/* ==========================================
   PCFM Design Tokens
   Unified design system variables
   ========================================== */

:root {
    /* ==========================================
       Color System - Primary Palette
       ========================================== */

    /* Brand Colors */
    --color-primary: #6366f1;        /* Indigo - main brand */
    --color-primary-light: #818cf8;
    --color-primary-dark: #4f46e5;
    --color-primary-darker: #4338ca;

    --color-secondary: #8b5cf6;      /* Purple - secondary brand */
    --color-secondary-light: #a78bfa;
    --color-secondary-dark: #7c3aed;

    /* Semantic Colors */
    --color-success: #10b981;        /* Green */
    --color-success-light: #34d399;
    --color-success-dark: #059669;

    --color-danger: #ef4444;         /* Red */
    --color-danger-light: #f87171;
    --color-danger-dark: #dc2626;

    --color-warning: #f59e0b;        /* Orange */
    --color-warning-light: #fbbf24;
    --color-warning-dark: #d97706;

    --color-info: #06b6d4;           /* Cyan */
    --color-info-light: #22d3ee;
    --color-info-dark: #0891b2;

    /* Accent Colors */
    --color-accent-cyan: #06b6d4;
    --color-accent-pink: #ec4899;
    --color-accent-purple: #a855f7;
    --color-accent-orange: #f59e0b;

    /* ==========================================
       Background Colors
       ========================================== */

    /* Dark Theme Backgrounds */
    --bg-primary: #0a0e27;           /* Darkest - body background */
    --bg-secondary: #131729;         /* Dark - sections */
    --bg-tertiary: #1a1f3a;          /* Medium dark - cards */
    --bg-card: rgba(26, 31, 58, 0.6);

    /* Glass Effect Backgrounds */
    --bg-glass: rgba(255, 255, 255, 0.05);
    --bg-glass-intense: rgba(255, 255, 255, 0.08);
    --bg-glass-subtle: rgba(255, 255, 255, 0.03);

    /* ==========================================
       Text Colors
       ========================================== */

    --text-primary: #f8fafc;         /* Brightest - headings */
    --text-secondary: #cbd5e1;       /* Medium - body text */
    --text-tertiary: #94a3b8;        /* Muted - less important */
    --text-muted: #64748b;           /* Most muted - hints */
    --text-inverse: #0f172a;         /* For light backgrounds */

    /* ==========================================
       Border & Divider Colors
       ========================================== */

    --border-primary: rgba(255, 255, 255, 0.1);
    --border-secondary: rgba(255, 255, 255, 0.05);
    --border-muted: rgba(255, 255, 255, 0.02);

    /* Glass borders */
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-border-light: rgba(255, 255, 255, 0.15);

    /* ==========================================
       Spacing Scale - Golden Ratio Based
       ========================================== */

    --space-0: 0;
    --space-xs: 0.25rem;     /* 4px */
    --space-sm: 0.5rem;      /* 8px */
    --space-md: 1rem;        /* 16px */
    --space-lg: 1.5rem;      /* 24px */
    --space-xl: 2rem;        /* 32px */
    --space-2xl: 3rem;       /* 48px */
    --space-3xl: 4rem;       /* 64px */
    --space-4xl: 6rem;       /* 96px */

    /* ==========================================
       Typography Scale
       ========================================== */

    /* Font Families */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;

    /* Font Sizes */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 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 */

    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;

    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;

    /* ==========================================
       Border Radius Scale
       ========================================== */

    --radius-none: 0;
    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    /* ==========================================
       Shadow System
       ========================================== */

    /* Standard Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.2);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);

    /* Glow Effects */
    --glow-primary: 0 0 20px rgba(99, 102, 241, 0.3);
    --glow-success: 0 0 20px rgba(16, 185, 129, 0.3);
    --glow-danger: 0 0 20px rgba(239, 68, 68, 0.3);
    --glow-warning: 0 0 20px rgba(245, 158, 11, 0.3);
    --glow-info: 0 0 20px rgba(6, 182, 212, 0.3);
    --glow-purple: 0 0 20px rgba(139, 92, 246, 0.3);
    --glow-cyan: 0 0 20px rgba(6, 182, 212, 0.3);

    /* Inner Shadows */
    --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-inner-lg: inset 0 4px 8px rgba(0, 0, 0, 0.12);

    /* ==========================================
       Z-Index Scale
       ========================================== */

    --z-base: 0;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
    --z-max: 9999;

    /* ==========================================
       Transition & Animation
       ========================================== */

    /* Durations */
    --duration-fast: 150ms;
    --duration-base: 250ms;
    --duration-slow: 350ms;
    --duration-slower: 500ms;

    /* Easing Functions */
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* ==========================================
       Glass Effect System
       ========================================== */

    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-blur: blur(10px);
    --glass-blur-lg: blur(20px);
    --glass-blur-xl: blur(40px);

    /* ==========================================
       Gradients
       ========================================== */

    /* Brand Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-dark) 100%);
    --gradient-success: linear-gradient(135deg, var(--color-success) 0%, var(--color-success-dark) 100%);
    --gradient-danger: linear-gradient(135deg, var(--color-danger) 0%, var(--color-danger-dark) 100%);

    /* Colorful Gradients */
    --gradient-purple-pink: linear-gradient(135deg, #667eea 0%, #ec4899 100%);
    --gradient-cyan-blue: linear-gradient(135deg, #06b6d4 0%, #4f46e5 100%);
    --gradient-green-cyan: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
    --gradient-orange-red: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);

    /* Background Gradients */
    --gradient-dark: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    --gradient-subtle: linear-gradient(180deg, transparent 0%, rgba(255, 255, 255, 0.02) 100%);

    /* ==========================================
       Responsive Breakpoints (for JS)
       ========================================== */

    --breakpoint-xs: 475px;
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;

    /* ==========================================
       Component Specific Tokens
       ========================================== */

    /* Buttons */
    --btn-padding-x: var(--space-lg);
    --btn-padding-y: var(--space-sm);
    --btn-border-radius: var(--radius-md);
    --btn-font-weight: var(--font-medium);

    /* Cards */
    --card-padding: var(--space-xl);
    --card-border-radius: var(--radius-lg);
    --card-bg: var(--bg-glass);

    /* Inputs */
    --input-padding-x: var(--space-md);
    --input-padding-y: var(--space-sm);
    --input-border-radius: var(--radius-md);
    --input-border-color: var(--border-primary);
    --input-focus-color: var(--color-primary);

    /* Modals */
    --modal-padding: var(--space-2xl);
    --modal-border-radius: var(--radius-xl);
    --modal-backdrop: rgba(0, 0, 0, 0.8);
}

/* ==========================================
   Light Theme Override (Optional)
   ========================================== */

[data-theme="light"] {
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: rgba(255, 255, 255, 0.9);

    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-tertiary: #64748b;
    --text-muted: #94a3b8;

    /* Borders */
    --border-primary: rgba(0, 0, 0, 0.1);
    --border-secondary: rgba(0, 0, 0, 0.05);

    /* Glass Effect */
    --bg-glass: rgba(0, 0, 0, 0.03);
    --glass-border: rgba(0, 0, 0, 0.1);
}

/* ==========================================
   Utility Classes Using Design Tokens
   ========================================== */

/* Glass Effect Utility */
.glass {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.glass-intense {
    background: var(--bg-glass-intense);
    border: 1px solid var(--glass-border-light);
    backdrop-filter: var(--glass-blur-lg);
    -webkit-backdrop-filter: var(--glass-blur-lg);
}

/* Shadow Utilities */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* Glow Utilities */
.glow-primary { box-shadow: var(--glow-primary); }
.glow-success { box-shadow: var(--glow-success); }
.glow-danger { box-shadow: var(--glow-danger); }
.glow-info { box-shadow: var(--glow-info); }

/* ==========================================
   GPU Acceleration & Performance
   ========================================== */

/* Force GPU acceleration for animated elements */
.card,
.card-molecular,
.btn,
.btn-molecular,
.modal,
.dropdown-menu,
[class*="animate-"] {
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

/* Hint browser about properties that will change */
.card:hover,
.btn:hover,
.card-molecular:hover {
    will-change: transform;
}

/* Optimize animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateZ(0);
    }
    to {
        opacity: 1;
        transform: translateZ(0);
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(100%) translateZ(0);
        opacity: 0;
    }
    to {
        transform: translateX(0) translateZ(0);
        opacity: 1;
    }
}

@keyframes slideInLeft {
    from {
        transform: translateX(-100%) translateZ(0);
        opacity: 0;
    }
    to {
        transform: translateX(0) translateZ(0);
        opacity: 1;
    }
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: var(--glow-primary);
    }
    50% {
        box-shadow: 0 0 30px rgba(99, 102, 241, 0.6);
    }
}

/* Animation Utilities */
.animate-fade {
    animation: fadeIn var(--duration-base) var(--ease-out);
}

.animate-slide-right {
    animation: slideInRight var(--duration-slow) var(--ease-out);
}

.animate-slide-left {
    animation: slideInLeft var(--duration-slow) var(--ease-out);
}

.animate-pulse {
    animation: pulse-glow 2s ease-in-out infinite;
}

/* ==========================================
   Component Library - Consolidated
   ========================================== */

/* Cards - 2 variants only */
.card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    transition: transform var(--duration-base) var(--ease-out),
                box-shadow var(--duration-base) var(--ease-out);
    transform: translateZ(0); /* GPU acceleration */
}

.card:hover {
    transform: translateY(-4px) translateZ(0);
    box-shadow: var(--shadow-xl);
}

.card-glow {
    position: relative;
}

.card-glow::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    opacity: 0;
    z-index: -1;
    transition: opacity var(--duration-base) var(--ease-out);
}

.card-glow:hover::after {
    opacity: 0.15;
}

/* Legacy aliases - map old classes to new ones */
.card-molecular {
    /* Now just uses .card styles */
}

.card-molecular-glow {
    /* Now just uses .card-glow styles */
}

/* Buttons - 3 variants */
.btn {
    border-radius: var(--radius-md);
    font-weight: var(--font-medium);
    padding: var(--space-sm) var(--space-lg);
    transition: all var(--duration-fast) var(--ease-out);
    transform: translateZ(0); /* GPU acceleration */
}

.btn:hover {
    transform: translateY(-2px) translateZ(0);
    box-shadow: var(--shadow-md);
}

.btn-primary {
    background: var(--gradient-primary);
    border: none;
    color: white;
}

.btn-primary:hover {
    box-shadow: var(--glow-primary), var(--shadow-lg);
}

.btn-ghost {
    background: transparent;
    border: 2px solid var(--border-primary);
    color: var(--text-primary);
}

.btn-ghost:hover {
    background: var(--bg-glass);
    border-color: var(--color-primary);
}

/* Legacy button aliases */
.btn-molecular {
    /* Uses default .btn styles */
}

.btn-molecular-primary {
    /* Maps to .btn-primary */
}

/* ==========================================
   Utility Classes - Remove Inline Styles
   ========================================== */

/* Glass Effects */
.glass-navbar {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

.glass-dropdown {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
}

/* Font Weights */
.fw-medium { font-weight: var(--font-medium); } /* 500 */
.fw-semibold { font-weight: var(--font-semibold); } /* 600 */
.fw-extrabold { font-weight: var(--font-extrabold); } /* 800 */

/* Text Colors */
.text-primary-custom { color: var(--text-primary); }
.text-secondary-custom { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-muted-custom { color: var(--text-muted); }

/* Spacing */
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }
.px-md { padding-left: var(--space-md); padding-right: var(--space-md); }
.py-md { padding-top: var(--space-md); padding-bottom: var(--space-md); }
.m-md { margin: var(--space-md); }
.m-lg { margin: var(--space-lg); }
.mb-lg { margin-bottom: var(--space-lg); }
.mt-lg { margin-top: var(--space-lg); }

/* Border Radius */
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }

/* Flexbox */
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-column { flex-direction: column; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }

/* Credits Badge */
.credits-badge {
    background: var(--glass-bg);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    transition: all var(--duration-base) var(--ease-out);
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

/* Icon Colors */
.icon-warning { color: var(--color-warning); }
.icon-success { color: var(--color-success); }
.icon-danger { color: var(--color-danger); }
.icon-info { color: var(--color-info); }