:root {
  --bg: #f6f5f2; --card: #ffffff; --ink: #1d1c1a; --muted: #6b6862; --line: #e3e0da;
  --accent: #2f5d50; --accent-ink: #ffffff; --accent-soft: #e4eeea;
  --err: #b3261e; --err-soft: #fbe9e7; --warn: #8a5a00; --warn-soft: #fff3d6; --info: #35618f; --info-soft: #e7f0fa;
  --ok: #2e7d4f;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171716; --card: #222120; --ink: #ecebe8; --muted: #a29f98; --line: #3a3835;
    --accent: #7fbfa9; --accent-ink: #10201b; --accent-soft: #23342e;
    --err: #f2867d; --err-soft: #3a2220; --warn: #e8bd62; --warn-soft: #362c17; --info: #8fb8e6; --info-soft: #1e2a38; --ok: #7fcf9c;
  }
}
* { box-sizing: border-box; }
body { margin: 0; padding: 12px; background: var(--bg); color: var(--ink); font: 13px/1.45 system-ui, "Segoe UI", sans-serif; }
header h1 { margin: 0; font-size: 17px; letter-spacing: -.01em; }
.sub { margin: 2px 0 12px; color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px; margin-bottom: 12px; }
h2 { font-size: 14px; margin: 0 0 10px; display: flex; align-items: center; gap: 8px; }
h3 { font-size: 13px; margin: 14px 0 6px; }
.num { display: inline-grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-size: 12px; }
button { font: inherit; border: 1px solid var(--line); background: var(--card); color: var(--ink); border-radius: 7px; padding: 6px 10px; cursor: pointer; }
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: .5; cursor: not-allowed; }
button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); width: 100%; padding: 8px; font-weight: 600; margin: 4px 0; }
button.small { padding: 3px 8px; font-size: 12px; }
button.ghost { background: transparent; }
.row { display: flex; gap: 6px; align-items: center; margin-bottom: 8px; }
.row select { flex: 1; }
select, input[type=text], input[type=number], input[type=url], textarea {
  font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 5px 7px; width: 100%;
}
textarea { resize: vertical; margin: 6px 0; }
.hint { color: var(--muted); font-size: 12px; margin: 4px 0 8px; }
.muted { color: var(--muted); font-weight: normal; }
details { margin: 8px 0; }
summary { cursor: pointer; font-weight: 600; padding: 2px 0; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 8px 0; }
.grid label { display: flex; flex-direction: column; gap: 3px; font-size: 12px; color: var(--muted); min-width: 0; }
select, input { min-width: 0; }
body { overflow-x: hidden; }
.grid label.full { grid-column: 1 / -1; }
label.check { flex-direction: row !important; align-items: center; gap: 6px; color: var(--ink) !important; font-size: 12px; margin: 6px 0; display: flex; }
/* ---- extension (side panel) vs bản web ---- */
body:not(.web) .webonly { display: none; }
body.web .extonly { display: none; }
.urlrow { margin: 6px 0; }
.urlrow input { flex: 1; }
body.web { max-width: 1180px; margin: 0 auto; padding: 24px 16px 40px; font-size: 14px; }
body.web header { margin-bottom: 16px; }
body.web header h1 { font-size: 26px; }
body.web .intro { max-width: 760px; color: var(--muted); margin: 6px 0 0; }
@media (min-width: 920px) {
  body.web .layout { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 16px; align-items: start; }
  body.web .col2 { position: sticky; top: 16px; max-height: calc(100vh - 32px); overflow-y: auto; }
}
.filebtn { display: block; text-align: center; border: 1px solid var(--line); border-radius: 7px; padding: 7px; margin: 6px 0; cursor: pointer; font-size: 12px; }
.filebtn:hover { border-color: var(--accent); background: var(--accent-soft); }
.grid .full { grid-column: 1 / -1; min-width: 0; }
.margins { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; }
.margins > span { grid-column: 1 / -1; font-size: 12px; color: var(--muted); }
.ellist { display: flex; flex-direction: column; gap: 4px; }
.elrow { border: 1px solid var(--line); border-radius: 7px; background: var(--bg); min-width: 0; }
.elrow.open { border-color: var(--accent); }
.elhead { width: 100%; text-align: left; border: 0; background: transparent; padding: 6px 8px; display: flex; flex-direction: column; gap: 1px; border-radius: 7px; }
.elhead b { font-size: 12px; }
.elhead span { font-size: 11px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.elbody { padding: 0 8px 8px; margin: 0; }
[hidden] { display: none !important; }
.status { margin-top: 8px; padding: 8px; border-radius: 7px; background: var(--accent-soft); font-size: 12px; }
.status.error { background: var(--err-soft); color: var(--err); }
.drop { display: block; border: 1.5px dashed var(--line); border-radius: 9px; padding: 18px 10px; text-align: center; cursor: pointer; color: var(--muted); margin-bottom: 6px; }
.drop.over, .drop:hover { border-color: var(--accent); background: var(--accent-soft); }
.drop.has { color: var(--ink); border-style: solid; }
.tabs { display: flex; gap: 4px; margin-bottom: 8px; }
.tab { flex: 1; font-size: 12px; }
.tab[aria-selected=true] { border-color: var(--accent); background: var(--accent-soft); font-weight: 600; }
#otherReqs ul { margin: 4px 0 8px; padding-left: 18px; }
#otherReqs li { margin: 2px 0; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-bottom: 8px; }
.stat { background: var(--bg); border-radius: 7px; padding: 6px; text-align: center; }
.stat b { display: block; font-size: 16px; }
.stat span { font-size: 11px; color: var(--muted); }
ul.fixes, ul.flags { list-style: none; padding: 0; margin: 0; }
.fixes li { padding: 3px 0 3px 20px; position: relative; }
.fixes li::before { content: "✓"; position: absolute; left: 2px; color: var(--ok); font-weight: 700; }
.flags li { border-left: 3px solid var(--info); background: var(--info-soft); border-radius: 0 7px 7px 0; padding: 6px 8px; margin: 6px 0; }
.flags li.error { border-color: var(--err); background: var(--err-soft); }
.flags li.warn { border-color: var(--warn); background: var(--warn-soft); }
.flags .area { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); }
.flags .msg { white-space: pre-wrap; }
.flags .snip { font-size: 11px; color: var(--muted); font-style: italic; margin-top: 2px; }
.badge { background: var(--accent-soft); border-radius: 10px; padding: 0 7px; font-size: 11px; }
.filters { display: flex; flex-wrap: wrap; gap: 4px; }
.filters button { font-size: 11px; padding: 2px 8px; border-radius: 12px; }
.filters button[aria-pressed=true] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.settings { color: var(--muted); font-size: 12px; }
.settings label { display: flex; flex-direction: column; gap: 3px; margin: 6px 0; }