:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #1c2430;
  --muted: #687386;
  --line: #dfe5ef;
  --primary: #1664d9;
  --primary-dark: #0f4fb4;
  --success-bg: #ecf8f0;
  --success: #12823f;
  --error-bg: #fff1f1;
  --error: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
}

a {
  color: var(--primary);
  word-break: break-all;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  padding: 18px 18px 10px;
}

.brand {
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
}

main {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 10px 16px 32px;
  flex: 1;
}

.hero-panel,
.content-panel,
.admin-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px 18px;
  box-shadow: 0 12px 32px rgba(38, 52, 80, 0.08);
}

.admin-panel.wide {
  max-width: 1160px;
}

.admin-panel.narrow {
  max-width: 480px;
  margin: 0 auto;
}

h1 {
  margin: 0 0 12px;
  font-size: 26px;
  line-height: 1.25;
}

h2 {
  margin: 0;
  font-size: 18px;
}

p {
  margin: 0 0 18px;
  color: var(--muted);
}

.query-form,
.admin-form {
  display: grid;
  gap: 12px;
}

label {
  color: var(--text);
  font-weight: 650;
}

input[type="tel"],
input[type="text"],
input[type="password"],
input:not([type]),
input[type="file"] {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 16px;
  background: #fff;
}

button,
.primary-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  border: 0;
  border-radius: 6px;
  padding: 0 18px;
  color: #fff;
  background: var(--primary);
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

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

.secondary-link {
  display: inline-block;
  margin-top: 18px;
  font-weight: 650;
  text-decoration: none;
}

.gift-list {
  display: grid;
  gap: 14px;
}

.gift-card,
.claim-box,
.upload-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  background: #fff;
}

.gift-card {
  display: grid;
  gap: 14px;
}

.muted,
dt {
  color: var(--muted);
  font-size: 13px;
}

dl {
  display: grid;
  gap: 10px;
  margin: 0;
}

dd {
  margin: 4px 0 0;
  font-weight: 650;
}

.body-text {
  color: var(--text);
}

.reason-list {
  margin: 0 0 18px;
  padding-left: 22px;
  color: var(--text);
}

.site-footer {
  padding: 18px 16px 24px;
  color: var(--muted);
  text-align: center;
  font-size: 12px;
}

.messages {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 0 16px 10px;
}

.message {
  border-radius: 6px;
  padding: 12px 14px;
  margin-bottom: 8px;
}

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

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

.admin-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-top: 12px;
  font-size: 14px;
}

.admin-nav a,
.link-button {
  color: var(--primary);
  background: transparent;
  min-height: auto;
  padding: 0;
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}

.admin-nav form {
  margin: 0;
}

.stats-grid,
.admin-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.stats-grid div {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}

.stats-grid strong {
  display: block;
  font-size: 26px;
}

.stats-grid span {
  color: var(--muted);
}

.upload-box {
  display: grid;
  gap: 12px;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 780px;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
  font-size: 14px;
}

th {
  background: #eef2f8;
  color: #334155;
  white-space: nowrap;
}

.error-list {
  margin: 16px 0;
  padding-left: 20px;
}

@media (max-width: 640px) {
  .site-header {
    padding-top: 14px;
  }

  main {
    padding-left: 12px;
    padding-right: 12px;
  }

  .hero-panel,
  .content-panel,
  .admin-panel {
    padding: 20px 14px;
  }

  h1 {
    font-size: 24px;
  }

  .stats-grid,
  .admin-grid {
    grid-template-columns: 1fr;
  }
}