:root {
  color-scheme: light;
  --bg: #f3f7f4;
  --panel: #ffffff;
  --text: #18211c;
  --muted: #637168;
  --border: #dbe5dd;
  --primary: #167a55;
  --primary-dark: #0f6041;
  --danger: #c9343d;
  --danger-bg: #fff0f1;
  --success: #178a5a;
  --success-bg: #ecfff6;
  --focus: rgba(22, 122, 85, 0.22);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Tahoma, Arial, sans-serif;
  line-height: 1.7;
}

.page {
  width: min(100%, 560px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 32px 16px;
  display: flex;
  align-items: center;
}

.payment-box {
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 18px 50px rgba(24, 33, 28, 0.08);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  line-height: 1.35;
}

.subtitle {
  margin: 0 0 24px;
  color: var(--muted);
}

.payment-form {
  display: grid;
  gap: 10px;
}

label {
  font-weight: 700;
  margin-top: 8px;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 13px 14px;
  color: var(--text);
  background: #fff;
  font: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

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

textarea {
  resize: vertical;
}

button,
.link-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  margin-top: 14px;
  border: 0;
  border-radius: 8px;
  padding: 0 18px;
  background: var(--primary);
  color: #fff;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

button:hover,
.link-button:hover {
  background: var(--primary-dark);
}

.alert {
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 18px;
}

.alert p {
  margin: 0;
}

.alert-error {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(201, 52, 61, 0.25);
}

.result {
  text-align: center;
}

.status-mark {
  width: 68px;
  height: 68px;
  margin: 0 auto 18px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 40px;
  font-weight: 700;
}

.success .status-mark {
  color: var(--success);
  background: var(--success-bg);
}

.failed .status-mark {
  color: var(--danger);
  background: var(--danger-bg);
}

.details {
  margin: 22px 0;
  display: grid;
  gap: 10px;
  text-align: right;
}

.details div {
  display: grid;
  gap: 4px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  background: #fbfdfb;
}

dt {
  color: var(--muted);
  font-size: 0.9rem;
}

dd {
  margin: 0;
  overflow-wrap: anywhere;
  font-weight: 700;
}

@media (max-width: 420px) {
  .page {
    padding: 16px 12px;
  }

  .payment-box {
    padding: 22px 16px;
  }
}