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

:root {
    --primary: #6B46FF;
    --blue-start: #0EA5E9;
    --blue-end: #2563EB;
    --pink-start: #EC4899;
    --pink-end: #EF4444;
    --purple-start: #8B5CF6;
    --purple-end: #6366F1;
    --orange-start: #F59E0B;
    --orange-end: #EA580C;
    --text-dark: #1F2937;
    --text-gray: #6B7280;
    --bg-light: #F9FAFB;
    --white: #FFFFFF;
    
    /* Customizable colors */
    --hero-bg: #F9FAFB;
    --card-english: #0EA5E9;
    --card-chinese: #EC4899;
    --card-chess: #8B5CF6;
    --card-dombra: #F59E0B;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--white);
    padding: 20px 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

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

.logo-icon svg {
    display: block;
}

.logo-text {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Language Switcher */
.language-switcher {
    display: flex;
    gap: 4px;
    background: #F3F4F6;
    padding: 4px;
    border-radius: 8px;
}

.lang-btn {
    padding: 6px 12px;
    border: none;
    background: transparent;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    color: #6B7280;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    background: #E5E7EB;
}

.lang-btn.active {
    background: var(--primary);
    color: white;
}

.admin-link {
    opacity: 0.5;
    font-size: 14px;
}

.admin-link:hover {
    opacity: 1;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 16px;
}

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

.btn-primary:hover {
    background: #5835E0;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(107, 70, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

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

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--hero-bg) 0%, #E5E7EB 100%);
    padding: 80px 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text-dark);
}

.highlight {
    background: linear-gradient(135deg, var(--primary) 0%, #8B5CF6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-gray);
    margin-bottom: 40px;
    line-height: 1.8;
}

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

/* Section Titles */
.section-title {
    font-size: 40px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 18px;
    text-align: center;
    color: var(--text-gray);
    margin-bottom: 48px;
}

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

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.course-card {
    padding: 32px;
    border-radius: 16px;
    color: var(--white);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

.card-blue {
    background: linear-gradient(135deg, var(--card-english) 0%, var(--blue-end) 100%);
}

.card-pink {
    background: linear-gradient(135deg, var(--card-chinese) 0%, var(--pink-end) 100%);
}

.card-purple {
    background: linear-gradient(135deg, var(--card-chess) 0%, var(--purple-end) 100%);
}

.card-orange {
    background: linear-gradient(135deg, var(--card-dombra) 0%, var(--orange-end) 100%);
}

.card-icon {
    margin-bottom: 20px;
}

.card-icon svg {
    display: block;
}

.card-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.card-description {
    font-size: 16px;
    line-height: 1.6;
    opacity: 0.95;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
}

.feature-item {
    text-align: center;
    padding: 24px;
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.feature-item p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* Personal Account Section */
.personal-account {
    padding: 80px 0;
    background: var(--white);
}

.account-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.account-card {
    background: linear-gradient(135deg, #F9FAFB 0%, #FFFFFF 100%);
    padding: 40px;
    border-radius: 16px;
    border: 2px solid #E5E7EB;
    transition: all 0.3s ease;
}

.account-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.account-card h3 {
    font-size: 24px;
    margin-bottom: 24px;
    color: var(--primary);
}

.account-card ul {
    list-style: none;
    margin-bottom: 32px;
}

.account-card ul li {
    padding: 12px 0;
    padding-left: 28px;
    position: relative;
    color: var(--text-gray);
}

.account-card ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background: var(--bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-top: 48px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact-item {
    display: flex;
    gap: 16px;
}

.contact-icon {
    font-size: 32px;
    flex-shrink: 0;
}

.contact-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.contact-item p {
    color: var(--text-gray);
    line-height: 1.6;
}

.contact-item a {
    color: var(--primary);
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

.link {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
}

.link:hover {
    text-decoration: underline;
}

.contact-map iframe {
    width: 100%;
    height: 100%;
    min-height: 400px;
    border-radius: 12px;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 48px 0 24px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
    align-items: center;
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 600;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-copy {
    color: #9CA3AF;
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn-large {
        width: 100%;
    }
    
    .account-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 16px;
    }
}

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

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

.course-card {
    animation: fadeInUp 0.8s ease;
}

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