:root{--color-bg: #f8f9fa;--color-bg-alt: #ffffff;--color-surface: #ffffff;--color-surface-alt: #f1f5f9;--color-border: #dbe3ec;--color-border-soft: #e2e8f0;--color-text: #1e293b;--color-text-soft: #475569;--color-text-faint: #64748b;--color-primary: #3b82f6;--color-primary-accent: #1d60d8;--color-danger: #dc2626;--color-success: #16a34a;--shadow-sm: 0 1px 2px rgba(0,0,0,.08);--shadow-md: 0 4px 16px -2px rgba(0,0,0,.15);--radius-sm: 4px;--radius-md: 8px;--radius-lg: 14px;color-scheme:light}body.dark{--color-bg: #0f172a;--color-bg-alt: #1e293b;--color-surface: #1e293b;--color-surface-alt: #243347;--color-border: #334155;--color-border-soft: #2b3a4c;--color-text: #f1f5f9;--color-text-soft: #cbd5e1;--color-text-faint: #94a3b8;--color-primary: #3b82f6;--color-primary-accent: #1d4ed8;--color-danger: #ef4444;--color-success: #22c55e;--shadow-sm: 0 1px 2px rgba(0,0,0,.5);--shadow-md: 0 6px 24px -4px rgba(0,0,0,.6);color-scheme:dark;background:var(--color-bg);color:var(--color-text)}body,html{background:var(--color-bg);color:var(--color-text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}body::-webkit-scrollbar{width:10px}body::-webkit-scrollbar-track{background:var(--color-bg-alt)}body::-webkit-scrollbar-thumb{background:var(--color-border-soft);border-radius:6px}body.dark::-webkit-scrollbar-thumb{background:#475569}.btn-theme-toggle{background:var(--color-surface-alt);border:1px solid var(--color-border);color:var(--color-text);padding:6px 10px;border-radius:var(--radius-sm);cursor:pointer;display:flex;align-items:center;gap:6px;font-size:12px;font-weight:500;box-shadow:var(--shadow-sm);transition:background .2s,border-color .2s,color .2s}.btn-theme-toggle:hover{background:var(--color-surface)}.btn-theme-toggle:active{transform:translateY(1px)}*{transition:background-color .25s ease,color .25s ease,border-color .25s ease}