/* Hỏi đáp: search first, groups on the left, every question shows its short answer before it is opened */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.fq-hero h1{max-width:20ch}
.fq-search{margin-top:clamp(18px,3vw,28px);max-width:760px}
.fq-search-box{display:flex;align-items:center;gap:10px;padding:0 10px 0 18px;min-height:60px;border:1.5px solid var(--line);border-radius:18px;background:var(--surface);box-shadow:0 1px 2px rgba(20,20,30,.04),0 8px 24px -16px rgba(20,20,30,.25);transition:border-color .15s,box-shadow .15s;cursor:text}
.fq-search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.fq-search-box svg{flex:none;width:22px;height:22px;fill:none;stroke:var(--muted);stroke-width:2;stroke-linecap:round}
.fq-search-box input{flex:1;min-width:0;border:0;outline:0;background:transparent;font:500 1.125rem/1.5 var(--font-ui);color:var(--ink);padding:14px 0}
.fq-search-box input::placeholder{color:var(--faint)}
.fq-search-box input::-webkit-search-cancel-button{display:none}
.fq-clear{flex:none;border:0;border-radius:10px;padding:.45rem .8rem;background:var(--sunken);color:var(--ink-2);font:600 .875rem/1.4 var(--font-ui);cursor:pointer}
.fq-clear:hover{background:var(--line)}
.fq-status{min-height:1.5em;margin:.5rem 0 0 .25rem;font-size:.9rem;line-height:1.5;color:var(--muted)}

/* group filter: a list on wide screens, a row of chips on phones */
.fq-filters{position:sticky;top:calc(var(--head-h,64px) + 16px);display:flex;flex-direction:column;gap:4px}
.fq-filters p{margin:0 0 .5rem;padding-top:.35em;font:700 .75rem/1.5 var(--font-ui);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.fq-filter{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;padding:.6rem .8rem;border:1px solid transparent;border-radius:12px;background:transparent;color:var(--ink-2);text-align:left;cursor:pointer;font:500 .95rem/1.35 var(--font-ui)}
.fq-filter b{font-weight:500}
.fq-filter span{flex:none;min-width:1.8em;padding:.05rem .45rem;border-radius:99px;background:var(--sunken);color:var(--muted);font:600 .78rem/1.5 var(--font-ui);text-align:center}
.fq-filter:hover{background:var(--sunken);color:var(--ink)}
.fq-filter[aria-pressed=true]{background:var(--accent-soft);border-color:var(--accent-line);color:var(--accent-ink)}
.fq-filter[aria-pressed=true] b{font-weight:700}
.fq-filter[aria-pressed=true] span{background:var(--accent);color:#fff}

.fq-main{min-width:0;max-width:52rem;scroll-margin-top:calc(var(--head-h,64px) + 16px)}
.fq-main h2{margin:0 0 .8rem;font:600 clamp(1.4rem,2.4vw,1.75rem)/1.25 var(--font-display)}
.fq-main h2 small{display:block;margin-top:.2rem;font:400 .95rem/1.5 var(--font-ui);color:var(--muted)}

.fq-popular{margin-bottom:2.2rem}
.fq-pops{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:10px}
.fq-pop{display:flex;flex-direction:column;gap:.4rem;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:var(--surface);color:var(--ink);text-decoration:none;transition:border-color .15s,transform .15s}
.fq-pop:hover{border-color:var(--accent-line);transform:translateY(-1px)}
.fq-pop b{font:600 .98rem/1.4 var(--font-ui)}
.fq-pop span{font-size:.875rem;line-height:1.5;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

.fq-group{margin-bottom:2.2rem;scroll-margin-top:calc(var(--head-h,64px) + 16px)}
.fq-group .fq-item+.fq-item{margin-top:10px}
.fq-item{border:1px solid var(--line);border-radius:16px;background:var(--surface);scroll-margin-top:calc(var(--head-h,64px) + 16px);transition:border-color .15s}
.fq-item:hover{border-color:var(--accent-line)}
.fq-item[open]{border-color:var(--accent-line);box-shadow:0 10px 30px -22px rgba(20,20,30,.35)}
.fq-item summary{position:relative;display:flex;flex-direction:column;gap:.35rem;list-style:none;cursor:pointer;padding:16px 52px 16px 20px}
.fq-item summary::-webkit-details-marker{display:none}
.fq-item summary::after{content:"";position:absolute;right:22px;top:24px;width:9px;height:9px;border:solid var(--muted);border-width:0 2px 2px 0;transform:rotate(45deg);transition:transform .2s}
.fq-item[open] summary::after{transform:rotate(225deg);top:28px}
.fq-item summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:16px}
.fq-q{font:600 1.0625rem/1.45 var(--font-ui);color:var(--ink)}
.fq-v{font-size:.98rem;line-height:1.6;color:var(--ink-2)}
.fq-pill{display:inline-block;margin-right:.5rem;padding:.05rem .55rem;border-radius:99px;font:700 .75rem/1.6 var(--font-ui);vertical-align:.08em;white-space:nowrap}
.fq-pill.ok{background:var(--ok-soft);color:var(--ok)}
.fq-pill.no{background:var(--bad-soft);color:var(--bad)}
.fq-pill.tuy{background:var(--warn-soft);color:var(--warn)}
mark{background:#ffe9a8;color:inherit;border-radius:3px;padding:0 1px}

.fq-a{padding:0 20px 18px;border-top:1px dashed var(--line);margin:0 20px;padding-left:0;padding-right:0}
.fq-a>p:first-child{margin-top:1rem}
.fq-a p,.fq-a li{color:var(--ink-2);font-size:1rem;line-height:1.7}
.fq-a ul{padding-left:1.2rem;margin:.6rem 0}
.fq-a li{margin:.3rem 0}
.fq-a a{color:var(--accent-ink)}
.fq-a code{font-size:.92em;padding:.1em .35em;border-radius:6px;background:var(--sunken)}
.fq-sample{padding:14px 16px;border-radius:12px;background:var(--sunken);font:600 clamp(1.05rem,2vw,1.3rem)/1.7 var(--font-display);color:var(--ink) !important}
.fq-fig{margin:1rem 0}
.fq-fig img{display:block;width:100%;height:auto;border-radius:12px;border:1px solid var(--line)}
.fq-ctas{display:flex;flex-wrap:wrap;gap:8px;margin:1rem 0 0}
.fq-cta{display:inline-flex;align-items:center;min-height:40px;padding:.45rem 1rem;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink) !important;font:600 .92rem/1.35 var(--font-ui);text-decoration:none}
.fq-cta:hover{border-color:var(--accent-line)}
.fq-cta.lead{background:var(--accent);border-color:var(--accent);color:#fff !important}
.fq-cta.lead:hover{filter:brightness(1.06)}
.fq-rel{display:flex;flex-direction:column;gap:2px;margin:1.1rem 0 0;padding:12px 14px;border-radius:12px;background:var(--paper)}
.fq-rel b{margin-bottom:.25rem;font:700 .75rem/1.5 var(--font-ui);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.fq-rel a{padding:.2rem 0;font-size:.95rem;line-height:1.45;text-decoration:none}
.fq-rel a:hover{text-decoration:underline}
.fq-foot{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:1rem;font-size:.9rem;color:var(--muted)}
.fq-ask{margin-right:.2rem;line-height:1.5}
.fq-vote,.fq-copy{border:1px solid var(--line);border-radius:99px;padding:.3rem .85rem;background:var(--surface);color:var(--ink-2);font:600 .85rem/1.4 var(--font-ui);cursor:pointer}
.fq-vote:hover,.fq-copy:hover{border-color:var(--accent-line);color:var(--ink)}
.fq-copy{margin-left:auto}
.fq-foot.done .fq-vote{display:none}
.fq-tell{font-weight:600}

/* "Tôi định dùng font để…" */
.fq-picker{margin:1.1rem 0 0;padding:16px;border:1px solid var(--accent-line);border-radius:14px;background:linear-gradient(180deg,var(--accent-soft),var(--surface) 75%)}
.fq-picker-h{margin:0 0 .7rem !important;font:700 1rem/1.4 var(--font-ui);color:var(--ink) !important}
.fq-uses{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:8px}
.fq-uses button{padding:.6rem .8rem;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink);text-align:left;font:500 .92rem/1.4 var(--font-ui);cursor:pointer}
.fq-uses button:hover{border-color:var(--accent-line)}
.fq-uses button[aria-pressed=true]{border-color:var(--accent);background:var(--accent);color:#fff;font-weight:600}
.fq-result{margin-top:12px;padding:14px;border-radius:12px;background:var(--surface);border:1px solid var(--line)}
.fq-result-k{margin:0 !important;font:700 1.05rem/1.4 var(--font-ui);color:var(--ink) !important}
.fq-result[data-use=thuongmai] .fq-result-k{color:var(--warn) !important}
.fq-result[data-use=canhan] .fq-result-k{color:var(--ok) !important}
.fq-result-why{margin:.25rem 0 .8rem !important;font-size:.95rem !important}
.fq-result-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.fq-result-grid div{display:flex;flex-direction:column;gap:.3rem;padding:10px 12px;border-radius:10px;background:var(--paper)}
.fq-result-grid b{font:600 .85rem/1.4 var(--font-ui);color:var(--muted)}
.fq-result-grid span{font:600 .95rem/1.45 var(--font-ui);color:var(--ok)}
.fq-result-grid span.no{color:var(--bad)}
.fq-note{margin:.8rem 0 0 !important;font-size:.85rem !important;line-height:1.55 !important;color:var(--muted) !important}

.fq-empty,.fq-more{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:18px 20px;border:1px dashed var(--line);border-radius:16px;background:var(--paper)}
.fq-empty p,.fq-more p{margin:0;color:var(--ink-2);line-height:1.6}
.fq-empty{margin-bottom:1.5rem}
.fq-empty[hidden]{display:none}

@media (max-width:820px){
  .fq-filters{position:static;flex-direction:row;gap:6px;overflow-x:auto;padding-bottom:4px;scrollbar-width:none;margin:0 -16px;padding-left:16px;padding-right:16px}
  .fq-filters::-webkit-scrollbar{display:none}
  .fq-filters p{display:none}
  .fq-filter{flex:none;width:auto;border-color:var(--line);border-radius:99px;padding:.4rem .5rem .4rem .85rem;white-space:nowrap}
  .fq-search-box{min-height:54px;padding-left:14px}
  .fq-search-box input{font-size:1rem}
}
@media (max-width:560px){
  .fq-item summary{padding:14px 44px 14px 16px}
  .fq-item summary::after{right:18px}
  .fq-a{margin:0 16px}
  .fq-result-grid{grid-template-columns:1fr}
  .fq-pops{grid-template-columns:1fr}
  .fq-copy{margin-left:0}
}
@media (prefers-reduced-motion:reduce){.fq-pop,.fq-item summary::after{transition:none}.fq-pop:hover{transform:none}}