/**
 * RESPIRO Design System - CSS Variables
 * Dark stone aesthetic with amber highlights
 */

:root {
    /* Color Palette - Stone/Black */
    --stone-50: #fafaf9;
    --stone-100: #f5f5f4;
    --stone-200: #e7e5e4;
    --stone-300: #d6d3d1;
    --stone-400: #a8a29e;
    --stone-500: #78716c;
    --stone-600: #57534e;
    --stone-700: #44403c;
    --stone-800: #292524;
    --stone-900: #1c1917;
    --stone-950: #0c0a09;

    /* Amber Accent */
    --amber-50: #fffbeb;
    --amber-100: #fef3c7;
    --amber-200: #fde68a;
    --amber-300: #fcd34d;
    --amber-400: #fbbf24;
    --amber-500: #f59e0b;
    --amber-600: #d97706;
    --amber-700: #b45309;
    --amber-800: #92400e;
    --amber-900: #78350f;

    /* Semantic Colors */
    --color-bg: var(--stone-950);
    --color-bg-secondary: var(--stone-900);
    --color-bg-tertiary: var(--stone-800);
    --color-surface: rgba(28, 25, 23, 0.6);
    --color-surface-hover: rgba(41, 37, 36, 0.8);

    --color-text: var(--stone-200);
    --color-text-muted: var(--stone-400);
    --color-text-subtle: var(--stone-500);
    --color-text-inverse: var(--stone-950);

    --color-border: var(--stone-800);
    --color-border-subtle: rgba(68, 64, 60, 0.5);

    --color-primary: var(--amber-700);
    --color-primary-hover: var(--amber-600);
    --color-primary-light: var(--amber-500);
    --color-primary-muted: rgba(180, 83, 9, 0.2);

    --color-success: #22c55e;
    --color-success-bg: rgba(34, 197, 94, 0.1);
    --color-warning: #eab308;
    --color-warning-bg: rgba(234, 179, 8, 0.1);
    --color-error: #ef4444;
    --color-error-bg: rgba(239, 68, 68, 0.1);
    --color-info: #3b82f6;
    --color-info-bg: rgba(59, 130, 246, 0.1);

    /* Typography */
    --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    --text-xs: 0.625rem;      /* 10px */
    --text-sm: 0.75rem;       /* 12px */
    --text-base: 0.875rem;    /* 14px */
    --text-md: 1rem;          /* 16px */
    --text-lg: 1.125rem;      /* 18px */
    --text-xl: 1.25rem;       /* 20px */
    --text-2xl: 1.5rem;       /* 24px */
    --text-3xl: 1.875rem;     /* 30px */
    --text-4xl: 2.25rem;      /* 36px */
    --text-5xl: 3rem;         /* 48px */
    --text-6xl: 3.75rem;      /* 60px */
    --text-7xl: 4.5rem;       /* 72px */
    --text-8xl: 6rem;         /* 96px */

    --leading-none: 1;
    --leading-tight: 1.1;
    --leading-snug: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;

    --tracking-tighter: -0.05em;
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;
    --tracking-widest: 0.2em;
    --tracking-ultra: 0.3em;

    /* Spacing */
    --space-0: 0;
    --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 */
    --space-40: 10rem;        /* 160px */

    /* Border Radius */
    --radius-none: 0;
    --radius-sm: 0.25rem;     /* 4px */
    --radius-md: 0.375rem;    /* 6px */
    --radius-lg: 0.5rem;      /* 8px */
    --radius-xl: 0.75rem;     /* 12px */
    --radius-2xl: 1rem;       /* 16px */
    --radius-3xl: 1.5rem;     /* 24px */
    --radius-4xl: 2rem;       /* 32px */
    --radius-5xl: 2.5rem;     /* 40px */
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.3);
    --shadow-amber: 0 10px 30px -5px rgba(180, 83, 9, 0.2);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    --transition-slower: 500ms ease;
    --transition-slowest: 1000ms ease;

    /* Z-Index Scale */
    --z-dropdown: 50;
    --z-sticky: 60;
    --z-fixed: 70;
    --z-modal-backdrop: 80;
    --z-modal: 90;
    --z-popover: 100;
    --z-tooltip: 110;

    /* Container */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;

    /* Navbar */
    --navbar-height: 80px;
}

/* Dark mode is default */
@media (prefers-color-scheme: light) {
    /* Keep dark theme regardless of system preference */
}