/* Training Intelligence — Variables & Reset */
:root{--bg-primary:#0a0a0f;--bg-surface:#141420;--bg-surface-hover:#1a1a2e;--bg-elevated:#1e1e30;--border-color:#2a2a3e;--border-subtle:#1f1f2e;--text-primary:#f5f5f7;--text-secondary:#8888a0;--text-tertiary:#5a5a70;--accent:#8b5cf6;--accent-hover:#a78bfa;--accent-muted:rgba(139,92,246,0.15);--success:#22c55e;--success-muted:rgba(34,197,94,0.15);--warning:#eab308;--warning-muted:rgba(234,179,8,0.15);--error:#ef4444;--error-muted:rgba(239,68,68,0.15);--danger:#ef4444;--info:#3b82f6;--info-muted:rgba(59,130,246,0.15);--strava:#fc4c02;--strava-muted:rgba(252,76,2,0.15);--sleep:#a855f7;--sleep-muted:rgba(168,85,247,0.15);--sidebar-width:240px;--sidebar-collapsed:72px;--topbar-height:64px;--card-padding:24px;--gap-lg:24px;--gap-md:16px;--gap-sm:8px;--gap-xs:4px;--radius-lg:16px;--radius-md:12px;--radius-sm:8px;--radius-xs:6px;--shadow-md:0 4px 12px rgba(0,0,0,0.4);--shadow-lg:0 8px 24px rgba(0,0,0,0.5);--transition-fast:150ms ease;--transition-base:200ms ease}
[data-theme="light"]{--bg-primary:#f5f5f7;--bg-surface:#ffffff;--bg-surface-hover:#f0f0f5;--bg-elevated:#ffffff;--border-color:#e5e5ea;--border-subtle:#ebebf0;--text-primary:#1a1a2e;--text-secondary:#6b6b80;--text-tertiary:#9898a8;--accent:#7c3aed;--accent-hover:#6d28d9;--accent-muted:rgba(124,58,237,0.1);--shadow-md:0 4px 12px rgba(0,0,0,0.08);--shadow-lg:0 8px 24px rgba(0,0,0,0.12)}
*{margin:0;padding:0;box-sizing:border-box;scrollbar-width:thin;scrollbar-color:var(--border-color) transparent}
*::-webkit-scrollbar{width:6px;height:6px}
*::-webkit-scrollbar-track{background:transparent}
*::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px;transition:background 0.2s ease}
*::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}
*::-webkit-scrollbar-corner{background:transparent}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg-primary);color:var(--text-primary);font-size:14px;line-height:1.5;overflow-x:hidden}
:root{--strava-brand:#FC4C02;--strava-hr:#E14A3B;--strava-cadence:#E91E8C;--strava-power:#9B59B6;--strava-pace:#3498DB;--strava-elevation:#7F8C8D;--strava-success:#27AE60;--garmin-brand:#11BFAE}