/* ============================================
   NEUROVEDIK Website - Global Styles
   ============================================ */

:root {
    /* Colors */
    --bg-dark: #0a0a0f;
    --bg-darker: #050508;
    --bg-card: #111118;
    --bg-card-hover: #1a1a24;
    --bg-elevated: #16161f;
    
    --text-primary: #ffffff;
    --text-secondary: #888899;
    --text-muted: #555566;
    --text-dim: #333344;
    
    --accent-cyan: #00F0FF;
    --accent-purple: #7B2FFF;
    --accent-magenta: #BC13FE;
    --accent-gold: #FFD700;
    --accent-orange: #FF6600;
    --accent-green: #00FF88;
    --accent-red: #FF4757;
    
    --gradient-neon: linear-gradient(135deg, #00F0FF 0%, #7B2FFF 50%, #BC13FE 100%);
    --gradient-gold: linear-gradient(135deg, #FFD700 0%, #FF6600 100%);
    --gradient-green: linear-gradient(135deg, #00FF88 0%, #00F0FF 100%);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow-cyan: 0 0 30px rgba(0, 240, 255, 0.3);
    --shadow-glow-purple: 0 0 30px rgba(123, 47, 255, 0.3);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
}

code, pre {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ============================================
   Background Effects
   ============================================ */

.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -2;
    pointer-events: none;
}

.bg-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(150px);
    opacity: 0.12;
    z-index: -1;
    pointer-events: none;
    animation: float 25s ease-in-out infinite;
}

.bg-glow-1 {
    top: -200px;
    right: -200px;
    background: var(--accent-cyan);
}

.bg-glow-2 {
    bottom: -200px;
    left: -200px;
    background: var(--accent-purple);
    animation-delay: -12s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* ============================================
   Container
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 1000;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 800;
    font-size: 1.25rem;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-gold);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 1.25rem;
    color: var(--bg-dark);
}

.logo-text {
    background: var(--gradient-neon);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-cyan);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-cyan);
    border-radius: var(--radius-full);
}

.nav-actions {
    display: flex;
    gap: var(--spacing-md);
}

.btn-github {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 0.875rem;
    transition: all var(--transition-normal);
}

.btn-github:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: var(--gradient-neon);
    color: var(--bg-dark);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-cyan);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-purple);
}

.btn-outline {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.125rem;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-4xl);
    padding: calc(70px + var(--spacing-4xl)) var(--spacing-xl) var(--spacing-4xl);
    max-width: 1400px;
    margin: 0 auto;
}

.hero-content {
    flex: 1;
    max-width: 650px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.3);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--accent-cyan);
    margin-bottom: var(--spacing-xl);
}

.hero-title {
    font-size: clamp(3rem, 7vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
}

.gradient-text {
    background: var(--gradient-neon);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.hero-subtitle strong {
    color: var(--text-primary);
}

.hero-tagline {
    font-size: 1.125rem;
    color: var(--accent-gold);
    font-weight: 500;
    margin-bottom: var(--spacing-2xl);
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.hero-visual {
    flex: 1;
    max-width: 500px;
}

.code-preview {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.code-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.code-header .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-header .dot.red { background: #ff5f57; }
.code-header .dot.yellow { background: #febc2e; }
.code-header .dot.green { background: #28c840; }

.code-header .filename {
    margin-left: auto;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.code-content {
    padding: var(--spacing-lg);
    font-size: 0.9rem;
    line-height: 1.8;
    overflow-x: auto;
}

.code-content .keyword { color: var(--accent-purple); }
.code-content .string { color: var(--accent-green); }
.code-content .function { color: var(--accent-cyan); }
.code-content .comment { color: var(--text-muted); font-style: italic; }
.code-content .number { color: var(--accent-gold); }

/* ============================================
   Stats Section
   ============================================ */

.stats {
    padding: var(--spacing-4xl) var(--spacing-xl);
    background: rgba(17, 17, 24, 0.5);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-xl);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-neon);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: var(--spacing-sm);
}

.stat-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    width: var(--width);
    background: var(--gradient-neon);
}

/* ============================================
   Section Headers
   ============================================ */

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.section-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-lg);
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-cyan);
    margin-bottom: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

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

/* ============================================
   Features Section
   ============================================ */

.features {
    padding: var(--spacing-4xl) var(--spacing-xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0, 240, 255, 0.2);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
}

.feature-icon.cyan { background: rgba(0, 240, 255, 0.15); color: var(--accent-cyan); }
.feature-icon.purple { background: rgba(123, 47, 255, 0.15); color: var(--accent-purple); }
.feature-icon.gold { background: rgba(255, 215, 0, 0.15); color: var(--accent-gold); }
.feature-icon.green { background: rgba(0, 255, 136, 0.15); color: var(--accent-green); }
.feature-icon.magenta { background: rgba(188, 19, 254, 0.15); color: var(--accent-magenta); }
.feature-icon.orange { background: rgba(255, 102, 0, 0.15); color: var(--accent-orange); }

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.feature-link {
    color: var(--accent-cyan);
    font-weight: 500;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.feature-link:hover {
    color: var(--accent-purple);
}

/* ============================================
   Algorithms Section
   ============================================ */

.algorithms {
    padding: var(--spacing-4xl) var(--spacing-xl);
    background: rgba(17, 17, 24, 0.3);
}

.algo-showcase {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.algo-diagram {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.algo-layer {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.algo-layer span {
    width: 120px;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: right;
}

.algo-box {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.layer-1 .algo-box { border-left: 3px solid var(--accent-cyan); }
.layer-2 .algo-box { border-left: 3px solid var(--accent-purple); }
.layer-3 .algo-box { border-left: 3px solid var(--accent-gold); }
.layer-4 .algo-box { border-left: 3px solid var(--accent-green); }

.algo-table-wrapper {
    overflow-x: auto;
}

.algo-table {
    width: 100%;
    border-collapse: collapse;
}

.algo-table th,
.algo-table td {
    padding: var(--spacing-lg);
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.algo-table th {
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.algo-table td {
    color: var(--text-secondary);
}

.algo-table code {
    color: var(--accent-green);
    background: rgba(0, 255, 136, 0.1);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
}

.algo-name {
    color: var(--text-primary);
    font-weight: 600;
}

/* ============================================
   Use Cases Section
   ============================================ */

.use-cases {
    padding: var(--spacing-4xl) var(--spacing-xl);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.use-case-card {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.use-case-card:hover {
    border-color: rgba(0, 240, 255, 0.2);
    transform: translateX(5px);
}

.use-case-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.use-case-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.use-case-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================================
   CTA Section
   ============================================ */

.cta {
    padding: var(--spacing-4xl) var(--spacing-xl);
    background: linear-gradient(180deg, transparent 0%, rgba(17, 17, 24, 0.5) 100%);
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.cta p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-2xl);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    padding: var(--spacing-4xl) var(--spacing-xl) var(--spacing-xl);
    background: var(--bg-darker);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--spacing-3xl);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-lg);
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 280px;
    margin-bottom: var(--spacing-lg);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    transition: all var(--transition-normal);
}

.footer-social a:hover {
    background: var(--accent-cyan);
    color: var(--bg-dark);
}

.footer-links h4 {
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-lg);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-cyan);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-2xl);
    margin-top: var(--spacing-3xl);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-size: 0.875rem;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: calc(70px + var(--spacing-3xl));
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-visual {
        max-width: 100%;
        width: 100%;
    }
    
    .algo-showcase {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links,
    .nav-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero {
        padding: calc(70px + var(--spacing-xl)) var(--spacing-md) var(--spacing-2xl);
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .stat-value {
        font-size: 2rem;
    }
}