:root {
  --bg: #040814; --panel: #070f22; --panel-2: #0b1730;
  --ink: #eef5ff; --dim: #9fb3d1; --mute: #7c90b4;
  --blue: #3b82f6; --blue-2: #60a5fa;
  --line: rgba(147, 197, 253, .14);
  --sans: "Space Grotesk", system-ui, sans-serif;
  --mono: "Space Mono", ui-monospace, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body { background: var(--bg); color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
button, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }

.logo-tile {
  width: 56px; height: 56px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(140deg, #60a5fa, #1d4ed8); font-family: "Hiragino Mincho ProN", serif;
  font-weight: 700; font-size: 28px; box-shadow: 0 8px 30px rgba(59,130,246,.45);
}
.logo-tile.sm { width: 26px; height: 26px; font-size: 14px; border-radius: 6px; box-shadow: none; }
.btn { font-family: var(--mono); font-weight: 700; font-size: 12px; letter-spacing: .14em; padding: 13px 20px; border-radius: 10px; }
.btn.primary { background: #2563eb; color: #fff; }

.locked { height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px; text-align: center; padding: 20px;
  background: radial-gradient(40% 50% at 50% 45%, rgba(59,130,246,.18), transparent 70%); }
.locked h1 { font-size: 36px; letter-spacing: -.02em; }
.locked p { font-family: var(--mono); font-size: 13px; color: var(--dim); margin-bottom: 10px; }

.app { height: 100%; display: flex; flex-direction: column; }
.bar { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-bottom: 1px solid var(--line); background: var(--panel); }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-weight: 700; font-size: 12px; letter-spacing: .18em; margin-right: 8px; }
.tag { color: var(--blue-2); font-size: 11px; border: 1px solid var(--line); padding: 3px 7px; border-radius: 5px; }
.spacer { flex: 1; }
.who { font-family: var(--mono); font-size: 11px; color: var(--mute); }
select { background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px; font-family: var(--mono); font-size: 12px; max-width: 200px; }
.ghost { font-family: var(--mono); font-size: 12px; padding: 7px 12px; border-radius: 8px; border: 1px solid var(--line); transition: border-color .15s, background .15s; }
.ghost:hover { border-color: var(--blue-2); background: rgba(59,130,246,.08); }
.ghost:active { transform: scale(.97); }
.ghost.xs { padding: 4px 9px; font-size: 11px; }

.panes { flex: 1; min-height: 0; display: grid; grid-template-columns: 320px 1fr 1fr; }
.pane { display: flex; flex-direction: column; min-height: 0; border-right: 1px solid var(--line); }
.pane:last-child { border-right: 0; }
.pane-head { display: flex; align-items: center; gap: 8px; height: 38px; padding: 0 14px; border-bottom: 1px solid var(--line);
  font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: .16em; color: var(--dim); background: var(--panel); }
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 8px var(--blue); }
.dot.live { background: #22d3ee; box-shadow: 0 0 8px #22d3ee; }
.saved { margin-left: auto; color: var(--mute); font-weight: 400; letter-spacing: .05em; }

.chat { background: var(--panel); }
.msgs { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.msg { font-family: var(--mono); font-size: 12.5px; line-height: 1.6; padding: 10px 12px; border-radius: 10px; max-width: 92%; white-space: pre-wrap; }
.msg.bot { background: var(--panel-2); border: 1px solid var(--line); }
.msg.me { background: #2563eb; color: #fff; align-self: flex-end; }
.msg.typing { color: var(--mute); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 14px 10px; }
.chips button { font-family: var(--mono); font-size: 11px; padding: 5px 9px; border-radius: 999px; border: 1px solid var(--line); color: var(--dim); }
.chips button:hover { border-color: var(--blue-2); color: var(--ink); }
.composer { display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--line); }
.composer textarea { flex: 1; resize: none; background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font-family: var(--mono); font-size: 12.5px; outline: none; }
.composer textarea:focus { border-color: var(--blue-2); }
.send { width: 40px; border-radius: 10px; background: #2563eb; color: #fff; font-size: 18px; font-weight: 700; }
.send:active { transform: scale(.95); }

#code { flex: 1; resize: none; border: 0; outline: none; background: #050b1a; color: #cfe2ff; padding: 16px; font-family: var(--mono); font-size: 12.5px; line-height: 1.65; tab-size: 2; }
#frame { flex: 1; border: 0; background: #fff; }

@media (max-width: 1000px) {
  .panes { grid-template-columns: 1fr; grid-template-rows: 320px 300px 1fr; overflow-y: auto; }
  .pane { border-right: 0; border-bottom: 1px solid var(--line); }
  .who { display: none; }
}

.logo-tile { overflow: hidden; padding: 0; }
.logo-tile img { width: 100%; height: 100%; object-fit: cover; display: block; }

.msg.err { border-color: rgba(248, 113, 113, .45); color: #fecaca; }
#prompt:disabled { opacity: .6; }