:root {
    color-scheme: dark;
    --background: #0a0a0c;
    --panel: rgba(17, 18, 22, 0.92);
    --panel-border: rgba(255, 255, 255, 0.11);
    --control: rgba(255, 255, 255, 0.07);
    --control-hover: rgba(255, 255, 255, 0.12);
    --text: #f4f4f5;
    --muted: #a1a1aa;
    --accent: #8bd5ff;
    --accent-strong: #55baf2;
    --danger: #ff8a8a;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
    box-sizing: border-box;
}

html,
body,
.app {
    width: 100%;
    height: 100%;
    margin: 0;
    overflow: hidden;
}

body {
    min-width: 20rem;
    background: var(--background);
    color: var(--text);
}

button,
select,
textarea,
input {
    font: inherit;
}

button,
select,
textarea,
input[type="range"] {
    accent-color: var(--accent-strong);
}

#scene {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
    cursor: grab;
    touch-action: none;
}

#scene:active {
    cursor: grabbing;
}

.toolbar {
    position: absolute;
    z-index: 2;
    top: 0;
    right: 22rem;
    left: 0;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.35rem 1.5rem;
    pointer-events: none;
}

.title,
.toolbar-actions {
    pointer-events: auto;
}

.title h1,
.panel-heading h2 {
    margin: 0;
    font-weight: 650;
    letter-spacing: -0.025em;
}

.title h1 {
    font-size: clamp(1.45rem, 2.4vw, 2rem);
}

.panel-heading h2 {
    font-size: 1.15rem;
}

.eyebrow {
    display: block;
    margin-bottom: 0.3rem;
    color: var(--accent);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.toolbar-actions,
.panel-actions,
.switch-list {
    display: flex;
    gap: 0.55rem;
}

.button,
.icon-button,
select,
textarea {
    border: 1px solid var(--panel-border);
    border-radius: 0.65rem;
    background: var(--control);
    color: var(--text);
}

.button,
.icon-button {
    cursor: pointer;
    transition: background-color 150ms ease, border-color 150ms ease, transform 150ms ease;
}

.button {
    min-height: 2.45rem;
    padding: 0.62rem 0.85rem;
    font-size: 0.82rem;
    font-weight: 650;
}

.button:hover,
.icon-button:hover {
    border-color: rgba(255, 255, 255, 0.24);
    background: var(--control-hover);
}

.button:active,
.icon-button:active {
    transform: translateY(1px);
}

.button-primary {
    border-color: rgba(139, 213, 255, 0.42);
    background: rgba(85, 186, 242, 0.2);
}

.button-quiet {
    color: var(--muted);
}

.panel-button,
.icon-button {
    display: none;
}

.controls {
    position: absolute;
    z-index: 3;
    top: 0;
    right: 0;
    width: 21rem;
    height: 100%;
    padding: 1.35rem 1.25rem 2rem;
    overflow-y: auto;
    background: var(--panel);
    border-left: 1px solid var(--panel-border);
    box-shadow: -1.5rem 0 4rem rgba(0, 0, 0, 0.22);
    backdrop-filter: blur(18px);
}

.panel-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.control-section {
    padding: 1rem 0;
    border-top: 1px solid var(--panel-border);
}

.control-grid {
    display: grid;
    gap: 0.95rem;
}

.control-label,
.range-control label {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.45rem;
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 650;
}

.range-control output {
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

select,
textarea {
    width: 100%;
    padding: 0.65rem 0.75rem;
    outline: none;
}

textarea {
    min-height: 4.5rem;
    resize: vertical;
    font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
    font-size: 0.76rem;
    line-height: 1.45;
}

textarea[readonly] {
    color: var(--muted);
}

input[type="range"] {
    width: 100%;
    margin: 0;
}

.help-text,
.error-text {
    margin: 0.45rem 0 0;
    font-size: 0.7rem;
    line-height: 1.45;
}

.help-text {
    color: var(--muted);
}

.error-text {
    min-height: 1em;
    color: var(--danger);
}

.switch-list {
    flex-wrap: wrap;
    margin-top: 1rem;
}

.switch {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    min-height: 2.25rem;
    padding: 0.45rem 0.65rem;
    border: 1px solid var(--panel-border);
    border-radius: 0.6rem;
    color: var(--muted);
    font-size: 0.76rem;
    cursor: pointer;
}

.switch:has(input:checked) {
    border-color: rgba(139, 213, 255, 0.35);
    color: var(--text);
    background: rgba(85, 186, 242, 0.1);
}

.switch input {
    margin: 0;
}

.panel-actions {
    flex-wrap: wrap;
    padding-top: 0.25rem;
}

.panel-actions .button {
    flex: 1 1 calc(50% - 0.3rem);
}

.panel-actions .button-quiet {
    flex-basis: 100%;
}

.status,
.instructions {
    position: absolute;
    z-index: 2;
    left: 1.5rem;
    color: var(--muted);
    font-size: 0.72rem;
    pointer-events: none;
}

.status {
    bottom: 2.6rem;
    display: flex;
    gap: 1rem;
}

.status strong {
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

.instructions {
    bottom: 0.8rem;
    margin: 0;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

@media (max-width: 760px) {
    .toolbar {
        right: 0;
        align-items: flex-start;
        padding: 1rem;
    }

    .desktop-action {
        display: none;
    }

    .panel-button,
    .icon-button {
        display: inline-grid;
        place-items: center;
    }

    .icon-button {
        width: 2.3rem;
        height: 2.3rem;
        padding: 0;
        font-size: 1.35rem;
    }

    .controls {
        top: auto;
        bottom: 0;
        width: 100%;
        height: min(82vh, 44rem);
        padding: 1.1rem 1rem calc(1.5rem + env(safe-area-inset-bottom));
        border-top: 1px solid var(--panel-border);
        border-left: 0;
        border-radius: 1rem 1rem 0 0;
        transform: translateY(calc(100% + 1rem));
        visibility: hidden;
        transition: transform 220ms ease, visibility 0s linear 220ms;
    }

    .controls.is-open {
        transform: translateY(0);
        visibility: visible;
        transition-delay: 0s;
    }

    .status {
        bottom: calc(1rem + env(safe-area-inset-bottom));
        left: 1rem;
    }

    .instructions {
        display: none;
    }
}

@media (max-width: 440px) {
    .toolbar {
        gap: 0.7rem;
    }

    .title .eyebrow {
        display: none;
    }

    .title h1 {
        font-size: 1.25rem;
    }

    .toolbar-actions {
        gap: 0.35rem;
    }

    .button {
        padding-right: 0.68rem;
        padding-left: 0.68rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}