/* NHB disclosure-experiments platform — shared styles.
   Clean, calm, archive-neutral. No third-party CSS. */
:root{
  --ink:#272320; --muted:#73695c; --line:#e8e3d9; --bg:#f5f3ee; --card:#fffdf9;
  --accent:#3c5a8a; --accent-d:#2c4670; --accent-soft:#eef2f8;
  --ok:#2f7d4f; --warn:#b45309; --danger:#b3261e;
  --maxw:760px; --radius:14px;
  --shadow:0 1px 2px rgba(40,32,24,.05),0 10px 30px rgba(40,32,24,.06);
  --shadow-lg:0 4px 12px rgba(40,32,24,.08),0 24px 60px rgba(40,32,24,.10);
  --serif:"Iowan Old Style","Palatino Linotype",Georgia,"Times New Roman",serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:var(--accent)}
::selection{background:rgba(60,90,138,.16)}

/* top progress + brand bar */
.topbar{position:sticky;top:0;z-index:20;background:rgba(255,253,249,.82);backdrop-filter:saturate(140%) blur(8px);-webkit-backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--line)}
.topbar .inner{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:.6rem 1rem;font-size:.85rem;color:var(--muted)}
.topbar .brand{font-weight:600;color:var(--ink);font-family:var(--serif);font-size:1.02rem;letter-spacing:.01em;display:flex;align-items:center;gap:.5rem}
.topbar .brand::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px rgba(60,90,138,.16)}
.step-label{font-size:.76rem;color:var(--muted);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.progress{height:5px;background:#ece8df}
.progress > i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),#6480ab);width:0;transition:width .45s cubic-bezier(.4,0,.2,1)}
.modeflag{font-size:.72rem;padding:.12rem .55rem;border-radius:999px;border:1px solid var(--line)}
.modeflag.preview{background:#fff7ed;color:var(--warn);border-color:#fed7aa}
.modeflag.server{background:#ecfdf5;color:var(--ok);border-color:#a7f3d0}

/* page shell */
.wrap{max-width:var(--maxw);margin:1.7rem auto 6rem;padding:0 1rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.9rem 2rem;margin-bottom:1.2rem}
@media(max-width:560px){.card{padding:1.3rem 1.2rem}}
@keyframes pageIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.page-anim{animation:pageIn .32s cubic-bezier(.4,0,.2,1)}
h1{font-family:var(--serif);font-size:1.65rem;margin:.1rem 0 1rem;letter-spacing:-.01em;line-height:1.25}
h2{font-size:1.18rem;margin:0 0 .85rem;font-weight:650}
.lead{color:var(--muted);font-size:.97rem}
.page-title{font-family:var(--serif);font-size:1.55rem;margin:0 0 .35rem;letter-spacing:-.01em;line-height:1.25}
.page-sub{color:var(--muted);margin:0 0 1.4rem;font-size:.95rem}

/* reading / archive page */
.archive{font-family:var(--serif)}
.archive .work-head{border-bottom:1px solid var(--line);padding-bottom:1rem;margin-bottom:1.2rem}
.archive .work-title{font-size:1.95rem;margin:0 0 .25rem;line-height:1.2;letter-spacing:-.01em}
.archive .byline{font-family:var(--sans);color:var(--muted);font-size:.9rem}
.tagrow{font-family:var(--sans);display:flex;flex-wrap:wrap;gap:.4rem;margin:.8rem 0 0}
.tag{font-size:.78rem;background:#eef2f8;color:var(--accent-d);border:1px solid #dde4ef;border-radius:7px;padding:.18rem .55rem;text-decoration:none;transition:.12s}
.tag:hover{background:#e3eaf5}
.tag.ai{background:#fbeae8;color:#9a2424;border-color:#f0cdc9;font-weight:600}
.story-body{font-size:1.12rem;line-height:1.8;color:#34302a}
.story-body p{margin:0 0 1.05rem}
.story-body>p:first-of-type::first-letter{font-family:var(--serif);font-size:3.1rem;line-height:.8;float:left;padding:.04em .14em 0 0;color:var(--accent)}

/* forms */
.block{margin:0 0 1.6rem}
.block-instr{font-size:.9rem;color:var(--muted);margin:0 0 .8rem}
.qitem{padding:.9rem 0;border-bottom:1px solid #f1f2f5}
.qitem:last-child{border-bottom:0}
.qtext{margin:0 0 .6rem;font-weight:500}
.qtext .req{color:var(--danger)}
.likert{display:flex;gap:.4rem}
.likert label{flex:1 1 0;min-width:0;text-align:center;border:1px solid var(--line);border-radius:10px;
  padding:.5rem .25rem;cursor:pointer;color:var(--muted);background:#fcfcfd;transition:.12s;
  display:flex;flex-direction:column;align-items:center;gap:.22rem}
.likert label:hover{border-color:var(--accent);background:#f4f8fd}
.likert input{position:absolute;opacity:0;width:1px;height:1px}
.likert label.sel{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 2px 8px rgba(60,90,138,.25)}
.likert .num{font-weight:700;font-size:1rem;line-height:1}
.likert label>span:not(.num){font-size:.72rem;line-height:1.15}
.likert label:has(input:focus-visible){outline:2px solid var(--accent);outline-offset:2px}
.scale-anchor{display:flex;justify-content:space-between;font-size:.75rem;color:var(--muted);margin-top:.4rem;padding:0 .15rem}
.choices label{display:flex;align-items:center;gap:.6rem;border:1px solid var(--line);border-radius:10px;padding:.65rem .85rem;margin:.45rem 0;cursor:pointer;transition:.12s}
.choices label:hover{border-color:var(--accent);background:#f8fbfe}
.choices label.sel{border-color:var(--accent);background:#f1f6fc;box-shadow:inset 0 0 0 1px var(--accent)}
.choices label:has(input:focus-visible){outline:2px solid var(--accent);outline-offset:2px}
.choices input{accent-color:var(--accent)}
textarea,input[type=text],input[type=number]{width:100%;padding:.65rem;border:1px solid var(--line);border-radius:8px;font:inherit;font-size:.95rem;transition:.12s}
textarea:focus,input[type=text]:focus,input[type=number]:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(60,90,138,.12)}
textarea{min-height:90px;resize:vertical}
.slider-wrap{display:flex;align-items:center;gap:1rem}
input[type=range]{flex:1;accent-color:var(--accent);height:6px}
.slider-val{font-weight:700;min-width:6rem;text-align:right;color:var(--accent-d)}
.slider-val.muted{color:var(--muted);font-weight:500;font-style:italic}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.45rem;background:var(--accent);color:#fff;border:0;border-radius:10px;padding:.72rem 1.5rem;font:inherit;font-size:1rem;font-weight:550;cursor:pointer;transition:transform .12s ease,background .15s,box-shadow .15s;box-shadow:0 1px 2px rgba(40,32,24,.12)}
.btn:hover{background:var(--accent-d);transform:translateY(-1px);box-shadow:0 5px 16px rgba(60,90,138,.28)}
.btn:active{transform:translateY(0)}
.btn:disabled{background:#cfc9bd;color:#fbfaf7;cursor:not-allowed;box-shadow:none;transform:none}
.btn:focus-visible,.chip:focus-visible,.mini:focus-visible{outline:2px solid var(--accent-d);outline-offset:2px}
.btn.secondary{background:var(--card);color:var(--ink);border:1px solid var(--line);box-shadow:none}
.btn.secondary:hover{border-color:var(--accent);background:#fff;box-shadow:0 2px 8px rgba(40,32,24,.06)}
.btn.big{font-size:1.05rem;padding:.9rem 1.9rem}
.navrow{display:flex;justify-content:space-between;align-items:center;margin-top:1.4rem}
.dwell-note{font-size:.82rem;color:var(--muted)}

/* consent / debrief */
.legal{font-size:.92rem;max-height:none}
.legal h3{font-size:1rem;margin:1.1rem 0 .4rem}
.legal ul{margin:.3rem 0 .6rem;padding-left:1.2rem}
.accept{display:flex;gap:.6rem;align-items:flex-start;margin-top:1rem;padding:.8rem;background:#f8fafc;border:1px solid var(--line);border-radius:8px}
.accept input{margin-top:.25rem}

.notice{padding:.8rem 1rem;border-radius:8px;font-size:.9rem;margin:.8rem 0}
.notice.warn{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412}
.notice.info{background:#eff6ff;border:1px solid #bfdbfe;color:#1e40af}

/* event inspector (preview / debug) */
#inspector{position:fixed;bottom:0;left:0;right:0;z-index:50;font-family:ui-monospace,monospace}
#inspector .tab{position:absolute;right:1rem;top:-30px;background:#14213d;color:#fff;border:0;border-radius:8px 8px 0 0;padding:.35rem .8rem;font-size:.78rem;cursor:pointer}
#inspector .panel{background:#0f1426;color:#cfe;max-height:0;overflow:auto;transition:max-height .25s ease}
#inspector.open .panel{max-height:42vh}
#inspector .panel .head{position:sticky;top:0;background:#0f1426;display:flex;justify-content:space-between;padding:.5rem .8rem;border-bottom:1px solid #29304a;color:#9fb}
#inspector .panel .head button{background:#23305a;color:#fff;border:0;border-radius:6px;padding:.25rem .6rem;font-size:.72rem;cursor:pointer;margin-left:.4rem}
#inspector .row{padding:.18rem .8rem;border-bottom:1px solid #161c33;font-size:.74rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#inspector .row .t{color:#6cf}
#inspector .row .ty{color:#fd8}

.center{max-width:560px;margin:9vh auto;text-align:center;padding:0 1rem}
.center .big{font-size:1.55rem;margin-bottom:.7rem;font-family:var(--serif)}
.check-circle{width:64px;height:64px;border-radius:50%;background:var(--ok);color:#fff;display:flex;align-items:center;justify-content:center;font-size:2rem;margin:0 auto 1.1rem;box-shadow:0 10px 26px rgba(47,125,79,.32);animation:pop .45s cubic-bezier(.2,1.4,.4,1)}
@keyframes pop{from{transform:scale(.6);opacity:0}to{transform:scale(1);opacity:1}}
.code{font-family:ui-monospace,monospace;font-size:1.3rem;background:var(--accent-soft);border:1px dashed var(--accent);color:var(--accent-d);border-radius:10px;padding:.6rem 1.1rem;display:inline-block;margin:.6rem 0;letter-spacing:.04em}
.muted{color:var(--muted)}
.kbd{font-family:ui-monospace,monospace;background:#eef0f4;border:1px solid var(--line);border-radius:5px;padding:.05rem .35rem;font-size:.85em}
.err{color:var(--danger);font-size:.85rem;margin-top:.4rem}

/* ---------- Study 4: gallery ---------- */
.gwrap{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:1rem 0}
@media(max-width:640px){.gwrap{grid-template-columns:1fr}}
.gpiece{border:1px solid var(--line);border-radius:12px;padding:1rem 1.1rem;background:var(--card);position:relative;transition:transform .15s,box-shadow .15s}
.gpiece:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.gtitle{font-weight:600;font-family:var(--serif);font-size:1.05rem}
.gauthor{color:var(--muted);font-size:.82rem;margin:.1rem 0 .5rem}
.gbody{font-family:var(--serif);font-size:.92rem;line-height:1.5;color:#33384a;position:relative;max-height:7.5em;overflow:hidden}
.gbody.full{max-height:none}
.gbody:not(.full)::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2.2em;background:linear-gradient(rgba(255,255,255,0),#fff)}
.gbody p{margin:0 0 .5rem}
.glikes{color:#c2557a;font-size:.83rem;margin-top:.6rem;font-weight:600}
.gtarget{border-color:var(--accent);box-shadow:0 0 0 1px rgba(60,90,138,.35)}
.rate-tag{display:inline-block;background:#eef3fb;color:var(--accent-d);border-radius:6px;font-size:.7rem;font-weight:700;padding:.12rem .5rem;margin-bottom:.45rem}
.ailabel{color:#9a2424;font-weight:600}
.gbadge-row{margin-bottom:.45rem}
.vbadge{display:inline-block;background:#e6f7ec;color:var(--ok);border:1px solid #a7f3d0;border-radius:999px;font-size:.68rem;padding:.14rem .55rem;font-weight:700;letter-spacing:.01em}
.showcase{border:1px solid #cfe6d6;background:#f4fbf6;border-radius:12px;padding:.8rem 1rem;margin:.8rem 0}
.showcase-h{color:var(--ok);font-weight:700;font-size:.9rem;margin-bottom:.4rem}

/* ---------- Study 4: editor + assistant ---------- */
.editor-grid{display:grid;grid-template-columns:1fr 320px;gap:1.1rem;margin-top:1rem}
@media(max-width:760px){.editor-grid{grid-template-columns:1fr}}
.editor-col textarea#draft{min-height:400px;font-family:var(--serif);font-size:1.05rem;line-height:1.7}
.ed-status{display:flex;justify-content:space-between;font-size:.8rem;color:var(--muted);margin-top:.4rem}
.assist{border:1px solid var(--line);border-radius:12px;background:#fbfcfe;display:flex;flex-direction:column;overflow:hidden;height:fit-content}
.assist-h{display:flex;justify-content:space-between;align-items:center;background:#eef3fb;padding:.55rem .8rem;font-weight:600;font-size:.9rem;color:var(--accent-d)}
.assist-body{padding:.7rem .8rem}
.assist-btns{display:flex;flex-direction:column;gap:.4rem;margin:.5rem 0}
.chip{text-align:left;background:#fff;border:1px solid var(--line);border-radius:8px;padding:.5rem .65rem;font:inherit;font-size:.85rem;cursor:pointer;transition:.12s}
.chip:hover{border-color:var(--accent);background:var(--accent-soft)}
.assist-ask{display:flex;gap:.35rem;margin:.4rem 0}
.assist-ask input{flex:1;font-size:.85rem;padding:.4rem}
.mini{background:var(--accent);color:#fff;border:0;border-radius:7px;padding:.35rem .6rem;font-size:.78rem;cursor:pointer}
.mini:hover{background:var(--accent-d)}
.aresp{border:1px solid #d9e6f6;background:#fff;border-radius:9px;padding:.55rem .65rem;margin:.5rem 0}
.atext{font-family:var(--serif);font-size:.92rem;line-height:1.5;margin-bottom:.45rem}
.aacts{display:flex;gap:.35rem}
.piece-preview{border:1px solid var(--line);border-radius:10px;margin:.4rem 0 1rem;overflow:hidden}
.pp-h{background:#f4f6f9;padding:.45rem .8rem;font-size:.82rem;color:var(--muted);font-weight:600}
.pp-body{padding:.8rem;font-family:var(--serif);font-size:1rem;line-height:1.6;max-height:240px;overflow:auto}
.spinner{width:34px;height:34px;border:4px solid #dfe5ef;border-top-color:var(--accent);border-radius:50%;margin:0 auto;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}