/* =============================================
   CSS Variables & Reset
   ============================================= */
:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #f8fafc;
    --background-start: #667eea;
    --background-end: #764ba2;
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
    --glass-blur: 12px;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background: var(--background-end);
    overscroll-behavior: none;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--background-start) 0%, var(--background-end) 100%);
    background-attachment: fixed;
    min-height: 100vh;
    overscroll-behavior: none;
}

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

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

ul {
    list-style: none;
}

/* =============================================
   Utility Classes
   ============================================= */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

/* Fallback for browsers without backdrop-filter support */
@supports not (backdrop-filter: blur(12px)) {
    .glass-card {
        background: rgba(255, 255, 255, 0.85);
    }
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-light);
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

/* =============================================
   Buttons
   ============================================= */
.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-light);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-light);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

/* =============================================
   Navigation
   ============================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-light);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav-toggle {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    z-index: 1002;
}

.nav-toggle.active {
    z-index: 1002;
}

.hamburger {
    width: 24px;
    height: 18px;
    position: relative;
    display: inline-block;
}

.hamburger::before,
.hamburger::after,
.hamburger {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--text-light);
    border-radius: 2px;
    transition: all var(--transition-fast);
    left: 0;
}

.hamburger::before {
    top: 0;
    content: '';
}

.hamburger::after {
    bottom: 0;
    content: '';
}

.hamburger {
    top: 50%;
    transform: translateY(-50%);
}

.nav-toggle.active .hamburger {
    opacity: 0;
    transform: translateY(-50%) rotate(90deg);
}

.nav-toggle.active .hamburger::before {
    top: 50%;
    transform: rotate(45deg) translateY(-50%);
}

.nav-toggle.active .hamburger::after {
    bottom: 50%;
    transform: rotate(-45deg) translateY(50%);
}

.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle.active .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

.nav-menu {
    position: fixed;
    top: 70px;
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    transform: translateY(-150%);
    opacity: 0;
    transition: all var(--transition-normal);
    border: 1px solid var(--glass-border);
    z-index: 1000;
}

.nav-menu.active {
    transform: translateY(0);
    opacity: 1;
}

.nav-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
    z-index: 999;
}

.nav-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

.nav-link {
    display: block;
    padding: var(--spacing-sm);
    color: var(--text-light);
    font-weight: 500;
    text-align: center;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* =============================================
   Hero Section
   ============================================= */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(70px + var(--spacing-lg)) var(--spacing-sm) var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(131, 58, 180, 0.3) 0%, transparent 50%);
    z-index: -1;
}

.hero-content {
    padding: var(--spacing-lg);
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(1.75rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--text-light);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* =============================================
   Services Section
   ============================================= */
.services {
    padding: var(--spacing-2xl) var(--spacing-sm);
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.service-card {
    padding: var(--spacing-lg);
    text-align: center;
    transition: transform var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-lg);
    color: var(--text-light);
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.service-description {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

/* =============================================
   About Section
   ============================================= */
.about {
    padding: var(--spacing-2xl) var(--spacing-sm);
}

.about-text {
    padding: var(--spacing-lg);
}

.about-text p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.about-text .section-title {
    text-align: left;
    margin-bottom: var(--spacing-md);
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-sm);
}

.stat-number {
    display: block;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-light);
    line-height: 1;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--spacing-xs);
}

/* =============================================
   Contact Section
   ============================================= */
.contact {
    padding: var(--spacing-2xl) var(--spacing-sm);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.contact-form-container {
    padding: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-light);
    font-family: inherit;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.15);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-info {
    padding: var(--spacing-lg);
}

.contact-info h3 {
    color: var(--text-light);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-md);
}

.contact-item svg {
    flex-shrink: 0;
    color: var(--accent-color);
}

/* =============================================
   Footer
   ============================================= */
.footer {
    background: rgba(0, 0, 0, 0.2);
    padding: var(--spacing-xl) var(--spacing-sm) var(--spacing-md);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-light);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--spacing-xs);
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--text-light);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* =============================================
   Animations
   ============================================= */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content {
    animation: fadeInUp 0.8s ease forwards;
}

.service-card {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

.service-card:nth-child(1) { animation-delay: 0.1s; }
.service-card:nth-child(2) { animation-delay: 0.2s; }
.service-card:nth-child(3) { animation-delay: 0.3s; }
.service-card:nth-child(4) { animation-delay: 0.4s; }

/* =============================================
   Media Queries - Tablet and Up
   ============================================= */
@media (min-width: 640px) {
    .hero-buttons {
        flex-direction: row;
        justify-content: center;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }
    
    .nav-menu {
        position: static;
        transform: none;
        opacity: 1;
        background: none;
        backdrop-filter: none;
        border: none;
        padding: 0;
        display: flex;
        gap: var(--spacing-xs);
    }
    
    .nav-link {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .hero-content {
        padding: var(--spacing-xl);
    }
    
    .contact-wrapper {
        grid-template-columns: 1.2fr 1fr;
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    .hero-content {
        max-width: 700px;
    }
    
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .about-text {
        padding: var(--spacing-xl);
        max-width: 800px;
        margin: 0 auto;
    }
    
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

/* =============================================
   Accessibility
   ============================================= */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus styles for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}