/* ==========================================================================
   Base CSS & Variables System (Plus Jakarta Sans)
   ========================================================================== */
:root {
    /* Fonts */
    --font-primary: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    /* Transition Speed */
    --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Layout Dimensions */
    --header-height: 68px;
    --border-radius-sm: 8px;
    --border-radius-md: 14px;
    --border-radius-lg: 20px;
    --border-radius-xl: 28px;
}

/* Theme 1: Dark Theme (Default) */
html[data-theme="dark"] {
    color-scheme: dark;
    
    /* Brand Colors */
    --brand-primary: #a78bfa;     /* Violet/Purple */
    --brand-secondary: #38bdf8;   /* Sky Blue */
    --brand-accent: #fb7185;      /* Pink/Rose */
    --brand-gradient: linear-gradient(135deg, #a78bfa 0%, #38bdf8 100%);
    --brand-gradient-warm: linear-gradient(135deg, #a78bfa 0%, #fb7185 100%);
    
    /* Backgrounds */
    --bg-base: #050814;
    --bg-canvas-sky: #0d1526;
    --bg-canvas-ground: #090d1a;
    --bg-surface: rgba(15, 22, 45, 0.6);
    --bg-card: rgba(22, 32, 58, 0.5);
    --bg-card-hover: rgba(28, 42, 72, 0.75);
    --bg-input: rgba(10, 16, 35, 0.7);
    --bg-button-secondary: rgba(167, 139, 250, 0.08);
    --bg-button-secondary-hover: rgba(167, 139, 250, 0.18);
    
    /* Text */
    --text-primary: #f0f4ff;
    --text-secondary: #c7d2ef;
    --text-muted: #7b8bb8;
    --text-inverse: #05080f;
    
    /* Borders & Lines */
    --border-color: rgba(167, 139, 250, 0.1);
    --border-color-hover: rgba(167, 139, 250, 0.25);
    --ruler-line: rgba(167, 139, 250, 0.15);
    --ruler-text: rgba(167, 139, 250, 0.55);
    --grid-line: rgba(167, 139, 250, 0.04);
    --floor-glow: rgba(167, 139, 250, 0.25);
    
    /* Shadow & Glows */
    --card-shadow: 0 8px 40px 0 rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255,255,255,0.04);
    --glow-effect: drop-shadow(0 0 14px var(--brand-primary));
    --button-shadow: 0 4px 20px 0 rgba(167, 139, 250, 0.35);
    --hero-glow: radial-gradient(ellipse at 50% 0%, rgba(167, 139, 250, 0.15) 0%, transparent 60%);
    
    /* Scrollbars */
    --scrollbar-thumb: rgba(167, 139, 250, 0.2);
    --scrollbar-track: rgba(0, 0, 0, 0.3);
}

/* Theme 2: Light Theme Override */
html[data-theme="light"] {
    color-scheme: light;
    
    /* Brand Colors */
    --brand-primary: #7c3aed;
    --brand-secondary: #0284c7;
    --brand-accent: #e11d48;
    --brand-gradient: linear-gradient(135deg, #7c3aed 0%, #0284c7 100%);
    --brand-gradient-warm: linear-gradient(135deg, #7c3aed 0%, #e11d48 100%);
    
    /* Backgrounds */
    --bg-base: #f5f7ff;
    --bg-canvas-sky: #eef2ff;
    --bg-canvas-ground: #dde4f5;
    --bg-surface: rgba(255, 255, 255, 0.85);
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-card-hover: rgba(255, 255, 255, 1);
    --bg-input: #ffffff;
    --bg-button-secondary: rgba(124, 58, 237, 0.06);
    --bg-button-secondary-hover: rgba(124, 58, 237, 0.12);
    
    /* Text */
    --text-primary: #0f172a;
    --text-secondary: #1e293b;
    --text-muted: #64748b;
    --text-inverse: #ffffff;
    
    /* Borders & Lines */
    --border-color: rgba(124, 58, 237, 0.1);
    --border-color-hover: rgba(124, 58, 237, 0.22);
    --ruler-line: rgba(124, 58, 237, 0.15);
    --ruler-text: rgba(124, 58, 237, 0.6);
    --grid-line: rgba(124, 58, 237, 0.05);
    --floor-glow: rgba(124, 58, 237, 0.15);
    
    /* Shadows */
    --card-shadow: 0 4px 24px 0 rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15,23,42,0.04);
    --glow-effect: drop-shadow(0 0 12px var(--brand-primary));
    --button-shadow: 0 4px 20px 0 rgba(124, 58, 237, 0.3);
    --hero-glow: radial-gradient(ellipse at 50% 0%, rgba(124, 58, 237, 0.08) 0%, transparent 60%);
    
    /* Scrollbars */
    --scrollbar-thumb: rgba(124, 58, 237, 0.18);
    --scrollbar-track: rgba(15, 23, 42, 0.05);
}

/* Accent Color setting for browser elements */
html {
    accent-color: var(--brand-primary);
    scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
    scroll-behavior: smooth;
}

/* ==========================================================================
   Reset & Global Styles
   ========================================================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: var(--font-primary);
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Dark mode ambient noise texture overlay */
html[data-theme="dark"] body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: var(--hero-glow);
    pointer-events: none;
    z-index: 0;
}

/* Scrollbars styling */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--scrollbar-track); border-radius: 3px; }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-color-hover); }

/* ==========================================================================
   Header
   ========================================================================== */
.app-header {
    height: var(--header-height);
    background-color: var(--bg-surface);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1520px;
    height: 100%;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--brand-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 12px rgba(167, 139, 250, 0.4);
    flex-shrink: 0;
}

.logo-text {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.logo-accent {
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.45rem 1rem;
    border-radius: 100px;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
    background-color: var(--bg-button-secondary);
}

.nav-link.active {
    color: var(--brand-primary);
    background-color: var(--bg-button-secondary);
    font-weight: 600;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.theme-toggle-btn {
    background: var(--bg-button-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
    background: var(--bg-button-secondary-hover);
    border-color: var(--brand-primary);
    transform: rotate(12deg) scale(1.05);
}

/* Toggle Sun/Moon display */
html[data-theme="dark"] .icon-moon { display: none; }
html[data-theme="light"] .icon-sun { display: none; }

/* ==========================================================================
   Main Layout Containers
   ========================================================================== */
.app-container {
    max-width: 1520px;
    margin: 0 auto;
    width: 100%;
    padding: 0 2rem 3rem;
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 1.75rem;
    flex: 1;
    align-items: start;
    position: relative;
    z-index: 1;
}

/* ==========================================================================
   Control Panel & Forms (Sidebar)
   ========================================================================== */
.control-panel {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    position: sticky;
    top: calc(var(--header-height) + 1.5rem);
    max-height: calc(100vh - var(--header-height) - 3rem);
    overflow-y: auto;
    padding-right: 4px;
    padding-bottom: 1rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.group-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    padding: 0 0.25rem;
}

.glass-card {
    background-color: var(--bg-surface);
    backdrop-filter: blur(20px) saturate(160%);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.4rem;
    box-shadow: var(--card-shadow);
    transition: border-color var(--transition-fast);
}

.glass-card:hover {
    border-color: var(--border-color-hover);
}

.card-heading {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

/* Unit Toggle */
.unit-toggle-container {
    display: flex;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 4px;
    gap: 4px;
}

.unit-btn {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 9px 12px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.unit-btn.active {
    background: var(--brand-gradient);
    color: white;
    box-shadow: 0 2px 10px rgba(167, 139, 250, 0.3);
}

/* Form Styles */
#addFigureForm {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.field-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.3px;
}

.form-input,
.form-select {
    width: 100%;
    background-color: var(--bg-input);
    border: 1.5px solid var(--border-color);
    border-radius: var(--border-radius-md);
    color: var(--text-primary);
    padding: 11px 15px;
    font-size: 0.92rem;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    font-weight: 500;
}

.form-input:focus,
.form-select:focus {
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.15);
}

html[data-theme="light"] .form-input:focus,
html[data-theme="light"] .form-select:focus {
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.12);
}

.form-select {
    cursor: pointer;
    appearance: auto;
}

.form-select optgroup {
    background-color: var(--bg-base);
    font-weight: 700;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.form-select option {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-size: 0.88rem;
    padding: 6px;
}

/* Height Labels Row */
.height-labels-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.display-badge {
    background: var(--brand-gradient);
    color: white;
    font-size: 0.8rem;
    font-weight: 800;
    padding: 3px 10px;
    border-radius: 100px;
    box-shadow: var(--button-shadow);
    letter-spacing: 0.3px;
}

.height-input-wrapper { width: 100%; }

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

.input-with-suffix {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-suffix .form-input {
    padding-right: 46px;
}

.input-suffix {
    position: absolute;
    right: 14px;
    color: var(--text-muted);
    font-size: 0.82rem;
    font-weight: 700;
    pointer-events: none;
    letter-spacing: 0.3px;
}

/* Slider Styles */
.slider-container {
    margin-top: 0.4rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.height-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 5px;
    border-radius: 100px;
    background: var(--border-color);
    outline: none;
    cursor: pointer;
    background-image: var(--brand-gradient);
    background-size: 50% 100%;
    background-repeat: no-repeat;
}

.height-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: white;
    cursor: pointer;
    box-shadow: 0 0 0 3px var(--brand-primary), 0 4px 12px rgba(167, 139, 250, 0.5);
    transition: transform var(--transition-bounce);
    border: none;
}

.height-slider::-webkit-slider-thumb:hover,
.height-slider:active::-webkit-slider-thumb {
    transform: scale(1.2);
}

.slider-bounds {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 600;
}

/* Color Presets Picker */
.color-preset-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.5rem;
    align-items: center;
}

.color-dot {
    background-color: var(--preset-color);
    width: 100%;
    aspect-ratio: 1;
    border-radius: 50%;
    border: 3px solid transparent;
    cursor: pointer;
    transition: all var(--transition-bounce);
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.color-dot:hover {
    transform: scale(1.15);
}

.color-dot.active {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 4px var(--preset-color), 0 0 0 5px transparent;
    transform: scale(1.1);
}

.custom-color-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.custom-color-wrapper:hover {
    border-color: var(--brand-primary);
}

.custom-color-picker {
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    border: none;
    outline: none;
    cursor: pointer;
}

.custom-color-label {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0,0,0,0.35);
    color: white;
    pointer-events: none;
    cursor: pointer;
    border-radius: 50%;
}

/* Buttons */
.btn-primary {
    background: var(--brand-gradient);
    border: none;
    color: white;
    font-weight: 700;
    font-size: 0.92rem;
    padding: 13px 20px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: var(--button-shadow);
    transition: all var(--transition-fast);
    letter-spacing: 0.2px;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(rgba(255,255,255,0.12), transparent);
    pointer-events: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(167, 139, 250, 0.45);
}

.btn-primary:active {
    transform: translateY(0);
}

/* Added Figures List */
.list-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.text-btn-danger {
    background: transparent;
    border: none;
    color: #f87171;
    font-size: 0.78rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 3px 8px;
    border-radius: 6px;
}

.text-btn-danger:hover {
    background-color: rgba(239, 68, 68, 0.08);
    color: #ef4444;
}

.active-figures-list {
    max-height: 360px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    padding-right: 4px;
}

.empty-placeholder {
    text-align: center;
    padding: 2rem 1rem;
    border: 1.5px dashed var(--border-color);
    border-radius: var(--border-radius-lg);
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.55;
}

/* Figure Cards in sidebar */
.figure-card {
    background-color: var(--bg-card);
    border: 1.5px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 0.85rem 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    transition: all var(--transition-fast);
    cursor: default;
}

.figure-card:hover {
    background-color: var(--bg-card-hover);
    border-color: var(--border-color-hover);
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.figure-card.active-focus {
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.12);
}

.card-top-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.card-identity {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    overflow: hidden;
    flex: 1;
    min-width: 0;
}

.card-color-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 6px currentColor;
}

.card-name-title {
    font-size: 0.88rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.card-meta {
    font-size: 0.72rem;
    color: var(--text-muted);
    white-space: nowrap;
    font-weight: 500;
}

.card-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    flex-shrink: 0;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    width: 26px;
    height: 26px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.icon-btn:hover {
    color: var(--text-primary);
    background-color: var(--bg-button-secondary-hover);
}

.icon-btn.btn-delete:hover {
    color: #f87171;
    background-color: rgba(239, 68, 68, 0.1);
}

/* Card Inline Sliders */
.card-adjust-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.adjust-input {
    width: 52px;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    padding: 3px 5px;
    font-size: 0.73rem;
    text-align: center;
    outline: none;
    font-weight: 600;
    transition: border-color var(--transition-fast);
}

.adjust-input:focus {
    border-color: var(--brand-primary);
}

.adjust-slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 3px;
    border-radius: 100px;
    background: var(--border-color);
    outline: none;
    cursor: pointer;
}

.adjust-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--brand-primary);
    cursor: pointer;
    box-shadow: 0 0 6px rgba(167, 139, 250, 0.5);
    transition: transform var(--transition-fast);
}

.adjust-slider::-webkit-slider-thumb:hover {
    transform: scale(1.3);
}

/* ==========================================================================
   Visual Canvas Layout (Right Section)
   ========================================================================== */
.canvas-section {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    min-width: 0;
}

/* Toolbar */
.canvas-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 0.7rem 1.2rem;
    box-shadow: var(--card-shadow);
}

.toolbar-left {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.toggle-option {
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.toggle-option input[type="checkbox"] {
    cursor: pointer;
    width: 15px;
    height: 15px;
    accent-color: var(--brand-primary);
    border-radius: 4px;
}

.checkbox-label {
    font-size: 0.83rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    user-select: none;
    transition: color var(--transition-fast);
}

.checkbox-label:hover {
    color: var(--text-primary);
}

.btn-secondary {
    background-color: var(--bg-button-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.83rem;
    padding: 8px 16px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.45rem;
    transition: all var(--transition-fast);
}

.btn-secondary:hover {
    background-color: var(--bg-button-secondary-hover);
    border-color: var(--brand-primary);
    color: var(--brand-primary);
    transform: translateY(-1px);
}

/* ==========================================================================
   Grid Board (Canvas Stage)
   ========================================================================== */
.board-wrapper {
    background: linear-gradient(to top, var(--bg-canvas-ground) 0%, var(--bg-canvas-sky) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--card-shadow), inset 0 0 80px rgba(0,0,0,0.15);
    overflow-x: auto;
    position: relative;
}

/* Ground glow line at bottom of canvas */
.board-wrapper::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50px;
    right: 50px;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--floor-glow), transparent);
    border-radius: 100px;
}

.grid-board {
    height: 620px;
    min-width: 820px;
    position: relative;
    display: flex;
    justify-content: space-between;
}

/* Rulers */
.ruler {
    width: 52px;
    height: 100%;
    position: relative;
    border-right: 1px solid var(--ruler-line);
    z-index: 10;
    background: linear-gradient(to right, transparent, rgba(7, 10, 19, 0.25));
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    flex-shrink: 0;
}

.ruler-right {
    border-right: none;
    border-left: 1px solid var(--ruler-line);
    background: linear-gradient(to left, transparent, rgba(7, 10, 19, 0.25));
}

html[data-theme="light"] .ruler {
    background: linear-gradient(to right, transparent, rgba(245, 247, 255, 0.4));
}

html[data-theme="light"] .ruler-right {
    background: linear-gradient(to left, transparent, rgba(245, 247, 255, 0.4));
}

/* Dynamic Ruler tick marks */
.ruler-tick {
    position: absolute;
    right: 0;
    width: 8px;
    height: 1px;
    background-color: var(--ruler-line);
}

.ruler-tick.major {
    width: 18px;
    background-color: var(--ruler-text);
}

.ruler-right .ruler-tick {
    right: auto;
    left: 0;
}

.ruler-label {
    position: absolute;
    right: 24px;
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--ruler-text);
    transform: translateY(-50%);
    white-space: nowrap;
    letter-spacing: 0.2px;
}

.ruler-right .ruler-label {
    right: auto;
    left: 24px;
}

/* Grid lines inside canvas */
.grid-line {
    position: absolute;
    left: 0;
    right: 0;
    height: 1px;
    background-color: var(--grid-line);
    pointer-events: none;
    z-index: 1;
}

/* Stage where figures stand */
.figures-stage {
    flex-grow: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 24px;
    height: 100%;
    padding: 20px 30px 0;
    z-index: 5;
    overflow-x: auto;
}

/* ==========================================================================
   Figure Silhouettes & Wrappers
   ========================================================================== */
.figure-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    height: 100%;
    justify-content: flex-end;
    animation: slideUpFigure 0.45s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    cursor: pointer;
    flex-shrink: 0;
    width: 100px;
}

@keyframes slideUpFigure {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.92);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.figure-svg-container {
    width: 100%;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    transition: filter var(--transition-fast);
}

.figure-svg-container svg {
    width: auto;
    max-width: 100%;
    height: 100%;
    transition: all var(--transition-fast);
    overflow: visible;
}

/* Base silhouette stroke + fill — single path element */
.figure-wrapper .svg-silhouette-path {
    stroke: var(--figure-color);
    stroke-width: 2px;
    fill: var(--figure-color);
    fill-opacity: 0.18;
    transition: all var(--transition-fast);
}

/* Hover glow */
.figure-wrapper:hover .svg-silhouette-path,
.figure-wrapper.hovered .svg-silhouette-path {
    fill-opacity: 0.32;
    stroke-width: 3px;
    filter: drop-shadow(0 0 12px var(--figure-color));
}

.figure-wrapper.active-focus .svg-silhouette-path {
    fill-opacity: 0.38;
    stroke-width: 3.5px;
    filter: drop-shadow(0 0 18px var(--figure-color));
}

/* Floor shadow beneath each figure */
.figure-wrapper::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 6px;
    background: var(--figure-color);
    opacity: 0.15;
    border-radius: 50%;
    filter: blur(5px);
    transition: opacity var(--transition-fast), width var(--transition-fast);
    pointer-events: none;
}

.figure-wrapper:hover::after {
    opacity: 0.3;
    width: 80%;
}

/* Name label below figure */
.figure-name-label {
    background-color: var(--bg-surface);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    padding: 5px 12px;
    border-radius: 100px;
    margin-top: 10px;
    margin-bottom: 4px;
    font-size: 0.72rem;
    font-weight: 700;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    white-space: nowrap;
    z-index: 10;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    letter-spacing: 0.2px;
}

.figure-wrapper:hover .figure-name-label {
    border-color: var(--figure-color);
    box-shadow: 0 0 10px rgba(0,0,0,0.1), 0 0 0 2px rgba(var(--figure-color), 0.1);
}

/* Height label */
.figure-height-label {
    font-size: 0.75rem;
    font-weight: 800;
    color: var(--figure-color);
    margin-bottom: 10px;
    z-index: 10;
    letter-spacing: 0.3px;
    text-shadow: 0 0 10px var(--figure-color);
}

/* Interactive Reference Guideline overlay */
.interactive-ref-line {
    position: absolute;
    left: 52px;
    right: 52px;
    height: 0;
    border-top: 1.5px dashed var(--ref-color, var(--brand-primary));
    pointer-events: none;
    z-index: 8;
    transition: top var(--transition-fast);
}

.ref-line-badge {
    position: absolute;
    left: 8px;
    background-color: var(--ref-color, var(--brand-primary));
    color: white;
    font-size: 0.67rem;
    font-weight: 800;
    padding: 3px 8px;
    border-radius: 100px;
    transform: translateY(-50%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
    white-space: nowrap;
    letter-spacing: 0.3px;
}

/* ==========================================================================
   Quick Preset Bar
   ========================================================================== */
.presets-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--bg-surface);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 0.75rem 1.2rem;
    box-shadow: var(--card-shadow);
}

.presets-label {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-muted);
    flex-shrink: 0;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.preset-add-btn {
    background-color: var(--bg-button-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 5px 14px;
    border-radius: 100px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    letter-spacing: 0.1px;
}

.preset-add-btn:hover {
    background-color: var(--brand-primary);
    border-color: var(--brand-primary);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(167, 139, 250, 0.35);
}

/* ==========================================================================
   Analytics Card
   ========================================================================== */
.analytics-card {
    min-height: 100px;
}

.analytics-instruction {
    color: var(--text-muted);
    font-size: 0.88rem;
    text-align: center;
    padding: 1rem 0;
    line-height: 1.5;
}

.analytics-dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.85rem;
    margin-bottom: 1.4rem;
}

.metric-stat-box {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 1rem;
    text-align: center;
    transition: border-color var(--transition-fast);
}

.metric-stat-box:hover {
    border-color: var(--border-color-hover);
}

.metric-title {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 0.4rem;
}

.metric-value {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
}

.comparison-matrix-box {
    border-top: 1px solid var(--border-color);
    padding-top: 1.25rem;
}

.matrix-heading {
    font-size: 0.82rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.matrix-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 220px;
    overflow-y: auto;
    padding-right: 4px;
}

.matrix-row {
    background-color: var(--bg-card);
    border-left: 4px solid var(--row-accent, var(--brand-primary));
    padding: 8px 14px;
    border-radius: 0 10px 10px 0;
    font-size: 0.83rem;
    line-height: 1.4;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    transition: background-color var(--transition-fast);
}

.matrix-row:hover {
    background-color: var(--bg-card-hover);
}

.matrix-desc {
    color: var(--text-primary);
    flex: 1;
    min-width: 0;
}

.matrix-diff {
    font-weight: 800;
    color: var(--row-accent);
    white-space: nowrap;
    font-size: 0.88rem;
}

/* ==========================================================================
   Info Section (SEO Content Below)
   ========================================================================== */
.info-section {
    background: linear-gradient(to bottom, var(--bg-surface), transparent);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--border-color);
    padding: 5rem 2rem;
    margin-top: 1rem;
    position: relative;
    z-index: 1;
}

.info-container {
    max-width: 1100px;
    margin: 0 auto;
}

.info-section h1 {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.75px;
    margin-bottom: 1rem;
    text-align: center;
    line-height: 1.2;
}

.intro-lead {
    color: var(--text-muted);
    font-size: 1.05rem;
    text-align: center;
    line-height: 1.65;
    max-width: 760px;
    margin: 0 auto 3.5rem auto;
    font-weight: 400;
}

/* Article content styles for readable prose */
.article-content {
    max-width: 800px;
    margin: 0 auto 4rem auto;
    padding: 0 1rem;
    color: var(--text-secondary);
}

.article-content h2 {
    font-size: clamp(1.4rem, 2.5vw, 1.8rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-top: 3rem;
    margin-bottom: 1.25rem;
    text-align: left;
    letter-spacing: -0.5px;
    line-height: 1.3;
}

.article-content h3 {
    font-size: clamp(1.2rem, 2vw, 1.45rem);
    font-weight: 750;
    color: var(--text-primary);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.article-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.article-content p {
    font-size: 0.95rem;
    line-height: 1.75;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.article-content ul {
    margin-bottom: 1.5rem;
    padding-left: 1.75rem;
    list-style-type: disc;
}

.article-content li {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 0.65rem;
    color: var(--text-secondary);
}

.article-content a {
    color: var(--brand-primary);
    text-decoration: none;
    font-weight: 600;
    transition: opacity var(--transition-fast);
}

.article-content a:hover {
    opacity: 0.85;
    text-decoration: underline;
}

.article-content img.featured {
    display: block;
    width: 100%;
    max-width: 750px;
    height: auto;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    margin: 2.5rem auto;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.article-content img.featured:hover {
    transform: scale(1.005);
    border-color: var(--border-color-hover);
}

.grid-three-col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.info-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    padding: 2rem 1.5rem;
    text-align: center;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--brand-gradient);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.info-card:hover {
    border-color: var(--border-color-hover);
    transform: translateY(-4px);
    box-shadow: var(--card-shadow);
}

.info-card:hover::before {
    opacity: 1;
}

.card-icon {
    font-size: 2.25rem;
    margin-bottom: 1rem;
    display: block;
}

.info-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.65rem;
    color: var(--text-primary);
}

.info-card p {
    color: var(--text-muted);
    font-size: 0.88rem;
    line-height: 1.65;
}

.section-divider {
    border: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border-color), transparent);
    margin: 4rem 0;
}

.info-section h2 {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 2rem;
    text-align: center;
    letter-spacing: -0.5px;
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.faq-item {
    padding: 1.5rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-fast);
}

.faq-item:hover {
    border-color: var(--border-color-hover);
    box-shadow: var(--card-shadow);
}

.faq-item h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
    color: var(--text-primary);
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.faq-item h4::before {
    content: 'Q';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-gradient);
    color: white;
    font-size: 0.7rem;
    font-weight: 800;
    width: 20px;
    height: 20px;
    border-radius: 6px;
    flex-shrink: 0;
    margin-top: 2px;
}

.faq-item p {
    color: var(--text-muted);
    font-size: 0.88rem;
    line-height: 1.65;
    padding-left: 1.75rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.app-footer {
    background-color: var(--bg-base);
    border-top: 1px solid var(--border-color);
    padding: 3rem 2rem 2rem;
    position: relative;
    z-index: 1;
}

.footer-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto 2.5rem;
    text-align: left;
}

.footer-col h4 {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-col ul li {
    margin-bottom: 0.6rem;
}

.footer-col ul li a {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.footer-col ul li a:hover {
    color: var(--brand-primary);
}

.footer-container {
    text-align: center;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-container p {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.footer-bottom-links {
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    font-size: 0.8rem;
}

.footer-bottom-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.footer-bottom-links a:hover {
    color: var(--brand-primary);
}

/* ==========================================================================
   Responsive Adaptation System
   ========================================================================== */
@media (max-width: 1100px) {
    .app-container {
        grid-template-columns: 1fr;
        padding: 1.5rem;
        gap: 1.5rem;
    }
    
    .control-panel {
        position: static;
        max-height: none;
        overflow-y: visible;
    }
    
    .control-panel {
        order: 2;
    }
    
    .canvas-section {
        order: 1;
    }
    
    .grid-three-col {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
    
    .analytics-dashboard-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: 0 1rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .app-container {
        padding: 1rem;
    }
    
    .grid-board {
        height: 480px;
    }
    
    .info-section {
        padding: 3rem 1rem;
    }
    
    .info-section h1 {
        font-size: 1.6rem;
    }
    
    .analytics-dashboard-grid {
        grid-template-columns: 1fr 1fr 1fr;
        gap: 0.5rem;
    }
    
    .metric-value {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .hero-badge { font-size: 0.7rem; }
    .hero-title { letter-spacing: -0.75px; }
    .presets-row { flex-wrap: wrap; }
    .analytics-dashboard-grid { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Calculators Shared Dropdown & Helper Styles
   ========================================================================== */

/* Dropdown Menu Styles */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    height: 100%;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--bg-surface);
    backdrop-filter: blur(25px) saturate(180%);
    -webkit-backdrop-filter: blur(25px) saturate(180%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    box-shadow: var(--card-shadow);
    padding: 0.5rem;
    min-width: 250px;
    z-index: 1000;
    flex-direction: column;
    gap: 2px;
    animation: dropdownFade 0.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes dropdownFade {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.dropdown:hover .dropdown-menu,
.dropdown:focus-within .dropdown-menu {
    display: flex;
}

.dropdown-item {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.55rem 1rem;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-align: left;
}

.dropdown-item:hover {
    color: var(--text-primary);
    background-color: var(--bg-button-secondary-hover);
    padding-left: 1.2rem;
}

.dropdown-item.active {
    color: var(--brand-primary);
    background-color: var(--bg-button-secondary);
    font-weight: 600;
}

/* Calculator Page Layout Helpers */
.calc-container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 0 2rem 3rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    flex: 1;
    z-index: 1;
}

.calc-header-section {
    text-align: center;
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.calc-title {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.75px;
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.calc-subtitle {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.calc-layout-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 2rem;
    align-items: start;
}

/* Result Card Aesthetics */
.result-box-container {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    height: 100%;
}

.result-card-glow {
    border: 1px solid var(--border-color-hover);
    box-shadow: 0 0 30px rgba(167, 139, 250, 0.1);
    position: relative;
    overflow: hidden;
}

.result-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--brand-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.result-large-value {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -1.5px;
    margin: 0.5rem 0;
    color: var(--text-primary);
}

.result-desc-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* BMI Meter visual */
.bmi-meter-container {
    margin: 1.5rem 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.bmi-meter-track {
    height: 8px;
    border-radius: 100px;
    background: linear-gradient(to right, #60a5fa 0%, #34d399 25%, #fbbf24 60%, #f87171 100%);
    position: relative;
}

.bmi-meter-indicator {
    width: 4px;
    height: 16px;
    background: white;
    border: 2px solid var(--bg-base);
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
    position: absolute;
    top: -4px;
    border-radius: 4px;
    transform: translateX(-50%);
    transition: left 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.bmi-categories-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
}

/* Gauge / Percentile semi-circle dial styles */
.percentile-radial-gauge {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 1.5rem 0;
}

.radial-svg {
    width: 220px;
    height: 120px;
}

.radial-bg {
    fill: none;
    stroke: var(--border-color);
    stroke-width: 12;
    stroke-linecap: round;
}

.radial-fill {
    fill: none;
    stroke: var(--brand-primary);
    stroke-width: 12;
    stroke-linecap: round;
    stroke-dasharray: 283; /* Half circumference for r=90 */
    stroke-dashoffset: 283;
    transition: stroke-dashoffset 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.radial-center-text {
    position: absolute;
    bottom: 24px;
    text-align: center;
}

.radial-value {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-primary);
}

.radial-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
}

/* Country averages table styling */
.calc-table-wrapper {
    overflow-x: auto;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    margin-top: 1rem;
}

.calc-data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    text-align: left;
}

.calc-data-table th, 
.calc-data-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.calc-data-table th {
    background-color: rgba(167, 139, 250, 0.05);
    color: var(--text-primary);
    font-weight: 700;
}

.calc-data-table tr:last-child td {
    border-bottom: none;
}

.calc-data-table tr:hover td {
    background-color: var(--bg-button-secondary-hover);
}

/* Responsive adjustment for Calculator layouts */
@media (max-width: 900px) {
    .calc-layout-grid {
        grid-template-columns: 1fr;
    }
    
    .calc-container {
        padding: 0 1rem 2rem;
    }
}

/* Simplified Mobile Menu Navigation Styles */
.mobile-menu-toggle-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    line-height: 1;
    transition: color var(--transition-fast);
}

.mobile-menu-toggle-btn:hover {
    color: var(--brand-primary);
}

@media (max-width: 768px) {
    .mobile-menu-toggle-btn {
        display: block;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-card);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        align-items: center;
        padding: 1.5rem;
        gap: 1.25rem;
        border-bottom: 1px solid var(--border-color);
        z-index: 999;
    }
    
    .nav-links.active {
        display: flex;
    }
}

/* General Layout & Clean Style Utilities */
.container-single-col {
    grid-template-columns: 1fr;
    max-width: 900px;
    margin: 0 auto;
}

.card-padding-lg {
    padding: 2.5rem;
}

.textarea-resizable {
    resize: vertical;
    min-height: 120px;
}

/* 404 Custom Layout */
.error-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.error-card {
    max-width: 500px;
    padding: 3rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.error-icon {
    font-size: 5rem;
    margin-bottom: 1rem;
}

.error-title {
    margin-bottom: 0.5rem;
    font-size: 2.2rem;
    color: var(--brand-primary);
}

.error-subtitle {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.error-text {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 2rem;
}

/* General Utility Overrides */
.m-0 { margin: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.mb-0-25 { margin-bottom: 0.25rem !important; }
.p-1-5rem { padding: 1.5rem !important; }
.py-1 { padding-top: 1rem !important; padding-bottom: 1rem !important; }
.px-1-25 { padding-left: 1.25rem !important; padding-right: 1.25rem !important; }
.flex-1 { flex: 1 !important; }
.d-flex { display: flex !important; }
.flex-col { flex-direction: column !important; }
.align-center { align-items: center !important; }
.justify-center { justify-content: center !important; }

/* Dedicated Sidebar Database Card & Stage Rules */
.sidebar-db-card {
    padding: 1rem 0 !important;
}
.sidebar-db-heading {
    padding: 0 1.25rem 0.75rem !important;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 0.95rem;
}
.figures-stage-couple {
    gap: 40px !important;
}
.figures-stage-male-female {
    gap: 30px !important;
}

/* Celebrity Selector Catalog Styles */
.category-tab-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.tab-btn {
    background: var(--bg-button-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn:hover:not(.active) {
    background: var(--bg-button-secondary-hover);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--brand-secondary);
    color: #ffffff;
    border-color: var(--brand-secondary);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.celeb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 8px;
    max-height: 350px;
    overflow-y: auto;
    padding-right: 4px;
    margin-top: 8px;
}

.celeb-grid::-webkit-scrollbar {
    width: 5px;
}

.celeb-grid::-webkit-scrollbar-track {
    background: transparent;
}

.celeb-grid::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.celeb-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 8px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    min-height: 90px;
}

.celeb-card:hover {
    transform: translateY(-2px);
    border-color: var(--brand-secondary);
    background: rgba(16, 185, 129, 0.04);
}

.celeb-card.selected {
    border-color: var(--brand-secondary);
    background: rgba(16, 185, 129, 0.08);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.15);
}

.celeb-emoji {
    font-size: 1.4rem;
    margin-bottom: 4px;
}

.celeb-name {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
}

.celeb-height {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--brand-secondary);
    margin-top: 2px;
}