:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --border: #e3e6ea;
  --text: #1f2329;
  --muted: #8a909a;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger: #dc2626;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 56px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { font-size: 20px; font-weight: 700; color: var(--text); }
.brand:hover { text-decoration: none; }
.nav { display: flex; align-items: center; gap: 14px; font-size: 14px; }
.nav .who { color: var(--muted); }

.container { max-width: 760px; margin: 24px auto; padding: 0 16px; }
.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 32px 0; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 12px;
}

.post-item { display: block; }
.post-item:hover { text-decoration: none; border-color: #c9d4ee; }
.post-title { font-size: 17px; font-weight: 600; color: var(--text); margin: 0 0 6px; }
.meta { color: var(--muted); font-size: 13px; display: flex; gap: 14px; flex-wrap: wrap; }

.post-body, .reply-body {
  white-space: pre-wrap;
  word-break: break-word;
  margin: 12px 0;
}

h1.page-title { font-size: 22px; margin: 0 0 16px; }
h2.section { font-size: 16px; margin: 24px 0 12px; color: var(--muted); }

.btn {
  display: inline-block;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
}
.btn:hover { background: var(--accent-hover); text-decoration: none; }
.btn.secondary { background: #fff; color: var(--text); border-color: var(--border); }
.btn.danger { background: #fff; color: var(--danger); border-color: #f0c4c4; padding: 4px 10px; font-size: 13px; }
.btn.danger:hover { background: #fdecec; }
.btn:disabled { opacity: .6; cursor: not-allowed; }

.field { margin-bottom: 14px; }
.field label { display: block; font-size: 14px; margin-bottom: 6px; color: var(--muted); }
input[type=text], input[type=password], textarea, select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
textarea { resize: vertical; min-height: 120px; }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--accent); }

.row { display: flex; align-items: center; gap: 12px; }
.spread { justify-content: space-between; }
.actions { display: flex; gap: 10px; margin-top: 8px; }

.notice { padding: 10px 14px; border-radius: 8px; font-size: 14px; margin-bottom: 14px; }
.notice.error { background: #fdecec; color: var(--danger); border: 1px solid #f0c4c4; }
.notice.empty { color: var(--muted); text-align: center; padding: 40px 0; }

.pager { display: flex; justify-content: center; gap: 16px; align-items: center; margin: 20px 0; }
.pager .page-info { color: var(--muted); font-size: 14px; }

table.users { width: 100%; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; }
table.users th, table.users td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; }
table.users th { color: var(--muted); font-weight: 600; }
.tag { font-size: 12px; padding: 2px 8px; border-radius: 999px; background: #eef2ff; color: var(--accent); }
.tag.admin { background: #fef3c7; color: #b45309; }
.tag.off { background: #fee2e2; color: var(--danger); }

/* ---- tags / chips ---- */
.filterbar .tg-row { margin-top: 10px; }
.tg-row { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin: 8px 0; }
.tg-name { font-size: 14px; color: var(--muted); min-width: 72px; font-weight: 600; }
.hint { font-size: 12px; color: var(--muted); }
.clear-link { font-size: 13px; }

.chip {
  display: inline-block;
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  cursor: pointer;
  user-select: none;
}
.chip:hover { text-decoration: none; border-color: #c9d4ee; }
.chip.toggle.on { background: var(--accent); color: #fff; border-color: var(--accent); }
.chip.mini { font-size: 12px; padding: 1px 9px; background: #eef2ff; color: var(--accent); border-color: transparent; cursor: default; }
.chip.removable { background: #f1f3f5; }
.chip.removable:hover { background: #fde8e8; color: var(--danger); }
.chips.inline { display: inline-flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.post-item .chips.inline { margin-top: 10px; }