 32px; max-width: 480px; width: 100%;
  box-shadow: 0 30px 80px rgba(0,0,0,.5);
}
.profile-setup-card h2 { text-align: center; margin-bottom: 20px }
.profile-setup-card label { display: block; font-weight: 800; margin: 16px 0 8px; color: var(--gold) }
.profile-setup-card input[type="text"] {
  width: 100%; padding: 12px 16px; border-radius: 14px;
  border: 2px solid var(--line); background: rgba(255,255,255,.06);
  color: var(--text); font-size: 1rem; font-weight: 700;
}
.profile-setup-card input[type="text"]:focus {
  outline: none; border-color: var(--cyan);
}
.avatar-grid {
  display: grid; grid-template-columns: repeat(8,1fr); gap: 8px; margin-top: 8px;
}
.avatar-option {
  aspect-ratio: 1; border-radius: 14px; border: 2px solid var(--line);
  background: rgba(255,255,255,.04); display: flex; align-items: center;
  justify-content: center; font-size: 1.6rem; cursor: pointer;
  transition: .15s ease;
}
.avatar-option:hover { border-color: rgba(255,255,255,.2); background: rgba(255,255,255,.08) }
.avatar-option.selected { border-color: var(--cyan); background: rgba(94,230,255,.12); box-shadow: 0 0 16px rgba(94,230,255,.2) }
.grade-select-row {
  display: flex; gap: 10px; margin-top: 8px;
}
.grade-select-btn {
  flex: 1; padding: 12px; border-radius: 14px; border: 2px solid var(--line);
  background: rgba(255,255,255,.04); color: var(--text);
  font-weight: 900; font-size: 1.1rem; cursor: pointer; text-align: center;
  transition: .15s ease;
}
.grade-select-btn:hover { border-color: rgba(255,255,255,.2) }
.grade-select-btn.selected { border-color: var(--cyan); background: rgba(94,230,255,.12) }

/* Profile Bar */
.profile-bar {
  display: flex; align-items: center; gap: 12px; padding: 10px 16px;
  background: linear-gradient(135deg, rgba(94,230,255,.08), rgba(154,124,255,.06));
  border: 1px solid var(--line); border-radius: 999px;
  font-weight: 800; font-size: .92rem;
}
.profile-bar .avatar { font-size: 1.4rem }
.profile-bar .streak-fire { color: var(--danger); margin-left: 8px }
.profile-bar .edit-profile-btn {
  padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line);
  background: rgba(255,255,255,.06); color: var(--muted); cursor: pointer;
  font-size: .78rem; font-weight: 700; transition: .15s ease;
}
.profile-bar .edit-profile-btn:hover { background: rgba(255,255,255,.10) }

/* ── Weekly Mission Rhythm ── */
.mission-today {
  border: 2px solid var(--cyan); position: relative;
}
.mission-today::after {
  content: "TODAY"; position: absolute; top: -12px; right: 16px;
  padding: 4px 10px; border-radius: 999px;
  background: var(--cyan); color: #07111e;
  font-size: .72rem; font-weight: 900; letter-spacing: .08em;
}
.mission-icon { font-size: 2rem; margin-bottom: 8px }
.mission-card .btn { margin-top: 12px }

/* ── Boss Battle ── */
.boss-battle-timer {
  font-size: 2rem; font-weight: 900; text-align: center;
  padding: 12px; border-radius: 18px;
  background: linear-gradient(135deg, rgba(255,95,162,.12), rgba(255,143,112,.08));
  border: 1px solid rgba(255,95,162,.2);
}
.boss-battle-timer.urgent { color: var(--danger); animation: pulse .5s ease infinite alternate }
@keyframes pulse { from { opacity: 1 } to { opacity: .6 } }
.boss-result {
  text-align: center; padding: 32px;
}
.boss-result .score-big {
  font-size: 4rem; font-weight: 900; letter-spacing: -.04em;
  background: linear-gradient(135deg, var(--gold), var(--hot));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.boss-result .verdict {
  font-size: 1.4rem; font-weight: 800; margin: 12px 0;
}
.boss-breakdown { margin-top: 18px; text-align: left }
.boss-breakdown .q-row {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 0; border-bottom: 1px solid var(--line);
}
.boss-breakdown .q-correct { color: var(--lime) }
.boss-breakdown .q-wrong { color: var(--danger) }

/* ── Streak Display ── */
.streak-display {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px; border-radius: 18px;
  background: linear-gradient(135deg, rgba(255,143,112,.10), rgba(255,209,102,.08));
  border: 1px solid rgba(255,209,102,.14);
}
.streak-display .streak-num {
  font-size: 1.8rem; font-weight: 900; color: var(--gold);
}
.streak-display .streak-label {
  font-weight: 700; color: var(--muted);
}

/* ── Confetti ── */
@keyframes confettiFall {
  0% { transform: translateY(-10vh) rotate(0deg); opacity: 1 }
  100% { transform: translateY(110vh) rotate(720deg); opacity: 0 }
}
.confetti-piece {
  position: fixed; z-index: 200; pointer-events: none;
  width: 10px; height: 10px; border-radius: 2px;
}

/* ── Upgraded Parent Dashboard ── */
.parent-header {
  display: flex; align-items: center; gap: 16px;
  padding: 20px; border-radius: 20px;
  background: linear-gradient(135deg, rgba(94,230,255,.08), rgba(154,124,255,.06));
  border: 1px solid var(--line); margin-bottom: 18px;
}
.parent-header .p-avatar { font-size: 3rem }
.parent-header .p-info h3 { margin: 0 }
.parent-header .p-info .p-meta { color: var(--muted); font-size: .9rem }
.skill-bar-row {
  display: flex; align-items: center; gap: 12px; padding: 8px 0;
}
.skill-bar-label { width: 100px; font-weight: 700; font-size: .9rem }
.skill-bar-track {
  flex: 1; height: 12px; background: rgba(255,255,255,.08);
  border-radius: 999px; overflow: hidden;
}
.skill-bar-fill {
  height: 100%; border-radius: 999px;
  transition: width .3s ease;
}
.skill-bar-fill.reading { background: linear-gradient(90deg, var(--cyan), var(--blue)) }
.skill-bar-fill.math { background: linear-gradient(90deg, var(--gold), var(--danger)) }
.skill-bar-fill.mixed { background: linear-gradient(90deg, var(--purple), var(--hot)) }
.skill-bar-fill.science { background: linear-gradient(90deg, var(--lime), var(--teal)) }
.skill-health {
  display: inline-flex; padding: 4px 10px; border-radius: 999px;
  font-size: .78rem; font-weight: 800;
}
.skill-health.strong { background: rgba(156,255,87,.12); color: var(--lime) }
.skill-health.improving { background: rgba(255,209,102,.12); color: var(--gold) }
.skill-health.needs-work { background: rgba(255,95,162,.12); color: var(--hot) }
.activity-table { width: 100%; border-collapse: collapse; margin-top: 12px }
.activity-table th { text-align: left; padding: 10px; color: var(--gold); font-size: .82rem; text-transform: uppercase; letter-spacing: .08em }
.activity-table td { padding: 10px; border-bottom: 1px solid var(--line); font-size: .9rem }
.next-action {
  padding: 16px; border-radius: 18px; margin-top: 18px;
  background: linear-gradient(135deg, rgba(94,230,255,.10), rgba(154,124,255,.08));
  border: 1px solid rgba(94,230,255,.14);
}
.next-action .action-title { font-weight: 900; color: var(--cyan); margin-bottom: 6px }

/* ── Flashcard Lab ── */
.flashcard-container { perspective: 1000px; cursor: pointer; margin: 0 auto; max-width: 560px }
.flashcard { position: relative; width: 100%; min-height: 260px; transition: transform 0.5s; transform-style: preserve-3d }
.flashcard.flipped { transform: rotateY(180deg) }
.flashcard-container:active .flashcard { transform: scale(0.98) }
.flashcard-container:active .flashcard.flipped { transform: rotateY(180deg) scale(0.98) }
.flashcard-face { position: absolute; inset: 0; backface-visibility: hidden; border-radius: 20px; padding: 28px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; border: 2px solid var(--line); background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.02)), linear-gradient(180deg, rgba(154,124,255,.06), rgba(94,230,255,.03)); box-shadow: var(--shadow) }
.flashcard-back { transform: rotateY(180deg) }
.flashcard-prompt { font-size: 1.4rem; font-weight: 800; line-height: 1.4; letter-spacing: -0.01em }
.flashcard-answer { font-size: 1.3rem; font-weight: 800; color: var(--cyan) }
.flashcard-hint { font-size: .9rem; color: var(--gold); margin-top: 12px; font-style: italic }
.flashcard-category { font-size: .75rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-top: 12px; background: rgba(255,255,255,.06); padding: 4px 10px; border-radius: 999px; display: inline-block }
.flashcard-nav { display: flex; gap: 10px; justify-content: center; margin-top: 16px }
.flashcard-confidence { display: flex; gap: 10px; justify-content: center; margin-top: 12px }
.flashcard-deck-pills { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px }
.flashcard-counter { text-align: center; margin-top: 10px; font-weight: 700; color: var(--muted) }
@media (max-width: 600px) { .flashcard { min-height: 220px } .flashcard-prompt { font-size: 1.1rem } }

/* ── Print styles ── */
.print-only { display: none }
@media print {
  .topbar, .cta-row, .hero-actions, .nav-links, .btn, .footer,
  .subject-tabs, .toggle-answer, .no-print { display: none !important }
  body { background: #fff; color: #111 }
  .card, .panel, .feature-card, .lesson-card, .stat-card, .mission-card,
  .question-card, .mini-card, .cheat, .countdown-box, .badge {
    box-shadow: none; border: 1px solid #ccc; background: #fff; color: #111;
  }
  h1, h2, h3, h4, .kpi, .lead, .muted, .small, .kicker { color: #111 }
  .section { padding: 10px 0 }
  .print-only { display: block }
}

/* ── Responsive ── */
@media (max-width: 980px) {
  .hero-grid, .grid-3, .grid-4, .grid-2, .grade-cards,
  .practice-layout, .badge-grid, .cheat-grid, .stat-row { grid-template-columns: 1fr }
  .sidebar-stack { position: relative; top: auto }
  .countdown-grid { grid-template-columns: repeat(2,1fr) }
  .hero { padding: 44px 0 32px }
}
@media (max-width: 768px) {
  .grade-cards { grid-template-columns: repeat(2, 1fr) }
  .grade-cards[style*="repeat(3"] { grid-template-columns: repeat(2, 1fr) !important }
  .grade-cards[style*="repeat(7"] { grid-template-columns: repeat(4, 1fr) !important }
  .hero-visual { min-height: 300px }
  .stat-row { grid-template-columns: 1fr 1fr }
  .practice-layout { grid-template-columns: 1fr }
  .nav-links { gap: 6px }
  .nav-links a { padding: 8px 10px; font-size: .82rem }
  .split { grid-template-columns: 1fr }
}
@media (max-width: 600px) {
  .grade-cards { grid-template-columns: 1fr !important }
  .grade-cards[style*="repeat(7"] { grid-template-columns: repeat(3, 1fr) !important }
  .hero { padding: 32px 0 24px }
  h1 { font-size: 1.8rem }
  .hero p { font-size: .95rem }
  .btn { padding: 12px 16px; font-size: .88rem }
  .cta-row { gap: 8px }
  .stat-row { grid-template-columns: 1fr }
  .stat .big { font-size: 1.2rem }
  .feature-card { padding: 16px }
  .feature-icon { width: 44px; height: 44px; font-size: 1.2rem }
  .countdown-grid { grid-template-columns: repeat(2, 1fr) }
  .countdown-box .num { font-size: 1.5rem }
  .badge-grid { grid-template-columns: repeat(2, 1fr) }
  .cheat-grid { grid-template-columns: 1fr }
  .brand { font-size: .9rem }
  .brand small { font-size: .7rem }
  .topbar { position: sticky }
  .nav { flex-wrap: wrap; gap: 8px }
  .nav-links { width: 100%; justify-content: center }
  .footer { padding: 24px 0 40px; font-size: .9rem }
  .profile-bar { flex-wrap: wrap; gap: 8px }
  .mega-link { flex-direction: column; text-align: center }
  .avatar-grid { grid-template-columns: repeat(4, 1fr) }
  .grade-select-row { flex-wrap: wrap }
  .profile-bar { font-size: .82rem; padding: 8px 12px }
}

/* Touch-friendly */
@media (hover: none) {
  .btn { min-height: 44px }
  .option { min-height: 48px }
  .pill { min-height: 40px }
  .nav-links a { min-height: 40px }
  .emoji-btn { min-height: 44px }
  .subject-tab { min-height: 44px }
}

/* ── Pretty lists ── */
ul.pretty { padding-left: 18px; color: var(--muted); line-height: 1.8 }
ul.pretty li { margin-bottom: 4px }
ul.pretty li strong { color: var(--text) }

/* ── Mega link ── */
.mega-link {
  display: flex; justify-content: space-between; align-items: center; gap: 18px;
  padding: 22px; border-radius: var(--radius); border: 1px solid var(--line);
  background: rgba(255,255,255,.04);
}
.mega-link strong { font-size: 1.15rem }

/* ── Sparkle badge ── */
.sparkle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 14px;
  background: linear-gradient(135deg, var(--gold), #ff9f5a);
  color: #1b1620; font-weight: 900;
}

/* ── Banner ── */
.banner {
  padding: 26px; border-radius: 28px; border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(255,95,162,.12), rgba(94,230,255,.10), rgba(255,209,102,.08));
  box-shadow: var(--shadow);
}
.quote { font-size: 1.15rem; font-weight: 800; line-height: 1.5 }

/* ── Split layout ── */
.split {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 18px; align-items: stretch;
}
@media (max-width: 980px) { .split { grid-template-columns: 1fr } }

/* ── Coming Soon badge ── */
.coming-soon {
  display: inline-flex; padding: 6px 12px; border-radius: 999px;
  background: rgba(255,209,102,.12); border: 1px solid rgba(255,209,102,.20);
  color: var(--gold); font-weight: 800; font-size: .78rem;
}