:root{color-scheme:light;--bg: #f3f5fb;--panel: #ffffff;--panel-2: #f8f9fd;--text: #162033;--muted: #76829b;--line: #e6ebf4;--brand: #5b7cff;--brand-soft: #eef2ff;--success: #18b67a;--warning: #ffb347;--danger: #ff6b6b;--shadow: 0 20px 50px rgba(25, 33, 61, .12)}*{box-sizing:border-box}html,body{min-height:100%;margin:0;font-family:Inter,PingFang SC,Microsoft YaHei,Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}a{color:inherit;text-decoration:none}button,input{font:inherit}#root{min-height:100vh}.appBackdrop{min-height:100vh;padding:24px 16px;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at top,rgba(91,124,255,.18),transparent 28%),linear-gradient(180deg,#eef2ff,#f4f6fb 28%,#eef2f8)}.deviceShell{width:100%;max-width:430px;min-height:100vh;background:linear-gradient(180deg,#f8faff,#f1f4fb);border:1px solid 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p{margin:0;color:var(--muted);line-height:1.45}.exerciseCard{position:relative;padding:14px;border-radius:20px;background:var(--panel-2);border:1px solid rgba(230,235,244,.9)}.activeExerciseCard{border-color:#5b7cff73;box-shadow:0 12px 26px #5b7cff1f;background:linear-gradient(180deg,#f6f8ff,#eef2ff)}.completedExerciseCard:not(.activeExerciseCard){background:linear-gradient(180deg,#f8fafc,#f2f5fb);border-color:#10b9813d}.exerciseStamp{position:absolute;top:12px;right:12px;padding:6px 10px;border-radius:999px;background:#10b9811f;color:#059669;border:1px solid rgba(16,185,129,.2);font-size:12px;font-weight:800;letter-spacing:.02em}.exerciseCard strong{display:block;margin-bottom:6px;font-size:16px}.exerciseHeaderRow{display:flex;align-items:center;justify-content:space-between;gap:10px}.completedExerciseCard .exerciseHeaderRow{padding-right:72px}.exerciseHeaderRow 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.tabIcon{background:var(--brand-soft)}.tabLabel{font-size:12px;font-weight:700}@media(max-width:520px){.appBackdrop{padding:0}.deviceShell{max-width:none;min-height:100vh;border:none;border-radius:0;box-shadow:none}.appContent{padding-left:14px;padding-right:14px}.grid.cols2,.statsGrid,.heroMeta,.quickActionGrid{grid-template-columns:1fr}}@media(min-width:521px){.deviceShell{min-height:860px;max-height:920px}}