/* Thaoux — giao diện theo phong cách portfolio Cherri (giấy ngà, serif Fraunces, mono IBM Plex) */
:root {
  --ink: #24565b;
  --ink-deep: #173f43;
  --paper: #f6f1e9;
  --paper-glass: #f6f1e9f2;
  --paper-deep: #e8dfd4;
  --signature: #df6682;
  --orange: #ed7d4c;
  --electric: #596bd3;
  --acid: #b8cf63;
  --olive: #7f9f24;
  --pink: #d95d8c;
  --charcoal: #292d2d;
  --gold: #c49a52;
  --ash: #8c877d;
  --line: #1715122e;
  --white: #ffffff;
  --shade: #171512;
  --serif: "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans: "Inter", Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --gutter: max(16px, 5vw);
  --header-h: 82px;
  --ease: cubic-bezier(.22, .72, .24, 1);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body { margin: 0; background: var(--paper); color: var(--charcoal); font: 15px/1.6 var(--sans); overflow-x: clip; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3 { margin: 0; }
em { font-style: italic; }
:focus-visible { outline: 2px solid var(--electric); outline-offset: 3px; }

.eyebrow { font: 500 10px/1.5 var(--mono); letter-spacing: .16em; margin: 0; color: var(--electric); }
.intro { font-size: 16px; line-height: 1.65; max-width: 560px; color: var(--charcoal); }
.empty { font: 500 11px var(--mono); color: var(--ash); letter-spacing: .06em; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 50; height: var(--header-h);
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 28px;
  padding: 0 max(16px, 3.5vw); background: var(--paper-glass); border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
}
.logo { font: 600 15px var(--mono); letter-spacing: .08em; justify-self: start; }
.logo span { color: var(--orange); margin-left: 5px; }
.site-nav { display: flex; gap: 28px; }
.site-nav a, .menu nav a { font-size: 12px; letter-spacing: .03em; position: relative; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -8px; height: 1px; background: var(--orange); transition: right .25s; }
.site-nav a:hover::after, .site-nav a.active::after { right: 0; }
.header-tools { justify-self: end; display: flex; align-items: center; gap: 10px; }
.lang-switch, .header-cta, .menu summary { font: 500 11px var(--mono); letter-spacing: .06em; border: 1px solid var(--line); padding: 12px 14px; transition: background .2s, color .2s; }
.lang-switch:hover, .header-cta:hover { background: var(--charcoal); color: var(--paper); }
.menu { display: none; position: relative; }
.menu summary { list-style: none; cursor: pointer; }
.menu summary::-webkit-details-marker { display: none; }
.menu nav { position: absolute; right: 0; top: calc(100% + 8px); min-width: 180px; display: grid; background: var(--paper); border: 1px solid var(--line); box-shadow: 4px 5px 0 var(--line); }
.menu nav a { padding: 14px 18px; border-bottom: 1px solid var(--line); }
.menu nav a:last-child { border-bottom: 0; }
.menu nav a.active { color: var(--electric); }

/* ---------- Buttons ---------- */
.button { min-height: 52px; display: inline-flex; align-items: center; justify-content: space-between; gap: 34px; font: 600 11px var(--mono); letter-spacing: .06em; border: 0; cursor: pointer; }
.primary-button { background: var(--electric); color: var(--white); min-width: 215px; padding: 0 20px; transition: background .2s; }
.primary-button:hover { background: var(--ink-deep); }
.text-button { color: var(--charcoal); border-bottom: 1px solid var(--charcoal); min-height: 0; padding-bottom: 6px; }
.arrow-link { display: block; width: max-content; max-width: 100%; margin: 28px 0 0 auto; padding-bottom: 7px; border-bottom: 1px solid var(--line); font: 600 10px var(--mono); letter-spacing: .08em; }
.arrow-link:hover { color: var(--electric); border-color: var(--electric); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden; min-height: 100vh;
  display: grid; grid-template-columns: minmax(0, 1.06fr) minmax(380px, .94fr); align-items: center; gap: 5vw;
  padding: 150px var(--gutter) 110px;
}
.hero::before { content: ""; position: absolute; top: 18%; left: -20vw; width: 38vw; height: 38vw; border: 1px solid var(--line); border-radius: 50%; }
.hero-badge {
  position: absolute; z-index: 3; top: 116px; left: 58%; display: flex; align-items: center; gap: 9px; padding: 9px 14px;
  border: 1px solid var(--charcoal); border-radius: 999px; background: var(--paper); font: 600 8px var(--mono); letter-spacing: .13em; transform: rotate(-4deg);
}
.hero-badge i { color: var(--signature); font: 400 20px/1 var(--sans); font-style: normal; }
.hero-copy { position: relative; z-index: 2; }
.hero-copy > * { animation: rise .72s var(--ease) both; }
.hero-copy > :nth-child(2) { animation-delay: .1s; }
.hero-copy > :nth-child(3) { animation-delay: .24s; }
.hero-copy > :nth-child(4) { animation-delay: .38s; }
.hero .eyebrow { margin-bottom: 26px; }
.brand-heading { font: 600 clamp(48px, 7vw, 112px)/.9 var(--serif); letter-spacing: -.05em; max-width: 900px; }
.brand-heading > span { display: block; }
.rotating { display: block; min-height: .95em; margin-top: .06em; font-weight: 500; transition: opacity .22s, transform .22s, filter .22s, color .32s; }
.rotating.is-changing { opacity: 0; filter: blur(5px); transform: translateY(12px); }
.tone-coral { color: var(--signature); }
.tone-orange { color: var(--orange); }
.tone-petrol { color: var(--ink); }
.tone-electric { color: var(--electric); }
.tone-gold { color: var(--gold); }
.hero .intro { margin: 30px 0 0; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 26px; margin-top: 36px; }
.hero-art { position: relative; isolation: isolate; height: min(70vh, 720px); min-height: 520px; overflow: hidden; background: #cbd7d3; animation: art-in .9s var(--ease) .5s both; }
.hero-art::before { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(#0000 48%, #171512ad); }
.hero-art::after { content: ""; position: absolute; inset: 0; z-index: 2; border: 1px solid #ffffff40; pointer-events: none; }
.hero-art > img { width: 100%; height: 100%; object-fit: cover; object-position: center 30%; }
.hero-title-card { position: absolute; z-index: 3; left: 7%; bottom: 15%; display: flex; flex-direction: column; color: var(--white); }
.hero-title-card small { font: 500 9px var(--mono); letter-spacing: .12em; }
.hero-title-card strong { font: 600 clamp(56px, 7vw, 104px)/1 var(--serif); letter-spacing: -.04em; }
.hero-name { position: absolute; z-index: 3; right: 6%; bottom: 6%; margin: 0; text-align: right; color: var(--white); font: 600 10px/1.6 var(--mono); letter-spacing: .12em; }
.hero-name b { font: 500 13px var(--serif); letter-spacing: 0; }
.hero-scroll-cue { position: absolute; z-index: 5; inset: auto var(--gutter) 22px; display: grid; grid-template-columns: auto 1fr; align-items: end; gap: 7px 22px; color: var(--ink-deep); }
.hero-scroll-cue strong { font: 500 clamp(18px, 2vw, 27px)/1 var(--serif); letter-spacing: -.02em; }
.hero-scroll-cue > span { justify-self: end; font: 600 8px var(--mono); letter-spacing: .15em; color: var(--orange); }
.hero-scroll-cue > i { grid-column: 1 / -1; display: grid; grid-template-columns: 5fr 1.2fr .8fr; height: 4px; }
.hero-scroll-cue > i b:nth-child(1) { background: var(--ink); }
.hero-scroll-cue > i b:nth-child(2) { background: var(--orange); }
.hero-scroll-cue > i b:nth-child(3) { background: var(--signature); }

@keyframes rise { from { opacity: 0; transform: translateY(24px); } }
@keyframes art-in { from { opacity: 0; transform: scale(.985); } }

/* ---------- Marquee (khách hàng, craft wall, ghi chú) ---------- */
.marquee { display: flex; overflow: hidden; }
.marquee-track { display: flex; flex-shrink: 0; gap: 16px; padding-right: 16px; margin: 0; list-style: none; animation: marquee 60s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-100%); } }

/* ---------- Clients ---------- */
.clients { display: grid; gap: 24px; padding: 40px 0 44px; border-block: 1px solid var(--line); }
.clients-label { margin: 0; padding: 0 var(--gutter); font: 600 10px var(--mono); letter-spacing: .12em; }
.clients-label span { margin-left: 14px; color: var(--ash); font-weight: 500; }
.clients .marquee-track { animation-duration: 80s; gap: 0; padding: 0; }
.clients li { flex: 0 0 150px; height: 96px; display: grid; place-items: center; background: var(--white); border: 1px solid var(--line); margin-right: 16px; }
.clients li img { max-width: 120px; max-height: 70px; object-fit: contain; filter: grayscale(1); opacity: .8; transition: filter .3s, opacity .3s; }
.clients li:hover img { filter: none; opacity: 1; }

/* ---------- Sections chung ---------- */
.section { padding: 115px var(--gutter); }
.section + .section, .case-list + .section { border-top: 1px solid var(--line); }
.section-label { display: flex; align-items: flex-start; gap: 14px; }
.section-label span { font: 500 10px var(--mono); color: var(--electric); padding-top: 2px; }
.section-label p { margin: 0; font: 600 10px/1.45 var(--mono); letter-spacing: .12em; }
.product, .cases, .craft, .process, .recognition { display: grid; grid-template-columns: 1fr 3fr; gap: 0 5vw; }
.section-head { position: relative; }
.section-head h2 { font: 600 clamp(42px, 6.6vw, 104px)/.92 var(--serif); letter-spacing: -.05em; max-width: 1000px; }
.section-head h2 em, .page-hero h1 em { color: var(--electric); font-weight: 500; }
.section-head > p { max-width: 620px; margin: 30px 0 0; font-size: 15px; line-height: 1.6; color: var(--ash); }
.sticker {
  position: absolute; top: -18px; right: 0; display: flex; align-items: center; gap: 8px; height: 46px; padding: 0 16px;
  border: 1px solid #17151238; border-radius: 999px; background: var(--paper); box-shadow: 3px 4px 0 var(--line); transform: rotate(4deg);
}
.sticker b { font: 600 18px/.9 var(--serif); letter-spacing: -.03em; }
.sticker span { font: 600 7px/1.3 var(--mono); letter-spacing: .12em; }

/* ---------- About ---------- */
.about { display: grid; grid-template-columns: 1fr 3fr; gap: 46px 5vw; }
.lead { margin: 0; font: 600 clamp(40px, 5.4vw, 84px)/.95 var(--serif); letter-spacing: -.05em; }
.about-text { max-width: 760px; margin: 28px 0 0; font-size: 17px; line-height: 1.65; }
.fields { display: grid; grid-template-columns: 1fr 1fr; margin-top: 56px; }
.field-card { position: relative; isolation: isolate; overflow: hidden; min-height: 320px; padding: 30px; display: flex; flex-direction: column; }
.field-card::after { content: ""; position: absolute; z-index: -1; left: -60%; bottom: -150%; width: 150%; aspect-ratio: 1; border-radius: 50%; background: #ffffff33; transition: bottom .55s var(--ease); }
.field-card:hover::after { bottom: -70%; }
.field-card.is-product { background: var(--electric); color: var(--white); }
.field-card.is-creative { background: var(--orange); color: #182d32; }
.field-card .kicker { font: 600 10px var(--mono); letter-spacing: .16em; opacity: .8; }
.field-card h3 { margin-top: 18px; font: 600 clamp(34px, 3.6vw, 56px)/.95 var(--serif); letter-spacing: -.04em; }
.field-card ul { list-style: none; margin: 22px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.field-card li { font: 500 11px var(--mono); padding: 6px 10px; border: 1px solid currentColor; border-radius: 999px; opacity: .9; }
.field-card a { margin-top: auto; padding-top: 30px; font: 600 10px var(--mono); letter-spacing: .1em; }
.field-card a:hover { text-decoration: underline; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); margin-top: 56px; }
.stats > div { padding: 26px 18px 0 0; }
.stats strong { display: block; font: 600 clamp(40px, 4.6vw, 70px)/1 var(--serif); letter-spacing: -.04em; color: var(--ink); }
.stats > div:nth-child(2) strong { color: var(--orange); }
.stats > div:nth-child(3) strong { color: var(--olive); }
.stats > div:nth-child(4) strong { color: var(--signature); }
.stats span { display: block; margin-top: 10px; font: 600 9px/1.6 var(--mono); letter-spacing: .12em; color: var(--ash); }

/* ---------- Product ---------- */
.product-grid { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr)); gap: 24px; margin-top: 64px; }
.product .product-grid { grid-column: 2; }
.product-card { display: flex; flex-direction: column; background: var(--white); border: 1px solid var(--line); transition: transform .3s var(--ease), box-shadow .3s; }
.product-card:hover { transform: translateY(-4px); box-shadow: 6px 8px 0 var(--line); }
.product-art { aspect-ratio: 16 / 10; overflow: hidden; background: var(--paper-deep); }
.product-art img { width: 100%; height: 100%; object-fit: cover; }
.palette-art { position: relative; display: grid; grid-template-columns: 5fr 2fr 1.4fr 1fr; width: 100%; height: 100%; }
.palette-art b { position: absolute; left: 24px; bottom: 16px; font: 600 72px/1 var(--serif); letter-spacing: -.05em; color: var(--white); mix-blend-mode: soft-light; }
.product-body { flex: 1; display: flex; flex-direction: column; gap: 10px; padding: 22px 24px 24px; }
.product-body .num { font: 500 10px var(--mono); color: var(--electric); }
.product-body h3 { font: 600 30px/1 var(--serif); letter-spacing: -.03em; }
.product-body p { margin: 0; color: var(--ash); font-size: 14px; }
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0 0; padding: 0; }
.tags li { font: 500 10px var(--mono); padding: 3px 9px; border: 1px solid var(--line); border-radius: 999px; }
.product-body > i { margin-top: auto; padding-top: 12px; font: 600 10px var(--mono); font-style: normal; letter-spacing: .08em; color: var(--electric); }

/* ---------- Cases (accordion) ---------- */
.cases { padding-bottom: 90px; }
.case { border-top: 1px solid var(--line); scroll-margin-top: var(--header-h); }
.case:last-child { border-bottom: 1px solid var(--line); }
.case summary {
  list-style: none; cursor: pointer; display: grid; grid-template-columns: 60px minmax(0, 1fr) auto 120px 44px; align-items: center; gap: 24px;
  padding: 18px var(--gutter); transition: background .25s;
}
.case summary::-webkit-details-marker { display: none; }
.case summary:hover { background: #ffffff70; }
.case-num { font: 500 11px var(--mono); color: var(--electric); }
.case:nth-child(4n+2) .case-num { color: var(--orange); }
.case:nth-child(4n+3) .case-num { color: var(--olive); }
.case:nth-child(4n+4) .case-num { color: var(--signature); }
.case-name { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.case-name small { font: 500 9px var(--mono); letter-spacing: .12em; color: var(--ash); }
.case-name strong { font: 600 clamp(26px, 3.2vw, 46px)/1 var(--serif); letter-spacing: -.04em; }
.chips { display: flex; gap: 4px; }
.chips i { width: 22px; height: 22px; border-radius: 50%; border: 1px solid var(--line); }
.case-thumb { width: 120px; height: 72px; object-fit: cover; transition: opacity .25s; }
.case[open] .case-thumb { opacity: 0; }
.case-toggle { width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; font: 400 22px/1 var(--sans); transition: transform .3s var(--ease), background .2s; }
.case[open] .case-toggle { transform: rotate(45deg); background: var(--charcoal); color: var(--paper); }
.case-panel { display: grid; grid-template-columns: 1.4fr 1fr; gap: 5vw; padding: 10px var(--gutter) 60px; animation: rise .45s var(--ease); }
.case-gallery img { width: 100%; height: auto; background: var(--paper-deep); }
.case-gallery.is-multi { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.case-gallery.is-multi img:first-child { grid-column: 1 / -1; }
.case-text { align-self: start; position: sticky; top: calc(var(--header-h) + 24px); }
.case-text .eyebrow { color: var(--ash); }
.case-text h3 { margin-top: 14px; font: 600 clamp(36px, 4vw, 60px)/.95 var(--serif); letter-spacing: -.045em; }
.tagline { margin: 16px 0 0; font: 500 italic 20px/1.35 var(--serif); color: var(--ink); }
.case-text dl { margin: 30px 0 0; border-top: 1px solid var(--line); }
.case-text dl > div { display: grid; grid-template-columns: 110px 1fr; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.case-text dt { font: 600 9px/1.9 var(--mono); letter-spacing: .12em; color: var(--electric); }
.case-text dd { margin: 0; font-size: 14px; }
.role { margin: 20px 0 0; font: 600 9px var(--mono); letter-spacing: .12em; color: var(--ash); }
.role b { display: block; margin-top: 6px; font: 500 14px var(--sans); letter-spacing: 0; color: var(--charcoal); }

/* ---------- Craft wall ---------- */
.craft-marquee { grid-column: 1 / -1; margin: 64px calc(var(--gutter) * -1) 0; }
.craft-card { flex: 0 0 clamp(260px, 25vw, 400px); margin: 0; }
.craft-art { aspect-ratio: 4 / 3; overflow: hidden; background: var(--paper-deep); }
.craft-art img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.craft-card:hover .craft-art img { transform: scale(1.04); }
.craft-card figcaption { display: flex; justify-content: space-between; align-items: baseline; gap: 20px; padding-top: 12px; }
.craft-card h3 { font: 600 15px var(--serif); }
.craft-card p { margin: 0; font: 500 9px var(--mono); color: var(--ash); white-space: nowrap; }
.craft .arrow-link { grid-column: 1 / -1; }

/* ---------- Process ---------- */
.process { row-gap: 75px; }
.burst {
  position: absolute; top: -30px; right: 0; width: 110px; aspect-ratio: 1; display: grid; place-content: center; text-align: center; color: var(--ink-deep); background: var(--acid);
  clip-path: polygon(50% 0, 60% 28%, 82% 9%, 76% 36%, 100% 35%, 80% 52%, 98% 67%, 72% 66%, 80% 94%, 58% 74%, 49% 100%, 41% 74%, 17% 92%, 27% 64%, 0 63%, 23% 49%, 2% 32%, 29% 35%, 20% 7%, 41% 26%);
}
.burst b { font: 600 30px/1 var(--serif); }
.burst span { font: 600 7px var(--mono); letter-spacing: .15em; }
.steps { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); border-block: 1px solid var(--line); }
.step { position: relative; isolation: isolate; min-height: 270px; padding: 26px 22px 24px; display: flex; flex-direction: column; justify-content: space-between; border-right: 1px solid var(--line); }
.step:last-child { border-right: 0; }
.step::before { content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0; transform: scaleY(.82); transform-origin: bottom; transition: opacity .28s, transform .42s var(--ease); }
.step:hover::before { opacity: 1; transform: none; }
.step:nth-child(4n+1)::before { background: #596bd31a; }
.step:nth-child(4n+2)::before { background: #ed7d4c1f; }
.step:nth-child(4n+3)::before { background: #b8cf6329; }
.step:nth-child(4n+4)::before { background: #d95d8c1a; }
.step::after { content: "→"; position: absolute; z-index: 2; top: 50%; right: 0; width: 30px; height: 30px; display: grid; place-items: center; transform: translate(50%, -50%); background: var(--paper); border: 1px solid var(--line); border-radius: 50%; color: var(--electric); font: 500 16px/1 var(--sans); }
.step:last-child::after { display: none; }
.step > span { font: 600 11px var(--mono); letter-spacing: .08em; color: var(--electric); }
.step:nth-child(3n+2) > span { color: var(--orange); }
.step:nth-child(3n) > span { color: var(--ink); }
.step h3 { font: 600 clamp(24px, 2.2vw, 35px)/.98 var(--serif); letter-spacing: -.035em; }
.step p { margin: 18px 0 0; font: 500 10px/1.55 var(--mono); color: var(--ash); }

/* ---------- Creative note ---------- */
.creative-note { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 34px; min-height: 136px; padding-left: var(--gutter); background: #24565b09; border-block: 1px solid #24565b38; overflow: hidden; }
.note-label { margin: 0; display: flex; align-items: center; gap: 10px; font: 600 9px var(--mono); letter-spacing: .14em; color: var(--ink); white-space: nowrap; }
.note-label i { width: 10px; height: 10px; border-radius: 50%; background: var(--signature); }
.note-marquee .marquee-track { gap: 60px; padding-right: 60px; animation-duration: 40s; }
.note-marquee span { font: 500 italic clamp(22px, 2.6vw, 38px)/1 var(--serif); color: var(--ink); white-space: nowrap; letter-spacing: -.02em; }

/* ---------- Recognition ---------- */
.recognition { overflow: hidden; }
.recognition-list { margin-top: 65px; border-top: 1px solid var(--line); }
.recognition-list article { display: grid; grid-template-columns: 60px 1fr auto; align-items: center; gap: 20px; padding: 25px 0; border-bottom: 1px solid var(--line); }
.recognition-list span { font: 500 10px var(--mono); color: var(--electric); }
.recognition-list article:nth-child(2) span { color: var(--orange); }
.recognition-list article:nth-child(3) span { color: var(--olive); }
.recognition-list h3 { font: 600 clamp(20px, 2.3vw, 32px)/1.1 var(--serif); letter-spacing: -.02em; }
.recognition-list p { margin: 0; max-width: 320px; text-align: right; font: 500 10px/1.5 var(--mono); color: var(--ash); }

/* ---------- Footer ---------- */
.site-footer { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 20px; padding: 34px var(--gutter); border-top: 1px solid var(--line); }
.site-footer p { margin: 0; font: 500 10px var(--mono); letter-spacing: .06em; color: var(--ash); text-align: center; }
.site-footer > a:last-child { justify-self: end; font: 600 10px var(--mono); letter-spacing: .1em; }
.site-footer > a:last-child:hover { color: var(--electric); }

/* ---------- Trang Dự án ---------- */
.page-hero { position: relative; padding: calc(var(--header-h) + 90px) var(--gutter) 70px; }
.page-hero h1 { margin-top: 26px; font: 600 clamp(52px, 8vw, 128px)/.9 var(--serif); letter-spacing: -.055em; max-width: 1100px; }
.page-hero h1 em { display: block; }
.page-hero .intro { margin: 30px 0 0; }
.page-count { position: absolute; right: var(--gutter); bottom: 70px; margin: 0; font: 600 10px var(--mono); letter-spacing: .12em; }
.page-count b { font: 600 56px/1 var(--serif); letter-spacing: -.04em; color: var(--orange); margin-right: 6px; }
.project-jump { display: grid; grid-template-columns: 1fr 1fr; border-block: 1px solid var(--line); position: sticky; top: var(--header-h); z-index: 10; background: var(--paper-glass); -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px); }
.project-jump a { display: flex; align-items: baseline; gap: 14px; padding: 18px var(--gutter); font: 600 clamp(20px, 2.2vw, 30px)/1 var(--serif); letter-spacing: -.02em; transition: background .2s; }
.project-jump a + a { border-left: 1px solid var(--line); }
.project-jump a:hover { background: #ffffff80; }
.project-jump span { font: 500 10px var(--mono); color: var(--electric); }
.project-jump a + a span { color: var(--orange); }
.project-group { padding: 90px var(--gutter); scroll-margin-top: calc(var(--header-h) + 60px); }
.project-group + .project-group { border-top: 1px solid var(--line); }
.group-heading { display: grid; grid-template-columns: 60px 1fr auto; align-items: end; gap: 0 20px; padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.group-heading > span { font: 500 10px var(--mono); color: var(--electric); align-self: start; padding-top: 10px; }
#creative .group-heading > span { color: var(--orange); }
.group-heading h2 { font: 600 clamp(48px, 6vw, 92px)/.9 var(--serif); letter-spacing: -.05em; }
.group-heading p { grid-column: 2; margin: 14px 0 0; font: 500 11px var(--mono); color: var(--ash); letter-spacing: .04em; }
.group-heading b { grid-row: 1 / span 2; grid-column: 3; font: 600 48px/1 var(--serif); color: var(--paper-deep); -webkit-text-stroke: 1px var(--ash); }
.project-group .product-grid { margin-top: 40px; }
.discipline { margin-top: 64px; scroll-margin-top: calc(var(--header-h) + 80px); }
.discipline header { display: flex; align-items: baseline; gap: 18px; flex-wrap: wrap; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.discipline h3 { font: 600 clamp(26px, 2.8vw, 40px)/1 var(--serif); letter-spacing: -.03em; }
.discipline header p { margin: 0; font: 500 10px var(--mono); color: var(--ash); }
.discipline header span { margin-left: auto; font: 500 10px var(--mono); color: var(--orange); }
.archive-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); gap: 32px 20px; margin-top: 28px; }
.archive-card { display: block; }
.archive-art { aspect-ratio: 4 / 3; overflow: hidden; background: var(--paper-deep); }
.archive-art img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
a.archive-card:hover .archive-art img { transform: scale(1.04); }
.archive-meta { display: grid; grid-template-columns: 30px 1fr auto; align-items: baseline; gap: 4px 10px; padding-top: 12px; }
.archive-meta span { font: 500 9px var(--mono); color: var(--electric); }
.archive-meta h3 { font: 600 17px/1.2 var(--serif); }
.archive-meta p { grid-column: 2; margin: 0; font: 500 9px var(--mono); color: var(--ash); }
.archive-meta i { grid-column: 3; grid-row: 1 / span 2; font: 600 9px var(--mono); font-style: normal; color: var(--electric); letter-spacing: .06em; }

/* ---------- Liên hệ ---------- */
.contact { display: grid; grid-template-columns: 1.1fr .9fr; gap: 8vw; padding-top: calc(var(--header-h) + 90px); }
.contact-heading .eyebrow { color: var(--signature); }
.contact-heading h1 { margin-top: 24px; font: 600 clamp(60px, 9vw, 140px)/.9 var(--serif); letter-spacing: -.055em; }
.contact-heading h1 em { display: block; color: var(--orange); font-weight: 500; }
.contact-heading .intro { margin: 28px 0 0; }
.contact-lines { margin-top: 44px; border-top: 1px solid var(--line); }
.contact-line { display: flex; justify-content: space-between; align-items: baseline; gap: 20px; padding: 18px 0; border-bottom: 1px solid var(--line); transition: padding .25s var(--ease), color .2s; }
.contact-line:hover { padding-left: 10px; color: var(--electric); }
.contact-line span { font: 600 9px var(--mono); letter-spacing: .12em; color: var(--ash); text-transform: uppercase; }
.contact-line i { font: 500 clamp(17px, 1.8vw, 24px) var(--serif); font-style: normal; text-align: right; overflow-wrap: anywhere; }
.contact-form { align-self: start; display: grid; gap: 22px; padding: 34px; background: var(--white); border: 1px solid var(--line); box-shadow: 8px 10px 0 var(--line); }
.contact-form label { display: grid; gap: 8px; font: 600 9px var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; padding: 12px 0; border: 0; border-bottom: 1px solid var(--line); background: transparent; color: var(--charcoal); font: 400 16px var(--sans); letter-spacing: 0; text-transform: none; border-radius: 0; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { outline: 0; border-color: var(--signature); }
.contact-form textarea { resize: vertical; }
.contact-form .button { justify-self: start; }
.form-note { margin: 0; font: 500 10px/1.5 var(--mono); color: var(--ash); }

/* ---------- 404 ---------- */
.notfound { min-height: 80vh; padding-top: calc(var(--header-h) + 100px); }
.notfound h1 { margin-top: 20px; font: 600 clamp(52px, 8vw, 120px)/.9 var(--serif); letter-spacing: -.05em; }
.notfound .arrow-link { margin: 32px 0 0; }

/* ---------- Responsive ---------- */
@media (width <= 980px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-nav, .header-cta { display: none; }
  .menu { display: block; }
  .hero { grid-template-columns: 1fr; padding-top: 130px; gap: 48px; }
  .hero-badge { top: 100px; left: auto; right: var(--gutter); }
  .hero-art { height: 70vh; min-height: 420px; }
  .hero-scroll-cue { position: static; grid-column: 1; }
  .about, .product, .cases, .craft, .process, .recognition { grid-template-columns: 1fr; gap: 34px; }
  .product .product-grid { grid-column: 1; margin-top: 10px; }
  .fields { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .step:nth-child(3) { border-right: 0; }
  .step:nth-child(3)::after { display: none; }
  .step:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
  .case summary { grid-template-columns: 40px minmax(0, 1fr) 44px; gap: 14px; }
  .chips, .case-thumb { display: none; }
  .case-panel { grid-template-columns: 1fr; gap: 32px; }
  .case-text { position: static; }
  .sticker, .burst { display: none; }
  .contact { grid-template-columns: 1fr; gap: 56px; }
  .page-count { position: static; margin-top: 30px; }
}
@media (width <= 680px) {
  :root { --header-h: 64px; }
  .section, .project-group { padding-top: 72px; padding-bottom: 72px; }
  .hero { min-height: 0; }
  .hero-art { height: 60vh; min-height: 360px; }
  .hero-scroll-cue { grid-template-columns: 1fr; }
  .hero-scroll-cue > span { justify-self: start; }
  .clients li { flex-basis: 120px; height: 80px; }
  .steps { grid-template-columns: 1fr 1fr; }
  .step { min-height: 200px; border-bottom: 1px solid var(--line); }
  .step:nth-child(odd) { border-right: 1px solid var(--line); }
  .step:nth-child(even) { border-right: 0; }
  .step::after { display: none; }
  .creative-note { grid-template-columns: 1fr; gap: 16px; padding: 28px 0; }
  .note-label { padding-left: var(--gutter); }
  .recognition-list article { grid-template-columns: 40px 1fr; }
  .recognition-list p { grid-column: 2; text-align: left; }
  .case-text dl > div { grid-template-columns: 1fr; gap: 4px; }
  .project-jump a { padding: 14px var(--gutter); }
  .group-heading { grid-template-columns: 1fr auto; }
  .group-heading > span { display: none; }
  .group-heading p { grid-column: 1; }
  .group-heading b { grid-column: 2; }
  .contact-form { padding: 24px; }
  .contact-line { flex-direction: column; gap: 6px; }
  .contact-line i { text-align: left; }
  .site-footer { grid-template-columns: 1fr auto; }
  .site-footer p { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .marquee { overflow-x: auto; }
  .marquee-track[aria-hidden="true"] { display: none; }
}

/* ---------- Tiếng Việt: dấu chồng cần khoảng cách chữ và dòng rộng hơn ---------- */
:lang(vi) :is(.brand-heading, .section-head h2, .lead, .page-hero h1, .contact-heading h1, .notfound h1, .group-heading h2) {
  letter-spacing: -.025em;
  line-height: 1.04;
}
:lang(vi) :is(.field-card h3, .case-name strong, .case-text h3, .step h3, .discipline h3, .recognition-list h3) {
  letter-spacing: -.015em;
  line-height: 1.1;
}
:lang(vi) .rotating { min-height: 1.1em; }

/* ---------- Sửa bố cục màn hình hẹp ---------- */
@media (width <= 980px) {
  .hero-badge { display: none; }
}
@media (width <= 680px) {
  .contact, .notfound { padding-top: calc(var(--header-h) + 48px); }
}
:is(.brand-heading > span, .section-head h2, .lead, .page-hero h1, .contact-heading h1, .group-heading h2) { text-wrap: balance; }

/* ---------- Product: trạng thái, bộ lọc ---------- */
.product-art { position: relative; }
.status { position: absolute; top: 14px; left: 14px; padding: 5px 10px; border-radius: 999px; background: var(--paper); font: 600 9px var(--mono); letter-spacing: .1em; text-transform: uppercase; box-shadow: 2px 3px 0 var(--line); }
.status::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 6px; border-radius: 50%; background: var(--ash); vertical-align: 1px; }
.status-live::before { background: var(--olive); }
.status-beta::before { background: var(--orange); }
.status-concept::before { background: var(--electric); }
.product-card[hidden] { display: none; }
.product .arrow-link { grid-column: 2; }
.filter-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; }
.chip { padding: 9px 14px; border: 1px solid var(--line); border-radius: 999px; background: transparent; color: var(--charcoal); font: 600 10px var(--mono); letter-spacing: .08em; cursor: pointer; transition: background .2s, color .2s; }
.chip:hover { border-color: var(--charcoal); }
.chip.is-on { background: var(--charcoal); color: var(--paper); border-color: var(--charcoal); }

/* ---------- Case study (/work/<slug>) ---------- */
.work-hero { padding: calc(var(--header-h) + 64px) var(--gutter) 56px; max-width: 1180px; }
.work-back { display: inline-block; margin-bottom: 40px; font: 600 10px var(--mono); letter-spacing: .08em; color: var(--ash); }
.work-back:hover { color: var(--electric); }
.work-hero h1 { margin-top: 22px; font: 600 clamp(52px, 8vw, 128px)/.92 var(--serif); letter-spacing: -.05em; text-wrap: balance; }
.work-hero .intro { margin: 28px 0 0; font-size: 18px; max-width: 720px; }
.work-meta { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 44px 0 0; border-top: 1px solid var(--line); }
.work-meta > div { padding: 18px 20px 0 0; }
.work-meta dt { font: 600 9px var(--mono); letter-spacing: .12em; color: var(--electric); }
.work-meta dd { margin: 8px 0 0; font: 500 17px/1.35 var(--serif); }
.work-actions { margin-top: 40px; }
.work-note { margin: 0; font: 500 11px var(--mono); color: var(--ash); }
.work-cover { margin: 0 var(--gutter); aspect-ratio: 16 / 9; overflow: hidden; background: var(--paper-deep); border: 1px solid var(--line); }
.work-cover img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.work-cover .palette-art b { font-size: clamp(90px, 14vw, 200px); left: 4%; bottom: 6%; }
.work-body { padding: 100px var(--gutter) 40px; max-width: 1180px; }
.work-block { display: grid; grid-template-columns: 60px minmax(0, 1fr) minmax(0, 2fr); gap: 0 32px; padding: 36px 0; border-top: 1px solid var(--line); }
.work-block > span { font: 500 10px var(--mono); color: var(--electric); padding-top: 8px; }
.work-block:nth-child(4n+2) > span { color: var(--orange); }
.work-block:nth-child(4n+3) > span { color: var(--olive); }
.work-block:nth-child(4n+4) > span { color: var(--signature); }
.work-block h2 { font: 600 clamp(28px, 3vw, 42px)/1.05 var(--serif); letter-spacing: -.03em; }
.work-block p { margin: 0 0 14px; font-size: 16px; line-height: 1.7; }
.work-results, .work-gallery { padding-top: 56px; border-top: 1px solid var(--line); margin-top: 20px; }
.work-results h2, .work-gallery h2 { font: 600 clamp(28px, 3vw, 42px)/1.05 var(--serif); letter-spacing: -.03em; }
.work-results .stats { margin-top: 24px; border-top: 0; }
.gallery-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-top: 28px; }
.gallery-grid img { width: 100%; border: 1px solid var(--line); background: var(--paper-deep); }
.gallery-grid img:first-child:nth-last-child(odd) { grid-column: 1 / -1; }
.work-next { display: grid; gap: 10px; margin: 80px var(--gutter) 0; padding: 48px 0 80px; border-top: 1px solid var(--line); }
.work-next span { font: 600 10px var(--mono); letter-spacing: .12em; color: var(--orange); }
.work-next strong { font: 600 clamp(40px, 6vw, 88px)/.95 var(--serif); letter-spacing: -.04em; transition: color .2s; }
.work-next p { margin: 0; max-width: 640px; color: var(--ash); }
.work-next:hover strong { color: var(--electric); }
:lang(vi) :is(.work-hero h1, .work-next strong) { letter-spacing: -.025em; line-height: 1.04; }
:lang(vi) :is(.work-block h2, .work-results h2, .work-gallery h2) { letter-spacing: -.015em; line-height: 1.12; }

@media (width <= 980px) {
  .product .arrow-link { grid-column: 1; }
  .work-meta { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 18px; }
  .work-block { grid-template-columns: 40px minmax(0, 1fr); }
  .work-block > div { grid-column: 2; margin-top: 16px; }
}
@media (width <= 680px) {
  .work-hero { padding-top: calc(var(--header-h) + 40px); }
  .work-back { margin-bottom: 28px; }
  .work-cover { aspect-ratio: 4 / 3; }
  .work-body { padding-top: 64px; }
  .gallery-grid { grid-template-columns: 1fr; }
}

/* ---------- Case study: vấn đề, câu hỏi thiết kế, quy trình ---------- */
.work-pains, .work-process { padding-top: 56px; margin-top: 20px; border-top: 1px solid var(--line); }
.work-pains h2, .work-process h2 { font: 600 clamp(28px, 3vw, 42px)/1.05 var(--serif); letter-spacing: -.03em; }
.work-pains ol { list-style: none; margin: 28px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.work-pains li { padding: 22px 22px 24px; background: var(--white); border: 1px solid var(--line); }
.work-pains li > span { font: 500 10px var(--mono); color: var(--signature); }
.work-pains h3 { margin-top: 12px; font: 600 21px/1.2 var(--serif); letter-spacing: -.01em; }
.work-pains p { margin: 10px 0 0; font-size: 14px; line-height: 1.6; color: var(--ash); }
.work-hmw { margin: 56px 0 0; padding: 40px 44px; background: var(--ink); color: var(--paper); }
.work-hmw span { font: 600 10px var(--mono); letter-spacing: .14em; color: var(--acid); text-transform: uppercase; }
.work-hmw p { margin: 16px 0 0; font: 500 italic clamp(24px, 2.8vw, 38px)/1.3 var(--serif); letter-spacing: -.01em; text-wrap: balance; }
.work-process ol { list-style: none; margin: 32px 0 0; padding: 0; }
.stage { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 32px; padding: 32px 0; border-top: 1px solid var(--line); }
.stage-head { display: flex; flex-direction: column; gap: 10px; }
.stage-head span { font: 500 10px var(--mono); color: var(--ash); }
.stage-head b { align-self: flex-start; padding: 6px 12px; border-radius: 999px; font: 600 11px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--white); }
.stage-empathize .stage-head b { background: var(--signature); }
.stage-define .stage-head b { background: var(--orange); }
.stage-ideate .stage-head b { background: var(--gold); }
.stage-prototype .stage-head b { background: var(--electric); }
.stage-test .stage-head b { background: var(--ink); }
.stage-body h3 { font: 600 clamp(24px, 2.4vw, 32px)/1.1 var(--serif); letter-spacing: -.02em; margin-bottom: 14px; }
.stage-body p { margin: 0 0 12px; font-size: 16px; line-height: 1.7; }
.tools { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin: 16px 0 0; padding: 0; }
.tools li { padding: 4px 10px; border: 1px solid var(--line); border-radius: 999px; background: var(--white); font: 500 11px var(--mono); }
:lang(vi) :is(.work-pains h2, .work-process h2, .work-pains h3, .stage-body h3) { letter-spacing: -.01em; line-height: 1.15; }

@media (width <= 980px) {
  .work-pains ol { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stage { grid-template-columns: 1fr; gap: 16px; }
  .stage-head { flex-direction: row; align-items: center; }
}
@media (width <= 680px) {
  .work-pains ol { grid-template-columns: 1fr; }
  .work-hmw { padding: 28px 24px; }
}