:root {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: #14141e;
  color: #f2f2f5;
  font-family: -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-brand {
  font-size: 18px;
  font-weight: 700;
}

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-link {
  padding: 6px 14px;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: rgba(255, 255, 255, 0.65);
  font-size: 13px;
  cursor: pointer;
}

.nav-link.active {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-weight: 600;
}

.page {
  max-width: 480px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

.section.hidden {
  display: none;
}

.section h1 {
  margin: 40px 0 8px;
  font-size: 28px;
  text-align: center;
}

.tagline {
  margin: 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  text-align: center;
}

.card {
  margin-bottom: 20px;
  padding: 18px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.card h2 {
  margin: 0 0 8px;
  font-size: 15px;
}

.hint {
  margin: 0 0 12px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
  line-height: 1.5;
}

.row {
  display: flex;
  gap: 8px;
}

input[type='text'] {
  flex: 1;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

button {
  padding: 10px 18px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(90deg, #5ac882, #5aa0ff);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

button:disabled {
  background: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.4);
  cursor: not-allowed;
}

.status {
  margin: 10px 0 0;
  font-size: 12px;
  color: rgba(120, 220, 160, 0.9);
  min-height: 16px;
}

.status.error {
  color: #ff9494;
}

.catalog-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.catalog-empty {
  padding: 20px 0;
  color: rgba(255, 255, 255, 0.45);
  font-size: 13px;
  text-align: center;
}

.catalog-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
}

.catalog-item-info {
  min-width: 0;
}

.catalog-item-label {
  font-size: 14px;
  font-weight: 600;
}

.catalog-item-price {
  margin-top: 2px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
}

.order-note {
  margin-top: 8px;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.5);
}