:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #1c2330;
  --muted: #6b7587;
  --line: #e2e6ed;
  --accent: #2563eb;
  --ok: #15803d;
  --ok-bg: #dcfce7;
  --off: #6b7587;
  --off-bg: #eceff4;
  --bad: #b91c1c;
  --bad-bg: #fee2e2;
  --warn-bg: #fef3c7;
  --warn: #92400e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141b;
    --card: #171e28;
    --text: #e6eaf0;
    --muted: #8d98aa;
    --line: #2a3442;
    --accent: #5b8def;
    --ok: #4ade80;
    --ok-bg: #12301f;
    --off: #8d98aa;
    --off-bg: #232c39;
    --bad: #f87171;
    --bad-bg: #3a1a1a;
    --warn-bg: #3a2e12;
    --warn: #fbbf24;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  padding: 20px 24px 8px;
  max-width: 1000px;
  margin: 0 auto;
}

h1 { margin: 0; font-size: 22px; }
.meta { color: var(--muted); font-size: 13px; display: flex; gap: 12px; flex-wrap: wrap; }

main { max-width: 1000px; margin: 0 auto; padding: 8px 24px 40px; }

.toolbar { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }

button {
  font: inherit;
  padding: 7px 14px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button:disabled { opacity: .5; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.danger { color: var(--bad); }
button.small { padding: 4px 10px; font-size: 13px; }

.banner {
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 12px;
  background: var(--warn-bg);
  color: var(--warn);
  white-space: pre-wrap;
}
.banner.error { background: var(--bad-bg); color: var(--bad); }
.banner.ok { background: var(--ok-bg); color: var(--ok); }

.table-wrap {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow-x: auto;
}

table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
tbody tr:last-child td { border-bottom: 0; }
.actions-col { text-align: right; }
td.actions { text-align: right; white-space: nowrap; }
td.actions button { margin-left: 4px; }

.name { font-weight: 600; }
.note { color: var(--muted); font-size: 13px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }
a { color: var(--accent); text-decoration: none; word-break: break-all; }
a:hover { text-decoration: underline; }

.badges { display: flex; gap: 6px; flex-wrap: wrap; }
.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.off { background: var(--off-bg); color: var(--off); }
.badge.bad { background: var(--bad-bg); color: var(--bad); }

dialog#dlg-logins { width: min(640px, calc(100vw - 32px)); }
.sub { margin: 14px 0 6px; font-size: 13px; color: var(--muted); font-weight: 600; }
dialog .table-wrap { max-height: 220px; overflow: auto; }
dialog th, dialog td { padding: 8px 12px; font-size: 13px; }

/* Trang đọc README */
.doc {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 8px 28px 24px;
  line-height: 1.65;
  overflow-wrap: anywhere;
}
.doc h1 { font-size: 24px; margin: 20px 0 10px; }
.doc h2 { font-size: 19px; margin: 30px 0 10px; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
.doc h3 { font-size: 16px; margin: 22px 0 8px; }
.doc p, .doc ul, .doc ol { margin: 8px 0; }
.doc blockquote { margin: 10px 0; padding: 2px 14px; border-left: 3px solid var(--accent); color: var(--muted); }
.doc code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .9em;
  background: var(--bg);
  padding: 1px 5px;
  border-radius: 4px;
}
.doc pre {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  overflow-x: auto;
}
.doc pre code { background: none; padding: 0; font-size: 13px; }
.doc table { display: block; overflow-x: auto; margin: 12px 0; }
.doc th { text-transform: none; letter-spacing: 0; font-size: 13px; background: var(--bg); }
.doc th, .doc td { border: 1px solid var(--line); vertical-align: top; }

.empty { padding: 28px; text-align: center; color: var(--muted); margin: 0; }

dialog {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  color: var(--text);
  padding: 22px;
  width: min(460px, calc(100vw - 32px));
}
dialog::backdrop { background: rgba(0, 0, 0, .45); }
dialog h2 { margin: 0 0 14px; font-size: 18px; }
dialog label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 12px; }
dialog input[type=text], dialog input[type=number], dialog input:not([type]) {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 8px 10px;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
}
dialog input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
label.check { display: flex; gap: 8px; align-items: center; color: var(--text); font-size: 14px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.hint { margin: -4px 0 12px; font-size: 13px; color: var(--muted); word-break: break-all; }
.error { color: var(--bad); font-size: 13px; margin: 0 0 10px; }
.dlg-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 6px; }

@media (max-width: 640px) {
  header, main { padding-left: 14px; padding-right: 14px; }
  th:nth-child(2), td:nth-child(2) { display: none; }
}