:root{
  --bg:#f4f5f2; --surface:#ffffff; --ink:#1d2640; --muted:#5b6377; --line:#dde0e5; --chip:#eceef1;
  --accent:#b8321f; --accent-ink:#ffffff;
  --c-verb:#c2412d; --c-noun:#2f6fb0; --c-det:#7a4fb5; --c-adj:#2e8a57; --c-neg:#5f6675; --c-subj:#8a90a0;
  --c-trig:#9a6a12;
  --flash:#fde7a8; --warn:#9a6700; --warn-bg:#fff4d6;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#131722; --surface:#1b202d; --ink:#eceef4; --muted:#a2aabc; --line:#2c3344; --chip:#262c3b;
    --accent:#f0765f; --accent-ink:#1b1f2a;
    --c-verb:#f0876f; --c-noun:#6fa8e8; --c-det:#b391e8; --c-adj:#62c48d; --c-neg:#a7aebd; --c-subj:#8990a2;
    --c-trig:#e3b455;
    --flash:#5a4a1c; --warn:#f1bd4a; --warn-bg:#3a3120;
  }
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font:16px/1.5 Figtree,system-ui,-apple-system,"Segoe UI",sans-serif;padding-inline:16px;padding-block:18px 48px;-webkit-font-smoothing:antialiased}
button,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.top{max-width:1320px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.brand{font-family:"Young Serif",Georgia,serif;font-size:1.3rem;color:var(--ink);text-decoration:none}
.brand span{color:var(--accent)}
.tabs{display:flex;gap:4px;background:var(--chip);padding:4px;border-radius:999px}
.tabs a{padding:6px 14px;border-radius:999px;text-decoration:none;color:var(--ink);font-size:.9rem;font-weight:600}
.tabs a[aria-current="page"]{background:var(--surface);box-shadow:0 1px 2px rgba(0,0,0,.08)}
.intro{max-width:1320px;margin:10px auto 16px;color:var(--muted)}

.board{position:relative;max-width:1320px;margin:0 auto;display:grid;gap:26px 40px;
  grid-template-columns:minmax(170px,210px) minmax(0,1fr) minmax(150px,180px);
  grid-template-areas:"tense tense tense" "person center right" "det adj neg" "trigger trigger trigger"}
.strings{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible;z-index:1}
.strings path{fill:none;stroke-width:2.5;stroke-linecap:round;opacity:.85}
.strings path.dragging{stroke-width:3.5;opacity:1}

.group{position:relative;z-index:2}
.group h2{margin:0 0 8px;font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:700}
.group h2 small{letter-spacing:0;text-transform:none;font-weight:500;margin-left:4px}
.g-tense{grid-area:tense;text-align:center}
.g-person{grid-area:person;align-self:center}
.g-right{grid-area:right;align-self:center;display:flex;flex-direction:column;gap:22px}
.g-det{grid-area:det}.g-adj{grid-area:adj;text-align:center}.g-neg{grid-area:neg}
.g-trigger{grid-area:trigger;display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center}
.g-trigger h2{margin:0}
.substations{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:center}
.substations[hidden]{display:none}
.substations > span{font-size:.7rem;font-weight:700;color:var(--muted);letter-spacing:.1em;text-transform:uppercase}
.substations > div{display:flex;gap:4px;flex-wrap:wrap}
.st2{background:transparent;border:1px solid var(--line);border-radius:999px;padding:3px 10px;font-size:.8rem;cursor:pointer;color:var(--muted)}
.st2:hover{border-color:var(--c-trig)}
.st2.on{background:var(--c-trig);border-color:var(--c-trig);color:#fff;font-weight:600}
.st:disabled{opacity:.4;cursor:default}
.g-det,.g-adj,.g-neg{display:flex;flex-direction:column-reverse;gap:8px}
.g-det h2,.g-adj h2,.g-neg h2{margin:0}
.g-adj{align-items:center}
.stations{display:flex;flex-wrap:wrap;gap:6px}
.g-adj .stations,.g-tense .stations{justify-content:center}
.stations.col{flex-direction:column;align-items:stretch}
.tense-stations{gap:18px}
.tgroup{display:flex;flex-direction:column;gap:6px;align-items:center}
.tgroup > span{font-size:.7rem;font-weight:700;color:var(--muted);letter-spacing:.1em;text-transform:uppercase}
.tgroup > div{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}

.st{--c:var(--muted);background:var(--surface);border:1.5px solid var(--line);border-radius:999px;padding:6px 12px;cursor:pointer;font-size:.88rem;line-height:1.2;text-align:center;transition:background .15s,border-color .15s,color .15s}
.st:hover{border-color:var(--c)}
.st.on{background:var(--c);border-color:var(--c);color:#fff;font-weight:600}
.st.near{border-color:var(--c);box-shadow:0 0 0 3px color-mix(in srgb,var(--c) 25%,transparent)}
.st small{display:block;font-size:.72rem;opacity:.75;font-weight:500}
[data-color="trig"]{--c:var(--c-trig)}
[data-color="verb"]{--c:var(--c-verb)}[data-color="noun"]{--c:var(--c-noun)}[data-color="det"]{--c:var(--c-det)}[data-color="adj"]{--c:var(--c-adj)}[data-color="neg"]{--c:var(--c-neg)}
[data-color] .st{--c:inherit}
.group[data-color="verb"] .st{--c:var(--c-verb)}.group[data-color="noun"] .st{--c:var(--c-noun)}.group[data-color="det"] .st{--c:var(--c-det)}.group[data-color="adj"] .st{--c:var(--c-adj)}.group[data-color="neg"] .st{--c:var(--c-neg)}.group[data-color="trig"] .st{--c:var(--c-trig)}
@media (prefers-color-scheme: dark){.st.on,.st2.on{color:#141824}}

.knob{position:absolute;z-index:4;width:20px;height:20px;margin:-10px 0 0 -10px;border-radius:50%;background:var(--c);border:3px solid var(--surface);box-shadow:0 1px 4px rgba(0,0,0,.3);cursor:grab;touch-action:none;transition:left .25s ease,top .25s ease}
.knob.dragging{cursor:grabbing;transition:none;transform:scale(1.25)}
.knob:focus-visible{outline:2px solid var(--c);outline-offset:3px}

.center{grid-area:center;position:relative;z-index:3;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px 20px;box-shadow:0 6px 24px rgba(20,30,60,.08);display:flex;flex-direction:column;gap:6px;min-width:0}
.pickers{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.pickers label{display:flex;flex-direction:column;font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);gap:3px;flex:1 1 120px}
.pickers select{text-transform:none;letter-spacing:0;font-weight:500;font-size:.95rem;padding:7px 8px;border-radius:8px;border:1px solid var(--line);background:var(--bg);color:var(--ink)}
.lang{margin:6px 0 0;font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:700}
.sent{display:flex;flex-wrap:wrap;gap:4px 8px;align-items:flex-start}
.tok{display:inline-flex;flex-direction:column;align-items:center;border-radius:6px;padding:0 3px;--c:var(--ink)}
.tok .w{border-bottom:3px solid var(--c);line-height:1.2;padding-bottom:1px}
.tok .l{font-size:.66rem;color:var(--muted);margin-top:3px;white-space:nowrap;letter-spacing:.02em}
.es .tok .w{font-family:"Young Serif",Georgia,serif;font-size:clamp(1.5rem,3vw,2.1rem)}
.en .tok .w{font-size:1.15rem;border-bottom-width:2px}
.tok.r-verb{--c:var(--c-verb)}.tok.r-noun{--c:var(--c-noun)}.tok.r-det{--c:var(--c-det)}.tok.r-adj{--c:var(--c-adj)}.tok.r-neg{--c:var(--c-neg)}
.tok.r-subj{--c:var(--c-subj)}.tok.r-subj .w{color:var(--muted)}
.tok.chg{animation:pop .7s ease}
@keyframes pop{0%{background:var(--flash);transform:translateY(-3px)}60%{background:var(--flash)}100%{background:transparent;transform:none}}
.sent .dot{margin-left:-6px;font-size:clamp(1.5rem,3vw,2.1rem);font-family:"Young Serif",Georgia,serif;line-height:1.2}
.en .dot{font-size:1.15rem}
@media (prefers-reduced-motion: reduce){.tok.chg{animation:none;background:var(--flash)}.knob{transition:none}}

.actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:10px}
.btn{background:var(--accent);color:var(--accent-ink);border:0;border-radius:8px;padding:8px 14px;font-weight:600;cursor:pointer}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.chk{display:flex;gap:6px;align-items:center;font-size:.88rem;color:var(--muted);margin-left:auto;cursor:pointer}

.notes{display:flex;flex-direction:column;gap:6px;margin-top:10px;border-top:1px solid var(--line);padding-top:12px}
.note{font-size:.9rem;padding:7px 10px;border-radius:8px;background:var(--bg);border-left:3px solid transparent}
.note.hot{border-left-color:var(--accent)}
.note.warn{background:var(--warn-bg);color:var(--ink);border-left-color:var(--warn)}
.notes details{display:flex;flex-direction:column;gap:6px}
.notes details > .note{margin-top:6px}
.notes summary{cursor:pointer;font-size:.85rem;color:var(--muted);font-weight:600;padding:4px 0}
.notes .lang{margin:0 0 2px}
.note .tag{font-size:.66rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-right:6px}

@media (max-width:900px){
  .board{grid-template-columns:1fr;grid-template-areas:"center" "tense" "trigger" "person" "right" "det" "adj" "neg";gap:22px}
  .g-tense,.g-adj,.g-trigger{text-align:left}
  .g-tense .stations,.g-adj .stations,.g-trigger .stations{justify-content:flex-start}
  .g-trigger{align-items:flex-start}
  .substations{justify-content:flex-start}
  .tgroup{align-items:flex-start}
  .tgroup > div{justify-content:flex-start}
  .stations.col{flex-direction:row;flex-wrap:wrap}
  .g-right{flex-direction:row;flex-wrap:wrap;gap:22px}
  .center{padding:14px}
  .strings,.knob{display:none}
  .g-det,.g-adj,.g-neg{flex-direction:column}
  .g-adj{align-items:flex-start}
}