:root {
  --bg-0:   #0a1b1b;
  --bg-1:   #142524;
  --bg-2:   #0b1414;
  --fg:     #f2f2f2;
  --fg-dim: #9bb0a8;
  --accent:       #1ce783;
  --accent-2:     #00ed82;
  --accent-soft:  rgba(28, 231, 131, 0.18);
  --accent-deep:  #01542e;
  --ok:  #1ce783;
  --err: #f50d0d;
  --card-bg: rgba(28, 231, 131, 0.04);
  --card-border: rgba(28, 231, 131, 0.14);
  --card-border-hover: rgba(28, 231, 131, 0.30);
  --radius: 18px;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(28, 231, 131, 0.10), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(1, 84, 46, 0.45), transparent 60%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-2) 100%);
  background-attachment: fixed;
  color: var(--fg);
  font-family: -apple-system, "SF Pro Display", "Inter", "Segoe UI", system-ui, sans-serif;
  font-variant-numeric: tabular-nums;
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.checkout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 56px 24px 96px;
}
.checkout__header { text-align: center; margin-bottom: 40px; }
.checkout__header h1 {
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.checkout__tagline { color: var(--fg-dim); margin: 0; }

.plan-select {
  position: relative;
}
.plan-select__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 14px 16px;
  background: rgba(255,255,255,.03);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  color: var(--fg);
  font: inherit;
  cursor: pointer;
  text-align: left;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.plan-select__trigger:hover { border-color: var(--card-border-hover); }
.plan-select[data-open="true"] .plan-select__trigger {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.plan-select__current {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.plan-select__current-label {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.005em;
}
.plan-select__current-meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--fg-dim);
}
.plan-select__current-price { color: var(--fg); font-weight: 500; }
.plan-select__current-bonus:not(:empty) {
  color: var(--ok);
  font-weight: 500;
}
.plan-select__current-bonus:not(:empty)::before {
  content: "·";
  margin-right: 8px;
  color: var(--fg-dim);
}
.plan-select__chevron {
  flex-shrink: 0;
  color: var(--fg-dim);
  transition: transform .18s ease, color .15s;
}
.plan-select[data-open="true"] .plan-select__chevron {
  transform: rotate(180deg);
  color: var(--accent);
}

.plan-select__options {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  z-index: 50;
  list-style: none;
  margin: 0;
  padding: 6px;
  background: linear-gradient(180deg, rgba(20, 37, 36, 0.98), rgba(11, 20, 20, 0.98));
  border: 1px solid var(--card-border-hover);
  border-radius: 14px;
  box-shadow: 0 24px 60px -16px rgba(0,0,0,.6),
              0 0 0 1px rgba(28,231,131,.06) inset;
  max-height: 360px;
  overflow-y: auto;
  animation: plan-options-in .14s ease-out;
}
@keyframes plan-options-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.plan-option {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 10px;
  cursor: pointer;
  transition: background .12s, color .12s;
}
.plan-option:hover { background: rgba(28, 231, 131, 0.07); }
.plan-option.is-selected {
  background: rgba(28, 231, 131, 0.12);
}
.plan-option.is-selected::after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(28, 231, 131, .18);
}
.plan-option__label {
  font-size: 14px;
  font-weight: 500;
  color: var(--fg);
}
.plan-option__meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  color: var(--fg-dim);
  text-align: right;
}
.plan-option__price { color: var(--fg); font-weight: 600; }
.plan-option__bonus { color: var(--ok); font-weight: 500; }
.plan-option.is-recommended .plan-option__label::after {
  content: "рекомендуем";
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #0a1b1b;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 999px;
  vertical-align: 2px;
  font-weight: 700;
}

@media (max-width: 520px) {
  .plan-option {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .plan-option__meta { text-align: left; }
  .plan-option.is-selected::after {
    position: absolute;
    top: 14px;
    right: 14px;
  }
}

.form {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  backdrop-filter: blur(20px);
}
.form__row { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.form__row label { font-size: 13px; color: var(--fg-dim); }
.form__row input, .form__row select {
  background: rgba(255,255,255,.03);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 12px 14px;
  color: var(--fg);
  font: inherit;
}
.form__row input:focus, .form__row select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.methods { display: flex; gap: 10px; flex-wrap: wrap; }
.method {
  flex: 1 1 0;
  min-width: 140px;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 14px;
  background: rgba(255,255,255,.03);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  cursor: pointer;
  color: var(--fg);
  user-select: none;
  font: inherit;
}
.method.is-selected {
  border-color: var(--accent);
  background: rgba(28, 231, 131, 0.08);
}
.method[aria-disabled="true"] { opacity: .35; cursor: not-allowed; }

.cta {
  display: block;
  width: 100%;
  margin-top: 18px;
  padding: 16px 18px;
  border: 0;
  border-radius: 16px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #0a1b1b;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  box-shadow: 0 10px 30px -12px rgba(28, 231, 131, .55);
  transition: transform .12s ease, box-shadow .2s ease, filter .2s ease;
}
.cta:hover:not([disabled]) {
  transform: translateY(-1px);
  box-shadow: 0 14px 36px -10px rgba(28, 231, 131, .65);
}
.cta:active:not([disabled]) { transform: translateY(0); }
.cta[disabled] {
  opacity: .45;
  cursor: not-allowed;
  background: rgba(28, 231, 131, 0.18);
  color: var(--fg-dim);
  box-shadow: none;
}

.footnote {
  text-align: center;
  color: var(--fg-dim);
  font-size: 13px;
  margin-top: 24px;
}

.result { display: grid; place-items: center; min-height: 100vh; padding: 24px; }
.result__box {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 480px;
  text-align: center;
}
.result__hint { color: var(--fg-dim); }
.result__back { display: inline-block; margin-top: 18px; }

/* Loading overlay shown while we generate the payment URL */
.pay-loader {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(10, 27, 27, 0.78);
  backdrop-filter: blur(8px);
  z-index: 9999;
  animation: pay-loader-fade .18s ease-out;
}
.pay-loader.is-active { display: flex; }
.pay-loader__box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  padding: 28px 36px;
  background: linear-gradient(180deg, rgba(20, 37, 36, 0.95), rgba(11, 20, 20, 0.95));
  border: 1px solid var(--card-border-hover);
  border-radius: 18px;
  box-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.6),
              0 0 0 1px rgba(28, 231, 131, 0.10) inset;
  min-width: 280px;
  text-align: center;
}
.pay-loader__spinner {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 3px solid rgba(28, 231, 131, 0.18);
  border-top-color: var(--accent);
  animation: pay-loader-spin .9s linear infinite;
}
.pay-loader__text {
  font-size: 15px;
  font-weight: 500;
  color: var(--fg);
  letter-spacing: -0.005em;
}
.pay-loader__hint {
  font-size: 12px;
  color: var(--fg-dim);
}
@keyframes pay-loader-spin { to { transform: rotate(360deg); } }
@keyframes pay-loader-fade { from { opacity: 0; } to { opacity: 1; } }