:root {
  --bg: #0d0d0d;
  --surface: #1a1a1a;
  --border: #2e2e2e;
  --text: #f5f5f5;
  --muted: #a3a3a3;
  --accent: #ffffff;
  --radius: 16px;
  --radius-sm: 12px;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.wrap {
  max-width: 520px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

h1 {
  font-size: 1.35rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}

.sub {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 1.5rem;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

input[type="text"] {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  outline: none;
}

input[type="text"]:focus {
  border-color: #555;
}

.row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--accent);
  color: var(--bg);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s ease, opacity 0.12s ease;
}

.btn:hover {
  opacity: 0.92;
}

.btn:active {
  transform: scale(0.98);
}

.btn.secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn.danger {
  background: #2a2a2a;
  color: #fecaca;
  border-color: #444;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.key-display {
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
  word-break: break-all;
  padding: 0.75rem 1rem;
  background: var(--bg);
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border);
  color: var(--muted);
  margin-top: 0.75rem;
}

.banner {
  margin-top: 1rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  border: 1px solid var(--border);
}

.banner.error {
  color: #fecaca;
  background: #1f1212;
}

.banner.ok {
  color: #bbf7d0;
  background: #0f1a12;
}

.messages {
  margin-top: 1rem;
  max-height: 280px;
  overflow-y: auto;
  padding: 0.5rem;
  background: var(--bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.msg {
  margin: 0.35rem 0;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 0.92rem;
}

.msg.me {
  border-color: #444;
}

.msg .ts {
  font-size: 0.72rem;
  color: var(--muted);
  margin-bottom: 0.2rem;
}

.chat-input {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.chat-input input {
  flex: 1;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.status-pill {
  font-size: 0.78rem;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}

.status-pill.on {
  color: #bbf7d0;
  border-color: #365a3f;
}

.muted-hint {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.75rem;
}

a.back {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

a.back:hover {
  color: var(--text);
}