:root {
  --bg: #0a1220;
  --panel: #101b30;
  --panel-2: #13213a;
  --text: #dfe8f6;
  --muted: #8ba0bd;
  --accent: #58e8b1;
  --danger: #ff6b6b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "Inter", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% 0%, #1a2845 0%, var(--bg) 40%);
}
.hidden { display: none !important; }
.center-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
}
.auth-card {
  width: min(420px, 92vw);
  background: var(--panel);
  border: 1px solid #20304f;
  border-radius: 16px;
  padding: 20px;
  display: grid;
  gap: 10px;
}
input, textarea, select, button {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid #25385d;
  border-radius: 10px;
  padding: 10px;
}
label { display: block; }
label > span { display: block; margin-bottom: 6px; color: var(--muted); font-size: 13px; }
button { cursor: pointer; }
button.primary {
  background: var(--accent);
  color: #062419;
  border: none;
  font-weight: 700;
}
.tabs { display: flex; gap: 8px; }
.tab.active { outline: 2px solid var(--accent); }
.error { color: var(--danger); min-height: 1.2em; }

.app {
  height: 100vh;
  display: grid;
  grid-template-columns: 280px 1fr;
}
.sidebar {
  background: rgba(7, 14, 28, 0.9);
  border-right: 1px solid #1d2b46;
  padding: 14px;
  display: grid;
  gap: 10px;
  grid-template-rows: auto auto 1fr auto;
}
.brand { font-size: 22px; font-weight: 700; }
.dialog-list { overflow: auto; display: grid; gap: 6px; }
.dialog-item {
  padding: 10px;
  border-radius: 10px;
  background: #13213a;
  border: 1px solid #25385d;
  cursor: pointer;
}
.dialog-item.active { border-color: var(--accent); }
.side-actions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }

.main {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 0;
}
.topbar {
  display: flex;
  gap: 8px;
  padding: 12px;
  border-bottom: 1px solid #1d2b46;
  overflow: auto;
}
.chat {
  padding: 16px;
  overflow: auto;
  display: grid;
  gap: 10px;
}
.bubble {
  max-width: min(900px, 85%);
  padding: 12px;
  border-radius: 14px;
  border: 1px solid #2a3f66;
  background: #101b30;
  white-space: pre-wrap;
}
.bubble.user {
  justify-self: end;
  background: rgba(88, 232, 177, 0.12);
  border-color: rgba(88, 232, 177, 0.35);
}
.composer {
  padding: 10px;
  border-top: 1px solid #1d2b46;
  display: grid;
  gap: 8px;
}
#message-input { min-height: 90px; resize: vertical; }
.file-row { display: flex; gap: 10px; align-items: center; }
.file-row input[type="file"] { max-width: 420px; }
dialog {
  width: min(760px, 92vw);
  background: var(--panel);
  border: 1px solid #304367;
  color: var(--text);
  border-radius: 14px;
}
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 10px; }
.field { display: grid; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.row { margin-top: 10px; display: flex; gap: 8px; }
#rag-list { display: grid; gap: 8px; max-height: 300px; overflow: auto; margin: 10px 0; }
.rag-item { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
#memory-list { display: grid; gap: 8px; max-height: 320px; overflow: auto; margin: 10px 0; }
.memory-item {
  display: grid;
  gap: 8px;
  background: #13213a;
  border: 1px solid #25385d;
  border-radius: 10px;
  padding: 10px;
}
.memory-meta { color: var(--muted); font-size: 12px; }

@media (max-width: 980px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { grid-template-rows: auto auto auto auto; }
  .dialog-list { max-height: 160px; }
  .grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .file-row { flex-direction: column; align-items: flex-start; }
}