/* ==========================================================================
   PARLIAMENT HEMICYCLE GENERATOR - PREMIUM DARK STYLESHEET
   ========================================================================== */

:root {
    /* Color Palette */
    --bg-main: #060913;
    --bg-surface: rgba(13, 20, 38, 0.6);
    --bg-surface-opaque: #0d1426;
    --bg-input: rgba(7, 10, 19, 0.7);
    --border-color: rgba(255, 255, 255, 0.06);
    --border-color-focus: rgba(99, 102, 241, 0.5);
    
    /* Neon Glow/Accents */
    --accent-primary: #6366f1; /* Indigo */
    --accent-secondary: #0ea5e9; /* Sky Blue */
    --accent-purple: #a855f7;
    --accent-green: #10b981;
    --accent-red: #f43f5e;
    --accent-yellow: #eab308;
    
    /* Text */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Cards & Interfaces */
    --card-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    --radius-lg: 20px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Override */
body.light-theme {
    --bg-main: #f1f5f9; /* Softened light grey background */
    --bg-surface: rgba(255, 255, 255, 0.9); /* Softer surface card background */
    --bg-surface-opaque: #f8fafc; /* Softer solid surface */
    --bg-input: #f1f5f9; /* Recessed inputs match main bg */
    --border-color: rgba(15, 23, 42, 0.08);
    --border-color-focus: rgba(99, 102, 241, 0.6);
    
    --accent-primary: #4f46e5;
    --accent-secondary: #0284c7;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    --card-shadow: 0 10px 30px rgba(15, 23, 42, 0.03), inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

body.light-theme .glow-bg {
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(14, 165, 233, 0.03) 0%, transparent 40%);
}

/* Light Theme Element Customizations */
body.light-theme .sidebar-panel {
    background: rgba(255, 255, 255, 0.85);
}

body.light-theme .sidebar-panel::-webkit-scrollbar-thumb,
body.light-theme .party-list::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.1);
}

body.light-theme .sidebar-panel::-webkit-scrollbar-thumb:hover,
body.light-theme .party-list::-webkit-scrollbar-thumb:hover {
    background: rgba(99, 102, 241, 0.3);
}

body.light-theme .logo h1 {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.light-theme .tooltip {
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--text-primary);
    box-shadow: 0 10px 25px -10px rgba(15, 23, 42, 0.15);
}

body.light-theme .svg-container {
    background: #ffffff; /* Canvas remains pure white */
    box-shadow: inset 0 2px 8px rgba(15, 23, 42, 0.03), 0 4px 20px rgba(15, 23, 42, 0.02);
}

body.light-theme .btn-secondary {
    background: rgba(15, 23, 42, 0.04);
    color: var(--text-primary);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

body.light-theme .btn-secondary:hover {
    background: rgba(15, 23, 42, 0.08);
    border-color: rgba(15, 23, 42, 0.12);
}

body.light-theme .btn-export {
    background: rgba(15, 23, 42, 0.02);
    color: var(--text-secondary);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

body.light-theme .btn-export:hover {
    background: rgba(15, 23, 42, 0.06);
    color: var(--text-primary);
}

body.light-theme .preset-btn {
    background: #ffffff;
    border-color: rgba(15, 23, 42, 0.08);
    color: var(--text-secondary);
}

body.light-theme .preset-btn:hover {
    background: rgba(99, 102, 241, 0.06);
    border-color: var(--border-color-focus);
    color: var(--text-primary);
}

body.light-theme .empty-state h2 {
    background: linear-gradient(135deg, var(--text-primary) 40%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.light-theme .chart-title {
    background: linear-gradient(to right, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.light-theme .seat-dot:hover {
    stroke: #ffffff;
    stroke-width: 1.5px;
    filter: drop-shadow(0 0 6px var(--seat-color, #000000));
}

/* Base resets */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    line-height: 1.5;
    transition: background-color 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
                color 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global transitions for elements to animate smoothly on theme toggle */
.sidebar-panel, 
.section-card, 
.party-item, 
input, 
select, 
button, 
.svg-container, 
.legend-item,
.theme-toggle-btn {
    transition: background-color 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
                border-color 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
                color 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Ambient Neon Glow Backgrounds */
.glow-bg {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    pointer-events: none;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(14, 165, 233, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(168, 85, 247, 0.04) 0%, transparent 50%);
    background-repeat: no-repeat;
    background-size: cover;
}

/* Grid & Layout */
.app-container {
    display: grid;
    grid-template-columns: 420px 1fr;
    height: 100vh;
    overflow: hidden;
}

@media (max-width: 1100px) {
    .app-container {
        grid-template-columns: 1fr;
        height: auto;
        overflow: auto;
    }
    
    .sidebar-panel {
        height: auto !important;
        border-right: none !important;
        border-bottom: 1px solid var(--border-color);
        max-height: none !important;
    }
}

/* Sidebar Styling */
.sidebar-panel {
    background: rgba(8, 12, 24, 0.85);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    height: 100vh;
    max-height: 100vh;
}

/* Scrollbar Customization */
.sidebar-panel::-webkit-scrollbar,
.party-list::-webkit-scrollbar {
    width: 6px;
}

.sidebar-panel::-webkit-scrollbar-track,
.party-list::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-panel::-webkit-scrollbar-thumb,
.party-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

.sidebar-panel::-webkit-scrollbar-thumb:hover,
.party-list::-webkit-scrollbar-thumb:hover {
    background: rgba(99, 102, 241, 0.4);
}

/* App Header & Logo Row */
.app-header {
    margin-bottom: 0.5rem;
}

.logo-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.theme-toggle-btn {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
}

.theme-toggle-btn:hover {
    border-color: var(--border-color-focus);
    background: rgba(99, 102, 241, 0.15);
    transform: rotate(15deg);
}

.theme-toggle-icon {
    font-size: 1.15rem;
}

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

.logo-icon {
    font-size: 1.8rem;
}

.logo h1 {
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
    font-size: 1.8rem;
    background: linear-gradient(135deg, #ffffff 30%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
    font-weight: 400;
}

/* Cards */
.section-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: var(--card-shadow);
}

.section-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    letter-spacing: 0.2px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Presets Grid */
.presets-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.presets-grid button:last-child {
    grid-column: span 2;
}

.preset-btn {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    padding: 0.6rem 0.8rem;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.preset-btn:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--border-color-focus);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.preset-btn .flag {
    font-size: 0.95rem;
}

/* Form Styling */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group-row .form-group {
    margin-bottom: 0;
}

label {
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.8px;
    color: var(--text-secondary);
}

input[type="text"],
input[type="number"],
select {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    font-weight: 400;
    outline: none;
    transition: var(--transition-smooth);
    width: 100%;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.input-hint {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
}

/* Custom range inputs */
input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: var(--bg-input);
    border-radius: 10px;
    outline: none;
    margin-top: 0.75rem;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent-primary);
    transition: var(--transition-smooth);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

/* Party List */
.parties-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.party-count-badge {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-primary);
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    border: 1px solid rgba(99, 102, 241, 0.25);
}

.party-list {
    max-height: 230px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding-right: 0.25rem;
}

.party-item {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.5rem 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    animation: itemEnter 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    transition: var(--transition-smooth);
}

.party-item:hover {
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateX(2px);
}

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

.party-item input[type="text"] {
    flex: 2;
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.party-item input[type="number"] {
    flex: 1;
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: 0.85rem;
}

/* Custom Color Picker wrapper */
.color-picker-wrapper {
    position: relative;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border-color);
    cursor: pointer;
}

.color-picker-wrapper input[type="color"] {
    position: absolute;
    top: -5px;
    left: -5px;
    width: 42px;
    height: 42px;
    border: none;
    cursor: pointer;
    background: none;
}

.btn-remove-party {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.2rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
}

.btn-remove-party:hover {
    color: var(--accent-red);
    background: rgba(244, 63, 94, 0.1);
}

/* Buttons */
.btn {
    border: none;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary) 0%, #4f46e5 100%);
    color: #ffffff;
    border-radius: var(--radius-md);
    padding: 0.9rem 1.5rem;
    width: 100%;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1.5px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.7rem 1.2rem;
    width: 100%;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.export-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.btn-export {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.65rem 1rem;
    font-size: 0.8rem;
}

.btn-export:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

/* Main Workspace Output styling */
.workspace-panel {
    padding: 3rem 2.5rem;
    overflow-y: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    height: 100vh;
}

/* Empty State visual */
.empty-state {
    text-align: center;
    max-width: 480px;
    animation: fadeIn 0.4s ease;
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 20px rgba(99, 102, 241, 0.2));
}

.empty-state h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, #ffffff 40%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.empty-state .btn {
    display: inline-flex;
    margin: 0 auto;
}

/* Visualization Display container */
.chart-display {
    width: 100%;
    max-width: 960px;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.chart-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.3px;
    background: linear-gradient(to right, #ffffff, var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.badge-row {
    display: flex;
    gap: 0.5rem;
}

.info-badge {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.4rem 0.8rem;
    border-radius: 30px;
}

.info-badge.success {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.25);
    color: var(--accent-green);
}

/* SVG Rendering workspace */
.svg-container {
    position: relative;
    background: rgba(13, 20, 38, 0.4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 4px 30px rgba(0, 0, 0, 0.3);
    margin-bottom: 1.5rem;
}

#hemicycleChart {
    width: 100%;
    height: 100%;
    max-height: 420px;
}

/* SVG interactive nodes styling */
.seat-dot {
    cursor: pointer;
    transition: var(--transition-smooth);
    transform-origin: center;
}

.seat-dot:hover {
    stroke: #ffffff;
    stroke-width: 1.5px;
    filter: drop-shadow(0 0 6px var(--seat-color, #ffffff));
}

/* Interactive SVG tooltip */
.tooltip {
    position: absolute;
    background: rgba(10, 15, 30, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 0.6rem 0.9rem;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.8rem;
    pointer-events: none;
    box-shadow: 0 10px 25px -10px rgba(0,0,0,0.5);
    z-index: 100;
    transition: opacity 0.15s ease;
    backdrop-filter: blur(5px);
}

.tooltip-title {
    font-weight: 700;
    margin-bottom: 0.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tooltip-color-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.tooltip-detail {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

/* Legend Styling */
.legend-panel {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
}

.legend-title {
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}

.legend-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 0.75rem;
}

.legend-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-md);
    padding: 0.6rem 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: var(--transition-smooth);
}

.legend-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.legend-color-box {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    box-shadow: 0 0 5px var(--party-color);
}

.legend-info {
    display: flex;
    flex-direction: column;
}

.legend-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 120px;
}

.legend-stats {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Dynamic Text Shadows for SVG Seat Count */
.total-seats-text {
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.15);
}

body.light-theme .total-seats-text {
    text-shadow: 0 0 10px rgba(15, 23, 42, 0.05);
}

/* App Footer styling */
.app-footer {
    margin-top: auto;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.app-footer a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
}

.app-footer a:hover {
    color: var(--accent-primary);
}

.app-footer .powered-by {
    font-size: 0.65rem;
    margin-top: 0.2rem;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    color: var(--text-muted);
}