/* ============================================================================
   SECTION 1: Brand Palette
   ============================================================================ */

:root {
    /* Primary — Electric Sky */
    --brand-sky: #0EA5E9; /* sky-500    — primary on dark   */
    --brand-sky-dim: #0284C7; /* sky-600    — hover             */
    --brand-sky-deep: #0369A1; /* sky-700    — pressed           */
    /* Secondary — Cobalt / Indigo */
    --brand-cobalt: #6366F1; /* indigo-500 — gradient endpoint */
    --brand-cobalt-dim: #4F46E5; /* indigo-600 — hover             */
    /* Legacy alias */
    --brand-blue: var(--brand-sky);
    --brand-blue-dim: var(--brand-sky-dim);
    --brand-blue-deep: var(--brand-sky-deep);
    /* keep any old violet refs pointing to cobalt */
    --brand-violet: var(--brand-cobalt);
    --brand-violet-dim: var(--brand-cobalt-dim);
    --brand-cyan: var(--brand-sky);
    --brand-cyan-dim: var(--brand-sky-dim);
}


/* ============================================================================
   SECTION 2: Typography Scale
   ============================================================================ */

:root {
    --font-primary: 'Geist', system-ui, -apple-system, sans-serif;
    --font-mono: 'Geist Mono', ui-monospace, Menlo, Monaco, Consolas, monospace;
    --type-display: 2.75rem;
    --type-h1: 2.1875rem;
    --type-h2: 1.75rem;
    --type-h3: 1.4375rem;
    --type-body-lg: 1.125rem;
    --type-body-md: 1rem;
    --type-body-sm: 0.875rem;
    --type-label-lg: 0.875rem;
    --type-label-md: 0.75rem;
    --type-label-sm: 0.75rem;
    --lh-display: 1.15;
    --lh-h1: 1.2;
    --lh-h2: 1.5;
    --lh-h3: 1.3;
    --lh-body: 1.6;
    --lh-label: 1.4;
}


/* ============================================================================
   SECTION 3: Spacing, Radius & Motion
   ============================================================================ */

:root {
    --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;
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.375rem;
    --radius-full: 9999px;
    --border-width: 1px;
    --ease-out: cubic-bezier(0, 0, .2, 1);
    --ease-standard: cubic-bezier(.2, .8, .2, 1);
    --dur-fast: 100ms;
    --dur-med: 200ms;
    --dur-slow: 350ms;
}


/* ============================================================================
   SECTION 4: Semantic Tokens — Dark (default)
   Deep purple-black surfaces — the AI startup aesthetic.
   ============================================================================ */

:root {
    /* Surfaces — deep navy-black */
    --bg: #06090F;
    --surface: #0C1220;
    --surface-2: #121A2E;
    --surface-3: #19223A;
    /* Text */
    --text: #E8F0FC;
    --text-muted: #7D8EAD;
    --text-secondary: #485470;
    /* Borders */
    --border: rgba(14, 165, 233, 0.12);
    --border-light: rgba(14, 165, 233, 0.06);
    --border-focus: var(--primary);
    /* Hover overlays */
    --hover-overlay: rgba(14, 165, 233, 0.07);
    --hover-overlay-strong: rgba(14, 165, 233, 0.14);
    /* Primary accent — sky */
    --primary: var(--brand-sky);
    --primary-dark: var(--brand-sky-dim);
    --primary-subtle: rgba(14, 165, 233, 0.10);
    --primary-glow: rgba(14, 165, 233, 0.35);
    --primary-contrast: #FFFFFF;
    /* Dual-accent gradient: sky → cobalt */
    --gradient-brand: linear-gradient(135deg, var(--brand-sky) 0%, var(--brand-cobalt) 100%);
    --gradient-brand-soft: linear-gradient(135deg, rgba(14,165,233,0.14) 0%, rgba(99,102,241,0.10) 100%);
    /* Secondary */
    --secondary: #19223A;
    --secondary-dark: #0F1728;
    /* Status */
    --danger: #F06080;
    --success: #3DD68C;
    --warning: #F5C542;
    --info: var(--brand-sky);
    --success-subtle: rgba(61, 214, 140, 0.14);
    --warning-subtle: rgba(245, 197, 66, 0.14);
    --danger-subtle: rgba(240, 96, 128, 0.14);
    --info-subtle: rgba(14, 165, 233, 0.12);
    /* Shadows — strong on dark surfaces */
    --shadow-1: 0 1px 3px rgba(0,0,0,.50);
    --shadow-2: 0 4px 16px rgba(0,0,0,.55), 0 1px 4px rgba(0,0,0,.40);
    --shadow-3: 0 8px 32px rgba(0,0,0,.65), 0 2px 8px rgba(0,0,0,.50);
    --shadow-4: 0 16px 48px rgba(0,0,0,.70), 0 4px 16px rgba(0,0,0,.55);
    --shadow-5: 0 24px 64px rgba(0,0,0,.75), 0 8px 24px rgba(0,0,0,.60);
    /* Glow shadows */
    --glow-primary: 0 0 24px rgba(14,165,233,0.45), 0 0 8px rgba(14,165,233,0.28);
    --glow-cyan: 0 0 24px rgba(99,102,241,0.35), 0 0 8px rgba(99,102,241,0.20);
    --focus: rgba(14, 165, 233, 0.30);
}


    /* ============================================================================
   SECTION 5: Semantic Tokens — Light Override  [data-theme="light"]
   ============================================================================ */

    :root[data-theme="light"] {
        --bg: #E8EAED;
        --surface: #F4F5F7;
        --surface-2: #ECEEF1;
        --surface-3: #E2E5E9;
        --text: #07111E;
        --text-muted: #3D5470;
        --text-secondary: #7A93B0;
        --border: rgba(2, 132, 199, 0.13);
        --border-light: rgba(2, 132, 199, 0.07);
        --hover-overlay: rgba(2, 132, 199, 0.05);
        --hover-overlay-strong: rgba(2, 132, 199, 0.10);
        --primary: var(--brand-sky-dim);
        --primary-dark: var(--brand-sky-deep);
        --primary-subtle: rgba(2, 132, 199, 0.09);
        --primary-glow: rgba(2, 132, 199, 0.25);
        --gradient-brand: linear-gradient(135deg, var(--brand-sky-dim) 0%, var(--brand-cobalt-dim) 100%);
        --gradient-brand-soft: linear-gradient(135deg, rgba(2,132,199,0.10) 0%, rgba(79,70,229,0.08) 100%);
        --secondary: #D1E9FA;
        --secondary-dark: #BAD9F5;
        --danger: #DC2626;
        --success: #16A34A;
        --warning: #CA8A04;
        --info: #0369A1;
        --success-subtle: rgba(22, 163, 74, 0.10);
        --warning-subtle: rgba(202, 138, 4, 0.10);
        --danger-subtle: rgba(220, 38, 38, 0.10);
        --info-subtle: rgba(3, 105, 161, 0.10);
        --shadow-1: 0 1px 3px rgba(7,17,30,.07);
        --shadow-2: 0 2px 10px rgba(7,17,30,.09), 0 1px 2px rgba(7,17,30,.06);
        --shadow-3: 0 4px 20px rgba(7,17,30,.10), 0 2px 4px rgba(7,17,30,.07);
        --shadow-4: 0 8px 32px rgba(7,17,30,.12), 0 3px 8px rgba(7,17,30,.08);
        --shadow-5: 0 16px 48px rgba(7,17,30,.14), 0 6px 16px rgba(7,17,30,.09);
        --glow-primary: 0 0 20px rgba(2,132,199,0.28), 0 0 6px rgba(2,132,199,0.16);
        --glow-cyan: 0 0 20px rgba(79,70,229,0.22), 0 0 6px rgba(79,70,229,0.12);
        --focus: rgba(2, 132, 199, 0.22);
    }


/* ============================================================================
   SECTION 5b: Accent Overlay — Green  [data-accent="green"]
   A second, orthogonal axis on top of the light/dark mode. The brand hue vars are
   overridden here (mode-agnostic) so every derived token (--primary, --gradient-brand,
   --info, --mud-palette-primary, …) turns green automatically; the accent-tinted rgba
   tokens are overridden per mode below. Green: #647E35. Blue is the default (no overlay).
   ============================================================================ */

    :root[data-accent="green"] {
        --brand-sky: #647E35;      /* green primary (replaces sky)         */
        --brand-sky-dim: #56702E;  /* hover / light-mode primary           */
        --brand-sky-deep: #475D26; /* pressed                              */
        --brand-cobalt: #8BA84A;   /* gradient endpoint — lighter green    */
        --brand-cobalt-dim: #6E8C3B;
    }

    /* Green + Dark — green rgba at dark-mode opacities. */
    :root[data-theme="dark"][data-accent="green"] {
        --border: rgba(100, 126, 53, 0.16);
        --border-light: rgba(100, 126, 53, 0.08);
        --hover-overlay: rgba(100, 126, 53, 0.08);
        --hover-overlay-strong: rgba(100, 126, 53, 0.16);
        --primary-subtle: rgba(100, 126, 53, 0.12);
        --primary-glow: rgba(100, 126, 53, 0.38);
        --gradient-brand-soft: linear-gradient(135deg, rgba(100,126,53,0.16) 0%, rgba(139,168,74,0.10) 100%);
        --glow-primary: 0 0 24px rgba(100,126,53,0.45), 0 0 8px rgba(100,126,53,0.28);
        --info: #8BA84A;
        --info-subtle: rgba(100, 126, 53, 0.14);
        --focus: rgba(100, 126, 53, 0.30);
    }

    /* Green + Light — green rgba at light-mode opacities + the specified dark text. */
    :root[data-theme="light"][data-accent="green"] {
        --text: #515151;
        --border: rgba(100, 126, 53, 0.16);
        --border-light: rgba(100, 126, 53, 0.08);
        --hover-overlay: rgba(100, 126, 53, 0.07);
        --hover-overlay-strong: rgba(100, 126, 53, 0.13);
        --primary-subtle: rgba(100, 126, 53, 0.11);
        --primary-glow: rgba(100, 126, 53, 0.25);
        --gradient-brand-soft: linear-gradient(135deg, rgba(100,126,53,0.12) 0%, rgba(110,140,59,0.09) 100%);
        --glow-primary: 0 0 20px rgba(100,126,53,0.28), 0 0 6px rgba(100,126,53,0.16);
        --info: #475D26;
        --info-subtle: rgba(100, 126, 53, 0.12);
        --focus: rgba(100, 126, 53, 0.22);
    }


/* ============================================================================
   SECTION 6: Backward-compat Aliases
   ============================================================================ */

:root {
    --ux-primary: var(--primary);
    --ux-primary-dark: var(--primary-dark);
    --ux-primary-light: var(--brand-violet);
    --ux-primary-subtle: var(--primary-subtle);
    --ux-border-color: var(--border);
    --ux-border-radius: var(--radius-sm);
    --ux-border-radius-lg: var(--radius-md);
    --ux-border-radius-xl: var(--radius-lg);
    --ux-shadow-sm: var(--shadow-1);
    --ux-shadow: var(--shadow-2);
    --ux-shadow-lg: var(--shadow-4);
    --ux-font-family: var(--font-primary);
    --ux-font-size-xs: var(--type-label-sm);
    --ux-font-size-sm: var(--type-body-sm);
    --ux-font-size-base: var(--type-body-md);
    --ux-font-size-lg: var(--type-body-lg);
    --ux-font-size-xl: var(--type-h3);
    --ux-font-size-2xl: var(--type-h2);
    --ux-font-size-3xl: var(--type-h1);
    --ux-font-size-4xl: var(--type-display);
    --ux-spacing-xs: var(--space-1);
    --ux-spacing-sm: var(--space-2);
    --ux-spacing-md: var(--space-4);
    --ux-spacing-lg: var(--space-5);
    --ux-spacing-xl: var(--space-6);
    --ux-spacing-2xl: var(--space-7);
    --ux-success: var(--success);
    --ux-success-light: var(--success-subtle);
    --ux-warning: var(--warning);
    --ux-warning-light: var(--warning-subtle);
    --ux-error: var(--danger);
    --ux-error-light: var(--danger-subtle);
    --ux-info: var(--info);
    --ux-info-light: var(--info-subtle);
    --ux-white: var(--text);
    --ux-gray-900: var(--text);
    --ux-gray-800: var(--text-muted);
    --ux-gray-700: var(--text-secondary);
    --ux-gray-600: color-mix(in srgb, var(--text-secondary) 70%, transparent);
    --ux-gray-500: var(--border);
    --ux-gray-400: var(--surface-3);
    --ux-gray-300: var(--surface-2);
    --ux-gray-200: var(--surface);
    --ux-gray-100: var(--bg);
}