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

:root {
    --primary-color: #3182ce;
    --secondary-color: #ed8936;
    --common-color: #38b2ac;
    --dark-bg: #2d3748;
    --light-bg: #f8f9fa;
    --card-bg: white;
    --border-color: #edf2f7;
    --text-color: #333;
    --heading-color: #2d3748;
    --subheading-color: #4a5568;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-bg);
    padding: 0;
    margin: 0;
}

header {
    background-color: var(--dark-bg);
    color: white;
    text-align: center;
    padding: 2.5rem 1rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(49, 130, 206, 0.2) 0%, rgba(237, 137, 54, 0.2) 100%);
    z-index: 1;
}

header h1, header p {
    position: relative;
    z-index: 2;
}

header h1 {
    margin-bottom: 0.5rem;
    font-size: 2.5rem;
    letter-spacing: 0.05em;
}

header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: 2.5rem;
    margin-bottom: 2.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

section:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
}

h2 {
    color: var(--heading-color);
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.8rem;
    font-size: 1.8rem;
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background-color: var(--primary-color);
}

h3 {
    color: var(--subheading-color);
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

ul {
    list-style-type: none;
}

li {
    padding: 0.75rem 0.5rem;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.2s ease;
    cursor: pointer;
}

li:last-child {
    border-bottom: none;
}

footer {
    text-align: center;
    padding: 2.5rem;
    background-color: var(--dark-bg);
    color: white;
    margin-top: 3rem;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
}

/* Branch Stats */
.branch-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.stat-card {
    flex: 1;
    min-width: 200px;
    background-color: var(--border-color);
    padding: 1.8rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.stat-card:nth-child(1)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--primary-color);
}

.stat-card:nth-child(2)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--secondary-color);
}

.stat-card:nth-child(3)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--common-color);
}

.stat-card h3 {
    margin-bottom: 0.5rem;
}

.stat-card p {
    font-size: 1.1rem;
}

.stat-card span {
    font-size: 1.8rem;
    font-weight: bold;
    display: block;
    margin-top: 0.5rem;
    color: var(--heading-color);
}

/* Branch Lists */
.branch-list {
    display: flex;
    flex-wrap: wrap;
    gap: 2.5rem;
}

.branch-column {
    flex: 1;
    min-width: 250px;
}

.branch-column h3 {
    margin-bottom: 1rem;
    padding-left: 0.5rem;
    border-left: 4px solid;
}

.branch-column:nth-child(1) h3 {
    border-color: var(--primary-color);
}

.branch-column:nth-child(2) h3 {
    border-color: var(--secondary-color);
}

.branch-column ul {
    background-color: #f7fafc;
    border-radius: 8px;
    padding: 1rem;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

/* Visualization */
.visualization {
    padding: 3rem 2rem;
}

#venn-diagram {
    height: 450px;
    margin: 0 auto;
    transition: all 0.3s ease;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .branch-stats {
        flex-direction: column;
    }
    
    .branch-list {
        flex-direction: column;
    }
    
    .stat-card, .branch-column {
        width: 100%;
    }
    
    section {
        padding: 1.5rem;
    }
}

/* Branch Item Styling */
li {
    display: flex;
    align-items: center;
    padding: 0.75rem 0.8rem;
    transition: all 0.2s ease;
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

li.hover, li:hover {
    background-color: #edf2f7;
    transform: translateX(5px);
}

li.highlight {
    background-color: rgba(49, 130, 206, 0.2);
    transform: translateX(5px);
}

li.related {
    background-color: rgba(56, 178, 172, 0.2);
    transform: translateX(5px);
}

li::before {
    content: '→';
    margin-right: 0.5rem;
    color: #718096;
}

/* Common Branch Highlight */
#common-branches li {
    background-color: rgba(56, 178, 172, 0.1);
    border-left: 4px solid var(--common-color);
    padding-left: 1rem;
    margin-bottom: 0.5rem;
    border-radius: 4px;
}

#common-branches li::before {
    content: '✓';
    color: var(--common-color);
}

/* Main Only Branch Styling */
#main-only li {
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
    margin-bottom: 0.5rem;
    border-radius: 4px;
    background-color: rgba(49, 130, 206, 0.05);
}

#main-only li::before {
    color: var(--primary-color);
}

/* Release Only Branch Styling */
#release-only li {
    border-left: 4px solid var(--secondary-color);
    padding-left: 1rem;
    margin-bottom: 0.5rem;
    border-radius: 4px;
    background-color: rgba(237, 137, 54, 0.05);
}

#release-only li::before {
    color: var(--secondary-color);
}

/* Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-section {
    opacity: 0;
    animation: fadeIn 0.5s ease-out forwards;
}

.animate-item {
    opacity: 0;
    animation: fadeIn 0.3s ease-out forwards;
}

/* Filter and Search */
.filter-container {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: #f7fafc;
    border-radius: 8px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.search-box {
    display: flex;
    margin-bottom: 1rem;
}

.search-box input {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid #e2e8f0;
    border-radius: 4px 0 0 4px;
    font-size: 1rem;
}

.search-box button {
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    transition: background-color 0.2s;
}

.search-box button:hover {
    background-color: #2b6cb0;
}

.filter-options {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.filter-options label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.filter-options input[type="checkbox"] {
    width: 16px;
    height: 16px;
}

/* Tooltip */
.tooltip {
    position: fixed;
    background-color: white;
    border-radius: 4px;
    padding: 0.75rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    max-width: 300px;
    pointer-events: none;
}

.tooltip-title {
    font-weight: bold;
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.tooltip-content {
    font-size: 0.9rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1001;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: white;
    border-radius: 8px;
    padding: 2rem;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.close-button {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: #718096;
    transition: color 0.2s;
}

.close-button:hover {
    color: #2d3748;
}

#modal-title {
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.branch-type {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: #edf2f7;
    border-radius: 4px;
    margin-bottom: 1rem;
    font-weight: bold;
}

.branch-details-section {
    margin-bottom: 1.5rem;
}

.branch-details-section h3 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.branch-details-section ul {
    background-color: #f7fafc;
    border-radius: 4px;
    padding: 0.75rem;
}

.branch-details-section li {
    padding: 0.5rem;
    border-bottom: 1px solid #e2e8f0;
}

.branch-details-section li:last-child {
    border-bottom: none;
}

.branch-details-section li::before {
    content: none;
}