/* ASBC Design System — StudyMate-inspired tokens */
:root {
    /* Layout */
    --sidebar-width: 270px;
    --sidebar-bg: linear-gradient(180deg, #0b0f19 0%, #111827 100%);
    --sidebar-hover: rgba(255, 255, 255, 0.05);
    --sidebar-active: var(--primary, #7A0202);
    --sidebar-active-bg: rgba(var(--primary-rgb, 122, 2, 2), 0.08);
    --header-height: 70px;
    --container-max: 1320px;
    --section-spacing: clamp(3.5rem, 6vw, 5.5rem);
    --section-spacing-sm: clamp(2.5rem, 4vw, 3.5rem);

    /* Brand palette */
    --primary: #7A0202;
    --primary-hover: #5C0101;
    --primary-light: #F5E6E6;
    --primary-rgb: 122, 2, 2;
    --secondary: #64748b;
    --accent: #D4A574;
    --accent-rgb: 212, 165, 116;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;

    /* Surfaces */
    --bg-body: #f8fafc;
    --bg-surface: #ffffff;
    --bg-muted: #f1f5f9;
    --bg-elevated: #ffffff;
    --border-color: #e2e8f0;
    --border-color-strong: #cbd5e1;

    /* Typography */
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-subtle: #94a3b8;
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: var(--font-sans);
    --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: clamp(1.75rem, 3vw, 2.25rem);
    --text-4xl: clamp(2.25rem, 4.5vw, 3.25rem);
    --leading-tight: 1.2;
    --leading-normal: 1.6;
    --leading-relaxed: 1.75;
    --tracking-tight: -0.03em;
    --tracking-wide: 0.04em;

    /* Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.25rem;
    --radius-2xl: 1.5rem;
    --radius-pill: 999px;

    /* Shadows */
    --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.04), 0 2px 8px -1px rgba(15, 23, 42, 0.03);
    --card-shadow-hover: 0 20px 40px -12px rgba(var(--primary-rgb, 122, 2, 2), 0.12), 0 8px 16px -8px rgba(15, 23, 42, 0.06);
    --shadow-nav: 0 4px 24px rgba(15, 23, 42, 0.06);
    --shadow-btn: 0 8px 24px rgba(var(--primary-rgb, 122, 2, 2), 0.28);

    /* Motion */
    --ease-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --duration-slow: 400ms;

    /* Focus */
    --focus-ring: 0 0 0 3px rgba(var(--primary-rgb), 0.25);
    --focus-ring-offset: 2px;
}