/* ==========================================================================
   tradeline.vn — hệ thống giao diện
   1 URL responsive, không layout cố định, tối ưu LCP/CLS/INP.
   Sáng/tối tự theo hệ điều hành. Không dùng thư viện JS/CSS nào.
   ========================================================================== */

:root{
  --bg:#f4f6f9; --bg-2:#eaeef4;
  --card:#fff; --card-2:#f8fafc;
  --ink:#0f1720; --ink-2:#44566b; --muted:#6b7f94;
  --line:#dde4ec; --line-2:#eef2f7;
  --brand:#0f5fd8; --brand-ink:#fff; --brand-soft:#e8f0fe;
  --hot:#d81b45; --hot-soft:#fdeaef;
  --ok:#0e8a5f;
  --chip:#eef3f9;
  --shadow:0 1px 2px rgba(16,32,56,.06), 0 8px 24px -12px rgba(16,32,56,.18);
  --radius:12px; --radius-sm:9px; --wrap:1140px;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0b1016; --bg-2:#0f151d;
    --card:#141b25; --card-2:#111823;
    --ink:#e9eff6; --ink-2:#a9bccf; --muted:#8098b0;
    --line:#24303d; --line-2:#1b2530;
    --brand:#5aa6ff; --brand-ink:#08121f; --brand-soft:#15243a;
    --hot:#ff6b87; --hot-soft:#2a1620;
    --ok:#4ad3a0;
    --chip:#1a2431;
    --shadow:0 1px 2px rgba(0,0,0,.4), 0 10px 30px -14px rgba(0,0,0,.7);
  }
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}

body{
  margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-feature-settings:"tnum" 0;
  -webkit-font-smoothing:antialiased;
}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 16px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
img,svg{max-width:100%;height:auto}

.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}
.skip{position:absolute;left:-9999px;top:0;z-index:99;background:var(--brand);color:var(--brand-ink);padding:10px 16px;border-radius:0 0 8px 0}
.skip:focus{left:0}

/* ---------- Header ---------- */
.site-head{
  background:color-mix(in srgb, var(--card) 88%, transparent);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:30;
}
.head-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{flex:0 0 auto;border-radius:9px;display:block}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:19px;letter-spacing:-.2px}
.brand-text small{font-size:11.5px;color:var(--muted);font-weight:500}

.nav-toggle{
  margin-left:auto;display:inline-flex;align-items:center;gap:8px;
  background:var(--chip);color:var(--ink);border:1px solid var(--line);
  border-radius:9px;padding:8px 13px;font:inherit;font-size:14px;font-weight:600;cursor:pointer;
}
.nav-toggle .bars{width:15px;height:10px;border-top:2px solid currentColor;border-bottom:2px solid currentColor;position:relative}
.nav-toggle .bars::after{content:"";position:absolute;left:0;top:3px;width:15px;border-top:2px solid currentColor}

.mainnav{flex-basis:100%;display:none}
.mainnav.open{display:block}
.mainnav ul{list-style:none;margin:0 0 10px;padding:0;display:flex;flex-direction:column;gap:2px}
.mainnav a{display:block;padding:10px 12px;border-radius:9px;color:var(--ink-2);font-size:15px;font-weight:500}
.mainnav a:hover{background:var(--chip);color:var(--ink);text-decoration:none}
.mainnav a[aria-current="page"]{background:var(--brand-soft);color:var(--brand);font-weight:700}
@media(min-width:900px){
  .nav-toggle{display:none}
  .mainnav{display:block;flex-basis:auto;margin-left:auto}
  .mainnav ul{flex-direction:row;gap:2px;margin:0}
  .mainnav a{padding:8px 12px}
}

/* ---------- Breadcrumb / H1 / timestamp ---------- */
.crumbs{margin:16px 0 8px;font-size:13px;color:var(--muted)}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"›";margin-right:6px;color:var(--line)}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand)}

h1{font-size:clamp(22px,4.2vw,31px);line-height:1.22;margin:4px 0 8px;letter-spacing:-.4px}
h2{font-size:clamp(17px,2.6vw,21px);line-height:1.3;margin:0 0 10px;letter-spacing:-.2px}
h3{font-size:16px;margin:18px 0 6px}

.updated{display:flex;align-items:center;gap:7px;margin:0 0 16px;font-size:13px;color:var(--muted)}
.updated .dot{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 3px color-mix(in srgb,var(--ok) 22%,transparent)}

/* ---------- Answer-first ---------- */
.answer-first{
  background:var(--card);border:1px solid var(--line);
  border-left:4px solid var(--brand);border-radius:var(--radius);
  padding:15px 17px;margin:0 0 20px;font-size:16.5px;line-height:1.7;
  box-shadow:var(--shadow);
}
.hl{color:var(--hot)}

/* ---------- Card ---------- */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;margin:0 0 20px;box-shadow:var(--shadow);
}
.card.note{background:var(--card-2);box-shadow:none}
.card>p{margin:0 0 10px}
.card>p:last-child{margin-bottom:0}
.lead{color:var(--ink-2)}
.more{margin-top:14px;font-size:15px;font-weight:600}
.two-col{display:grid;gap:24px}
@media(min-width:780px){.two-col{grid-template-columns:1fr 1fr}}

/* ---------- Bảng kết quả ---------- */
.kq-wrap{display:grid;gap:16px}
@media(min-width:840px){.kq-wrap{grid-template-columns:minmax(0,1.85fr) minmax(0,1fr)}}

table{border-collapse:collapse;width:100%}
caption{text-align:left;font-weight:700;padding:0 0 7px;font-size:13px;color:var(--muted);
  text-transform:uppercase;letter-spacing:.6px}

.kq{border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}
.kq th,.kq td{border-bottom:1px solid var(--line-2);padding:8px 10px;vertical-align:middle}
.kq tr:last-child th,.kq tr:last-child td{border-bottom:0}
.kq th{width:66px;background:var(--card-2);font-size:12.5px;color:var(--muted);
  text-align:left;font-weight:700;text-transform:uppercase;letter-spacing:.4px}
.kq td{display:flex;flex-wrap:wrap;gap:6px 12px}

.num{
  font-variant-numeric:tabular-nums;letter-spacing:.6px;font-weight:700;
  font-size:clamp(15px,3.4vw,19px);cursor:default;border-radius:5px;padding:1px 3px;
  transition:background-color .12s, color .12s;
}
.num.is-match{background:var(--hot);color:#fff}
.row-db{background:linear-gradient(90deg, var(--hot-soft), transparent)}
.row-db .num{color:var(--hot);font-size:clamp(24px,6.4vw,34px);letter-spacing:1px}
.row-db .num.is-match{color:#fff}

.dd{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.mini{border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}
.mini th,.mini td{border-bottom:1px solid var(--line-2);padding:6px 8px;font-size:14px}
.mini tr:last-child th,.mini tr:last-child td{border-bottom:0}
.mini th{width:34px;background:var(--card-2);text-align:center;color:var(--muted);font-weight:700}
.mini td{font-variant-numeric:tabular-nums;color:var(--ink-2)}
.mini td.is-match{background:var(--hot-soft);color:var(--hot);font-weight:700}

/* ---------- Bảng dữ liệu ---------- */
.grid{border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}
.grid th,.grid td{border-bottom:1px solid var(--line-2);padding:9px 11px;font-size:14.5px;text-align:left}
.grid tr:last-child th,.grid tr:last-child td{border-bottom:0}
.grid thead th{background:var(--card-2);font-size:12.5px;color:var(--muted);
  font-weight:700;text-transform:uppercase;letter-spacing:.4px;white-space:nowrap}
.grid tbody th{background:transparent;font-weight:700;white-space:nowrap}
.grid tbody tr:nth-child(even){background:color-mix(in srgb,var(--card-2) 60%,transparent)}
.grid tbody tr:hover{background:var(--brand-soft)}
.grid td{font-variant-numeric:tabular-nums;color:var(--ink-2)}
.num-cell{font-weight:700;letter-spacing:.6px;color:var(--ink)}
.wide{display:block;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}
@media(min-width:780px){.wide{display:table;white-space:normal}}

/* ---------- Chips số ---------- */
.chips{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.chips li>*{
  display:flex;flex-direction:column;align-items:center;gap:1px;min-width:64px;
  padding:8px 10px;background:var(--chip);border:1px solid var(--line);
  border-radius:10px;color:var(--ink);transition:transform .12s, border-color .12s;
}
.chips a:hover{border-color:var(--brand);transform:translateY(-1px);text-decoration:none}
.chips b{font-size:19px;font-variant-numeric:tabular-nums;letter-spacing:.8px;line-height:1.2}
.chips i{font-style:normal;font-size:11.5px;color:var(--muted);white-space:nowrap}
.chips.big b{font-size:22px}

/* thang nhiệt theo mức gan — đọc bảng bằng mắt nhanh hơn nhiều */
.chips .h3{background:var(--hot);border-color:var(--hot);color:#fff}
.chips .h3 i{color:rgba(255,255,255,.85)}
.chips .h2{background:color-mix(in srgb,var(--hot) 26%,var(--chip));border-color:color-mix(in srgb,var(--hot) 45%,var(--line))}
.chips .h1{background:color-mix(in srgb,var(--hot) 11%,var(--chip))}

/* ---------- Pager ---------- */
.pager{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;
  margin:0 0 20px;font-size:14.5px;font-weight:600}
.pager a{background:var(--card);border:1px solid var(--line);border-radius:9px;padding:9px 13px}
.pager a:hover{border-color:var(--brand);text-decoration:none}

/* ---------- FAQ ---------- */
.faq{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;margin:0 0 20px;box-shadow:var(--shadow)}
.faq details{border-top:1px solid var(--line-2);padding:11px 0}
.faq details:first-of-type{border-top:0;padding-top:4px}
.faq summary{cursor:pointer;list-style:none;display:flex;align-items:flex-start;gap:10px}
.faq summary::-webkit-details-marker{display:none}
.faq summary h3{margin:0;font-size:15.5px;flex:1}
.faq summary::after{content:"+";color:var(--muted);font-weight:700;font-size:19px;line-height:1.2}
.faq details[open] summary::after{content:"−"}
.faq p{margin:9px 0 0;color:var(--ink-2)}

.linklist{margin:0;padding-left:20px}
.linklist li{margin:6px 0}

/* ---------- Footer ---------- */
.site-foot{background:var(--card);border-top:1px solid var(--line);margin-top:32px;
  padding:28px 0;font-size:14.5px}
.foot-grid{display:grid;gap:22px}
@media(min-width:740px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr}}
.foot-brand{display:flex;align-items:center;gap:9px;margin-bottom:9px;font-size:17px}
.site-foot h2{font-size:14px;margin:0 0 9px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted)}
.site-foot ul{list-style:none;margin:0;padding:0}
.site-foot li{margin:5px 0}
.site-foot p{margin:0 0 8px;color:var(--ink-2)}
.age{display:inline-block;margin-top:6px;padding:3px 9px;border:1px solid var(--line);
  border-radius:20px;font-size:12px;font-weight:700;color:var(--muted)}
.disclaimer{margin-top:22px;padding-top:15px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.copy{font-size:13px;margin-top:10px;color:var(--muted)}

/* ---------- In ấn ---------- */
@media print{
  .site-head,.site-foot,.pager,.nav-toggle,.crumbs,.more,.skip{display:none!important}
  body{background:#fff;color:#000;font-size:12pt}
  .card,.answer-first,.faq{box-shadow:none;border:1px solid #ccc;break-inside:avoid}
  .faq details{display:block}
  .faq details>*{display:block}
  a[href^="/"]::after{content:" (tradeline.vn" attr(href) ")";font-size:9pt;color:#555}
}

/* ---------- Khối liên kết nội bộ theo ngữ cảnh ---------- */
.related{margin-top:26px;background:var(--card);border:1px solid var(--line);
         border-radius:var(--radius);padding:var(--pad)}
.related h2{margin:0 0 12px;font-size:15px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted)}
.related ul{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.related li{border-top:1px solid var(--line-2);padding-top:12px}
.related li:first-child{border-top:0;padding-top:0}
.related a{font-weight:600;display:block}
.related span{display:block;margin-top:3px;font-size:13.5px;color:var(--ink-2)}
@media (min-width:760px){.related ul{grid-template-columns:1fr 1fr;gap:14px 26px}
  .related li:nth-child(2){border-top:0;padding-top:0}}

/* ---------- Trang chủ: khối dữ liệu 2 cột ---------- */
.home-top{display:grid;gap:16px;margin-bottom:16px}
.home-top>.home-main{display:grid;gap:16px;align-content:start;min-width:0}
@media(min-width:1060px){
  .home-top{grid-template-columns:minmax(0,1fr) 332px;align-items:start}
}
.home-side{display:grid;gap:14px;align-content:start;min-width:0}
.home-side .card{padding:14px}
.side-box h2{font-size:14px;margin:0 0 10px;text-transform:uppercase;
  letter-spacing:.5px;color:var(--muted)}
.side-rule{margin:9px 0 0;font-size:12.5px;color:var(--muted)}
.chips.tight{gap:6px}
.chips.tight li>*{min-width:56px;padding:5px 7px}
.chips.tight b{font-size:16.5px}
.chips.tight i{font-size:11px}

/* Hộp ngày dương + âm lịch, giờ hoàng đạo */
.side-date{padding:0!important;overflow:hidden}
.sd-head{display:flex;justify-content:space-between;align-items:center;
  background:var(--card-2);border-bottom:1px solid var(--line);padding:8px 13px;
  font-size:13px;font-weight:700;color:var(--muted)}
.sd-clock{font-variant-numeric:tabular-nums;letter-spacing:.5px}
.sd-big{margin:0;padding:12px 13px 8px;text-align:center;font-size:36px;font-weight:800;
  line-height:1;color:var(--brand);font-variant-numeric:tabular-nums;letter-spacing:1px}
.sd-big span{color:var(--muted);font-weight:400}
.sd-am{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line-2)}
.sd-amL{padding:10px 8px;text-align:center;border-right:1px solid var(--line-2)}
.sd-lbl{display:block;font-size:12.5px;color:var(--muted)}
.sd-num{display:block;font-size:30px;font-weight:800;line-height:1.15;color:var(--hot)}
.sd-amR{padding:10px 8px;display:flex;flex-direction:column;justify-content:center;
  gap:5px;text-align:center;font-size:13.5px;font-weight:600}
.sd-hd{margin:0;padding:9px 13px;border-top:1px solid var(--line-2);
  background:var(--card-2);font-size:12.5px;color:var(--ink-2);line-height:1.55}
.sd-hd b{color:var(--ink)}

/* Bảng kết quả gọn hơn để đủ dữ liệu trong màn hình đầu */
.kq-card .kq th,.kq-card .kq td{padding:6px 9px}
.kq-card .num{font-size:clamp(14px,3.2vw,17px)}
.kq-card .row-db .num{font-size:clamp(22px,5.6vw,30px)}
.kq-card .mini th,.kq-card .mini td{padding:5px 7px;font-size:13px}
@media(min-width:1060px){.kq-card .kq-wrap{grid-template-columns:minmax(0,1.55fr) minmax(0,1fr)}}