/* A self-contained page. No remote fonts, framework, or inherited site scripts. */
:root {
  color-scheme: light dark;
  --bg: #f6f3ee; --panel: #fffdf9; --fg: #26221d; --muted: #6f675d; --rule: #e2dbd0;
  --stage: #ece6dc; --accent: #9a6b44; --accent-fg: #fffdf9; --error: #a23b2a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121110; --panel: #1b1a18; --fg: #ebe6de; --muted: #a39b90; --rule: #33302b;
    --stage: #0c0b0a; --accent: #d1a57c; --accent-fg: #1b1a18; --error: #f0a493;
  }
}
.knight-page { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
.knight-page *, .knight-page *::before, .knight-page *::after { box-sizing: border-box; }
.knight-page [hidden] { display: none !important; }
.knight-page a { color: inherit; text-underline-offset: 3px; }
.knight-page button, .knight-page input, .knight-page select { font: inherit; color: inherit; }
.knight-page button { cursor: pointer; }
.knight-page :focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.knight-page button:disabled, .knight-page input:disabled, .knight-page select:disabled { opacity: .45; cursor: not-allowed; }
.knight-page h1, .knight-page h2, .knight-page p { margin: 0; }
.knight-page .page-width { width: min(1080px, calc(100% - 32px)); margin-left: auto; margin-right: auto; }
.knight-page .visually-hidden { width: 1px; height: 1px; position: absolute; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.knight-page .skip-link { position: absolute; left: 16px; top: -60px; padding: 10px; z-index: 20; background: var(--panel); }
.knight-page .skip-link:focus { top: 10px; }

.knight-page .site-header { padding: 24px 0; font-size: 14px; }
.knight-page .site-header a, .knight-page .site-footer a { color: var(--muted); text-decoration: none; }
.knight-page .site-header a:hover, .knight-page .site-footer a:hover { color: var(--fg); }

.knight-page .intro { padding: 32px 0 36px; max-width: 640px; }
.knight-page h1 { font: 400 clamp(40px, 6vw, 56px)/1.05 Georgia, "Times New Roman", serif; letter-spacing: -.02em; margin-bottom: 14px; }
.knight-page .intro p { color: var(--muted); font-size: 17px; }

.knight-page .tool { background: var(--panel); border: 1px solid var(--rule); border-radius: 12px; padding: 24px; display: grid; gap: 20px; }
.knight-page .notice { font-size: 14px; color: var(--muted); }
.knight-page .notice-error { color: var(--error); }

.knight-page .dropzone { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; padding: 20px; border: 1px dashed var(--rule); border-radius: 10px; transition: border-color .15s, background .15s; }
.knight-page .dropzone.drag-over { border-color: var(--accent); background: var(--stage); }
.knight-page .dropzone.is-busy { opacity: .6; }
.knight-page #file-hint { color: var(--muted); font-size: 14px; }
.knight-page .file-details { flex-basis: 100%; display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; font-size: 14px; overflow-wrap: anywhere; }
.knight-page #file-metadata { color: var(--muted); }

.knight-page .button { display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--rule); border-radius: 8px; background: transparent; padding: 9px 16px; font-size: 15px; font-weight: 500; line-height: 1.3; text-decoration: none; }
.knight-page .button:not(:disabled):hover { border-color: var(--muted); }
.knight-page .button-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
.knight-page .button-primary:not(:disabled):hover { border-color: var(--accent); filter: brightness(1.08); }
.knight-page .text-button { background: none; border: 0; padding: 4px 0; font-size: 14px; color: var(--muted); text-decoration: underline; text-underline-offset: 3px; }
.knight-page .text-button:hover { color: var(--fg); }

.knight-page .settings { display: grid; gap: 16px; }
.knight-page fieldset { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; padding: 0; margin: 0; border: 0; min-width: 0; }
.knight-page label { display: block; font-size: 14px; min-width: 0; }
.knight-page label > span { color: var(--muted); font-size: 13px; }
.knight-page input[type="number"], .knight-page select { display: block; width: 100%; min-width: 0; margin-top: 4px; padding: 8px 10px; border: 1px solid var(--rule); border-radius: 8px; background: var(--bg); font-size: 15px; }
.knight-page .run { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; }
.knight-page #estimate { color: var(--muted); font-size: 14px; font-variant-numeric: tabular-nums; }

.knight-page .progress { display: grid; grid-template-columns: 1fr auto; gap: 8px 12px; align-items: baseline; }
.knight-page #status { font-size: 14px; }
.knight-page #progress-detail { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.knight-page progress { grid-column: 1 / -1; display: block; width: 100%; height: 3px; border: 0; border-radius: 3px; overflow: hidden; background: var(--rule); accent-color: var(--accent); }
.knight-page progress::-webkit-progress-bar { background: var(--rule); }
.knight-page progress::-webkit-progress-value { background: var(--accent); }
.knight-page progress::-moz-progress-bar { background: var(--accent); }
.knight-page .error-message { grid-column: 1 / -1; color: var(--error); font-size: 14px; }

.knight-page .results { padding-top: 32px; }
.knight-page .comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.knight-page .video-card { min-width: 0; }
.knight-page .video-card h2 { font-size: 14px; font-weight: 500; color: var(--muted); margin-bottom: 8px; }
.knight-page .video-stage { aspect-ratio: 16 / 10; position: relative; background: var(--stage); border-radius: 8px; display: grid; place-items: center; overflow: hidden; }
.knight-page .video-stage video, .knight-page .video-stage canvas { display: block; width: 100%; height: 100%; position: absolute; inset: 0; object-fit: contain; }
/* Required with preview-player.js. All native media, including temporary decoder elements, stays connected but has no visible plane. */
.knight-page video { display: none !important; visibility: hidden !important; }
.knight-page .canvas-preview { position: absolute; inset: 0; display: grid; grid-template-rows: minmax(0, 1fr) auto; min-width: 0; min-height: 0; background: var(--stage); }
.knight-page .canvas-preview-frame { position: relative; min-width: 0; min-height: 0; overflow: hidden; }
.knight-page .canvas-preview-frame canvas { object-fit: contain; }
.knight-page .canvas-preview-controls { display: flex; align-items: center; gap: 8px; padding: 6px 8px; background: var(--panel); border-top: 1px solid var(--rule); }
.knight-page .canvas-preview-controls button { flex-shrink: 0; min-height: 28px; background: none; border: 1px solid var(--rule); border-radius: 6px; padding: 2px 8px; font-size: 12px; }
.knight-page .canvas-preview-controls input { flex: 1 1 80px; min-width: 40px; width: 0; accent-color: var(--accent); }
.knight-page .canvas-preview-time { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.knight-page .canvas-preview:fullscreen { position: fixed; inset: 0; width: 100vw; height: 100dvh; }
.knight-page .video-empty { color: var(--muted); font-size: 14px; }
.knight-page .video-actions { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 16px; padding-top: 8px; font-size: 13px; }
.knight-page .video-actions button { background: none; border: 0; padding: 0; color: var(--muted); font-size: 13px; text-decoration: underline; text-underline-offset: 3px; }
.knight-page .video-actions button:not(:disabled):hover { color: var(--fg); }
.knight-page .video-actions span { margin-left: auto; color: var(--muted); }
.knight-page .comparison-tools { display: flex; align-items: center; gap: 16px; margin-top: 16px; }

.knight-page .result-files { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px; margin-top: 24px; padding: 20px 24px; background: var(--panel); border: 1px solid var(--rule); border-radius: 12px; }
.knight-page .result-files h2 { font: 400 24px/1.2 Georgia, serif; margin-bottom: 4px; }
.knight-page #report-summary { color: var(--muted); font-size: 14px; }
.knight-page .download-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; }

.knight-page .site-footer { padding: 32px 0 40px; font-size: 14px; color: var(--muted); }

.knight-page dialog { width: min(96vw, 1600px); height: 92dvh; max-width: none; max-height: 96dvh; border: 1px solid var(--rule); border-radius: 12px; padding: 0; background: var(--panel); color: var(--fg); }
.knight-page dialog[open] { display: flex; flex-direction: column; }
.knight-page dialog::backdrop { background: #000c; }
.knight-page dialog:fullscreen { width: 100vw; height: 100dvh; max-height: none; border: 0; border-radius: 0; }
.knight-page .inspector-header { display: flex; justify-content: space-between; gap: 16px; align-items: center; padding: 14px 16px; border-bottom: 1px solid var(--rule); }
.knight-page .inspector-header h2 { font-size: 18px; font-weight: 500; }
.knight-page #frame-meta { color: var(--muted); font-size: 13px; }
.knight-page .inspector-controls { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; padding: 10px 16px; }
.knight-page .inspector-controls .button { padding: 6px 12px; font-size: 13px; }
.knight-page #zoom-label { color: var(--muted); font-size: 13px; margin-left: auto; }
.knight-page #frame-viewport { flex: 1; min-height: 0; overflow: auto; background: var(--stage); overscroll-behavior: contain; }
.knight-page #frame-canvas { display: block; cursor: grab; touch-action: none; }
.knight-page #frame-canvas.zoom-fit { width: auto; height: auto; max-width: 100%; max-height: 65dvh; object-fit: contain; margin: auto; }
.knight-page #frame-canvas.zoom-native { max-width: none; max-height: none; width: auto; height: auto; zoom: 1; }
.knight-page #frame-canvas.zoom-double { max-width: none; max-height: none; width: auto; height: auto; zoom: 2; }
.knight-page #frame-canvas.is-dragging { cursor: grabbing; }
.knight-page #frame-help { padding: 10px 16px; color: var(--muted); font-size: 13px; }

@media (max-width: 800px) {
  .knight-page fieldset { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .knight-page .comparison { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .knight-page .tool { padding: 16px; }
  .knight-page fieldset { grid-template-columns: 1fr 1fr; }
  .knight-page .intro { padding-top: 16px; }
}
@media (prefers-reduced-motion: reduce) { .knight-page * { transition: none !important; } }