:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --brand: #2563eb;
  --danger: #dc2626;
  --radius: 14px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  padding-bottom: env(safe-area-inset-bottom);
}

a { color: var(--brand); }

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  background: #0f172a;
  color: #f8fafc;
  padding-top: calc(10px + env(safe-area-inset-top));
}

.brand { display: flex; align-items: center; gap: 8px; min-width: 0; }
.topbar h1 { font-size: 16px; margin: 0; font-weight: 600; white-space: nowrap; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: #22c55e; flex: 0 0 auto; }
.topbar-actions { display: flex; gap: 6px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  min-height: 42px;
}
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.danger { background: #fff; border-color: var(--danger); color: var(--danger); }
.btn.ghost { background: rgba(255, 255, 255, .1); border-color: rgba(255, 255, 255, .25); color: #f8fafc; }
.btn.block { width: 100%; }
.btn.disabled { opacity: .45; pointer-events: none; }
.btn:active { transform: scale(.98); }

.wrap { max-width: 760px; margin: 0 auto; padding: 14px; }

.filters { display: flex; gap: 8px; margin: 4px 0 12px; flex-wrap: wrap; }
.filters input[type="search"] { flex: 1 1 180px; min-width: 0; }
.filters select { flex: 0 0 auto; }

input, select, textarea {
  font: inherit;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  min-height: 42px;
  width: 100%;
}

.count { color: var(--muted); font-size: 13px; margin: 0 2px 8px; }

.list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.card-link { display: block; padding: 14px; text-decoration: none; color: inherit; }
.card h2 {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.4;
  font-weight: 600;
  overflow-wrap: anywhere;
}
.meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; font-size: 12.5px; color: var(--muted); }
.meta .src {
  background: #eef2ff;
  color: #4338ca;
  border-radius: 999px;
  padding: 1px 8px;
  font-weight: 600;
}
.preview {
  margin: 8px 0 0;
  color: #475569;
  font-size: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  overflow-wrap: anywhere;
}

.pager { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin: 16px 0; }
.pager-info { color: var(--muted); font-size: 13px; }

.empty { background: #fff; border: 1px dashed var(--line); border-radius: var(--radius); padding: 18px; }
.hint-label { color: var(--muted); font-size: 13px; }
.hint {
  background: #0f172a;
  color: #e2e8f0;
  padding: 12px;
  border-radius: 10px;
  font-size: 12px;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* ---------- 阅读页 ---------- */
.message {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}
.msg-title { font-size: 21px; line-height: 1.35; margin: 0 0 8px; overflow-wrap: anywhere; }
.msg-actions { display: flex; gap: 8px; margin: 14px 0 6px; flex-wrap: wrap; }
.msg-actions .btn { flex: 1 1 auto; }

.markdown { margin-top: 14px; overflow-wrap: anywhere; }
.markdown h1, .markdown h2, .markdown h3, .markdown h4 { line-height: 1.35; margin: 1.2em 0 .5em; }
.markdown h1 { font-size: 22px; }
.markdown h2 { font-size: 19px; }
.markdown h3 { font-size: 17px; }
.markdown p { margin: .7em 0; }
.markdown ul, .markdown ol { padding-left: 1.4em; }
.markdown li { margin: .3em 0; }
.markdown blockquote {
  margin: .8em 0;
  padding: .3em .9em;
  border-left: 3px solid var(--brand);
  background: #f8fafc;
  color: #475569;
}
.markdown code {
  background: #f1f5f9;
  border-radius: 5px;
  padding: .1em .35em;
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: .9em;
  overflow-wrap: anywhere;
}
.markdown pre {
  background: #0f172a;
  color: #e2e8f0;
  padding: 12px;
  border-radius: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.markdown pre code { background: none; padding: 0; color: inherit; font-size: 12.5px; white-space: pre; }
.markdown table {
  width: 100%;
  border-collapse: collapse;
  margin: .9em 0;
  font-size: 14px;
  display: block;
  overflow-x: auto;
}
.markdown th, .markdown td { border: 1px solid var(--line); padding: 7px 9px; text-align: left; vertical-align: top; }
.markdown th { background: #f8fafc; white-space: nowrap; }
.markdown a { overflow-wrap: anywhere; }
.markdown hr { border: 0; border-top: 1px solid var(--line); margin: 1.4em 0; }

.danger-zone { margin-top: 26px; padding-top: 16px; border-top: 1px solid var(--line); }
.danger-zone .btn { width: 100%; }

.offscreen {
  position: absolute;
  left: -9999px;
  top: 0;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 18px 0 26px; }

/* ---------- 登录 ---------- */
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; }
.login-card { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 22px; width: 100%; max-width: 380px; }
.login-card h1 { font-size: 20px; margin: 0 0 6px; }
.login-sub { color: var(--muted); font-size: 13px; margin: 0 0 16px; }
.login-error { background: #fef2f2; border: 1px solid #fecaca; color: #b91c1c; border-radius: 10px; padding: 9px 12px; font-size: 14px; margin: 0 0 14px; }
.login-form { display: grid; gap: 8px; }
.login-form label { font-size: 13px; color: var(--muted); }
.login-form input { font-size: 20px; letter-spacing: .18em; text-align: center; }
.login-form input[type="password"], .login-form input:not([maxlength]) { font-size: 15px; letter-spacing: normal; text-align: left; }
.login-alt { margin-top: 16px; font-size: 14px; }
.login-alt summary { cursor: pointer; color: var(--muted); padding: 6px 0; }
.login-alt .login-form { margin-top: 8px; }
.login-foot { color: var(--muted); font-size: 12px; margin: 16px 0 0; }

.error-page { text-align: center; padding-top: 60px; }
.error-page h1 { font-size: 44px; margin: 0 0 6px; color: var(--muted); }

@media (min-width: 620px) {
  .wrap { padding: 20px; }
  .msg-actions .btn { flex: 0 0 auto; }
  .danger-zone .btn { width: auto; }
}

/* compose box (added 2026-11-07) */
.compose {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 10px 14px;
  margin: 0 0 14px;
}
.compose summary {
  cursor: pointer;
  font-weight: 600;
  color: #0f172a;
  padding: 4px 0;
  list-style: none;
}
.compose summary::-webkit-details-marker { display: none; }
.compose summary::after { content: " +"; color: #64748b; }
.compose[open] summary::after { content: " −"; }
.compose form { display: grid; gap: 10px; margin-top: 10px; }
.compose input[type="text"],
.compose textarea {
  width: 100%;
  box-sizing: border-box;
  font: inherit;
  padding: 10px 12px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  background: #f8fafc;
  color: #0f172a;
}
.compose textarea {
  resize: vertical;
  min-height: 140px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 14px;
  line-height: 1.6;
}
.compose .btn { justify-self: start; }
.form-error { color: #b91c1c; margin: 0; font-size: 14px; }