/* ===========================================
   CSS VARIABLES - DESIGN SYSTEM
   Indigo-Purple Theme (Blue-Purple Mix)
   =========================================== */

:root {
    /* ===== Light Theme (Default) ===== */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    --accent-primary: #6366f1;
    /* Indigo */
    --accent-secondary: #8b5cf6;
    /* Purple */
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --accent-glow: rgba(99, 102, 241, 0.3);

    --border-color: #e2e8f0;
    --header-glass: rgba(255, 255, 255, 0.85);
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --card-shadow-hover: 0 8px 30px rgba(99, 102, 241, 0.15);

    /* UI Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
}

/* ===== Dark Theme ===== */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    /* Deep Navy Blue */
    --bg-secondary: #1e293b;
    /* Slate Blue */
    --bg-tertiary: #334155;
    /* Lighter Slate */
    --bg-card: #1e293b;

    --text-primary: #f1f5f9;
    /* Almost White */
    --text-secondary: #cbd5e1;
    /* Light Gray */
    --text-muted: #64748b;
    /* Muted Gray */

    --accent-primary: #818cf8;
    /* Lighter Indigo for Dark */
    --accent-secondary: #a78bfa;
    /* Lighter Purple */
    --accent-gradient: linear-gradient(135deg, #818cf8 0%, #a78bfa 100%);
    --accent-glow: rgba(129, 140, 248, 0.4);

    --border-color: #334155;
    --header-glass: rgba(15, 23, 42, 0.9);
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --card-shadow-hover: 0 8px 30px rgba(129, 140, 248, 0.2);
}

/* ===== Typography ===== */
:root {
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Outfit', 'Poppins', sans-serif;
    --font-mono: 'Fira Code', monospace;

    --font-xs: 0.75rem;
    --font-sm: 0.875rem;
    --font-base: 1rem;
    --font-lg: 1.125rem;
    --font-xl: 1.25rem;
    --font-2xl: 1.5rem;
    --font-3xl: 2rem;
    --font-4xl: 2.5rem;
    --font-5xl: 3.5rem;
}

/* ===== Spacing ===== */
:root {
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
}

/* ===== Border Radius ===== */
:root {
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
}

/* ===== Transitions ===== */
:root {
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --transition-smooth: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-elastic: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}