:root {
  --bg: #07111d;
  --bg-deep: #040a12;
  --panel: rgba(14, 28, 44, .82);
  --panel-solid: #0e1b2a;
  --panel-2: #122438;
  --text: #edf4f7;
  --muted: #91a4b5;
  --line: rgba(164, 194, 214, .16);
  --accent: #63d7c6;
  --accent-2: #e7c66c;
  --danger: #ff7f84;
  --success: #67df9a;
  --shadow: 0 24px 70px rgba(0, 0, 0, .35);
  --radius: 20px;
  --ease: cubic-bezier(.2,.8,.2,1);
}

html[data-theme="light"] {
  --bg: #eef3f5;
  --bg-deep: #e3eaed;
  --panel: rgba(255, 255, 255, .88);
  --panel-solid: #ffffff;
  --panel-2: #f2f6f7;
  --text: #142534;
  --muted: #607384;
  --line: rgba(20, 52, 71, .14);
  --accent: #087f74;
  --accent-2: #9a7418;
  --danger: #c43f4b;
  --success: #167a45;
  --shadow: 0 20px 55px rgba(28, 57, 75, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--text);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}
button, input { font: inherit; }
button { color: inherit; }
a { color: var(--accent); }
.hidden { display: none !important; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 100; transform: translateY(-180%); padding: 10px 14px; background: var(--text); color: var(--bg); border-radius: 8px; }
.skip-link:focus { transform: translateY(0); }
.ambient {
  position: fixed; inset: 0; pointer-events: none; z-index: -1;
  background:
    radial-gradient(circle at 78% 4%, rgba(51, 185, 172, .12), transparent 28%),
    radial-gradient(circle at 10% 42%, rgba(73, 116, 184, .10), transparent 26%),
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(255,255,255,.018) 80px),
    repeating-linear-gradient(0deg, transparent 0 79px, rgba(255,255,255,.014) 80px);
}
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; justify-content: space-between; align-items: center;
  min-height: 72px; padding: 0 clamp(18px, 4vw, 64px);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--line); backdrop-filter: blur(18px);
}
.brand { display: flex; gap: 11px; align-items: center; padding: 0; border: 0; background: none; cursor: pointer; text-align: left; }
.brand-mark { display: grid; place-items: center; width: 36px; height: 36px; border: 1px solid var(--accent); color: var(--accent); font: 700 17px ui-monospace, SFMono-Regular, Menlo, monospace; transform: rotate(-6deg); }
.brand strong { display: block; font-size: 15px; letter-spacing: .06em; }
.brand small { display: block; margin-top: -2px; color: var(--muted); font-size: 9px; letter-spacing: .19em; }
.top-actions { display: flex; align-items: center; gap: 12px; }
.sync-status { color: var(--muted); font-size: 12px; }
.sync-status i { display: inline-block; width: 6px; height: 6px; margin-right: 6px; background: var(--success); border-radius: 99px; box-shadow: 0 0 10px var(--success); }
.icon-button, .text-button { min-height: 42px; border: 1px solid var(--line); background: var(--panel); border-radius: 12px; cursor: pointer; }
.icon-button { width: 42px; }
.text-button { padding: 0 14px; }
.icon-button:hover, .text-button:hover { border-color: color-mix(in srgb, var(--accent) 55%, var(--line)); transform: translateY(-1px); }
#app { width: min(1440px, 100%); margin: 0 auto; padding: clamp(26px, 5vw, 72px) clamp(18px, 4vw, 64px) 80px; }

.eyebrow { margin: 0 0 12px; color: var(--accent); font: 700 11px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .18em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 820px; margin-bottom: 18px; font-size: clamp(38px, 7vw, 82px); line-height: .98; letter-spacing: -.055em; }
h2 { font-size: clamp(25px, 3vw, 38px); line-height: 1.08; letter-spacing: -.035em; }
h3 { line-height: 1.18; }
.lede { max-width: 700px; margin-bottom: 0; color: var(--muted); font-size: clamp(16px, 1.6vw, 20px); }
.hero { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(300px, .75fr); gap: 34px; align-items: end; margin-bottom: 48px; }
.hero-copy { padding: 26px 0; }
.hero-copy h1 em { color: var(--accent); font-style: normal; }
.journey-card { position: relative; overflow: hidden; padding: 24px; border: 1px solid var(--line); background: linear-gradient(145deg, var(--panel), color-mix(in srgb, var(--panel-solid) 85%, var(--accent) 15%)); border-radius: var(--radius); box-shadow: var(--shadow); }
.journey-card::before { content: ""; position: absolute; inset: 0 0 auto; height: 3px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.journey-meta { display: flex; justify-content: space-between; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .1em; }
.level-line { display: flex; align-items: baseline; gap: 10px; margin: 18px 0 12px; }
.level-line strong { font-size: 46px; line-height: 1; }
.level-line span { color: var(--muted); }
.progress-track { overflow: hidden; height: 7px; background: color-mix(in srgb, var(--text) 8%, transparent); border-radius: 99px; }
.progress-track i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: inherit; transition: width .5s var(--ease); }
.progress-caption { display: flex; justify-content: space-between; margin-top: 9px; color: var(--muted); font-size: 12px; }

.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 30px; }
.metric { padding: 20px; border: 1px solid var(--line); background: var(--panel); border-radius: 16px; }
.metric span { display: block; color: var(--muted); font-size: 12px; letter-spacing: .04em; }
.metric strong { display: block; margin-top: 8px; font-size: clamp(24px, 3vw, 38px); line-height: 1; }
.metric small { color: var(--muted); }

.daily-card { display: grid; grid-template-columns: 70px 1fr auto; gap: 20px; align-items: center; margin: 0 0 48px; padding: 22px; border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--line)); background: linear-gradient(110deg, color-mix(in srgb, var(--panel-solid) 88%, var(--accent) 12%), var(--panel)); border-radius: var(--radius); }
.daily-time { display: grid; place-items: center; width: 64px; height: 64px; border: 1px solid var(--accent); border-radius: 50%; color: var(--accent); font: 700 15px ui-monospace, SFMono-Regular, monospace; }
.daily-card h2 { margin-bottom: 6px; font-size: 22px; letter-spacing: -.02em; }
.daily-card p { margin-bottom: 0; color: var(--muted); }
.foundation-card { display: grid; grid-template-columns: minmax(0,1fr) 180px auto; gap: 24px; align-items: center; margin: 0 0 48px; padding: 26px; border: 1px solid color-mix(in srgb, var(--accent-2) 45%, var(--line)); background: linear-gradient(120deg, color-mix(in srgb, var(--panel-solid) 90%, var(--accent-2) 10%), var(--panel)); border-radius: var(--radius); }
.foundation-card h2 { margin-bottom: 8px; font-size: 27px; }
.foundation-card p { margin-bottom: 0; color: var(--muted); }
.foundation-progress strong { display: block; font-size: 30px; }
.foundation-progress span { display: block; margin-bottom: 9px; color: var(--muted); font-size: 12px; }
.primary-button { min-height: 46px; padding: 0 18px; border: 0; background: var(--accent); color: var(--bg-deep); border-radius: 12px; font-weight: 800; cursor: pointer; transition: transform .2s var(--ease), box-shadow .2s var(--ease); }
.primary-button:hover { transform: translateY(-2px); box-shadow: 0 12px 28px color-mix(in srgb, var(--accent) 25%, transparent); }
.primary-button:disabled { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }

.section-heading { display: flex; justify-content: space-between; gap: 20px; align-items: end; margin-bottom: 18px; }
.section-heading h2 { margin-bottom: 0; }
.section-heading p { max-width: 480px; margin-bottom: 3px; color: var(--muted); font-size: 14px; }
.sector-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.sector-card { position: relative; overflow: hidden; min-height: 280px; padding: 22px; border: 1px solid var(--line); background: var(--panel); border-radius: var(--radius); cursor: pointer; text-align: left; transition: transform .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease); }
.sector-card::after { content: ""; position: absolute; right: -40px; bottom: -50px; width: 150px; height: 150px; background: radial-gradient(circle, color-mix(in srgb, var(--sector) 20%, transparent), transparent 68%); }
.sector-card:hover, .sector-card:focus-visible { transform: translateY(-5px); border-color: color-mix(in srgb, var(--sector) 58%, var(--line)); box-shadow: var(--shadow); }
.sector-card.wide { grid-column: span 2; }
.sector-top { display: flex; justify-content: space-between; align-items: flex-start; }
.sector-index { color: var(--muted); font: 12px ui-monospace, SFMono-Regular, monospace; }
.sector-monogram { display: grid; place-items: center; width: 44px; height: 44px; border: 1px solid color-mix(in srgb, var(--sector) 65%, transparent); color: var(--sector); border-radius: 12px; font: 700 13px ui-monospace, SFMono-Regular, monospace; }
.sector-card h3 { max-width: 260px; margin: 38px 0 7px; font-size: 24px; letter-spacing: -.03em; }
.sector-card p { max-width: 320px; color: var(--muted); font-size: 14px; }
.sector-progress { position: absolute; right: 22px; bottom: 22px; left: 22px; }
.sector-progress span { display: flex; justify-content: space-between; margin-bottom: 8px; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; }
.sector-progress i { background: var(--sector); }

.badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 44px; padding-top: 25px; border-top: 1px solid var(--line); }
.badge { display: inline-flex; gap: 8px; align-items: center; padding: 9px 12px; border: 1px solid var(--line); background: var(--panel); border-radius: 99px; color: var(--muted); font-size: 12px; }
.badge.unlocked { color: var(--text); border-color: color-mix(in srgb, var(--accent-2) 45%, var(--line)); }
.badge b { color: var(--accent-2); }
.reset-zone { margin-top: 22px; text-align: right; }
.reset-button { border: 0; background: none; color: var(--muted); font-size: 12px; text-decoration: underline; cursor: pointer; }

.sector-hero { position: relative; overflow: hidden; display: grid; grid-template-columns: 1.25fr .75fr; gap: 30px; align-items: end; margin-bottom: 28px; padding: clamp(24px, 5vw, 54px); border: 1px solid var(--line); background: linear-gradient(130deg, var(--panel-solid), color-mix(in srgb, var(--panel-solid) 82%, var(--sector) 18%)); border-radius: 28px; }
.sector-hero::after { content: attr(data-monogram); position: absolute; right: -2vw; bottom: -8vw; color: color-mix(in srgb, var(--sector) 10%, transparent); font-weight: 900; font-size: clamp(160px, 26vw, 360px); line-height: 1; }
.sector-hero h1 { position: relative; z-index: 1; margin-bottom: 12px; font-size: clamp(42px, 6vw, 76px); }
.sector-hero .lede { position: relative; z-index: 1; }
.sector-score { position: relative; z-index: 1; padding: 22px; border: 1px solid color-mix(in srgb, var(--sector) 40%, var(--line)); background: color-mix(in srgb, var(--panel-solid) 75%, transparent); border-radius: 18px; backdrop-filter: blur(8px); }
.sector-score strong { display: block; font-size: 46px; }
.sector-score span { color: var(--muted); }

.tabs { position: sticky; top: 84px; z-index: 30; display: flex; gap: 7px; overflow-x: auto; margin-bottom: 24px; padding: 7px; border: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 80%, transparent); border-radius: 15px; backdrop-filter: blur(16px); }
.tab { flex: 1 0 auto; min-height: 42px; padding: 0 14px; border: 0; background: transparent; border-radius: 10px; color: var(--muted); cursor: pointer; }
.tab.active { background: var(--panel-2); color: var(--text); box-shadow: inset 0 0 0 1px var(--line); }
.tab-panel { animation: panelIn .3s var(--ease); }
@keyframes panelIn { from { opacity: 0; transform: translateY(10px); } }

.lesson-list { display: grid; gap: 16px; }
.lesson-card { overflow: hidden; border: 1px solid var(--line); background: var(--panel); border-radius: var(--radius); }
.lesson-card.completed { border-color: color-mix(in srgb, var(--success) 40%, var(--line)); }
.lesson-summary { display: grid; grid-template-columns: 48px 1fr auto; gap: 16px; align-items: center; width: 100%; padding: 21px; border: 0; background: none; cursor: pointer; text-align: left; }
.lesson-no { display: grid; place-items: center; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 12px; color: var(--sector); font: 700 12px ui-monospace, SFMono-Regular, monospace; }
.lesson-summary h3 { margin-bottom: 3px; font-size: 18px; }
.lesson-summary p { margin-bottom: 0; color: var(--muted); font-size: 13px; }
.lesson-state { color: var(--muted); font-size: 13px; }
.lesson-body { display: none; padding: 0 22px 24px 86px; }
.lesson-card.open .lesson-body { display: block; }
.lesson-body > p { max-width: 82ch; color: var(--muted); }
.why-box { margin: 18px 0; padding: 16px 18px; border-left: 3px solid var(--sector); background: color-mix(in srgb, var(--sector) 8%, var(--panel-2)); border-radius: 0 12px 12px 0; }
.why-box strong { display: block; margin-bottom: 4px; color: var(--sector); font-size: 12px; text-transform: uppercase; letter-spacing: .1em; }
.chain { display: flex; gap: 8px; align-items: stretch; overflow-x: auto; margin: 20px 0; padding-bottom: 8px; }
.chain-step { position: relative; flex: 1 0 145px; min-height: 78px; display: flex; align-items: center; padding: 13px; border: 1px solid var(--line); background: var(--panel-2); border-radius: 12px; font-size: 13px; font-weight: 650; }
.chain-step:not(:last-child)::after { content: "→"; position: absolute; right: -9px; z-index: 2; color: var(--sector); }
.data-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 16px 0 20px; }
.data-card { padding: 16px; border: 1px solid var(--line); background: var(--panel-2); border-radius: 14px; }
.data-card b { display: block; margin-bottom: 7px; font-size: 14px; }
.data-card p { margin-bottom: 5px; color: var(--muted); font-size: 13px; }
.data-card small { color: var(--sector); }
.table-wrap { overflow-x: auto; margin: 16px 0 22px; border: 1px solid var(--line); border-radius: 14px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { padding: 12px 14px; background: var(--panel-2); color: var(--muted); font-size: 11px; letter-spacing: .06em; text-align: left; text-transform: uppercase; }
td { min-width: 150px; padding: 12px 14px; border-top: 1px solid var(--line); vertical-align: top; }
.module-stack { display: grid; gap: 10px; }
.module-row { padding: 15px; border: 1px solid var(--line); border-radius: 13px; }
.module-row h4 { margin: 0 0 5px; }
.module-row p { margin: 0; color: var(--muted); font-size: 13px; }
.complete-button { min-height: 44px; margin-top: 18px; padding: 0 16px; border: 1px solid var(--sector); background: transparent; color: var(--sector); border-radius: 11px; font-weight: 750; cursor: pointer; }
.complete-button.done { border-color: var(--success); color: var(--success); }

.flash-intro, .quiz-intro, .source-intro { margin-bottom: 22px; }
.flash-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; perspective: 1200px; }
.flashcard { position: relative; min-height: 210px; padding: 0; border: 0; background: transparent; cursor: pointer; text-align: left; transform-style: preserve-3d; transition: transform .55s var(--ease); }
.flashcard.flipped { transform: rotateY(180deg); }
.flash-face { position: absolute; inset: 0; padding: 22px; border: 1px solid var(--line); background: var(--panel-solid); border-radius: 18px; backface-visibility: hidden; }
.flash-back { transform: rotateY(180deg); background: color-mix(in srgb, var(--panel-solid) 90%, var(--sector) 10%); }
.flash-face small { color: var(--sector); font: 11px ui-monospace, SFMono-Regular, monospace; letter-spacing: .1em; }
.flash-face strong { display: block; margin-top: 42px; font-size: 22px; }
.flash-back p { margin: 26px 0 0; color: var(--muted); }

.quiz-group { margin: 30px 0; }
.quiz-group-title { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; }
.quiz-group-title span { padding: 5px 9px; background: var(--panel-2); border: 1px solid var(--line); border-radius: 7px; color: var(--muted); font: 10px ui-monospace, SFMono-Regular, monospace; letter-spacing: .1em; }
.quiz-card { margin-bottom: 14px; padding: 22px; border: 1px solid var(--line); background: var(--panel); border-radius: 18px; }
.quiz-card.correct { border-color: color-mix(in srgb, var(--success) 50%, var(--line)); }
.quiz-card h3 { font-size: 17px; }
.options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 9px; }
.option { min-height: 48px; padding: 11px 13px; border: 1px solid var(--line); background: var(--panel-2); border-radius: 11px; cursor: pointer; text-align: left; font-size: 13px; }
.option:hover { border-color: var(--sector); }
.option.selected.wrong { border-color: var(--danger); color: var(--danger); }
.option.selected.correct, .option.answer { border-color: var(--success); color: var(--success); }
.option:disabled { cursor: default; }
.feedback { margin-top: 14px; padding: 13px 15px; border-left: 3px solid var(--danger); background: color-mix(in srgb, var(--danger) 7%, transparent); color: var(--muted); border-radius: 0 10px 10px 0; font-size: 13px; }
.feedback.good { border-left-color: var(--success); background: color-mix(in srgb, var(--success) 7%, transparent); }
.feedback strong { color: var(--text); }
.locked-block { padding: 28px; border: 1px dashed var(--line); border-radius: 17px; color: var(--muted); text-align: center; }

.source-list { display: grid; gap: 9px; }
.source-item { display: grid; grid-template-columns: 54px 1fr auto; gap: 12px; align-items: center; padding: 13px 15px; border: 1px solid var(--line); background: var(--panel); border-radius: 12px; text-decoration: none; }
.source-item:hover { border-color: var(--accent); }
.source-code { color: var(--accent); font: 11px ui-monospace, SFMono-Regular, monospace; }
.source-title { color: var(--text); font-size: 13px; }
.source-arrow { color: var(--muted); }
.source-note { margin-top: 18px; color: var(--muted); font-size: 12px; }

.toast { position: fixed; right: 22px; bottom: 22px; z-index: 100; max-width: 340px; padding: 13px 16px; background: var(--text); color: var(--bg-deep); border-radius: 12px; box-shadow: var(--shadow); opacity: 0; transform: translateY(18px); pointer-events: none; transition: .25s var(--ease); font-weight: 700; font-size: 13px; }
.toast.show { opacity: 1; transform: translateY(0); }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 60%, transparent); outline-offset: 3px; }

@media (max-width: 1000px) {
  .hero, .sector-hero { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .sector-grid { grid-template-columns: repeat(2, 1fr); }
  .sector-card.wide { grid-column: auto; }
  .flash-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 700px) {
  .topbar { min-height: 64px; }
  .sync-status { display: none; }
  #app { padding-top: 28px; }
  .hero { margin-bottom: 32px; }
  .metrics, .sector-grid, .data-grid, .flash-grid, .options { grid-template-columns: 1fr; }
  .daily-card { grid-template-columns: 58px 1fr; }
  .foundation-card { grid-template-columns: 1fr; }
  .daily-time { width: 54px; height: 54px; }
  .daily-card .primary-button { grid-column: 1 / -1; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 8px; }
  .sector-card { min-height: 250px; }
  .sector-hero { padding: 26px 22px; }
  .tabs { top: 70px; margin-right: -4px; margin-left: -4px; }
  .lesson-summary { grid-template-columns: 42px 1fr; padding: 17px; }
  .lesson-state { grid-column: 2; }
  .lesson-body { padding: 0 17px 20px; }
  .source-item { grid-template-columns: 44px 1fr; }
  .source-arrow { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}