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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #1e293b;
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
}

h1 {
    font-size: 2.5rem;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
    font-weight: 800;
}

.subtitle {
    color: #64748b;
    font-size: 1.1rem;
}

.main-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    min-height: 600px;
}

.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 10px;
}

.tab {
    padding: 12px 24px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    color: #64748b;
    transition: all 0.3s;
}

.tab:hover {
    background: #f8fafc;
    color: #6366f1;
    transform: translateY(-2px);
}

.tab.active {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.platform-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
    padding: 20px;
    background: linear-gradient(135deg, #f8fafc, white);
    border-radius: 12px;
    border-left: 5px solid #6366f1;
}

.platform-icon {
    width: 50px;
    height: 50px;
    background: #6366f1;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
}

.method-card {
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 20px;
    transition: all 0.3s;
}

.method-card:hover {
    border-color: #6366f1;
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.15);
    transform: translateY(-2px);
}

.method-title {
    font-size: 1.3rem;
    color: #1e293b;
    margin-bottom: 10px;
    font-weight: 700;
}

.method-badge {
    display: inline-block;
    padding: 6px 12px;
    background: #10b981;
    color: white;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.method-badge.advanced {
    background: #f59e0b;
}

.step {
    margin: 15px 0;
    padding-left: 30px;
    position: relative;
}

.step::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: #6366f1;
    font-size: 12px;
}

.step-number {
    display: inline-block;
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 30px;
    font-weight: 700;
    margin-right: 10px;
}

.code-block {
    background: #0f172a;
    color: #e2e8f0;
    padding: 20px;
    border-radius: 8px;
    margin: 15px 0;
    overflow-x: auto;
}

pre {
    margin: 0;
    white-space: pre-wrap;
    word-wrap: break-word;
}

code {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin: 15px 0;
    border-left: 5px solid;
}

.alert-info {
    background: #dbeafe;
    border-color: #3b82f6;
    color: #1e40af;
}

.alert-warning {
    background: #fef3c7;
    border-color: #f59e0b;
    color: #92400e;
}

.alert-success {
    background: #d1fae5;
    border-color: #10b981;
    color: #065f46;
}

.checklist {
    background: #f8fafc;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.checklist-item {
    padding: 10px;
    margin: 8px 0;
    background: white;
    border-radius: 6px;
    display: flex;
    align-items: center;
}

.checklist-item input {
    width: 20px;
    height: 20px;
    margin-right: 12px;
    cursor: pointer;
}

.quick-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin: 20px 0;
}

.quick-link {
    padding: 15px;
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    text-align: center;
    color: #1e293b;
    font-weight: 600;
    transition: all 0.3s;
    cursor: pointer;
}

.quick-link:hover {
    border-color: #6366f1;
    background: #f8fafc;
    transform: translateY(-2px);
}

.pro-tip {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border-left: 5px solid #f59e0b;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.visual-path {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0;
    padding: 20px;
    background: #f8fafc;
    border-radius: 8px;
}

.path-item {
    padding: 10px 20px;
    background: white;
    border: 2px solid #6366f1;
    border-radius: 6px;
    font-weight: 600;
    color: #6366f1;
    display: inline-block;
}

.path-arrow {
    color: #6366f1;
    font-size: 20px;
    font-weight: 700;
    display: inline-block;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: white;
    border-radius: 8px;
    overflow: hidden;
}

.comparison-table th {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

.comparison-table td {
    padding: 12px 15px;
    border-bottom: 1px solid #e2e8f0;
}

footer {
    text-align: center;
    padding: 30px;
    color: white;
    margin-top: 30px;
}

@media (max-width: 768px) {
    h1 {
        font-size: 1.8rem;
    }
    .tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
    }
}