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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #f8f9fa;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  background: #0f172a;
  color: white;
  padding: 40px 0 30px;
  text-align: center;
}

header h1 {
  font-size: 1.8rem;
  font-weight: 600;
}

.tagline {
  margin-top: 8px;
  opacity: 0.85;
  font-size: 1.05rem;
}

main {
  padding: 40px 0;
}

.hero {
  text-align: center;
  margin-bottom: 32px;
}

.hero h2 {
  font-size: 2rem;
  margin-bottom: 12px;
  color: #0f172a;
}

.signup-card {
  background: white;
  border-radius: 12px;
  padding: 32px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  margin-bottom: 40px;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  font-weight: 500;
  margin-bottom: 6px;
}

input[type="text"],
input[type="email"] {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 1rem;
}

input:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

.checkbox-group {
  margin: 24px 0;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-weight: 400;
  font-size: 0.95rem;
  cursor: pointer;
}

.checkbox-label input {
  margin-top: 4px;
  flex-shrink: 0;
}

.required {
  color: #dc2626;
}

.btn-primary {
  width: 100%;
  background: #2563eb;
  color: white;
  border: none;
  padding: 14px;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-primary:hover {
  background: #1d4ed8;
}

.success {
  text-align: center;
  padding: 20px 0;
  color: #166534;
}

.hidden {
  display: none;
}

.info ul {
  margin: 12px 0 16px 20px;
}

.info .small,
.small {
  font-size: 0.875rem;
  color: #6b7280;
}

footer {
  background: #f1f5f9;
  padding: 24px 0;
  text-align: center;
  font-size: 0.9rem;
  color: #475569;
}

footer a {
  color: #2563eb;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

.privacy h2 {
  margin: 28px 0 10px;
  font-size: 1.3rem;
}

.privacy ul {
  margin: 8px 0 16px 20px;
}

.privacy p {
  margin-bottom: 12px;
}

@media (max-width: 600px) {
  .signup-card {
    padding: 24px 18px;
  }
  header h1 {
    font-size: 1.5rem;
  }
  .hero h2 {
    font-size: 1.6rem;
  }
}