:root {
  --bg: #0b1220;
  --bg-elev: #121a2b;
  --card: #162036;
  --border: rgba(148, 163, 184, 0.18);
  --text: #e8eef9;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-2: #818cf8;
  --ok: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;
  --chip: #1e293b;
  --radius: 16px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(56, 189, 248, 0.12), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(129, 140, 248, 0.14), transparent 55%),
    var(--bg);
}

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

.app {
  max-width: 1100px;
  margin: 0 auto;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  padding: 1rem 1rem 0.75rem;
  gap: 0.75rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand { display: flex; align-items: center; gap: 0.75rem; }
.logo {
  width: 42px; height: 42px; border-radius: 12px;
  display: grid; place-items: center; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b1220; box-shadow: var(--shadow);
}
.brand h1 { margin: 0; font-size: 1.2rem; letter-spacing: -0.02em; }
.tagline { margin: 0; color: var(--muted); font-size: 0.8rem; }
.topbar-meta { display: flex; gap: 0.4rem; flex-wrap: wrap; }

.pill {
  font-size: 0.72rem; padding: 0.28rem 0.6rem; border-radius: 999px;
  background: var(--chip); border: 1px solid var(--border); color: var(--text);
}
.pill.muted { color: var(--muted); }
.pill.staging { background: rgba(251, 191, 36, 0.15); border-color: rgba(251, 191, 36, 0.45); color: var(--warn); }

.banner {
  display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; align-items: baseline;
  padding: 0.7rem 1rem; border-radius: 12px;
  border: 1px solid rgba(251, 191, 36, 0.4);
  background: rgba(251, 191, 36, 0.1);
  color: #fde68a; font-size: 0.9rem;
}
.banner strong { color: #fbbf24; }

.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0.85rem;
  min-height: 0;
}

.card {
  background: color-mix(in srgb, var(--card) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.sidebar { display: flex; flex-direction: column; gap: 0.75rem; }
.identity, .tips { padding: 1rem; }
.identity h2, .tips h2 {
  margin: 0 0 0.6rem; font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--muted); font-weight: 600;
}
.identity .name { margin: 0 0 0.75rem; font-size: 1.05rem; font-weight: 600; }
.identity dl { margin: 0; display: grid; gap: 0.45rem; }
.identity dl div { display: flex; justify-content: space-between; gap: 0.5rem; font-size: 0.85rem; }
.identity dt { color: var(--muted); }
.identity dd { margin: 0; font-weight: 500; text-align: right; }
.identity dd.unavailable { color: var(--warn); }

.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.chip {
  border: 1px solid var(--border); background: var(--chip); color: var(--text);
  border-radius: 999px; padding: 0.35rem 0.7rem; font-size: 0.78rem; cursor: pointer;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }

.chat {
  display: flex; flex-direction: column; min-height: 520px; overflow: hidden;
}
.messages {
  flex: 1; overflow-y: auto; padding: 1rem; display: flex; flex-direction: column; gap: 0.75rem;
}
.msg {
  max-width: min(92%, 640px); padding: 0.75rem 0.9rem; border-radius: 14px;
  line-height: 1.45; font-size: 0.95rem; white-space: pre-wrap; word-break: break-word;
}
.msg.user {
  align-self: flex-end;
  background: linear-gradient(135deg, rgba(56,189,248,0.25), rgba(129,140,248,0.28));
  border: 1px solid rgba(56,189,248,0.35);
}
.msg.assistant {
  align-self: flex-start; background: rgba(15, 23, 42, 0.65);
  border: 1px solid var(--border);
}
.msg.system {
  align-self: center; background: transparent; color: var(--muted);
  font-size: 0.8rem; border: none; text-align: center;
}
.msg .meta { margin-top: 0.45rem; font-size: 0.72rem; color: var(--muted); }

.status-chips { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 0.5rem; }
.status-chip {
  font-size: 0.68rem; padding: 0.2rem 0.5rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--chip);
}
.status-chip.MOCK, .status-chip.LIVE { border-color: rgba(52, 211, 153, 0.4); color: var(--ok); }
.status-chip.UNAVAILABLE, .status-chip.PLANNED, .status-chip.NOT_IMPLEMENTED {
  border-color: rgba(251, 191, 36, 0.4); color: var(--warn);
}

.tool-row {
  padding: 0 1rem 0.4rem; display: flex; flex-wrap: wrap; gap: 0.35rem;
}
.composer {
  display: flex; gap: 0.5rem; padding: 0.75rem 1rem 0.5rem; border-top: 1px solid var(--border);
  align-items: flex-end;
}
.composer textarea {
  flex: 1; resize: none; min-height: 44px; max-height: 140px;
  border-radius: 12px; border: 1px solid var(--border); background: #0f172a;
  color: var(--text); padding: 0.7rem 0.85rem; font: inherit;
}
.composer textarea:focus { outline: 2px solid rgba(56, 189, 248, 0.35); border-color: var(--accent); }

.btn {
  border: 1px solid var(--border); background: var(--chip); color: var(--text);
  border-radius: 12px; padding: 0.65rem 1rem; font: inherit; cursor: pointer;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b1220; border: none; font-weight: 650; min-width: 88px;
}
.btn.ghost { width: 100%; }
.btn.tiny { padding: 0.3rem 0.55rem; border-radius: 8px; }

.feedback-bar {
  display: flex; align-items: center; gap: 0.45rem; padding: 0 1rem 0.75rem;
  color: var(--muted); font-size: 0.8rem;
}
.feedback-msg { color: var(--ok); }
.error {
  margin: 0 1rem 0.75rem; color: #fecaca; background: rgba(248, 113, 113, 0.12);
  border: 1px solid rgba(248, 113, 113, 0.35); border-radius: 10px; padding: 0.55rem 0.75rem;
  font-size: 0.85rem;
}

.typing {
  display: inline-flex; gap: 4px; align-items: center;
}
.typing span {
  width: 6px; height: 6px; border-radius: 50%; background: var(--muted);
  animation: bounce 1.2s infinite ease-in-out;
}
.typing span:nth-child(2) { animation-delay: 0.15s; }
.typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes bounce {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.4; }
  40% { transform: translateY(-4px); opacity: 1; }
}

.footer {
  display: flex; justify-content: space-between; gap: 0.75rem; flex-wrap: wrap;
  color: var(--muted); font-size: 0.75rem; padding: 0.25rem 0.2rem 0.5rem;
}

@media (max-width: 840px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { order: 2; }
  .chat { order: 1; min-height: 62vh; }
  .tips { display: none; }
}