/* Guide hub (design/huong-dan(mới).html) — scoped .sg, /guide only */
.sg /* guide hero */
.ghero{position:relative;overflow:hidden;padding-block:clamp(40px,5vw,72px) clamp(44px,5.5vw,80px);background:var(--grad-navy);color:#fff;text-align:center}
.sg .ghero::before{content:"";position:absolute;right:-120px;top:-120px;width:360px;height:360px;border-radius:50%;background:radial-gradient(circle,rgba(255,176,32,.28),transparent 66%)}
.sg .ghero::after{content:"";position:absolute;left:-120px;bottom:-140px;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(243,112,6,.26),transparent 66%)}
.sg .ghero__in{position:relative;max-width:760px;margin-inline:auto}
.sg .ghero .eyebrow{background:rgba(255,255,255,.1);color:#FFCE7A;border-color:rgba(255,255,255,.16);box-shadow:none;margin-bottom:18px}
.sg .ghero h1{font-size:clamp(2.2rem,4.4vw,3.4rem);font-weight:900;letter-spacing:-.038em;color:#fff}
.sg .ghero p{color:#AFC0E2;font-size:clamp(1.02rem,1.4vw,1.2rem);margin-top:16px;max-width:600px;margin-inline:auto}
.sg .gsearch{position:relative;max-width:560px;margin:30px auto 0}
.sg .gsearch svg{position:absolute;left:20px;top:50%;transform:translateY(-50%);width:22px;height:22px;color:var(--slate2)}
.sg .gsearch input{width:100%;font-family:inherit;font-size:1.05rem;color:var(--ink);background:#fff;border:none;border-radius:var(--pill);padding:1.05em 1.4em 1.05em 3.4em;box-shadow:var(--sh-lift);outline:none}
.sg .gsearch input::placeholder{color:var(--slate2)}
.sg .gsearch input:focus{box-shadow:0 0 0 4px rgba(255,176,32,.45),var(--sh-lift)}
.sg .gchips{display:flex;flex-wrap:wrap;gap:9px;justify-content:center;margin-top:20px}
.sg .gchip{font-size:.86rem;font-weight:700;color:#E7EEFB;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);padding:8px 15px;border-radius:var(--pill);cursor:pointer;transition:all .15s}
.sg .gchip:hover{background:#fff;color:var(--flame-700);border-color:#fff}
.sg /* quick start steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:48px}
.sg .step{background:#fff;border:1px solid var(--line2);border-radius:var(--r-xl);padding:28px 24px;box-shadow:var(--sh);transition:transform .2s,box-shadow .2s}
.sg .step:hover{transform:translateY(-5px);box-shadow:var(--sh-lift)}
.sg .step .num{width:46px;height:46px;border-radius:14px;background:var(--flame-soft);color:var(--flame-700);display:grid;place-items:center;font-weight:900;font-size:1.15rem;margin-bottom:16px}
.sg .step:nth-child(2) .num{background:#E7EEFA;color:var(--navy)}
.sg .step:nth-child(3) .num{background:var(--gold-soft);color:#8a6d00}
.sg .step:nth-child(4) .num{background:#E6F6EE;color:#1E9E63}
.sg .step h3{font-size:1.05rem;font-weight:800;color:var(--navy);margin-bottom:6px}
.sg .step p{font-size:.9rem;color:var(--slate);line-height:1.5}
.sg /* guide grid */
.gcount{font-size:.86rem;color:var(--slate);font-weight:600;margin-top:26px;text-align:center;min-height:1.2em}
.sg .guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:22px}
.sg .gcard{background:#fff;border:1px solid var(--line2);border-radius:var(--r-xl);padding:26px;box-shadow:var(--sh);transition:transform .2s,box-shadow .2s,border-color .2s}
.sg .gcard:hover{transform:translateY(-5px);box-shadow:var(--sh-lift);border-color:transparent}
.sg .gcard__h{display:flex;align-items:center;gap:13px;margin-bottom:16px}
.sg .gcard__ic{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;flex:0 0 auto;background:var(--flame-soft)}
.sg .gcard:nth-child(3n+2) .gcard__ic{background:#E7EEFA}
.sg .gcard:nth-child(3n) .gcard__ic{background:var(--gold-soft)}
.sg .gcard__ic svg{width:25px;height:25px;color:var(--flame)}
.sg .gcard:nth-child(3n+2) .gcard__ic svg{color:var(--navy)}
.sg .gcard:nth-child(3n) .gcard__ic svg{color:#B8860B}
.sg .gcard__h h3{font-size:1.12rem;font-weight:800;color:var(--navy)}
.sg .gcard ul{list-style:none;display:flex;flex-direction:column;gap:2px}
.sg .gcard li a{display:flex;align-items:center;gap:9px;padding:8px 8px;border-radius:10px;font-size:.9rem;color:#3B466A;font-weight:500;transition:background .14s,color .14s}
.sg .gcard li a:hover{background:var(--flame-tint);color:var(--flame-700)}
.sg .gcard li a svg{width:15px;height:15px;color:var(--slate2);flex:0 0 auto;transition:transform .15s}
.sg .gcard li a:hover svg{color:var(--flame);transform:translateX(3px)}
.sg .no-results{display:none;text-align:center;padding:50px 20px;color:var(--slate)}
.sg .no-results svg{width:44px;height:44px;color:var(--slate2);margin:0 auto 14px}
.sg .no-results b{color:var(--navy);font-weight:800;display:block;font-size:1.1rem;margin-bottom:4px}
.sg /* videos */
.vid-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:48px}
.sg .vid{background:#fff;border:1px solid var(--line2);border-radius:var(--r-xl);overflow:hidden;box-shadow:var(--sh);transition:transform .2s,box-shadow .2s}
.sg .vid:hover{transform:translateY(-5px);box-shadow:var(--sh-lift)}
.sg .vid__thumb{position:relative;aspect-ratio:16/9;background:var(--grad-navy);display:grid;place-items:center;overflow:hidden}
.sg .vid__thumb::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 70% 20%,rgba(243,112,6,.35),transparent 60%)}
.sg .vid__thumb .logo__mark{position:absolute;left:16px;top:16px;width:30px;height:30px;box-shadow:none;opacity:.9}
.sg .vid__play{position:relative;width:60px;height:60px;border-radius:50%;background:rgba(255,255,255,.95);display:grid;place-items:center;box-shadow:0 12px 24px -8px rgba(0,0,0,.4);transition:transform .2s}
.sg .vid:hover .vid__play{transform:scale(1.08)}
.sg .vid__play svg{width:26px;height:26px;color:var(--flame);margin-left:3px}
.sg .vid__dur{position:absolute;right:12px;bottom:12px;background:rgba(1,15,51,.8);color:#fff;font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:6px}
.sg .vid__b{padding:20px 22px}
.sg .vid__b .tag{font-size:.68rem;font-weight:800;letter-spacing:.06em;color:var(--flame-700);text-transform:uppercase}
.sg .vid__b h4{font-size:1.02rem;font-weight:800;color:var(--navy);margin-top:6px;line-height:1.35}
.sg /* support */
.support{background:var(--grad-flame);color:#fff;border-radius:var(--r-2xl);padding:clamp(34px,5vw,60px);text-align:center;position:relative;overflow:hidden;box-shadow:var(--sh-lift)}
.sg .support::before{content:"";position:absolute;left:-90px;bottom:-110px;width:360px;height:360px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.22),transparent 62%)}
.sg .support::after{content:"";position:absolute;right:-70px;top:-90px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(255,176,32,.5),transparent 64%)}
.sg .support__in{position:relative;max-width:640px;margin-inline:auto}
.sg .support h2{font-size:clamp(1.7rem,3vw,2.5rem);font-weight:900;color:#fff}
.sg .support p{color:rgba(255,255,255,.95);margin-top:14px;font-size:1.08rem}
.sg .support__btns{display:flex;flex-wrap:wrap;gap:13px;justify-content:center;margin-top:28px}
@media (max-width:1080px){
.sg .guide-grid, .sg .vid-grid{grid-template-columns:1fr 1fr}
.sg .steps{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
.sg .guide-grid, .sg .vid-grid, .sg .steps{grid-template-columns:1fr}
.sg .support__btns .btn{flex:1 1 auto}
}
@media (prefers-reduced-motion:reduce){
.sg .btn:hover, .sg .step:hover, .sg .gcard:hover, .sg .vid:hover{transform:none}
}

/* ---- Real YouTube thumbnail backgrounds for the "Xem & làm theo" video cards ---- */
.sg .vid__bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.sg .vid__thumb::before{background:linear-gradient(180deg,rgba(2,10,28,.12),rgba(2,10,28,.52));z-index:1}
.sg .vid__play,.sg .vid__dur{z-index:2}

/* ── Hướng dẫn: mục lục + nội dung bài ────────────────────────────────────
   Thay cho lưới 6 thẻ tĩnh cũ. Mục lục dính (sticky) trên màn rộng để đọc bài
   dài vẫn thấy được các bài khác; trên điện thoại thì xếp trên nội dung. */
.sg .ghero__t{font-size:clamp(1.7rem,3.6vw,2.4rem);font-weight:900;color:#12243F;
  letter-spacing:-.02em;margin:0 0 6px}
.sg .gwrap{display:grid;grid-template-columns:288px minmax(0,1fr);gap:34px;align-items:start}
.sg .gnav{position:sticky;top:88px;max-height:calc(100vh - 110px);overflow:auto;
  border:1px solid #E2E8F0;border-radius:14px;padding:14px 6px 14px 14px;background:#fbfcfe}
.sg .gnav__hd{display:flex;justify-content:space-between;align-items:baseline;gap:8px;
  padding-right:8px;margin-bottom:10px;padding-bottom:9px;border-bottom:1px solid #E2E8F0}
.sg .gnav__hd b{font-size:.95rem;color:#12243F}
.sg .gnav__hd span{font-size:.78rem;color:#67758B}
.sg .gnav__empty{font-size:.85rem;color:#67758B;padding:8px 0}
.sg .gnav__g{margin-bottom:13px}
.sg .gnav__t{font-size:.73rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;
  color:#67758B;margin-bottom:5px}
.sg .gnav ul{list-style:none;margin:0;padding:0}
.sg .gnav li{margin:0}
.sg .gnav li a{display:block;padding:5px 9px;border-radius:8px;font-size:.875rem;
  line-height:1.4;color:#334155;text-decoration:none;border-left:2px solid transparent}
.sg .gnav li a:hover{background:#eef2f7;color:#12243F;text-decoration:none}
.sg .gnav li a.on{background:#FFF4E3;color:#B45309;font-weight:700;border-left-color:#F5A524}
.sg .gcrumb{display:flex;flex-wrap:wrap;gap:7px;font-size:.8rem;color:#67758B;margin-bottom:12px}
.sg .gcrumb a{color:#1D4ED8;text-decoration:none}
.sg .gcrumb a:hover{text-decoration:underline}
.sg .gart__h1{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:900;color:#12243F;
  letter-spacing:-.02em;line-height:1.25;margin:0 0 18px}
.sg .gart__body{max-width:none}
.sg .gart__body img{max-width:100%;height:auto;border-radius:10px;border:1px solid #E2E8F0}
.sg .gart__body table{width:100%;border-collapse:collapse;margin:14px 0;font-size:.9rem}
.sg .gart__body td,.sg .gart__body th{border:1px solid #E2E8F0;padding:7px 10px}
.sg .gart__body h2,.sg .gart__body h3{color:#12243F;margin-top:26px}
.sg .gpager{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-top:34px;
  padding-top:22px;border-top:1px solid #E2E8F0}
.sg .gpager__i{display:block;padding:12px 15px;border:1px solid #E2E8F0;border-radius:12px;
  text-decoration:none;background:#fff;transition:border-color .16s ease}
.sg .gpager__i:hover{border-color:#F5A524;text-decoration:none}
.sg .gpager__i span{display:block;font-size:.75rem;color:#67758B;margin-bottom:3px}
.sg .gpager__i b{display:block;font-size:.9rem;color:#12243F;line-height:1.35}
.sg .gpager__i--r{text-align:right}
@media(max-width:960px){
  .sg .gwrap{grid-template-columns:1fr;gap:24px}
  .sg .gnav{position:static;max-height:340px}
  .sg .gpager{grid-template-columns:1fr}
  .sg .gpager__i--r{text-align:left}
}