.pair-page{max-width:1440px;margin:auto;padding:24px 28px 48px}.pair-page.narrow{max-width:600px;padding-top:68px}.intro{margin:14px 0 32px;color:var(--muted)}.pair-field{margin:24px 0}.pair-field label{display:block;margin-bottom:10px;font-weight:550}.pair-field input,.pair-field select{width:100%;min-height:48px;padding:11px 14px;border:1px solid var(--line);border-radius:6px;color:var(--text);background:#fff}#entry-form{margin-top:0}#entry-form>.pair-field:first-child{margin-top:0}.entry-actions{margin-top:36px}.entry-actions .primary{width:100%}.comparison-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:22px}.comparison-heading h1{font-size:26px}.players-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.player-card{min-width:0}.player-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;min-height:36px}.player-heading h2{font-size:16px;font-weight:600}.audio-toggle{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;padding:0;border:1px solid transparent;border-radius:6px;background:transparent;color:var(--muted);font-size:13px}.audio-toggle[aria-pressed=true]{color:var(--accent);background:var(--accent-soft)}.audio-toggle:hover{border-color:var(--line)}.pair-video{display:block;width:100%;aspect-ratio:16/9;border-radius:8px;background:#17251c}.player-placeholder{display:grid;place-items:center;aspect-ratio:16/9;padding:24px;border-radius:8px;background:var(--soft);color:var(--muted)}.player-error{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:8px}.player-error .text-button{color:var(--accent);white-space:nowrap;font-size:13px}.transport{display:grid;grid-template-columns:auto auto minmax(160px,1fr) auto;gap:16px;align-items:center;padding:18px 0 22px}.transport .primary{min-width:134px;padding:9px 16px;min-height:44px}.transport .primary svg{width:19px;height:19px}.seek-buttons{display:flex;gap:2px}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;padding:0;border:0;border-radius:6px;background:transparent;color:var(--muted);flex-shrink:0}.icon-button:hover:not(:disabled){background:var(--soft);color:var(--text)}.timeline{display:flex;align-items:center;gap:12px;min-width:0}.timecode{font-variant-numeric:tabular-nums;font-size:12px;color:var(--muted);white-space:nowrap}.timeline input{width:100%;min-width:0;margin:0;height:44px;accent-color:var(--accent);cursor:pointer}.playback-speed{min-height:44px;border:1px solid var(--line);border-radius:6px;padding:6px 8px;background:var(--bg);color:var(--text);max-width:86px;font-size:14px}.compare-question{border:0;border-top:1px solid var(--line);padding:22px 0;margin:0;min-width:0}.compare-question:after{content:"";display:block;clear:both}.compare-question legend{float:left;width:39%;font-size:17px;font-weight:550;padding:10px 24px 10px 0}.compare-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-left:41%}.compare-option{position:relative;display:flex;align-items:center;justify-content:center;min-height:48px;padding:8px 6px;border:1px solid var(--line);border-radius:6px;background:transparent;font-size:14px;cursor:pointer;text-align:center}.compare-option input{position:absolute;inset:0;width:100%;height:100%;opacity:0;margin:0;cursor:pointer}.compare-option:has(input:checked){background:var(--selected);border-color:var(--selected);color:#fff}.compare-option:has(input:focus-visible){outline:3px solid #a1cdbb;outline-offset:3px}.compare-option:hover{border-color:var(--selected)}.compare-question.required-missing{outline:2px solid #c4766e;outline-offset:5px;border-radius:4px}.optional-feedback{border-top:1px solid var(--line);padding:20px 0}.optional-feedback summary{display:flex;align-items:center;gap:10px;cursor:pointer;list-style:none;font-size:15px}.optional-feedback summary:before{content:"＋";font-size:20px}.optional-feedback[open] summary:before{content:"−"}.optional-feedback summary::-webkit-details-marker{display:none}.optional-feedback textarea{display:block;width:100%;min-height:112px;margin-top:18px;padding:11px 13px;resize:vertical;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--text);font-size:14px}.pair-actions{display:flex;justify-content:space-between;align-items:center;gap:16px;padding-top:22px;border-top:1px solid var(--line)}.form-error{padding:0 0 18px}.saved-note{display:flex;align-items:center;gap:12px;margin-top:16px;font-size:13px;color:var(--muted)}.saved-note button{font-size:13px;color:var(--accent);border:0;background:none;padding:4px}.complete-icon{color:var(--accent);display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:var(--accent-soft);font-size:25px;margin-bottom:24px}.complete-card{margin:30px 0;border-top:1px solid var(--line)}.complete-card dl{margin:0}.complete-card dl>div{display:flex;justify-content:space-between;gap:24px;padding:14px 0;border-bottom:1px solid var(--line)}.complete-card dt{color:var(--muted);font-size:14px}.complete-card dd{margin:0;text-align:right;overflow-wrap:anywhere;font-size:14px}.receipt{font-variant-numeric:tabular-nums}.session-error{margin:24px 0}.connection-error{margin-top:18px}.full{width:100%}
@media(max-width:760px){.pair-page{padding:26px 20px 40px}.pair-page.narrow{padding-top:42px}.comparison-heading{margin-bottom:18px}.comparison-heading h1{font-size:23px}.players-grid{gap:18px}.transport{gap:8px;grid-template-columns:auto auto minmax(110px,1fr) auto}.transport .primary{min-width:112px;padding:9px 12px;gap:8px}.compare-question{padding:19px 0}.compare-question legend{float:none;width:100%;padding:0 0 14px;font-size:16px}.compare-options{margin-left:0}.pair-actions .primary{padding:10px 18px}}
@media(max-width:600px){.players-grid{grid-template-columns:1fr;gap:16px}.player-heading{margin-bottom:7px}.transport{grid-template-columns:1fr auto auto;padding:16px 0 18px}.transport .primary{justify-self:start;min-width:124px}.timeline{grid-row:2;grid-column:1/-1;gap:10px}.playback-speed{justify-self:end}.compare-options{gap:7px}.compare-option{font-size:13px;min-height:46px}.optional-feedback{padding:18px 0}.pair-page.narrow .pair-actions{flex-wrap:wrap}.player-card h2{font-size:15px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}#toast{transition:none}}
@media(max-width:600px){.transport .primary{min-width:104px;padding:9px 8px;gap:6px;font-size:14px}.transport .playback-speed{width:68px;padding:6px 4px}.compare-question legend{float:left;width:100%;padding:0 0 12px}.compare-options{clear:both}}
@media(max-width:360px){.compare-option{font-size:12px}}

.option-vertical{display:none}@media(max-width:600px){.option-horizontal{display:none}.option-vertical{display:inline}}

.submit-actions{justify-content:flex-end}

.site-nav{display:flex;align-items:center;gap:24px;font-size:14px;white-space:nowrap}.site-nav a{display:inline-flex;align-items:center;min-height:44px;color:var(--muted)}.site-nav a[aria-current=page]{color:var(--accent)}
.transport{grid-template-columns:auto auto minmax(120px,1fr) auto auto}.subtitle-mode{min-height:44px;max-width:122px;padding:6px 8px;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--text);font-size:14px}.pair-video::cue{color:#fff;background:transparent;font-family:Arial,"Noto Sans CJK SC","PingFang SC","Microsoft YaHei",sans-serif;font-size:90%;text-shadow:-1px -1px 0 #000,1px -1px 0 #000,-1px 1px 0 #000,1px 1px 0 #000,0 1px 3px #000}.pair-video::cue(.en){color:#fff}.pair-video::cue(.zh),.pair-video[data-subtitle-mode=zh]::cue{color:#ffe07a}
.material-toolbar{display:flex;align-items:center;margin-bottom:20px}.material-toolbar select,.material-version{min-height:44px;max-width:100%;padding:8px 12px;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--text);font-size:14px}.material-player{min-width:0}.material-version{margin-bottom:10px}.material-download{display:inline-flex;align-items:center;min-height:40px;font-size:13px;color:var(--muted)}.material-download:hover{color:var(--accent)}
@media(max-width:900px){.transport{grid-template-columns:auto auto 1fr auto}.transport .timeline{grid-column:1/-1;grid-row:2}.transport .playback-speed{justify-self:end}.transport .subtitle-mode{grid-row:1;grid-column:4}.site-nav{gap:18px}}
@media(max-width:600px){.site-header{gap:12px}.site-nav{gap:14px;font-size:13px}.site-nav .preview-label{font-size:12px}.transport{grid-template-columns:1fr auto;gap:8px;padding:16px 0 18px}.transport .primary{grid-column:1;grid-row:1}.transport .seek-buttons{grid-column:2;grid-row:1;justify-self:end}.transport .timeline{grid-column:1/-1;grid-row:2}.transport .playback-speed{grid-column:1;grid-row:3;justify-self:start;width:80px}.transport .subtitle-mode{grid-column:2;grid-row:3;justify-self:end;width:118px}.material-toolbar{margin-bottom:16px}.material-toolbar select{width:100%}}
@media(max-width:420px){.site-header .brand span{display:none}.site-nav{gap:16px}}

.group-navigation{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:20px;min-height:40px}.group-counter{font-size:14px;color:var(--muted);font-variant-numeric:tabular-nums}.group-links{display:flex;gap:8px}.group-link{display:inline-flex;align-items:center;justify-content:center;min-width:38px;min-height:38px;padding:4px 10px;border:1px solid var(--line);border-radius:6px;font-size:14px;color:var(--muted)}.group-link.completed{color:var(--accent);background:var(--accent-soft);border-color:transparent}.group-link[aria-current=step]{border-color:var(--accent);color:var(--accent)}.group-link:hover{border-color:var(--accent)}.complete-card+.group-navigation{margin-top:24px}.narrow .group-navigation{margin-bottom:26px}

/* Keep the subtitle text below the video and wrap it within the player width. */
main{min-height:100svh}
.pair-video{border-radius:8px 8px 0 0}
.players-grid{gap:24px}
.caption-line{
  min-height:calc(3em + 16px);
  padding:8px 12px;
  background:#17251c;
  color:#fff;
  border-radius:0 0 8px 8px;
  font-size:14px;
  line-height:1.5;
  white-space:pre-line;
  overflow-wrap:anywhere;
}
.caption-line[data-language=en],.caption-line[data-language=zh]{min-height:calc(1.5em + 16px)}
.caption-content,.caption-cue{display:block}
.caption-cue+.caption-cue{margin-top:.35em}
.caption-content .zh,.caption-line[data-language=zh]{color:#ffe07a}
.player-card:has(.caption-line[hidden]) .pair-video{border-radius:8px}
.caption-controls{display:flex;justify-content:flex-end;align-items:center;gap:10px;min-height:42px;padding:4px 0 6px}
.caption-controls .pair-play{min-height:36px;padding:4px 12px;font-size:13px;white-space:nowrap}
.caption-controls .subtitle-mode{min-height:30px;max-width:112px;padding:2px 6px;border-color:transparent;background:transparent;color:var(--muted);font-size:12px}
.caption-controls .subtitle-mode:hover,.caption-controls .subtitle-mode:focus-visible{border-color:var(--line)}
.group-navigation{margin-bottom:14px;min-height:34px}
.group-link{min-height:32px;min-width:32px;padding:2px 8px;font-size:13px}
@media(max-width:760px){.pair-page{padding:18px 18px 36px}.players-grid{gap:16px}.caption-line{font-size:13px;padding:8px 10px}}
@media(max-width:600px){main{min-height:100svh}.pair-page{padding:14px 14px 32px}.pair-page.narrow{padding:40px 22px}.players-grid{gap:12px}.group-navigation{margin-bottom:12px}.caption-controls{min-height:38px;padding:2px 0 4px}.compare-question{padding:17px 0}.compare-question legend{padding-bottom:12px}}

/* A single, compact receipt for the participant's completion screenshot. */
.completion-layout{max-width:560px;margin:0 auto;text-align:center}
.completion-proof{padding:36px 32px 22px;border:1px solid var(--line);border-radius:12px;background:#fff}
.completion-proof .complete-icon{width:56px;height:56px;margin:0 auto 20px;font-size:28px}
.completion-proof h1{font-size:30px;line-height:1.4;overflow-wrap:anywhere;letter-spacing:0}
.completion-thanks{margin-top:10px;font-size:15px;color:var(--muted)}
.completion-next{margin-top:28px;padding:18px 20px;background:var(--accent-soft);border-radius:8px;text-align:left}
.completion-next h2{margin:0 0 8px;color:var(--accent);font-size:16px;font-weight:600}
.completion-next p{font-size:15px;line-height:1.9}
.completion-next strong{font-weight:600;white-space:nowrap}
.completion-meta{margin:24px 0 0;font-size:14px;text-align:left}
.completion-meta>div{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:12px 0;border-top:1px solid var(--line)}
.completion-meta dt{color:var(--muted)}
.completion-meta dd{margin:0;color:var(--text);font-variant-numeric:tabular-nums}
.completion-meta .receipt{letter-spacing:.06em;overflow-wrap:anywhere}
.completion-review{margin-top:18px;font-size:14px}
@media(max-width:600px){.pair-page.narrow:has(.completion-layout){padding:24px 16px}.completion-proof{padding:28px 22px 14px}.completion-proof h1{font-size:27px}.completion-next{padding:16px;margin-top:24px}.completion-next p{font-size:14px}.completion-thanks{font-size:14px}.completion-meta{margin-top:20px}.completion-meta>div{padding:11px 0}.completion-review{margin-top:12px}}
@media(max-width:360px){.completion-proof{padding:24px 16px 12px}.completion-next{padding:14px}.completion-next p{line-height:1.8}}

.completion-proof h1:focus{outline:none}

.group-links{min-width:0;overflow-x:auto;scrollbar-width:thin}.group-counter,.group-link{flex-shrink:0}

.watch-status{color:var(--muted);font-size:13px;padding:8px 0}

/* Side-by-side review layout. */
.pair-page:has(.players-grid){
  max-width:1250px;
  padding:24px 32px 48px;
  --line:#dce4df;
  --accent:#17684f;
  --accent-soft:#e8f3ec;
  --text:#15251d;
  --muted:#5b6b63;
}
.pair-page:has(.players-grid) .group-navigation{margin-bottom:16px;gap:16px}
.pair-page:has(.players-grid) .group-counter{color:var(--text);font-weight:650;font-size:14px;white-space:nowrap}
.pair-page:has(.players-grid) .group-links{gap:3px;padding:2px}
.pair-page:has(.players-grid) .group-link{border-color:transparent;border-radius:6px;min-width:32px;color:var(--muted)}
.pair-page:has(.players-grid) .group-link.completed{color:var(--accent);background:var(--accent-soft)}
.pair-page:has(.players-grid) .group-link[aria-current=step]{background:var(--accent);border-color:var(--accent);color:white;font-weight:650}
.pair-page:has(.players-grid) .group-link:hover:not([aria-current=step]){border-color:var(--line)}
.pair-page:has(.players-grid) .players-grid{gap:20px;align-items:start}
.pair-page:has(.players-grid) .pair-video{border-radius:9px 9px 0 0}
.pair-page:has(.players-grid) .player-card:has(.caption-line[hidden]) .pair-video{border-radius:9px}
.pair-page:has(.players-grid) .caption-line{border-radius:0 0 9px 9px;background:#182520;min-height:calc(3em + 16px);padding:8px 12px}
.pair-page:has(.players-grid) .caption-line[data-language=en],
.pair-page:has(.players-grid) .caption-line[data-language=zh]{min-height:calc(1.5em + 16px)}
.pair-page:has(.players-grid) .caption-controls{gap:12px;padding:8px 0 12px}
.pair-page:has(.players-grid) .pair-play{min-height:36px;border-radius:6px}
.pair-page:has(.players-grid) .subtitle-mode{min-height:36px;font-size:13px}
.pair-page:has(.players-grid) .compare-question{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,440px);gap:24px;align-items:center;padding:12px 0}
.pair-page:has(.players-grid) .compare-question::after{display:none}
.pair-page:has(.players-grid) .compare-question legend{float:left;display:contents;font-weight:600;font-size:16px;line-height:1.55}
.pair-page:has(.players-grid) .compare-options{margin:0;gap:3px;padding:3px;border-radius:8px;background:#eef3ef}
.pair-page:has(.players-grid) .compare-option{border-color:transparent;border-radius:6px;min-height:38px}
.pair-page:has(.players-grid) .compare-option:hover{background:#e1ece4}
.pair-page:has(.players-grid) .compare-option:has(input:checked){background:#fff;color:var(--accent);border-color:#9cbfae;font-weight:650}
.pair-page:has(.players-grid) .optional-feedback{padding:13px 0}
.pair-page:has(.players-grid) .optional-feedback summary{color:var(--muted);width:max-content}
.pair-page:has(.players-grid) .pair-actions{padding-top:14px}
.pair-page:has(.players-grid) .pair-actions .primary{min-height:44px;border-radius:7px}
@media(max-width:760px){
  .pair-page:has(.players-grid){padding:16px 18px 32px}
  .pair-page:has(.players-grid) .compare-question{grid-template-columns:minmax(0,1fr) minmax(0,54%);gap:12px}
}
@media(max-width:600px){
  .pair-page:has(.players-grid){padding:12px 14px 28px}
  .pair-page:has(.players-grid) .players-grid{gap:12px}
  .pair-page:has(.players-grid) .group-navigation{gap:10px}
  .pair-page:has(.players-grid) .group-links{gap:1px}
  .pair-page:has(.players-grid) .group-link{min-width:24px;min-height:36px;padding:2px 3px}
  .pair-page:has(.players-grid) .compare-question{grid-template-columns:minmax(0,1fr);gap:9px}
  .pair-page:has(.players-grid) .compare-option{min-height:44px}
  .pair-page:has(.players-grid) .caption-controls{padding:6px 0 10px}
  .pair-page:has(.players-grid) .pair-play,.pair-page:has(.players-grid) .subtitle-mode{min-height:40px}
}

.placeholder-symbol{display:grid;place-items:center;width:54px;height:54px;border:1px solid var(--line);border-radius:50%;font-size:28px;line-height:1;padding-left:3px}

.demo-note{font-size:13px;margin:6px 0 14px}


.rated-player {min-width:0}
.mobile-side {display:none}
.compare-toolbar {display:flex;gap:18px;align-items:center;margin-bottom:16px}
.pair-page:has(.players-grid) .compare-toolbar .group-navigation {flex:1;min-width:0;margin:0}
.pair-page:has(.players-grid) .compare-toolbar .caption-controls {padding:0;flex-shrink:0;gap:6px}
.pair-page:has(.players-grid) .quality-pair {gap:9px 20px;margin-bottom:18px}
.quality-pair [data-side="A"] {grid-area:1 / 1}
.quality-pair [data-side="B"] {grid-area:1 / 2}
.quality-heading {
  grid-area:2 / 1 / auto / -1;
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  gap:10px;
  padding-top:4px;
}
.quality-heading h2 {margin:0;font-size:16px;font-weight:650;color:var(--text)}
.quality-heading span {color:var(--muted);font-size:13px;white-space:nowrap}
.quality-rating {min-width:0;margin:0;padding:0;border:0}
#quality-A {grid-area:3 / 1}
#quality-B {grid-area:3 / 2}
.quality-options {
  display:grid;
  grid-template-columns:repeat(5,minmax(0,1fr));
  gap:5px;
}
.quality-pair .quality-options .compare-option {border-color:var(--line)}
.quality-rating.required-missing {outline:2px solid #c4766e;outline-offset:5px;border-radius:4px}
@media(max-width:650px){
  .compare-toolbar {display:grid;grid-template-columns:auto minmax(0,1fr);gap:3px 10px;margin-bottom:12px}
  .pair-page:has(.players-grid) .compare-toolbar .group-navigation {display:contents}
  .compare-toolbar .group-counter {grid-area:1 / 1}
  .compare-toolbar .group-links {grid-area:2 / 1 / auto / -1}
  .pair-page:has(.players-grid) .compare-toolbar .caption-controls {grid-area:1 / 2}
}
@media(max-width:600px){
  .quality-pair .mobile-side {display:block;margin:0 0 6px;font-size:13px;color:var(--muted)}
  .quality-pair [data-side],.quality-pair .quality-heading,.quality-pair #quality-A,.quality-pair #quality-B {grid-area:auto}
  .quality-pair [data-side="B"] {margin-top:6px}
}