:root {
    color-scheme: dark;
    --bg: #060908;
    --panel: #0d1210;
    --surface: #141b17;
    --line: #253029;
    --text: #f2f6f3;
    --muted: #8e9b93;
    --mint: #8ee9bd;
    --danger: #ff7670;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    overflow: hidden;
    background: var(--bg);
    color: var(--text);
}

button { font: inherit; }
[hidden] { display: none !important; }
button:disabled { opacity: .45; cursor: default; }
input { accent-color: var(--mint); }
button:focus-visible, input:focus-visible, summary:focus-visible { outline: 2px solid var(--mint); outline-offset: 3px; }

.app-shell {
    display: grid;
    grid-template-columns: 310px minmax(0, 1fr);
    height: 100dvh;
}

.session-panel {
    position: relative;
    z-index: 2;
    display: flex;
    min-height: 0;
    min-width: 0;
    flex-direction: column;
    padding: 24px 18px;
    border-right: 1px solid var(--line);
    background: var(--panel);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
}

.brand-mark {
    width: 34px;
    height: 34px;
    border: 2px solid var(--text);
    border-radius: 50%;
    box-shadow: 0 0 0 5px rgba(142, 233, 189, .12);
}

.brand-mark::after {
    display: block;
    width: 9px;
    height: 9px;
    margin: 10px;
    transform: rotate(45deg);
    background: var(--mint);
    content: "";
}

.brand strong {
    display: block;
    font-size: 17px;
    letter-spacing: .22em;
}

.brand span {
    color: var(--muted);
    font-size: 10px;
    letter-spacing: .16em;
}

.panel-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.panel-heading h1 {
    margin: 0;
    font-size: 14px;
    font-weight: 650;
    letter-spacing: .04em;
}

.icon-button,
.scene-toolbar button {
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
}

.icon-button {
    width: 34px;
    height: 34px;
    font-size: 18px;
}

.icon-button:hover,
.icon-button:focus-visible,
.scene-toolbar button:hover,
.scene-toolbar button:focus-visible {
    border-color: var(--mint);
    outline: none;
}

.session-list {
    display: flex;
    min-height: 0;
    min-width: 0;
    width: 100%;
    flex: 1;
    flex-direction: column;
    gap: 8px;
    overflow-y: auto;
    scrollbar-color: var(--line) transparent;
}

.session-item {
    width: 100%;
    padding: 13px 14px;
    border: 1px solid transparent;
    border-radius: 14px;
    background: var(--surface);
    color: var(--text);
    text-align: left;
    cursor: pointer;
}

.session-item:hover,
.session-item:focus-visible {
    border-color: #3b4b42;
    outline: none;
}

.session-item[aria-current="true"] {
    border-color: var(--mint);
    background: #13221a;
}

.session-item strong,
.session-item span {
    display: block;
}

.session-item strong { font-size: 13px; }

.session-item span {
    margin-top: 4px;
    color: var(--muted);
    font-size: 11px;
}

.empty-list {
    margin: auto 0;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.5;
    text-align: center;
}

.viewport-shell {
    position: relative;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
}

#scene {
    display: block;
    width: 100%;
    height: 100%;
    touch-action: none;
}

.scene-toolbar {
    position: absolute;
    top: 22px;
    right: 22px;
    left: 22px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    z-index: 2;
}
.scene-toolbar label { font-size: 12px; color: var(--muted); background: var(--panel); padding: 10px; border-radius: 10px; }

.scene-toolbar button {
    padding: 9px 13px;
    color: var(--muted);
    font-size: 12px;
}

.metrics {
    position: absolute;
    top: 85px;
    left: 22px;
    display: flex;
    gap: 1px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--line);
}

.metrics div {
    min-width: 88px;
    padding: 10px 13px;
    background: rgba(13, 18, 16, .94);
}

.metrics span,
.metrics strong { display: block; }

.metrics span {
    color: var(--muted);
    font-size: 9px;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.metrics strong {
    margin-top: 3px;
    font-size: 16px;
    font-variant-numeric: tabular-nums;
}

.scene-status {
    position: absolute;
    left: 50%;
    bottom: 105px;
    max-width: min(520px, calc(100% - 40px));
    padding: 9px 13px;
    transform: translateX(-50%);
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(13, 18, 16, .92);
    color: var(--muted);
    font-size: 11px;
    text-align: center;
}

.fallback {
    position: absolute;
    inset: 0;
    padding: 185px 30px 110px;
    background: var(--bg);
    color: var(--muted);
    text-align: center;
}

.fallback svg {
    width: 100%;
    height: calc(100% - 40px);
}

@media (max-width: 760px) {
    html, body { height: auto; overflow: auto; }
    .app-shell {
        grid-template: minmax(540px, 70dvh) auto / minmax(0, 1fr);
        height: auto;
    }

    .viewport-shell { grid-row: 1; }

    .session-panel {
        grid-row: 2;
        padding: 13px 14px;
        border-top: 1px solid var(--line);
        border-right: 0;
    }

    .brand { display: none; }

    .panel-heading { margin-bottom: 8px; }

    .session-list {
        flex-direction: row;
        overflow-x: auto;
        overflow-y: hidden;
        flex: none;
    }

    .session-item {
        min-width: 190px;
        height: 88px;
    }

    .metrics {
        top: 110px;
        left: 12px;
    }

    .metrics div {
        min-width: 68px;
        padding: 8px 9px;
    }

    .scene-toolbar {
        top: 12px;
        right: 12px;
        left: 12px;
    }
}

.scene-key { position: absolute; left: 22px; right: 22px; top: 154px; color: var(--muted); font-size: 11px; pointer-events: none; }
.playback { position: absolute; left: 22px; right: 22px; bottom: 18px; display: grid; grid-template-columns: 44px auto 1fr; align-items: center; gap: 10px; padding: 12px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); font-size: 12px; }
.playback output { grid-column: 1 / -1; color: var(--muted); font-variant-numeric: tabular-nums; }
.playback button, #reprocess { min-height: 40px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--text); cursor: pointer; }
.playback input { width: 100%; min-width: 0; }
.inspector { padding-top: 16px; border-top: 1px solid var(--line); margin-top: 16px; font-size: 12px; line-height: 1.5; max-height: 44%; overflow: auto; }
.inspector h2 { font-size: 14px; margin: 0; }
.inspector p, .inspector li { color: var(--muted); }
.inspector summary { cursor: pointer; color: var(--mint); padding: 8px 0; }
.inspector a { display: inline-block; color: var(--mint); padding: 6px 0; }
.inspector ul { padding-left: 18px; }
#reprocess { margin-top: 12px; width: 100%; padding: 8px; }
.metrics, .playback, .scene-key, .scene-status { z-index: 1; }
.scene-status { pointer-events: none; }
@media (max-width: 760px) {
    .scene-toolbar button { min-height: 42px; }
    .scene-key { top: 180px; left: 12px; right: 12px; font-size: 10px; }
    .inspector { max-height: none; }
    .scene-status { bottom: 125px; font-size: 10px; }
    body[data-mode="hand"] .scene-status { bottom: 165px; }
    .playback { left: 12px; right: 12px; grid-template-columns: 44px 1fr; }
    .playback input { grid-column: 1 / -1; }
}