:root{--surface:#ffffff;--surface-subtle:#f6f7fb;--border:#e2e8f0;--text:#0f172a;--muted:#475569;--accent:#2563eb;--accent-strong:#1d4ed8;--shadow:0 10px 25px rgba(0,0,0,0.12);--card-radius:16px;--header-gradient:linear-gradient(135deg,#0f172a,#111d35);--color-bg:#f6f7fb;--color-surface:#ffffff;--color-surface-alt:#f8f9fa;--color-border:#e2e8f0;--color-border-strong:#cbd5e1;--color-text:#0f172a;--color-text-muted:#475569;--color-text-subtle:#94a3b8;--color-text-inverse:#ffffff;--color-accent:#2563eb;--color-accent-strong:#1d4ed8;--color-accent-soft:rgba(37,99,235,0.1);--color-accent-contrast:#ffffff;--color-success:#16a34a;--color-success-bg:#dcfce7;--color-warning:#d97706;--color-warning-bg:#fef3c7;--color-danger:#dc2626;--color-danger-bg:#fee2e2;--color-info:#2563eb;--color-info-bg:#dbeafe;--space-1:0.25rem;--space-2:0.5rem;--space-3:0.75rem;--space-4:1rem;--space-5:1.5rem;--space-6:2rem;--space-7:3rem;--space-8:4rem;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-pill:999px;--shadow-sm:0 1px 2px rgba(0,0,0,0.05);--shadow-md:0 4px 12px rgba(0,0,0,0.08);--shadow-lg:0 10px 25px rgba(0,0,0,0.12);--shadow-xl:0 16px 36px rgba(0,0,0,0.18);--shadow-focus:0 0 0 3px rgba(37,99,235,0.25);--font-sans:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--font-mono:ui-monospace,"SF Mono",Menlo,monospace;--text-xs:0.75rem;--text-sm:0.875rem;--text-base:1rem;--text-lg:1.125rem;--text-xl:1.25rem;--text-2xl:1.5rem;--text-3xl:2.25rem;--weight-regular:400;--weight-semibold:600;--weight-bold:700;--line-height-tight:1.2;--line-height-base:1.6;--z-base:1;--z-dropdown:100;--z-sticky:500;--z-modal:1000;--z-toast:2000;--transition-fast:150ms ease-out;--transition-base:200ms ease-out;--transition-slow:300ms ease-out}.dark-mode{--surface:#0f172a;--surface-subtle:#111827;--border:#243047;--text:#e5e7eb;--muted:#cbd5e1;--accent:#60a5fa;--accent-strong:#3b82f6;--shadow:0 12px 28px rgba(0,0,0,0.35);--header-gradient:linear-gradient(135deg,#0b1324,#0f172a);--color-bg:#111827;--color-surface:#0f172a;--color-surface-alt:#1e2433;--color-border:#243047;--color-border-strong:#475569;--color-text:#e5e7eb;--color-text-muted:#cbd5e1;--color-text-subtle:#94a3b8;--color-text-inverse:#0f172a;--color-accent:#60a5fa;--color-accent-strong:#3b82f6;--color-accent-soft:rgba(96,165,250,0.18);--color-accent-contrast:#0f172a;--color-success:#22c55e;--color-success-bg:#14532d;--color-warning:#fbbf24;--color-warning-bg:#78350f;--color-danger:#ef4444;--color-danger-bg:#7f1d1d;--color-info:#60a5fa;--color-info-bg:#1e3a8a;--shadow-sm:0 1px 2px rgba(0,0,0,0.3);--shadow-md:0 4px 12px rgba(0,0,0,0.25);--shadow-lg:0 12px 28px rgba(0,0,0,0.35);--shadow-xl:0 20px 40px rgba(0,0,0,0.45);--shadow-focus:0 0 0 3px rgba(96,165,250,0.35)}