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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #f5f7fa;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.card {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  padding: 32px 24px;
}

header {
  text-align: center;
  margin-bottom: 28px;
}

.logo {
  font-size: 28px;
  font-weight: 700;
  color: #2563eb;
  margin-bottom: 8px;
}

.subtitle {
  color: #64748b;
  font-size: 15px;
}

h1 {
  font-size: 24px;
  margin-bottom: 8px;
  color: #0f172a;
}

h2 {
  font-size: 18px;
  margin: 24px 0 10px;
  color: #0f172a;
}

p, li {
  color: #334155;
  font-size: 15px;
}

ul {
  padding-left: 20px;
  margin-top: 8px;
}

li {
  margin-bottom: 6px;
}

.updated {
  font-size: 13px;
  color: #94a3b8;
  margin-bottom: 20px;
}

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

a:hover {
  text-decoration: underline;
}

.footer-links {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid #e2e8f0;
  text-align: center;
  font-size: 14px;
}

.footer-links a {
  margin: 0 10px;
}

label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: #334155;
  margin-bottom: 6px;
}

input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-size: 15px;
  margin-bottom: 16px;
}

input:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.btn {
  display: inline-block;
  width: 100%;
  padding: 12px 16px;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
}

.btn-primary {
  background: #2563eb;
  color: #fff;
}

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

.btn-danger {
  background: #dc2626;
  color: #fff;
}

.btn-danger:hover {
  background: #b91c1c;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.alert {
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 16px;
  display: none;
}

.alert.show {
  display: block;
}

.alert-success {
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.alert-error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.alert-info {
  background: #eff6ff;
  color: #1e40af;
  border: 1px solid #bfdbfe;
}

.warning-box {
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 20px;
  font-size: 14px;
  color: #9a3412;
}

.step {
  display: none;
}

.step.active {
  display: block;
}

@media (max-width: 600px) {
  .card {
    padding: 24px 16px;
  }
}