@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans:ital,wght@0,400;0,500;0,600;1,400&family=Syne:wght@600;700;800&display=swap");

:root {
  --ink: #07090d;
  --panel: #10141c;
  --panel-2: #161c27;
  --line: #2a3344;
  --mute: #8b97ab;
  --text: #e7eadf;
  --paper: #f3f0e4;
  --phos: #c8f542;
  --phos-dim: #7a9a28;
  --amber: #f0a202;
  --violet: #7c6cf0;
  --danger: #ff5d4a;
  --ok: #3ee0a2;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--ink); color: var(--text); }
body {
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  background-image:
    linear-gradient(180deg, rgba(200,245,66,0.03), transparent 28%),
    radial-gradient(circle at 80% -10%, rgba(124,108,240,0.16), transparent 42%),
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: auto, auto, 48px 48px, 48px 48px;
  background-position: 0 0, 0 0, -1px -1px, -1px -1px;
}

button, textarea { font: inherit; }
button { cursor: pointer; }

.app {
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 16px 64px;
}

.top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.brand { display: flex; gap: 14px; align-items: center; }
.mark {
  width: 46px; height: 46px; border-radius: 14px;
  background: conic-gradient(from 210deg, var(--phos), var(--violet), var(--amber), var(--phos));
  display: grid; place-items: center;
  box-shadow: 0 0 0 1px #000, 0 8px 30px rgba(200,245,66,0.18);
}
.mark span {
  width: 34px; height: 34px; border-radius: 10px; background: var(--ink);
  display: grid; place-items: center;
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px; color: var(--phos); letter-spacing: 0.06em;
}
.word h1 {
  font-family: Syne, sans-serif;
  font-weight: 800;
  letter-spacing: -0.04em;
  font-size: 28px;
  margin: 0;
  line-height: 1;
}
.word p { margin: 4px 0 0; color: var(--mute); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; }

.gauge-wrap { text-align: right; min-width: 110px; }
.gauge {
  width: 72px; height: 72px; margin-left: auto;
  border-radius: 50%;
  background: conic-gradient(var(--phos) calc(var(--heat) * 1%), #1c2330 0);
  display: grid; place-items: center;
}
.gauge i {
  width: 52px; height: 52px; border-radius: 50%; background: var(--ink);
  display: grid; place-items: center;
  font-family: "IBM Plex Mono", monospace;
  font-size: 14px; font-style: normal; color: var(--phos);
}
.gauge-wrap small { display: block; margin-top: 6px; color: var(--mute); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; }

.tabs {
  display: flex; gap: 8px; margin-bottom: 16px;
}
.tab {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--mute);
  padding: 8px 14px;
  border-radius: 999px;
}
.tab.on { color: var(--ink); background: var(--phos); border-color: var(--phos); font-weight: 600; }

.layout {
  display: grid;
  grid-template-columns: minmax(240px, 280px) 1fr;
  gap: 16px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.rail-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: sticky;
  top: 12px;
  height: fit-content;
  max-height: calc(100vh - 24px);
}

.rail-search input {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(16, 20, 28, 0.92);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 13px;
}
.rail-search input::placeholder { color: var(--mute); }
.rail-search input:focus {
  outline: 1px solid var(--phos-dim);
  border-color: var(--phos-dim);
}

.rail {
  background: rgba(16,20,28,0.88);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 10px;
  overflow: auto;
  max-height: calc(100vh - 80px);
}

.rail-group { margin-bottom: 4px; }
.rail-group:last-child { margin-bottom: 0; }
.rail-group-head {
  list-style: none;
  cursor: pointer;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mute);
  padding: 6px 8px 4px;
  user-select: none;
}
.rail-group-head::-webkit-details-marker { display: none; }
.rail-group-head::before {
  content: "▸";
  display: inline-block;
  margin-right: 6px;
  color: var(--phos-dim);
  transition: transform 0.15s ease;
}
.rail-group[open] > .rail-group-head::before { transform: rotate(90deg); }
.rail-group-list { display: flex; flex-direction: column; gap: 2px; }
.rail-empty {
  margin: 8px;
  font-size: 12px;
  color: var(--mute);
}

.agent {
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--text);
  padding: 10px 10px;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.agent:hover { background: var(--panel-2); }
.agent.on { background: var(--panel-2); outline: 1px solid var(--phos-dim); }
.agent b { font-size: 14px; font-weight: 600; }
.agent span { color: var(--mute); font-size: 11px; }

.stage {
  background: rgba(16,20,28,0.92);
  border: 1px solid var(--line);
  border-radius: 18px;
  min-height: 70vh;
  display: flex;
  flex-direction: column;
}
.stage-head {
  display: flex; justify-content: space-between; gap: 12px; align-items: center;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}
.stage-head h2 { margin: 0; font-family: Syne, sans-serif; font-size: 22px; letter-spacing: -0.03em; }
.meta { color: var(--mute); font-size: 12px; margin-top: 4px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.btn {
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 13px;
}
.btn.primary { background: var(--phos); color: var(--ink); border-color: var(--phos); font-weight: 600; }

.prompt {
  margin: 0;
  padding: 18px;
  overflow: auto;
  white-space: pre-wrap;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--paper);
}

.enhance { display: none; }
.enhance.on { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.box {
  background: rgba(16,20,28,0.92);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  min-height: 62vh;
}
.box h3 {
  margin: 0 0 10px;
  font-family: Syne, sans-serif;
  font-size: 16px;
}
textarea {
  flex: 1;
  width: 100%;
  resize: vertical;
  min-height: 220px;
  background: #0b0e14;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
}
.row { display: flex; gap: 8px; margin-top: 12px; }

.toast {
  position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%);
  background: var(--paper); color: #111;
  padding: 10px 14px; border-radius: 999px;
  font-size: 13px; font-weight: 600;
  display: none;
}

@media (max-width: 900px) {
  .layout, .enhance.on { grid-template-columns: 1fr; }
  .rail-wrap { position: static; max-height: none; }
  .rail { max-height: none; display: grid; grid-template-columns: 1fr 1fr; }
  .word h1 { font-size: 22px; }
}