:root {
    /*--primary-color: #2c3e50;*/
    /*--secondary-color: #3498db;*/
    --accent-color: #f39c12;
    --success-color: #27ae60;
    --light-bg: #f8f9fa;
}

.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, #4a6491 100%);
    color: white;
    padding: 10px 0;
    margin-bottom: 10px;
    border-radius: 0 0 20px 20px;
}

.section-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    padding: 30px;
    margin-bottom: 30px;
    border: none;
    transition: transform 0.3s ease;
}

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

.concept-card {
    height: 100%;
    border-left: 4px solid var(--secondary-color);
}

.workflow-card {
    border-left: 4px solid var(--accent-color);
}

.command-card {
    border-left: 4px solid var(--success-color);
}

.code-block {
    background-color: #2c3e50;
    color: #ecf0f1;
    border-radius: 8px;
    padding: 15px;
    font-family: 'Courier New', monospace;
    overflow-x: auto;
    margin: 15px 0;
    position: relative;
}

.code-block::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 30px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px 8px 0 0;
}

.workflow-visual {
    background: var(--light-bg);
    border-radius: 10px;
    padding: 30px;
    margin: 30px 0;
}

.workflow-step {
    text-align: center;
    padding: 15px;
}

.workflow-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    font-size: 1.8rem;
    color: white;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.step-1 .workflow-icon {
    background-color: #e74c3c;
}

.step-2 .workflow-icon {
    background-color: #f39c12;
}

.step-3 .workflow-icon {
    background-color: #27ae60;
}

.file-status-card {
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    color: white;
}

.status-untracked {
    background-color: #e74c3c;
}

.status-modified {
    background-color: #f39c12;
}

.status-staged {
    background-color: #3498db;
}

.status-committed {
    background-color: #27ae60;
}

.diagram-container {
    background: white;
    border-radius: 10px;
    padding: 30px;
    margin: 30px 0;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}

.zone-box {
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    color: white;
    font-weight: bold;
}

.working-directory {
    background-color: #e74c3c;
}

.staging-area {
    background-color: #f39c12;
}

.git-repository {
    background-color: #27ae60;
}

.arrow {
    text-align: center;
    font-size: 2rem;
    color: #7f8c8d;
    margin: 10px 0;
}

.command-example {
    background-color: #34495e;
    color: #f39c12;
    padding: 8px 12px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    display: inline-block;
    margin: 5px 0;
}

.comparison-table th {
    background-color: var(--primary-color);
    color: white;
}

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

.btn-primary:hover {
    background-color: #2980b9;
    border-color: #2980b9;
}

.note {
    background-color: #e8f4fd;
    border-left: 4px solid var(--secondary-color);
    padding: 15px;
    margin: 15px 0;
    border-radius: 0 8px 8px 0;
}

@media (max-width: 768px) {
    .hero-section {
        padding: 50px 0;
    }

    .workflow-step {
        margin-bottom: 20px;
    }
}