:root {
  color-scheme: light;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #eef2f7;
  color: #1a2640;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 2rem;
  background: #fff;
  border-bottom: 1px solid rgba(38, 62, 117, 0.08);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand-title {
  font-size: 1.2rem;
  font-weight: 700;
}

.brand-subtitle {
  margin-top: 0.25rem;
  color: #556680;
  font-size: 0.95rem;
}

.login-btn {
  background: #2563eb;
  color: #fff;
  border: none;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
}

.page-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.status-banner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  border-radius: 14px;
  background: #e8f0ff;
  color: #1c3b82;
  text-align: center;
  box-shadow: 0 12px 34px rgba(16, 45, 105, 0.08);
}

.panel {
  margin: 2rem auto 1.5rem;
  padding-bottom: 1rem;
  text-align: center;
}

.panel h1 {
  margin: 0;
  color: #0f172a;
  font-size: clamp(2rem, 3vw, 2.5rem);
}

.panel p {
  margin: 0.5rem auto 0;
  color: #475569;
  max-width: 640px;
}

.rooms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.room-card {
  background: #fff;
  border-radius: 24px;
  padding: 1.75rem;
  box-shadow: 0 20px 54px rgba(15, 23, 42, 0.08);
}

.room-card h2 {
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 1.4rem;
  color: #1f2937;
}

.room-card label {
  display: block;
  margin-top: 1rem;
  margin-bottom: 0.45rem;
  color: #475569;
  font-weight: 600;
}

.room-card input[type="text"],
.room-card input[type="number"] {
  width: 100%;
  padding: 0.95rem 1rem;
  border-radius: 12px;
  border: 1px solid #d2dce8;
  background: #f8fafc;
  color: #102a43;
  font-size: 1rem;
}

.room-card input[type="text"]:read-only {
  background: #f8fafc;
}

.room-card button {
  border: none;
  border-radius: 11px;
  padding: 0.95rem 0;
  font-size: 1rem;
  cursor: pointer;
  font-weight: 700;
  color: #fff;
  background: #2563eb;
  margin-top: 1rem;
  width: 100%;
}

.room-card button:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

@media (max-width: 640px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
  }
}