/*
 * style.css
 * 
 * Premium design system and layout styling for Tamil Family Tree.
 * Follows an elegant dark/light theme, modern glassmorphism, 
 * smooth transitions, and traditional gold/emerald accents.
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Mukta+Malar:wght@400;500;600;700&family=Outfit:wght@400;500;600;700&display=swap');

:root {
    /* Color Tokens - Dark Mode Default */
    --bg-main: #0b0f19;
    --bg-sidebar: rgba(15, 23, 42, 0.75);
    --bg-card: rgba(30, 41, 59, 0.7);
    --bg-node: rgba(15, 23, 42, 0.85);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Brand Accents */
    --accent-gold: #d4af37;
    --accent-gold-glow: rgba(212, 175, 55, 0.25);
    --accent-emerald: #10b981;
    --accent-emerald-glow: rgba(16, 185, 129, 0.25);
    
    /* Genders */
    --gender-male: #38bdf8;
    --gender-male-bg: rgba(56, 189, 248, 0.1);
    --gender-female: #f472b6;
    --gender-female-bg: rgba(244, 114, 182, 0.1);
    
    /* Fonts */
    --font-heading: 'Outfit', 'Mukta Malar', sans-serif;
    --font-body: 'Inter', 'Mukta Malar', sans-serif;
    
    /* Shadows & Borders */
    --shadow-premium: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 15px rgba(212, 175, 55, 0.15);
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    
    /* Animations */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}




/* Forest Design Template Overrides */
[data-template="forest"] {
    --bg-main: #061f14;
    --bg-sidebar: rgba(11, 46, 30, 0.85);
    --bg-card: rgba(16, 68, 44, 0.7);
    --bg-node: rgba(11, 46, 30, 0.9);
    --border-color: rgba(16, 185, 129, 0.15);
    --text-primary: #ecfdf5;
    --text-secondary: #a7f3d0;
    --text-muted: #34d399;
    
    --accent-gold: #10b981;
    --accent-gold-glow: rgba(16, 185, 129, 0.25);
    --accent-emerald: #34d399;
    --accent-emerald-glow: rgba(52, 211, 153, 0.25);
    
    --gender-male: #38bdf8;
    --gender-male-bg: rgba(56, 189, 248, 0.1);
    --gender-female: #f472b6;
    --gender-female-bg: rgba(244, 114, 182, 0.1);
}

/* Royal Crimson & Gold Template Overrides */
[data-template="royal"] {
    --bg-main: #180507;
    --bg-sidebar: rgba(38, 10, 14, 0.85);
    --bg-card: rgba(54, 15, 20, 0.7);
    --bg-node: rgba(38, 10, 14, 0.9);
    --border-color: rgba(239, 68, 68, 0.18);
    --text-primary: #fff5f5;
    --text-secondary: #fecaca;
    --text-muted: #ef4444;
    
    --accent-gold: #fbbf24;
    --accent-gold-glow: rgba(251, 191, 36, 0.25);
    --accent-emerald: #f87171;
    --accent-emerald-glow: rgba(248, 113, 113, 0.25);
}

/* Classical Amber & Sandalwood Template Overrides */
[data-template="heritage"] {
    --bg-main: #1b1007;
    --bg-sidebar: rgba(43, 26, 12, 0.85);
    --bg-card: rgba(61, 37, 18, 0.7);
    --bg-node: rgba(43, 26, 12, 0.9);
    --border-color: rgba(245, 158, 11, 0.18);
    --text-primary: #fffbeb;
    --text-secondary: #fde68a;
    --text-muted: #f59e0b;
    
    --accent-gold: #f59e0b;
    --accent-gold-glow: rgba(245, 158, 11, 0.25);
    --accent-emerald: #fbbf24;
    --accent-emerald-glow: rgba(251, 191, 36, 0.25);
}

/* Slate & White Monochrome Template Overrides */
[data-template="mono"] {
    --bg-main: #090d16;
    --bg-sidebar: rgba(18, 25, 41, 0.85);
    --bg-card: rgba(30, 41, 59, 0.7);
    --bg-node: rgba(18, 25, 41, 0.9);
    --border-color: rgba(255, 255, 255, 0.12);
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --accent-gold: #ffffff;
    --accent-gold-glow: rgba(255, 255, 255, 0.2);
    --accent-emerald: #e2e8f0;
    --accent-emerald-glow: rgba(226, 232, 240, 0.2);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scrollbar-width: thin;
    scrollbar-color: var(--text-muted) transparent;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-body);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

/* Scrollbar Styles */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 3px;
}

/* Glassmorphism Class */
.glass-panel {
    background: var(--bg-sidebar);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-premium);
}

/* App Layout */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
}

/* Navigation / Header */
header.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 3rem;
    height: 75px;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--accent-gold);
    text-shadow: var(--shadow-glow);
    animation: pulse 3s infinite ease-in-out;
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Main Workspace */
.main-workspace {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* Sidebar (Left Control Panel) */
.sidebar {
    width: 420px;
    height: 100%;
    z-index: 10;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    transition: transform var(--transition-smooth);
}

.sidebar-tab-header {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 1rem;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: color var(--transition-fast), border-color var(--transition-fast);
    border-bottom: 2px solid transparent;
}

.tab-btn.active {
    color: var(--accent-gold);
    border-bottom-color: var(--accent-gold);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sidebar-section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.sidebar-section h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Interactive Canvas (Right Tree View) */
.canvas-container {
    flex: 1;
    height: 100%;
    position: relative;
    overflow: hidden;
    background-image: radial-gradient(var(--border-color) 1px, transparent 1px);
    background-size: 24px 24px;
}

.canvas-controls {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    z-index: 10;
}

.control-btn {
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-sm);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.control-btn:hover {
    color: var(--accent-gold);
    border-color: var(--accent-gold);
    background: var(--bg-card);
}

/* Elegant Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-gold) 0%, #b39025 100%);
    color: #0b0f19;
    box-shadow: 0 4px 12px var(--accent-gold-glow);
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px var(--accent-gold-glow);
}

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

.active-tree-bg {
    background: linear-gradient(135deg, var(--accent-emerald) 0%, #0891b2 100%) !important;
    color: #0b0f19 !important;
    box-shadow: 0 4px 12px var(--accent-emerald-glow) !important;
    border-color: transparent !important;
}
.btn-secondary:hover {
    background: var(--bg-card);
    border-color: var(--text-secondary);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}
.btn-danger:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: #ef4444;
}

.btn-google {
    background: #ffffff;
    color: #1f2937;
    border: 1px solid #e5e7eb;
}
.btn-google:hover {
    background: #f3f4f6;
}

.btn-google.signed-in {
    background: var(--gender-male-bg);
    border-color: var(--gender-male);
    color: var(--gender-male);
}

/* Forms & Inputs */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.input-field {
    width: 100%;
    padding: 0.65rem 0.85rem;
    border-radius: var(--border-radius-sm);
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    outline: none;
    transition: all var(--transition-fast);
}
[data-theme="light"] .input-field {
    background: rgba(255, 255, 255, 0.9);
}

.input-field:focus {
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 2px var(--accent-gold-glow);
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

/* Photo Upload Frame */
.photo-upload-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.photo-preview {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px dashed var(--accent-gold);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    cursor: pointer;
    position: relative;
    box-shadow: var(--shadow-premium);
    transition: all 0.3s ease;
}
.photo-preview:hover {
    border-color: var(--accent-gold-glow);
    transform: scale(1.05);
}

.photo-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.photo-preview i {
    font-size: 1.25rem;
    color: var(--text-muted);
}

/* Member List Card */
.member-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.member-list-item:hover {
    border-color: var(--text-secondary);
}

.member-list-item.selected {
    border-color: var(--accent-gold);
    box-shadow: var(--shadow-glow);
}

.member-avatar-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.small-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.85rem;
    font-weight: 600;
}

.small-avatar.male {
    border: 1.5px solid var(--gender-male);
    color: var(--gender-male);
}

.small-avatar.female {
    border: 1.5px solid var(--gender-female);
    color: var(--gender-female);
}

/* Detail Card & Relationship Results */
.detail-card {
    background: var(--bg-card);
    border: 1.5px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.detail-header {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.detail-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.25rem;
    font-weight: 700;
}
.detail-avatar.male { border: 2px solid var(--gender-male); color: var(--gender-male); }
.detail-avatar.female { border: 2px solid var(--gender-female); color: var(--gender-female); }

.detail-title h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
}

.detail-title p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    font-size: 0.85rem;
    padding: 0.5rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.detail-item-title {
    color: var(--text-muted);
}
.detail-item-val {
    color: var(--text-primary);
    font-weight: 500;
}

.relation-path-panel {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.relation-results-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 250px;
    overflow-y: auto;
    padding-right: 0.25rem;
}

.relation-result-item {
    padding: 0.65rem 0.85rem;
    border-radius: var(--border-radius-sm);
    background: rgba(15, 23, 42, 0.3);
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}
[data-theme="light"] .relation-result-item {
    background: rgba(255, 255, 255, 0.5);
}

.relation-result-item .rel-name {
    font-weight: 600;
    color: var(--text-primary);
}

.relation-result-item .rel-tag {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--accent-gold);
    font-size: 0.8rem;
    text-align: right;
    display: flex;
    flex-direction: column;
}

.relation-result-item .rel-tag .eng-tag {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-smooth);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-container {
    width: 90%;
    max-width: 500px;
    border-radius: var(--border-radius-md);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transform: translateY(20px);
    transition: transform var(--transition-smooth);
}

.modal-overlay.active .modal-container {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--accent-gold);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--text-primary);
}

/* Tree Styling (SVG-based) */
svg.tree-svg {
    width: 100%;
    height: 100%;
    cursor: grab;
}

svg.tree-svg:active {
    cursor: grabbing;
}

/* SVG Node styles */
.svg-node {
    cursor: pointer;
    transition: transform var(--transition-smooth);
}

.svg-node-bg {
    fill: var(--bg-node);
    stroke: var(--border-color);
    stroke-width: 1.5;
    rx: 12px;
    ry: 12px;
    filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.3));
    transition: stroke var(--transition-fast), fill var(--transition-fast);
}

.svg-node.selected .svg-node-bg {
    stroke: var(--accent-gold);
    stroke-width: 2.5;
    filter: drop-shadow(0 0 10px var(--accent-gold-glow));
}

.svg-node.male .svg-node-bg {
    stroke-color: var(--gender-male);
}

.svg-node.female .svg-node-bg {
    stroke-color: var(--gender-female);
}

.svg-node-name {
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 700;
    fill: var(--text-primary);
}

.svg-node-meta {
    font-family: var(--font-body);
    font-size: 10px;
    fill: var(--text-secondary);
}

.svg-link {
    fill: none;
    stroke: var(--border-color);
    stroke-width: 2;
    transition: stroke var(--transition-fast);
}

.svg-link.marriage-link {
    stroke: var(--accent-gold);
    stroke-width: 2.5;
}

.svg-link.child-link {
    stroke-dasharray: 4, 4;
}

/* Subtle animations */
@keyframes pulse {
    0%, 100% {
        opacity: 0.9;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
}

/* Responsive sidebar toggle */
.sidebar-toggle {
    display: none;
    position: absolute;
    top: 1rem;
    left: 1rem;
    width: 44px;
    height: 44px;
    z-index: 100;
    border-radius: var(--border-radius-sm);
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

@media (max-width: 768px) {
    .sidebar {
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        transform: translateX(-100%);
    }
    .sidebar.active {
        transform: translateX(0);
    }
    .sidebar-toggle {
        display: flex;
    }
}

/* Print directory styling */
#print-directory {
    display: none;
}

@media print {
    #print-directory {
        display: block !important;
        page-break-before: always;
        color: #000000 !important;
        background: #ffffff !important;
        padding: 3rem 2rem !important;
        font-family: sans-serif;
    }
    #print-directory h2 {
        color: #c59b27;
        border-bottom: 2px solid #c59b27;
        padding-bottom: 0.5rem;
        font-size: 1.6rem;
    }
    #print-directory table {
        width: 100%;
        border-collapse: collapse;
        margin-top: 1.5rem;
    }
    #print-directory th, #print-directory td {
        border: 1px solid #cbd5e1;
        padding: 10px 12px;
        text-align: left;
        font-size: 0.95rem;
    }
    #print-directory th {
        background-color: #f1f5f9;
        font-weight: bold;
    }
}

/* Kural Footer Styling */
.kural-footer {
    padding: 1.75rem 2rem 2.5rem 2rem;
    margin-top: 3.5rem;
    margin-bottom: 2rem;
    height: auto;
    min-height: 100px;
    display: flex;
    align-items: center;
    border-top: 1.5px solid var(--border-color);
    background: rgba(15, 23, 42, 0.4);
    border-radius: 12px;
    z-index: 90;
}

.kural-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

@media print {
    .kural-footer {
        display: none !important;
    }
}

/* 2-Page navigation and Page 2 legacy layout */
.nav-tabs {
    display: flex;
    gap: 0.5rem;
    margin-right: 1.5rem;
}
.nav-tab-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.nav-tab-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}
.nav-tab-btn.active {
    background: var(--accent-gold-glow);
    border-color: var(--accent-gold);
    color: var(--text-primary);
    box-shadow: var(--shadow-glow);
}

.page-view {
    width: 100%;
    height: calc(100vh - 150px);
    overflow-y: auto;
}

.legacy-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

@media (max-width: 900px) {
    .legacy-grid {
        grid-template-columns: 1fr;
        padding: 1rem;
    }
}

.legacy-card, .guide-card, .warning-card, .donation-card, .calculator-card, .feedback-card {
    padding: 1.5rem;
    border-radius: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
}

.adsense-placeholder {
    background: rgba(255, 255, 255, 0.02);
    border: 2px dashed rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.adsense-placeholder .ad-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* Global theme selection dropdown */
.theme-dropdown {
    background: rgba(30, 41, 59, 0.8);
    color: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    outline: none;
}
.theme-dropdown option {
    background: #0f172a;
    color: #fff;
}

/* Small visual node avatar circles */
.small-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: bold;
    color: #fff;
}
.small-avatar.male {
    background: var(--gender-male-bg);
    border: 1.5px solid var(--gender-male);
}
.small-avatar.female {
    background: var(--gender-female-bg);
    border: 1.5px solid var(--gender-female);
}

/* Photo cropping helper */
.photo-crop-info {
    font-size: 0.72rem;
    color: var(--text-secondary);
    line-height: 1.4;
    display: block;
    margin-top: 0.4rem;
}

/* --- 2-Page Navigation Tabs --- */
.nav-tabs {
    display: flex;
    gap: 0.25rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    padding: 0.25rem;
    border-radius: 12px;
    margin: 0 1rem;
    backdrop-filter: blur(8px);
}

.nav-tab-btn {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-secondary);
    padding: 0.45rem 0.85rem;
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.2s ease;
}

.nav-tab-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-tab-btn.active {
    color: var(--accent-gold);
    background: rgba(212, 175, 55, 0.15);
    border: 1px solid var(--accent-gold-glow);
    text-shadow: 0 0 8px var(--accent-gold-glow);
}

/* --- Global Theme Select Box --- */
.theme-dropdown {
    background: rgba(15, 23, 42, 0.8);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.45rem 0.75rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    outline: none;
    transition: all 0.2s ease;
    margin-right: 0.5rem;
}

.theme-dropdown:hover, .theme-dropdown:focus {
    border-color: var(--accent-gold);
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.15);
}

/* --- Page Views & Legacy Grid --- */
.page-view {
    display: none;
    width: 100%;
    flex: 1;
    min-height: 0;
}

.page-view.active {
    display: flex;
    flex-direction: column;
}

#page-builder {
    overflow: hidden;
}

#page-legacy {
    overflow-y: auto;
}

.legacy-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

@media (min-width: 992px) {
    .legacy-grid {
        grid-template-columns: 1.8fr 1fr;
    }
}

/* --- Legacy Cards --- */
.legacy-card, .guide-card, .warning-card, .donation-card, .calculator-card, .feedback-card {
    padding: 1.75rem;
    border-radius: 16px;
    box-shadow: var(--shadow-premium);
}

/* --- AdSense Placeholders --- */
.adsense-placeholder {
    min-height: 120px;
    border: 1.5px dashed var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    background: rgba(15, 23, 42, 0.3);
    color: var(--text-muted);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.adsense-placeholder .ad-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.6;
}