/* CSS Custom Properties - Design System */

/* Import Comfortaa Font from Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Comfortaa:wght@300;400;500;600;700&display=swap');

:root {
    /* Tell the browser this site is LIGHT (form controls, scrollbars, etc.) */
    color-scheme: light;

    /* Colors - DIGITALABS Brand (from logo) */
    --color-primary: #5a0e15;           /* Bordeaux red - DIGITA */
    --color-primary-dark: #3a0a0f;      /* Darker bordeaux */
    --color-primary-light: #7a1e25;     /* Lighter bordeaux for hovers */

    --color-secondary: #3f4444;         /* Dark grey - LABS & text */
    --color-accent: #5a0e15;            /* Same as primary */

    /* Neutrals */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    --color-black: #000000;

    /* Semantic Colors */
    --color-text: #3f4444;              /* Secondary color from logo */
    --color-text-light: var(--color-gray-600);
    --color-background: var(--color-white);
    --color-surface: var(--color-gray-50);
    --color-border: var(--color-gray-200);

    /* Typography - Comfortaa Font */
    --font-family-base: 'Comfortaa', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-family-heading: 'Comfortaa', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-mono: 'Monaco', 'Courier New', monospace;

    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.5rem;      /* 24px */
    --font-size-3xl: 1.875rem;    /* 30px */
    --font-size-4xl: 2.25rem;     /* 36px */
    --font-size-5xl: 3rem;        /* 48px */
    --font-size-6xl: 3.75rem;     /* 60px */

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Spacing */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    --space-24: 6rem;     /* 96px */
    --space-32: 8rem;     /* 128px */

    /* Layout */
    --container-width: 1200px;
    --container-padding: var(--space-6);

    --header-height: 80px;
    --header-height-mobile: 70px;

    /* Border Radius */
    --radius-sm: 0.25rem;   /* 4px */
    --radius-md: 0.5rem;    /* 8px */
    --radius-lg: 1rem;      /* 16px */
    --radius-xl: 1.5rem;    /* 24px */
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Z-index */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-cool: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

/* Base page colours (prevents unwanted dark background inheritance on mobile) */
html, body {
    background: var(--color-background);
    color: var(--color-text);
}

/* ==========================================================
   FORCE LIGHT THEME (lock colours even if device is in dark mode)
   - DIGITALABS: no dark theme is supported by design
   ========================================================== */
@media (prefers-color-scheme: dark) {
    :root {
        color-scheme: light;

        /* Keep LIGHT tokens */
        --color-text: #3f4444;
        --color-text-light: var(--color-gray-600);
        --color-background: var(--color-white);
        --color-surface: var(--color-gray-50);
        --color-border: var(--color-gray-200);
    }

    html, body {
        background: var(--color-background);
        color: var(--color-text);
    }
}