/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Default (High Contrast) Colors */
    --bg-color: #ffffff;
    --text-color: #000000;
    --control-bg: #f5f5f5;
    --control-border: #cccccc;
    --highlight-color: #ff0000;
    --label-color: #666666;

    /* Sizing */
    --base-font-size: 1rem;
    --chart-scale: 1;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

/* Reverse Contrast Mode */
body.contrast-reverse {
    --bg-color: #000000;
    --text-color: #ffffff;
    --control-bg: #1a1a1a;
    --control-border: #444444;
    --label-color: #999999;
}

/* Low Contrast Mode */
body.contrast-low {
    --bg-color: #f0f0f0;
    --text-color: #555555;
    --control-bg: #e5e5e5;
    --control-border: #cccccc;
    --label-color: #888888;
}

/* Container */
.container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Controls Panel */
.controls {
    width: 320px;
    background-color: var(--control-bg);
    border-right: 1px solid var(--control-border);
    padding: 2rem;
    overflow-y: auto;
    transition: transform 0.3s ease;
    z-index: 100;
}

.controls.hidden {
    transform: translateX(-100%);
    position: absolute;
    left: 0;
}

.controls h1 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.control-group {
    margin-bottom: 1.5rem;
}

.control-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-color);
}

.control-group select,
.control-group input {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--control-border);
    border-radius: 4px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
}

.btn {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    border: 1px solid var(--control-border);
    border-radius: 4px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.btn:active {
    transform: scale(0.98);
}

.instructions {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--control-border);
}

.instructions h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.instructions ul {
    list-style: none;
    padding: 0;
}

.instructions li {
    padding: 0.5rem 0;
    color: var(--text-color);
}

.instructions strong {
    color: var(--text-color);
    font-weight: 600;
}

.instructions .note {
    margin-top: 1rem;
    padding: 1rem;
    background-color: var(--bg-color);
    border-left: 3px solid var(--highlight-color);
    font-size: 0.9rem;
    color: var(--label-color);
}

/* Chart Container */
.chart-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-color);
    padding: 2rem;
    overflow: auto;
}

.chart-container.fullscreen {
    padding: 4rem;
}

/* Chart */
.chart {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    transform: scale(var(--chart-scale));
    transition: transform 0.3s ease;
}

/* Chart Lines */
.chart-line {
    display: flex;
    align-items: center;
    gap: 1rem;
    opacity: 0.4;
    transition: opacity 0.3s ease;
}

.chart-line:hover,
.chart-line.active {
    opacity: 1;
}

.chart-line[data-highlight="true"] {
    opacity: 0.6;
}

.chart-line[data-highlight="true"]:hover,
.chart-line[data-highlight="true"].active {
    opacity: 1;
}

.line-content {
    display: flex;
    gap: 0.3em;
}

/* Letters */
.letter {
    font-family: 'Courier New', monospace;
    font-weight: bold;
    color: var(--text-color);
    user-select: none;
    letter-spacing: 0.1em;
}

/* Dynamic letter sizing based on line */
.chart-line[data-line="1"] .letter { font-size: 8rem; }
.chart-line[data-line="2"] .letter { font-size: 6rem; }
.chart-line[data-line="3"] .letter { font-size: 4.5rem; }
.chart-line[data-line="4"] .letter { font-size: 3.5rem; }
.chart-line[data-line="5"] .letter { font-size: 3rem; }
.chart-line[data-line="6"] .letter { font-size: 2.5rem; }
.chart-line[data-line="7"] .letter { font-size: 2rem; }
.chart-line[data-line="8"] .letter { font-size: 1.75rem; }
.chart-line[data-line="9"] .letter { font-size: 1.5rem; }
.chart-line[data-line="10"] .letter { font-size: 1.25rem; }

/* Acuity Labels */
.acuity-label {
    font-size: 1rem;
    color: var(--label-color);
    font-weight: 600;
    min-width: 4rem;
    text-align: right;
    user-select: none;
}

/* Help Overlay */
.help-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.9);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.help-overlay.visible {
    display: flex;
}

.help-content {
    background-color: var(--bg-color);
    color: var(--text-color);
    padding: 3rem;
    border-radius: 8px;
    max-width: 600px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.help-content h2 {
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

.help-content ul {
    list-style: none;
    padding: 0;
}

.help-content li {
    padding: 0.75rem 0;
    font-size: 1.2rem;
}

.help-content kbd {
    display: inline-block;
    padding: 0.3rem 0.6rem;
    background-color: var(--control-bg);
    border: 1px solid var(--control-border);
    border-radius: 4px;
    font-family: monospace;
    font-weight: 600;
    margin: 0 0.2rem;
}

.help-content p {
    margin-top: 2rem;
    text-align: center;
    color: var(--label-color);
    font-size: 1rem;
}

/* Fullscreen Mode */
body.fullscreen .controls {
    display: none;
}

body.fullscreen .chart-container {
    width: 100vw;
}

/* Responsive Design for Different Screen Sizes */

/* Large screens (TV, large monitors) */
@media (min-width: 1920px) {
    .chart-line[data-line="1"] .letter { font-size: 10rem; }
    .chart-line[data-line="2"] .letter { font-size: 8rem; }
    .chart-line[data-line="3"] .letter { font-size: 6rem; }
    .chart-line[data-line="4"] .letter { font-size: 5rem; }
    .chart-line[data-line="5"] .letter { font-size: 4rem; }
    .chart-line[data-line="6"] .letter { font-size: 3.5rem; }
    .chart-line[data-line="7"] .letter { font-size: 3rem; }
    .chart-line[data-line="8"] .letter { font-size: 2.5rem; }
    .chart-line[data-line="9"] .letter { font-size: 2rem; }
    .chart-line[data-line="10"] .letter { font-size: 1.75rem; }
}

/* Medium screens (laptops) */
@media (max-width: 1366px) {
    .chart-line[data-line="1"] .letter { font-size: 6rem; }
    .chart-line[data-line="2"] .letter { font-size: 5rem; }
    .chart-line[data-line="3"] .letter { font-size: 4rem; }
    .chart-line[data-line="4"] .letter { font-size: 3rem; }
    .chart-line[data-line="5"] .letter { font-size: 2.5rem; }
    .chart-line[data-line="6"] .letter { font-size: 2rem; }
    .chart-line[data-line="7"] .letter { font-size: 1.75rem; }
    .chart-line[data-line="8"] .letter { font-size: 1.5rem; }
    .chart-line[data-line="9"] .letter { font-size: 1.25rem; }
    .chart-line[data-line="10"] .letter { font-size: 1rem; }
}

/* Small screens (tablets) */
@media (max-width: 768px) {
    .controls {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--control-border);
    }

    .controls.hidden {
        transform: translateY(-100%);
    }

    .container {
        flex-direction: column;
    }

    .chart-container {
        padding: 1rem;
    }

    .chart {
        gap: 1rem;
    }

    .chart-line {
        flex-direction: column;
        gap: 0.5rem;
    }

    .acuity-label {
        text-align: center;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
    }

    .controls {
        display: none;
    }

    .help-overlay {
        display: none;
    }

    .chart-container {
        width: 100%;
        padding: 2rem;
    }

    .chart-line {
        opacity: 1 !important;
        page-break-inside: avoid;
    }

    .letter {
        color: black !important;
    }
}

/* Accessibility - High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --bg-color: #ffffff;
        --text-color: #000000;
        --control-border: #000000;
    }
}

/* Accessibility - Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

/* Focus Indicators for Keyboard Navigation */
button:focus,
select:focus,
input:focus {
    outline: 3px solid var(--highlight-color);
    outline-offset: 3px;
}

/* Enhanced focus for TV mode */
body.tv-mode button:focus,
body.tv-mode select:focus,
body.tv-mode input:focus,
body.tv-mode .preset-btn:focus {
    outline: 4px solid #FFD700;
    outline-offset: 4px;
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
    transform: scale(1.05);
    z-index: 10;
}

/* Active Line Highlight */
.chart-line.active {
    position: relative;
}

.chart-line.active::before {
    content: '►';
    position: absolute;
    left: -2rem;
    color: var(--highlight-color);
    font-size: 1.5rem;
}

/* Mode Info Section */
.mode-info {
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: var(--bg-color);
    border-radius: 4px;
    font-size: 0.85rem;
}

.mode-info p {
    margin: 0.5rem 0;
    color: var(--label-color);
}

.mode-info strong {
    color: var(--text-color);
}

/* Tumbling E Styles */
.tumbling-e {
    font-family: 'Courier New', monospace;
    font-weight: bold;
    color: var(--text-color);
    user-select: none;
    display: inline-block;
}

.tumbling-e.rotate-0 {
    transform: rotate(0deg);
}

.tumbling-e.rotate-90 {
    transform: rotate(90deg);
}

.tumbling-e.rotate-180 {
    transform: rotate(180deg);
}

.tumbling-e.rotate-270 {
    transform: rotate(270deg);
}

/* Landolt C Styles */
.landolt-c {
    display: inline-block;
    position: relative;
    border: 0.15em solid var(--text-color);
    border-radius: 50%;
    user-select: none;
}

/* Landolt C gap positions */
.landolt-c.gap-top {
    border-top-color: transparent;
}

.landolt-c.gap-bottom {
    border-bottom-color: transparent;
}

.landolt-c.gap-left {
    border-left-color: transparent;
}

.landolt-c.gap-right {
    border-right-color: transparent;
}

/* Landolt C sizes matching letter sizes */
.chart-line[data-line="1"] .landolt-c { width: 8rem; height: 8rem; }
.chart-line[data-line="2"] .landolt-c { width: 6rem; height: 6rem; }
.chart-line[data-line="3"] .landolt-c { width: 4.5rem; height: 4.5rem; }
.chart-line[data-line="4"] .landolt-c { width: 3.5rem; height: 3.5rem; }
.chart-line[data-line="5"] .landolt-c { width: 3rem; height: 3rem; }
.chart-line[data-line="6"] .landolt-c { width: 2.5rem; height: 2.5rem; }
.chart-line[data-line="7"] .landolt-c { width: 2rem; height: 2rem; }
.chart-line[data-line="8"] .landolt-c { width: 1.75rem; height: 1.75rem; }
.chart-line[data-line="9"] .landolt-c { width: 1.5rem; height: 1.5rem; }
.chart-line[data-line="10"] .landolt-c { width: 1.25rem; height: 1.25rem; }

/* Large screens - Landolt C */
@media (min-width: 1920px) {
    .chart-line[data-line="1"] .landolt-c { width: 10rem; height: 10rem; }
    .chart-line[data-line="2"] .landolt-c { width: 8rem; height: 8rem; }
    .chart-line[data-line="3"] .landolt-c { width: 6rem; height: 6rem; }
    .chart-line[data-line="4"] .landolt-c { width: 5rem; height: 5rem; }
    .chart-line[data-line="5"] .landolt-c { width: 4rem; height: 4rem; }
    .chart-line[data-line="6"] .landolt-c { width: 3.5rem; height: 3.5rem; }
    .chart-line[data-line="7"] .landolt-c { width: 3rem; height: 3rem; }
    .chart-line[data-line="8"] .landolt-c { width: 2.5rem; height: 2.5rem; }
    .chart-line[data-line="9"] .landolt-c { width: 2rem; height: 2rem; }
    .chart-line[data-line="10"] .landolt-c { width: 1.75rem; height: 1.75rem; }
}

/* Medium screens - Landolt C */
@media (max-width: 1366px) {
    .chart-line[data-line="1"] .landolt-c { width: 6rem; height: 6rem; }
    .chart-line[data-line="2"] .landolt-c { width: 5rem; height: 5rem; }
    .chart-line[data-line="3"] .landolt-c { width: 4rem; height: 4rem; }
    .chart-line[data-line="4"] .landolt-c { width: 3rem; height: 3rem; }
    .chart-line[data-line="5"] .landolt-c { width: 2.5rem; height: 2.5rem; }
    .chart-line[data-line="6"] .landolt-c { width: 2rem; height: 2rem; }
    .chart-line[data-line="7"] .landolt-c { width: 1.75rem; height: 1.75rem; }
    .chart-line[data-line="8"] .landolt-c { width: 1.5rem; height: 1.5rem; }
    .chart-line[data-line="9"] .landolt-c { width: 1.25rem; height: 1.25rem; }
    .chart-line[data-line="10"] .landolt-c { width: 1rem; height: 1rem; }
}

/* Number styles (inherits from letter) */
.number {
    font-family: 'Courier New', monospace;
    font-weight: bold;
    color: var(--text-color);
    user-select: none;
    letter-spacing: 0.1em;
}

/* Zoom Controls */
.zoom-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--control-border);
    border-radius: 4px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 2.5rem;
}

.btn-sm:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
}

.zoom-indicator {
    flex: 1;
    height: 0.5rem;
    background-color: var(--control-bg);
    border: 1px solid var(--control-border);
    border-radius: 4px;
    position: relative;
    overflow: hidden;
}

.zoom-bar {
    height: 100%;
    background: linear-gradient(90deg, #4CAF50, #8BC34A);
    transition: width 0.3s ease;
    border-radius: 3px;
}

#zoomLevel {
    color: var(--text-color);
    font-weight: 600;
    font-size: 1.1rem;
}

/* Preset Section */
.preset-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--control-border);
}

.preset-section h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.preset-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.preset-btn {
    padding: 0.75rem;
    border: 2px solid var(--control-border);
    border-radius: 6px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.preset-btn:hover {
    border-color: var(--text-color);
    background-color: var(--control-bg);
    transform: translateY(-1px);
}

.preset-btn.active {
    border-color: var(--highlight-color);
    background-color: var(--control-bg);
}

.preset-btn-name {
    flex: 1;
}

.preset-btn-shortcut {
    font-size: 0.75rem;
    opacity: 0.6;
    margin-left: 0.5rem;
}

.preset-actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.btn-secondary {
    width: 100%;
    padding: 0.6rem;
    border: 1px solid var(--control-border);
    border-radius: 4px;
    background-color: var(--control-bg);
    color: var(--text-color);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

/* Modal Overlays */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 1rem;
}

.modal-overlay.visible {
    display: flex;
}

.modal-content {
    background-color: var(--bg-color);
    color: var(--text-color);
    padding: 2rem;
    border-radius: 8px;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.modal-content h2 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
    color: var(--text-color);
}

.modal-content p {
    margin-bottom: 1rem;
    color: var(--label-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--control-border);
    border-radius: 4px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
}

.preset-preview {
    margin: 1.5rem 0;
    padding: 1rem;
    background-color: var(--control-bg);
    border-radius: 4px;
}

.preset-preview h4 {
    margin-bottom: 0.75rem;
    font-size: 1rem;
    color: var(--text-color);
}

.preset-preview ul {
    list-style: none;
    padding: 0;
}

.preset-preview li {
    padding: 0.4rem 0;
    color: var(--text-color);
    font-size: 0.9rem;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.modal-actions .btn,
.modal-actions .btn-secondary {
    flex: 1;
}

/* Presets List */
.presets-list {
    max-height: 400px;
    overflow-y: auto;
    margin-bottom: 1rem;
}

.preset-item {
    padding: 1rem;
    margin-bottom: 0.75rem;
    background-color: var(--control-bg);
    border: 1px solid var(--control-border);
    border-radius: 6px;
}

.preset-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.preset-item-name {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-color);
}

.preset-item-actions {
    display: flex;
    gap: 0.5rem;
}

.preset-item-actions button {
    padding: 0.3rem 0.6rem;
    border: 1px solid var(--control-border);
    border-radius: 4px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-item-actions button:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
}

.preset-item-actions .delete-btn:hover {
    background-color: #f44336;
    border-color: #f44336;
    color: white;
}

.preset-item-details {
    font-size: 0.85rem;
    color: var(--label-color);
}

.preset-item-details span {
    display: inline-block;
    margin-right: 1rem;
}

.empty-presets {
    text-align: center;
    padding: 2rem;
    color: var(--label-color);
}

/* Calibration Modal */
.calibration-content {
    max-width: 600px;
}

.calibration-steps {
    margin: 2rem 0;
}

.calibration-step {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: var(--control-bg);
    border-radius: 6px;
}

.calibration-step h3 {
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
    color: var(--text-color);
}

.calibration-step p {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.calibration-step .tip {
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: var(--bg-color);
    border-left: 3px solid var(--highlight-color);
    font-size: 0.9rem;
    color: var(--label-color);
}

.calibration-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.calibration-zoom-level {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    min-width: 4rem;
    text-align: center;
}

/* Responsive adjustments for modals */
@media (max-width: 768px) {
    .modal-content {
        padding: 1.5rem;
        max-width: 100%;
    }

    .modal-actions {
        flex-direction: column;
    }

    .modal-actions .btn,
    .modal-actions .btn-secondary {
        width: 100%;
    }

    .calibration-controls {
        flex-direction: column;
    }

    .preset-item-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

/* ========================================
   TV MODE STYLES
   ======================================== */

/* TV Mode Banner */
.tv-mode-banner {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 2rem;
    justify-content: space-between;
    align-items: center;
    z-index: 3000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

body.tv-mode .tv-mode-banner {
    display: flex;
}

.tv-mode-banner span {
    font-size: 1.2rem;
    font-weight: 600;
}

.btn-banner {
    padding: 0.5rem 1.5rem;
    border: 2px solid white;
    border-radius: 4px;
    background-color: rgba(255,255,255,0.2);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-banner:hover,
.btn-banner:focus {
    background-color: white;
    color: #667eea;
    transform: scale(1.05);
}

/* TV Mode Toggle Button */
.tv-mode-toggle {
    padding: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 8px;
    margin-bottom: 2rem;
}

.tv-mode-toggle .btn-primary {
    width: 100%;
    background-color: white;
    color: #667eea;
    font-weight: 700;
    font-size: 1.1rem;
    padding: 1rem;
}

.tv-mode-toggle .help-text {
    margin-top: 0.5rem;
    text-align: center;
    color: white;
    font-size: 0.9rem;
    opacity: 0.9;
}

/* TV Mode Layout Adjustments */
body.tv-mode {
    overflow: hidden;
}

body.tv-mode .container {
    padding-top: 4rem; /* Space for banner */
}

body.tv-mode .controls {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: auto;
    max-height: 40vh;
    background-color: rgba(var(--control-bg-rgb, 245, 245, 245), 0.98);
    border-top: 3px solid var(--highlight-color);
    border-right: none;
    padding: 1rem 2rem;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
}

body.tv-mode .controls.hidden {
    transform: translateY(100%);
}

body.tv-mode .controls-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    max-width: 1400px;
    margin: 0 auto;
}

body.tv-mode .controls h1 {
    grid-column: 1 / -1;
    text-align: center;
    margin-bottom: 0.5rem;
}

body.tv-mode .instructions {
    display: none; /* Hide verbose instructions in TV mode */
}

body.tv-mode .tv-mode-toggle {
    display: none; /* Hide toggle button when in TV mode */
}

body.tv-mode .chart-container {
    height: calc(100vh - 4rem); /* Account for banner */
    padding: 1rem;
    overflow: hidden;
}

body.tv-mode .chart {
    max-height: 100%;
    overflow: visible;
}

body.tv-mode .chart-line {
    margin: 0.5rem 0;
}

/* TV Mode - Simplified Preset Section */
body.tv-mode .preset-section {
    grid-column: 1 / -1;
}

body.tv-mode .preset-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.5rem;
}

body.tv-mode .preset-btn {
    font-size: 0.9rem;
    padding: 0.6rem;
}

/* TV Mode - Button Sizes */
body.tv-mode .btn,
body.tv-mode .btn-secondary,
body.tv-mode select {
    font-size: 1.1rem;
    padding: 0.8rem;
    min-height: 48px;
}

/* TV Mode - Modal Adjustments */
body.tv-mode .modal-content {
    max-width: 80vw;
    max-height: 70vh;
}

body.tv-mode .modal-content button,
body.tv-mode .modal-content select,
body.tv-mode .modal-content input {
    font-size: 1.2rem;
    padding: 1rem;
    min-height: 52px;
}

/* TV Mode - Hide scrollbars but keep functionality */
body.tv-mode .controls::-webkit-scrollbar {
    width: 8px;
}

body.tv-mode .controls::-webkit-scrollbar-track {
    background: transparent;
}

body.tv-mode .controls::-webkit-scrollbar-thumb {
    background: var(--highlight-color);
    border-radius: 4px;
}

/* TV Mode - Chart scaling to fit */
body.tv-mode.controls-hidden .chart-container {
    height: calc(100vh - 4rem);
}

body.tv-mode.fullscreen .chart-container {
    height: 100vh;
}

/* TV Mode Indicator */
body.tv-mode::before {
    content: '';
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2, #667eea);
    background-size: 200% 100%;
    animation: shimmer 3s linear infinite;
    z-index: 2999;
    pointer-events: none;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Focus trap for modals in TV mode */
body.tv-mode .modal-overlay.visible {
    z-index: 4000;
}

/* TV Mode - Larger hit areas */
body.tv-mode button,
body.tv-mode select,
body.tv-mode input,
body.tv-mode .preset-btn {
    cursor: pointer;
    position: relative;
}

/* TV Mode - Better visual feedback */
body.tv-mode button:active,
body.tv-mode .preset-btn:active {
    transform: scale(0.95);
    transition: transform 0.1s ease;
}

/* TV Mode - Help text visibility */
body.tv-mode .help-text {
    font-size: 0.95rem;
    line-height: 1.4;
}