:root {
  --bg: #f5f6fa;
  --card: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --border: #e5e7eb;
  --ok: #16a34a;
  --err: #dc2626;
  --radius: 10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* 认证页 */
.auth-body {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
}
.auth-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: 0 8px 30px rgba(0,0,0,.08);
  padding: 36px 40px;
  width: 380px;
}
.auth-card h1 { font-size: 22px; margin-bottom: 4px; }
.auth-card .subtitle { color: var(--muted); font-size: 13px; margin-bottom: 20px; }
.auth-card label { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 4px; }
.auth-card input {
  width: 100%; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 6px;
  font-size: 14px;
}
.auth-card input:focus { outline: 2px solid var(--primary); border-color: transparent; }
.auth-card button {
  width: 100%; margin-top: 20px; padding: 11px;
  background: var(--primary); color: #fff; border: 0; border-radius: 6px;
  font-size: 15px; cursor: pointer;
}
.auth-card button:hover { background: var(--primary-dark); }
.hint { margin-top: 14px; font-size: 12px; color: var(--muted); }

/* 顶栏 */
.topbar {
  background: var(--card); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px;
}
.brand { font-weight: 700; font-size: 17px; }
.userbox { display: flex; align-items: center; gap: 12px; }
.userbox .email { color: var(--muted); font-size: 13px; }
.inline-form { display: inline; }

/* 页签 */
.tabs {
  display: flex; gap: 4px; padding: 10px 24px 0;
  background: var(--card); border-bottom: 1px solid var(--border);
}
.tab {
  padding: 10px 18px; border: 0; background: transparent;
  font-size: 14px; cursor: pointer; color: var(--muted);
  border-bottom: 2px solid transparent;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

/* 主区 */
.container { max-width: 960px; margin: 24px auto; padding: 0 24px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.tab-panel h2 { font-size: 18px; margin-bottom: 16px; }

.form-row { display: flex; gap: 12px; align-items: center; margin-bottom: 16px; flex-wrap: wrap; }
.form-col { display: flex; flex-direction: column; gap: 10px; max-width: 360px; margin-bottom: 16px; }
.form-col input { padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
.form-row input, .form-row select {
  padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px;
}
.form-row input:focus, .form-col input:focus, .form-row select:focus {
  outline: 2px solid var(--primary); border-color: transparent;
}

.btn {
  padding: 10px 18px; border: 0; border-radius: 6px;
  font-size: 14px; cursor: pointer;
}
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--muted); }
.btn.ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn.danger { background: transparent; border: 1px solid var(--err); color: var(--err); }

/* 提示 */
.alert { padding: 10px 14px; border-radius: 6px; font-size: 14px; margin: 10px 0; }
.alert.error { background: #fef2f2; color: var(--err); border: 1px solid #fecaca; }
.alert.ok { background: #f0fdf4; color: var(--ok); border: 1px solid #bbf7d0; }
.alert.info { background: #eff6ff; color: var(--primary); border: 1px solid #bfdbfe; }

/* 生成结果 */
.result-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; margin-top: 8px;
}
.result-card .barcode-text { font-size: 22px; letter-spacing: 1px; font-weight: 700; margin-bottom: 8px; }
.result-card svg { max-width: 100%; height: auto; display: block; }
.result-meta { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 10px; font-size: 13px; color: var(--muted); }

/* 历史 */
.history-list { display: flex; flex-direction: column; gap: 8px; }
.history-item {
  background: var(--card); border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.history-item .code { font-weight: 600; font-size: 15px; }
.history-item .meta { color: var(--muted); font-size: 12px; }
.history-item svg { height: 44px; width: auto; }
.pager { display: flex; align-items: center; justify-content: center; gap: 16px; margin-top: 16px; }
.pager span { color: var(--muted); font-size: 13px; }

/* 号段表 */
.ranges-table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 8px; overflow: hidden; }
.ranges-table th, .ranges-table td { padding: 10px 12px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--border); }
.ranges-table th { background: #f9fafb; color: var(--muted); font-weight: 600; }
.ranges-table tr:last-child td { border-bottom: 0; }

/* ── 信封设计 ─────────────────────────────── */
.env-layout { display: flex; gap: 32px; flex-wrap: wrap; align-items: flex-start; }
.env-form { flex: 1 1 280px; max-width: 360px; }
.env-form h3 { font-size: 14px; color: var(--muted); margin: 14px 0 6px; }
.env-preview-wrap { flex: 1 1 320px; }

/* 预览信封：125×176mm，按屏幕缩放（比例 1:1.41 ≈ 0.6 倍显示） */
.env-preview {
  position: relative;
  width: 320px;              /* 预览宽度 */
  height: calc(320px * 176 / 125);
  background: #fdfcf7;
  border: 1px solid #c9c4b8;
  box-shadow: 0 4px 16px rgba(0,0,0,.08);
  font-family: "SimSun", "Songti SC", serif;
  margin-bottom: 8px;
}
/* 贴票位：右上角 */
.env-stamp-zone {
  position: absolute;
  top: 8%; right: 5%;
  width: 18%; height: 22%;
  border: 1.5px dashed #b0a898;
  border-radius: 2px;
  display: flex; align-items: center; justify-content: center;
  color: #b0a898; font-size: 10px;
}
.env-stamp-zone::after { content: "贴票位"; }
/* 收件人：中间偏下 */
.env-recipient {
  position: absolute;
  left: 12%; top: 38%;
  display: flex; flex-direction: column; gap: 4px;
}
.env-zip-top { font-size: 13px; letter-spacing: 4px; color: #333; }
.env-name { font-size: 15px; font-weight: 700; color: #111; }
.env-addr { font-size: 12px; color: #444; max-width: 60%; line-height: 1.5; }
/* 寄件人：右下角小字 */
.env-sender {
  position: absolute;
  right: 5%; bottom: 8%;
  text-align: right; font-size: 10px; color: #666;
  display: flex; flex-direction: column; gap: 2px;
}
/* 条码区：底部中央 */
.env-barcode-zone {
  position: absolute;
  left: 50%; bottom: 12%;
  transform: translateX(-50%);
  text-align: center;
}
.env-barcode-zone svg { height: 52px; width: auto; display: block; }
.env-barcode-text { font-size: 10px; letter-spacing: 1px; color: #222; font-family: monospace; margin-top: 2px; }

/* ── 打印样式：B6 信封 125×176mm ──────────── */
@page {
  size: 125mm 176mm;
  margin: 0;
}
@media print {
  body.printing * { visibility: hidden; }
  body.printing .env-preview, body.printing .env-preview * { visibility: visible; }
  body.printing .env-preview {
    position: absolute;
    left: 0; top: 0;
    width: 125mm;
    height: 176mm;
    border: none;
    box-shadow: none;
    margin: 0;
  }
  /* 打印时按 mm 调整字号（预览缩放的逆运算） */
  body.printing .env-stamp-zone { font-size: 3.2mm; }
  body.printing .env-zip-top { font-size: 4.5mm; }
  body.printing .env-name { font-size: 5mm; }
  body.printing .env-addr { font-size: 4mm; }
  body.printing .env-sender { font-size: 3.2mm; }
  body.printing .env-barcode-zone svg { height: 16mm; }
  body.printing .env-barcode-text { font-size: 3mm; }
}