:root {
    --op-dark: #201d1d;
    --op-dark-surface: #302c2c;
    --op-light: #fdfcfc;
    --op-gray: #9a9898;
    --op-gray-muted: #6e6e73;
    --op-border-warm: rgba(15, 0, 0, 0.12);
    --op-border-outline: #646262;
    --op-accent: #007aff;
    --op-danger: #ff3b30;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background-color: var(--op-dark);
    color: var(--op-light);
    font-family: 'Berkeley Mono', 'IBM Plex Mono', ui-monospace, monospace;
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    display: flex;
    justify-content: center;
    padding: 80px 24px;
}
.layout { width: 100%; max-width: 760px; display: flex; flex-direction: column; gap: 80px; }
h1 { font-size: 38px; font-weight: 700; line-height: 1.50; letter-spacing: -0.02em; }
h2 { font-size: 16px; font-weight: 700; line-height: 1.50; margin-bottom: 24px; color: var(--op-gray); text-transform: uppercase; letter-spacing: 0.1em; }
p { color: var(--op-gray); text-align: justify; font-size: 16px; line-height: 1.50; }
.terminal-block {
    background: var(--op-dark-surface);
    border: 1px solid var(--op-border-outline);
    border-radius: 4px;
    padding: 24px;
    font-size: 14px;
    line-height: 1.6;
    overflow-x: auto;
}
.terminal-block pre { font-family: inherit; margin: 0; color: var(--op-light); }
.token-dim { color: var(--op-gray-muted); }
.sample-row {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--op-border-warm);
    margin-bottom: 40px;
}
.sample-row:last-child { border-bottom: none; }
.sample-title { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.sample-title span { color: var(--op-accent); margin-right: 8px; }
.player-stack { display: grid; grid-template-columns: 110px 1fr; gap: 16px; align-items: center; }
.player-label { font-size: 14px; color: var(--op-gray-muted); font-weight: 400; line-height: 2.0; }
.player-content { display: flex; flex-direction: column; gap: 6px; }
.player-ui {
    display: flex;
    align-items: center;
    gap: 16px;
    border: 1px solid var(--op-border-outline);
    border-radius: 4px;
    padding: 0 16px;
    height: 44px;
    transition: all 0.2s;
}
.player-ui.is-playing { border-color: var(--op-accent); background: rgba(0, 122, 255, 0.03); }
.metrics-group {
    display: flex;
    gap: 8px;
    align-items: center;
}
.metric-tag {
    background: var(--op-dark-surface);
    border: 1px solid var(--op-border-warm);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 11px;
    color: var(--op-gray-muted);
    font-variant-numeric: tabular-nums;
}
.metric-tag span {
    color: var(--op-light);
    font-weight: 700;
    margin-left: 6px;
}
.btn-play {
    background: transparent;
    border: none;
    color: var(--op-light);
    font-family: inherit;
    font-size: 16px;
    font-weight: 500;
    line-height: 1.0;
    cursor: pointer;
    width: 48px;
    text-align: left;
}
.btn-play:hover:not(:disabled) { color: var(--op-accent); }
.btn-play.active { color: var(--op-accent); }
.btn-play:disabled { color: var(--op-gray-muted); }
.timeline {
    flex-grow: 1;
    height: 2px;
    background: var(--op-border-warm);
    position: relative;
    cursor: pointer;
    border-radius: 1px;
}
.timeline::after { content: ''; position: absolute; width: 100%; height: 20px; top: -10px; }
.playhead {
    position: absolute;
    left: 0;
    top: -4px;
    width: 2px;
    height: 10px;
    background: var(--op-gray-muted);
    pointer-events: none;
}
.is-playing .playhead { background: var(--op-accent); }
.time-readout { font-size: 14px; line-height: 2.0; color: var(--op-gray); width: 95px; text-align: right; font-variant-numeric: tabular-nums; }
footer { padding: 40px 0; color: var(--op-gray-muted); font-size: 14px; line-height: 2.0; border-top: 1px solid var(--op-border-warm); }