:root {
  --blue-900: #0369a1;
  --blue-500: #38bdf8;
  --blue-50: #eaf6ff;
  --gray-900: #111827;
  --gray-600: #4b5563;
  --gray-400: #9ca3af;
  --gray-100: #f9fafb;
  --white: #ffffff;
  --green-600: #059669;
  --red-600: #dc2626;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--gray-100);
  color: var(--gray-900);
  line-height: 1.5;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.content-shell {
  width: min(720px, calc(100% - 32px));
  margin: 32px auto 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.header {
  background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-500) 100%);
  padding: 28px 40px;
}

.brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.brand-logo {
  width: 48px;
  height: 48px;
  border-radius: 12px;
}

.brand-wordmark {
  height: 36px;
  width: auto;
}

.card {
  width: 100%;
  margin: 0;
  background: var(--white);
  border-radius: 0;
  box-shadow: none;
  padding: 36px 40px;
}

h1 {
  margin: 0 0 12px;
  font-size: 28px;
  line-height: 1.2;
}

.subline {
  margin: 0 0 28px;
  color: var(--gray-600);
  font-size: 15px;
}

.step + .step {
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid #e5e7eb;
}

.step-label {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--blue-900);
  margin-bottom: 16px;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
}

.help {
  margin: 0 0 12px;
  color: var(--gray-600);
  font-size: 14px;
}

.locked-note {
  margin-bottom: 20px;
}

.inline-field {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

input[type="email"],
input[type="text"] {
  flex: 1 1 220px;
  min-width: 0;
  padding: 12px 14px;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  font-size: 15px;
}

input:focus {
  outline: 2px solid rgba(56, 189, 248, 0.45);
  border-color: var(--blue-500);
}

fieldset {
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 16px 18px 18px;
  margin: 0 0 20px;
}

fieldset:disabled {
  opacity: 0.55;
}

legend {
  font-weight: 600;
  padding: 0 6px;
}

.radio-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  font-weight: 400;
  cursor: pointer;
}

.region-list {
  display: grid;
  gap: 10px;
}

.step.locked fieldset {
  pointer-events: none;
}

.collapsible[hidden] {
  display: none;
}

.btn {
  border: 0;
  border-radius: 10px;
  padding: 12px 18px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--blue-900);
  color: var(--white);
}

.btn-primary:hover:not(:disabled) {
  background: #025a8a;
}

.btn-secondary {
  background: #e5e7eb;
  color: var(--gray-900);
}

.btn-block {
  width: 100%;
  margin-top: 8px;
}

.status {
  margin-top: 12px;
  font-size: 14px;
}

.status.success {
  color: var(--green-600);
}

.status.error {
  color: var(--red-600);
}

.confirmation {
  text-align: center;
  padding: 12px 0 4px;
}

.confirmation-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: #d1fae5;
  color: var(--green-600);
  display: grid;
  place-items: center;
  font-size: 28px;
  font-weight: 700;
}

.confirmation h2 {
  margin: 0 0 10px;
}

.confirmation p {
  margin: 0;
  color: var(--gray-600);
}

.footer {
  margin-top: auto;
  text-align: center;
  padding: 24px 16px 32px;
  color: var(--gray-600);
  font-size: 13px;
}

.footer a {
  color: var(--blue-900);
}

.muted {
  color: var(--gray-400);
}

.otp-dialog {
  border: 0;
  border-radius: 16px;
  padding: 0;
  width: min(420px, calc(100% - 32px));
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.18);
}

.otp-dialog::backdrop {
  background: rgba(17, 24, 39, 0.45);
}

.otp-dialog form {
  padding: 24px;
}

.otp-dialog h3 {
  margin: 0 0 8px;
}

.otp-dialog input {
  width: 100%;
  margin-top: 12px;
  text-align: center;
  letter-spacing: 0.3em;
  font-size: 22px;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 18px;
}

@media (max-width: 640px) {
  .content-shell {
    margin-top: 20px;
  }

  .header {
    padding: 24px;
  }

  .card {
    padding: 28px 24px;
  }

  h1 {
    font-size: 24px;
  }

  .inline-field {
    flex-direction: column;
  }

  .inline-field .btn {
    width: 100%;
  }
}