/* =====================================================================
   site.css — Khung site công khai: header, hero, category rows,
   post-card (thumbnail + tag), footer.
   Dùng CHUNG token màu/typography với article.css (đã nạp cùng layout).
   ===================================================================== */

/* ---------- HEADER ---------- */
.site-header{
  position:sticky;top:0;z-index:40;
  background:color-mix(in srgb, var(--surface) 86%, transparent);
  backdrop-filter:saturate(1.5) blur(12px);
}
.site-header-inner{
  position:relative;max-width:1180px;margin:0 auto;padding:12px 24px;
  display:flex;align-items:center;gap:26px;
  border-bottom: 1px solid #e9ecef;
}
.site-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.02em;color:var(--acc);text-decoration:none;white-space:nowrap;}
.site-brand .dot{width:11px;height:11px;border-radius:50%;background:var(--acc);box-shadow:0 0 0 4px color-mix(in srgb,var(--acc) 16%,transparent);}

/* wrapper cho nav + actions — desktop: trong suốt; mobile: dropdown */
.site-collapse{display:contents;}

.site-nav{display:flex;align-items:center;gap:3px;}
.site-nav a{
  position:relative;font-size:14px;font-weight:500;color:var(--ink-2);text-decoration:none;
  padding:8px 13px;border-radius:9px;white-space:nowrap;transition:color .12s,background .12s;
  display:inline-flex;align-items:center;
}
.site-nav a:hover{color:var(--ink);background:var(--surface-2);}
.site-nav a.active{color:var(--acc);background:color-mix(in srgb,var(--acc) 9%,transparent);font-weight:600;}
.site-nav a .dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--c,var(--acc));margin-right:7px;}

.site-actions{margin-left:auto;display:flex;align-items:center;gap:10px;white-space:nowrap;}
.site-user-box{display:flex;align-items:center;gap:9px;padding:3px 8px 3px 3px;}
.site-ava{width:32px;height:32px;flex:0 0 auto;border-radius:50%;color:#fff;font-weight:700;font-size:14px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--acc),color-mix(in srgb,var(--acc) 55%,#0b3a8f));}
.site-uname{font-size:14px;font-weight:600;color:var(--ink);max-width:160px;overflow:hidden;text-overflow:ellipsis;}
.site-actions .lnk{font-size:14px;color:var(--ink-2);text-decoration:none;padding:8px 12px;border-radius:9px;transition:.12s;}
.site-actions .lnk:hover{color:var(--ink);background:var(--surface-2);}
.site-actions .btn-cta{
  font-size:14px;font-weight:600;color:#fff;background:var(--acc);
  padding:9px 16px;border-radius:10px;text-decoration:none;transition:filter .12s;
}
.site-actions .btn-cta:hover{filter:brightness(1.08);}
.site-search-btn{display:inline-flex;align-items:center;gap:8px;background:var(--surface);
  border:1px solid var(--line);border-radius:10px;padding:8px 10px 8px 12px;cursor:pointer;
  color:var(--ink-2);font-family:var(--sans);font-size:14px;transition:.12s;}
.site-search-btn:hover{color:var(--ink);background:var(--surface-2);}
.site-search-btn svg{width:17px;height:17px;flex:0 0 auto;}
.site-search-btn span{white-space:nowrap;}
.site-search-btn kbd{font-family:var(--mono);font-size:11px;color:var(--ink-3);background:var(--surface-2);
  border:1px solid var(--line);border-radius:5px;padding:1px 6px;line-height:1.5;}
.logout-form{display:inline;margin:0;}
.logout-btn{background:none;border:1px solid var(--line);cursor:pointer;font-family:var(--sans);font-size:14px;
  color:var(--ink-2);padding:8px 13px;border-radius:9px;transition:.12s;}
.logout-btn:hover{color:var(--ink);border-color:var(--ink-3);background:var(--surface-2);}

/* nút đổi Sáng/Tối */
.theme-toggle{width:40px;height:40px;flex:0 0 auto;border:1px solid var(--line);border-radius:10px;background:var(--surface);
  color:var(--ink-2);display:inline-flex;align-items:center;justify-content:center;gap:9px;cursor:pointer;transition:.12s;padding:0;}
.theme-toggle:hover{color:var(--ink);background:var(--surface-2);}
.theme-toggle svg{width:19px;height:19px;flex:0 0 auto;}
.theme-toggle .i-sun{display:none;}
.theme-toggle .tt-text{display:none;font-size:15px;font-weight:500;}
:root[data-theme="dark"] .theme-toggle .i-moon{display:none;}
:root[data-theme="dark"] .theme-toggle .i-sun{display:inline;}

/* hamburger */
.site-burger{display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);border-radius:11px;
  background:var(--surface);flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;transition:background .12s;}
.site-burger:hover{background:var(--surface-2);}
.site-burger span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform .22s ease, opacity .18s ease;}
.site-header.open .site-burger span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.site-header.open .site-burger span:nth-child(2){opacity:0;}
.site-header.open .site-burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- RESPONSIVE HEADER (mobile) ---------- */
@media (max-width:900px){
  .site-header-inner{gap:14px;}
  .site-burger{display:flex;}
  .site-collapse{
    position:absolute;top:calc(100% + 1px);left:0;right:0;z-index:30;
    display:flex;flex-direction:column;gap:0;
    background:var(--surface);border-bottom:1px solid var(--line);
    box-shadow:0 24px 44px -26px rgba(17,24,39,.30);
    padding:10px 16px 16px;
    opacity:0;visibility:hidden;transform:translateY(-10px);pointer-events:none;
    transition:opacity .2s ease, transform .2s ease, visibility .2s;
  }
  .site-header.open .site-collapse{opacity:1;visibility:visible;transform:none;pointer-events:auto;}
  .site-nav{flex-direction:column;align-items:stretch;gap:2px;}
  .site-nav a{padding:12px;border-radius:10px;font-size:15px;}
  .site-actions{margin-left:0;flex-direction:column;align-items:stretch;gap:9px;
    margin-top:10px;padding-top:12px;border-top:1px solid var(--line);}
  .site-user-box{padding:2px;margin-bottom:2px;}
  .site-uname{max-width:none;}
  .site-actions .lnk,.site-actions .btn-cta{text-align:center;padding:12px;border-radius:10px;}
  .logout-form{display:block;width:100%;}
  .logout-btn{width:100%;padding:12px;}
  .theme-toggle{width:100%;height:auto;justify-content:flex-start;padding:12px;}
  .theme-toggle .tt-text{display:inline;}
  .site-search-btn{width:100%;justify-content:flex-start;padding:12px;order:-1;}
}

/* ---------- Ô TÌM KIẾM THÔNG MINH (overlay dạng command palette) ---------- */
.qs-overlay{position:fixed;inset:0;z-index:80;display:flex;justify-content:center;
  padding:12vh 20px 20px;background:rgba(15,18,24,.5);backdrop-filter:blur(3px);
  opacity:0;visibility:hidden;transition:opacity .18s ease,visibility .18s;}
.qs-overlay.open{opacity:1;visibility:visible;}
.qs-panel{position:relative;width:100%;max-width:580px;max-height:70vh;display:flex;flex-direction:column;
  background:var(--sheet);border:1px solid var(--line);border-radius:16px;overflow:hidden;
  box-shadow:0 30px 70px -20px rgba(0,0,0,.45);transform:translateY(-10px);transition:transform .18s ease;}
.qs-overlay.open .qs-panel{transform:none;}
.qs-form{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--line);flex:0 0 auto;}
.qs-icon{width:19px;height:19px;flex:0 0 auto;color:var(--ink-3);}
.qs-input{flex:1;min-width:0;border:none;background:none;color:var(--ink);font-family:var(--sans);font-size:16px;}
.qs-input:focus{outline:none;}
.qs-input::-webkit-search-cancel-button{display:none;}
.qs-close{flex:0 0 auto;width:30px;height:30px;border:none;border-radius:9px;background:var(--surface-2);
  color:var(--ink-2);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.12s;}
.qs-close:hover{color:var(--ink);background:var(--surface);}
.qs-close svg{width:14px;height:14px;}
.qs-results{overflow-y:auto;padding:10px;}
.qs-hint{margin:0;padding:22px 10px;text-align:center;color:var(--ink-3);font-size:13.5px;}
.qs-loading{display:flex;gap:5px;justify-content:center;padding:24px 10px;}
.qs-loading span{width:7px;height:7px;border-radius:50%;background:var(--acc);animation:qs-bounce 1s infinite;}
.qs-loading span:nth-child(2){animation-delay:.15s;}
.qs-loading span:nth-child(3){animation-delay:.3s;}
@keyframes qs-bounce{0%,60%,100%{transform:translateY(0);opacity:.4;}30%{transform:translateY(-5px);opacity:1;}}
.qs-list{display:flex;flex-direction:column;gap:3px;}
.qs-item{display:flex;flex-direction:column;gap:2px;padding:10px 12px;border-radius:10px;
  text-decoration:none;transition:background .12s;}
.qs-item:hover{background:var(--surface-2);}
.qs-cat{font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--acc);font-weight:600;}
.qs-title{font-size:14.5px;font-weight:700;color:var(--ink);}
.qs-ex{font-size:12.5px;color:var(--ink-3);}
.qs-more{display:block;margin-top:4px;padding:12px;text-align:center;border-top:1px solid var(--line);
  color:var(--acc);font-weight:600;font-size:13.5px;text-decoration:none;}
.qs-more:hover{background:var(--surface-2);}
@media (max-width:560px){
  .qs-overlay{padding:8vh 14px 14px;}
  .qs-panel{max-height:78vh;}
}

/* ---------- WIDE CONTAINER cho trang chủ / category ---------- */
.site-main{max-width:1180px;margin:0 auto;padding:0 24px 90px;}

/* ---------- HERO trang chủ ---------- */
.home-hero{
  position:relative;overflow:hidden;
  margin:28px 0 8px;padding:54px 40px;border-radius:20px;
  background:
    radial-gradient(1200px 400px at 100% -20%, color-mix(in srgb,var(--acc) 20%,transparent), transparent 60%),
    linear-gradient(180deg, var(--surface), var(--surface-2));
  border:1px solid var(--line);
}
.home-hero .eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-3);margin:0 0 14px;}
.home-hero h1{font-size:clamp(30px,5vw,50px);line-height:1.05;font-weight:800;letter-spacing:-.02em;margin:0 0 14px;max-width:16ch;}
.home-hero h1 .grad{
  background:linear-gradient(90deg,var(--acc),color-mix(in srgb,var(--acc) 45%,#38bdf8));
  -webkit-background-clip:text;background-clip:text;
  color:var(--acc);-webkit-text-fill-color:transparent; /* fallback nếu trình duyệt không hỗ trợ clip */
}
.home-hero p{font-size:clamp(15px,2vw,18px);color:var(--ink-2);max-width:60ch;margin:0 0 22px;}
.hero-quick{display:flex;flex-wrap:wrap;gap:8px;}
.hero-quick a{
  font-family:var(--mono);font-size:12.5px;text-decoration:none;color:var(--ink);
  background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--c,var(--acc));
  padding:7px 12px;border-radius:8px;transition:transform .12s,background .12s;
}
.hero-quick a:hover{transform:translateY(-2px);background:var(--surface-2);}

/* ---------- HERO SLIDER (ảnh tự chạy) ---------- */
.hero-slider{position:relative;margin:28px 0 10px;}
.hs-viewport{position:relative;height:400px;border-radius:20px;overflow:hidden;
  border:1px solid rgba(17,24,39,.06);background:var(--surface-2);box-shadow:0 22px 50px -34px rgba(18,22,28,.5);}
.hs-track{display:flex;height:100%;will-change:transform;transition:transform .6s cubic-bezier(.4,0,.2,1);}
.hs-slide{position:relative;flex:0 0 100%;height:100%;display:block;text-decoration:none;color:#fff;overflow:hidden;}
.hs-bg{position:absolute;inset:0;background:linear-gradient(135deg, color-mix(in srgb,var(--acc) 42%,#0b0d11), #0b0d11);}
.hs-bg img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.hs-slide::after{content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(90deg, rgba(8,10,14,.86) 0%, rgba(8,10,14,.6) 42%, rgba(8,10,14,.12) 100%);}
.hs-content{position:relative;z-index:2;max-width:640px;height:100%;
  display:flex;flex-direction:column;justify-content:center;gap:15px;padding:0 58px;}
.hs-cat{align-self:flex-start;font-family:var(--mono);font-size:11px;font-weight:700;letter-spacing:.12em;
  text-transform:uppercase;background:var(--acc);color:#fff;padding:5px 12px;border-radius:20px;}
.hs-content h2{font-size:clamp(26px,4vw,42px);font-weight:800;line-height:1.08;letter-spacing:-.02em;margin:0;
  text-shadow:0 2px 24px rgba(0,0,0,.45);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.hs-content p{font-size:clamp(14px,1.6vw,17px);color:rgba(255,255,255,.92);margin:0;max-width:52ch;
  text-shadow:0 1px 14px rgba(0,0,0,.5);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.hs-cta{align-self:flex-start;margin-top:6px;font-weight:700;font-size:15px;color:#fff;
  background:rgba(255,255,255,.15);
  padding:10px 18px;border-radius:10px;transition:background .14s;}
.hs-slide:hover .hs-cta{background:rgba(255,255,255,.26);}
/* mũi tên — nhô ra rìa slider, nút tròn trắng nổi */
.hs-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:6;
  width:46px;height:46px;border-radius:50%;border:1px solid var(--line);
  background:var(--sheet);color:var(--ink);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 24px -8px rgba(17,24,39,.40);
  transition:transform .18s cubic-bezier(.34,1.56,.64,1), background .16s, color .16s, box-shadow .16s;}
.hs-arrow svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round;}
.hs-arrow:hover{background:var(--acc);color:#fff;transform:translateY(-50%) scale(1.09);
  box-shadow:0 14px 28px -8px color-mix(in srgb,var(--acc) 55%,transparent);}
.hs-arrow:active{transform:translateY(-50%) scale(.95);}
.hs-prev{left:-21px;}
.hs-next{right:-21px;}
/* chấm điều hướng */
.hs-dots{position:absolute;bottom:20px;left:58px;z-index:3;display:flex;gap:8px;}
.hs-dot{width:9px;height:9px;border-radius:50%;border:none;background:rgba(255,255,255,.5);
  cursor:pointer;padding:0;transition:background .2s,width .2s;}
.hs-dot.active{background:#fff;width:26px;border-radius:5px;}
@media (max-width:700px){
  /* Mobile: slider tràn FULL chiều ngang màn hình (phá lề của .site-main) */
  .hero-slider{width:100vw;margin-left:calc(50% - 50vw);margin-right:calc(50% - 50vw);}
  .hs-viewport{height:340px;border-radius:0;border-left:none;border-right:none;}
  .hs-content{padding:0 24px;gap:12px;}
  .hs-dots{left:24px;}
  .hs-arrow{display:none;}
}

/* ---------- SECTION HEADER (mỗi hàng category) ---------- */
.row-head{display:flex;align-items:center;gap:16px;margin:52px 0 22px;padding-bottom:15px;border-bottom:1px solid var(--line);}
.row-head .rh-titles{min-width:0;}
.row-head h2{display:flex;align-items:center;gap:11px;font-size:clamp(19px,2.6vw,24px);font-weight:800;letter-spacing:-.02em;margin:0;}
.row-head h2 .cat-dot{width:10px;height:10px;border-radius:50%;background:var(--c,var(--acc));flex:0 0 auto;
  box-shadow:0 0 0 4px color-mix(in srgb,var(--acc) 14%,transparent);}
.row-head p{margin:5px 0 0;color:var(--ink-3);font-size:13.5px;}
.row-head .see-all{
  margin-left:auto;white-space:nowrap;display:inline-flex;align-items:center;gap:7px;
  font-size:13px;font-weight:600;color:var(--ink-2);text-decoration:none;
  padding:8px 15px;border:1px solid var(--line);border-radius:10px;background:var(--surface);transition:.14s;
}
.row-head .see-all:hover{color:var(--acc);border-color:color-mix(in srgb,var(--acc) 45%,var(--line));background:color-mix(in srgb,var(--acc) 7%,var(--surface));transform:translateX(2px);}

/* ---------- GRID thẻ bài ---------- */
.card-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fill,minmax(258px,1fr));}

/* ---------- POST CARD ---------- */
.post-card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:16px;overflow:hidden;
  text-decoration:none;color:inherit;
  transition:transform .2s cubic-bezier(.22,.61,.36,1), box-shadow .2s ease, border-color .2s ease;
  box-shadow:0 1px 2px rgba(18,22,28,.04);
}
/* .post-card:hover,.post-card:focus-visible{
  transform:translateY(-6px);
  border-color:color-mix(in srgb,var(--acc) 45%,var(--line));
  box-shadow:0 2px 6px rgba(18,22,28,.06),
             0 18px 34px -14px rgba(18,22,28,.30),
             0 0 0 1px color-mix(in srgb,var(--acc) 18%,transparent);
} */
:root[data-theme="dark"] .post-card:hover,:root[data-theme="dark"] .post-card:focus-visible{
  box-shadow:0 2px 8px rgba(0,0,0,.5),
             0 22px 40px -16px rgba(0,0,0,.72),
             0 0 0 1px color-mix(in srgb,var(--acc) 30%,transparent);
}
@media (prefers-reduced-motion:reduce){
  .post-card{transition:box-shadow .2s ease, border-color .2s ease;}
  /* .post-card:hover,.post-card:focus-visible{transform:none;} */
}
.pc-thumb{position:relative;aspect-ratio:16/9;flex:0 0 auto;overflow:hidden;
  background:linear-gradient(140deg, color-mix(in srgb,var(--acc) 20%,var(--surface-2)), var(--surface-2));}
.pc-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;transition:transform .45s ease;}
.post-card:hover .pc-thumb img{transform:scale(1.05);}
.pc-thumb::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .18s;
  background:linear-gradient(180deg,transparent 55%,rgba(8,11,16,.30));}
.post-card:hover .pc-thumb::after{opacity:1;}
/* placeholder (nằm dưới ảnh; hiện khi bài không có ảnh) */
.pc-thumb-mark{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-weight:800;font-size:42px;color:color-mix(in srgb,var(--acc) 44%,var(--ink-3));opacity:.5;user-select:none;}
.pc-cat{position:absolute;left:11px;top:11px;z-index:2;display:inline-flex;align-items:center;
  font-family:var(--mono);font-size:10.5px;font-weight:700;letter-spacing:.03em;color:#fff;
  background:rgba(12,15,20,.5);padding:5px 10px;border-radius:20px;backdrop-filter:blur(6px);border:1px solid rgba(255,255,255,.14);}
.pc-body{display:flex;flex-direction:column;gap:9px;padding:15px 16px 16px;flex:1 1 auto;}
.pc-title{font-size:16.5px;font-weight:700;line-height:1.34;letter-spacing:-.01em;margin:0;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .12s;}
.post-card:hover .pc-title{color:var(--acc);}
.pc-ex{font-size:13px;color:var(--ink-3);line-height:1.55;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.pc-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:2px;}
.tagchip{font-family:var(--mono);font-size:10.5px;color:var(--ink-2);background:var(--surface-2);
  border:1px solid var(--line-soft);padding:3px 8px;border-radius:6px;text-decoration:none;
  transition:background .13s, color .13s, border-color .13s;}
.tagchip::before{content:"#";color:var(--ink-3);transition:color .13s;}
/* Tag có thể bấm để tìm kiếm (link ở bài viết, hoặc chip trong card) */
a.tagchip,.tagchip[data-href]{cursor:pointer;}
a.tagchip:hover,.tagchip[data-href]:hover{color:#fff;background:var(--acc);border-color:var(--acc);}
a.tagchip:hover::before,.tagchip[data-href]:hover::before{color:rgba(255,255,255,.75);}
a.tagchip:focus-visible,.tagchip[data-href]:focus-visible{outline:2px solid var(--acc);outline-offset:2px;}
.pc-meta{display:flex;align-items:center;gap:8px;margin-top:auto;padding-top:12px;
  font-family:var(--mono);font-size:11px;color:var(--ink-3);border-top:1px solid var(--line-soft);}
.pc-meta .sep{opacity:.5;}

/* ---------- FEATURED (bài nổi bật) ---------- */
.featured{
  display:grid;grid-template-columns:1.15fr 1fr;gap:0;margin:22px 0 6px;
  background:var(--surface);border:1px solid var(--line);border-radius:18px;overflow:hidden;
  text-decoration:none;color:inherit;transition:border-color .16s, box-shadow .16s;
}
.featured:hover{border-color:color-mix(in srgb,var(--acc) 40%,var(--line));box-shadow:0 22px 50px -34px rgba(18,22,28,.5);}
.featured .ft-thumb{position:relative;min-height:280px;
  background:linear-gradient(135deg, color-mix(in srgb,var(--acc) 34%,var(--surface)), color-mix(in srgb,var(--acc) 6%,var(--surface)));}
.featured .ft-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.featured .ft-thumb .pc-thumb-mark{font-size:96px;}
.featured .ft-body{padding:34px 34px;display:flex;flex-direction:column;gap:14px;justify-content:center;}
.featured .ft-badge{align-self:flex-start;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;font-weight:700;
  color:var(--acc);background:color-mix(in srgb,var(--acc) 12%,var(--surface));border:1px solid color-mix(in srgb,var(--acc) 30%,var(--line));padding:5px 11px;border-radius:20px;}
.featured h2{font-size:clamp(22px,3vw,30px);font-weight:800;line-height:1.18;letter-spacing:-.02em;margin:0;}
.featured p{color:var(--ink-2);margin:0;font-size:15px;line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.featured .ft-meta{display:flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;color:var(--ink-3);}
.featured .ft-cta{align-self:flex-start;margin-top:4px;font-weight:600;color:var(--acc);font-size:14px;}

/* ---------- SITE FOOTER ---------- */
.site-footer{position:relative;background: #fff;border-top: 1px solid #e9ecef;}
.site-footer-top{position:relative;z-index:1;max-width:1180px;margin:0 auto;padding:56px 24px 40px;
  display:grid;grid-template-columns:1.9fr 1fr 1fr 1.15fr;gap:44px;}

/* Brand */
.ft-brand .ft-logo{display:inline-flex;align-items:center;gap:12px;text-decoration:none;}
.ft-mark{width:42px;height:42px;border-radius:50%;flex:0 0 auto;object-fit:cover;}
.ft-logo-text{font-weight:800;font-size:21px;letter-spacing:-.02em;color:var(--acc);}
.ft-tag{color:var(--ink-3);font-size:14px;line-height:1.65;margin:17px 0 19px;max-width:42ch;}

/* Cột link */
.ft-col h4{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);margin:3px 0 16px;font-weight:600;}
.ft-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px;}
.ft-col ul a{color:var(--ink-2);text-decoration:none;font-size:14px;display:inline-flex;align-items:center;gap:10px;
  transition:color .14s,transform .14s;}
.ft-col ul a .d{width:6px;height:6px;border-radius:50%;background:var(--c,var(--acc));flex:0 0 auto;opacity:.65;transition:.14s;}
.ft-col ul a:hover{color:var(--acc);transform:translateX(3px);}
.ft-col ul a:hover .d{opacity:1;box-shadow:0 0 0 4px color-mix(in srgb,var(--acc) 16%,transparent);}

/* CTA */
.ft-cta-text{color:var(--ink-3);font-size:13.5px;line-height:1.6;margin:0 0 17px;}

/* Thanh dưới */
.ft-bottom{position:relative;z-index:1;border-top:1px solid var(--line);background:var(--surface);}
.ft-bottom-inner{max-width:1180px;margin:0 auto;padding:18px 24px;display:flex;align-items:center;gap:16px 26px;flex-wrap:wrap;}
.ft-copy{margin:0;font-family:var(--mono);font-size:12.5px;color:var(--ink-3);}
.ft-copy b{color:var(--ink-2);font-weight:700;}

@media (max-width:820px){
  .site-footer-top{grid-template-columns:1fr 1fr;gap:30px 22px;padding:40px 22px 30px;}
  .ft-brand{grid-column:1 / -1;}
  .ft-bottom-inner{flex-direction:column;align-items:flex-start;gap:14px;}
  .ft-controls{margin-left:0;}
}
@media (max-width:560px){
  /* Footer gọn cho điện thoại: link 2 cột, CTA trải ngang, thu nhỏ khoảng cách */
  .site-footer-top{grid-template-columns:1fr 1fr;gap:22px 18px;padding:30px 16px 22px;}
  .ft-brand{grid-column:1 / -1;}
  .ft-cta-col{grid-column:1 / -1;}
  .ft-logo-text{font-size:19px;}
  .ft-mark{width:36px;height:36px;border-radius:10px;}
  .ft-tag{font-size:13px;line-height:1.55;margin:12px 0 14px;max-width:none;}
  .ft-social a{width:36px;height:36px;border-radius:10px;}
  .ft-social svg{width:16px;height:16px;}
  .ft-col h4{margin:0 0 11px;}
  .ft-col ul{gap:9px;}
  .ft-col ul a{font-size:13.5px;}
  .ft-cta-text{margin-bottom:12px;}
  .ft-bottom-inner{padding:15px 16px;gap:12px;}
  .ft-copy{font-size:12px;}
  .ft-controls{gap:10px 16px;width:100%;}
  .ft-ctl{gap:8px;}
  .seg a,.seg button{padding:6px 11px;font-size:12.5px;}
}

/* ---------- EMPTY ---------- */
.empty-note{margin:40px 0;padding:34px;border:1px dashed var(--line);border-radius:14px;text-align:center;color:var(--ink-3);background:var(--surface);}

/* ---------- RESPONSIVE ---------- */
@media (max-width:820px){
  .featured{grid-template-columns:1fr;}
  .featured .ft-thumb{min-height:210px;}
  .home-hero{padding:40px 24px;}
}
@media (max-width:560px){
  .site-actions .lnk{display:none;}
  .card-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));}
}

/* ---------- FOOTER: icon mạng xã hội + hàng tiện ích (ngôn ngữ/giao diện) ---------- */
.ft-icons{display:flex;flex-wrap:wrap;gap:9px;align-items:center;margin-top:2px;}
.ft-utility{display:flex;flex-wrap:wrap;gap:9px;align-items:center;margin-top:10px;}
.ft-icon{width:40px;height:40px;flex:0 0 auto;border-radius:12px;border:1px solid var(--line);background:var(--surface-2);
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink-2);cursor:pointer;text-decoration:none;padding:0;
  transition:transform .16s,background .16s,color .16s,border-color .16s,box-shadow .16s;}
.ft-icon:hover{color:#fff;background:var(--acc);border-color:var(--acc);transform:translateY(-3px);
  box-shadow:0 12px 24px -12px color-mix(in srgb,var(--acc) 85%,transparent);}
.ft-icon svg{width:18px;height:18px;fill:currentColor;}
.ft-icon.ft-flag{font-size:20px;line-height:1;}
.ft-icon.ft-flag:hover{background:var(--surface);color:var(--ink);border-color:var(--acc);}
.ft-icon .flag-emoji{display:block;}
.ft-icon .t-sun{display:none;}
:root[data-theme="dark"] .ft-icon .t-moon{display:none;}
:root[data-theme="dark"] .ft-icon .t-sun{display:block;}
@media (max-width:560px){ .ft-icons,.ft-utility{gap:8px;} .ft-icon{width:38px;height:38px;} }