:root {
  color-scheme: dark;
  --color-background: #0b0f14;
  --color-surface: rgba(17, 24, 39, 0.75);
  --color-border: rgba(148, 163, 184, 0.2);
  --color-primary: #7c3aed;
  --color-primary-strong: #8b5cf6;
  --color-accent: #06b6d4;
  --color-text-primary: #f8fafc;
  --color-text-secondary: #94a3b8;
  --color-input: rgba(15, 23, 42, 0.75);
  --color-input-border: rgba(100, 116, 139, 0.35);
  --color-input-focus-ring: rgba(124, 58, 237, 0.35);
  --color-success: #22c55e;
  --color-error: #ef4444;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI',
    sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(
      800px 400px at 20% -10%,
      rgba(124, 58, 237, 0.25),
      transparent
    ),
    radial-gradient(
      800px 400px at 80% -10%,
      rgba(6, 182, 212, 0.2),
      transparent
    ),
    var(--color-background);
  color: var(--color-text-primary);
  font-family: inherit;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1.5rem, 3vw, 3rem);
}

.page {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card {
  width: min(1024px, 100%);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 28px;
  padding: clamp(2rem, 4vw, 3rem);
  backdrop-filter: blur(18px);
  box-shadow: 0 40px 80px -45px rgba(15, 23, 42, 0.85);
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.card__header {
  display: grid;
  gap: 0.75rem;
}

.card__eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.card__header h1 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 2.8rem);
  font-weight: 700;
}

.card__header p {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 1rem;
}

.form {
  display: grid;
  gap: 1.5rem;
}

.form__group {
  display: grid;
  gap: 0.5rem;
}

.form__row {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

label,
legend {
  font-weight: 600;
  color: var(--color-text-primary);
}

legend {
  font-size: 0.95rem;
}

.input-wrapper {
  position: relative;
}

input[type='text'],
input[type='email'],
input[type='password'],
input[type='number'],
input[type='date'] {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: 16px;
  border: 1px solid var(--color-input-border);
  background: var(--color-input);
  color: var(--color-text-primary);
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  appearance: none;
}

input::placeholder {
  color: rgba(148, 163, 184, 0.65);
}

input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-input-focus-ring);
}

input[type='number']::-webkit-outer-spin-button,
input[type='number']::-webkit-inner-spin-button {
  margin: 0;
}

input[type='number'] {
  -moz-appearance: textfield;
}

input[type='date']::-webkit-calendar-picker-indicator {
  cursor: pointer;
  color: var(--color-text-secondary);
  opacity: 0.75;
  filter: invert(0.7);
}

.match-indicator {
  position: absolute;
  right: 0.95rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.match-indicator--show {
  opacity: 1;
}

.match-indicator--valid {
  color: var(--color-success);
}

.match-indicator--invalid {
  color: var(--color-error);
}

.password-hints {
  position: absolute;
  right: 0;
  bottom: calc(100% + 0.45rem);
  width: min(240px, 70vw);
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid var(--color-input-border);
  border-radius: 16px;
  padding: 0.65rem 0.85rem;
  font-size: 0.85rem;
  box-shadow: 0 20px 40px -24px rgba(15, 23, 42, 0.9);
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.2rem);
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 2;
}

.password-hints[data-visible='true'] {
  opacity: 1;
  transform: translateY(-0.2rem);
}

.password-hints__title {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-secondary);
}

.password-hints ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.password-hints li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.15rem 0;
  color: var(--color-text-primary);
}

.password-hints__status {
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  line-height: 1;
  color: #0b0f14;
  background: var(--color-error);
  transition: background 0.2s ease;
}

.password-hints__item--met .password-hints__status {
  background: var(--color-success);
}

.form__group--inline {
  border: 1px solid var(--color-input-border);
  border-radius: 18px;
  padding: 1rem;
  gap: 0.75rem;
  background: rgba(15, 23, 42, 0.55);
}

.form__group--inline legend {
  margin-bottom: 0.35rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
}

.radio {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

.radio input[type='radio'] {
  appearance: none;
  width: 1rem;
  height: 1rem;
  border-radius: 999px;
  border: 2px solid rgba(148, 163, 184, 0.45);
  background: transparent;
  position: relative;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.radio input[type='radio']:checked {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-input-focus-ring);
}

.radio input[type='radio']:checked::after {
  content: '';
  position: absolute;
  inset: 3px;
  background: var(--color-primary);
  border-radius: inherit;
}

.plans {
  border: 1px solid var(--color-input-border);
  border-radius: 22px;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  display: grid;
  gap: 1.25rem;
  background: rgba(15, 23, 42, 0.55);
}

.plans legend {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--color-text-secondary);
}

.plans__hint {
  color: var(--color-text-secondary);
  margin: 0;
  font-size: 0.95rem;
}

.plans__container {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.plan-card {
  position: relative;
  display: block;
}

.plan-card input[type='radio'] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.plan-card__content {
  border: 2px solid rgba(124, 58, 237, 0.2);
  border-radius: 20px;
  padding: 1.5rem;
  background: rgba(15, 23, 42, 0.75);
  display: grid;
  gap: 0.65rem;
  min-height: 190px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.plan-card__badge {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.plan-card__title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
}

.plan-card__price {
  margin: 0;
  font-weight: 600;
  color: var(--color-text-primary);
}

.plan-card__description {
  margin: 0;
  color: var(--color-text-secondary);
}

.plan-card:has(input[type='radio']:checked) .plan-card__content {
  border-color: var(--color-primary-strong);
  box-shadow: 0 18px 45px -20px rgba(124, 58, 237, 0.8);
  transform: translateY(-4px);
}

.btn {
  padding: 0.95rem 1.75rem;
  border-radius: 16px;
  border: none;
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: var(--color-text-primary);
  box-shadow: 0 20px 45px -20px rgba(124, 58, 237, 0.8);
}

.btn--primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
}

.feedback {
  min-height: 1.5rem;
  font-weight: 500;
}

.feedback--success {
  color: var(--color-success);
}

.feedback--error {
  color: var(--color-error);
}

.verification {
  margin-top: 1.25rem;
  padding: 1.25rem;
  border-radius: 18px;
  border: 1px dashed rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.03);
}

.verification[hidden] {
  display: none;
}

.verification__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.verification__eyebrow {
  margin: 0;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.7rem;
  color: var(--color-text-secondary);
}

.verification__title {
  margin: 0.15rem 0;
  font-size: 1.15rem;
  color: var(--color-text-primary);
}

.verification__hint {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.verification__badge {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  font-size: 0.85rem;
  color: var(--color-text-primary);
}

.verification__actions {
  margin-top: 1rem;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: 1fr;
}

.verification__input {
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text-primary);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.verification__input:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.verification__feedback {
  min-height: 1.25rem;
  margin-top: 0.35rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.verification__feedback--error {
  color: var(--color-error);
}

.verification__feedback--success {
  color: var(--color-success);
}

.form .terms-consent {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-text-primary);
}

.form .terms-consent .checkbox {
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-primary);
}

.form .terms-consent__meta {
  color: var(--color-text-secondary);
  margin: 0;
}

.form .terms-consent .link-button {
  color: var(--color-primary);
}

@media (max-width: 720px) {
  .card {
    border-radius: 20px;
    padding: 1.75rem;
  }

  .form__row {
    grid-template-columns: 1fr;
  }
}