:root {
  --bg: #07101d;
  --surface: #0d1828;
  --surface-2: #132238;
  --surface-3: #172a43;
  --line: rgba(255,255,255,.09);
  --text: #eef5ff;
  --muted: #99aac0;
  --accent: #59d0c9;
  --accent-2: #7aa8ff;
  --warning: #ffcc66;
  --danger: #ff7d7d;
  --good: #66d19e;
  --shadow: 0 18px 50px rgba(0,0,0,.28);
  --radius: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 80% 10%, rgba(73, 145, 255, .12), transparent 28%),
    radial-gradient(circle at 20% 90%, rgba(74, 210, 194, .09), transparent 34%),
    var(--bg);
  font-family: Inter, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
}
button, input, select { font: inherit; }
button { color: inherit; }
a { color: var(--accent); }

.app-shell { min-height: 100vh; display: grid; grid-template-columns: 260px 1fr; }
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid var(--line);
  background: rgba(7,16,29,.92);
  backdrop-filter: blur(20px);
  padding: 26px 18px;
  display: flex;
  flex-direction: column;
  z-index: 30;
}
.brand { display: flex; gap: 12px; align-items: center; margin: 0 8px 34px; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 13px;
  display: grid; place-items: center; font-weight: 900; letter-spacing: -.04em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #06111d;
}
.brand strong { display: block; font-size: 15px; }
.brand span { display: block; color: var(--muted); font-size: 11px; margin-top: 3px; }
.nav-list { display: grid; gap: 6px; }
.nav-item {
  border: 0; background: transparent; color: var(--muted); text-align: left;
  padding: 12px 14px; border-radius: 12px; cursor: pointer; display: flex; gap: 12px; align-items: center;
}
.nav-item span { width: 18px; text-align: center; }
.nav-item:hover, .nav-item.active { background: var(--surface-2); color: var(--text); }
.nav-item.active { box-shadow: inset 3px 0 0 var(--accent); }
.sidebar-note {
  margin-top: auto; padding: 16px; border: 1px solid var(--line); border-radius: 14px;
  background: linear-gradient(145deg, rgba(89,208,201,.08), rgba(122,168,255,.04));
}
.sidebar-note strong { font-size: 12px; }
.sidebar-note p { color: var(--muted); font-size: 11px; line-height: 1.7; margin: 8px 0 0; }

.main-content { min-width: 0; }
.topbar {
  min-height: 92px; padding: 18px 34px; display: flex; align-items: center; gap: 18px; justify-content: space-between;
  border-bottom: 1px solid var(--line); background: rgba(7,16,29,.7); backdrop-filter: blur(18px); position: sticky; top: 0; z-index: 20;
}
.topbar-title h1 { margin: 3px 0 0; font-size: clamp(20px, 2vw, 28px); letter-spacing: -.035em; }
.eyebrow { color: var(--accent); font-size: 10px; font-weight: 800; letter-spacing: .16em; }
.topbar-actions { display: flex; gap: 10px; align-items: center; }
.freshness-badge, .status-badge {
  border: 1px solid var(--line); background: var(--surface); color: var(--muted); border-radius: 999px; padding: 8px 11px; font-size: 11px;
}
.toggle-button, .button {
  border: 1px solid var(--line); background: var(--surface-2); border-radius: 11px; padding: 10px 14px; cursor: pointer;
}
.toggle-button[aria-pressed="true"] { border-color: rgba(89,208,201,.4); color: var(--accent); }
.icon-button { border: 1px solid var(--line); background: var(--surface); border-radius: 10px; width: 42px; height: 42px; cursor: pointer; }
.mobile-only { display: none; }

.page { display: none; padding: 30px 34px 70px; max-width: 1480px; margin: 0 auto; }
.active-page { display: block; animation: fade .22s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: none; } }

.hero {
  border: 1px solid var(--line); border-radius: 26px; padding: clamp(24px, 4vw, 52px); overflow: hidden; position: relative;
  background: linear-gradient(135deg, rgba(89,208,201,.13), rgba(23,42,67,.65) 50%, rgba(122,168,255,.10));
  box-shadow: var(--shadow);
}
.hero::after { content: ""; position: absolute; width: 380px; height: 380px; border-radius: 50%; right: -150px; top: -190px; border: 55px solid rgba(255,255,255,.025); }
.hero-grid { display: grid; grid-template-columns: minmax(0,1.25fr) minmax(280px,.75fr); gap: 34px; align-items: center; }
.hero h2 { font-size: clamp(30px, 4vw, 54px); line-height: 1.12; margin: 12px 0 18px; letter-spacing: -.055em; max-width: 820px; }
.hero p { color: #bdcadb; max-width: 720px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.button.primary { background: linear-gradient(135deg, var(--accent), #8ae3d7); color: #05111c; border: 0; font-weight: 800; }
.button.secondary { background: transparent; }

.section-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin: 40px 0 16px; }
.section-head h2, .section-head h3 { margin: 0; letter-spacing: -.035em; }
.section-head p { margin: 5px 0 0; color: var(--muted); font-size: 13px; }

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.card {
  border: 1px solid var(--line); background: rgba(13,24,40,.82); border-radius: var(--radius); padding: 20px; box-shadow: 0 8px 30px rgba(0,0,0,.12);
}
.card.compact { padding: 16px; }
.card h3, .card h4 { margin: 0; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.micro { font-size: 10px; }

.metric-card { min-height: 154px; display: flex; flex-direction: column; justify-content: space-between; position: relative; overflow: hidden; }
.metric-card::after { content: ""; position: absolute; width: 90px; height: 90px; right: -30px; bottom: -40px; border-radius: 50%; background: rgba(89,208,201,.06); }
.metric-label { color: var(--muted); font-size: 12px; }
.metric-value { font-size: 30px; font-weight: 850; letter-spacing: -.04em; margin: 10px 0; }
.metric-foot { display: flex; justify-content: space-between; gap: 10px; align-items: center; font-size: 11px; color: var(--muted); }
.delta.up { color: var(--good); }
.delta.down { color: var(--danger); }
.delta.neutral { color: var(--warning); }

.progress-wrap { margin-top: 18px; }
.progress-row { display: flex; justify-content: space-between; color: var(--muted); font-size: 12px; margin-bottom: 8px; }
.progress-track { height: 8px; background: rgba(255,255,255,.06); border-radius: 999px; overflow: hidden; }
.progress-bar { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: inherit; }

.illustration-card { display: grid; place-items: center; min-height: 310px; }
.illustration-card svg { width: 100%; max-width: 420px; height: auto; }

.lesson-toolbar { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; }
.search-input, .select-input {
  color: var(--text); background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; outline: none;
}
.search-input { min-width: min(100%, 320px); flex: 1; }
.search-input:focus, .select-input:focus { border-color: var(--accent); }
.lesson-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
.lesson-card { cursor: pointer; transition: .2s ease; min-height: 240px; display: flex; flex-direction: column; }
.lesson-card:hover { transform: translateY(-3px); border-color: rgba(89,208,201,.35); }
.lesson-number { color: var(--accent); font-weight: 900; font-size: 11px; letter-spacing: .12em; }
.lesson-icon { margin: 20px 0 14px; height: 72px; }
.lesson-icon svg { width: 100%; height: 72px; }
.lesson-card h3 { font-size: 18px; }
.lesson-card p { color: var(--muted); line-height: 1.65; font-size: 12px; }
.lesson-meta { margin-top: auto; display: flex; justify-content: space-between; font-size: 10px; color: var(--muted); }

.lesson-detail { display: none; }
.lesson-detail.active { display: block; }
.back-button { margin-bottom: 16px; }
.lesson-hero { display: grid; grid-template-columns: 1.1fr .9fr; gap: 18px; }
.lesson-copy h2 { font-size: clamp(28px, 4vw, 46px); margin: 10px 0 16px; letter-spacing: -.05em; }
.lesson-copy p { line-height: 1.9; color: #bfcbda; }
.beginner-box { border-left: 3px solid var(--accent); padding: 14px 16px; background: rgba(89,208,201,.06); border-radius: 0 12px 12px 0; margin: 18px 0; }
.flow-steps { display: grid; gap: 10px; margin-top: 16px; }
.flow-step { display: grid; grid-template-columns: 34px 1fr; gap: 10px; align-items: start; }
.flow-step span { width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--surface-3); color: var(--accent); font-weight: 800; }
.flow-step p { margin: 5px 0 0; color: var(--muted); font-size: 13px; line-height: 1.7; }

.dashboard-head { display: grid; grid-template-columns: 1.2fr .8fr; gap: 16px; }
.bias-card { min-height: 100%; background: linear-gradient(135deg, rgba(122,168,255,.10), rgba(89,208,201,.07)); }
.bias-label { display: inline-flex; align-items: center; gap: 8px; color: var(--warning); font-weight: 800; margin-top: 12px; }
.bias-dot { width: 10px; height: 10px; border-radius: 50%; background: currentColor; box-shadow: 0 0 18px currentColor; }
.bias-card h2 { font-size: clamp(28px, 3vw, 44px); margin: 12px 0; }
.bias-card p { color: var(--muted); line-height: 1.8; }
.rate-gap { display: grid; gap: 12px; margin-top: 22px; }
.rate-row { display: grid; grid-template-columns: 82px 1fr 50px; gap: 12px; align-items: center; font-size: 12px; }
.rate-bar { height: 12px; background: rgba(255,255,255,.06); border-radius: 999px; overflow: hidden; }
.rate-fill { height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--accent-2), var(--accent)); }

.event-list { display: grid; gap: 10px; }
.event-item { display: grid; grid-template-columns: 86px 54px 1fr auto; gap: 12px; align-items: center; border-top: 1px solid var(--line); padding: 14px 0; }
.event-item:first-child { border-top: 0; }
.event-time { color: var(--muted); font-size: 11px; }
.country { font-size: 11px; font-weight: 800; }
.impact { display: inline-flex; gap: 3px; }
.impact i { width: 5px; height: 16px; border-radius: 2px; background: rgba(255,255,255,.12); }
.impact.high i { background: var(--danger); }
.impact.medium i:nth-child(-n+2) { background: var(--warning); }
.impact.low i:first-child { background: var(--good); }

.source-list { display: grid; gap: 8px; }
.source-link { display: flex; justify-content: space-between; gap: 12px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; text-decoration: none; color: var(--text); font-size: 12px; }
.source-link span:last-child { color: var(--muted); }

.scenario-builder { display: grid; grid-template-columns: .75fr 1.25fr; gap: 18px; }
.control-group { display: grid; gap: 8px; margin-bottom: 18px; }
.control-group label { font-size: 12px; color: var(--muted); }
.segmented { display: grid; grid-template-columns: repeat(3,1fr); gap: 6px; }
.segmented button { border: 1px solid var(--line); background: var(--surface); border-radius: 10px; padding: 10px 6px; font-size: 11px; cursor: pointer; }
.segmented button.selected { border-color: var(--accent); background: rgba(89,208,201,.1); color: var(--accent); }
.scenario-map { position: relative; min-height: 500px; overflow: hidden; }
.scenario-axis-x, .scenario-axis-y { position: absolute; background: rgba(255,255,255,.16); }
.scenario-axis-x { left: 8%; right: 8%; top: 50%; height: 1px; }
.scenario-axis-y { top: 8%; bottom: 8%; left: 50%; width: 1px; }
.quadrant { position: absolute; width: 42%; height: 38%; border: 1px dashed var(--line); border-radius: 16px; padding: 15px; }
.q1 { left: 54%; top: 8%; }
.q2 { left: 4%; top: 8%; }
.q3 { left: 4%; top: 54%; }
.q4 { left: 54%; top: 54%; }
.quadrant strong { display: block; margin-bottom: 7px; }
.quadrant p { color: var(--muted); font-size: 11px; line-height: 1.6; margin: 0; }
.scenario-marker { position: absolute; width: 24px; height: 24px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 10px rgba(89,208,201,.10), 0 0 30px rgba(89,208,201,.55); transform: translate(-50%,-50%); transition: .35s ease; z-index: 2; }
.axis-label { position: absolute; color: var(--muted); font-size: 10px; }
.axis-top { left: 51%; top: 2%; }
.axis-bottom { left: 51%; bottom: 2%; }
.axis-left { left: 2%; top: 51%; }
.axis-right { right: 2%; top: 51%; }

.quiz-shell { max-width: 860px; margin: 0 auto; }
.quiz-progress { display: flex; gap: 5px; margin-bottom: 22px; }
.quiz-progress span { height: 5px; background: rgba(255,255,255,.08); flex: 1; border-radius: 999px; }
.quiz-progress span.done { background: var(--accent); }
.quiz-question { font-size: clamp(23px, 3vw, 34px); line-height: 1.4; margin: 15px 0 24px; }
.answer-list { display: grid; gap: 10px; }
.answer-button { text-align: left; border: 1px solid var(--line); background: var(--surface); border-radius: 13px; padding: 16px; cursor: pointer; }
.answer-button:hover { border-color: var(--accent-2); }
.answer-button.correct { border-color: var(--good); background: rgba(102,209,158,.08); }
.answer-button.wrong { border-color: var(--danger); background: rgba(255,125,125,.08); }
.explanation { margin-top: 18px; border-left: 3px solid var(--accent); padding: 15px; background: rgba(89,208,201,.06); display: none; }
.explanation.show { display: block; }

.glossary-list { display: grid; gap: 10px; }
.glossary-item { border: 1px solid var(--line); background: var(--surface); border-radius: 13px; padding: 16px; }
.glossary-term { display: flex; justify-content: space-between; gap: 10px; cursor: pointer; }
.glossary-term h3 { font-size: 15px; margin: 0; }
.glossary-body { display: none; color: var(--muted); line-height: 1.8; font-size: 13px; padding-top: 12px; }
.glossary-item.open .glossary-body { display: block; }

.disclaimer { margin-top: 30px; padding: 18px; border: 1px solid rgba(255,204,102,.2); background: rgba(255,204,102,.05); border-radius: 14px; color: #c9b889; font-size: 11px; line-height: 1.8; }
.toast { position: fixed; right: 22px; bottom: 22px; background: #17283e; border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; box-shadow: var(--shadow); opacity: 0; pointer-events: none; transform: translateY(8px); transition: .2s ease; z-index: 100; max-width: 330px; font-size: 12px; }
.toast.show { opacity: 1; transform: none; }

@media (max-width: 1100px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .grid-3, .lesson-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .hero-grid, .dashboard-head, .scenario-builder { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: fixed; left: -280px; width: 260px; transition: .25s ease; }
  .sidebar.open { left: 0; box-shadow: 20px 0 60px rgba(0,0,0,.45); }
  .mobile-only { display: grid; place-items: center; }
  .topbar { padding: 14px 16px; min-height: 78px; }
  .topbar-actions .freshness-badge { display: none; }
  .topbar-title h1 { font-size: 18px; }
  .toggle-button { font-size: 10px; padding: 9px; }
  .page { padding: 20px 16px 60px; }
  .grid-2, .grid-3, .grid-4, .lesson-grid, .lesson-hero { grid-template-columns: 1fr; }
  .hero { padding: 24px; }
  .event-item { grid-template-columns: 72px 42px 1fr; }
  .event-item .impact { display: none; }
  .scenario-map { min-height: 430px; }
  .quadrant { padding: 10px; }
  .quadrant p { font-size: 9px; }
}

.install-button { border: 1px solid rgba(89,208,201,.45); background: rgba(89,208,201,.12); color: var(--accent); border-radius: 10px; padding: 10px 12px; font-weight: 800; font-size: 11px; cursor: pointer; white-space: nowrap; }
.install-button:hover { background: rgba(89,208,201,.2); }
@media (display-mode: standalone) { .install-button { display:none !important; } }
@media (max-width: 760px) { .install-button { padding: 9px; font-size: 10px; } }