:root {
  --primary-color: #007bff;
  --primary-hover: #0056b3;
  --text-color: #333;
  --bg-color: #f4f7f6;
  --form-bg: #ffffff;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  background: var(--form-bg);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
  width: 100%;
  max-width: 500px;
}

h1 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--text-color);
}

.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
}

input, textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 1rem;
  box-sizing: border-box;
  transition: border-color 0.2s;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

.submit-btn {
  width: 100%;
  padding: 0.8rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s;
}

.submit-btn:hover {
  background-color: var(--primary-hover);
}

@media (max-width: 480px) {
  .container {
    padding: 1.5rem;
    margin: 1rem;
  }
}