* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: #f4f7f6;
  color: #333;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background-color: #1a365d;
  color: white;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

header nav a {
  color: white;
  text-decoration: none;
  font-weight: 500;
}

header nav a.active, header nav a:hover {
  text-decoration: underline;
  color: #e2e8f0;
}

.hero {
  background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('https://picsum.photos/1200/400') no-repeat center/cover;
  color: white;
  text-align: center;
  padding: 5rem 1rem;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
}

.features {
  display: flex;
  justify-content: space-around;
  padding: 3rem 1rem;
  gap: 1rem;
}

.card {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  width: 30%;
  text-align: center;
}

.container {
  max-width: 1000px;
  margin: 2rem auto;
  padding: 0 1rem;
  flex: 1;
}

.grid-rooms {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.room-card {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  border-top: 4px solid #1a365d;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.price {
  font-size: 1.25rem;
  font-weight: bold;
  color: #2b6cb0;
  margin: 0.5rem 0;
}

.form-card {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  margin-top: 1rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.form-group input, .form-group select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 4px;
}

.btn, .btn-sm {
  background-color: #2b6cb0;
  color: white;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

.btn-sm {
  padding: 0.5rem 1rem;
  margin-top: 1rem;
}

.btn:hover, .btn-sm:hover {
  background-color: #1a365d;
}

.alert {
  margin-top: 1.5rem;
  padding: 1rem;
  background-color: #c6f6d5;
  color: #22543d;
  border: 1px solid #9ae6b4;
  border-radius: 4px;
}

.hidden {
  display: none;
}

footer {
  background-color: #1a365d;
  color: white;
  text-align: center;
  padding: 1rem;
  margin-top: auto;
}