/* v2 Design System - CSS Custom Properties */
:root {
    color-scheme: dark light;

    /* Brand Colors (same in both themes) */
    --brand: #055594;
    --brand-bright: #1a7ad4;
    --brand-light: #3a9aef;
    --brand-dim: rgba(5, 85, 148, 0.15);
    --brand-glow: rgba(26, 122, 212, 0.25);

    /* Accent (same in both themes) */
    --accent: #38bdf8;
    --accent-dim: rgba(56, 189, 248, 0.1);

    /* Status colors (same in both themes) */
    --success: #22c55e;
    --green: #34d399;
    --green-dim: rgba(52, 211, 153, 0.1);
    --amber: #f0a030;
    --amber-dim: rgba(240, 160, 48, 0.12);
    --purple: #a78bfa;
    --purple-dim: rgba(167, 139, 250, 0.1);
    --red: #f87171;
    --red-dim: rgba(248, 113, 113, 0.1);
    --rose: #fb7185;
    --rose-dim: rgba(251, 113, 133, 0.1);

    /* Backgrounds — dark default */
    --bg: #060c17;
    --bg-raised: #0b1322;
    --bg-card: #0f1a2e;

    /* Text — dark default */
    --text: #e4e9f0;
    --text-muted: #7889a0;
    --text-faint: #5e7389;

    /* Borders — dark default */
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(5, 85, 148, 0.4);

    /* Surface overlays */
    --white-overlay: rgba(255, 255, 255, 0.04);
    --white-overlay-hover: rgba(255, 255, 255, 0.08);

    /* Header / Nav / Footer */
    --header-bg: rgba(6, 12, 23, 0.88);
    --mobile-nav-bg: rgba(11, 19, 34, 0.97);
    --footer-bg: linear-gradient(180deg, #061020 0%, #091428 40%, #0b1a32 100%);
    --footer-border: rgba(5, 85, 148, 0.2);

    /* Typography */
    --font-display: 'Newsreader', serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --container-max-width: 68.75rem; /* 1100px */
    --container-padding: clamp(1.25rem, 5vw, 3rem);

    /* Border Radius */
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    /* Header */
    --header-height: 4rem;
    --header-height-mobile: 3.5rem;
    --header-height-large: 4rem;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
    --shadow-brand: 0 25px 50px -12px rgba(5, 85, 148, 0.35);
    --shadow-brand-hover: 0 20px 40px -12px rgba(5, 85, 148, 0.45);
    --shadow-glow: 0 0 20px rgba(26, 122, 212, 0.15);

    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.2s ease;
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-entrance: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-index scale */
    --z-dropdown: 10;
    --z-sticky: 20;
    --z-fixed: 30;
    --z-modal-backdrop: 40;
    --z-modal: 50;
    --z-popover: 60;
    --z-tooltip: 70;

    /* Legacy mappings for compatibility with v1 class names */
    --background: var(--bg);
    --foreground: var(--text);
    --primary: var(--brand);
    --primary-light: var(--brand-bright);
    --primary-foreground: #ffffff;
    --secondary: var(--bg-raised);
    --muted: var(--bg-card);
    --muted-foreground: var(--text-muted);
}

/* ── LIGHT MODE ── */
/* System preference (unless user has manually chosen dark) */
@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) {
        --bg: #f8f9fb;
        --bg-raised: #ffffff;
        --bg-card: #ffffff;
        --text: #1a1f2e;
        --text-muted: #5a6578;
        --text-faint: #8896a8;
        --border: rgba(0, 0, 0, 0.08);
        --border-hover: rgba(5, 85, 148, 0.3);
        --brand-dim: rgba(5, 85, 148, 0.07);
        --brand-glow: rgba(26, 122, 212, 0.1);
        --accent-dim: rgba(56, 189, 248, 0.07);
        --green-dim: rgba(52, 211, 153, 0.08);
        --amber-dim: rgba(240, 160, 48, 0.08);
        --purple-dim: rgba(167, 139, 250, 0.08);
        --red-dim: rgba(248, 113, 113, 0.08);
        --rose-dim: rgba(251, 113, 133, 0.08);
        --white-overlay: rgba(0, 0, 0, 0.02);
        --white-overlay-hover: rgba(0, 0, 0, 0.04);
        --header-bg: rgba(255, 255, 255, 0.92);
        --mobile-nav-bg: rgba(255, 255, 255, 0.98);
        --footer-bg: linear-gradient(180deg, #f0f2f5 0%, #e8ecf0 40%, #dfe4ea 100%);
        --footer-border: rgba(5, 85, 148, 0.12);
        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
        --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
        --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.12);
        --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
        --shadow-brand: 0 25px 50px -12px rgba(5, 85, 148, 0.12);
        --shadow-brand-hover: 0 20px 40px -12px rgba(5, 85, 148, 0.18);
        --shadow-glow: 0 0 20px rgba(26, 122, 212, 0.08);
    }
}

/* Manual override via data-theme attribute */
:root[data-theme="light"] {
    --bg: #f8f9fb;
    --bg-raised: #ffffff;
    --bg-card: #ffffff;
    --text: #1a1f2e;
    --text-muted: #5a6578;
    --text-faint: #8896a8;
    --border: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(5, 85, 148, 0.3);
    --brand-dim: rgba(5, 85, 148, 0.07);
    --brand-glow: rgba(26, 122, 212, 0.1);
    --accent-dim: rgba(56, 189, 248, 0.07);
    --green-dim: rgba(52, 211, 153, 0.08);
    --amber-dim: rgba(240, 160, 48, 0.08);
    --purple-dim: rgba(167, 139, 250, 0.08);
    --red-dim: rgba(248, 113, 113, 0.08);
    --rose-dim: rgba(251, 113, 133, 0.08);
    --white-overlay: rgba(0, 0, 0, 0.02);
    --white-overlay-hover: rgba(0, 0, 0, 0.04);
    --header-bg: rgba(255, 255, 255, 0.92);
    --mobile-nav-bg: rgba(255, 255, 255, 0.98);
    --footer-bg: linear-gradient(180deg, #f0f2f5 0%, #e8ecf0 40%, #dfe4ea 100%);
    --footer-border: rgba(5, 85, 148, 0.12);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    --shadow-brand: 0 25px 50px -12px rgba(5, 85, 148, 0.12);
    --shadow-brand-hover: 0 20px 40px -12px rgba(5, 85, 148, 0.18);
    --shadow-glow: 0 0 20px rgba(26, 122, 212, 0.08);
}

/* Responsive header heights */
@media (max-width: 1023px) {
    :root {
        --header-height: var(--header-height-mobile);
    }
}

@media (min-width: 1024px) {
    :root {
        --header-height: var(--header-height-large);
    }
}