* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --line: #e6e9ef;
  --text: #1f2733;
  --muted: #6b7686;
  --primary: #2f6bff;
  --primary-d: #1f53d6;
  --green: #1aa86b;
  --amber: #d98800;
  --danger: #e1483b;
}
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", Segoe UI, Roboto, sans-serif;
  background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.5;
}
button { font-family: inherit; cursor: pointer; }
.btn {
  background: var(--primary); color: #fff; border: none; border-radius: 8px;
  padding: 8px 16px; font-size: 14px; transition: background .15s;
}
.btn:hover { background: var(--primary-d); }
.btn.ghost { background: #eef2fb; color: var(--primary); }
.btn.ghost:hover { background: #e0e8fb; }
.btn.line { background: #fff; color: var(--text); border: 1px solid var(--line); }
.btn.line:hover { background: #f3f5f9; }
input, select {
  font-family: inherit; font-size: 14px; padding: 8px 10px;
  border: 1px solid var(--line); border-radius: 8px; background: #fff; color: var(--text);
}
input:focus, select:focus { outline: none; border-color: var(--primary); }

/* login */
#login-view {
  min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px;
}
.login-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 32px; width: 360px; box-shadow: 0 8px 30px rgba(20,40,80,.06);
}
.login-card h1 { font-size: 20px; margin-bottom: 4px; }
.login-card .sub { color: var(--muted); margin-bottom: 22px; font-size: 13px; }
.login-card label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.login-card input { width: 100%; margin-bottom: 16px; }
.login-card .err { color: var(--danger); font-size: 13px; min-height: 18px; margin-bottom: 8px; }

/* layout */
#main-view { display: none; max-width: 1100px; margin: 0 auto; padding: 22px 18px 60px; }
.topbar { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.topbar h1 { font-size: 19px; flex: 1; }
.topbar .who { color: var(--muted); font-size: 13px; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px; margin-bottom: 16px;
}
.card h2 { font-size: 15px; margin-bottom: 14px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

.stats { display: flex; gap: 14px; flex-wrap: wrap; }
.stat { flex: 1; min-width: 140px; background: #fafbfe; border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.stat .n { font-size: 26px; font-weight: 700; }
.stat .l { color: var(--muted); font-size: 13px; margin-top: 2px; }
.stat.total .n { color: var(--primary); }
.stat.signed .n { color: var(--green); }
.stat.pending .n { color: var(--amber); }
.stat.overdue .n { color: var(--danger); }

/* nav tabs */
.navtabs { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.navtab { background: #fff; border: none; padding: 7px 16px; color: var(--text); border-right: 1px solid var(--line); font-size: 14px; }
.navtab:last-child { border-right: none; }
.navtab.active { background: var(--primary); color: #fff; }

/* mail panel */
.statusbox { font-size: 13px; background: #fafbfe; border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; line-height: 1.7; }
.statusbox .ok { color: var(--green); font-weight: 600; }
.statusbox .warn { color: var(--amber); font-weight: 600; }
.statusbox code { background: #eef1f6; padding: 1px 5px; border-radius: 4px; font-size: 12px; }
.splist { margin-top: 12px; display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 10px; }
.sprow { display: flex; align-items: center; gap: 10px; background: #fafbfe; border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; }
.sprow label { min-width: 92px; font-weight: 600; font-size: 13px; }
.sprow input { flex: 1; }
.ovtable { margin-top: 10px; overflow-x: auto; }
.ovtable table { font-size: 13px; }
.row-overdue { background: #fff6f4; }
.code { background: #eef1f6; padding: 1px 5px; border-radius: 4px; font-size: 12px; font-family: ui-monospace, Menlo, Consolas, monospace; }

.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 12px; }
.toolbar .seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.toolbar .seg button { background: #fff; border: none; padding: 7px 14px; color: var(--text); border-right: 1px solid var(--line); }
.toolbar .seg button:last-child { border-right: none; }
.toolbar .seg button.active { background: var(--primary); color: #fff; }
.toolbar input[type=search] { flex: 1; min-width: 180px; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--muted); font-weight: 600; background: #fafbfe; }
td .mono { font-family: ui-monospace, Menlo, Consolas, monospace; }
.badge { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; }
.badge.pending { background: #fff4e0; color: var(--amber); }
.badge.signed { background: #e3f7ee; color: var(--green); }
.linkbtn { color: var(--primary); background: none; border: none; padding: 0; font-size: 13px; }
.sigthumb { height: 34px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }

/* 审计日志 */
.auditlist { margin-top: 12px; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.auditrow { display: grid; grid-template-columns: 170px 120px 1fr 140px; gap: 8px; padding: 8px 12px; border-bottom: 1px solid var(--line); font-size: 13px; align-items: baseline; }
.auditrow:nth-child(even) { background: #fafbfe; }
.auditrow:last-child { border-bottom: none; }
.auditrow .at { color: var(--muted); font-variant-numeric: tabular-nums; }
.auditrow .ac { font-weight: 600; color: var(--primary); }
.auditrow .ad { color: var(--text); word-break: break-all; }
.auditrow .aip { color: var(--muted); font-size: 12px; text-align: right; }
.empty { text-align: center; color: var(--muted); padding: 30px; }
.tip { color: var(--muted); font-size: 12.5px; margin-top: 8px; }
#toast {
  position: fixed; left: 50%; bottom: 30px; transform: translateX(-50%);
  background: #1f2733; color: #fff; padding: 10px 18px; border-radius: 10px; font-size: 13px;
  opacity: 0; transition: opacity .2s; pointer-events: none; z-index: 99;
}
#toast.show { opacity: .95; }