:root,[data-theme=dark]{--bg: #0f1218;--bg-elev: #161a22;--card: #1a1f29;--card-2: #212734;--border: #2a3140;--text: #e8ebf1;--text-dim: #a3abba;--text-faint: #7a8396;--accent: #e9b649;--accent-ink: #1b1505;--accent-soft: rgba(233, 182, 73, .14);--ok: #5fcf8f;--ok-soft: rgba(95, 207, 143, .14);--bad: #f07a7a;--bad-soft: rgba(240, 122, 122, .14);--warn: #8fb8ff;--warn-soft: rgba(143, 184, 255, .14);--shadow: 0 1px 0 rgba(255, 255, 255, .03) inset, 0 8px 24px rgba(0, 0, 0, .25);color-scheme:dark}[data-theme=light]{--bg: #f5f3ee;--bg-elev: #ffffff;--card: #ffffff;--card-2: #f4f1ea;--border: #e2ddd2;--text: #1d222b;--text-dim: #4d5565;--text-faint: #6b7385;--accent: #9a6a00;--accent-ink: #ffffff;--accent-soft: rgba(154, 106, 0, .1);--ok: #1b7f4b;--ok-soft: rgba(27, 127, 75, .1);--bad: #b3261e;--bad-soft: rgba(179, 38, 30, .08);--warn: #2457b3;--warn-soft: rgba(36, 87, 179, .08);--shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 6px 18px rgba(30, 25, 10, 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p{color:var(--text-dim);margin-top:4px}.bottom-nav{display:none}@media (max-width: 860px){.layout{grid-template-columns:1fr}.sidebar{display:none}.main{padding:20px 14px 96px}.bottom-nav{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:30;background:var(--bg-elev);border-top:1px solid var(--border);padding:6px 4px calc(6px + env(safe-area-inset-bottom));justify-content:space-around}.bottom-nav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:.68rem;color:var(--text-faint);text-decoration:none;padding:4px 0;border-radius:8px}.bottom-nav a.active{color:var(--accent)}.bottom-nav svg{width:20px;height:20px}}.grid{display:grid;gap:16px}.grid-4{grid-template-columns:repeat(4,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}@media (max-width: 1000px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:1fr 1fr}}@media (max-width: 620px){.grid-3,.grid-2{grid-template-columns:1fr}}.add-grid{grid-template-columns:minmax(0,2fr) minmax(0,1fr)}@media (max-width: 860px){.add-grid{grid-template-columns:1fr}}.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:20px;box-shadow:var(--shadow)}.card-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;gap:12px}.card-sub{color:var(--text-dim);font-size:.88rem}.stack{display:flex;flex-direction:column;gap:16px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.spacer{flex:1}.muted{color:var(--text-dim)}.faint{color:var(--text-faint);font-size:.85rem}.mt{margin-top:16px}.stat{display:flex;flex-direction:column;gap:4px}.stat-label{color:var(--text-dim);font-size:.82rem;font-weight:500}.stat-value{font-size:1.75rem;font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:-.02em}.stat-hint{color:var(--text-faint);font-size:.8rem}.progress{height:8px;background:var(--card-2);border-radius:99px;overflow:hidden}.progress>span{display:block;height:100%;background:var(--accent);border-radius:99px;transition:width .3s 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th{text-align:left;color:var(--text-faint);font-weight:600;font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;padding:8px 10px;border-bottom:1px solid var(--border);white-space:nowrap}table.words td{padding:10px;border-bottom:1px solid var(--border);vertical-align:top}table.words tr:hover td{background:var(--card-2)}.term-cell{font-weight:600}.num{font-variant-numeric:tabular-nums;text-align:right}.study-wrap{max-width:680px;margin:0 auto}.study-top{display:flex;align-items:center;gap:14px;margin-bottom:18px}.study-top .progress{flex:1}.study-card{text-align:center;padding:40px 28px 30px}.study-term{font-family:"Source Serif 4",Georgia,serif;font-size:clamp(2rem,6vw,2.9rem);font-weight:700;letter-spacing:-.01em;word-break:break-word}.study-meta{color:var(--text-faint);font-size:.82rem;margin-top:8px}.options{display:grid;gap:10px;margin-top:26px;text-align:left}.option{display:flex;gap:12px;align-items:center;width:100%;background:var(--card-2);border:1px solid 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