:root{color-scheme:dark;--bg: #11141b;--panel: #1a1f29;--border: #2a313d;--text: #e5e7eb;--muted: #9aa3b2;--accent: #4ade80;--warn: #fbbf24;--danger: #f87171}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.5 system-ui,-apple-system,sans-serif}.app{max-width:760px;margin:0 auto;padding:24px 18px 64px}h1{font-size:22px;margin:0 0 18px}h2{font-size:18px;margin:0 0 8px}.sub{color:var(--muted);margin:0 0 16px}.warn{color:var(--warn)}button{font:inherit;color:var(--text);background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:9px 16px;cursor:pointer}button:hover{border-color:#3a4150}button.primary{background:var(--accent);color:#08130c;border-color:transparent;font-weight:600}button:disabled{opacity:.6;cursor:default}.row{display:flex;gap:10px;margin-top:14px}section.landing,section.calibrate,section.review,section.home,.drill{background:var(--panel);border:1px solid 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7px;border-radius:999px;font-size:11px;font-weight:700;color:#1a1f2b;background:var(--warn, #e0a33e)}.session .empty button,.progress-entry{margin-top:12px}.progress .back{display:inline-block;margin-bottom:8px;padding:4px 10px;font-size:13px;color:var(--muted)}.progress .coverage{margin:4px 0 20px}.progress .coverage .headline{margin:0 0 8px;font-size:15px}.progress .bar{display:block;height:6px;border-radius:999px;background:#141923;border:1px solid var(--border);overflow:hidden}.progress .bar .fill{display:block;height:100%;background:var(--accent, #5b8def)}.progress .pairgroup{margin-bottom:18px}.progress .pairgroup h3{font-size:13px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin:0 0 8px}.progress .pairgroup .empty{font-size:13px;margin:0}.progress .pairrow .ceiling{margin-left:auto;color:var(--muted);font-variant-numeric:tabular-nums;font-size:14px}.progress .pairrow .ceiling.muted{font-style:italic}.progress .pairrow 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var(--border);border-radius:8px}.install-nudge{position:relative;margin-bottom:16px;padding:14px 16px;background:var(--panel);border:1px solid var(--accent);border-radius:8px}.install-nudge .prompt{margin:0 0 12px;font-size:15px;color:var(--text)}.install-nudge .dismiss{position:absolute;top:6px;right:8px;padding:2px 8px;font-size:18px;line-height:1;color:var(--muted)}.ios-steps{margin:8px 0 0;padding-left:20px;font-size:14px;color:var(--muted);line-height:1.6}.ios-steps strong{color:var(--text)}.unlock{margin-top:20px;padding-top:16px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:12px}.unlock .prompt{margin:0;font-size:15px}.unlock.ready{border-top-color:var(--accent)}.unlock.ready .prompt{color:var(--text)}.unlock.early .prompt{color:var(--muted)}.drillhead .back{padding:4px 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