/* KếtNốiViệc — CSS viết tay, không cần build. Mobile-first, hỗ trợ chế độ tối, tương phản đạt WCAG AA. */
:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f0f3f5;
  --text: #17202a;
  --muted: #5b6673;
  --border: #dde3e8;
  --primary: #0f766e;
  --primary-strong: #0b5c56;
  --primary-soft: #e3f4f1;
  --accent: #b45309;
  --accent-soft: #fdf1e1;
  --danger: #b42318;
  --danger-soft: #fdecea;
  --success: #157f3b;
  --success-soft: #e5f6eb;
  --star: #e8a20c;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 4px 16px rgba(16, 24, 40, .06);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1418;
    --surface: #161d22;
    --surface-2: #1d262c;
    --text: #e6edf2;
    --muted: #9aa8b3;
    --border: #2a353d;
    --primary: #2dd4bf;
    --primary-strong: #5eead4;
    --primary-soft: #12302d;
    --accent: #f5a524;
    --accent-soft: #3a2a12;
    --danger: #f97066;
    --danger-soft: #3b1c1a;
    --success: #4ade80;
    --success-soft: #15301f;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.6; color: var(--text); background: var(--bg); }
img, svg { max-width: 100%; }
a { color: var(--primary); text-underline-offset: 2px; }
a:hover { color: var(--primary-strong); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); }
h2 { font-size: clamp(1.25rem, 3vw, 1.6rem); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 100; }
.skip-link:focus { left: 8px; }

.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }
main { padding: 24px 0 56px; min-height: 60vh; }

/* Header */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 20; }
.site-header .container { display: flex; align-items: center; gap: 12px; min-height: 62px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.15rem; color: var(--text); text-decoration: none; }
.brand-mark { width: 30px; height: 30px; }
.nav { display: flex; gap: 4px; flex-wrap: wrap; align-items: center; margin-left: auto; }
.nav a, .nav button.linklike { color: var(--text); text-decoration: none; padding: 7px 10px; border-radius: var(--radius-sm); font-size: .95rem; }
.nav a:hover, .nav a[aria-current="page"] { background: var(--surface-2); color: var(--text); }
.site-header .nav-toggle { display: none; margin-left: auto; }
.badge-count { display: inline-block; min-width: 20px; padding: 0 6px; border-radius: 99px; background: var(--danger); color: #fff; font-size: .75rem; text-align: center; font-weight: 700; }
@media (max-width: 860px) {
  .site-header .nav-toggle { display: inline-flex; }
  .nav { display: none; width: 100%; flex-direction: column; align-items: stretch; padding-bottom: 12px; }
  .nav.open { display: flex; }
  .nav .btn { justify-content: center; }
}

/* Buttons & forms */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 1px solid transparent; border-radius: var(--radius-sm); padding: 10px 16px; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; line-height: 1.2; background: var(--surface-2); color: var(--text); }
.btn:hover { filter: brightness(.97); }
.btn-primary { background: var(--primary); color: #fff; }
@media (prefers-color-scheme: dark) { .btn-primary { color: #06231f; } }
.btn-primary:hover { background: var(--primary-strong); color: #fff; }
.btn-outline { background: transparent; border-color: var(--border); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 6px 10px; font-size: .9rem; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .6; cursor: not-allowed; }
button.linklike { background: none; border: 0; font: inherit; cursor: pointer; color: var(--primary); padding: 0; }

label { display: block; font-weight: 600; margin-bottom: 4px; }
.field { margin-bottom: 16px; }
.hint { color: var(--muted); font-size: .88rem; font-weight: 400; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=tel], input[type=date], input[type=search], select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); font: inherit; color: var(--text); background: var(--surface);
}
textarea { min-height: 110px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--primary); outline: 2px solid var(--primary-soft); }
.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; }
.check input { margin-top: 5px; width: 18px; height: 18px; flex: none; }
.error { color: var(--danger); font-size: .9rem; margin-top: 4px; }
.row { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .row-2 { grid-template-columns: 1fr 1fr; } .row-3 { grid-template-columns: repeat(3, 1fr); } }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip-option { position: relative; }
.chip-option input { position: absolute; opacity: 0; }
.chip-option span { display: inline-block; padding: 7px 12px; border: 1px solid var(--border); border-radius: 99px; cursor: pointer; font-weight: 500; background: var(--surface); }
.chip-option input:checked + span { background: var(--primary-soft); border-color: var(--primary); color: var(--primary-strong); }
.chip-option input:focus-visible + span { outline: 3px solid var(--primary); }

/* Cards & layout */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.card + .card { margin-top: 16px; }
.card h2:first-child, .card h3:first-child { margin-top: 0; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.layout { display: grid; gap: 24px; grid-template-columns: 1fr; }
@media (min-width: 960px) { .layout { grid-template-columns: minmax(0, 1fr) 340px; } }
.stack > * + * { margin-top: 16px; }
.muted { color: var(--muted); }
.small { font-size: .88rem; }
.flex { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.between { justify-content: space-between; }
.mt-0 { margin-top: 0; }
.list-plain { list-style: none; padding: 0; margin: 0; }
.list-plain li + li { margin-top: 8px; }
.divider { border: 0; border-top: 1px solid var(--border); margin: 18px 0; }

.tag { display: inline-flex; align-items: center; gap: 4px; padding: 2px 10px; border-radius: 99px; font-size: .82rem; font-weight: 600; background: var(--surface-2); color: var(--muted); }
.tag-primary { background: var(--primary-soft); color: var(--primary-strong); }
.tag-accent { background: var(--accent-soft); color: var(--accent); }
.tag-danger { background: var(--danger-soft); color: var(--danger); }
.tag-success { background: var(--success-soft); color: var(--success); }

.alert { padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 16px; border: 1px solid; }
.alert-success { background: var(--success-soft); border-color: var(--success); }
.alert-error { background: var(--danger-soft); border-color: var(--danger); }
.alert-info { background: var(--primary-soft); border-color: var(--primary); }

/* Hero */
.hero { background: linear-gradient(135deg, var(--primary-soft), var(--surface) 70%); border-bottom: 1px solid var(--border); padding: 40px 0 32px; }
.hero p.lead { font-size: 1.1rem; color: var(--muted); max-width: 640px; }
.ai-box { background: var(--surface); border: 2px solid var(--primary); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); max-width: 760px; }
.ai-box textarea { min-height: 84px; border: 0; padding: 4px; outline: none; }
.ai-box textarea:focus { outline: none; }
.ai-examples { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.ai-examples button { border: 1px dashed var(--border); background: transparent; color: var(--muted); border-radius: 99px; padding: 4px 10px; font: inherit; font-size: .85rem; cursor: pointer; }
.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 24px; }
@media (min-width: 720px) { .stats { grid-template-columns: repeat(4, 1fr); } }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px 14px; }
.stat strong { display: block; font-size: 1.5rem; }
section.block { margin-top: 36px; }
section.block > h2 { margin-bottom: 14px; }

/* Category tiles */
.cat-grid { display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); }
.cat-tile { display: flex; gap: 10px; align-items: center; padding: 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); color: var(--text); text-decoration: none; }
.cat-tile:hover { border-color: var(--primary); color: var(--text); }
.cat-tile .icon { font-size: 1.5rem; }
.cat-tile small { display: block; color: var(--muted); }

/* Job & worker cards */
.job-card, .worker-card { display: flex; flex-direction: column; gap: 6px; }
.job-card h3 a, .worker-card h3 a { color: var(--text); text-decoration: none; }
.job-card h3 a:hover, .worker-card h3 a:hover { color: var(--primary); }
.meta { display: flex; flex-wrap: wrap; gap: 6px 14px; color: var(--muted); font-size: .9rem; }
.pay { font-weight: 700; color: var(--accent); }
.avatar { width: 48px; height: 48px; border-radius: 50%; display: inline-grid; place-items: center; font-weight: 700; background: var(--primary-soft); color: var(--primary-strong); flex: none; }
.avatar-lg { width: 72px; height: 72px; font-size: 1.5rem; }

.stars { color: var(--star); letter-spacing: 1px; white-space: nowrap; }
.stars .off { color: var(--border); }
.score-ring { display: inline-grid; place-items: center; width: 50px; height: 50px; border-radius: 50%; font-weight: 800; background: conic-gradient(var(--primary) calc(var(--v) * 1%), var(--surface-2) 0); flex: none; }
.score-ring span { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; background: var(--surface); font-size: .9rem; }
.reasons { list-style: none; padding: 0; margin: 6px 0 0; display: flex; flex-wrap: wrap; gap: 6px; }
.reasons li { font-size: .82rem; background: var(--surface-2); padding: 2px 8px; border-radius: 99px; }
.reasons li::before { content: "✓ "; color: var(--success); font-weight: 700; }

.bar { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--primary); border-radius: 99px; }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: .82rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); }

/* Breadcrumbs */
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 4px; padding: 0; margin: 0 0 14px; font-size: .88rem; color: var(--muted); }
.breadcrumbs li + li::before { content: "›"; margin: 0 6px; }
.breadcrumbs a { color: var(--muted); }

/* Rating input */
.rating-input { display: inline-flex; flex-direction: row-reverse; gap: 2px; }
.rating-input input { position: absolute; opacity: 0; }
.rating-input label { font-size: 1.7rem; color: var(--border); cursor: pointer; margin: 0; line-height: 1; }
.rating-input input:checked ~ label, .rating-input label:hover, .rating-input label:hover ~ label { color: var(--star); }
.rating-input input:focus-visible + label { outline: 3px solid var(--primary); }
.criteria-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; padding: 6px 0; border-bottom: 1px dashed var(--border); }

details.report { margin-top: 12px; }
details.report summary { cursor: pointer; color: var(--muted); font-size: .88rem; }

.pagination { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 20px; list-style: none; padding: 0; }
.pagination a, .pagination span { display: inline-block; padding: 6px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); text-decoration: none; background: var(--surface); }
.pagination .active span { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination .disabled span { color: var(--muted); }

.notice-item { display: block; padding: 12px; border-bottom: 1px solid var(--border); color: var(--text); text-decoration: none; }
.notice-item.unread { background: var(--primary-soft); }
.notice-item:hover { background: var(--surface-2); }

.answer-first { font-size: 1.08rem; border-left: 4px solid var(--primary); padding: 10px 14px; background: var(--surface); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }

.site-footer { border-top: 1px solid var(--border); background: var(--surface); padding: 32px 0; font-size: .92rem; color: var(--muted); }
.site-footer .cols { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.site-footer h2 { font-size: 1rem; color: var(--text); }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li + li { margin-top: 6px; }
.site-footer a { color: var(--muted); }

@media (prefers-reduced-motion: no-preference) {
  .btn, .cat-tile, .card { transition: border-color .15s, background-color .15s, filter .15s; }
}
@media print { .site-header, .site-footer, .btn, form { display: none !important; } }

/* Tiện ích (thay cho style nội tuyến — CSP chặn style="") */
.ml-auto { margin-left: auto; }
.m-0 { margin: 0; }
.mt-8 { margin-top: 8px; }
.mt-20 { margin-top: 20px; }
.mb-0 { margin-bottom: 0; }
.score-svg { flex: none; }
.score-svg .track { stroke: var(--surface-2); }
.score-svg .value { stroke: var(--primary); }
.score-svg text { fill: var(--text); font-weight: 800; font-size: 13px; font-family: var(--font); }
meter { width: 100%; height: 10px; }

fieldset { border: 0; padding: 0; margin: 0 0 16px; min-width: 0; }
legend { padding: 0; }
details.card > summary { cursor: pointer; }

/* Địa bàn & khoảng cách */
.gps-box { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: -4px 0 16px; }
.distance { display: inline-flex; align-items: center; gap: 4px; font-weight: 600; color: var(--primary-strong); font-size: .9rem; }
.near-bar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 12px; }

/* Demo banner */
.demo-banner{background:#fff7ed;border-bottom:2px solid #f97316;padding:.5rem 1rem;font-size:.85rem;color:#9a3412;text-align:center}
.demo-banner a,.demo-banner-link{color:#9a3412;font-weight:600;text-decoration:underline}