* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #fafafa;
  color: #1a1a1a;
  line-height: 1.6;
}

nav {
  background: #1a1a1a;
  padding: 0.75rem 1.5rem;
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

nav a, nav .nav-link {
  color: #ccc;
  text-decoration: none;
  font-size: 0.9rem;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

nav a:hover, nav .nav-link:hover { color: #fff; }

main { max-width: 800px; margin: 2rem auto; padding: 0 1.5rem; }

/* Login */
.login { text-align: center; margin-top: 20vh; }
.login h1 { margin-bottom: 2rem; font-weight: 300; font-size: 1.8rem; }
.login form { display: flex; flex-direction: column; gap: 0.75rem; max-width: 360px; margin: 0 auto; }
.login label { text-align: left; font-size: 0.85rem; color: #666; }
.login input {
  padding: 0.6rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}
.login button {
  padding: 0.6rem;
  background: #1a1a1a;
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
}
.login button:hover { background: #333; }
.error { color: #c00; margin-bottom: 1rem; }

/* Chat */
#messages {
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  background: #fff;
  height: 60vh;
  overflow-y: auto;
  padding: 1rem;
  margin-bottom: 1rem;
}

.msg { margin-bottom: 0.75rem; }
.msg-user { text-align: right; }
.msg-user .bubble { background: #e8f0fe; display: inline-block; padding: 0.5rem 0.75rem; border-radius: 12px; max-width: 80%; text-align: left; }
.msg-assistant .bubble { background: #f0f0f0; display: inline-block; padding: 0.5rem 0.75rem; border-radius: 12px; max-width: 80%; }
.msg-streaming .bubble { border-left: 2px solid #999; }

#chat-form {
  display: flex;
  gap: 0.5rem;
}

#chat-input {
  flex: 1;
  padding: 0.6rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}

#chat-form button {
  padding: 0.6rem 1.2rem;
  background: #1a1a1a;
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
}

#chat-form button:hover { background: #333; }
#chat-form button:disabled { background: #999; cursor: default; }

/* Admin */
table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
th, td { text-align: left; padding: 0.5rem; border-bottom: 1px solid #e0e0e0; }
th { font-weight: 600; font-size: 0.85rem; color: #666; text-transform: uppercase; }

.admin-form { margin: 1.5rem 0; }
.admin-form input, .admin-form textarea {
  padding: 0.5rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 0.95rem;
  width: 100%;
  margin-bottom: 0.5rem;
  font-family: inherit;
}
.admin-form textarea { min-height: 200px; resize: vertical; }
.admin-form button {
  padding: 0.5rem 1rem;
  background: #1a1a1a;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
.admin-form button:hover { background: #333; }

.token-display {
  background: #f5f5f5;
  padding: 1rem;
  border-radius: 4px;
  font-family: monospace;
  word-break: break-all;
  margin: 1rem 0;
}

h1 { font-weight: 400; margin-bottom: 1.5rem; }
h2 { font-weight: 400; margin: 1.5rem 0 0.75rem; font-size: 1.2rem; }