/**
 * Global Futuristic Design System
 * Dark theme with neon accents and glassmorphism effects
 */

/* ========================================
   CSS VARIABLES
======================================== */
:root {
    /* Primary Colors */
    --primary-glow: #00d4ff;
    --secondary-glow: #7b2ff7;
    --accent-glow: #ff006e;

    /* Background Colors */
    --bg-primary: #0a0a1e;
    --bg-secondary: #0f0f2a;
    --bg-tertiary: #1a1a3e;
    --bg-gradient: linear-gradient(135deg, #0a0a1e 0%, #1a1a3e 100%);

    /* Glass Effect */
    --glass-bg: rgba(15, 15, 42, 0.7);
    --glass-border: rgba(0, 212, 255, 0.2);

    /* Text Colors */
    --text-light: #ffffff;
    --text-muted: #a0a0c8;
    --text-dark: #6b6b8f;

    /* Status Colors */
    --success: #00ff88;
    --warning: #ffaa00;
    --error: #ff3366;

    /* Shadows & Effects */
    --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --glow-primary: 0 0 20px rgba(0, 212, 255, 0.5);
    --glow-secondary: 0 0 20px rgba(123, 47, 247, 0.5);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Orbitron', 'Inter', sans-serif;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ========================================
   RESET & BASE STYLES
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
            radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
            radial-gradient(circle at 80% 70%, rgba(123, 47, 247, 0.08) 0%, transparent 50%),
            radial-gradient(circle at 50% 50%, rgba(255, 0, 110, 0.05) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
    animation: bgPulse 15s ease-in-out infinite;
}

@keyframes bgPulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* Grid Pattern Overlay */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
            linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
            linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

/* Main Content Wrapper */
main {
    position: relative;
    z-index: 1;
    min-height: calc(100vh - 80px);
    padding-bottom: 8rem;
}

/* ========================================
   TYPOGRAPHY
======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 0.5px;
    color: var(--text-light);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    background: linear-gradient(135deg, var(--primary-glow), var(--secondary-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
    text-shadow: var(--glow-primary);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: var(--spacing-sm);
}

h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

a {
    color: var(--primary-glow);
    text-decoration: none;
    transition: all var(--transition-fast);
}

a:hover {
    color: var(--secondary-glow);
    text-shadow: var(--glow-primary);
}

/* ========================================
   BUTTONS
======================================== */
.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 2px solid var(--primary-glow);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--primary-glow);
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-normal);
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--primary-glow), transparent);
    transition: left var(--transition-slow);
    z-index: -1;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    background: var(--primary-glow);
    color: var(--bg-primary);
    box-shadow: var(--glow-primary);
    transform: translateY(-2px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-glow), var(--secondary-glow));
    border: none;
    color: white;
}

.btn-primary:hover {
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.6);
    transform: translateY(-2px) scale(1.05);
}

.btn-secondary {
    border-color: var(--secondary-glow);
    color: var(--secondary-glow);
}

.btn-secondary:hover {
    background: var(--secondary-glow);
    box-shadow: var(--glow-secondary);
}

/* ========================================
   CARDS
======================================== */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, transparent, rgba(0, 212, 255, 0.05), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-glow);
    box-shadow: 0 12px 40px rgba(0, 212, 255, 0.3);
}

.card:hover::before {
    opacity: 1;
}

/* ========================================
   SECTIONS
======================================== */
.section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.section-title {
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Decorative Line */
.section-title::after {
    content: '';
    display: block;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--primary-glow), transparent);
    margin: var(--spacing-sm) auto 0;
    border-radius: 2px;
}

/* ========================================
   GRID SYSTEMS
======================================== */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ========================================
   UTILITY CLASSES
======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.glow-text {
    text-shadow: 0 0 20px currentColor;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-glow), var(--secondary-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   RESPONSIVE DESIGN
======================================== */
@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .section {
        padding: var(--spacing-lg) 0;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   SCROLLBAR STYLING
======================================== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-glow), var(--secondary-glow));
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-glow);
}

/* ========================================
   SELECTION
======================================== */
::selection {
    background: var(--primary-glow);
    color: var(--bg-primary);
}

::-moz-selection {
    background: var(--primary-glow);
    color: var(--bg-primary);
}

/* ========================================
   LOADING STATES
======================================== */
@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

.skeleton {
    background: linear-gradient(90deg, var(--bg-secondary) 0%, var(--bg-tertiary) 50%, var(--bg-secondary) 100%);
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
    border-radius: var(--radius-md);
}

/* ========================================
   ACCESSIBILITY
======================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus Styles */
*:focus-visible {
    outline: 2px solid var(--primary-glow);
    outline-offset: 2px;
}

/* ========================================
   PRINT STYLES
======================================== */
@media print {
    body {
        background: white;
        color: black;
    }

    .no-print {
        display: none !important;
    }
}

/* Light theme overrides */
:root[data-theme="light"] {
    --bg-primary: #f3f5ff;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e4e7ff;
    --text-light: #10121f;
    --text-muted: #4b4f6b;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.06);
}

:root[data-theme="light"] body {
    background: var(--bg-primary);
    color: var(--text-light);
}

:root[data-theme="light"] body::before,
:root[data-theme="light"] body::after {
    opacity: 0.4;
}

@media (max-width: 768px) {
    main {
        padding-top: 6.5rem;
    }
}