/* ==========================================================================
   CONTINUOUS//LIFE — glitch-core shell
   The canvas is the star; everything else hums quietly around it.
   ========================================================================== */

:root {
    --bg: #060609;
    --panel: rgba(9, 9, 13, 0.86);
    --panel-solid: #0b0b10;
    --line: #23222b;
    --line-hot: #3a3846;
    --ink: #ece9e4;
    --dim: #8c8899;
    --faint: #57546a;
    --acid: #d4ff00;
    --hot: #ff2bd6;
    --cold: #00e5ff;
    --pal-0: #ff48b0;
    --pal-1: #0078bf;
    --pal-2: #ffe800;
    --pal-bg: #f2ead8;
    --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
    --pixel: 'Silkscreen', var(--mono);
    --notch: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 7px 100%, 0 calc(100% - 7px));
    color-scheme: dark;
}

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

html, body {
    height: 100%;
}

body {
    font-family: var(--mono);
    font-size: 13px;
    background: var(--bg);
    color: var(--ink);
    line-height: 1.45;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
}

button, input, label.btn {
    font: inherit;
    color: inherit;
}

.visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

::selection {
    background: var(--acid);
    color: #000;
}

:focus-visible {
    outline: 1px solid var(--acid);
    outline-offset: 2px;
}

/* ---------- ambient life ------------------------------------------------- */

#ambient {
    position: fixed;
    inset: 0;
    z-index: 0;
    opacity: 0.2;
    pointer-events: none;
    /* fade out toward the canvas so the background never competes with it */
    -webkit-mask-image: radial-gradient(ellipse 60% 70% at 40% 52%, transparent 30%, #000 85%);
            mask-image: radial-gradient(ellipse 60% 70% at 40% 52%, transparent 30%, #000 85%);
}

/* ---------- layout ------------------------------------------------------- */

.app {
    position: relative;
    z-index: 1;
    height: 100vh;
    height: 100dvh;
    display: grid;
    grid-template-rows: auto 1fr;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 20px;
    border-bottom: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(6, 6, 9, 0.92), rgba(6, 6, 9, 0.6));
    backdrop-filter: blur(6px);
    flex-wrap: wrap;
}

.brand {
    display: flex;
    align-items: baseline;
    gap: 14px;
    min-width: 0;
}

.brand h1 {
    font-family: var(--pixel);
    font-weight: 400;
    font-size: 22px;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.brand-tag {
    color: var(--faint);
    font-size: 11px;
    letter-spacing: 0.08em;
    white-space: nowrap;
}

.layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 372px;
    min-height: 0;
}

/* ---------- glitch text --------------------------------------------------- */

.glitch {
    position: relative;
    display: inline-block;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0;
}

.glitch::before {
    color: var(--hot);
    animation: glitch-a 7s infinite steps(1);
}

.glitch::after {
    color: var(--cold);
    animation: glitch-b 7s infinite steps(1);
}

@keyframes glitch-a {
    0%, 91%, 100% { opacity: 0; transform: none; clip-path: none; }
    92% { opacity: 0.9; transform: translate(-3px, 1px); clip-path: inset(10% 0 55% 0); }
    94% { opacity: 0.9; transform: translate(4px, -1px); clip-path: inset(60% 0 8% 0); }
    96% { opacity: 0.9; transform: translate(-2px, 0); clip-path: inset(35% 0 40% 0); }
}

@keyframes glitch-b {
    0%, 91%, 100% { opacity: 0; transform: none; clip-path: none; }
    92.5% { opacity: 0.9; transform: translate(3px, -1px); clip-path: inset(50% 0 20% 0); }
    94.5% { opacity: 0.9; transform: translate(-4px, 1px); clip-path: inset(5% 0 70% 0); }
    96.5% { opacity: 0.9; transform: translate(2px, 1px); clip-path: inset(70% 0 5% 0); }
}

/* ---------- transport ---------------------------------------------------- */

.transport {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.tbtn,
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 7px 12px;
    background: transparent;
    border: 1px solid var(--line-hot);
    color: var(--ink);
    cursor: pointer;
    text-transform: lowercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
    clip-path: var(--notch);
    transition: background 120ms, color 120ms, border-color 120ms;
}

.tbtn:hover,
.btn:hover {
    background: var(--ink);
    color: #000;
    border-color: var(--ink);
    text-shadow: -1px 0 var(--hot), 1px 0 var(--cold);
}

.tbtn:active,
.btn:active {
    transform: translate(1px, 1px);
}

.tbtn-primary {
    min-width: 92px;
    border-color: var(--acid);
    color: var(--acid);
}

.tbtn-primary:hover {
    background: var(--acid);
    border-color: var(--acid);
}

.speed {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 6px;
}

.speed-label {
    color: var(--dim);
}

.speed input[type="range"] {
    width: 130px;
}

.speed .knob-value {
    min-width: 46px;
}

/* ---------- stage -------------------------------------------------------- */

.stage {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 28px 28px 18px;
    min-width: 0;
    min-height: 0;
}

.frame {
    position: relative;
    display: flex;
    padding: 10px;
}

#glCanvas {
    display: block;
    background: #000;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.06),
        0 30px 80px -20px rgba(0, 0, 0, 0.9);
}

.corner {
    position: absolute;
    width: 16px;
    height: 16px;
    border-color: var(--acid);
    border-style: solid;
    border-width: 0;
    opacity: 0.85;
    transition: opacity 200ms;
}

.corner.tl { top: 0; left: 0; border-top-width: 2px; border-left-width: 2px; }
.corner.tr { top: 0; right: 0; border-top-width: 2px; border-right-width: 2px; }
.corner.bl { bottom: 0; left: 0; border-bottom-width: 2px; border-left-width: 2px; }
.corner.br { bottom: 0; right: 0; border-bottom-width: 2px; border-right-width: 2px; }

.live-tag {
    position: absolute;
    top: -9px;
    left: 26px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0 6px;
    background: var(--bg);
    font-family: var(--pixel);
    font-size: 10px;
    letter-spacing: 0.1em;
    color: var(--acid);
    text-transform: uppercase;
}

.live-tag i {
    width: 6px;
    height: 6px;
    background: var(--acid);
    animation: blink 1.2s steps(1) infinite;
}

.live-tag .paused-text { display: none; }
body.paused .live-tag { color: var(--hot); }
body.paused .live-tag i { background: var(--hot); animation: none; }
body.paused .live-tag .live-text { display: none; }
body.paused .live-tag .paused-text { display: inline; }
body.paused .corner { border-color: var(--hot); }

@keyframes blink {
    50% { opacity: 0; }
}

.hud {
    font-size: 11px;
    color: var(--dim);
    letter-spacing: 0.06em;
    white-space: pre;
}

.keys {
    position: absolute;
    bottom: 14px;
    right: 22px;
    display: flex;
    gap: 14px;
    color: var(--faint);
    font-size: 10px;
}

kbd {
    font-family: var(--mono);
    font-size: 10px;
    padding: 0 4px;
    border: 1px solid var(--line-hot);
    color: var(--dim);
}

/* glitch burst: restart / new image / snapshot / mutate */
body.glitching .frame {
    animation: frame-glitch 380ms steps(2) 1;
}

body.glitching #glCanvas {
    animation: canvas-glitch 380ms steps(3) 1;
}

@keyframes frame-glitch {
    0% { transform: translate(0, 0); }
    20% { transform: translate(-4px, 2px) skewX(-2deg); }
    40% { transform: translate(5px, -1px); }
    60% { transform: translate(-2px, 0) skewX(1deg); }
    80% { transform: translate(2px, 1px); }
    100% { transform: none; }
}

@keyframes canvas-glitch {
    0% { filter: none; clip-path: inset(0); }
    25% { filter: hue-rotate(90deg) saturate(2); clip-path: inset(12% 0 40% 0); }
    50% { filter: invert(1); clip-path: inset(55% 0 10% 0); }
    75% { filter: hue-rotate(-60deg) contrast(1.6); clip-path: inset(0 0 0 0); }
    100% { filter: none; clip-path: inset(0); }
}

/* ---------- panel -------------------------------------------------------- */

.panel {
    position: relative;
    min-height: 0;
    background: var(--panel);
    border-left: 1px solid var(--line);
    backdrop-filter: blur(10px);
}

/* faint scanlines on the chrome only, never on the canvas */
.panel::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.018) 0 1px, transparent 1px 3px);
}

.controls-container {
    position: relative;
    z-index: 1;
    height: 100%;
    overflow-y: auto;
    padding: 16px 16px 40px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    scrollbar-width: thin;
    scrollbar-color: var(--line-hot) transparent;
}

.controls-container::-webkit-scrollbar { width: 6px; }
.controls-container::-webkit-scrollbar-thumb { background: var(--line-hot); }

.section-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--pixel);
    font-weight: 400;
    font-size: 13px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.glyph {
    color: var(--acid);
    font-family: var(--mono);
    font-size: 14px;
    line-height: 1;
}

.fine,
.blurb {
    color: var(--dim);
    font-size: 11px;
}

.blurb {
    margin-bottom: 12px;
    color: var(--dim);
}

.fine {
    margin-top: 8px;
}

.mini-label {
    display: block;
    color: var(--faint);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin: 10px 0 6px;
}

.row {
    display: flex;
    gap: 6px;
    margin-top: 8px;
}

.row-tight {
    flex-wrap: wrap;
}

.text-input {
    flex: 1;
    min-width: 0;
    padding: 7px 9px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--line-hot);
    color: var(--ink);
    outline: none;
}

.text-input::placeholder {
    color: var(--faint);
}

.text-input:focus {
    border-color: var(--acid);
}

.btn-sm {
    padding: 5px 9px;
    font-size: 11px;
}

.btn-loud {
    border-color: var(--hot);
    color: var(--hot);
}

.btn-loud:hover {
    background: var(--hot);
    border-color: var(--hot);
    color: #000;
}

/* ---------- source ------------------------------------------------------- */

.source {
    padding-bottom: 4px;
}

.dropzone {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 16px 10px;
    border: 1px dashed var(--line-hot);
    cursor: pointer;
    background:
        linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 9px 9px,
        linear-gradient(0deg, var(--line) 1px, transparent 1px) 0 0 / 9px 9px;
    background-color: rgba(0, 0, 0, 0.35);
    transition: border-color 150ms, background-color 150ms;
}

.dropzone:hover {
    border-color: var(--acid);
    background-color: rgba(212, 255, 0, 0.04);
}

.dropzone-big {
    font-family: var(--pixel);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.dropzone-small {
    color: var(--dim);
    font-size: 11px;
}

.quick {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

/* ---------- drawers ------------------------------------------------------ */

.drawer {
    border: 1px solid var(--line);
    background: rgba(0, 0, 0, 0.25);
}

.drawer[open] {
    border-color: var(--line-hot);
}

.drawer > summary {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 12px;
    cursor: pointer;
    list-style: none;
    user-select: none;
}

.drawer > summary::-webkit-details-marker { display: none; }

.drawer > summary:hover .drawer-title {
    text-shadow: -1px 0 var(--hot), 1px 0 var(--cold);
}

.drawer-title {
    flex: 1;
    font-family: var(--pixel);
    font-size: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.drawer-reset {
    padding: 1px 6px;
    background: none;
    border: 1px solid transparent;
    color: var(--faint);
    font-size: 10px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 120ms;
}

.drawer[open] > summary .drawer-reset,
.drawer > summary:hover .drawer-reset,
.drawer-reset:focus-visible {
    opacity: 1;
}

.drawer-reset:hover {
    border-color: var(--hot);
    color: var(--hot);
}

.chevron {
    width: 14px;
    text-align: center;
    color: var(--dim);
    transition: transform 160ms;
}

.drawer[open] > summary .chevron {
    transform: rotate(45deg);
    color: var(--acid);
}

.drawer-body {
    padding: 2px 12px 14px;
    animation: drawer-in 220ms ease-out;
}

@keyframes drawer-in {
    from { opacity: 0; transform: translateY(-4px); clip-path: inset(0 0 100% 0); }
    to { opacity: 1; transform: none; clip-path: inset(0 0 0 0); }
}

.fineprint {
    margin-top: 6px;
    border-top: 1px dashed var(--line-hot);
}

.fineprint > summary {
    padding: 10px 0 4px;
    color: var(--dim);
    font-size: 11px;
    cursor: pointer;
    list-style: none;
}

.fineprint > summary::-webkit-details-marker { display: none; }
.fineprint > summary::before { content: '▸ '; color: var(--faint); }
.fineprint[open] > summary::before { content: '▾ '; color: var(--acid); }
.fineprint > summary:hover { color: var(--ink); }

/* ---------- knobs -------------------------------------------------------- */

.knob {
    padding: 10px 0 8px;
}

.knob + .knob {
    border-top: 1px solid rgba(255, 255, 255, 0.035);
}

.knob-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 6px;
}

.knob-label {
    font-weight: 600;
    font-size: 12px;
    letter-spacing: 0.01em;
}

.knob.modified .knob-label::after {
    content: ' ◆';
    color: var(--acid);
    font-size: 8px;
    vertical-align: 2px;
}

.knob-value {
    font-size: 11px;
    color: var(--acid);
    font-variant-numeric: tabular-nums;
    text-align: right;
}

.knob-ends {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-top: 3px;
    color: var(--faint);
    font-size: 10px;
}

.knob-ends span:last-child {
    text-align: right;
}

.knob-hint {
    margin-top: 4px;
    color: var(--dim);
    font-size: 11px;
}

/* square "cell" thumb on a hairline track that fills as you go */
input[type="range"] {
    --fill: 50%;
    -webkit-appearance: none;
    appearance: none;
    display: block;
    width: 100%;
    height: 16px;
    background: transparent;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-runnable-track {
    height: 2px;
    background: var(--line-hot);
}

/* streamlined knobs fill up to the thumb */
.knob input[type="range"]::-webkit-slider-runnable-track,
.speed input[type="range"]::-webkit-slider-runnable-track {
    background: linear-gradient(90deg, var(--acid) var(--fill), var(--line-hot) var(--fill));
}

.knob input[type="range"]::-moz-range-track,
.speed input[type="range"]::-moz-range-track {
    background: linear-gradient(90deg, var(--acid) var(--fill), var(--line-hot) var(--fill));
}

input[type="range"]::-moz-range-track {
    height: 2px;
    background: var(--line-hot);
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 10px;
    height: 10px;
    margin-top: -4px;
    background: var(--ink);
    border: 0;
    border-radius: 0;
    box-shadow: 0 0 0 3px var(--bg);
    transition: transform 100ms;
}

input[type="range"]::-moz-range-thumb {
    width: 10px;
    height: 10px;
    background: var(--ink);
    border: 0;
    border-radius: 0;
    box-shadow: 0 0 0 3px var(--bg);
}

input[type="range"]:hover::-webkit-slider-thumb,
input[type="range"]:focus-visible::-webkit-slider-thumb {
    background: var(--acid);
    transform: scale(1.2) rotate(45deg);
}

input[type="range"]:hover::-moz-range-thumb {
    background: var(--acid);
}

input[type="range"]:focus-visible {
    outline: none;
}

/* toggle */
.knob-toggle {
    padding: 10px 0 8px;
}

.toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.toggle input {
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
}

.toggle-track {
    position: relative;
    flex: none;
    width: 30px;
    height: 14px;
    border: 1px solid var(--line-hot);
    background: rgba(0, 0, 0, 0.5);
}

.toggle-track::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 8px;
    height: 8px;
    background: var(--dim);
    transition: transform 140ms steps(3), background 140ms;
}

.toggle input:checked + .toggle-track {
    border-color: var(--acid);
}

.toggle input:checked + .toggle-track::after {
    transform: translateX(16px);
    background: var(--acid);
}

.toggle input:focus-visible + .toggle-track {
    outline: 1px solid var(--acid);
    outline-offset: 2px;
}

/* ---------- palette ------------------------------------------------------ */

.palette-preview {
    position: relative;
    height: 26px;
    margin-bottom: 4px;
    background: var(--strip);
    border: 1px solid var(--line-hot);
    overflow: hidden;
}

/* a square "cell" at the end of the strip shows the background color */
.palette-preview::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 26px;
    background: var(--pbg, #000);
    border-left: 1px solid var(--line-hot);
}

.swatch-block {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.swatch-col {
    flex: 1;
    min-width: 0;
}

.swatch-col-bg {
    flex: none;
}

.swatches {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.swatch-wrap {
    position: relative;
}

.swatch {
    display: block;
    width: 32px;
    height: 32px;
    padding: 0;
    border: 1px solid var(--line-hot);
    background: none;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
}

.swatch::-webkit-color-swatch-wrapper { padding: 0; }
.swatch::-webkit-color-swatch { border: 0; border-radius: 0; }
.swatch::-moz-color-swatch { border: 0; border-radius: 0; }

.swatch:hover {
    border-color: var(--ink);
}

.swatch-bg {
    box-shadow: inset 0 0 0 3px var(--bg);
}

.swatch-add {
    color: var(--dim);
    font-size: 16px;
    border-style: dashed;
}

.swatch-add:hover {
    color: var(--acid);
    border-color: var(--acid);
}

.swatch-remove {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 15px;
    height: 15px;
    display: grid;
    place-items: center;
    padding: 0;
    font-size: 11px;
    line-height: 1;
    background: var(--panel-solid);
    border: 1px solid var(--line-hot);
    color: var(--dim);
    cursor: pointer;
    opacity: 0;
    transition: opacity 100ms;
}

.swatch-wrap:hover .swatch-remove,
.swatch-remove:focus-visible {
    opacity: 1;
}

.swatch-remove:hover {
    color: #000;
    background: var(--hot);
    border-color: var(--hot);
}

.presets {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
}

.preset {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 5px;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--line);
    cursor: pointer;
    text-align: left;
}

.preset:hover {
    border-color: var(--ink);
}

.preset-strip {
    display: block;
    height: 12px;
    background: var(--strip);
    border-right: 8px solid var(--pbg, #000);
}

.preset-name {
    font-size: 10px;
    color: var(--dim);
}

.preset:hover .preset-name {
    color: var(--ink);
}

/* ---------- saved looks -------------------------------------------------- */

.config-list {
    list-style: none;
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-height: 220px;
    overflow-y: auto;
}

.config-empty {
    color: var(--faint);
    font-size: 11px;
    padding: 6px 0;
}

.config-item {
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--line);
    padding: 4px 4px 4px 6px;
}

.config-item:hover {
    border-color: var(--line-hot);
}

.config-strip {
    flex: none;
    width: 22px;
    height: 10px;
    background: var(--line-hot);
}

.config-name {
    flex: 1;
    min-width: 0;
    background: none;
    border: 0;
    text-align: left;
    cursor: pointer;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.config-name:hover {
    color: var(--acid);
}

.config-delete {
    width: 22px;
    height: 22px;
    background: none;
    border: 1px solid transparent;
    color: var(--faint);
    cursor: pointer;
}

.config-delete:hover {
    border-color: var(--hot);
    color: var(--hot);
}

/* ---------- drop veil + toast ------------------------------------------- */

.dropveil {
    position: fixed;
    inset: 0;
    z-index: 50;
    display: grid;
    place-items: center;
    background: rgba(6, 6, 9, 0.82);
    backdrop-filter: blur(4px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 120ms;
}

.dropveil.on {
    opacity: 1;
}

.dropveil-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 60px 80px;
    border: 2px dashed var(--acid);
    animation: ants 0.6s steps(2) infinite;
}

@keyframes ants {
    50% { border-color: var(--hot); }
}

.dropveil-big {
    font-family: var(--pixel);
    font-size: clamp(40px, 9vw, 110px);
    line-height: 1;
    color: var(--acid);
}

.dropveil-big::before,
.dropveil-big::after {
    animation-duration: 0.9s;
}

.dropveil-small {
    color: var(--dim);
    letter-spacing: 0.1em;
}

.toast {
    position: fixed;
    left: 50%;
    bottom: 22px;
    z-index: 60;
    max-width: min(560px, calc(100vw - 32px));
    padding: 9px 14px;
    background: var(--ink);
    color: #000;
    font-size: 12px;
    font-weight: 600;
    clip-path: var(--notch);
    box-shadow: -3px 0 0 var(--hot), 3px 0 0 var(--cold);
    transform: translate(-50%, 20px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 160ms, transform 160ms steps(3);
}

.toast.on {
    opacity: 1;
    transform: translate(-50%, 0);
}

/* ---------- responsive --------------------------------------------------- */

@media (max-width: 1100px) {
    .keys { display: none; }
    .brand-tag { display: none; }
}

@media (max-width: 900px) {
    body {
        overflow: auto;
    }

    .app {
        height: auto;
        min-height: 100dvh;
    }

    .topbar {
        padding: 10px 16px;
    }

    .transport {
        width: 100%;
    }

    .speed {
        flex: 1;
        padding: 0;
    }

    .speed input[type="range"] {
        width: auto;
        flex: 1;
    }

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

    .stage {
        padding: 18px 16px 10px;
    }

    .frame {
        max-height: none;
    }

    .panel {
        border-left: 0;
        border-top: 1px solid var(--line);
    }

    .controls-container {
        height: auto;
        overflow: visible;
        padding: 16px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
    }
}

/* ==========================================================================
   Classic control panel (restored layout: header + collapsible groups)
   ========================================================================== */

.controls-header h2 {
    font-family: var(--pixel);
    font-weight: 400;
    font-size: 13px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.header-buttons,
.config-section {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 8px;
}

.url-row {
    display: flex;
    gap: 6px;
    margin-bottom: 8px;
}

.header-buttons button,
.config-section button,
.url-row button,
.btn-import-label,
.config-load-btn {
    padding: 6px 10px;
    background: transparent;
    border: 1px solid var(--line-hot);
    color: var(--ink);
    font-size: 12px;
    cursor: pointer;
    white-space: nowrap;
}

.header-buttons button:hover,
.config-section button:hover,
.url-row button:hover,
.btn-import-label:hover,
.config-load-btn:hover {
    background: var(--ink);
    color: #000;
    border-color: var(--ink);
}

#btn-pause {
    border-color: var(--acid);
    color: var(--acid);
}

.config-input {
    flex: 1;
    min-width: 0;
    padding: 6px 8px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--line-hot);
    color: var(--ink);
    font: inherit;
    font-size: 12px;
    outline: none;
}

.config-input:focus {
    border-color: var(--acid);
}

.saved-configs-list {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.config-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 3px 3px 8px;
    border: 1px solid var(--line);
}

.config-item .config-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.config-delete-btn {
    width: 24px;
    height: 24px;
    background: none;
    border: 1px solid transparent;
    color: var(--faint);
    cursor: pointer;
}

.config-delete-btn:hover {
    border-color: var(--hot);
    color: var(--hot);
}

.param-group {
    border: 1px solid var(--line-hot);
    background: rgba(0, 0, 0, 0.25);
}

.param-group-header {
    padding: 10px 12px;
    font-family: var(--pixel);
    font-size: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    cursor: pointer;
    user-select: none;
}

.param-group-header::before {
    content: '▾ ';
    color: var(--acid);
}

.param-group.collapsed .param-group-header::before {
    content: '▸ ';
    color: var(--dim);
}

.param-group.collapsed .param-group-content {
    display: none;
}

.param-group-content {
    padding: 0 12px 10px;
}

.slider-control {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: baseline;
    column-gap: 8px;
    padding: 8px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.slider-control > label {
    font-weight: 600;
    font-size: 12px;
}

.slider-control > input[type="range"],
.slider-control > .slider-hint {
    grid-column: 1 / -1;
}

.slider-control > input[type="checkbox"] {
    justify-self: end;
    accent-color: var(--acid);
}

.slider-value {
    font-size: 11px;
    color: var(--acid);
    font-variant-numeric: tabular-nums;
}

.slider-hint {
    margin-top: 3px;
    color: var(--dim);
    font-size: 11px;
}

.controls-header > .slider-hint {
    margin-bottom: 4px;
}

.palette-editor {
    padding: 4px 0 8px;
}

.config-section .config-input {
    flex-basis: 100%;
}

/* ---------- control style switch ---------------------------------------- */

.ui-mode {
    display: flex;
    margin-bottom: 14px;
    border: 1px solid var(--line-hot);
}

.ui-mode button {
    flex: 1;
    padding: 6px 10px;
    background: transparent;
    border: 0;
    color: var(--dim);
    font: inherit;
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
}

.ui-mode button:hover { color: var(--ink); }

.ui-mode button[aria-pressed="true"] {
    background: var(--acid);
    color: #000;
}

/* the transport bar and shortcut hints belong to streamlined mode */
body.ui-classic .keys,
.transport:empty { display: none; }