/* Gia Phả Việt Nam - Main Styles */
/* Warm Neutrals & Traditional Brown/Red Theme */

/* Base Styles */
body {
    font-family: 'Noto Sans VN', sans-serif;
    background-color: #f7f5f0;
    color: #44403c;
}

h1, h2, h3, h4, .serif-font {
    font-family: 'Merriweather', serif;
}

/* Tree Diagram Styles */
.tree ul {
    padding-top: 20px;
    position: relative;
    transition: all 0.5s;
    display: flex;
    justify-content: center;
}

.tree li {
    float: left;
    text-align: center;
    list-style-type: none;
    position: relative;
    padding: 20px 5px 0 5px;
    transition: all 0.5s;
}

/* Tree Connectors */
.tree li::before, .tree li::after {
    content: '';
    position: absolute;
    top: 0;
    right: 50%;
    border-top: 1px solid #78350f;
    width: 50%;
    height: 20px;
}

.tree li::after {
    right: auto;
    left: 50%;
    border-left: 1px solid #78350f;
}

.tree li:only-child::after, .tree li:only-child::before {
    display: none;
}

.tree li:only-child {
    padding-top: 0;
}

.tree li:first-child::before, .tree li:last-child::after {
    border: 0 none;
}

.tree li:last-child::before {
    border-right: 1px solid #78350f;
    border-radius: 0 5px 0 0;
}

.tree li:first-child::after {
    border-radius: 5px 0 0 0;
}

.tree ul ul::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    border-left: 1px solid #78350f;
    width: 0;
    height: 20px;
}

/* Tree Node Styling */
.tree-node {
    border: 1px solid #78350f;
    padding: 10px;
    text-decoration: none;
    color: #431407;
    font-family: 'Merriweather', serif;
    font-size: 14px;
    display: inline-block;
    background: #fff;
    border-radius: 5px;
    transition: all 0.5s;
    cursor: pointer;
    box-shadow: 2px 2px 5px rgba(0,0,0,0.05);
}

.tree-node:hover, .tree-node.active {
    background: #fef3c7;
    border-color: #92400e;
    transform: scale(1.05);
    z-index: 10;
}

/* Chart Container */
.chart-container {
    position: relative;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    height: 300px;
    max-height: 400px;
}

/* Tab Transitions */
.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); }
}

/* Wood Pattern Header */
.wood-pattern {
    background-color: #78350f;
    background-image: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(255,255,255,0.05) 10px, rgba(255,255,255,0.05) 20px);
}

/* Collapsible Navigation on Scroll */
nav {
    transition: all 0.3s ease;
}

nav.scrolled {
    padding: 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

nav.scrolled .nav-btn {
    padding: 0.375rem 0.5rem;
    font-size: 0.75rem;
}

nav.scrolled ul {
    padding-top: 0.375rem !important;
    padding-bottom: 0.375rem !important;
    gap: 0.25rem;
}

/* Mobile Responsive - iPhone 15 Pro and similar (max-width: 430px) */
@media (max-width: 430px) {
    nav .nav-btn {
        padding: 0.375rem 0.5rem;
        font-size: 0.7rem;
    }
    
    nav ul {
        gap: 0.25rem;
        padding: 0.5rem 0;
    }
    
    nav.scrolled .nav-btn {
        padding: 0.25rem 0.375rem;
        font-size: 0.65rem;
    }
    
    header .container {
        padding: 1rem 0.5rem;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    header p {
        font-size: 0.875rem;
    }
    
    header .mt-6 {
        margin-top: 0.75rem;
    }
    
    header .mt-6 span {
        padding: 0.25rem 0.5rem;
        font-size: 0.65rem;
    }

    main.container {
        padding: 1rem 0.75rem;
    }

    .tab-content {
        max-width: 100%;
        overflow-wrap: anywhere;
        word-break: break-word;
    }
    
    .tab-content h2 {
        font-size: 1.5rem;
        word-wrap: break-word;
        overflow-wrap: anywhere;
    }
    
    .tab-content h3 {
        font-size: 1rem;
        word-wrap: break-word;
        overflow-wrap: anywhere;
    }
    
    .tab-content p,
    .tab-content li,
    .tab-content div {
        word-wrap: break-word;
        overflow-wrap: anywhere;
        word-break: break-word;
    }

    #tong-quan .max-w-4xl {
        max-width: 100%;
        padding: 0 0.25rem;
    }
    
    #tong-quan .bg-white {
        padding: 1rem;
    }
    
    #tong-quan ul li {
        flex-wrap: wrap;
    }
    
    #tong-quan ul li > div {
        max-width: calc(100% - 2rem);
        word-break: break-word;
        overflow-wrap: anywhere;
    }
    
    #tong-quan ul li strong {
        display: block;
        margin-bottom: 0.25rem;
    }

    #thuc-hanh .grid {
        grid-template-columns: 1fr !important;
    }
    
    #thuc-hanh .bg-\[\#fefce8\] {
        padding: 1rem;
    }
    
    #thuc-hanh h3 {
        font-size: 1rem;
    }
    
    #outputContent {
        font-size: 0.875rem;
        line-height: 1.6;
    }
    
    #thuc-hanh form .grid {
        grid-template-columns: 1fr !important;
    }

    #phong-tuc .grid {
        grid-template-columns: 1fr;
    }
}

/* General Mobile (max-width: 768px) */
@media (max-width: 768px) {
    body {
        overflow-x: hidden;
    }
    
    .tab-content {
        overflow-x: hidden;
    }

    .tree-node {
        font-size: 11px;
        padding: 6px;
    }

    .chart-container {
        max-width: 280px;
        height: 220px;
    }
}