:root {
  --bg: #F4F8FA;
  --bg-raised: #E9F1F5;
  --ink: #1E293B;
  --ink-dim: #64748B;
  --teal: #0891B2;
  --pink: #EC4899;
  --purple: #8B5CF6;
  --divider: #DCE6EC;
  --display: 'Space Grotesk', Helvetica, Arial, sans-serif;
  --body: 'Inter', Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.topbar { padding: 20px 0; border-bottom: 1px solid var(--divider); }
.topbar-inner { max-width: 720px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; }
.logo { font-family: var(--display); font-weight: 700; font-size: 20px; letter-spacing: -0.01em; color: var(--ink); }
.logo-dot { color: var(--teal); }

.hero { max-width: 720px; margin: 0 auto; padding: 64px 24px 40px; text-align: center; }
.eyebrow { font-family: var(--body); font-size: 12.5px; color: var(--ink-dim); letter-spacing: 0.06em; text-transform: uppercase; margin: 0 0 14px; }
.hero-title { font-family: var(--display); font-weight: 700; font-size: clamp(30px, 5.5vw, 48px); line-height: 1.1; margin: 0 0 20px; color: var(--ink); }
.hero-sub { font-size: 15.5px; color: var(--ink-dim); max-width: 480px; margin: 0 auto 8px; line-height: 1.7; }
.price-badge {
  display: inline-block; margin-top: 20px; padding: 8px 20px;
  border: 1px solid var(--teal); border-radius: 20px; color: var(--teal);
  font-family: var(--display); font-weight: 600; font-size: 14px;
}

.container { max-width: 620px; margin: 0 auto; padding: 0 24px 100px; }
.card { background: #fff; border: 1px solid var(--divider); border-radius: 10px; padding: 32px 34px; margin-bottom: 24px; }

.field { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; }
.field label { font-family: var(--body); font-size: 11px; letter-spacing: 0.06em; color: var(--ink-dim); text-transform: uppercase; }
.field input {
  background: var(--bg); border: 1px solid var(--divider); color: var(--ink);
  font-family: var(--body); font-size: 15px; padding: 13px 16px; border-radius: 6px; outline: none;
}
.field input:focus { border-color: var(--teal); }

.btn-primary {
  width: 100%; background: var(--teal); color: #fff; border: none;
  font-family: var(--display); font-weight: 700; font-size: 15px; padding: 16px;
  border-radius: 6px; cursor: pointer;
}
.btn-primary:disabled { opacity: 0.6; cursor: wait; }
.btn-primary:hover:not(:disabled) { background: #076e88; }

.status-msg { font-size: 13px; margin-top: 12px; text-align: center; min-height: 16px; }
.status-msg.error { color: var(--pink); }
.status-msg.success { color: var(--teal); }

.section-title { font-family: var(--display); font-weight: 700; font-size: 21px; color: var(--ink); margin: 0 0 16px; }

.preview-item { padding: 12px 0; border-bottom: 1px solid var(--divider); display: flex; justify-content: space-between; align-items: center; }
.preview-item:last-child { border-bottom: none; }
.preview-label { font-size: 12.5px; color: var(--ink-dim); margin: 0; }
.preview-value { font-family: var(--display); font-size: 17px; font-weight: 700; margin: 0; }

.locked-box {
  background: rgba(8,145,178,0.06); border: 1px dashed rgba(8,145,178,0.3);
  border-radius: 8px; padding: 22px 24px; margin-bottom: 24px;
}
.locked-title { font-family: var(--body); font-weight: 700; font-size: 13px; color: var(--teal); margin: 0 0 12px; }
.locked-box ul { margin: 0; padding-left: 18px; }
.locked-box li { font-size: 13.5px; color: var(--ink-dim); margin-bottom: 8px; }

footer { text-align: center; font-size: 12px; color: var(--ink-dim); padding: 40px 24px; }
footer a { color: var(--ink-dim); }

.pay-tabs { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.pay-tab { padding: 10px 18px; border: 1px solid var(--divider); border-radius: 20px; font-size: 13px; font-weight: 600; cursor: pointer; color: var(--ink-dim); }
.pay-tab.active { border-color: var(--teal); color: var(--teal); background: rgba(8,145,178,0.06); }
.pay-panel { display: none; }
.pay-panel.active { display: block; }
.amount { font-family: var(--display); font-weight: 700; color: var(--teal); }
.price-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 0; border-bottom: 1px solid var(--divider); margin-bottom: 20px; font-size: 15px;
}

.topbar-products-link { font-size: 12.5px; font-weight: 700; color: var(--teal); text-decoration: none; letter-spacing: 0.02em; }
.topbar-products-link:hover { text-decoration: underline; }

.product-links-card {
  max-width: 640px; margin: 32px auto; padding: 20px 24px;
  background: var(--bg-raised); border: 1px solid var(--divider); border-radius: 10px;
}
.product-links-title {
  text-align: center; font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ink-dim); margin: 0 0 14px;
}
.product-links-grid {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 8px;
}
.product-links-grid a {
  padding: 9px 16px; border-radius: 8px; font-size: 11.5px; font-weight: 700;
  letter-spacing: 0.02em; text-decoration: none; color: var(--ink); background: var(--bg);
  border: 1px solid var(--divider); white-space: nowrap;
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.product-links-grid a:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.12);
}
.product-links-grid a.current {
  background: var(--teal); color: #fff; border-color: var(--teal);
  box-shadow: 0 2px 8px rgba(8,145,178,0.35);
}