/* ==========================================
   DESIGN SYSTEM & THEME CONFIGURATION
   ========================================== */

:root {
    /* Brand Accent Colors */
    --primary-color: #f59e0b; /* Amber Egg-Yolk */
    --primary-hover: #d97706;
    --primary-glow: rgba(245, 158, 11, 0.2);
    
    --success-color: #10b981; /* Farm Emerald Green */
    --success-hover: #059669;
    --success-glow: rgba(16, 185, 129, 0.15);
    
    --danger-color: #ef4444; /* Culling Red */
    --danger-hover: #dc2626;
    --danger-glow: rgba(239, 68, 68, 0.15);
    
    --info-color: #3b82f6; /* Rearing Blue */
    --info-hover: #2563eb;
    --info-glow: rgba(59, 130, 246, 0.15);

    --warning-color: #eab308;
    
    /* Typography */
    --font-family: 'Montserrat', 'Noto Sans Thai', sans-serif;
    --transition-speed: 0.3s;
    --border-radius-lg: 16px;
    --border-radius-md: 10px;
    --border-radius-sm: 6px;
}

[data-theme="dark"] {
    --bg-app: #080d1a;
    --bg-sidebar: #0f172a;
    --bg-card: rgba(22, 30, 49, 0.7);
    --bg-card-hover: rgba(28, 38, 62, 0.8);
    --border-card: rgba(255, 255, 255, 0.05);
    --border-input: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --bg-input: #1e293b;
    --bg-input-focus: #334155;
    --shadow-card: 0 15px 35px rgba(0, 0, 0, 0.4);
    --glass-blur: blur(16px);
    --bg-table-header: #1e293b;
    --bg-table-row-even: rgba(30, 41, 59, 0.2);
    --bg-table-row-hover: rgba(51, 65, 85, 0.25);
    --timeline-line: #334155;
    --bg-scrollbar: #1e293b;
    --bg-scrollbar-thumb: #475569;
}

[data-theme="light"] {
    --bg-app: #f4f6fa;
    --bg-sidebar: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.75);
    --bg-card-hover: rgba(255, 255, 255, 0.9);
    --border-card: rgba(0, 0, 0, 0.06);
    --border-input: rgba(0, 0, 0, 0.12);
    --text-main: #1e293b;
    --text-muted: #64748b;
    --bg-input: #f8fafc;
    --bg-input-focus: #ffffff;
    --shadow-card: 0 15px 35px rgba(100, 116, 139, 0.08);
    --glass-blur: blur(16px);
    --bg-table-header: #e2e8f0;
    --bg-table-row-even: rgba(241, 245, 249, 0.5);
    --bg-table-row-hover: rgba(226, 232, 240, 0.6);
    --timeline-line: #cbd5e1;
    --bg-scrollbar: #cbd5e1;
    --bg-scrollbar-thumb: #94a3b8;
}

/* ==========================================
   BASE STYLES & LAYOUT
   ========================================== */

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-app);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    width: 280px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-card);
    display: flex;
    flex-direction: column;
    padding: 24px;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: width var(--transition-speed), background-color var(--transition-speed);
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
}

.logo-icon {
    font-size: 2rem;
    filter: drop-shadow(0 0 8px var(--primary-glow));
}

.logo-text h2 {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--text-main);
}

.logo-text span {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    text-align: left;
    transition: all var(--transition-speed) ease;
}

.nav-item i {
    width: 20px;
    height: 20px;
}

.nav-item:hover {
    color: var(--text-main);
    background-color: var(--bg-table-row-even);
    transform: translateX(4px);
}

.nav-item.active {
    background-color: var(--primary-color);
    color: #000000;
    font-weight: 600;
    box-shadow: 0 4px 20px var(--primary-glow);
}

.sidebar-footer {
    border-top: 1px solid var(--border-card);
    padding-top: 20px;
}

.theme-toggle-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.theme-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.app-version {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
}

/* Toggle Switch Styles */
.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 22px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #cbd5e1;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(22px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

/* Main Content Styling */
.main-content {
    margin-left: 280px;
    flex-grow: 1;
    padding: 32px;
    min-height: 100vh;
}

/* Topbar Styling */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 16px;
}

.topbar-left h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.current-date {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.coop-filter-container {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-card);
    padding: 8px 16px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-card);
}

.filter-icon {
    width: 18px;
    height: 18px;
    color: var(--primary-color);
}

.custom-select {
    background: transparent;
    border: none;
    color: var(--text-main);
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 600;
    outline: none;
    cursor: pointer;
}

.custom-select option {
    background-color: var(--bg-sidebar);
    color: var(--text-main);
}

/* ==========================================
   REUSABLE UI COMPONENTS
   ========================================== */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    font-family: var(--font-family);
    font-size: 0.88rem;
    font-weight: 600;
    border-radius: var(--border-radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.78rem;
    border-radius: var(--border-radius-sm);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #000000;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 15px var(--primary-glow);
    transform: translateY(-1px);
}

.btn-success {
    background-color: var(--success-color);
    color: #ffffff;
}

.btn-success:hover {
    background-color: var(--success-hover);
    box-shadow: 0 4px 15px var(--success-glow);
    transform: translateY(-1px);
}

.btn-danger {
    background-color: var(--danger-color);
    color: #ffffff;
}

.btn-danger:hover {
    background-color: var(--danger-hover);
    box-shadow: 0 4px 15px var(--danger-glow);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-card);
    color: var(--text-main);
}

.btn-outline:hover {
    background-color: var(--bg-table-row-even);
}

/* Glass Cards */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-card);
    padding: 24px;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    transition: background-color var(--transition-speed), transform var(--transition-speed);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-card);
    padding-bottom: 12px;
}

.card-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-icon {
    width: 24px;
    height: 24px;
}

/* Color codes */
.egg-color { color: var(--primary-color); }
.sales-color { color: var(--success-color); }
.weight-color { color: var(--info-color); }
.expense-color { color: var(--warning-color); }
.sim-color { color: var(--primary-color); }
.alert-color { color: var(--danger-color); }

/* Grid Layouts */
.grid-2-col {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 24px;
}

.grid-3-col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 24px;
}

.col-span-1 { grid-column: span 1; }
.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }

/* Form Controls */
.form-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.col-2 { grid-column: span 2; }
.col-4 { grid-column: span 4; }

.form-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
}

.form-control {
    background-color: var(--bg-input);
    border: 1px solid var(--border-input);
    color: var(--text-main);
    font-family: var(--font-family);
    font-size: 0.88rem;
    padding: 10px 14px;
    border-radius: var(--border-radius-md);
    outline: none;
    transition: all var(--transition-speed);
}

.form-control:focus {
    border-color: var(--primary-color);
    background-color: var(--bg-input-focus);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-control-readonly {
    background-color: var(--bg-table-row-even);
    font-weight: 700;
}

.form-divider {
    grid-column: span 4;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-card);
    padding-bottom: 4px;
    margin-top: 10px;
}

.btn-form-group {
    margin-top: 10px;
}

/* Badges */
.badge {
    display: inline-flex;
    padding: 4px 8px;
    border-radius: 30px;
    font-size: 0.72rem;
    font-weight: 700;
}

.badge-info { background-color: var(--info-glow); color: var(--info-color); }
.badge-success { background-color: var(--success-glow); color: var(--success-color); }
.badge-danger { background-color: var(--danger-glow); color: var(--danger-color); }
.badge-warning { background-color: rgba(234, 179, 8, 0.15); color: var(--warning-color); }

/* Tables */
.table-scroll-container {
    overflow-x: auto;
    max-height: 400px;
}

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

.data-table th {
    background-color: var(--bg-table-header);
    color: var(--text-main);
    padding: 14px 16px;
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 10;
}

.data-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-card);
    color: var(--text-main);
}

.data-table tbody tr:nth-child(even) {
    background-color: var(--bg-table-row-even);
}

.data-table tbody tr:hover {
    background-color: var(--bg-table-row-hover);
}

/* Tab Management */
.tab-panel {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.tab-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================
   TAB-SPECIFIC CUSTOM STYLES
   ========================================== */

/* Tab 1: Dashboard Overview */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.metric-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.metric-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}

.card-income::before { background-color: var(--success-color); }
.card-expense::before { background-color: var(--danger-color); }
.card-profit::before { background-color: var(--primary-color); }
.card-hen::before { background-color: var(--info-color); }

.card-body {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.metric-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.metric-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.metric-sub {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.metric-icon {
    font-size: 1.5rem;
    opacity: 0.8;
    background-color: var(--bg-table-row-even);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-income .metric-icon { color: var(--success-color); }
.card-expense .metric-icon { color: var(--danger-color); }
.card-profit .metric-icon { color: var(--primary-color); }
.card-hen .metric-icon { color: var(--info-color); }

.dashboard-charts-grid {
    display: grid;
    grid-template-columns: 2fr 1.1fr;
    gap: 24px;
    margin-bottom: 32px;
}

.chart-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-card);
}

.chart-header {
    margin-bottom: 20px;
}

.chart-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
}

.chart-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.chart-wrapper {
    position: relative;
    width: 100%;
    height: 300px;
}

.coop-status-section {
    background-color: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-card);
}

.section-header {
    margin-bottom: 20px;
}

.header-title {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}

.header-title i {
    color: var(--primary-color);
}

.section-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Tab 2: Egg Inventory List */
.inventory-status-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.inv-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background-color: var(--bg-table-row-even);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-card);
}

.inv-name {
    font-size: 0.85rem;
    font-weight: 500;
}

.inv-qty {
    font-size: 0.9rem;
    font-weight: 700;
}

/* Tab 3: Growth Evaluation guide */
.standard-guide-card {
    background-color: var(--bg-table-row-even);
    border: 1px solid var(--border-card);
    border-radius: var(--border-radius-md);
    padding: 16px;
    margin-top: 20px;
}

.standard-guide-card h4 {
    font-size: 0.85rem;
    margin-bottom: 10px;
}

.growth-evaluation {
    border-radius: var(--border-radius-sm);
    padding: 12px;
    text-align: center;
}

.eval-status {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.eval-desc {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.status-neutral { background-color: var(--border-card); color: var(--text-muted); }
.status-good { background-color: var(--success-glow); color: var(--success-color); }
.status-under { background-color: var(--info-glow); color: var(--info-color); }
.status-over { background-color: var(--danger-glow); color: var(--danger-color); }

/* Tab 5: Simulator Sliders & Diagrams */
.sim-sliders-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.slider-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.slider-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    font-weight: 600;
}

.slider-val {
    color: var(--primary-color);
}

.sim-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-table-header);
    outline: none;
    transition: background 0.3s;
}

.sim-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 0 10px var(--primary-glow);
    transition: transform 0.1s;
}

.sim-slider::-webkit-slider-thumb:hover {
    transform: scale(1.25);
}

.simulator-modes-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

.sim-mode-card {
    background-color: var(--bg-table-row-even);
    border: 1px solid var(--border-card);
    border-radius: var(--border-radius-md);
    padding: 20px;
}

.mode-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border-card);
    padding-bottom: 8px;
}

.mode-badge {
    background-color: var(--primary-glow);
    color: var(--primary-color);
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.72rem;
    font-weight: 700;
}

.mode-badge.bg-blue {
    background-color: var(--info-glow);
    color: var(--info-color);
}

.mode-header h4 {
    font-size: 0.95rem;
    font-weight: 700;
}

.mode-metrics {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.sim-metric {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
}

.sim-metric span {
    color: var(--text-muted);
}

.sim-metric strong {
    font-weight: 600;
}

.highlight-profit {
    border-top: 1px dashed var(--border-card);
    padding-top: 8px;
    margin-top: 4px;
}

.highlight-profit strong {
    font-size: 1.05rem;
    color: var(--success-color);
}

.rotation-simulation-card {
    background-color: var(--bg-table-row-even);
    border: 1px solid var(--border-card);
    border-radius: var(--border-radius-md);
    padding: 20px;
}

.card-header-sub {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.card-header-sub i {
    color: var(--primary-color);
}

.card-header-sub h4 {
    font-weight: 700;
}

.desc-text {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.rotation-projection-results {
    display: flex;
    justify-content: space-between;
    background-color: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--border-radius-md);
    padding: 16px;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.rot-metric {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.rot-metric span {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.rot-metric strong {
    font-size: 1.15rem;
    font-weight: 700;
}

.highlight-gold strong {
    color: var(--primary-color);
}

/* Rotation Timeline Visualization */
.rotation-diagram-timeline {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--border-card);
}

.timeline-row {
    display: flex;
    align-items: center;
    gap: 16px;
}

.timeline-coop-name {
    font-size: 0.78rem;
    font-weight: 600;
    width: 80px;
}

.timeline-bar-container {
    flex-grow: 1;
    height: 18px;
    background-color: var(--bg-card);
    border-radius: 10px;
    position: relative;
    overflow: hidden;
}

.timeline-segment {
    position: absolute;
    height: 100%;
    top: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 700;
    color: #ffffff;
    border-right: 1px solid var(--bg-card);
}

.segment-rearing { background-color: var(--info-color); }
.segment-laying { background-color: var(--success-color); }
.segment-cull { background-color: var(--danger-color); }

/* Tab 6: Incident Log Timeline */
.incident-timeline {
    display: flex;
    flex-direction: column;
    gap: 18px;
    padding-left: 20px;
    position: relative;
    max-height: 400px;
    overflow-y: auto;
}

.incident-timeline::before {
    content: "";
    position: absolute;
    top: 0;
    left: 7px;
    width: 2px;
    height: 100%;
    background-color: var(--timeline-line);
}

.incident-item {
    position: relative;
    background-color: var(--bg-table-row-even);
    border: 1px solid var(--border-card);
    border-radius: var(--border-radius-md);
    padding: 16px;
    margin-left: 10px;
}

.incident-item::before {
    content: "";
    position: absolute;
    top: 20px;
    left: -26px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: var(--bg-app);
    border: 3px solid var(--danger-color);
    z-index: 5;
}

.incident-item.inc-status-resolved::before {
    border-color: var(--success-color);
}

.incident-item.inc-status-monitoring::before {
    border-color: var(--warning-color);
}

.incident-item.inc-status-in_progress::before {
    border-color: var(--info-color);
}

.incident-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
    flex-wrap: wrap;
    gap: 8px;
}

.inc-title-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.inc-title {
    font-size: 0.9rem;
    font-weight: 700;
}

.inc-date-txt {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.inc-meta-row {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 0.75rem;
}

.inc-desc-txt {
    font-size: 0.82rem;
    line-height: 1.4;
    margin-bottom: 12px;
}

.inc-action-box {
    background-color: var(--bg-card);
    border-left: 3px solid var(--primary-color);
    padding: 8px 12px;
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
}

.inc-action-box h5 {
    font-size: 0.75rem;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.inc-action-box p {
    font-size: 0.8rem;
}

/* ==========================================
   MODAL DIALOG POPUP
   ========================================== */

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-backdrop.active {
    display: flex;
}

.modal-card {
    background-color: var(--bg-sidebar);
    border: 1px solid var(--border-card);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    width: 100%;
    max-width: 500px;
    padding: 24px;
    animation: modalSlide 0.3s ease-out;
}

@keyframes modalSlide {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-card);
    padding-bottom: 12px;
}

.btn-close-modal {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

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

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
    border-top: 1px solid var(--border-card);
    padding-top: 16px;
}

/* Scrollbar customization */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-scrollbar);
}

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

/* ==========================================
   RESPONSIVE DESIGN ADAPTATIONS (MOBILE)
   ========================================== */

@media (max-width: 1024px) {
    .dashboard-charts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid var(--border-card);
        padding: 16px;
    }
    
    .sidebar-header {
        margin-bottom: 16px;
    }
    
    .sidebar-menu {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 8px;
        gap: 6px;
    }
    
    .nav-item {
        padding: 10px 14px;
        font-size: 0.8rem;
        white-space: nowrap;
        transform: none !important;
    }
    
    .sidebar-footer {
        display: none; /* Hide footer settings in mobile sidebar, or simplify */
    }
    
    .main-content {
        margin-left: 0;
        padding: 16px;
    }
    
    .grid-2-col, .grid-3-col {
        grid-template-columns: 1fr;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .col-2, .col-4 {
        grid-column: span 1;
    }
    
    .form-divider {
        grid-column: span 1;
    }
    
    .simulator-modes-grid {
        grid-template-columns: 1fr;
    }
    
    .rot-metric {
        width: 100%;
        text-align: center;
        border-bottom: 1px solid var(--border-card);
        padding-bottom: 8px;
    }
    
    .rot-metric:last-child {
        border-bottom: none;
    }
}