:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1f2933;
  --muted: #6b7280;
  --line: #e2e5ea;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --ok: #15803d;
  --bad: #b91c1c;
  --warn: #b45309;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1 { font-size: 22px; margin: 0 0 14px; }
h2 { font-size: 17px; margin: 0 0 12px; }

.topbar {
  background: #ffffff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 16px 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand { font-weight: 700; color: var(--text); font-size: 16px; }

.nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px 10px;
  display: flex;
  gap: 14px;
  overflow-x: auto;
  white-space: nowrap;
}

.nav a { color: var(--muted); font-size: 14px; padding: 2px 0; }
.nav a:hover { color: var(--accent); }

.shell { max-width: 1100px; margin: 0 auto; padding: 16px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}

.card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }

.notice { padding: 10px 12px; border-radius: 8px; margin-bottom: 14px; border: 1px solid; }
.notice.ok, .banner.ok { background: #eefbf2; color: var(--ok); border-color: #b7e4c7; }
.notice.bad { background: #fdecec; color: var(--bad); border-color: #f5c2c2; }
.notice.info { background: #eef4ff; color: var(--accent-dark); border-color: #c7d7fe; }

.banner { padding: 11px 13px; border-radius: 8px; margin-bottom: 16px; border: 1px solid; }
.banner.warn { background: #fff8e6; color: var(--warn); border-color: #f2d48c; }

.stats { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin-bottom: 16px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 12px; }
.stat span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 4px; }
.stat strong { font-size: 22px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 620px; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-size: 13px; font-weight: 600; }
tr:last-child td { border-bottom: none; }
code { background: #f1f3f5; padding: 1px 5px; border-radius: 4px; font-size: 13px; }

.nowrap { white-space: nowrap; }
.muted { color: var(--muted); }
.reply-cell { max-width: 260px; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; }
.badge.sent { background: #eefbf2; color: var(--ok); }
.badge.skipped { background: #f1f3f5; color: var(--muted); }
.badge.error { background: #fdecec; color: var(--bad); }

.btn {
  display: inline-block;
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--text);
  padding: 8px 13px;
  border-radius: 7px;
  font-size: 14px;
  cursor: pointer;
}

.btn:hover { border-color: #c9ced6; text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-dark); }
.btn.ghost { background: transparent; }
.btn.small { padding: 5px 10px; font-size: 13px; }
.btn.wide { width: 100%; }

.link { background: none; border: none; padding: 0; color: var(--accent); cursor: pointer; font-size: 14px; }
.link.danger { color: var(--bad); }
.inline { display: inline; margin-left: 8px; }

.stack { display: flex; flex-direction: column; gap: 12px; }

.grid-form { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid-form.inner { margin-top: 10px; }
.span-2 { grid-column: 1 / -1; }

label { display: block; font-size: 14px; color: var(--muted); }
label.check { display: flex; align-items: center; gap: 7px; color: var(--text); }

input, select, textarea {
  width: 100%;
  margin-top: 4px;
  padding: 8px 9px;
  border: 1px solid #cfd4dc;
  border-radius: 7px;
  font: inherit;
  background: #fff;
  color: var(--text);
}

input[type="checkbox"] { width: auto; margin: 0; }
textarea { resize: vertical; }

fieldset { border: 1px solid var(--line); border-radius: 8px; padding: 10px; }
legend { padding: 0 5px; color: var(--muted); font-size: 13px; }
.check-list { display: grid; grid-template-columns: 1fr 1fr; gap: 7px 12px; }

.form-actions { display: flex; gap: 10px; align-items: center; margin-top: 6px; }
.filter-form { display: flex; flex-wrap: wrap; gap: 12px; align-items: end; }
.filter-form label { min-width: 150px; }

.login-wrap { min-height: 75vh; display: grid; place-items: center; }
.login-card { width: min(420px, 100%); }
.login-card h1 { margin-bottom: 6px; }
.login-card .muted { margin-top: 0; }

.kv { display: grid; grid-template-columns: 110px 1fr; gap: 6px 12px; margin: 0 0 12px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }

@media (max-width: 720px) {
  .shell { padding: 12px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .grid-form { grid-template-columns: 1fr; }
  .check-list { grid-template-columns: 1fr; }
  h1 { font-size: 20px; }
  .card { padding: 13px; }
}