:root {
  --checkout-bg: #000000;
  --checkout-panel: #121212;
  --checkout-panel-2: #1a1a1a;
  --checkout-border: #2a2a2a;
  --checkout-text: #faf9fb;
  --checkout-muted: #919094;
  --checkout-green: #21dbaa;
  --checkout-green-soft: #b6fde3;
  --checkout-blue: #4ec5ff;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body.checkout-page {
  min-height: 100vh;
  background: var(--checkout-bg);
  color: var(--checkout-text);
  font-family: RobotoRegular, Roboto, Arial, sans-serif;
  overflow-x: hidden;
}

.checkout-shell {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 16px 56px;
}

.checkout-header {
  margin-bottom: 28px;
}

.checkout-logo img {
  display: block;
  height: 40px;
  width: auto;
}

.checkout-back {
  display: inline-block;
  margin-top: 18px;
  color: var(--checkout-text);
  text-decoration: none;
  font-size: 14px;
}

.checkout-back:hover {
  color: var(--checkout-green);
}

.checkout-title {
  margin: 18px 0 8px;
  font-size: clamp(28px, 5vw, 36px);
  line-height: 1.1;
  font-family: RobotoBold, Roboto, Arial, sans-serif;
}

.checkout-subtitle {
  margin: 0;
  color: var(--checkout-muted);
  font-size: 15px;
  line-height: 1.5;
}

.checkout-main {
  display: grid;
  gap: 24px;
}

.checkout-summary h2,
.checkout-form-section h2 {
  margin: 0 0 14px;
  font-size: 18px;
  font-family: RobotoBold, Roboto, Arial, sans-serif;
}

.summary-card,
.checkout-form-section,
.summary-total {
  background: var(--checkout-panel);
  border: 1px solid var(--checkout-border);
  border-radius: 16px;
}

.summary-card {
  padding: 18px;
}

.summary-item {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.summary-item__left {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.summary-item__icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #052c50;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.summary-item__name {
  margin: 0 0 4px;
  font-size: 16px;
  font-family: RobotoBold, Roboto, Arial, sans-serif;
}

.summary-item__meta {
  margin: 0;
  color: var(--checkout-muted);
  font-size: 13px;
}

.summary-item__right {
  text-align: right;
}

.summary-item__labels {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.summary-period {
  color: var(--checkout-green);
  font-size: 13px;
}

.summary-pill {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(33, 219, 170, 0.16);
  color: var(--checkout-green-soft);
  font-size: 12px;
  font-family: RobotoBold, Roboto, Arial, sans-serif;
}

.summary-price {
  margin: 0;
  font-size: 28px;
  line-height: 1;
  font-family: RobotoBold, Roboto, Arial, sans-serif;
}

.summary-note {
  margin: 8px 0 0;
  color: var(--checkout-muted);
  font-size: 11px;
}

.summary-total {
  padding: 16px 18px;
}

.summary-total__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  color: var(--checkout-muted);
}

.summary-total__box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border-radius: 12px;
  background: var(--checkout-panel-2);
  font-family: RobotoBold, Roboto, Arial, sans-serif;
}

.summary-total__box strong,
.summary-total__row strong {
  color: var(--checkout-text);
  font-size: 24px;
}

.checkout-form-section {
  padding: 20px 18px 24px;
}

.checkout-form-note,
.form-errors {
  margin: 0 0 18px;
  color: var(--checkout-muted);
  font-size: 13px;
  line-height: 1.5;
}

.form-errors {
  color: #ff8a8a;
}

.form-section-title {
  margin: 8px 0 14px;
  font-size: 15px;
  font-family: RobotoBold, Roboto, Arial, sans-serif;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-field span {
  font-size: 13px;
  color: var(--checkout-muted);
}

.form-field input {
  width: 100%;
  height: 48px;
  padding: 0 14px;
  border: 1px solid var(--checkout-border);
  border-radius: 12px;
  background: #0d0d0d;
  color: var(--checkout-text);
  font: inherit;
}

.form-field input:focus {
  outline: 2px solid rgba(33, 219, 170, 0.35);
  border-color: var(--checkout-green);
}

.form-field--full {
  grid-column: 1 / -1;
}

.checkout-submit {
  width: 100%;
  height: 52px;
  margin-top: 18px;
  border: none;
  border-radius: 999px;
  background: var(--checkout-green);
  color: #052c50;
  font: inherit;
  font-family: RobotoBold, Roboto, Arial, sans-serif;
  font-size: 16px;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.checkout-submit:hover {
  transform: translateY(-1px);
}

.checkout-submit:disabled {
  opacity: 0.6;
  cursor: wait;
  transform: none;
}

.checkout-submit--inline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  margin-top: 16px;
}

.checkout-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  display: grid;
  place-items: center;
  padding: 16px;
  z-index: 1000;
}

.checkout-modal[hidden] {
  display: none;
}

.checkout-modal__panel {
  width: min(100%, 420px);
  padding: 28px 24px;
  border-radius: 18px;
  background: var(--checkout-panel);
  border: 1px solid var(--checkout-border);
  text-align: center;
}

.checkout-modal__icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(33, 219, 170, 0.16);
  color: var(--checkout-green);
  font-size: 28px;
  font-family: RobotoBold, Roboto, Arial, sans-serif;
}

.checkout-modal__icon--failure {
  background: rgba(255, 107, 107, 0.16);
  color: #ff6b6b;
}

.checkout-modal--failure .checkout-submit--retry {
  margin-top: 18px;
}

.checkout-modal__back {
  display: inline-block;
  margin-top: 14px;
}

.checkout-modal__order {
  color: var(--checkout-muted);
}

@media (max-width: 640px) {
  .summary-item {
    flex-direction: column;
  }

  .summary-item__right {
    text-align: left;
  }

  .summary-item__labels {
    justify-content: flex-start;
  }

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