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

:root {
    --primary-color: #4CAF50;
    --danger-color: #f44336;
    --warning-color: #ff9800;
    --info-color: #2196F3;
}

/* Dark theme (default) */
[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --card-bg: #2d2d2d;
    --text-color: #e0e0e0;
    --border-color: #404040;
}

/* Light theme */
[data-theme="light"] {
    --bg-color: #f5f5f5;
    --card-bg: #ffffff;
    --text-color: #333333;
    --border-color: #e0e0e0;
}

/* Default to dark theme */
body {
    background: var(--bg-color);
    color: var(--text-color);
}

html {
    background: var(--bg-color);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

body.modal-open {
    overflow: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 30px;
}

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

h1 {
    font-size: 2rem;
    color: var(--primary-color);
}

h2 {
    margin-bottom: 20px;
    color: var(--text-color);
    font-size: 1.5rem;
}

.server-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

#server-version {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--text-secondary);
    background: var(--border-color);
    padding: 2px 8px;
    border-radius: 10px;
    letter-spacing: 0.03em;
}

.status-badge {
    font-size: 1.5rem;
    animation: pulse 2s infinite;
}

.status-badge.online {
    color: var(--primary-color);
}

.status-badge.offline {
    color: var(--danger-color);
}

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

/* WLED device health indicator */
.health-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 8px;
    vertical-align: middle;
    flex-shrink: 0;
}

.health-dot.health-online {
    background-color: #4CAF50;
    box-shadow: 0 0 6px rgba(76, 175, 80, 0.6);
}

.health-dot.health-offline {
    background-color: var(--danger-color);
    box-shadow: 0 0 6px rgba(244, 67, 54, 0.6);
}

.health-dot.health-unknown {
    background-color: #9E9E9E;
    animation: pulse 2s infinite;
}

.health-latency {
    font-size: 0.7rem;
    font-weight: 400;
    color: #4CAF50;
    margin-left: auto;
    padding-left: 8px;
    opacity: 0.85;
}

.health-latency.offline {
    color: var(--danger-color);
}

section {
    margin-bottom: 40px;
}

.displays-grid,
.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.devices-grid > .loading {
    grid-column: 1 / -1;
}

.add-device-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 2px dashed var(--border-color);
    background: transparent;
    min-height: 160px;
    transition: border-color 0.2s, background 0.2s;
}

.add-device-card:hover {
    border-color: var(--primary-color);
    background: rgba(33, 150, 243, 0.05);
}

.add-device-icon {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--text-secondary);
    line-height: 1;
    transition: color 0.2s;
}

.add-device-card:hover .add-device-icon {
    color: var(--primary-color);
}

.add-device-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    position: relative;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.card-remove-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: none;
    border: none;
    color: #777;
    font-size: 1rem;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-radius: 4px;
    transition: color 0.2s, background 0.2s;
}

.card-remove-btn:hover {
    color: var(--danger-color);
    background: rgba(244, 67, 54, 0.1);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
    padding-right: 30px;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.card-subtitle {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.card-meta {
    font-size: 0.8rem;
    color: #999;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.channel-indicator {
    display: inline-flex;
    gap: 2px;
    align-items: center;
}

.channel-indicator .ch {
    width: 8px;
    height: 10px;
    border-radius: 1px;
}

.badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge.processing {
    background: var(--primary-color);
    color: white;
}

.badge.idle {
    background: var(--warning-color);
    color: white;
}

.badge.error {
    background: var(--danger-color);
    color: white;
}

.card-content {
    margin-bottom: 15px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    color: #999;
}

.info-value {
    font-weight: 600;
}

.card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: opacity 0.2s;
    flex: 1 1 auto;
    min-width: 100px;
}

.btn:hover {
    opacity: 0.9;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

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

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

.btn-icon {
    min-width: auto;
    padding: 8px 12px;
    font-size: 1.2rem;
    flex: 0 0 auto;
}

.btn-icon:hover {
    transform: scale(1.1);
    opacity: 1;
}

.display-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
}

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

.display-index {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--info-color);
}

.primary-star {
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* Tabs */
.tab-bar {
    display: flex;
    align-items: center;
    gap: 4px;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 16px;
}

.tab-btn {
    background: none;
    border: none;
    padding: 10px 18px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: color 0.2s, border-color 0.2s;
}

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

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-panel {
    display: none;
}

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

/* Display Layout Visualization */
.display-layout-preview {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.display-layout-preview h3 {
    margin: 0 0 15px 0;
    font-size: 1.1rem;
    color: var(--text-color);
}

.display-layout-canvas {
    background: var(--bg-color);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 30px;
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.layout-container {
    position: relative;
    background: transparent;
}

.layout-display {
    position: absolute;
    border: 3px solid;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: help;
}

.layout-display:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
    z-index: 10;
}

.layout-display.primary {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.15), rgba(76, 175, 80, 0.05));
}

.layout-display.secondary {
    border-color: var(--border-color);
    background: linear-gradient(135deg, rgba(128, 128, 128, 0.1), rgba(128, 128, 128, 0.05));
}

.layout-position-label {
    position: absolute;
    top: 4px;
    left: 6px;
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.layout-index-label {
    position: absolute;
    bottom: 6px;
    left: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-color);
    background: rgba(0, 0, 0, 0.4);
    padding: 1px 6px;
    border-radius: 4px;
    letter-spacing: 0.5px;
}

.layout-display-label {
    text-align: center;
    padding: 5px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.layout-display-label strong {
    font-size: 0.9rem;
    color: var(--text-color);
    font-weight: 600;
}

.layout-display-label small {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.primary-indicator {
    position: absolute;
    top: 2px;
    right: 4px;
    color: var(--primary-color);
    font-size: 1.5rem;
    line-height: 1;
    text-shadow: 0 0 4px rgba(0, 0, 0, 0.4);
}

.layout-legend {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.legend-dot {
    width: 16px;
    height: 16px;
    border-radius: 3px;
    border: 2px solid;
}

.legend-dot.primary {
    border-color: var(--primary-color);
    background: rgba(76, 175, 80, 0.2);
}

.legend-dot.secondary {
    border-color: var(--border-color);
    background: rgba(128, 128, 128, 0.2);
}

/* Card brightness slider */
.brightness-control {
    padding: 0;
    margin-bottom: 12px;
}

.brightness-slider {
    width: 100%;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.section-header h2 {
    margin-bottom: 0;
}

.section-tip {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin: 0 0 15px 0;
    line-height: 1.5;
    padding: 8px 12px;
    background: rgba(33, 150, 243, 0.08);
    border-left: 3px solid var(--info-color, #2196F3);
    border-radius: 0 6px 6px 0;
}

.section-tip a {
    color: var(--info-color, #2196F3);
    text-decoration: underline;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    color: #999;
    font-weight: 500;
}

input[type="text"],
input[type="url"],
input[type="number"],
input[type="password"],
select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    transition: border-color 0.2s, box-shadow 0.2s;
}

/* Better password field appearance */
input[type="password"] {
    letter-spacing: 0.15em;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.2);
}

/* Remove browser autofill styling */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus {
    -webkit-box-shadow: 0 0 0 1000px var(--bg-color) inset;
    -webkit-text-fill-color: var(--text-color);
    transition: background-color 5000s ease-in-out 0s;
}

.loading {
    text-align: center;
    padding: 40px;
    color: #999;
}

.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 4px;
    color: white;
    font-weight: 600;
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 1000;
}

.toast.show {
    opacity: 1;
}

.toast.success {
    background: var(--primary-color);
}

.toast.error {
    background: var(--danger-color);
}

.toast.info {
    background: var(--info-color);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 10px;
}

.metric {
    text-align: center;
    padding: 10px;
    background: var(--bg-color);
    border-radius: 4px;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.metric-label {
    font-size: 0.85rem;
    color: #999;
    margin-top: 5px;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    padding: 24px 24px 16px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--text-color);
}

.modal-body {
    padding: 24px;
}

.modal-description {
    color: #999;
    margin-bottom: 20px;
    line-height: 1.6;
}

.password-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input-wrapper input {
    flex: 1;
    padding-right: 45px;
}

.password-toggle {
    position: absolute;
    right: 8px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 8px;
    color: var(--text-color);
    opacity: 0.6;
    transition: opacity 0.2s;
}

.password-toggle:hover {
    opacity: 1;
}

.input-hint {
    display: block;
    margin-top: 8px;
    color: #666;
    font-size: 0.85rem;
}

.error-message {
    background: rgba(244, 67, 54, 0.1);
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
    padding: 12px;
    border-radius: 4px;
    margin-top: 15px;
    font-size: 0.9rem;
}

.modal-footer {
    padding: 16px 24px 24px 24px;
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.modal-footer .btn {
    min-width: 100px;
}

/* Theme Toggle */
.theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: transform 0.2s;
    margin-left: 10px;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

/* Footer */
.app-footer {
    margin-top: 60px;
    padding: 30px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-content {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-content p {
    margin: 0;
}


.footer-content strong {
    color: var(--text-color);
}

.footer-content a {
    color: var(--primary-color);
    text-decoration: none;
    transition: opacity 0.2s;
}

.footer-content a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* Interactive Calibration Preview Edges */
.calibration-preview {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    margin: 20px auto;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    overflow: visible;
}

#calibration-preview-canvas {
    position: absolute;
    top: -18px;
    left: -32px;
    width: calc(100% + 64px);
    height: calc(100% + 36px);
    pointer-events: none;
    z-index: 3;
}

.preview-screen {
    position: absolute;
    top: 37px;
    left: 57px;
    right: 57px;
    bottom: 37px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    color: white;
    font-size: 14px;
}

.preview-screen-total {
    font-size: 16px;
    font-weight: 600;
    opacity: 0.9;
    transition: color 0.2s;
}

.preview-screen-total.mismatch {
    color: #FFC107;
}

.preview-screen-controls {
    display: flex;
    align-items: center;
    gap: 6px;
}

.offset-control {
    display: flex;
    align-items: center;
    gap: 3px;
    padding: 4px 8px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    font-size: 12px;
    cursor: pointer;
    user-select: none;
}

.offset-control input {
    width: 36px;
    padding: 0;
    background: transparent;
    border: none;
    color: white;
    font-size: 12px;
    text-align: center;
    outline: none;
    -moz-appearance: textfield;
}

.offset-control input::-webkit-outer-spin-button,
.offset-control input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.preview-edge {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    color: var(--text-secondary);
    background: rgba(128, 128, 128, 0.15);
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s;
    z-index: 2;
    user-select: none;
}

.preview-edge:hover {
    background: rgba(128, 128, 128, 0.3);
}

.preview-edge.active {
    color: white;
    font-weight: 600;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.edge-top {
    top: 0;
    left: 56px;
    right: 56px;
    height: 36px;
    border-radius: 6px 6px 0 0;
    flex-direction: row;
    gap: 8px;
}

.edge-bottom {
    bottom: 0;
    left: 56px;
    right: 56px;
    height: 36px;
    border-radius: 0 0 6px 6px;
    flex-direction: row;
    gap: 8px;
}

.edge-left {
    left: 0;
    top: 36px;
    bottom: 36px;
    width: 56px;
    flex-direction: column;
    border-radius: 6px 0 0 6px;
    gap: 4px;
}

.edge-right {
    right: 0;
    top: 36px;
    bottom: 36px;
    width: 56px;
    flex-direction: column;
    border-radius: 0 6px 6px 0;
    gap: 4px;
}

.edge-led-input {
    width: 46px;
    padding: 2px 2px;
    font-size: 12px;
    box-sizing: border-box;
    max-height: 100%;
    text-align: center;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    color: inherit;
}

.edge-led-input:focus {
    border-color: var(--primary-color);
    outline: none;
}

.edge-top .edge-led-input,
.edge-bottom .edge-led-input {
    width: 56px;
}

/* Hide spinner arrows on edge inputs to save space */
.edge-led-input::-webkit-outer-spin-button,
.edge-led-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.edge-led-input[type=number] {
    -moz-appearance: textfield;
}

/* Edge span bars */
.edge-span-bar {
    position: absolute;
    background: rgba(76, 175, 80, 0.3);
    border: 1px solid rgba(76, 175, 80, 0.5);
    border-radius: 3px;
    cursor: grab;
    z-index: 1;
    transition: background 0.15s;
}

.edge-span-bar:hover {
    background: rgba(76, 175, 80, 0.45);
}

.edge-span-bar:active {
    cursor: grabbing;
}

/* Horizontal edges: bar spans left-right */
.edge-top .edge-span-bar,
.edge-bottom .edge-span-bar {
    top: 2px;
    bottom: 2px;
}

/* Vertical edges: bar spans top-bottom */
.edge-left .edge-span-bar,
.edge-right .edge-span-bar {
    left: 2px;
    right: 2px;
}

/* Resize handles */
.edge-span-handle {
    position: absolute;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(76, 175, 80, 0.7);
    border-radius: 2px;
    z-index: 2;
    opacity: 0;
    transition: opacity 0.15s;
}

.edge-span-bar:hover .edge-span-handle {
    opacity: 1;
}

/* Horizontal handles */
.edge-top .edge-span-handle,
.edge-bottom .edge-span-handle {
    top: 2px;
    bottom: 2px;
    width: 6px;
    cursor: ew-resize;
}

.edge-top .edge-span-handle-start,
.edge-bottom .edge-span-handle-start {
    left: 0;
}

.edge-top .edge-span-handle-end,
.edge-bottom .edge-span-handle-end {
    right: 0;
}

/* Vertical handles */
.edge-left .edge-span-handle,
.edge-right .edge-span-handle {
    left: 2px;
    right: 2px;
    height: 6px;
    cursor: ns-resize;
}

.edge-left .edge-span-handle-start,
.edge-right .edge-span-handle-start {
    top: 0;
}

.edge-left .edge-span-handle-end,
.edge-right .edge-span-handle-end {
    bottom: 0;
}

/* Ensure LED input is above span bar */
.edge-led-input {
    position: relative;
    z-index: 2;
}

/* Corner start-position buttons */
.preview-corner {
    position: absolute;
    width: 56px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    line-height: 1;
    color: rgba(128, 128, 128, 0.4);
    cursor: pointer;
    z-index: 5;
    transition: color 0.2s, transform 0.2s, text-shadow 0.2s;
    user-select: none;
}

.preview-corner:hover {
    color: rgba(76, 175, 80, 0.6);
    transform: scale(1.2);
}

.preview-corner.active:hover {
    transform: none;
}

.preview-corner.active {
    color: #4CAF50;
    text-shadow: 0 0 8px rgba(76, 175, 80, 0.6);
    font-size: 22px;
}

.corner-top-left { top: 0; left: 0; }
.corner-top-right { top: 0; right: 0; }
.corner-bottom-left { bottom: 0; left: 0; }
.corner-bottom-right { bottom: 0; right: 0; }

/* Direction toggle inside screen */
.direction-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    color: white;
    font-size: 12px;
    cursor: pointer;
    transition: background 0.2s;
    user-select: none;
}

.direction-toggle:hover {
    background: rgba(255, 255, 255, 0.25);
}

.direction-toggle #direction-icon {
    font-size: 16px;
}

.preview-hint {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

@media (max-width: 768px) {
    .displays-grid,
    .devices-grid {
        grid-template-columns: 1fr;
    }

    header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .modal-content {
        width: 95%;
        margin: 20px;
    }

    .modal-footer {
        flex-direction: column-reverse;
    }

    .modal-footer .btn {
        width: 100%;
    }
}