:root {
  color-scheme: dark;
  --bg: #0b0f14;
  --surface: #121820;
  --surface-2: #171e28;
  --border: #243041;
  --text: #c5d0dc;
  --text-soft: #9aa8b8;
  --muted: #6b7a8c;
  --accent: #2dd4bf;
  --accent-dim: rgba(45, 212, 191, 0.14);
  --danger: #f87171;
  --radius: 14px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
}

body {
  padding: 16px 16px 28px;
}

.page {
  max-width: 480px;
  margin: 0 auto;
}

.pay {
  padding: 0 16px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 2px);
  overflow: hidden;
}

.pay__header {
  margin: 0 -16px 16px;
  padding: 16px 16px 14px;
  background: linear-gradient(145deg, var(--surface-2), var(--surface));
  border-bottom: 1px solid var(--border);
}

.pay__eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
}

.pay__title {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.45;
  color: var(--muted);
}

.pay__hint {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.45;
}

.pay__hint--tight {
  margin-top: -4px;
  margin-bottom: 16px;
  font-size: 0.82rem;
}

.pay__hint strong {
  color: var(--text-soft);
  font-weight: 600;
}

.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
  margin-bottom: 14px;
}

.preset {
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-soft);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.9rem;
  cursor: pointer;
}

.preset--active {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
}

.field {
  display: block;
  margin-bottom: 8px;
}

.field:first-of-type {
  margin-bottom: 16px;
}

.field__label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.82rem;
}

.field__input {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-soft);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 1.1rem;
  outline: none;
}

.field__input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.amount-error {
  margin: 0 0 10px;
  color: var(--danger);
  font-size: 0.85rem;
}

.btn-pay {
  width: 100%;
  border: none;
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  color: #042f2e;
  background: linear-gradient(135deg, #5eead4, #2dd4bf);
  text-transform: lowercase;
}

.btn-pay:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.blocked {
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 2px);
}

.blocked__text {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
  text-align: center;
}