:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --line: #dfe6ef;
  --line-strong: #cfd9e6;
  --text: #1d2735;
  --muted: #75849a;
  --label: #65758b;
  --primary: #246bfd;
  --primary-dark: #1753cc;
  --success: #16a34a;
  --success-bg: #dcfce7;
  --danger: #dc2626;
  --warning: #b45309;
  --shadow: 0 16px 40px rgba(31, 48, 73, 0.08);
  --radius: 14px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.5;
}
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
a { color: var(--primary); text-decoration: none; }
.hidden { display: none !important; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px 24px;
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  color: #fff;
  background: linear-gradient(135deg, #246bfd, #6b8cff);
  box-shadow: 0 7px 18px rgba(36,107,253,.25);
}
.top-actions { display: flex; align-items: center; gap: 10px; }
.user-email { max-width: 260px; overflow: hidden; text-overflow: ellipsis; color: var(--muted); font-size: 14px; }

.page-shell { max-width: 1600px; margin: 0 auto; padding: 24px; }
.admin-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; align-items: start; }
.admin-grid > * { min-width: 0; }
.stack { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; }
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}
.card-head h2, .card-head h3 { margin: 0; font-size: 19px; }
.card-body { padding: 20px; }
.section-title { margin: 0 0 14px; font-size: 16px; }

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; }
.form-group { display: grid; gap: 7px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { color: #44546a; font-size: 14px; font-weight: 650; }
.form-control {
  width: 100%;
  min-height: 42px;
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  outline: none;
  background: #fff;
  color: var(--text);
  transition: border-color .16s ease, box-shadow .16s ease;
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(36,107,253,.12); }
textarea.form-control { min-height: 88px; resize: vertical; }
.inline-input { display: grid; grid-template-columns: 1fr auto; gap: 8px; }
.help-text { margin: 0; color: var(--muted); font-size: 12px; }

.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 7px;
  min-height: 40px;
  padding: 9px 15px;
  border: 1px solid transparent;
  border-radius: 9px;
  font-weight: 700;
  transition: .16s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }
.btn-primary { color: #fff; background: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { color: #334155; background: #fff; border-color: var(--line-strong); }
.btn-danger { color: var(--danger); background: #fff; border-color: #fecaca; }
.btn-success { color: #fff; background: var(--success); }
.btn-link { padding: 5px 7px; min-height: 32px; border: 0; background: transparent; color: var(--primary); }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

.alert { padding: 12px 14px; border-radius: 10px; font-size: 14px; margin-bottom: 14px; }
.alert-info { color: #1e40af; background: #eff6ff; border: 1px solid #bfdbfe; }
.alert-success { color: #166534; background: #f0fdf4; border: 1px solid #bbf7d0; }
.alert-danger { color: #991b1b; background: #fef2f2; border: 1px solid #fecaca; }
.alert-warning { color: #92400e; background: #fffbeb; border: 1px solid #fde68a; }

.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 28px; }
.login-card { width: min(430px, 100%); padding: 28px; }
.login-card h1 { margin: 0 0 8px; font-size: 26px; }
.login-card .sub { color: var(--muted); margin: 0 0 20px; }
.login-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 18px; }
.login-tab { border: 1px solid var(--line); background: #fff; padding: 9px; border-radius: 9px; }
.login-tab.active { border-color: var(--primary); color: var(--primary); background: #eff6ff; }

.receipt-wrap { position: static; min-width: 0; }
.receipt-toolbar { display: flex; flex-wrap: wrap; gap: 10px; padding: 14px; border-bottom: 1px solid var(--line); }
.receipt-canvas { overflow: auto; padding: 18px; background: #eef2f7; border-radius: 0 0 var(--radius) var(--radius); }
.receipt {
  width: 1100px;
  min-height: 760px;
  margin: 0 auto;
  padding: 16px 32px 30px;
  background: #fff;
  color: #111827;
  border-radius: 4px;
  box-shadow: 0 8px 30px rgba(31,41,55,.08);
}
.receipt-title { text-align: center; font-size: 24px; font-weight: 800; margin: 0 0 48px; letter-spacing: 2px; }
.receipt-section { margin-bottom: 30px; }
.receipt-section h3 { margin: 0 0 20px; color: #1f3552; font-size: 21px; }
.detail-table { width: 100%; border-collapse: collapse; table-layout: fixed; }
.detail-table th, .detail-table td { border: 1px solid #d7dee8; padding: 13px 18px; min-height: 50px; vertical-align: middle; }
.detail-table th { width: 18%; color: #66758a; background: #fafbfd; font-weight: 500; text-align: left; }
.detail-table td { font-size: 17px; word-break: break-word; }
.detail-table .wide-label { width: 15%; }
.payment-pill { display: inline-flex; align-items: center; gap: 8px; }
.pay-dot { width: 25px; height: 25px; display: inline-grid; place-items: center; border-radius: 50%; background: #1fc967; color: #fff; font-size: 12px; font-weight: 900; }
.status-tags { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.tag { display: inline-flex; align-items: center; padding: 4px 10px; border-radius: 6px; font-size: 14px; font-weight: 700; }
.tag-green { color: #16a34a; background: #e9fbea; }
.tag-red { color: #dc2626; background: #fee2e2; }
.delivery-box { border: 1px solid #d7dee8; }
.delivery-head { padding: 13px 18px; border-bottom: 1px solid #d7dee8; font-size: 18px; font-weight: 700; }
.delivery-content { margin: 13px 22px 20px; padding: 16px 26px; border: 1px solid #d7dee8; border-radius: 8px; font-size: 17px; white-space: pre-wrap; word-break: break-word; }
.verify-strip { display: grid; grid-template-columns: 1fr 118px; gap: 20px; align-items: center; padding: 16px 20px; border: 1px dashed #b9c8dc; background: #fbfdff; }
.verify-strip h4 { margin: 0 0 6px; color: #1f3552; }
.verify-strip p { margin: 4px 0; color: #536278; font-size: 14px; word-break: break-all; }
.qr-box { width: 112px; height: 112px; display: grid; place-items: center; background: #fff; }
.qr-box img, .qr-box canvas { max-width: 100%; max-height: 100%; }
.receipt-foot { margin-top: 20px; color: #94a3b8; font-size: 12px; text-align: center; }

.upload-box { border: 1px dashed #b8c7da; border-radius: 10px; padding: 14px; background: #f8fbff; }
.upload-preview { width: 100%; max-height: 240px; object-fit: contain; margin-top: 10px; border-radius: 8px; background: #fff; }
.progress { height: 8px; border-radius: 999px; overflow: hidden; background: #e5e7eb; margin-top: 10px; }
.progress > span { display: block; height: 100%; width: 0; background: var(--primary); transition: width .2s ease; }

.history-tools { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 14px; }
.history-tools .form-control { min-width: 180px; flex: 1; }
.table-scroll { overflow: auto; }
.history-table { width: 100%; min-width: 760px; border-collapse: collapse; }
.history-table th, .history-table td { border-bottom: 1px solid var(--line); padding: 11px 10px; text-align: left; font-size: 13px; }
.history-table th { color: var(--label); background: #fafbfd; position: sticky; top: 0; }
.empty { padding: 30px 10px; text-align: center; color: var(--muted); }

.verify-page { min-height: 100vh; padding: 28px 18px 60px; }
.verify-shell { max-width: 900px; margin: 0 auto; }
.verify-hero { text-align: center; margin: 18px 0 24px; }
.verify-hero h1 { margin: 0 0 8px; font-size: 30px; }
.verify-hero p { margin: 0; color: var(--muted); }
.verify-search { display: grid; grid-template-columns: 1fr auto; gap: 10px; padding: 18px; }
.verify-result { padding: 24px; }
.verify-status { text-align: center; padding: 22px 12px; }
.status-icon { width: 64px; height: 64px; display: grid; place-items: center; margin: 0 auto 12px; border-radius: 50%; font-size: 30px; }
.status-icon.ok { color: #fff; background: var(--success); }
.status-icon.bad { color: #fff; background: var(--danger); }
.verify-status h2 { margin: 0 0 6px; }
.verify-status p { color: var(--muted); margin: 0; }
.verify-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.verify-item { display: grid; grid-template-columns: 130px 1fr; min-height: 52px; border-bottom: 1px solid var(--line); }
.verify-item:nth-child(odd) { border-right: 1px solid var(--line); }
.verify-item .k { padding: 13px; color: var(--label); background: #fafbfd; }
.verify-item .v { padding: 13px; word-break: break-word; }
.verify-meta { color: var(--muted); font-size: 12px; text-align: center; margin-top: 14px; }

.toast-container { position: fixed; right: 18px; bottom: 18px; z-index: 100; display: grid; gap: 10px; }
.toast { min-width: 260px; max-width: 380px; padding: 12px 14px; color: #fff; border-radius: 9px; box-shadow: 0 12px 30px rgba(15,23,42,.24); animation: toast-in .18s ease; }
.toast.info { background: #334155; }
.toast.success { background: #15803d; }
.toast.error { background: #b91c1c; }
@keyframes toast-in { from { transform: translateY(10px); opacity: 0; } }

.loading-cover { position: fixed; inset: 0; z-index: 200; display: grid; place-items: center; background: rgba(248,250,252,.85); backdrop-filter: blur(3px); }
.spinner { width: 42px; height: 42px; border: 4px solid #dbeafe; border-top-color: var(--primary); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 700px) {
  .page-shell { padding: 12px; }
  .topbar { padding: 11px 13px; }
  .user-email { display: none; }
  .form-grid { grid-template-columns: 1fr; }
  .form-group.full { grid-column: auto; }
  .card-body { padding: 15px; }
  .verify-search { grid-template-columns: 1fr; }
  .verify-list { grid-template-columns: 1fr; }
  .verify-item:nth-child(odd) { border-right: 0; }
  .receipt-canvas { padding: 10px; }
  .receipt { transform-origin: top left; }
}