:root{--ink:#18212b;--muted:#697581;--line:#dfe5e9;--paper:#fff;--bg:#f4f7f8;--accent:#176b63;--accent-soft:#e8f3f0;--warm:#c97940;--shadow:0 12px 32px #1e29370b;--radius:16px}*{box-sizing:border-box}html{background:var(--bg)}body{margin:0;color:var(--ink);font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.5}.shell{min-height:100vh}.topbar{height:72px;background:#fff;border-bottom:1px solid var(--line);padding:0 max(24px,calc((100vw - 1240px)/2));display:flex;align-items:center;justify-content:space-between}.brand{display:flex;gap:12px;align-items:center}.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--ink);color:#fff;font-size:13px;font-weight:800;letter-spacing:-.05em}.brand strong{display:block;font-size:15px;letter-spacing:.02em}.brand span:not(.brand-mark){display:block;color:var(--muted);font-size:11px;margin-top:1px}.save-state{color:var(--muted);font-size:12px;display:flex;gap:7px;align-items:center}.save-dot{width:7px;height:7px;border-radius:99px;background:#48a28e}.main{max-width:1240px;margin:0 auto;padding:42px 24px 70px}.intro{max-width:760px;margin:0 auto 30px}.eyebrow{font-size:11px;letter-spacing:.16em;color:var(--accent);font-weight:800;text-transform:uppercase}.intro h1{font-size:clamp(29px,4vw,48px);line-height:1.08;letter-spacing:-.045em;margin:10px 0 13px}.intro p{color:var(--muted);margin:0;max-width:650px}.panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.intro-panel{padding:30px}.intro-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;margin-top:28px}.note{background:#f8faf9;border-radius:13px;padding:20px}.note h3{font-size:13px;margin:0 0 9px}.note p,.note li{font-size:13px;color:var(--muted)}.note ul{padding-left:18px;margin:0}.data-status{padding:18px;border:1px solid #eddccf;background:#fffaf6;border-radius:12px;display:flex;gap:12px;align-items:flex-start}.status-icon{font-size:20px}.data-status h3{margin:0 0 4px;font-size:14px}.data-status p{margin:0;color:var(--muted);font-size:12px}.button-row{display:flex;gap:10px;margin-top:27px;align-items:center}.btn{appearance:none;border:0;border-radius:10px;padding:11px 17px;font:inherit;font-size:13px;font-weight:750;cursor:pointer;transition:.18s ease}.btn:focus-visible,.choice:focus-visible,.tab:focus-visible,.zoom-btn:focus-visible{outline:3px solid #9bd4ca;outline-offset:2px}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:#0e574f;transform:translateY(-1px)}.btn-secondary{background:#eef2f3;color:var(--ink)}.btn-secondary:hover{background:#e2e9ea}.btn:disabled{opacity:.42;cursor:not-allowed;transform:none}.progress-row{display:flex;align-items:center;justify-content:space-between;margin:0 0 14px}.progress-meta{font-size:13px;color:var(--muted)}.progress-meta strong{color:var(--ink)}.progress-track{height:6px;border-radius:99px;background:#e6ecee;overflow:hidden}.progress-fill{height:100%;background:var(--accent);border-radius:99px;transition:width .25s}.study-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:18px}.study-head h1{font-size:27px;letter-spacing:-.035em;margin:4px 0 0}.overview-link{font-size:12px;color:var(--accent);cursor:pointer;text-decoration:underline}.refs{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:18px 0}.ref-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:13px}.ref-label{display:flex;justify-content:space-between;align-items:center;font-size:12px;font-weight:750;margin-bottom:10px}.ref-label span{color:var(--muted);font-weight:500}.ref-img{width:100%;aspect-ratio:16/9;object-fit:contain;background:#f1f4f4;border-radius:10px;display:block}.ref-empty{display:grid;place-items:center;color:var(--muted);font-size:12px;aspect-ratio:16/9;background:#f1f4f4;border-radius:10px}.criterion-bar{display:flex;align-items:center;gap:15px;padding:14px 16px;background:#ecf4f1;border-radius:13px;margin:18px 0}.criterion-copy{flex:1}.criterion-copy strong{display:block;font-size:14px}.criterion-copy span{color:var(--muted);font-size:11px}.tabs{display:flex;gap:6px}.tab{border:1px solid transparent;background:transparent;border-radius:8px;padding:8px 11px;font:inherit;font-size:12px;color:var(--muted);cursor:pointer}.tab.active{background:#fff;color:var(--accent);border-color:#c9dfda;box-shadow:0 2px 7px #26796b16;font-weight:750}.candidates{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px}.candidate{position:relative;border:1px solid var(--line);border-radius:13px;padding:8px;background:#fff;min-width:0;transition:.18s;border-top:3px solid transparent}.candidate.selected{border-color:#72b8ab;border-top-color:var(--accent);background:#f8fcfb;box-shadow:0 5px 16px #176b6315}.candidate-img{width:100%;aspect-ratio:1/1;object-fit:contain;background:#f3f5f5;border-radius:8px;display:block}.choice{display:block;cursor:pointer}.choice input{position:absolute;opacity:0;pointer-events:none}.candidate-footer{display:flex;align-items:center;justify-content:space-between;gap:5px;padding:8px 2px 1px}.letter{font-size:13px;font-weight:800}.selected-mark{font-size:11px;color:var(--accent);font-weight:700}.zoom-btn{font:inherit;font-size:11px;border:0;background:transparent;color:var(--muted);cursor:pointer;padding:3px}.zoom-btn:hover{color:var(--accent)}.criterion-summary{color:var(--muted);font-size:12px;margin:15px 0 0}.criterion-summary strong{color:var(--ink)}.nav-row{display:flex;justify-content:space-between;align-items:center;margin-top:23px}.kbd-hint{color:var(--muted);font-size:11px}.overview-panel{padding:25px}.overview-panel h2{font-size:20px;margin:0 0 8px}.overview-panel p{color:var(--muted);font-size:13px}.trial-list{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin:22px 0}.trial-cell{border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px;text-align:center;font-size:12px;cursor:pointer}.trial-cell.current{border-color:var(--accent);color:var(--accent);font-weight:800}.trial-cell.done{background:var(--accent-soft);border-color:#b9ddd4}.done-panel{text-align:center;padding:44px 26px}.done-panel h1{margin:0 0 9px}.done-panel p{color:var(--muted);max-width:570px;margin:0 auto}.export-row{display:flex;justify-content:center;gap:10px;margin-top:26px}.lightbox{position:fixed;inset:0;background:#152129d9;z-index:10;display:grid;place-items:center;padding:20px}.lightbox[hidden]{display:none}.lightbox-card{max-width:min(760px,96vw);max-height:92vh;background:#fff;border-radius:15px;padding:13px;position:relative}.lightbox-img{display:block;max-width:100%;max-height:80vh;width:auto;height:auto;object-fit:contain;background:#f2f4f4;border-radius:9px}.lightbox-close{position:absolute;right:10px;top:8px;border:0;border-radius:50%;width:31px;height:31px;background:#fff;color:var(--ink);cursor:pointer;font-size:20px;line-height:1}.lightbox-caption{font-size:12px;color:var(--muted);padding:9px 2px 0}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:780px){.topbar{padding:0 16px}.main{padding:27px 15px 50px}.intro-grid{grid-template-columns:1fr}.intro-panel{padding:22px}.refs{gap:9px}.criterion-bar{align-items:flex-start;flex-direction:column;gap:9px}.tabs{width:100%;justify-content:space-between}.tab{flex:1}.candidates{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.trial-list{grid-template-columns:repeat(4,1fr)}.study-head{align-items:flex-start;gap:10px;flex-direction:column}}@media(max-width:420px){.brand span:not(.brand-mark){display:none}.save-state{font-size:11px}.refs{grid-template-columns:1fr 1fr}.ref-card{padding:8px}.study-head h1{font-size:23px}.nav-row{gap:10px}.kbd-hint{display:none}}
/* compact source references */
.ref-img,.ref-empty{width:min(160px,100%);aspect-ratio:1;margin-left:auto;margin-right:auto}

.criterion-copy .multi-label{display:inline-block;margin-left:6px;padding:1px 7px;border-radius:5px;background:#d8ebe6;color:#176b63;font-size:11px;font-weight:700;vertical-align:middle}.select-all-btn{white-space:nowrap;border:1px solid #b8d6ce;background:#fff;color:#176b63}.select-all-btn:hover{background:#dcefe9}

/* Both saved criteria remain visible while the active checkbox edits only one. */
.candidate{border:2px solid var(--line);box-shadow:none}
.candidate.has-content{border-color:#d64242;background:#fff9f9}
.candidate.has-style{border-color:#188660;background:#f7fcf9}
.candidate.has-content.has-style{border-color:#d64242;box-shadow:inset 0 0 0 3px #188660;background:#fff}
.selected-mark{display:flex;align-items:center;gap:4px}
.content-mark,.style-mark{padding:1px 5px;border-radius:4px;font-size:11px}
.content-mark{color:#b82d2d;background:#ffe8e8}
.style-mark{color:#116846;background:#e1f4eb}
.tab.active[data-criterion="content"]{color:#b82d2d;border-color:#e9b6b6;background:#fff4f4}
.tab.active[data-criterion="style"]{color:#116846;border-color:#a9d7c5;background:#f2fbf6}

.topbar{position:sticky;top:0;z-index:5}.top-actions{display:flex;align-items:center;gap:14px}.home-btn{white-space:nowrap}@media(max-width:520px){.top-actions{gap:8px}.top-actions .save-state{font-size:10px}.home-btn{padding:8px 10px;font-size:12px}}

.admin-entry{font-size:12px;color:#697581;margin-left:auto;white-space:nowrap}.button-row{flex-wrap:wrap}.save-state[data-backend="offline"]{color:#8e6a27}.save-state[data-backend="deleted"]{color:#b53942}

/* Touch layouts keep the references and next action within easy reach. */
[hidden]{display:none!important}
.mobile-nav-status,.touch-zoom-hint{display:none}
.reference-zoom{display:block;position:relative;width:100%;padding:0;border:0;background:transparent;color:inherit;cursor:zoom-in;border-radius:10px}
.reference-zoom:focus-visible,.candidate:focus-within{outline:3px solid #84c6b9;outline-offset:3px}
.ref-zoom-hint{position:absolute;bottom:5px;right:5px;padding:2px 6px;border-radius:5px;background:#ffffffed;color:var(--muted);font-size:10px;pointer-events:none}
.lightbox-open{overflow:hidden}
.lightbox-close{width:44px;height:44px;right:8px;top:8px;box-shadow:0 2px 10px #18212b20;z-index:1}
.choice,.zoom-btn,.btn,.tab,.trial-cell,.overview-link{-webkit-tap-highlight-color:transparent;touch-action:manipulation}
.candidate.is-current-choice::after{content:'✓';position:absolute;right:13px;top:13px;width:24px;height:24px;display:grid;place-items:center;border-radius:50%;background:var(--accent);color:white;font-size:14px;font-weight:800;pointer-events:none;box-shadow:0 2px 8px #18212b20}
.main[data-criterion="content"] .candidate.is-current-choice::after{background:#b82d2d}
@media(max-width:780px){
  :root{--mobile-header-height:81px}
  html{scroll-padding-top:240px}
  body{overscroll-behavior-y:none}
  .topbar{height:auto;min-height:var(--mobile-header-height);display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px 10px;padding:10px 16px}
  .brand{grid-column:1;grid-row:1;gap:9px;min-width:0}
  .brand-mark{width:32px;height:32px;border-radius:10px;flex-shrink:0}
  .brand strong{font-size:14px}
  .brand span:not(.brand-mark){display:block;font-size:10px}
  .top-actions{display:contents}
  .top-actions .home-btn{grid-column:2;grid-row:1;min-height:40px;padding:8px 12px;font-size:12px}
  .top-actions .save-state{grid-column:1/-1;grid-row:2;min-height:16px;font-size:11px;line-height:16px;overflow-wrap:anywhere}
  .main{padding:20px 14px max(30px,env(safe-area-inset-bottom));min-width:0;overflow-anchor:none}
  .main:has(.nav-row){padding-bottom:calc(136px + env(safe-area-inset-bottom))}
  .intro-panel{padding:24px 18px}
  .intro h1{font-size:32px;line-height:1.2;letter-spacing:-.04em}
  .intro p{font-size:14px;line-height:1.8}
  .intro-grid{gap:12px;margin-top:22px}
  .note{padding:17px}
  .data-status{padding:12px;gap:8px}
  .button-row{display:grid;grid-template-columns:1fr;gap:10px;margin-top:22px}
  .button-row .btn{width:100%;min-height:48px}
  .admin-entry{margin:6px 0 0;text-align:center;min-height:44px;display:grid;place-items:center}
  .progress-row{gap:8px;margin-bottom:8px}
  .progress-meta{font-size:12px}
  .overview-link{border:0;background:transparent;padding:8px 0 8px 10px;min-height:44px;white-space:nowrap;font:inherit;font-size:12px}
  .study-head{display:none}
  .refs{position:sticky;top:var(--mobile-header-height);z-index:4;margin:12px -4px 14px;padding:8px 4px;background:var(--bg);gap:10px;border-bottom:1px solid var(--line);box-shadow:0 8px 12px #f4f7f8cc}
  .ref-card{padding:8px;border-radius:12px;min-width:0}
  .ref-label{font-size:12px;margin-bottom:6px;line-height:18px}
  .ref-label span{display:none}
  .ref-img,.ref-empty{width:min(112px,100%);height:clamp(84px,25vw,112px);aspect-ratio:auto;object-fit:contain}
  .ref-zoom-hint{font-size:9px;bottom:3px;right:3px}
  .criterion-bar{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px 8px;padding:14px;margin:0 0 14px}
  .criterion-copy{grid-column:1/-1}
  .criterion-copy strong{font-size:15px}
  .criterion-copy strong>span:last-child:not(.multi-label){display:none}
  .criterion-copy>span{display:block;margin-top:4px;font-size:12px}
  .tabs{gap:4px;min-width:0;justify-content:stretch}
  .tab{min-height:44px;padding:9px 6px;font-size:12px;white-space:nowrap}
  .select-all-btn{min-height:44px;padding:8px 10px;font-size:12px}
  .candidates{gap:12px 10px}
  .candidate{padding:6px;border-radius:12px}
  .candidate-img{border-radius:7px}
  .candidate-footer{min-height:34px;padding:6px 2px 2px}
  .letter{font-size:15px}
  .selected-mark{gap:3px;flex-wrap:wrap;justify-content:flex-end}
  .content-mark,.style-mark{font-size:10px;padding:2px 4px}
  .zoom-btn{display:block;width:100%;min-height:44px;padding:10px 4px;border-top:1px solid var(--line);margin-top:4px;color:var(--accent);font-size:12px}
  .candidate.is-current-choice::after{top:11px;right:11px}
  .criterion-summary{font-size:12px;line-height:1.8;margin-top:16px}
  .nav-row{position:fixed;z-index:6;bottom:0;left:0;right:0;margin:0;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.6fr);gap:8px 10px;padding:10px 16px calc(12px + env(safe-area-inset-bottom));background:#fffffff5;border-top:1px solid var(--line);box-shadow:0 -8px 24px #18212b0b;backdrop-filter:blur(12px)}
  .mobile-nav-status{grid-column:1/-1;display:flex;justify-content:space-between;gap:8px;font-size:12px;color:var(--muted);line-height:20px}
  .mobile-nav-status strong{color:var(--accent);font-weight:700}
  .nav-row .btn{min-height:48px;font-size:14px;padding:11px 12px}
  .trial-list{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
  .trial-cell{min-height:54px;font:inherit;font-size:12px;padding:7px 4px}
  .overview-panel{padding:20px 16px}
  .done-panel{padding:46px 20px}
  .done-panel h1{font-size:27px;line-height:1.3;margin:12px 0}
  .done-panel p{font-size:14px;line-height:1.8;overflow-wrap:anywhere}
  .lightbox{z-index:20;padding:12px;padding-bottom:max(12px,env(safe-area-inset-bottom))}
  .lightbox-card{width:100%;max-width:600px;max-height:calc(100dvh - 28px);padding:10px;border-radius:14px}
  .lightbox-img{width:100%;max-height:calc(100dvh - 130px);border-radius:8px;touch-action:auto}
  .lightbox-caption{font-size:13px;padding:12px 4px 2px}
  .touch-zoom-hint{display:block;font-size:11px;margin-top:3px;color:var(--muted)}
  .kbd-hint{display:none}
}
@media(max-width:359px){
  .main{padding-left:10px;padding-right:10px}
  .brand strong{font-size:13px}
  .brand span:not(.brand-mark){font-size:9px}
  .criterion-bar{padding:10px;gap:10px 6px}
  .tab{font-size:11px;padding-left:4px;padding-right:4px}
  .select-all-btn{font-size:11px;padding:8px}
  .intro h1{font-size:28px}
}
@media(max-width:780px) and (max-height:650px){
  .main{padding-top:8px}
  .progress-row{margin-bottom:4px}
  .overview-link{min-height:36px;padding-top:4px;padding-bottom:4px}
  .refs{margin-top:8px;margin-bottom:10px;padding-top:6px;padding-bottom:6px}
  .ref-img,.ref-empty{width:72px;height:72px}
  .criterion-bar{padding:10px;gap:8px;margin-bottom:10px}
  .criterion-copy>span{display:none}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;scroll-behavior:auto!important}}