/* CSS Variables for theming */
:root {
    --primary-gradient: linear-gradient(135deg, #A8895C 0%, #8B7355 100%);
    --primary-color: #A8895C;
    --primary-dark: #8B7355;
    --secondary-color: #7A6348;
    
    --bg-main: #ffffff;
    --bg-secondary: #FAF8F3;
    --bg-sidebar: #F5F1E8;
    --bg-header: linear-gradient(135deg, #A8895C 0%, #8B7355 100%);
    
    --text-primary: #3E2F24;
    --text-secondary: #5D4A3A;
    --text-muted: #8B7355;
    
    --border-color: #E5DBC8;
    --border-hover: #D4C4AB;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode variables */
body.dark-mode {
    --bg-main: #1a202c;
    --bg-secondary: #2d3748;
    --bg-sidebar: #2d3748;
    --bg-header: linear-gradient(135deg, #8B7355 0%, #7A6348 100%);
    
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-muted: #a0aec0;
    
    --border-color: #4a5568;
    --border-hover: #718096;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    box-sizing: border-box;
    background: var(--bg-main);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

*, *::before, *::after {
    box-sizing: inherit;
}

body.resizing {
    cursor: col-resize;
    user-select: none;
}

#app {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Mobile menu toggle button - hidden on desktop */
.mobile-menu-toggle {
    display: none;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    font-size: 24px;
    width: 40px;
    height: 40px;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    align-items: center;
    justify-content: center;
    padding: 0;
    line-height: 1;
}

.mobile-menu-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
}

/* =========================
   Sidebar Styles
   ========================= */

#sidebar {
    width: 420px;
    min-width: 280px;
    max-width: 650px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.sidebar-header {
    padding: 0;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-header);
    color: white;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
}

.header-top h1 {
    font-size: 24px;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-controls {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* Back to TNG Button */
.back-to-tng-btn {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.back-to-tng-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateX(-2px);
}

.back-to-tng-btn:active {
    transform: translateX(-1px);
}


/* Date format toggle */
.date-format-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    padding: 8px 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 11px;
    font-weight: 600;
    color: white;
    font-family: 'Inter', sans-serif;
}

.date-format-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

/* Dark mode toggle */
#darkModeToggle {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 20px;
}

#darkModeToggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

#darkModeToggle .icon-moon {
    display: none;
}

body.dark-mode #darkModeToggle .icon-sun {
    display: none;
}

body.dark-mode #darkModeToggle .icon-moon {
    display: block;
}

/* Stats Panel */
.stats-panel {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 0.9;
    font-weight: 500;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    line-height: 1;
}

/* Search container */
.search-container {
    position: relative;
    padding: 16px 20px;
    background: var(--bg-sidebar);
}

.search-icon {
    position: absolute;
    left: 32px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 16px;
    opacity: 0.5;
    pointer-events: none;
}

#searchInput {
    width: 100%;
    padding: 12px 40px 12px 40px;
    border-radius: 12px;
    border: 2px solid var(--border-color);
    font-size: 14px;
    background: var(--bg-main);
    color: var(--text-primary);
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
}

#searchInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

#clearSearch {
    position: absolute;
    right: 28px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px 8px;
    line-height: 1;
    border-radius: 4px;
    transition: var(--transition);
}

#clearSearch:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.sidebar-header-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 12px 20px 16px;
    background: var(--bg-sidebar);
}

.sidebar-header-buttons button {
    padding: 10px 16px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 10px;
    border: 2px solid var(--border-color);
    background: var(--bg-main);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.sidebar-header-buttons button:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.sidebar-header-buttons button span {
    font-size: 10px;
}

#surnameList {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

#surnameList::-webkit-scrollbar {
    width: 8px;
}

#surnameList::-webkit-scrollbar-track {
    background: transparent;
}

#surnameList::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

#surnameList::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

/* Surname groups */
.surname-group {
    margin-bottom: 4px;
    border-radius: 8px;
    overflow: hidden;
    transition: var(--transition);
}

.surname-header {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 12px 20px;
    font-size: 15px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
}

.surname-header:hover {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.1) 0%, transparent 100%);
    transform: translateX(4px);
}

.surname-group.open .surname-header {
    background: var(--primary-gradient);
    color: white;
}

.surname-header-title {
    font-weight: 600;
    letter-spacing: -0.3px;
}

.surname-header-count {
    font-size: 12px;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.2);
    padding: 3px 10px;
    border-radius: 12px;
}

.person-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: none;
    background: var(--bg-secondary);
}

.surname-group.open .person-list {
    display: block;
    animation: slideDown 0.3s ease;
}

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

.person-item {
    padding: 10px 20px 10px 36px;
    font-size: 13px;
    cursor: pointer;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 6px;
    transition: var(--transition);
    color: var(--text-secondary);
    border-left: 3px solid transparent;
}

.person-item:hover {
    background: rgba(102, 126, 234, 0.1);
    border-left-color: var(--primary-color);
    transform: translateX(4px);
}

.person-item.active {
    background: rgba(102, 126, 234, 0.2);
    border-left-color: var(--primary-color);
    font-weight: 600;
    color: var(--text-primary);
}

.person-maiden {
    text-transform: uppercase;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
}

.person-life {
    font-style: italic;
    font-size: 12px;
    color: var(--text-muted);
}

/* =========================
   Resizer
   ========================= */

#sidebarResizer {
    width: 5px;
    cursor: col-resize;
    background: var(--border-color);
    transition: var(--transition);
}

#sidebarResizer:hover {
    background: var(--primary-color);
}

/* =========================
   Main Tree Area
   ========================= */

#main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-main);
}

#toolbar {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    gap: 20px;
    box-shadow: var(--shadow-sm);
}

.toolbar-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.toolbar-icon {
    font-size: 20px;
}

.toolbar-label {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-secondary);
}

#zoomSlider {
    width: 180px;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
    cursor: pointer;
}

/* Track styling */
#zoomSlider::-webkit-slider-runnable-track {
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
}

#zoomSlider::-moz-range-track {
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
}

#zoomSlider::-moz-range-progress {
    height: 6px;
    border-radius: 3px;
    background: var(--primary-color);
}

#zoomSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    margin-top: -6px;
    border-radius: 50%;
    background: var(--primary-gradient);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

#zoomSlider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: var(--shadow-md);
}

#zoomSlider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-gradient);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

#zoomSlider::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: var(--shadow-md);
}

#zoomValue {
    min-width: 50px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
}

#zoomReset,
#fitToHeight {
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 8px;
    border: 2px solid var(--border-color);
    background: var(--bg-main);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
}

#zoomReset:hover,
#fitToHeight:hover {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

#treeContainer {
    flex: 1;
    overflow: hidden;
    position: relative;
    background: var(--bg-secondary);
}

#treeFrame {
    border: none;
    width: 100%;
    height: 100%;
}

/* =========================
   Loading Overlay
   ========================= */

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-main);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-overlay p {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* =========================
   Modal
   ========================= */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--bg-main);
    border-radius: 16px;
    padding: 32px;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    position: relative;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--bg-secondary);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    color: var(--text-muted);
}

.modal-close:hover {
    background: var(--primary-color);
    color: white;
    transform: rotate(90deg);
}

/* =========================
   Responsive Design
   ========================= */

@media (max-width: 1024px) {
    #sidebar {
        width: 320px;
        min-width: 260px;
    }
}

@media (max-width: 768px) {
    /* Show hamburger menu */
    .mobile-menu-toggle {
        display: flex;
    }
    
    /* Sidebar becomes overlay */
    #sidebar {
        position: fixed;
        top: 0;
        left: -100%;
        width: 85%;
        max-width: 350px;
        height: 100vh;
        z-index: 1000;
        transition: left 0.3s ease;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
    }
    
    #sidebar.mobile-open {
        left: 0;
    }
    
    /* Show overlay when sidebar open */
    body.sidebar-open .sidebar-overlay {
        display: block;
    }
    
    /* Hide resizer on mobile */
    #sidebarResizer {
        display: none;
    }
    
    /* Full width main area */
    #main {
        width: 100%;
    }
    
    /* Simplify toolbar */
    #toolbar {
        height: auto;
        flex-wrap: wrap;
        padding: 10px 12px;
        gap: 10px;
    }
    
    .toolbar-section {
        width: 100%;
        justify-content: space-between;
    }
    
    #zoomSlider {
        flex: 1;
        margin: 0 10px;
    }
    
    .header-top h1 {
        font-size: 18px;
        flex: 1;
        text-align: center;
    }
    
    .modal-content {
        margin: 20px;
        max-width: calc(100% - 40px);
    }
    
    /* Touch-friendly buttons */
    .sidebar-header-buttons button {
        padding: 12px 16px;
        font-size: 14px;
    }
    
    .person-item {
        padding: 12px 20px 12px 36px;
        font-size: 14px;
    }
    
    .surname-header {
        padding: 14px 20px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    #sidebar {
        width: 90%;
        max-width: 300px;
    }
    
    .header-top h1 {
        font-size: 16px;
    }
    
    .back-to-tng-btn {
        font-size: 12px;
        padding: 6px 10px;
    }
    
    #zoomReset,
    #fitToHeight {
        padding: 8px 12px;
        font-size: 12px;
    }
    
    .toolbar-label {
        display: none;
    }
    
    .toolbar-icon {
        font-size: 18px;
    }
}