.site-main--demo {
    max-width: 100%;
    padding: 0;
}

#demo-container {
    width: 100%;
    height: calc(100vh - var(--header-height));
    height: calc(100dvh - var(--header-height));
    min-height: 480px;
}

.demo-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    color: var(--muted);
}

.demo-container {
    width: 100%;
    height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
}

.demo-layout {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.demo-toolbar-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.5rem;
    background: transparent;
    flex-shrink: 0;
}

.demo-main {
    display: flex;
    flex: 1;
    overflow: hidden;
    min-height: 0;
}

.demo-scene-area {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}

.demo-canvas-row {
    display: flex;
    flex: 1;
    min-height: 0;
}

.demo-canvas {
    flex: 1;
    position: relative;
    min-height: 0;
    background: var(--bg);
}

.demo-canvas canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

.demo-insights-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: var(--panel);
    border-top: 1px solid var(--line);
    flex-shrink: 0;
    max-height: 220px;
    overflow-y: auto;
}

.demo-insights-container--right {
    justify-content: flex-end;
}

.demo-sidebar-container {
    width: 320px;
    min-width: 320px;
    background: var(--panel);
    border-left: 1px solid var(--line);
    overflow-y: auto;
    padding: 1rem;
    flex-shrink: 0;
}

.demo-toolbar {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.demo-toolbar__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid var(--line);
    color: var(--muted);
    cursor: pointer;
    transition: all 0.15s;
}

.demo-toolbar__btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.demo-toolbar__btn[data-active="true"] {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg);
}

.demo-toolbar__btn--primary {
    width: auto;
    padding: 0 1rem;
    font-weight: 600;
}

.demo-toolbar__btn--copied,
.demo-toolbar__btn--copied:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg);
}

.demo-toolbar__btn--failed,
.demo-toolbar__btn--failed:hover {
    border-color: var(--danger);
    color: var(--danger);
}

.demo-toolbar__btn svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.demo-toolbar__tau {
    font-size: 1.2rem;
    font-style: italic;
}

/* The transverse-sweep (tau) button gently pulses and glows to invite a try,
   whether the animation is currently on or off. */
@keyframes demo-patw-invite {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(111, 177, 255, 0);
        transform: scale(1);
    }
    50% {
        box-shadow: 0 0 11px 1px rgba(111, 177, 255, 0.55);
        transform: scale(1.07);
    }
}

#btnPatw {
    animation: demo-patw-invite 2.4s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
    #btnPatw {
        animation: none;
    }
}

.demo-toolbar__separator {
    width: 24px;
    height: 1px;
    background: var(--line);
    margin: 0.25rem 0;
}

.demo-presets {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--line);
}

.demo-presets__label {
    font-size: 0.75rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.demo-presets__select {
    background: var(--panel);
    border: 1px solid var(--line);
    color: var(--text);
    padding: 0.4rem 0.6rem;
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
}

.demo-presets__select:hover {
    border-color: var(--accent);
}

.demo-section {
    margin-bottom: 1rem;
}

.demo-section__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    cursor: pointer;
    border-bottom: 1px solid var(--line);
}

.demo-section__header h4 {
    margin: 0;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
}

.demo-section__toggle {
    font-size: 0.7rem;
    color: var(--muted);
}

.demo-section__content {
    padding: 0.75rem 0;
}

.demo-section__content.collapsed {
    display: none;
}

.demo-ctrl {
    margin-bottom: 0.75rem;
}

.demo-ctrl label {
    display: block;
    font-size: 0.75rem;
    color: var(--muted);
    margin-bottom: 0.25rem;
}

.demo-ctrl__row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.demo-ctrl__row input[type="range"] {
    flex: 1;
    height: 4px;
    background: var(--line);
    appearance: none;
    cursor: pointer;
}

.demo-ctrl__row input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent);
    cursor: pointer;
}

.demo-ctrl__row input[type="range"]:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.demo-ctrl__row input[type="range"]:disabled::-webkit-slider-thumb {
    cursor: not-allowed;
}

.demo-ctrl__row input[type="number"],
.demo-ctrl input[type="number"] {
    width: 80px;
    background: var(--panel);
    border: 1px solid var(--line);
    color: var(--text);
    padding: 0.35rem 0.5rem;
    font-family: inherit;
    font-size: 0.85rem;
    text-align: right;
}

.demo-ctrl__row input[type="number"]:focus,
.demo-ctrl input[type="number"]:focus {
    border-color: var(--accent);
    outline: none;
}

.demo-ctrl--row {
    display: flex;
    gap: 1rem;
}

.demo-ctrl__item {
    flex: 1;
    min-width: 80px;
}

.demo-ctrl__item input[type="number"] {
    width: 100%;
    min-width: 70px;
}

/* -/+ stepper around slider-less number inputs (n, k, omega, xi) */
.demo-stepper {
    display: flex;
    align-items: stretch;
}

.demo-stepper input[type="number"] {
    flex: 1;
    width: auto;
    min-width: 0;
    border-radius: 0;
    text-align: center;
    padding-left: 0.3rem;
    padding-right: 0.3rem;
    -moz-appearance: textfield;
    appearance: textfield;
}

/* Hide native spin buttons - the stepper's -/+ buttons replace them */
.demo-stepper input[type="number"]::-webkit-outer-spin-button,
.demo-stepper input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.demo-stepper__btn {
    flex: 0 0 auto;
    width: 34px;
    background: transparent;
    border: 1px solid var(--line);
    color: var(--muted);
    font-family: inherit;
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    user-select: none;
    touch-action: manipulation;
}

.demo-stepper__btn:hover { border-color: var(--accent); color: var(--accent); }
.demo-stepper__btn:active { background: var(--accent); color: var(--bg); }
.demo-stepper__btn--minus { border-radius: 3px 0 0 3px; border-right: none; }
.demo-stepper__btn--plus { border-radius: 0 3px 3px 0; border-left: none; }

/* Stepper sharing a row with a slider: keep the slider flexible, stepper compact */
.demo-ctrl__row .demo-stepper {
    flex: 0 0 auto;
}
.demo-ctrl__row .demo-stepper input[type="number"] {
    flex: 0 0 auto;
    width: 4.6rem;
}

.demo-ctrl--ah {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

/* Links the a and h amplitudes - chain icon, accent-lit when active */
.demo-ah-lock {
    flex-shrink: 0;
    align-self: center;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid var(--line);
    border-radius: var(--r-sm);
    color: var(--muted);
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.demo-ah-lock svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.demo-ah-lock:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.demo-ah-lock.locked {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(111, 177, 255, 0.12);
}

.demo-btn {
    background: transparent;
    border: 1px solid var(--line);
    color: var(--text);
    padding: 0.4rem 0.8rem;
    font-family: inherit;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.15s;
}

.demo-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.demo-btn--small {
    padding: 0.2rem 0.5rem;
    font-size: 0.75rem;
}

.demo-btn--toggle[aria-pressed="true"] {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg);
}

.demo-ctrl__toggle-group {
    display: flex;
}

.demo-ctrl__toggle-btn {
    flex: 1;
    background: transparent;
    border: 1px solid var(--line);
    color: var(--muted);
    padding: 0.35rem 0.6rem;
    font-family: inherit;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.15s;
}

.demo-ctrl__toggle-btn:not(:first-child) {
    border-left: none;
}

.demo-ctrl__toggle-btn:hover {
    color: var(--text);
    border-color: var(--accent);
}

.demo-ctrl__toggle-btn:hover + .demo-ctrl__toggle-btn {
    border-left-color: var(--accent);
}

.demo-ctrl__toggle-btn[data-active="true"] {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg);
}

.demo-ctrl__toggle-btn[data-active="true"] + .demo-ctrl__toggle-btn {
    border-left-color: var(--accent);
}

.demo-insights {
    display: flex;
    flex-wrap: nowrap;
    justify-content: space-between;
    gap: 1.5rem;
}

.demo-insights__group {
    min-width: 150px;
}

.demo-insights__title {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    margin: 0;
}

.demo-insights__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    width: 100%;
    border-bottom: 1px solid var(--line);
    padding-bottom: 0.25rem;
    margin-bottom: 0.25rem;
}

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

.demo-insights__meter {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.6rem;
    white-space: nowrap;
}

.demo-insights__meter + .demo-insights__meter::before {
    content: "";
    display: block;
    width: 1px;
    height: 0.6rem;
    background: var(--line);
    margin-right: 0.75rem;
}

.demo-insights__meter .demo-insights__label {
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.demo-insights__meter .demo-insights__value {
    color: var(--fg);
    font-family: var(--font-mono);
    min-width: 2.5rem;
}

.demo-insights__indicator {
    width: 8px;
    height: 8px;
    border: 1px solid var(--line);
    background: transparent;
    transition: background 0.1s;
}

.demo-insights__indicator.active {
    background: var(--accent);
    border-color: var(--accent);
}

.demo-insights__row {
    gap: 1rem;
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    padding: 0.1rem 0;
}

.demo-insights__label {
    color: var(--muted);
}

.demo-insights__value {
    color: var(--accent);
    font-weight: 500;
}


.demo-insights__indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--line);
    transition: background 0.1s, box-shadow 0.1s;
}

.demo-insights__indicator--active {
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent), 0 0 16px var(--accent);
}

.demo-insights__bar-container {
    flex: 1;
    height: 4px;
    background: var(--line);
    min-width: 60px;
}

.demo-insights__bar {
    height: 100%;
    background: var(--accent);
    transition: width 0.05s;
}

.demo-insights__bar--bright {
    background: #f0c040;
}
.demo-insights__group--controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    align-items: center;
    flex: 1;
}

.demo-insights__title {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0;
    width: 100%;
}

.demo-insights__freq-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-left: 0.5rem;
    border-left: 1px solid var(--line);
}

.demo-insights__freq-label {
    color: var(--muted);
    font-size: 0.7rem;
}

.demo-insights__freq-row input[type="checkbox"] {
    margin: 0;
}


.demo-ah__inputs {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.demo-fallback {
    max-width: 960px;
    margin: 0 auto;
    padding: var(--space-lg) var(--space-md);
}

.demo-fallback__notice {
    background: rgba(111, 177, 255, 0.1);
    border: 1px solid var(--accent);
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
    text-align: center;
}

.demo-fallback__notice p {
    margin: 0;
}

.demo-fallback__notice p + p {
    margin-top: var(--space-xs);
}

.demo-fallback__figure {
    margin: var(--space-lg) 0;
    text-align: center;
}

.demo-fallback__figure img {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--border);
}

.demo-fallback__figure figcaption {
    margin-top: var(--space-sm);
    color: var(--muted);
    font-size: 0.875rem;
}

.demo-fallback__params {
    margin: var(--space-lg) 0;
}

.demo-fallback__params h3 {
    color: var(--accent);
    margin: var(--space-md) 0 var(--space-sm);
    font-size: 1rem;
}

.demo-fallback__params dl {
    margin: 0;
}

.demo-fallback__params dt {
    font-weight: 500;
    margin-top: var(--space-sm);
}

.demo-fallback__params dd {
    margin: var(--space-xs) 0 0 0;
    color: var(--muted);
}

.demo-fallback__cta {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
    text-align: center;
}

.demo-fallback__cta p {
    margin-bottom: var(--space-md);
}

/* ---------------------------------------------------------------------------
 * Responsive: phone (<768px) - single-column, in-flow layout
 *   - Scene becomes a full-width square
 *   - Toolbar is a horizontal strip below the scene
 *   - Controls flow as a normal block below the toolbar (no drawer, no dock)
 *   - Dashboard hidden by default (toggle in toolbar)
 * --------------------------------------------------------------------------- */

@media (max-width: 767px) {
    /* Demo flows vertically; demo-main scrolls if content exceeds the viewport */
    .demo-main {
        flex-direction: column;
        overflow-y: auto;
        overflow-x: hidden;
    }
    .demo-scene-area,
    .demo-sidebar-container {
        flex: 0 0 auto;
    }
    .demo-canvas-row {
        flex: 0 0 auto;
        flex-direction: column;
    }
    /* Portrait: scene takes the full viewport width as a square */
    .demo-canvas {
        flex: 0 0 auto;
        width: 100%;
        aspect-ratio: 1 / 1;
    }
    .demo-toolbar-container {
        flex: 0 0 auto;
        flex-direction: row;
        justify-content: center;
        padding: 0.4rem;
    }
    .demo-toolbar {
        flex-direction: row;
        flex-wrap: nowrap;
        justify-content: center;
        width: 100%;
        gap: 0.35rem;
    }
    /* Buttons share the row and shrink to fit rather than wrapping */
    .demo-toolbar__btn {
        flex: 1 1 0;
        width: auto;
        min-width: 0;
        max-width: 44px;
    }
    .demo-toolbar__btn--primary {
        padding: 0;
    }
    .demo-toolbar__separator {
        flex: 0 0 1px;
        width: 1px;
        height: 22px;
        margin: 0 0.15rem;
    }
    #btnFullscreen {
        display: none;
    }

    /* Controls flow as a normal block below the toolbar */
    .demo-sidebar-container {
        width: 100%;
        min-width: 0;
        border-left: none;
        border-top: 1px solid var(--line);
    }

    /* Dashboard (hidden by default) flows in below when toggled on */
    .demo-insights-container {
        justify-content: flex-start;
        max-height: none;
        padding: 0.4rem 0.6rem;
        font-size: 0.7rem;
    }
    .demo-insights {
        width: 100%;
        flex-direction: column;
        gap: 0.35rem;
    }
    .demo-insights__group {
        min-width: 0;
    }
    .demo-insights__title {
        font-size: 0.55rem;
    }
    .demo-insights__row {
        font-size: 0.7rem;
        padding: 0.05rem 0;
    }
}

/* ---------------------------------------------------------------------------
 * Touch devices: bigger hit areas
 * --------------------------------------------------------------------------- */

@media (pointer: coarse) {
    .demo-ctrl__row input[type="range"] {
        height: 8px;
    }
    .demo-ctrl__row input[type="range"]::-webkit-slider-thumb {
        width: 24px;
        height: 24px;
    }
    .demo-ctrl__row input[type="range"]::-moz-range-thumb {
        width: 24px;
        height: 24px;
        border: none;
        background: var(--accent);
    }
    .demo-ctrl__row input[type="number"],
    .demo-ctrl input[type="number"] {
        padding: 0.55rem 0.6rem;
        font-size: 1rem;
    }
    .demo-toolbar__btn {
        width: 44px;
        height: 44px;
    }
    .demo-btn {
        padding: 0.55rem 0.9rem;
        font-size: 0.9rem;
    }
}