/* LCSH Cataloging Agent — demo page. Vanilla CSS, no build step. */

:root{
  --bg:#0f1012;
  --bg-2:#16181c;
  --panel:#17191e;
  --line:#282c34;
  --line-2:#343943;
  --fg:#e6e6e6;
  --fg-dim:#9aa0aa;
  --fg-dimmer:#6f757f;
  --accent:#d97757;
  --accent-2:#e8a87c;
  --green:#7fb069;
  --blue:#7aa2c8;
  --term-bg:#0b0c0e;
  --radius:10px;
  /* "M PLUS 1 Code" renders CJK at exactly twice the Latin advance, which keeps the
     box-drawing tables aligned in the Japanese transcript. System mono is the fallback. */
  --mono: "M PLUS 1 Code", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  --term-fs: 11.5px;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--bg); color:var(--fg);
  font-family:var(--sans); font-size:16px; line-height:1.55;
  overflow-x:hidden;
}
.wrap{width:100%; max-width:1180px; margin:0 auto;
  padding:0 max(20px, env(safe-area-inset-left)) 0 max(20px, env(safe-area-inset-right))}

/* ---------- top bar ---------- */
.topbar{
  border-bottom:1px solid var(--line); background:var(--bg-2);
  position:sticky; top:0; z-index:20;
}
.topbar .wrap{display:flex; align-items:center; justify-content:space-between; gap:12px; min-height:56px}
.brand{display:flex; align-items:center; gap:9px; min-width:0}
.brand .dot{width:9px; height:9px; border-radius:50%; background:var(--accent); flex:none}
.brand-name{font-weight:600; letter-spacing:.2px; font-size:15px; white-space:nowrap}
.bar-right{display:flex; align-items:center; gap:10px; min-width:0}
.ham{
  appearance:none; display:flex; align-items:center; gap:9px; cursor:pointer;
  background:var(--panel); border:1px solid var(--line-2); border-radius:8px;
  color:var(--fg); font-family:inherit; font-size:13px; padding:8px 12px; min-height:38px;
  transition:border-color .15s, background .15s;
}
.ham:hover{background:#22262d; border-color:#454b57}
.ham[aria-expanded="true"]{border-color:var(--accent); background:#1d1a18}
.ham-bars{display:grid; gap:3px; width:15px; flex:none}
.ham-bars i{display:block; height:2px; background:currentColor; border-radius:1px; transition:transform .2s, opacity .2s}
.ham[aria-expanded="true"] .ham-bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.ham[aria-expanded="true"] .ham-bars i:nth-child(2){opacity:0}
.ham[aria-expanded="true"] .ham-bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.ham-label{white-space:nowrap}

/* dropdown sheet hung off the bottom of the top bar */
.menu{
  position:absolute; left:0; right:0; top:100%; z-index:30;
  background:var(--bg-2); border-bottom:1px solid var(--line);
  box-shadow:0 18px 40px rgba(0,0,0,.5);
  animation:sheet .16s ease both;
}
@keyframes sheet{from{opacity:0; transform:translateY(-6px)} to{opacity:1; transform:none}}
.menu .wrap{padding-top:16px; padding-bottom:18px}
.menu-h{
  margin:0 0 10px; font-size:11px; letter-spacing:.1em; text-transform:uppercase;
  color:var(--fg-dimmer); font-weight:600;
}
.scrim{position:fixed; inset:0; z-index:19; background:rgba(0,0,0,.45)}

.badge{
  font-size:11px; letter-spacing:.08em; text-transform:uppercase; color:var(--fg-dim);
  border:1px solid var(--line-2); border-radius:999px; padding:3px 10px; white-space:nowrap;
}

/* ---------- intro ---------- */
.intro{padding:44px 0 26px; max-width:66ch}
.intro h1{font-size:clamp(26px,5.2vw,38px); line-height:1.15; margin:0 0 14px; letter-spacing:-.02em}
.intro p{margin:0; color:var(--fg-dim); font-size:clamp(15px,2.4vw,17px)}
.intro em{color:var(--fg); font-style:italic}

/* ---------- layout ---------- */
.grid{display:grid; grid-template-columns:300px minmax(0,1fr); gap:22px; align-items:start; padding-bottom:36px}
.stack{display:flex; flex-direction:column; gap:16px; min-width:0}

.panel{background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); padding:18px}
.panel-h{font-size:12px; letter-spacing:.1em; text-transform:uppercase; color:var(--fg-dim); margin:0 0 14px; font-weight:600}
.sub-h{font-size:13px; margin:24px 0 6px; color:var(--fg)}

/* record card */
.record{position:sticky; top:74px}
.record dl{margin:0; display:grid; grid-template-columns:1fr; gap:11px}
.record dt{font-size:11px; letter-spacing:.06em; text-transform:uppercase; color:var(--fg-dimmer)}
.record dd{margin:2px 0 0; font-size:14px; line-height:1.4; overflow-wrap:anywhere}
.record dd.mono{font-family:var(--mono); font-size:12.5px; color:var(--accent-2)}
.src{margin-top:16px; border-top:1px solid var(--line); padding-top:12px}
.src summary{cursor:pointer; font-size:13px; color:var(--fg-dim); list-style:none; padding:6px 0}
.src summary::-webkit-details-marker{display:none}
.src summary::before{content:"▸ "; color:var(--accent)}
.src[open] summary::before{content:"▾ "}
.src-body{font-size:13px; color:var(--fg-dim); line-height:1.5}
#rec-abstract, #rec-toc{white-space:pre-wrap; overflow-wrap:anywhere; margin:0}
.src-label{font-size:11px; letter-spacing:.06em; text-transform:uppercase; color:var(--fg-dimmer); margin:10px 0 2px}

/* stages */
.stages{
  list-style:none; margin:0; padding:0; display:grid; grid-template-columns:repeat(4,minmax(0,1fr));
  gap:8px;
}
.stages li{
  display:flex; align-items:center; gap:8px; min-width:0;
  background:var(--panel); border:1px solid var(--line); border-radius:8px; padding:9px 11px;
  font-size:12.5px; color:var(--fg-dimmer); transition:border-color .3s, color .3s, background .3s;
}
.stages li .n{
  flex:none; width:18px; height:18px; border-radius:50%; border:1px solid var(--line-2);
  display:grid; place-items:center; font-size:10px; font-family:var(--mono);
}
.stages li .t{overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.stages li.is-active{color:var(--fg); border-color:var(--accent); background:#1d1a18}
.stages li.is-active .n{border-color:var(--accent); color:var(--accent)}
.stages li.is-done{color:var(--fg-dim); border-color:var(--line-2)}
.stages li.is-done .n{border-color:var(--green); color:var(--green)}
.stages li.is-done .n::after{content:"✓"; font-size:10px}
.stages li.is-done .n{font-size:0}

/* ---------- terminal ---------- */
.terminal{
  background:var(--term-bg); border:1px solid var(--line); border-radius:var(--radius);
  overflow:hidden; display:flex; flex-direction:column; min-width:0;
}
.term-chrome{
  display:flex; align-items:center; gap:7px; padding:9px 12px;
  background:var(--bg-2); border-bottom:1px solid var(--line);
}
.tl{width:11px; height:11px; border-radius:50%; display:inline-block}
.tl.r{background:#ff5f57} .tl.y{background:#febc2e} .tl.g{background:#28c840}
.term-title{margin-left:8px; font-size:11.5px; color:var(--fg-dimmer); font-family:var(--mono)}

.term-body{
  height:min(62vh, 620px); height:min(62dvh, 620px); min-height:340px;
  overflow:auto; -webkit-overflow-scrolling:touch; overscroll-behavior:contain;
  padding:14px 16px 22px;
}
.term-body:focus{outline:none}
#term-out{
  margin:0; font-family:var(--mono); font-size:var(--term-fs); line-height:1.5;
  white-space:pre; color:#cfd3d9; width:max-content; min-width:100%;
}
#term-out .ln{display:block; min-height:1.5em}

/* transcript syntax colors */
.ln.bullet{color:#f2f3f5}
.ln.bullet .mk{color:var(--accent); font-weight:700}
.ln.tool{color:var(--fg-dimmer)}
.ln.tool .mk{color:var(--fg-dimmer)}
.ln.table{color:#8c93a0}
.ln.head{color:#fff; font-weight:700}
.ln.quote{color:var(--accent-2)}
.ln.marc{color:var(--green)}
.ln.li{color:#c6cad2}
.ln.rule{color:var(--line-2)}
.ln.prompt{color:var(--blue)}
.ln.prompt .mk{color:var(--green); font-weight:700}
.cursor{display:inline-block; width:.6em; height:1em; background:var(--accent);
  vertical-align:text-bottom; animation:blink 1.05s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* controls */
.term-controls{
  display:flex; align-items:center; gap:8px; flex-wrap:wrap;
  padding:10px 12px; background:var(--bg-2); border-top:1px solid var(--line);
}
.btn{
  appearance:none; background:#1f2229; color:var(--fg); border:1px solid var(--line-2);
  border-radius:7px; padding:8px 13px; font-size:13px; font-family:inherit; cursor:pointer;
  min-height:38px; touch-action:manipulation; transition:background .15s, border-color .15s;
}
.btn:hover{background:#272b33}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent); border-color:var(--accent); color:#1a1207; font-weight:600}
.btn.primary:hover{background:var(--accent-2)}
.speeds{display:flex; gap:4px}
.speeds-play{margin-left:auto}
.btn.speed{padding:8px 10px; font-family:var(--mono); font-size:12px; min-width:44px}
.btn.speed.is-on{border-color:var(--accent); color:var(--accent)}

.swipe-hint{
  display:none; font-size:11.5px; color:var(--fg-dimmer); padding:6px 14px 0; font-family:var(--mono);
}

/* ---------- result ---------- */
.result{animation:fade .5s ease both}
@keyframes fade{from{opacity:0; transform:translateY(6px)} to{opacity:1; transform:none}}
.marc{
  margin:0; padding:14px; background:var(--term-bg); border:1px solid var(--line); border-radius:8px;
  font-family:var(--mono); font-size:12.5px; line-height:1.85; color:var(--green);
  overflow-x:auto; -webkit-overflow-scrolling:touch; white-space:pre;
}
.note{font-size:13.5px; color:var(--fg-dim); margin:0 0 10px}

/* ---------- notes / footer ---------- */
.notes{padding:8px 0 40px; max-width:78ch}
.notes ul{margin:0; padding-left:20px; color:var(--fg-dim); font-size:14.5px}
.notes li{margin:8px 0}
.notes strong{color:var(--fg)}
code{font-family:var(--mono); font-size:.9em; color:var(--accent-2); overflow-wrap:anywhere}
.foot{border-top:1px solid var(--line); padding:18px 0 max(18px, env(safe-area-inset-bottom)); color:var(--fg-dimmer); font-size:12.5px}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .grid{grid-template-columns:minmax(0,1fr); gap:16px}
  .record{position:static; order:2}
  .stack{order:1}
  .stages{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:620px){
  :root{--term-fs:10px}
  .wrap{padding:0 14px}
  .intro{padding:28px 0 18px}
  .panel{padding:15px; border-radius:9px}
  .term-body{height:58vh; height:58dvh; min-height:280px; padding:12px 12px 18px}
  .term-controls{gap:6px; padding:9px 10px}
  .btn{padding:9px 11px; font-size:12.5px}
  .speeds{flex:1 1 auto; justify-content:space-between}
  .speeds-play{margin-left:0; flex:2 1 100%}
  .btn.speed{flex:1; min-width:0}
  .swipe-hint{display:block}
  .stages li{padding:8px 9px; font-size:11.5px}
  .term-title{display:none}
  .marc{font-size:11px; padding:11px}
}

@media (max-width:380px){
  :root{--term-fs:9px}
  .stages{grid-template-columns:minmax(0,1fr)}
}

@media (prefers-reduced-motion:reduce){
  .cursor{animation:none}
  .result{animation:none}
}


/* ---------- book picker ---------- */
.picker{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:10px}
.pick{
  appearance:none; text-align:left; cursor:pointer; min-width:0;
  background:var(--panel); border:1px solid var(--line); border-radius:var(--radius);
  padding:14px 15px; color:var(--fg); font-family:inherit;
  display:flex; flex-direction:column; gap:3px;
  transition:border-color .18s, background .18s, transform .12s;
}
.pick:hover{border-color:var(--line-2); background:#1b1e24}
.pick:active{transform:translateY(1px)}
.pick.is-on{border-color:var(--accent); background:#1d1a18}
.pick.is-on .pick-title::after{content:" ✓"; color:var(--accent)}
.pick-tag{
  font-size:10.5px; letter-spacing:.1em; text-transform:uppercase; color:var(--fg-dimmer);
  font-weight:600;
}
.pick.is-on .pick-tag{color:var(--accent)}
.pick-title{font-size:15px; font-weight:600; line-height:1.25; overflow-wrap:anywhere}
.pick-meta{font-size:12.5px; color:var(--fg-dim); font-family:var(--mono)}

.count{
  float:right; font-size:11px; letter-spacing:0; text-transform:none;
  color:var(--fg-dimmer); font-weight:400;
}

@media (max-width:1000px){
  .picker{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:620px){
  .picker{grid-template-columns:minmax(0,1fr); gap:8px}
  .pick{padding:12px 13px; flex-direction:row; align-items:baseline; flex-wrap:wrap; gap:2px 8px}
  .pick-title{font-size:14px; flex:1 1 100%; order:2}
  .pick-tag{order:1}
  .pick-meta{order:3; font-size:11.5px}
  .count{float:none; display:block; margin-top:3px}
  .badge{font-size:10px; padding:3px 8px}
  .ham{padding:9px 11px}
  .menu{max-height:calc(100dvh - 56px); overflow-y:auto; -webkit-overflow-scrolling:touch}
}
@media (max-width:430px){
  .badge{display:none}               /* the intro and footer still say it is a replay */
}