/* Góc Gọn. Tokens come from BRAND.md; edit there first. Light only. */
:root{
  color-scheme:light;
  --bg:#FFFFFF; --tint:#F4F4F5; --line:#E4E4E7;
  --ink:#18181B; --muted:#52525B; --accent:#C2410C;
  --r:10px;
  --font:'Be Vietnam Pro',system-ui,sans-serif; --mono:'JetBrains Mono',ui-monospace,monospace;
  --ease:cubic-bezier(.16,1,.3,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:400 17px/1.65 var(--font);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-underline-offset:3px}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:-999px}
.skip:focus{left:16px;top:8px;background:var(--ink);color:#fff;padding:8px 12px;border-radius:var(--r)}
.wrap{max-width:1760px;margin:0 auto;padding:0 clamp(16px,5vw,96px)}
.narrow{max-width:880px}

/* header */
header .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:19px;letter-spacing:-.02em}
.logo img{border-radius:6px}
nav{display:flex;gap:28px}
nav a{white-space:nowrap;text-decoration:none;color:var(--muted);font-size:15px;padding:8px 0;background:linear-gradient(currentColor,currentColor) 0 calc(100% - 4px)/0 1px no-repeat;transition:background-size .3s var(--ease),color .2s}
nav a:hover{background-size:100% 1px}
nav a:hover{color:var(--ink)}
nav a[aria-current]{color:var(--ink);font-weight:600}

/* type */
h1{font-size:clamp(36px,5vw,60px);line-height:1.05;letter-spacing:-.035em;font-weight:800;margin:0 0 20px}
h2{font-size:clamp(28px,3.4vw,40px);line-height:1.1;letter-spacing:-.03em;font-weight:800;margin:0 0 14px}
h3{font-size:17px;line-height:1.35;font-weight:600;margin:0}
.lead{color:var(--muted);max-width:56ch;margin:0 0 40px}

/* buttons and links */
.btn{display:inline-block;text-decoration:none;font-weight:600;font-size:16px;padding:14px 26px;border-radius:999px;background:var(--ink);color:#fff;white-space:nowrap;transition:translate .2s var(--ease),scale .12s var(--ease),background .2s}
.btn:hover{background:#3F3F46;translate:0 -2px}
.btn:active{scale:.97;translate:0}
.more{font-weight:600;text-decoration:none;border-bottom:1.5px solid currentColor;padding-bottom:2px}
.more:hover{color:var(--accent)}
.more::after{content:"\2192";display:inline-block;margin-left:6px;transition:translate .25s var(--ease)}
a:hover .more::after,.more:hover::after{translate:4px 0}
.shopee{font-weight:600;font-size:15px;color:var(--accent);text-decoration:none}
.shopee::after{content:"\2197";display:inline-block;margin-left:4px;transition:translate .2s var(--ease)}
.shopee:hover::after{translate:2px -2px}
.shopee:hover{text-decoration:underline}

/* images: radius lock + hover */
.media{border-radius:var(--r);overflow:hidden;background:var(--tint)}
.media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
a:hover .media img,.tile:hover .media img{transform:scale(1.04)}

/* sections */
section{padding:88px 0}
.rule{border-top:1px solid var(--line)}

/* hero: asymmetric split */
.hero{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding-top:48px;padding-bottom:88px}
.hero h1{font-size:clamp(36px,4.4vw,54px)}
.hero p{font-size:19px;color:var(--muted);max-width:40ch;margin:0 0 32px}
.hero .media{aspect-ratio:5/4}
/* motion: uses translate/scale (not transform) so hover and press effects still compose */
@media (prefers-reduced-motion:no-preference){
  .hero h1,.hero p,.hero .btn{animation:rise .8s var(--ease) backwards}
  .hero p{animation-delay:.08s}
  .hero .btn{animation-delay:.16s}
  .hero .media{animation:unveil 1.1s var(--ease) .12s backwards}
  .hero .media img{animation:settle 1.6s var(--ease) .12s backwards}
  /* terminal caret: the one ambient loop on the page */
  .hero h1::after{content:"";display:inline-block;width:.07em;height:.85em;margin-left:.1em;vertical-align:-.06em;background:currentColor;animation:blink 1.1s steps(1) infinite}

  /* scroll reveal; browsers without scroll timelines just show content */
  @supports (animation-timeline:view()){
    section h2,.lead,.tile,.trust>p,.trust>small,.page h2,.page .media,.note{
      animation:rise var(--ease) backwards;animation-timeline:view();animation-range:entry 0% entry 70%}
    .tiles .tile:nth-child(4n+2){animation-range:entry 10% entry 80%}
    .tiles .tile:nth-child(4n+3){animation-range:entry 20% entry 90%}
    .tiles .tile:nth-child(4n+4){animation-range:entry 30% entry 100%}
  }
}
@keyframes rise{from{opacity:0;translate:0 24px}}
@keyframes unveil{from{opacity:0;clip-path:inset(6% round var(--r))}}
@keyframes settle{from{scale:1.08}}
@keyframes blink{50%{opacity:0}}

/* budget filter */
.budget{max-width:560px;margin:0 0 48px}
.budget label{display:flex;justify-content:space-between;align-items:baseline;gap:16px;font-weight:600}
.budget output{font:500 32px/1.1 var(--mono);letter-spacing:-.03em}
.budget input{width:100%;margin:16px 0 8px;accent-color:var(--ink);cursor:pointer}
.budget p{margin:0;font-size:15px;color:var(--muted)}
.tile[hidden],.budget[hidden]{display:none}

/* product tiles: no boxes */
.tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:48px 28px}
.tile{display:flex;flex-direction:column;gap:6px}
.tile .media{aspect-ratio:1;margin-bottom:10px}
.price{font:500 14px var(--mono);color:var(--accent)}
.tile p{margin:0 0 6px;font-size:15px;line-height:1.55;color:var(--muted);flex:1}

/* trust: manifesto stack */
.trust{max-width:62ch}
.trust p{font-size:19px;margin:0 0 20px}
.trust small{display:block;font:400 15px/1.6 var(--font);color:var(--muted);margin:0 0 28px}

/* article pages */
.page{padding-top:56px;padding-bottom:96px}
.page h1{font-size:clamp(32px,4.4vw,48px)}
.page h2{font-size:clamp(24px,2.6vw,30px);margin-top:56px}
.page p,.page li{max-width:66ch}
.page .media{margin:32px 0;aspect-ratio:4/3}
.note{background:var(--tint);padding:18px 22px;border-radius:var(--r)}
.todo{background:#FFF7E6;color:#92400E;padding:0 4px;border-radius:4px;font-family:var(--mono);font-size:.88em}

/* footer: white, hairline */
footer{border-top:1px solid var(--line);padding:48px 0 56px;font-size:14px;color:var(--muted)}
footer .wrap{display:grid;grid-template-columns:1fr auto;gap:24px 64px}
footer p{margin:0 0 6px;max-width:60ch}
footer p:first-child{color:var(--ink);font-weight:600}
footer nav{flex-direction:column;gap:2px}
footer nav a{font-size:14px;padding:4px 0}

/* product page: gallery left, sticky buy box right, review below */
.pdp-page{padding-top:40px;padding-bottom:96px}
.pdp-page>.back{margin-bottom:28px}
.pdp{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,5fr);gap:clamp(32px,5vw,88px);align-items:start}
.pdp-main{aspect-ratio:1}
/* desktop: thumbnails as a column left of the main image, so all of them stay in view */
.pdp-gallery{display:grid;grid-template-columns:76px minmax(0,1fr);gap:14px;align-items:start}
.pdp-main{grid-column:2;grid-row:1}
.thumbs{grid-column:1;grid-row:1;display:grid;gap:10px}
.thumbs a{aspect-ratio:1;opacity:.55;transition:opacity .2s}
.thumbs a:hover,.thumbs a[aria-current]{opacity:1}
.thumbs a[aria-current]{box-shadow:0 0 0 2px var(--ink)}
.pdp-info{position:sticky;top:24px;display:flex;flex-direction:column;align-items:flex-start;gap:14px}
.pdp-info h1{font-size:clamp(30px,3.2vw,44px);margin:0}
.pdp-info .price{font-size:18px}
.pdp-info .price span{font:400 13px var(--font);color:var(--muted);margin-left:6px}
.pdp-summary{font-size:18px;margin:6px 0 10px;max-width:52ch}
.pdp-fit{margin:18px 0 0;padding-top:20px;border-top:1px solid var(--line);display:grid;grid-template-columns:auto 1fr;gap:10px 20px;font-size:15px}
.pdp-fit dt{font-weight:600}
.pdp-fit dd{margin:0;color:var(--muted)}
.pdp-label{font-size:13px;color:var(--muted);margin:0}
.pdp-review{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,88px);margin-top:88px;padding-top:56px;border-top:1px solid var(--line)}
.pdp-page h2{font-size:clamp(22px,2.4vw,28px)}
.pdp-review ul{margin:0;padding-left:20px;max-width:60ch}
.pdp-review li{margin-bottom:10px}
.pdp-review li::marker{color:var(--accent)}
.pdp-verdict{margin-top:56px;background:var(--tint);border-radius:var(--r);padding:clamp(28px,4vw,56px);display:grid;justify-items:start;gap:14px}
.pdp-verdict h2{margin:0}
.pdp-verdict p{font-size:19px;max-width:62ch;margin:0 0 6px}
.pdp-verdict small,.pdp-verdict .sources{font-size:14px;color:var(--muted);margin:0}
.sources a{margin-right:12px}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::after{transition:none!important}}

@media (max-width:860px){
  nav{gap:14px}

  nav a{font-size:14px}
  nav a:first-child{display:none}
  section{padding:56px 0}
  .hero,footer .wrap{grid-template-columns:1fr}
  .hero{gap:32px;padding-top:32px;padding-bottom:56px}
  .tiles{grid-template-columns:repeat(2,1fr);gap:36px 16px}
  .pdp,.pdp-review{grid-template-columns:1fr}
  .pdp-info{position:static}
  .pdp-review{margin-top:56px;padding-top:40px}
  .pdp-gallery{grid-template-columns:1fr}
  .pdp-main,.thumbs{grid-column:1;grid-row:auto}
  .thumbs{grid-template-columns:repeat(5,1fr);gap:8px}
}
@media (max-width:480px){
  .tile p{font-size:14px}
}

/* product detail pages */
.tile h3 a{text-decoration:none}
.tile h3 a:hover{text-decoration:underline}
.back{display:inline-block;margin-bottom:28px;font-size:15px}
.back::after{content:none}
.back::before{content:"\2190";margin-right:6px}
.page .price{margin:-8px 0 16px}
.sold{font-size:13px;color:var(--muted)}
.contact{display:flex;flex-wrap:wrap;gap:12px}
.contact .btn{display:inline-flex;align-items:center;gap:10px}
.contact svg{width:20px;height:20px}