.demo { max-width: 820px; margin: 0 auto; padding: 1rem; }

.warn { background: #fff3cd; border: 1px solid #ffe69c; padding: .5rem .75rem; border-radius: 6px; margin: .5rem 0; }

/* Controls row */
.qpack-controls { display: flex; gap: .75rem; align-items: center; margin: 1rem 0; flex-wrap: wrap; }
.qpack-controls button { padding: .5rem 1rem; border: none; border-radius: 6px; font: inherit; font-weight: 600; cursor: pointer; background: var(--accent); color: #fff; }
.qpack-controls button:hover:not(:disabled) { background: #1d4ed8; }
.qpack-controls button:disabled { background: #cbd5e1; cursor: default; }
#status { font-size: .85rem; color: var(--muted); }

/* Scoreboard */
.qpack-scoreboard { display: flex; gap: 1rem; margin: 1.25rem 0; flex-wrap: wrap; }
.score { display: flex; flex-direction: column; align-items: center; padding: 1rem 1.5rem; border: 1px solid var(--border); border-radius: 8px; min-width: 120px; }
.score .label { font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin-bottom: .35rem; }
.score strong { font-size: 1.75rem; font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; }
.score.hpack strong { color: var(--warn); }
.score.qpack strong { color: var(--ok); }

/* Repeat-request story callout */
.qpack-story { background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 6px; padding: .6rem .9rem; margin: .75rem 0; }

/* Cumulative chart */
.qpack-chart { margin: 1.25rem 0; }
.qpack-chart h3 { font-size: .9rem; margin: 0 0 .5rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
.cum-row { display: flex; flex-direction: column; gap: 3px; margin-bottom: .6rem; }
.cum-row::before { content: "req #" attr(data-n); font-size: .75rem; color: var(--muted); font-family: ui-monospace, monospace; }
.cum-bar { height: 1.3rem; border-radius: 3px; display: flex; align-items: center; padding: 0 .4rem; font: 12px/1 ui-monospace, monospace; color: #fff; white-space: nowrap; min-width: 2px; transition: width .3s ease; }
.cum-bar.raw   { background: #64748b; }
.cum-bar.hpack { background: var(--warn); }
.cum-bar.qpack { background: var(--ok); }

/* Field-by-field anatomy */
.qpack-anatomy { margin: 1rem 0; }
.qpack-anatomy summary { cursor: pointer; font-weight: 600; font-size: .9rem; color: var(--accent); user-select: none; }
.qpack-anatomy table { width: 100%; border-collapse: collapse; margin-top: .6rem; font-size: .82rem; font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; }
.qpack-anatomy th { text-align: left; padding: .25rem .5rem; background: var(--code-bg); border-bottom: 1px solid var(--border); font-weight: 600; color: var(--muted); font-size: .75rem; text-transform: uppercase; letter-spacing: .04em; }
.qpack-anatomy td { padding: .25rem .5rem; border-bottom: 1px solid #f0f0f0; vertical-align: top; }
.qpack-anatomy tr:last-child td { border-bottom: none; }

/* Honesty caveat */
.qpack-caveat { font-size: .8rem; color: var(--muted); margin-top: 1.25rem; font-style: italic; }

@media (max-width: 600px) {
  .qpack-scoreboard { gap: .6rem; }
  .score { padding: .75rem 1rem; min-width: 100px; }
  .score strong { font-size: 1.4rem; }
}