:root {
  color-scheme: light;
  --ink: #1f2d3d;
  --muted: #7b899c;
  --line: #e9edf3;
  --accent: #2563eb;
  --accent-soft: #f1f6fe;
  --danger: #e11d48;
  --bg: #f4f6fa;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Microsoft YaHei", "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
}
a { text-decoration: none; color: inherit; }
.muted { color: var(--muted); font-size: 13.5px; }

/* ---------- Login ---------- */
.login-body {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #eef2fb 0%, #e7eefc 100%);
}
.login-card {
  background: #fff; width: 340px; padding: 38px 34px 30px;
  border-radius: 20px; box-shadow: 0 20px 50px rgba(30,45,80,.14);
  display: flex; flex-direction: column;
}
.login-emoji { font-size: 40px; text-align: center; }
.login-card h1 { text-align: center; font-size: 24px; margin: 8px 0 2px; }
.login-sub { text-align: center; color: var(--muted); margin: 0 0 18px; font-size: 14px; }
.login-card label { font-size: 13px; color: #51607a; margin: 10px 0 5px; font-weight: 600; }
.login-card input {
  padding: 11px 13px; border: 1px solid #dde3ec; border-radius: 10px; font-size: 15px;
}
.login-card input:focus { outline: none; border-color: var(--accent); }
.login-card button {
  margin-top: 20px; padding: 12px; background: var(--accent); color: #fff;
  border: none; border-radius: 10px; font-size: 16px; font-weight: 700; cursor: pointer;
}
.login-card button:hover { background: #1d4fd8; }
.login-back { text-align: center; margin-top: 16px; color: var(--muted); font-size: 13px; }

/* ---------- Top bar ---------- */
.admin-top {
  background: #fff; border-bottom: 1px solid var(--line);
  padding: 0 26px; height: 60px; display: flex; align-items: center;
  justify-content: space-between; position: sticky; top: 0; z-index: 10;
}
.admin-brand { font-weight: 800; font-size: 17px; }
.admin-nav { display: flex; gap: 18px; align-items: center; }
.admin-nav a { color: #51607a; font-size: 14px; }
.admin-nav a:hover { color: var(--accent); }
.admin-nav .logout { color: var(--danger); }
.admin-main { max-width: 1000px; margin: 0 auto; padding: 28px 22px 70px; }

/* ---------- Flash ---------- */
.flash { padding: 12px 16px; border-radius: 10px; margin-bottom: 16px; font-size: 14px; }
.flash.ok { background: #e7f7ee; color: #0f7a43; }
.flash.error { background: #fdeaef; color: var(--danger); }

/* ---------- Page head ---------- */
.page-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 22px; gap: 14px; flex-wrap: wrap;
}
.page-head h1 { font-size: 24px; margin: 0; }
.head-actions { display: flex; gap: 10px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 5px; cursor: pointer;
  border: 1px solid transparent; border-radius: 9px; font-size: 14px;
  padding: 9px 15px; font-weight: 600; background: #eef2f8; color: #334155;
}
.btn:hover { filter: brightness(.97); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #1d4fd8; }
.btn-light { background: #fff; border-color: #dde3ec; color: #51607a; }
.btn-danger { background: #fdeaef; color: var(--danger); }
.btn-danger:hover { background: #fbdce4; }
.btn-mini { padding: 6px 11px; font-size: 13px; }
form { margin: 0; }

/* ---------- Category block ---------- */
.adm-cat {
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  padding: 18px 20px; margin-bottom: 18px; box-shadow: 0 6px 18px rgba(30,45,80,.04);
}
.adm-cat-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.adm-cat-title { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 800; }
.adm-cat-icon { font-size: 24px; }
.adm-cat-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.adm-cat-desc { margin: 8px 0 0; }
.badge {
  background: var(--accent-soft); color: var(--accent); font-size: 12px;
  font-weight: 700; padding: 2px 9px; border-radius: 999px;
}

/* ---------- Table ---------- */
.adm-table { width: 100%; border-collapse: collapse; margin-top: 12px; }
.adm-table tr { border-top: 1px solid var(--line); }
.adm-table td { padding: 12px 8px; vertical-align: middle; }
.t-icon { font-size: 22px; width: 36px; }
.t-main { width: 100%; }
.t-title { font-weight: 700; font-size: 15.5px; }
.t-sum { margin-top: 2px; }
.t-date { white-space: nowrap; font-size: 12.5px; }
.t-act { white-space: nowrap; display: flex; gap: 6px; justify-content: flex-end; }

.empty-state { text-align: center; color: var(--muted); padding: 60px 0; }

/* ---------- Edit form ---------- */
.edit-form {
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  padding: 24px; box-shadow: 0 6px 18px rgba(30,45,80,.04);
}
.field { display: flex; flex-direction: column; margin-bottom: 18px; }
.field-row { display: flex; gap: 16px; }
.field label { font-size: 13.5px; font-weight: 700; color: #51607a; margin-bottom: 6px; }
.field input, .field select, .field textarea {
  border: 1px solid #dde3ec; border-radius: 10px; padding: 11px 13px;
  font-size: 15px; font-family: inherit; background: #fff;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--accent);
}
.form-actions { display: flex; gap: 10px; margin-top: 8px; }

/* ---------- Markdown editor ---------- */
.editor-toolbar {
  display: flex; align-items: center; gap: 12px; margin-bottom: 8px;
  background: #f7f9fc; border: 1px solid #e6ebf2; border-radius: 10px; padding: 8px 12px;
}
.tool-btn {
  background: #fff; border: 1px solid #dde3ec; border-radius: 8px;
  padding: 6px 12px; cursor: pointer; font-size: 13.5px; font-weight: 600;
}
.tool-btn:hover { border-color: var(--accent); color: var(--accent); }
.editor-split { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
#content {
  min-height: 380px; resize: vertical; line-height: 1.7; font-size: 14.5px;
  font-family: "SF Mono", Menlo, Consolas, monospace;
}
.editor-preview {
  min-height: 380px; border: 1px solid #e6ebf2; border-radius: 10px;
  padding: 14px 18px; overflow-y: auto; background: #fff; max-height: 600px;
}

/* ---------- Markdown preview body ---------- */
.markdown-body { line-height: 1.8; font-size: 15px; color: #2b3a4d; }
.markdown-body h1 { font-size: 26px; margin: 8px 0 12px; }
.markdown-body h2 { font-size: 21px; margin: 22px 0 10px; }
.markdown-body h3 { font-size: 18px; }
.markdown-body img { max-width: 100%; border-radius: 10px; }
.markdown-body pre { background: #0f172a; color: #e2e8f0; padding: 14px; border-radius: 10px; overflow-x: auto; }
.markdown-body code { background: #f1f5f9; padding: 2px 6px; border-radius: 6px; color: #be185d; }
.markdown-body pre code { background: none; color: inherit; }
.markdown-body blockquote { border-left: 4px solid var(--accent); background: var(--accent-soft); margin: 14px 0; padding: 8px 16px; }
.markdown-body table { border-collapse: collapse; }
.markdown-body th, .markdown-body td { border: 1px solid #e2e8f0; padding: 6px 10px; }

@media (max-width: 720px) {
  .editor-split { grid-template-columns: 1fr; }
  .field-row { flex-direction: column; gap: 0; }
  .t-date { display: none; }
}