/* 
 * KAZrotech Core Styles
 * Base styles shared across all pages
 */

/* CSS Custom Properties */
:root {
    /* Colors */
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.6);
    
    /* Accent Colors */
    --accent-primary: #667eea;
    --accent-secondary: #764ba2;
    --accent-tertiary: #a855f7;
    --accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* Glass Effects */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-blur: blur(15px);
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.4s ease;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

/* Background Elements */
.gradient-mesh {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(120, 219, 255, 0.3) 0%, transparent 50%),
        var(--accent-gradient);
    z-index: -1;
    animation: meshFloat 20s ease-in-out infinite;
}

@keyframes meshFloat {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.1) rotate(2deg); }
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--space-md);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

a {
    color: var(--accent-tertiary);
    text-decoration: none;
    transition: color var(--transition-normal);
}

a:hover {
    color: #c084fc;
}

/* Header */
header {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    padding: var(--space-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--glass-border);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 800;
    font-size: 1.5rem;
    transition: transform var(--transition-normal);
}

.logo:hover {
    transform: scale(1.05);
}

.logo img {
    height: 40px;
    margin-right: var(--space-md);
    border-radius: var(--radius-sm);
}

.logo-text {
    background: linear-gradient(135deg, #ffffff 0%, var(--accent-tertiary) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Navigation */
.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
    align-items: center;
}

.nav-links a {
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    position: relative;
}

.nav-links a::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-tertiary);
    transition: all var(--transition-normal);
    transform: translateX(-50%);
}

.nav-links a:hover::before {
    width: 100%;
}

.nav-links a:hover {
    background: var(--glass-bg);
    color: var(--accent-tertiary);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
    transition: background var(--transition-normal);
}

.mobile-menu-toggle:hover {
    background: var(--glass-bg);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::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 ease;
}

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

.btn-primary {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--accent-tertiary);
    border: 2px solid var(--accent-tertiary);
}

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

/* Cards */
.card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: 1px solid var(--glass-border);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #4f46e5, #7c3aed, #ec4899);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

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

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    background: rgba(255, 255, 255, 0.15);
}

/* Sections */
.section {
    padding: var(--space-2xl) 0;
}

.section-title {
    text-align: center;
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: var(--space-xl);
    background: linear-gradient(135deg, #ffffff 0%, var(--accent-tertiary) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    text-align: center;
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto var(--space-xl) auto;
    color: var(--text-secondary);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

/* Scroll Indicator */
.scroll-indicator {
    position: fixed;
    top: 0;
    left: 0;
    height: 4px;
    background: linear-gradient(90deg, #4f46e5, #7c3aed, #ec4899);
    z-index: 9999;
    transition: width 0.3s ease;
}

/* Footer */
footer {
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: var(--glass-blur);
    padding: var(--space-2xl) 0 var(--space-lg) 0;
    margin-top: var(--space-2xl);
    border-top: 1px solid var(--glass-border);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-links {
        display: none;
    }
    
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.75rem; }
    
    .section-title {
        font-size: 2.5rem;
    }
    
    .btn {
        padding: var(--space-md) var(--space-md);
        font-size: 0.9rem;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    h1 { font-size: 2rem; }
    .section-title { font-size: 2rem; }
    
    .card {
        padding: var(--space-lg);
    }
}

/* Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.opacity-50 { opacity: 0.5; }
.opacity-70 { opacity: 0.7; }
.opacity-90 { opacity: 0.9; }

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { transform: translateX(-20px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-slide-in {
    animation: slideIn 0.6s ease-out;
}