:root{
  --bg:#f5f3ee; --panel:#fff; --ink:#2b2b2b; --muted:#7a756c; --line:#e6e1d8;
  --accent:#c4663b; --accent2:#3b7a6f; --g:#3fa45b; --y:#d9a52a; --o:#e07a2a; --r:#cf4646; --w:#9a958c;
  --radius:14px; --shadow:0 1px 3px rgba(0,0,0,.06),0 8px 24px rgba(0,0,0,.05);
}
*{box-sizing:border-box}
body{margin:0;font-family:Georgia,"Times New Roman",serif;background:var(--bg);color:var(--ink);}
.muted{color:var(--muted)}
h1{font-size:1.6rem;margin:.2rem 0 1rem}
h2{font-size:1.25rem;margin:.2rem 0}
button{font-family:inherit;cursor:pointer}

/* topbar */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.7rem 1.4rem;background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.brand{font-weight:bold;font-size:1.05rem}
.brand span{color:var(--muted);font-weight:normal;font-size:.85rem}
.stagenav{display:flex;align-items:center;gap:1rem}
.home{background:none;border:1px solid var(--line);border-radius:999px;padding:.4rem .9rem;color:var(--ink)}
.home:hover{border-color:var(--accent);color:var(--accent)}
.steps{display:flex;gap:.4rem;list-style:none;margin:0;padding:0}
.steps li{padding:.4rem .8rem;border-radius:999px;font-size:.85rem;color:var(--muted);cursor:pointer;border:1px solid transparent}
.steps li.active{background:var(--accent);color:#fff}
.steps li:not(.active):hover{border-color:var(--line)}

main{max-width:1200px;margin:0 auto;padding:1.4rem}
.stage{display:none}
.stage.active{display:block;animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1}}

/* stage 1 */
.card-intro{max-width:520px;margin:3rem auto;background:var(--panel);padding:2rem;border-radius:var(--radius);box-shadow:var(--shadow)}
.card-intro label{display:block;margin:1rem 0 .3rem;font-size:.95rem}
.card-intro input{width:100%;padding:.7rem .9rem;border:1px solid var(--line);border-radius:10px;font-size:1rem;font-family:inherit;background:#fbfaf7}
.primary{background:var(--accent);color:#fff;border:none;border-radius:10px;padding:.75rem 1.2rem;font-size:1rem;margin-top:1.3rem}
.primary:hover{filter:brightness(1.05)}
.ghost{background:none;border:1px solid var(--line);border-radius:10px;padding:.6rem 1rem;color:var(--ink)}
.ghost:hover{border-color:var(--accent)}
.hint{color:var(--r);font-size:.9rem;min-height:1.2em}

/* stage 2 */
.diag-grid{display:grid;grid-template-columns:260px 1fr;gap:1.2rem}
.diag-side{background:var(--panel);border-radius:var(--radius);box-shadow:var(--shadow);padding:1rem;height:fit-content;position:sticky;top:80px}
.who{display:flex;flex-direction:column;border-bottom:1px solid var(--line);padding-bottom:.6rem;margin-bottom:.6rem}
.who span{color:var(--muted);font-size:.85rem}
.progress{font-size:.9rem;color:var(--accent2);margin-bottom:.6rem}
.log{list-style:none;margin:0;padding:0;max-height:46vh;overflow:auto;font-size:.82rem}
.log li{padding:.35rem 0;border-bottom:1px dashed var(--line);display:flex;gap:.4rem;align-items:baseline}
.log .dot{width:.7rem;height:.7rem;border-radius:50%;flex:none;margin-top:.25rem}
.finishBtn{margin-top:.8rem}
#finishBtn{margin-top:.8rem;width:100%}

.diag-main{display:grid;gap:1.1rem}
.cardbox{display:grid;grid-template-columns:300px 1fr;gap:1.2rem;background:var(--panel);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.1rem}
.cardimg{background:#fbfaf7;border:1px solid var(--line);border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden;min-height:240px}
.cardimg img{max-width:100%;max-height:340px;display:block}
.tag{display:inline-block;background:var(--accent2);color:#fff;border-radius:999px;padding:.2rem .7rem;font-size:.8rem}
.setup,.say,.watch{margin:.5rem 0;font-size:.95rem;line-height:1.45}
.say b{color:var(--accent)}

.record{background:var(--panel);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.1rem;display:grid;gap:.7rem}
.optgroup h4{margin:.2rem 0 .4rem;font-size:.9rem;color:var(--muted);font-weight:normal;text-transform:uppercase;letter-spacing:.03em}
.opts{display:flex;flex-wrap:wrap;gap:.45rem}
.opt{border:1px solid var(--line);background:#fbfaf7;border-radius:999px;padding:.45rem .85rem;font-size:.9rem;color:var(--ink)}
.opt:hover{border-color:var(--accent)}
.opt.sel{background:var(--accent);color:#fff;border-color:var(--accent)}
.opts.multi .opt.sel{background:var(--accent2);border-color:var(--accent2)}
.note{display:flex;flex-direction:column;font-size:.85rem;color:var(--muted)}
.note input{margin-top:.25rem;padding:.55rem .8rem;border:1px solid var(--line);border-radius:10px;font-family:inherit;background:#fbfaf7}
.recbtns{display:flex;gap:.6rem;align-items:center}

/* stage 3 */
.concl-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:1.2rem}
.protocol,.result{background:var(--panel);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.2rem}
#protocolTable table{width:100%;border-collapse:collapse;font-size:.82rem;margin-bottom:1rem}
#protocolTable th,#protocolTable td{border-bottom:1px solid var(--line);padding:.4rem .3rem;text-align:left;vertical-align:top}
#protocolTable th{color:var(--muted);font-weight:normal}
.md{line-height:1.55}
.md h1,.md h2,.md h3{margin:1rem 0 .4rem}
.md ul{margin:.3rem 0 .6rem 1.1rem}
.md p{margin:.4rem 0}
.ragpages{font-size:.8rem;margin-top:.8rem}
.spinner{display:inline-block;width:1em;height:1em;border:2px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;vertical-align:-2px}
@keyframes spin{to{transform:rotate(360deg)}}

/* алгоритм + дерево */
.algo{font-size:.8rem;line-height:1.4;color:var(--muted);background:#fbfaf7;border:1px solid var(--line);border-radius:10px;padding:.55rem .6rem;margin-bottom:.6rem}
.algo b{color:var(--ink)}
.tree{display:grid;gap:.3rem;max-height:48vh;overflow:auto;margin-bottom:.7rem}
.tnode{display:flex;align-items:center;gap:.5rem;padding:.4rem .5rem;border-radius:9px;border:1px solid transparent;font-size:.85rem}
.tnode.cur{background:#fff3ec;border-color:var(--accent)}
.tnode.done{opacity:.85}
.tnum{flex:none;width:1.4rem;height:1.4rem;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.72rem;background:#eee7dc;color:var(--muted)}
.tnode.cur .tnum{background:var(--accent);color:#fff}
.tnode.done .tnum{background:var(--g);color:#fff}
.tdom{flex:1;min-width:0}
.tdom small{display:block;color:var(--muted);font-size:.7rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tdots{display:flex;gap:3px}
.tdots i{width:8px;height:8px;border-radius:50%;background:#d8d1c4}
.tdots i.d{background:var(--g)}
.tdots i.c{background:var(--accent);box-shadow:0 0 0 2px #fff3ec}
.sidebtns{display:grid;gap:.4rem}
.sidebtns button{width:100%}

/* сохранённые сессии */
.saved-wrap{max-width:520px;margin:1rem auto;background:var(--panel);padding:1.2rem 2rem 1.6rem;border-radius:var(--radius);box-shadow:var(--shadow)}
.saved{list-style:none;margin:.5rem 0 0;padding:0;display:grid;gap:.5rem}
.saved li{display:flex;align-items:center;gap:.6rem;border:1px solid var(--line);border-radius:10px;padding:.6rem .8rem;background:#fbfaf7}
.saved .si{flex:1;min-width:0}
.saved .si b{display:block}
.saved .si small{color:var(--muted)}
.saved .bar{height:5px;background:#eee7dc;border-radius:3px;margin-top:.35rem;overflow:hidden}
.saved .bar i{display:block;height:100%;background:var(--accent2)}
.saved button{border:1px solid var(--line);background:#fff;border-radius:8px;padding:.35rem .7rem;font-size:.82rem}
.saved button.cont{border-color:var(--accent);color:var(--accent)}
.saved button.del{color:var(--r)}

@media(max-width:900px){
  .diag-grid,.cardbox,.concl-grid{grid-template-columns:1fr}
  .diag-side{position:static}
}