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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

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

header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.download-section, .register-section {
    background: white;
    padding: 30px;
    margin-bottom: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.download-section h2, .register-section h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.download-card {
    text-align: center;
    padding: 25px;
    border: 2px solid #f0f0f0;
    border-radius: 10px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

.platform-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.download-card h3 {
    margin-bottom: 10px;
    color: #333;
}

.download-card p {
    color: #666;
    margin-bottom: 20px;
}

.download-btn, .register-btn {
    display: inline-block;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 25px;
    font-weight: bold;
    transition: all 0.3s ease;
    color: white;
}

.download-btn.android {
    background: linear-gradient(45deg, #4CAF50, #45a049);
}

.download-btn.ios {
    background: linear-gradient(45deg, #007AFF, #0056CC);
}

.download-btn.windows {
    background: linear-gradient(45deg, #0078D4, #005A9E);
}

.download-btn.macos {
    background: linear-gradient(45deg, #000000, #333333);
}

.download-btn.web {
    background: linear-gradient(45deg, #9C27B0, #7B1FA2);
}

.register-btn {
    background: linear-gradient(45deg, #FF6B35, #E55100);
    font-size: 1.1rem;
    padding: 15px 30px;
}

.register-btn.ebc {
    background: linear-gradient(45deg, #E91E63, #C2185B);
    font-size: 0.9rem;
    padding: 10px 20px;
}

.register-btn.zfx {
    background: linear-gradient(45deg, #2196F3, #1976D2);
    font-size: 0.9rem;
    padding: 10px 20px;
}

.register-btn.wisuno {
    background: linear-gradient(45deg, #FF9800, #F57C00);
    font-size: 0.9rem;
    padding: 10px 20px;
}

.download-btn:hover, .register-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.register-section {
    text-align: center;
}

.register-section p {
    margin-bottom: 25px;
    color: #666;
    font-size: 1.1rem;
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.platform-group {
    text-align: left;
    padding: 25px;
    border: 2px solid #f0f0f0;
    border-radius: 10px;
    background: #fafafa;
}

.platform-group h3 {
    margin-bottom: 20px;
    color: #333;
    text-align: center;
    font-size: 1.3rem;
}

.account-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

footer {
    text-align: center;
    color: white;
    opacity: 0.8;
    padding: 20px 0;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .download-section, .register-section {
        padding: 20px;
    }
    
    .download-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .download-card {
        padding: 20px;
    }
    
    .platform-icon {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.8rem;
    }
    
    .download-btn, .register-btn {
        display: block;
        margin: 10px 0;
    }
    
    .platform-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}