/* ==========================================================================
   BERNOULLI'S PRINCIPLE VIRTUAL PHYSICS LABORATORY - STYLESHEET
   ========================================================================== */

:root {
    --bg-dark: #090d16;
    --bg-panel: #111827;
    --bg-card: #1f2937;
    --bg-card-hover: #374151;
    --border-color: #374151;
    --border-highlight: #4b5563;
    
    --text-main: #f9fafb;
    --text-muted: #9ca3af;
    --text-dim: #6b7280;
    
    --accent-blue: #0ea5e9;
    --accent-blue-glow: rgba(14, 165, 233, 0.3);
    --accent-amber: #f59e0b;
    --accent-emerald: #10b981;
    --accent-rose: #f43f5e;
    --accent-purple: #8b5cf6;
    
    --fluid-water: #0ea5e9;
    --fluid-oil: #eab308;
    --fluid-air: #94a3b8;
    --fluid-custom: #a855f7;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;

    --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 25px rgba(14, 165, 233, 0.15);
}

/* Base Resets & Layout */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 16px;
    gap: 16px;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px 24px;
    box-shadow: var(--shadow-card);
    flex-wrap: wrap;
    gap: 16px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-badge {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #0284c7, #0369a1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    box-shadow: 0 0 15px rgba(14, 165, 233, 0.4);
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-main);
}

.subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
}

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

.mode-selector {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.mode-selector select {
    background-color: var(--bg-card);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s;
}

.mode-selector select:focus {
    border-color: var(--accent-blue);
}

/* Main Grid Layout */
.main-grid {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 16px;
    flex: 1;
}

/* Sidebar & Cards */
.sidebar-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.card {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 18px;
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.card-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-main);
}

.badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge.info { background: rgba(14, 165, 233, 0.15); color: #38bdf8; border: 1px solid rgba(14, 165, 233, 0.3); }
.badge.secondary { background: rgba(156, 163, 175, 0.15); color: #d1d5db; border: 1px solid rgba(156, 163, 175, 0.3); }
.badge.success { background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }

/* Fluid Presets Buttons */
.preset-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.preset-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-muted);
}

.preset-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-highlight);
    color: var(--text-main);
}

.preset-btn.active {
    background: rgba(14, 165, 233, 0.12);
    border-color: var(--accent-blue);
    color: var(--text-main);
    box-shadow: 0 0 10px rgba(14, 165, 233, 0.2);
}

.fluid-icon {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
}

.water-icon { background-color: var(--fluid-water); box-shadow: 0 0 6px var(--fluid-water); }
.oil-icon { background-color: var(--fluid-oil); box-shadow: 0 0 6px var(--fluid-oil); }
.air-icon { background-color: var(--fluid-air); box-shadow: 0 0 6px var(--fluid-air); }
.custom-icon { background-color: var(--fluid-custom); box-shadow: 0 0 6px var(--fluid-custom); }

.preset-name { font-weight: 600; font-size: 0.85rem; }
.preset-sub { font-size: 0.72rem; color: var(--text-dim); }

/* Controls Sliders */
.control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.control-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.control-label-row label {
    color: var(--text-muted);
    font-weight: 500;
}

.select-input {
    width: 100%;
    background-color: var(--bg-card);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.select-input:focus {
    border-color: var(--accent-blue);
}

.value-badge {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-blue);
    background: rgba(14, 165, 233, 0.1);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(14, 165, 233, 0.2);
}

.value-badge.throat-badge {
    color: var(--accent-amber);
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.2);
}

.value-badge.flow-badge {
    color: var(--accent-emerald);
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.2);
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: #2d3748;
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-blue);
    border: 2px solid #ffffff;
    box-shadow: 0 0 10px rgba(14, 165, 233, 0.5);
    cursor: pointer;
    transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

#slider-d2::-webkit-slider-thumb {
    background: var(--accent-amber);
    box-shadow: 0 0 10px rgba(245, 158, 11, 0.5);
}

#slider-q::-webkit-slider-thumb {
    background: var(--accent-emerald);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

.slider-ticks {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--text-dim);
    margin-top: -2px;
}

.warning-text {
    font-size: 0.75rem;
    color: var(--accent-rose);
    font-weight: 500;
    min-height: 18px;
    line-height: 18px;
    display: block;
}

.warning-text.hidden {
    visibility: hidden !important;
    display: block !important;
}

/* Toggles */
.toggles-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 6px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.toggle-control {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.toggle-control input {
    display: none;
}

.toggle-switch {
    width: 36px;
    height: 20px;
    background-color: #374151;
    border-radius: 10px;
    position: relative;
    transition: background-color 0.2s ease;
}

.toggle-switch::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background-color: #ffffff;
    border-radius: 50%;
    transition: transform 0.2s ease;
}

.toggle-control input:checked + .toggle-switch {
    background-color: var(--accent-blue);
}

.toggle-control input:checked + .toggle-switch::after {
    transform: translateX(16px);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--accent-blue);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: #0284c7;
    box-shadow: 0 0 12px rgba(14, 165, 233, 0.4);
}

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

.btn-secondary:hover {
    background-color: var(--bg-card-hover);
}

.btn-danger {
    background-color: rgba(244, 63, 94, 0.15);
    color: var(--accent-rose);
    border: 1px solid rgba(244, 63, 94, 0.3);
}

.btn-danger:hover {
    background-color: rgba(244, 63, 94, 0.3);
}

/* Experiment Viewport */
.experiment-viewport {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.apparatus-card {
    padding: 16px;
    background: linear-gradient(180deg, #111827 0%, #0b1120 100%);
    border: 1px solid var(--border-highlight);
    box-shadow: var(--shadow-glow);
}

.apparatus-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

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

.section-title h2 {
    font-size: 1.1rem;
    font-weight: 700;
}

.live-status {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--accent-emerald);
    background: rgba(16, 185, 129, 0.15);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid rgba(16, 185, 129, 0.3);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.apparatus-legend {
    display: flex;
    gap: 16px;
    font-size: 0.78rem;
    color: var(--text-muted);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.color-box {
    width: 10px;
    height: 10px;
    border-radius: 2px;
}

.sec-a { background-color: var(--accent-blue); }
.sec-b { background-color: var(--accent-amber); }
.sec-c { background-color: var(--accent-emerald); }

.canvas-container {
    width: 100%;
    height: 460px;
    min-height: 460px;
    background: #050811;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.08);
    overflow: hidden;
    position: relative;
}

#venturi-svg {
    width: 100%;
    height: 100%;
    display: block;
}

/* Readouts Grid (Gauges + Telemetry) */
.readouts-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.readout-card {
    padding: 14px;
    background: var(--bg-panel);
    border-left: 4px solid var(--accent-blue);
    min-height: 145px;
    overflow: hidden;
}

.inlet-card { border-left-color: var(--accent-blue); }
.throat-card { border-left-color: var(--accent-amber); }
.outlet-card { border-left-color: var(--accent-emerald); }
.mano-card { border-left-color: var(--accent-rose); }

.readout-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.section-tag {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.tag-inlet { color: var(--accent-blue); }
.tag-throat { color: var(--accent-amber); }
.tag-outlet { color: var(--accent-emerald); }
.tag-mano { color: var(--accent-rose); }

.tap-id {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dim);
}

.readout-body {
    display: flex;
    align-items: center;
    gap: 12px;
}

.gauge-container {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
}

.gauge-svg {
    width: 100%;
    height: 100%;
}

.gauge-bg {
    fill: #0d1322;
    stroke: var(--border-color);
    stroke-width: 3;
}

.gauge-needle {
    transform-origin: 60px 60px;
    transition: transform 0.1s cubic-bezier(0.4, 0, 0.2, 1);
}

.readout-metrics {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
    min-width: 0;
}

.metric {
    display: flex;
    align-items: baseline;
    gap: 6px;
    white-space: nowrap;
    overflow: hidden;
}

.m-label {
    font-size: 0.75rem;
    color: var(--text-dim);
    width: 75px;
    flex-shrink: 0;
}

.m-val {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: inline-block;
    max-width: 95px;
}

.m-val.highlight-throat {
    color: var(--accent-amber);
}

.m-val.highlight-mano {
    color: var(--accent-rose);
}

.m-val.sub-val {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.m-unit {
    font-size: 0.75rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

.metric-sub {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 2px;
    padding-top: 4px;
    border-top: 1px stroke var(--border-color);
}

/* Analytics Dual Row */
.analytics-dual-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* Contrast Bars */
.contrast-bars-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-top: 4px;
}

.bar-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.bar-name {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-muted);
}

.dual-bar-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.bar-wrap {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.bar-lbl {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
}

.bar-bg {
    height: 10px;
    background: #0d1322;
    border-radius: 5px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.bar-fill {
    height: 100%;
    border-radius: 5px;
    transition: width 0.2s ease;
}

.v-fill { background: linear-gradient(90deg, #0284c7, #38bdf8); }
.p-fill { background: linear-gradient(90deg, #059669, #34d399); }

.v-fill.throat-v { background: linear-gradient(90deg, #d97706, #fbbf24); }
.p-fill.throat-p { background: linear-gradient(90deg, #e11d48, #fb7185); }

/* Energy Stack Bar */
.energy-stack-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-top: 4px;
}

.energy-stack-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.sec-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    width: 80px;
    flex-shrink: 0;
}

.stack-bar {
    flex: 1;
    height: 22px;
    background: #0d1322;
    border-radius: 4px;
    overflow: hidden;
    display: flex;
    border: 1px solid var(--border-color);
    font-size: 0.68rem;
    font-weight: 600;
    color: #ffffff;
}

.stack-segment {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: width 0.2s ease;
    padding: 0 4px;
}

.p-segment { background: rgba(16, 185, 129, 0.75); }
.k-segment { background: rgba(245, 158, 11, 0.85); }

.total-energy-val {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    width: 80px;
    text-align: right;
    color: var(--accent-emerald);
}

.verification-status-banner {
    margin-top: 8px;
    padding: 10px 14px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 12px;
}

.verif-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent-emerald);
    color: #000000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1rem;
    flex-shrink: 0;
}

.verif-info h4 {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent-emerald);
}

.verif-info p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Continuous Profile Graphs */
.graphs-card {
    padding: 16px;
}

.graph-legend {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.75rem;
}

.legend-line {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
}

.legend-line::before {
    content: '';
    width: 14px;
    height: 3px;
    border-radius: 2px;
}

.pressure-line::before { background-color: var(--accent-emerald); }
.velocity-line::before { background-color: var(--accent-blue); }

.graph-hint {
    color: var(--text-dim);
    font-style: italic;
    margin-left: auto;
}

.canvas-graph-wrap {
    position: relative;
    width: 100%;
    background: #050811;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

#profile-graph {
    width: 100%;
    height: 220px;
    display: block;
}

.graph-tooltip {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(17, 24, 39, 0.95);
    border: 1px solid var(--accent-blue);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-main);
    box-shadow: var(--shadow-card);
    pointer-events: none;
    z-index: 10;
}

/* Flow Continuity Supporting Card */
.continuity-card {
    padding: 14px 18px;
}

.continuity-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr) 2fr;
    gap: 12px;
    align-items: center;
}

.cont-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 8px 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.cont-box.throat-cont {
    border-color: rgba(245, 158, 11, 0.4);
    background: rgba(245, 158, 11, 0.05);
}

.cont-lbl {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.cont-val {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--accent-emerald);
}

.cont-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent-emerald);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-md);
    padding: 10px 14px;
}

.badge-icon {
    font-weight: 800;
    font-size: 1rem;
}

/* Observation Table Card */
.table-actions {
    display: flex;
    gap: 8px;
}

.table-wrapper {
    overflow-x: auto;
    max-height: 280px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
    text-align: left;
}

th {
    background: var(--bg-card);
    color: var(--text-muted);
    font-weight: 600;
    padding: 10px 12px;
    position: sticky;
    top: 0;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border-color);
    font-family: var(--font-mono);
    color: var(--text-main);
    white-space: nowrap;
}

tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.02);
}

tr:hover {
    background-color: rgba(14, 165, 233, 0.05);
}

.empty-row td {
    text-align: center;
    color: var(--text-dim);
    font-family: var(--font-sans);
    font-style: italic;
    padding: 20px;
}

/* Guided Lab Procedure & Theory Cards Dual Layout */
.card-row-dual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.procedure-list {
    padding-left: 20px;
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.procedure-list li strong {
    color: var(--text-main);
}

.theory-content {
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.theory-content h4 {
    color: var(--accent-blue);
    font-size: 0.9rem;
    font-weight: 600;
}

.equation-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-family: var(--font-mono);
    color: var(--accent-emerald);
    text-align: center;
    font-size: 0.9rem;
    font-weight: 600;
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 16px;
    font-size: 0.8rem;
    color: var(--text-dim);
    border-top: 1px solid var(--border-color);
    margin-top: 8px;
}

/* Responsive Media Queries */
@media (max-width: 1200px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
    
    .analytics-dual-row,
    .card-row-dual {
        grid-template-columns: 1fr;
    }

    .continuity-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .cont-badge {
        grid-column: span 3;
    }
}

@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-right {
        width: 100%;
        justify-content: space-between;
    }

    .readouts-grid {
        grid-template-columns: 1fr;
    }

    .dual-bar-group {
        grid-template-columns: 1fr;
    }

    .continuity-grid {
        grid-template-columns: 1fr;
    }

    .cont-badge {
        grid-column: span 1;
    }

    .preset-buttons {
        grid-template-columns: 1fr 1fr;
    }
}

/* ==========================================================================
   BERNOULLI'S PRINCIPLE - LIGHT THEME SYSTEM OVERRIDES
   ========================================================================== */
html[data-theme="light"],
html:not(.dark):not([data-theme="dark"]) {
    --bg-dark: #f8fafc;
    --bg-panel: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --border-color: #e2e8f0;
    --border-highlight: #cbd5e1;
    
    --text-main: #0f172a;
    --text-muted: #475569;
    --text-dim: #64748b;
    
    --accent-blue: #0284c7;
    --accent-blue-glow: rgba(2, 132, 199, 0.15);
    --accent-amber: #d97706;
    --accent-emerald: #16a34a;
    --accent-rose: #dc2626;
    --accent-purple: #9333ea;

    --shadow-card: 0 4px 12px -2px rgba(15, 23, 42, 0.05);
    --shadow-glow: 0 0 20px rgba(2, 132, 199, 0.08);
}

html[data-theme="light"] body,
html:not(.dark):not([data-theme="dark"]) body {
    background-color: #f8fafc;
    color: #0f172a;
}

html[data-theme="light"] .card,
html:not(.dark):not([data-theme="dark"]) .card {
    background-color: #ffffff;
    border-color: #e2e8f0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(15, 23, 42, 0.03);
}

html[data-theme="light"] .card-header,
html:not(.dark):not([data-theme="dark"]) .card-header {
    border-bottom-color: #e2e8f0;
}

html[data-theme="light"] .apparatus-card,
html:not(.dark):not([data-theme="dark"]) .apparatus-card {
    background: #ffffff;
    border-color: #e2e8f0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(15, 23, 42, 0.03);
}

html[data-theme="light"] .canvas-container,
html:not(.dark):not([data-theme="dark"]) .canvas-container {
    background: #ffffff;
    border-color: #e2e8f0;
    box-shadow: inset 0 2px 4px rgba(15, 23, 42, 0.02);
}

html[data-theme="light"] .canvas-graph-wrap,
html:not(.dark):not([data-theme="dark"]) .canvas-graph-wrap {
    background: #f8fafc;
    border-color: #e2e8f0;
}

html[data-theme="light"] .readout-card,
html:not(.dark):not([data-theme="dark"]) .readout-card {
    background: #ffffff;
    border-color: #e2e8f0;
}

html[data-theme="light"] .gauge-bg,
html:not(.dark):not([data-theme="dark"]) .gauge-bg {
    fill: #f1f5f9;
    stroke: #cbd5e1;
}

html[data-theme="light"] .bar-bg,
html:not(.dark):not([data-theme="dark"]) .bar-bg {
    background: #e2e8f0;
    border-color: #cbd5e1;
}

html[data-theme="light"] .stack-bar,
html:not(.dark):not([data-theme="dark"]) .stack-bar {
    background: #e2e8f0;
    border-color: #cbd5e1;
}

html[data-theme="light"] .preset-btn,
html:not(.dark):not([data-theme="dark"]) .preset-btn {
    background: #ffffff;
    border-color: #e2e8f0;
    color: #475569;
}

html[data-theme="light"] .preset-btn:hover,
html:not(.dark):not([data-theme="dark"]) .preset-btn:hover {
    background: #f1f5f9;
    border-color: #cbd5e1;
    color: #0f172a;
}

html[data-theme="light"] .preset-btn.active,
html:not(.dark):not([data-theme="dark"]) .preset-btn.active {
    background: #e0f2fe;
    border-color: #0284c7;
    color: #0284c7;
}

html[data-theme="light"] .value-badge,
html:not(.dark):not([data-theme="dark"]) .value-badge {
    background: #e0f2fe;
    border-color: #bae6fd;
    color: #0369a1;
}

html[data-theme="light"] .value-badge.flow-badge,
html:not(.dark):not([data-theme="dark"]) .value-badge.flow-badge {
    background: #dcfce7;
    border-color: #bbf7d0;
    color: #15803d;
}

html[data-theme="light"] input[type="range"],
html:not(.dark):not([data-theme="dark"]) input[type="range"] {
    background: #e2e8f0;
}

html[data-theme="light"] .toggle-switch,
html:not(.dark):not([data-theme="dark"]) .toggle-switch {
    background-color: #cbd5e1;
}

html[data-theme="light"] .select-input,
html:not(.dark):not([data-theme="dark"]) .select-input {
    background-color: #ffffff;
    border-color: #cbd5e1;
    color: #0f172a;
}

html[data-theme="light"] .cont-box,
html:not(.dark):not([data-theme="dark"]) .cont-box {
    background: #f8fafc;
    border-color: #e2e8f0;
}

html[data-theme="light"] .cont-box.throat-cont,
html:not(.dark):not([data-theme="dark"]) .cont-box.throat-cont {
    background: #fef3c7;
    border-color: #fde68a;
}

html[data-theme="light"] .verification-status-banner,
html:not(.dark):not([data-theme="dark"]) .verification-status-banner {
    background: #f0fdf4;
    border-color: #bbf7d0;
}

html[data-theme="light"] .equation-box,
html:not(.dark):not([data-theme="dark"]) .equation-box {
    background: #f8fafc;
    border-color: #e2e8f0;
    color: #15803d;
}

html[data-theme="light"] .obs-table th,
html:not(.dark):not([data-theme="dark"]) .obs-table th {
    background-color: #f1f5f9;
    border-color: #e2e8f0;
    color: #475569;
}

html[data-theme="light"] .obs-table td,
html:not(.dark):not([data-theme="dark"]) .obs-table td {
    border-color: #e2e8f0;
    color: #334155;
}

html[data-theme="light"] .obs-table tr:hover,
html:not(.dark):not([data-theme="dark"]) .obs-table tr:hover {
    background-color: #f8fafc;
}

html[data-theme="light"] .graph-tooltip,
html:not(.dark):not([data-theme="dark"]) .graph-tooltip {
    background: #ffffff;
    border-color: #0284c7;
    color: #0f172a;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.1);
}