/* =============================================
   CYBERCODE ACADEMY - DARK THEME
   ============================================= */

:root {
    /* Основные цвета */
    --bg-primary: #0a0a0f;
    --bg-secondary: #0d1117;
    --bg-tertiary: #161b22;
    --bg-card: #161b22;
    --bg-card-hover: #1c2333;
    
    /* Текст */
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    
    /* Акценты */
    --accent-primary: #58a6ff;
    --accent-primary-hover: #79b8ff;
    --accent-secondary: #3fb950;
    --accent-warning: #d2991d;
    --accent-danger: #f85149;
    --accent-purple: #7928ca;
    --accent-pink: #ff0080;
    
    /* Границы */
    --border-color: #30363d;
    --border-glow: rgba(88, 166, 255, 0.3);
    --border-purple: rgba(121, 40, 202, 0.3);
    
    /* Градиенты */
    --gradient-primary: linear-gradient(135deg, #58a6ff 0%, #3fb950 100%);
    --gradient-cyber: linear-gradient(135deg, #7928ca 0%, #ff0080 100%);
    --gradient-dark: linear-gradient(135deg, #0d1117 0%, #161b22 100%);
    
    /* Шрифты */
    --font-mono: 'JetBrains Mono', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Тени */
    --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: 0 0 30px var(--border-glow);
    
    /* Анимации */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Размеры */
    --container-max: 1400px;
    --nav-height: 70px;
    --system-bar-height: 30px;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    padding-top: calc(var(--nav-height) + var(--system-bar-height));
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

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

/* System Bar */
.system-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--system-bar-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-secondary);
    z-index: 1001;
    backdrop-filter: blur(10px);
}

.system-status {
    display: flex;
    align-items: center;
    gap: 12px;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-secondary);
    border-radius: 50%;
    display: inline-block;
    animation: pulse 2s infinite;
    box-shadow: 0 0 10px var(--accent-secondary);
}

.divider {
    color: var(--border-color);
    margin: 0 4px;
}

.data-value {
    color: var(--accent-primary);
    font-weight: 700;
}

.system-time {
    color: var(--text-muted);
}

/* Navigation */
.cyber-nav {
    position: fixed;
    top: var(--system-bar-height);
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition-base);
}

.cyber-nav.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 30px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-mono);
    font-size: 24px;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 2px;
}

.logo-bracket {
    color: var(--accent-primary);
}

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

.logo-cursor {
    animation: blink 1s infinite;
    color: var(--accent-primary);
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
    padding: 4px 0;
}

.nav-link:hover {
    color: var(--accent-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: -20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    min-width: 300px;
    padding: 12px 0;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(-10px);
    transition: var(--transition-fast);
}

.dropdown:hover .dropdown-content {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.dropdown-content a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.dropdown-content a:hover {
    background: var(--bg-card-hover);
    color: var(--accent-primary);
}

.menu-icon {
    font-size: 20px;
    width: 24px;
    text-align: center;
}

/* Buttons */
.btn-primary {
    background: var(--gradient-primary);
    color: white;
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-base);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(88, 166, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-base);
    cursor: pointer;
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    background: rgba(88, 166, 255, 0.1);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--accent-primary);
    color: var(--accent-primary);
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-base);
    cursor: pointer;
}

.btn-outline:hover {
    background: var(--accent-primary);
    color: white;
}

.btn-login, .btn-register {
    padding: 8px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    transition: var(--transition-fast);
}

.btn-login {
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-login:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.btn-register {
    background: var(--accent-primary);
    color: white;
}

.btn-register:hover {
    background: var(--accent-primary-hover);
    transform: translateY(-2px);
}

/* Hero Section */
.hero-section {
    min-height: calc(100vh - var(--nav-height) - var(--system-bar-height));
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 60px 0;
}

.hero-content {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 30px;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(88, 166, 255, 0.1);
    border: 1px solid var(--accent-primary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    color: var(--accent-primary);
    margin-bottom: 24px;
}

.badge-live {
    background: var(--accent-danger);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 700;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    max-width: 800px;
}

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

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}

.stat-item {
    text-align: center;
}

.stat-icon {
    font-size: 28px;
    margin-bottom: 8px;
}

.stat-number {
    font-size: 36px;
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--accent-primary);
    display: block;
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
    display: block;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-3d {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    z-index: 1;
    opacity: 0.6;
}

/* Terminal Section */
.terminal-section {
    padding: 60px 0;
}

.section-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 30px;
}

.section-title {
    font-family: var(--font-mono);
    font-size: 36px;
    margin-bottom: 40px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.bracket {
    color: var(--accent-primary);
}

.title-badge {
    font-size: 12px;
    background: var(--accent-secondary);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: 600;
}

.terminal-window {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.terminal-header {
    background: var(--bg-tertiary);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
}

.terminal-dots {
    display: flex;
    gap: 6px;
}

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

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.terminal-title {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
}

.terminal-body {
    padding: 20px;
    font-family: var(--font-mono);
    font-size: 13px;
    max-height: 400px;
    overflow-y: auto;
}

.terminal-line {
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.prompt {
    color: var(--accent-secondary);
    font-weight: 700;
}

/* Courses Section */
.courses-section {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.courses-filter {
    display: flex;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 14px;
}

.filter-btn.active, .filter-btn:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}

.course-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 30px;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.course-card:hover::before {
    transform: scaleX(1);
}

.course-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
}

/* Адаптивность */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 48px;
    }
    
    .courses-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: calc(var(--nav-height) + var(--system-bar-height));
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .hamburger {
        display: flex;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
    }
    
    .hamburger span {
        width: 25px;
        height: 3px;
        background: var(--text-primary);
        transition: var(--transition-fast);
    }
}

/* Animations */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

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

@keyframes glitch {
    0% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
    100% { transform: translate(0); }
}

.glitch {
    animation: glitch 0.3s infinite;
}