:root {
  --bg-1: #f8f4ea;
  --bg-2: #efe4c8;
  --panel: #fffdf7;
  --ink: #1f1a12;
  --muted: #5c5547;
  --accent: #b85a1f;
  --accent-strong: #8a3f13;
  --border: #e5d7b6;
  --ok: #0f7b3e;
  --error: #b83232;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 20%, #fff8e1 0%, transparent 35%),
    radial-gradient(circle at 85% 80%, #f6d8a8 0%, transparent 30%),
    linear-gradient(135deg, var(--bg-1), var(--bg-2));
  min-height: 100vh;
}

.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 20px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.hero {
  text-align: center;
}

.hero h1 {
  margin: 0 0 10px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
}

.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.checkout-card {
  margin-top: auto;
  padding: 24px;
  border-radius: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: 0 14px 34px rgba(93, 61, 19, 0.14);
}

.checkout-card h2 {
  margin: 0 0 16px;
  font-size: 1.35rem;
}

.label {
  display: inline-block;
  margin-bottom: 8px;
  font-weight: 600;
}

.amount-row {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
}

.currency {
  padding: 0 14px;
  font-size: 1.1rem;
  color: var(--accent-strong);
  font-weight: 700;
}

#amount {
  border: none;
  outline: none;
  padding: 14px 12px 14px 0;
  width: 100%;
  font-size: 1.1rem;
  color: var(--ink);
}

.hint {
  margin: 8px 0 14px;
  color: var(--muted);
  font-size: 0.92rem;
}

#message {
  min-height: 22px;
  margin-bottom: 10px;
  font-size: 0.95rem;
}

#message.success {
  color: var(--ok);
}

#message.error {
  color: var(--error);
}

.paypal-container {
  margin-top: 12px;
}

@media (max-width: 560px) {
  .page {
    padding: 30px 14px;
    gap: 22px;
  }

  .checkout-card {
    padding: 18px;
  }
}