:root {
    /* Color Palette - Earth Tones & Morandi */
    --color-bg-light: #FDFBF7;
    /* Cream */
    --color-bg-dark: #1A1A1A;
    /* Charcoal */

    --color-sage: #8A9A5B;
    --color-sand: #D2B48C;
    --color-slate: #708090;
    --color-bronze: #CD7F32;
    --color-bronze-light: #e6a365;

    --color-text-light: #2c3e50;
    --color-text-dark: #f0f0f0;

    --color-glass-light: rgba(255, 255, 255, 0.7);
    --color-glass-dark: rgba(20, 20, 20, 0.6);

    --shadow-soft: 0 8px 32px 0 rgba(31, 38, 135, 0.15);

    /* Defaults (Light Mode) */
    --bg-main: var(--color-bg-light);
    --text-main: var(--color-text-light);
    --glass-bg: var(--color-glass-light);
    --border-glass: rgba(255, 255, 255, 0.18);
    --accent-color: var(--color-bronze);

    --font-serif: 'Noto Serif TC', serif;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-main: var(--color-bg-dark);
        --text-main: var(--color-text-dark);
        --glass-bg: var(--color-glass-dark);
        --border-glass: rgba(255, 255, 255, 0.1);
    }
}

/* Dynamic Themes */
body[data-theme='dark'] {
    --bg-main: var(--color-bg-dark);
    --text-main: var(--color-text-dark);
    --glass-bg: var(--color-glass-dark);
    --border-glass: rgba(255, 255, 255, 0.1);
    --accent-color: var(--color-sand);
}

body[data-theme='dark']::before {
    background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-sans);
    overflow: hidden;
    /* Infinite canvas needs hidden overflow */
    transition: background-color 0.3s ease, color 0.3s ease;
    width: 100vw;
    height: 100vh;
}

/* Background Texture */
body::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(var(--color-slate) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.1;
    pointer-events: none;
    z-index: -1;
}

/* Canvas Container */
#tree-canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: grab;
}

#tree-canvas:active {
    cursor: grabbing;
}

/* Sidebar Custom Scrollbar */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

/* Sidebar Styling Refinement */
.sidebar-content {
    padding: 30px;
    background: linear-gradient(to bottom, var(--bg-main), #fff);
}

.sidebar-section {
    margin-bottom: 35px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 15px;
}

.gallery-item {
    aspect-ratio: 1;
    background: #f0f0f0;
    border-radius: 12px;
    overflow: hidden;
    cursor: zoom-in;
    transition: transform 0.3s;
}

.gallery-item:hover {
    transform: scale(1.05);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Timeline Styling */
/* Badges */
.badge {
    display: inline-block;
    padding: 3px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-right: 5px;
    letter-spacing: 0.5px;
}

.badge-gender-male {
    background: rgba(31, 117, 255, 0.1);
    color: #1e60d5;
}

.badge-gender-female {
    background: rgba(255, 31, 117, 0.1);
    color: #d51e60;
}

.badge-status-alive {
    background: rgba(138, 154, 91, 0.1);
    color: var(--color-sage);
}

.badge-status-deceased {
    background: rgba(112, 128, 144, 0.1);
    color: var(--color-slate);
}

body[data-theme='dark'] .badge-gender-male {
    background: rgba(31, 117, 255, 0.2);
    color: #5c9eff;
}

body[data-theme='dark'] .badge-gender-female {
    background: rgba(255, 31, 117, 0.2);
    color: #ff5c9e;
}

.timeline {
    position: relative;
    padding-left: 20px;
    margin-top: 15px;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 0;
    top: 5px;
    bottom: 5px;
    width: 2px;
    background: var(--color-bronze);
    opacity: 0.2;
}

.timeline-item {
    position: relative;
    margin-bottom: 25px;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -24.5px;
    top: 6px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-bronze);
    border: 2px solid var(--bg-main);
    z-index: 1;
}

.timeline-year {
    font-weight: 700;
    font-size: 0.8rem;
    color: var(--color-bronze);
    letter-spacing: 1px;
    margin-bottom: 4px;
    text-transform: uppercase;
}

.timeline-content {
    font-size: 0.95rem;
    color: var(--text-main);
    line-height: 1.5;
    opacity: 0.9;
}

/* Rich Text & Notes */
.rich-text-content {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-main);
    opacity: 0.85;
}

.rich-text-content p {
    margin-bottom: 15px;
}


.floating-dock {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    padding: 12px 24px;
    border-radius: 50px;
    box-shadow: var(--shadow-soft);
    display: flex;
    gap: 20px;
    z-index: 100;
}

.dock-btn {
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
}

/* Quick Relation Buttons */
.quick-relation-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.btn-quick-rel {
    background: rgba(205, 127, 50, 0.1);
    border: 1px solid var(--color-bronze);
    color: var(--color-bronze);
    padding: 10px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-quick-rel:hover {
    background: var(--color-bronze);
    color: white;
}

.btn-quick-rel:nth-child(3) {
    grid-column: span 2;
}

/* Sidebar (Right) */
.sidebar {
    position: fixed;
    top: 0;
    right: -400px;
    /* Hidden default */
    width: 400px;
    height: 100%;
    background: var(--bg-main);
    border-left: 1px solid var(--border-glass);
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.1);
    transition: right 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    z-index: 200;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.sidebar.active {
    right: 0;
}

.sidebar-header {
    height: 250px;
    position: relative;
    background-color: var(--color-slate);
    overflow: hidden;
}

.cover-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.8;
}

.profile-info {
    position: absolute;
    bottom: 20px;
    left: 20px;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.profile-info h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    margin-bottom: 5px;
}

.profile-info p {
    font-size: 0.9rem;
    opacity: 0.9;
}

.sidebar-content {
    padding: 25px;
}

.close-sidebar {
    position: absolute;
    top: 15px;
    left: 15px;
    background: rgba(0, 0, 0, 0.3);
    border: none;
    color: white;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: background 0.2s;
}

.close-sidebar:hover {
    background: rgba(0, 0, 0, 0.6);
}

/* Form Styles */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--color-slate);
    font-weight: 600;
}

.form-control {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    font-family: var(--font-sans);
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-bronze);
}

/* Typography Helpers */
.section-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    margin-top: 30px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--accent-color);
}

/* Splash Screen Styles */
#splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-main);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.8s ease, visibility 0.8s;
}

.splash-content {
    text-align: center;
    max-width: 400px;
    width: 90%;
}

.splash-logo {
    font-family: var(--font-serif);
    font-size: 3rem;
    background: linear-gradient(135deg, var(--color-bronze), var(--color-sage));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 15px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s forwards 0.2s;
}

.splash-subtitle {
    font-size: 1.1rem;
    color: var(--color-slate);
    letter-spacing: 2px;
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s forwards 0.4s;
}

.loading-bar-container {
    width: 100%;
    height: 4px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 20px;
}

#loading-bar {
    width: 0%;
    height: 100%;
    background: var(--color-bronze);
    transition: width 2s cubic-bezier(0.1, 0, 0.3, 1);
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#splash-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        right: -100%;
    }

    .floating-dock {
        bottom: 20px;
        padding: 10px 15px;
        gap: 12px;
        width: 90%;
        justify-content: space-around;
        border-radius: 20px;
    }

    .dock-btn {
        width: 42px;
        height: 42px;
        font-size: 1.3rem;
    }

    .modal-content {
        width: 95%;
        padding: 20px;
        margin: 10px;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .sidebar-header {
        height: 200px;
    }

    .profile-info h2 {
        font-size: 1.5rem;
    }
}

/* Prevent canvas from jittering on touch */
#tree-canvas {
    touch-action: none;
    display: block;
}