/* Trang Hướng dẫn pha (/huong-dan-pha/). Chỉ tải ở trang này. Dùng biến màu của main.css. */
.bw{--bw-gut:clamp(16px,4vw,64px);--bw-tint:#EFE4D6;position:relative;overflow-x:clip}
#bw-gl{position:fixed;inset:0;width:100%;height:100%;z-index:5;pointer-events:none}

/* ô đặt vật thể 3D: vật thể bám theo ô khi cuộn */
.bw-slot{position:relative;z-index:2;aspect-ratio:4/5;display:grid;place-items:center}
.bw-slot::before{content:"";width:78%;aspect-ratio:1;border-radius:50%;background:radial-gradient(circle at 50% 40%,#fff 0%,var(--bw-tint) 70%);opacity:.9}
.bw-slot::after{content:"";position:absolute;bottom:9%;left:28%;right:28%;height:16px;border-radius:50%;background:radial-gradient(closest-side,rgba(35,31,32,.22),transparent)}

.bw-hero{position:relative;min-height:calc(100svh - 72px);display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);align-items:center;gap:clamp(24px,5vw,80px);padding:40px var(--bw-gut) 60px}
.bw-hero h1{margin:0;font-weight:800;font-size:clamp(44px,6.6vw,104px);line-height:.98;letter-spacing:-.035em;text-wrap:balance}
.bw-hero h1 span{color:var(--maroon)}
.bw-hero__copy{display:flex;flex-direction:column;gap:22px;position:relative;z-index:6}
.bw-hero .bw-slot{width:min(100%,460px);justify-self:center}
.bw-kick{margin:0;font-size:13px;font-weight:600;color:var(--maroon)}
.bw-lead{margin:0;max-width:46ch;color:var(--ink-2);font-size:16px}
.bw-methods{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none}
.bw-methods a{display:block;text-decoration:none;font-size:13px;font-weight:600;padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink);transition:border-color .2s,color .2s}
.bw-methods a:hover{border-color:var(--maroon);color:var(--maroon)}

/* chương: chữ lớn co theo độ dài từ (--n = số ký tự) để không bị che khi xem toàn màn hình */
.bw-ch{--bw-word:min(19vw,calc(118vw / var(--n,6)),330px,34vh);position:relative;padding:clamp(90px,12vw,170px) var(--bw-gut);display:grid;grid-template-columns:repeat(12,minmax(0,1fr));align-items:center;gap:clamp(20px,3vw,48px);overflow:clip}
.bw-word{position:absolute;z-index:0;left:0;right:0;top:clamp(40px,7vw,90px);margin:0;text-align:center;font-weight:900;font-size:var(--bw-word);line-height:.8;letter-spacing:-.055em;color:var(--maroon);white-space:nowrap;pointer-events:none;user-select:none;will-change:transform}
.bw-ch .bw-slot{grid-column:2 / span 5}
.bw-info{position:relative;z-index:6;grid-column:8 / span 4;display:flex;flex-direction:column;gap:18px;align-self:start;margin-top:calc(clamp(40px,7vw,90px) + var(--bw-word) * .82 - clamp(90px,12vw,170px) + 32px)}
.bw-ch--flip .bw-slot{grid-column:7 / span 5;grid-row:1}
.bw-ch--flip .bw-info{grid-column:2 / span 4;grid-row:1}
.bw-num{font-size:13px;font-weight:700;color:var(--maroon);margin:0}
.bw-info h2{margin:0;font-weight:800;font-size:clamp(28px,3.2vw,48px);line-height:1.05;letter-spacing:-.025em;text-wrap:balance}
.bw-info .bw-lead{font-size:15px}
.bw-grind{display:flex;align-items:center;gap:12px;margin:0;font-size:13px;color:var(--ink-2)}
.bw-grind b{color:var(--ink);font-weight:600}
.bw-scale{display:flex;gap:4px}
.bw-scale i{width:18px;height:6px;border-radius:3px;background:var(--line)}
.bw-scale i.on{background:var(--kraft)}
.bw-facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 20px;margin:0;padding:16px 0;border-block:1px solid var(--line)}
.bw-facts div{min-width:0}
.bw-facts dt{font-size:12px;color:var(--ink-2)}
.bw-facts dd{margin:2px 0 0;font-weight:700;font-size:18px;font-variant-numeric:tabular-nums}
.bw-steps{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:10px;counter-reset:s}
.bw-steps li{position:relative;padding-left:34px;color:var(--ink-2);font-size:14px;line-height:1.55;counter-increment:s}
.bw-steps li::before{content:counter(s);position:absolute;left:0;top:0;width:22px;height:22px;border-radius:50%;background:var(--bw-tint);color:var(--maroon);font-size:12px;font-weight:700;display:grid;place-items:center}

/* nội dung hiện dần khi cuộn tới (chỉ khi có JS và không bật giảm chuyển động) */
.js-motion .bw-info>*{opacity:0;transform:translateY(28px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.js-motion .bw-info.is-in>*{opacity:1;transform:none}
.js-motion .bw-info.is-in>*:nth-child(2){transition-delay:.06s}
.js-motion .bw-info.is-in>*:nth-child(3){transition-delay:.12s}
.js-motion .bw-info.is-in>*:nth-child(4){transition-delay:.18s}
.js-motion .bw-info.is-in>*:nth-child(5){transition-delay:.24s}

.bw-end{position:relative;width:min(1240px,calc(100% - var(--bw-gut) * 2));margin:clamp(24px,4vw,56px) auto var(--bw-gut);box-sizing:border-box;border-radius:28px;background:var(--maroon);color:#fff;padding:clamp(44px,6vw,84px) var(--bw-gut);text-align:center;overflow:hidden}
.bw-end h2{margin:0 auto;max-width:22ch;font-weight:800;font-size:clamp(26px,3.2vw,44px);line-height:1.1;letter-spacing:-.02em;color:#fff;text-wrap:balance}
.bw-end p{margin:14px auto 24px;max-width:52ch;font-size:15px;color:rgba(255,255,255,.8)}
.bw-end .btn{flex:none;min-height:44px;padding:0 22px;font-size:14px;border-radius:999px}
.bw-end__in{position:relative;z-index:6;display:flex;flex-direction:column;align-items:center}

@media (max-width:860px){
  .bw-hero{grid-template-columns:1fr;padding-top:28px;gap:8px;min-height:0}
  .bw-hero .bw-slot{width:min(80%,360px)}
  .bw-ch{--bw-word:min(23vw,calc(116vw / var(--n,6)));grid-template-columns:1fr;padding-top:clamp(100px,24vw,150px);gap:8px}
  .bw-ch .bw-slot,.bw-ch--flip .bw-slot,.bw-info,.bw-ch--flip .bw-info{grid-column:1;grid-row:auto}
  .bw-ch .bw-slot{width:min(86%,400px);justify-self:center}
  .bw-info{margin-top:0}
  .bw-ch--grind .bw-info{order:-1;margin-top:calc(var(--bw-word) * .6)}  /* máy xay nằm ngay trên phin để dòng bột không chạy qua chữ */
}
@media (prefers-reduced-motion:reduce){.js-motion .bw-info>*{opacity:1;transform:none;transition:none}}