/* ===================================
   CSS Variables & Reset
   =================================== */
:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --text-dark: #1a1a1a;
    --text-light: #ffffff;
    --text-gray: #6b7280;
    --bg-light: #ffffff;
    --bg-dark: #0f0f0f;
    --overlay-dark: rgba(0, 0, 0, 0.5);
    --border-color: #e5e7eb;
    
    /* Typography */
    --font-display: 'Syne', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Breakpoints */
    --bp-mobile: 768px;
    --bp-tablet: 1024px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-medium);
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

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

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-light);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-medium);
}

.navbar.scrolled {
    padding: var(--spacing-xs) 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

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

.logo img {
    height: 50px;
    width: auto;
    transition: all var(--transition-medium);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-link {
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
    padding: var(--spacing-xs) 0;
}

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

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

.language-selector {
    position: relative;
}

.lang-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 8px;
    transition: background var(--transition-fast);
}

.lang-button:hover {
    background: #f3f4f6;
}

.flag-icon {
    width: 24px;
    height: auto;
    border-radius: 2px;
}

.dropdown-arrow {
    font-size: 0.75rem;
    color: var(--text-gray);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--bg-light);
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    padding: var(--spacing-xs);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-medium);
}

.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: 6px;
    transition: background var(--transition-fast);
}

.lang-option:hover {
    background: #f3f4f6;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-video-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--overlay-dark);
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: var(--text-light);
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.title-line {
    display: block;
    animation: slideInLeft 0.8s ease-out backwards;
}

.title-line:nth-child(2) {
    animation-delay: 0.2s;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    margin-bottom: var(--spacing-lg);
    color: rgba(255, 255, 255, 0.9);
    animation: fadeIn 1s ease-out 0.4s backwards;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--primary-color);
    color: var(--text-light);
    font-weight: 600;
    font-size: 1.125rem;
    border-radius: 50px;
    transition: all var(--transition-medium);
    animation: fadeIn 1s ease-out 0.6s backwards;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.cta-button:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.4);
}

/* ===================================
   Services Section
   =================================== */
.services {
    padding: var(--spacing-xl) 0;
    background: var(--bg-light);
}

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

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

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

.service-card {
    background: var(--bg-light);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-medium);
    animation: fadeInUp 0.6s ease-out backwards;
}

.service-card:nth-child(2) {
    animation-delay: 0.2s;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
}

.service-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.service-card:hover .service-image img {
    transform: scale(1.1);
}

.service-content {
    padding: var(--spacing-md);
}

.service-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.service-description {
    color: var(--text-gray);
    line-height: 1.7;
}

/* ===================================
   Join Section
   =================================== */
.join-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-light);
}

.join-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.join-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.join-subtitle {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

.join-form {
    width: 100%;
}

.form-group {
    display: flex;
    gap: var(--spacing-sm);
    background: var(--bg-light);
    padding: var(--spacing-xs);
    border-radius: 50px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.form-input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    font-size: 1rem;
    outline: none;
    color: var(--text-dark);
}

.form-input::placeholder {
    color: var(--text-gray);
}

.form-submit {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--primary-color);
    color: var(--text-light);
    font-weight: 600;
    border-radius: 50px;
    transition: all var(--transition-medium);
}

.form-submit:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: var(--spacing-xl) 0 var(--spacing-md);
    background: var(--bg-dark);
    color: var(--text-light);
}

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

.footer-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-text {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-md);
}

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

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.contact-label {
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.6);
}

.contact-link {
    color: var(--text-light);
    font-size: 1.125rem;
}

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

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

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

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

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

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

/* ===================================
   Animations
   =================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-light);
        flex-direction: column;
        padding: var(--spacing-xl) var(--spacing-md);
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
        transition: right var(--transition-medium);
        align-items: flex-start;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    .hero {
        min-height: 500px;
    }
    
    .form-group {
        flex-direction: column;
        border-radius: 20px;
    }
    
    .form-submit {
        width: 100%;
        border-radius: 15px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .logo img {
        height: 40px;
    }
}