:root {
  --bg: #0d1017;
  --panel: #151a24;
  --panel-2: #1b2230;
  --line: #262f40;
  --text: #e6ebf5;
  --muted: #8d98ab;
  --accent: #6f7cff;
  --accent-2: #a78bfa;
  --ok: #35c48a;
  --warn: #f2a33c;
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  background: radial-gradient(1200px 600px at 15% -10%, #1a2140 0%, var(--bg) 55%);
  color: var(--text);
  font: 15px/1.5 "Segoe UI", Inter, system-ui, -apple-system, sans-serif;
}

a { color: var(--accent-2); }

header {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  justify-content: space-between;
  padding: 18px 24px 12px;
  border-bottom: 1px solid var(--line);
}

header h1 {
  margin: 0 0 4px;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.2px;
}

.sub {
  margin: 0;
  max-width: 78ch;
  color: var(--muted);
  font-size: 13px;
}

.badge {
  flex: none;
  margin-top: 2px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--line);
  color: var(--muted);
}

.badge.on { color: var(--ok); border-color: #1f5a44; background: #10241d; }
.badge.off { color: var(--warn); border-color: #5a431f; background: #241c10; }

main {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
}

.chat {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-right: 1px solid var(--line);
}

.messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.empty {
  margin: auto;
  max-width: 52ch;
  text-align: center;
  color: var(--muted);
}

.empty .hint { font-size: 13px; }

.msg {
  max-width: 86ch;
  padding: 12px 15px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.msg.user {
  align-self: flex-end;
  background: #1d2440;
  border-color: #2f3a63;
}

.msg.assistant { align-self: flex-start; background: var(--panel-2); }

.msg .who {
  display: block;
  margin-bottom: 6px;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.msg .attached {
  display: block;
  max-width: 100%;
  max-height: 220px;
  margin-top: 8px;
  border-radius: 8px;
}

.msg details {
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #11161f;
}

.msg details summary {
  cursor: pointer;
  padding: 7px 10px;
  font-size: 12px;
  color: var(--muted);
  user-select: none;
}

.msg details pre {
  margin: 0;
  padding: 0 10px 10px;
  max-height: 320px;
  overflow: auto;
  font: 12.5px/1.5 ui-monospace, "Cascadia Mono", Consolas, monospace;
  color: #b9c4d6;
  white-space: pre-wrap;
}

.msg .content:empty::after {
  content: "▍";
  color: var(--accent);
}

.msg.failed { border-color: #6b2b2b; background: #241416; }
.msg.failed .content { color: #ffb4b4; }

.composer {
  padding: 14px 24px 18px;
  border-top: 1px solid var(--line);
  background: rgba(13, 16, 23, 0.6);
  backdrop-filter: blur(6px);
}

.composer textarea {
  width: 100%;
  resize: vertical;
  min-height: 68px;
  max-height: 240px;
  padding: 11px 13px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  font: inherit;
}

.composer textarea:focus,
.settings input:focus,
.settings textarea:focus,
.settings select:focus {
  outline: none;
  border-color: var(--accent);
}

.composer-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.grow { flex: 1; }

.filename { font-size: 12px; color: var(--muted); max-width: 22ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

button {
  padding: 8px 14px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}

button:hover:not(:disabled) { border-color: #3a4761; }

button:disabled { opacity: 0.45; cursor: default; }

button.primary {
  border-color: transparent;
  background: linear-gradient(180deg, var(--accent), #5560e0);
  color: #fff;
  font-weight: 600;
}

button.ghost { background: transparent; color: var(--muted); }

.file {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: 1px dashed var(--line);
  border-radius: 9px;
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
}

.file:hover { border-color: var(--accent); color: var(--text); }

.file input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }

.settings {
  overflow-y: auto;
  padding: 18px 20px 28px;
  background: var(--panel);
}

.settings h2 {
  margin: 18px 0 8px;
  font-size: 12px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
}

.settings h2:first-child { margin-top: 0; }

.settings label {
  display: block;
  margin-bottom: 12px;
  font-size: 12.5px;
  color: var(--muted);
}

.settings label.check {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}

.settings input[type="url"],
.settings input[type="password"],
.settings input[type="text"],
.settings input[type="number"],
.settings select,
.settings textarea {
  width: 100%;
  margin-top: 5px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  font: inherit;
  font-size: 13px;
}

.settings input[type="range"] {
  width: 100%;
  margin-top: 6px;
  accent-color: var(--accent);
}

.settings input[type="checkbox"] { accent-color: var(--accent); }

.settings output { float: right; color: var(--text); font-variant-numeric: tabular-nums; }

.row { display: flex; gap: 8px; margin: 4px 0 10px; }

.status { margin: 0 0 6px; font-size: 12.5px; color: var(--muted); min-height: 1.2em; }
.status.ok { color: var(--ok); }
.status.err { color: #ff9b9b; }

.fine { margin: 20px 0 0; font-size: 11.5px; line-height: 1.55; color: #6f7a8d; }

.fine code { color: #9aa6bb; }

@media (max-width: 900px) {
  main { grid-template-columns: 1fr; }
  .chat { border-right: none; }
  .settings { border-top: 1px solid var(--line); max-height: 46vh; }
}