:root {
  --bg: #0e1014;
  --panel: #161a22;
  --panel-2: #1f2430;
  --border: #2a303c;
  --text: #e7ebf2;
  --muted: #8b94a7;
  --accent: #7aa2f7;
  --accent-2: #b392f0;
  --user: #2a3852;
  --assistant: #1e2430;
  --danger: #e06c75;
  --ok: #8fbc8f;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; background: var(--bg); color: var(--text); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.75rem 1.25rem; border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.app-header h1 { margin: 0; font-size: 1.1rem; font-weight: 600; }
.app-header nav a { margin-left: 1rem; font-size: 0.9rem; }

/* ── Chat layout ─────────────────────────────────────────────────────────── */
.chat-layout { display: grid; grid-template-rows: auto 1fr auto; height: 100vh; }
.messages {
  overflow-y: auto; padding: 1rem 1.25rem 2rem;
  display: flex; flex-direction: column; gap: 0.75rem;
}
.msg {
  max-width: 680px; padding: 0.65rem 0.9rem; border-radius: 0.9rem;
  line-height: 1.5; white-space: pre-wrap; word-wrap: break-word;
}
.msg.user { align-self: flex-end; background: var(--user); border-bottom-right-radius: 0.2rem; }
.msg.assistant { align-self: flex-start; background: var(--assistant); border-bottom-left-radius: 0.2rem; }
.msg .tool-trace { color: var(--muted); font-size: 0.8rem; margin-top: 0.35rem; }

.composer {
  border-top: 1px solid var(--border); background: var(--panel); padding: 0.75rem 1.25rem;
}
.composer form { display: flex; flex-direction: column; gap: 0.5rem; }
.composer textarea {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 0.5rem; padding: 0.6rem 0.75rem; font: inherit; resize: vertical;
}
.composer-actions { display: flex; justify-content: flex-end; gap: 0.5rem; }
.status { color: var(--muted); font-size: 0.85rem; min-height: 1.2em; }
.status.error { color: var(--danger); }
.status.ok { color: var(--ok); }

button {
  background: var(--accent); color: #0b0d11; border: none; border-radius: 0.4rem;
  padding: 0.45rem 0.9rem; font-weight: 600; cursor: pointer;
}
button:hover { filter: brightness(1.1); }
button.secondary { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); }
button.danger { background: var(--danger); color: #0b0d11; }

/* ── Admin layout ────────────────────────────────────────────────────────── */
.admin-layout { display: grid; grid-template-rows: auto 1fr; height: 100vh; }
.admin-main { padding: 1rem 1.25rem 2rem; overflow-y: auto; max-width: 1000px; }
.admin-tabs { display: flex; gap: 0.25rem; margin-bottom: 1rem; flex-wrap: wrap; }
.admin-tabs button {
  background: var(--panel-2); color: var(--muted); border: 1px solid var(--border);
}
.admin-tabs button.active { color: var(--text); border-color: var(--accent); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem 1rem; }
.form-grid label { display: flex; flex-direction: column; gap: 0.25rem; font-size: 0.9rem; color: var(--muted); }
.form-grid input, .form-grid textarea {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 0.4rem; padding: 0.45rem 0.6rem; font: inherit;
}
.form-grid .full { grid-column: 1 / -1; }
.form-grid .checkbox { flex-direction: row; align-items: center; gap: 0.5rem; }
.form-grid .actions { display: flex; align-items: center; gap: 0.75rem; }

fieldset { border: 1px solid var(--border); border-radius: 0.5rem; padding: 0.75rem 1rem; }
legend { padding: 0 0.35rem; color: var(--muted); }
.checkbox-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.35rem 0.75rem; }
.checkbox-grid label { display: inline-flex; align-items: center; gap: 0.35rem; font-size: 0.9rem; color: var(--text); }

.hint { color: var(--muted); font-size: 0.85rem; }
.stats { color: var(--muted); margin-bottom: 0.75rem; font-size: 0.9rem; }

.memory-row, .summary-row, .tracker-row {
  background: var(--panel); border: 1px solid var(--border); border-radius: 0.5rem;
  padding: 0.6rem 0.8rem; margin-bottom: 0.5rem;
}
.memory-row .meta, .summary-row .meta, .tracker-row .meta {
  color: var(--muted); font-size: 0.8rem; display: flex; justify-content: space-between;
  margin-bottom: 0.25rem;
}
.memory-row textarea { width: 100%; margin-top: 0.35rem; }
.memory-row input[type="text"] { width: 100%; }
.row-actions { display: flex; gap: 0.5rem; margin-top: 0.4rem; }

pre {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 0.5rem;
  padding: 0.75rem 1rem; overflow-x: auto; white-space: pre-wrap; max-height: 500px;
}

form label { display: block; margin: 0.4rem 0; color: var(--muted); font-size: 0.9rem; }
form textarea, form input[type="text"], form input[type="number"] {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 0.4rem; padding: 0.45rem 0.6rem; font: inherit; width: 100%;
}