/* ═══════════════════════════════════════════════════════════
   THE CROSSWORD DESK — base.css
   Style: paper / stationery (纸质风) — warm brown-toned paper,
   fountain-pen indigo ink + sienna stationery accents, serif type,
   dashed hairlines, warm soft shadows.
   ═══════════════════════════════════════════════════════════ */
:root{
  /* paper surfaces — cool violet-tinted white (not warm cream, not yellow) */
  --paper:#EFEBF0;  --paper-2:#E2DDE6;  --sheet:#FAF8FB;
  /* neutral cool printer's ink (violet-grey black, not warm brown-black) */
  --ink:#26232B;  --ink-soft:#565260;  --ink-mute:#8A8692;
  /* stationery accents: deep indigo fountain-pen ink (primary) + sage green */
  --red:#1E3A8A;  --red-deep:#172554;
  --sage:#5A7A5A;
  /* hairlines & dashed rules — cool violet-grey */
  --hair:1px dashed rgba(38,35,43,.4);
  --hair-strong:1px dashed rgba(38,35,43,.65);
  /* cool soft shadow */
  --shadow:2px 3px 10px rgba(38,35,43,.14), 6px 10px 26px -18px rgba(38,35,43,.35);
  --font-display:"Fraunces","Lora",Georgia,"Times New Roman",serif;
  --font-body:"Lora","Spectral",Georgia,serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --rail-w:272px; --rail-r:360px;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0;padding:0}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:15px; line-height:1.45;
  /* paper grain + faint ruled lines, programmatically generated */
  background-image:
    radial-gradient(rgba(38,35,43,.07) .6px, transparent .7px),
    radial-gradient(rgba(38,35,43,.05) .5px, transparent .6px),
    repeating-linear-gradient(0deg, transparent 0 27px, rgba(38,35,43,.06) 27px 28px);
  background-size:6px 6px, 11px 11px, auto;
  background-position:0 0, 3px 4px, 0 0;
  min-height:100vh;
}
::selection{background:var(--red);color:var(--paper)}
button{font-family:inherit;cursor:pointer}
input,select{font-family:inherit}

/* ── masthead ─────────────────────────────────────────── */
.masthead{border-bottom:3px double var(--ink);padding:10px 22px 12px;position:relative;background:var(--paper)}
.masthead-top{display:flex;justify-content:space-between;gap:12px;border-bottom:var(--hair);padding-bottom:6px}
.mast-meta{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-mute)}
.masthead-main{display:flex;align-items:baseline;gap:18px;flex-wrap:wrap;padding:8px 0 6px}
.mast-title{font-family:var(--font-display);font-weight:900;font-size:clamp(30px,4.4vw,52px);margin:0;letter-spacing:-.015em;line-height:1}
.mast-tag{margin:0;font-style:italic;color:var(--ink-mute);font-size:14px}
.mast-nav{display:flex;gap:2px;align-items:center}
.mast-nav-btn{background:none;border:none;border-bottom:2px dashed transparent;padding:6px 12px;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-mute)}
.mast-nav-btn:hover{color:var(--ink)}
.mast-nav-btn.is-active{color:var(--red);border-bottom-color:var(--red)}
.mast-nav-spacer{flex:1}

/* ── desk layout ──────────────────────────────────────── */
.desk{
  display:grid;grid-template-columns:var(--rail-w) minmax(0,1fr) var(--rail-r);
  gap:0;align-items:start;max-width:1720px;margin:0 auto;
}
.rail{background:var(--paper);padding:18px 16px 24px;display:flex;flex-direction:column;gap:18px;min-height:calc(100vh - 118px)}
.rail-left{border-right:var(--hair-strong)}
.rail-right{border-left:var(--hair-strong)}
.rail-block{display:flex;flex-direction:column;gap:10px;min-height:0}
.rail-scroll{overflow-y:auto;max-height:calc(100vh - 320px)}
.rail-stats{margin-top:auto}
.rail-h{font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink);margin:0;padding-bottom:6px;border-bottom:var(--hair-strong);display:flex;justify-content:space-between;align-items:baseline}
.rail-note{font-size:12.5px;color:var(--ink-mute);font-style:italic;margin:0}

/* ── buttons ──────────────────────────────────────────── */
.btn{background:var(--sheet);border:var(--hair-strong);border-radius:3px;padding:7px 12px;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink);box-shadow:1px 2px 0 rgba(38,35,43,.35);transition:transform .08s ease,box-shadow .08s ease}
.btn:hover{transform:translate(-1px,-1px);box-shadow:2px 3px 0 rgba(38,35,43,.35)}
.btn:active{transform:translate(1px,1px);box-shadow:0 0 0 rgba(38,35,43,.35)}
.btn-primary{background:var(--red);border-color:var(--red-deep);color:#F4F2F6}
.btn-ghost{box-shadow:none;border-color:transparent;color:var(--ink-mute)}
.btn-ghost:hover{color:var(--ink)}
.btn-block{width:100%}
.btn-split{position:relative;display:inline-block}
.menu{position:absolute;top:calc(100% + 4px);left:0;z-index:40;background:var(--sheet);border:var(--hair-strong);box-shadow:var(--shadow);min-width:150px;padding:4px;display:flex;flex-direction:column;border-radius:3px}
.menu button{background:none;border:none;text-align:left;padding:7px 9px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink)}
.menu button:hover{background:var(--paper-2)}

/* ── library ──────────────────────────────────────────── */
.library{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.library-item{display:block;width:100%;text-align:left;background:var(--sheet);border:var(--hair);border-left:3px solid transparent;padding:9px 11px;transition:border-color .12s ease,background .12s ease;border-radius:3px;box-shadow:1px 2px 6px rgba(38,35,43,.1)}
.library-item:hover{background:var(--paper-2)}
.library-item.is-active{border-left-color:var(--red);background:var(--sheet)}
.li-title{font-family:var(--font-display);font-weight:600;font-size:15px;line-height:1.2;display:block}
.li-meta{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-mute);display:flex;gap:8px;margin-top:3px}
.li-tag{color:var(--red)}
.li-prog{color:var(--red)}
.li-done{color:var(--sage)}
.library-empty{font-style:italic;color:var(--ink-mute);font-size:13px;padding:6px 2px}

/* ── ledger ───────────────────────────────────────────── */
.ledger{display:flex;flex-direction:column}
.ledger-row{display:flex;justify-content:space-between;padding:5px 0;border-bottom:var(--hair);font-size:13px;color:var(--ink-mute)}
.ledger-row b{font-family:var(--font-mono);color:var(--ink);font-weight:600}

/* ── press (board column) ─────────────────────────────── */
.press{padding:20px 28px 28px;display:flex;flex-direction:column;gap:14px;min-width:0}
.press-head{display:flex;justify-content:space-between;align-items:flex-end;gap:18px;border-bottom:var(--hair-strong);padding-bottom:10px}
.press-title{font-family:var(--font-display);font-weight:900;font-size:clamp(22px,2.6vw,34px);margin:0;line-height:1.05;letter-spacing:-.01em}
.press-sub{margin:3px 0 0;font-style:italic;color:var(--ink-mute);font-size:13.5px}
.press-meta{display:flex;align-items:center;gap:14px;flex:none}
.clock{font-family:var(--font-mono);font-size:19px;font-weight:600;border:var(--hair-strong);background:var(--sheet);padding:4px 10px;box-shadow:1px 2px 0 rgba(38,35,43,.3);border-radius:3px}
.fill-meter{width:110px;height:8px;border:var(--hair-strong);background:var(--sheet);position:relative;border-radius:3px}
.fill-bar{position:absolute;inset:0;width:0%;background:var(--red);transition:width .3s ease}
.err-count{font-family:var(--font-mono);font-size:11px;color:var(--ink-mute);min-width:52px;text-align:right}
.press-foot{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.06em;color:var(--ink-mute);text-align:center;text-transform:uppercase}
.kbd{border:1px dashed var(--ink-mute);padding:0 4px;border-radius:2px}

/* ── toolbar ──────────────────────────────────────────── */
.toolbar{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.toolbar-group{display:flex;gap:8px;align-items:center}
.switch{display:flex;gap:7px;align-items:center;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-mute);cursor:pointer;user-select:none}
.switch input{accent-color:var(--red);width:15px;height:15px;cursor:pointer}

/* ── clues ────────────────────────────────────────────── */
.clue-cols{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.clue-h{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--red);margin:0 0 6px;border-bottom:1px dashed rgba(38,35,43,.4);padding-bottom:4px}
.clue-list{list-style:none;margin:0;padding:0;counter-reset:clue}
.clue-item{display:flex;gap:8px;padding:6px 7px;border-left:2px solid transparent;cursor:pointer;font-size:13.5px;line-height:1.35;border-radius:2px}
.clue-item:hover{background:var(--paper-2)}
.clue-item.is-active{background:var(--sheet);border-left-color:var(--red)}
.clue-item.is-done{color:var(--ink-mute)}
.clue-item.is-done .clue-text{text-decoration:line-through;text-decoration-color:var(--red)}
.clue-num{font-family:var(--font-mono);font-size:11px;font-weight:600;color:var(--red);flex:none;padding-top:1px;min-width:16px;text-align:right}
.clue-text{flex:1}

/* ── agent ────────────────────────────────────────────── */
.agent-block{min-height:300px;display:flex;flex-direction:column}
.agent-presence{font-family:var(--font-body);font-size:11px;letter-spacing:.02em;text-transform:none;color:var(--sage);display:flex;align-items:center;gap:5px}
.agent-presence i{width:7px;height:7px;border-radius:50%;background:var(--sage);display:inline-block;animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:.35}50%{opacity:1}}
.agent-log{flex:1;overflow-y:auto;min-height:220px;max-height:calc(100vh - 560px);display:flex;flex-direction:column;gap:12px;padding:4px 2px}
.msg{display:flex;gap:9px;animation:msgIn .28s ease both}
@keyframes msgIn{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
.msg-avatar{flex:none;width:26px;height:26px;border-radius:2px;background:var(--ink);color:var(--paper);font-family:var(--font-display);font-weight:900;font-size:14px;display:flex;align-items:center;justify-content:center}
.msg-body{flex:1;min-width:0}
.msg-editor .msg-body{background:var(--sheet);border:var(--hair);padding:8px 10px;box-shadow:var(--shadow);border-radius:3px}
.msg-user .msg-body{font-family:var(--font-mono);font-size:12px;color:var(--ink-mute);padding:2px 0 2px 4px;border-left:2px dashed var(--paper-2)}
.msg-text{font-size:13.5px;line-height:1.5}
.msg-text em{color:var(--red)}
.msg-text b{color:var(--ink)}
.toolchip{display:inline-block;font-family:var(--font-mono);font-size:10.5px;color:var(--red);background:rgba(30,58,138,.08);border:1px dashed rgba(30,58,138,.45);padding:1px 6px;margin:0 2px;border-radius:2px}
.msg-tools{font-family:var(--font-mono);font-size:10px;color:var(--ink-mute);margin-bottom:4px;letter-spacing:.04em}
.typing{display:inline-flex;gap:4px;padding:4px 2px}
.typing i{width:5px;height:5px;border-radius:50%;background:var(--ink-mute);animation:tp 1s ease-in-out infinite}
.typing i:nth-child(2){animation-delay:.15s}.typing i:nth-child(3){animation-delay:.3s}
@keyframes tp{0%,100%{opacity:.25;transform:translateY(0)}50%{opacity:1;transform:translateY(-2px)}}
.agent-form{display:flex;gap:8px;padding-top:10px;border-top:var(--hair-strong)}
.agent-form input{flex:1;background:var(--sheet);border:var(--hair-strong);padding:9px 11px;font-size:13.5px;border-radius:3px;min-width:0}
.agent-form input:focus{outline:2px dashed var(--red);outline-offset:1px}

/* ── modals ───────────────────────────────────────────── */
.modal{border:none;border:var(--hair-strong);box-shadow:0 24px 60px -20px rgba(38,35,43,.4);padding:0;max-width:460px;width:calc(100vw - 40px);background:var(--sheet);border-radius:4px}
.modal::backdrop{background:rgba(38,35,43,.4);backdrop-filter:blur(2px)}
.modal-card{padding:24px;display:flex;flex-direction:column;gap:12px}
.modal-h{font-family:var(--font-display);font-weight:900;font-size:24px;margin:0}
.modal-sub{margin:0;color:var(--ink-mute);font-style:italic;font-size:13.5px}
.field{display:flex;flex-direction:column;gap:5px}
.field span{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-mute)}
.field input,.field select{background:var(--paper);border:var(--hair-strong);padding:9px 10px;font-size:14px;border-radius:3px}
.field input:focus,.field select:focus{outline:2px dashed var(--red);outline-offset:1px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;padding-top:6px}
.help-list{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:8px;font-size:14px}
.help-list b{color:var(--red)}

/* ── toast ────────────────────────────────────────────── */
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--paper);font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;padding:9px 16px;z-index:90;box-shadow:var(--shadow);border-radius:3px;animation:msgIn .25s ease both}

/* ── responsive ───────────────────────────────────────── */
@media (max-width:1240px){:root{--rail-w:236px;--rail-r:320px}}
@media (max-width:1080px){
  .desk{grid-template-columns:1fr}
  .rail,.press{display:none;min-height:0;border:none;border-bottom:var(--hair-strong)}
  body[data-view="puzzle"] .press{display:flex}
  body[data-view="stack"] .rail-left{display:flex}
  body[data-view="clues"] .rail-right{display:flex}
  body[data-view="agent"] .rail-right{display:flex}
  body[data-view="clues"] #view-agent{display:none}
  body[data-view="agent"] #view-clues{display:none}
  .rail-scroll{max-height:none}
  .agent-log{max-height:420px;min-height:280px}
  .agent-block{min-height:0}
  .mast-nav-spacer{display:none}
  .rail-stats{margin-top:0}
}
@media (max-width:640px){
  .press{padding:14px 12px 20px}
  .clue-cols{grid-template-columns:1fr}
  .masthead{padding:8px 12px 10px}
  .mast-meta:last-child{display:none}
}
@media (prefers-reduced-motion:reduce){*{animation-duration:.01ms !important;transition-duration:.01ms !important}}