/* ============================================================
   Phuong Nguyen — portfolio
   Identity: "The Fold"
   Palette   yellow #F2C94C · black #1F1F1F · off-white #F8F6F2 · sage #6F8A74
   Type      Space Grotesk (stands in for Neue Montreal) + Inter
   ============================================================ */

:root{
  --yel:#F2C94C;
  --blk:#1F1F1F;
  --bg:#F8F6F2;
  --sage:#6F8A74;
  --mute:#767268;
  --line:#E4DFD5;
  --max:1120px;
  --ease:cubic-bezier(.2,.8,.2,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--blk);
  font:16px/1.65 Inter,-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}

.wrap{max-width:var(--max);margin:0 auto;padding:0 32px}

/* ---------- type ---------- */
h1,h2,h3,.display{font-family:"Space Grotesk",Inter,sans-serif;font-weight:700;letter-spacing:-.02em;margin:0}
h1{font-size:clamp(38px,6.2vw,74px);line-height:1.04}
h2{font-size:clamp(26px,3.4vw,40px);line-height:1.12}
h3{font-size:20px;line-height:1.25}
p{margin:0 0 1.15em}
.lede{font-size:clamp(17px,2vw,21px);line-height:1.6;color:#3A3833;max-width:62ch}
.eyebrow{
  font-size:11px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--mute);font-weight:600;margin:0 0 14px;
}
.muted{color:var(--mute)}
.measure{max-width:66ch}

/* ---------- fold motif ---------- */
.fold-rule{position:relative;border-top:1px solid var(--line);margin:0}
.fold-rule::after{
  content:"";position:absolute;left:0;top:-2px;width:72px;border-top:4px solid var(--yel);
}
.fold-corner{position:relative;overflow:hidden}
.fold-corner::after{
  content:"";position:absolute;top:0;right:0;width:52px;height:52px;
  background:linear-gradient(225deg,var(--bg) 0 50%,rgba(31,31,31,.16) 50% 100%);
  transition:width .35s var(--ease),height .35s var(--ease);
}
.fold-corner:hover::after{width:76px;height:76px}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:40;background:rgba(248,246,242,.9);
  backdrop-filter:saturate(160%) blur(8px);border-bottom:1px solid var(--line);
}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand img{height:30px;width:auto}
.brand span{
  font-family:"Space Grotesk",sans-serif;font-weight:700;
  letter-spacing:.14em;font-size:12px;text-transform:uppercase;
}
.nav-links{display:flex;gap:30px}
.nav-links a{
  text-decoration:none;font-size:13px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--mute);padding-bottom:3px;border-bottom:2px solid transparent;transition:.2s;
}
.nav-links a:hover,.nav-links a[aria-current]{color:var(--blk);border-color:var(--yel)}

/* ---------- animated mark ---------- */
.mark{position:relative;width:var(--mw,168px);aspect-ratio:294/315}
.mark img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
@keyframes foldL{
  from{clip-path:inset(0 100% 0 0);transform:translateX(-14px) rotate(-3deg);opacity:0}
  to  {clip-path:inset(0 0 0 0);transform:none;opacity:1}
}
@keyframes foldR{
  from{clip-path:inset(0 0 0 100%);transform:translate(16px,-10px) rotate(4deg);opacity:0}
  to  {clip-path:inset(0 0 0 0);transform:none;opacity:1}
}
.mark .ply{animation:foldL .46s var(--ease) both}
.mark .plb{animation:foldR .46s var(--ease) .2s both}

/* ---------- hero ---------- */
.hero{padding:88px 0 72px}
.hero-grid{display:grid;grid-template-columns:auto 1fr;gap:48px;align-items:center}
.hero h1{margin:.18em 0 .28em}
.hero .lede{margin-bottom:0}

/* ---------- sections ---------- */
section{padding:74px 0}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:24px;margin-bottom:34px}

/* ---------- work cards ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:28px}
.card{
  background:#fff;border:1px solid var(--line);text-decoration:none;color:inherit;
  display:flex;flex-direction:column;transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(31,31,31,.09)}
.card-fig{
  background:var(--bg);display:flex;align-items:center;justify-content:center;
  padding:54px 20px;border-bottom:1px solid var(--line);
}
.card-fig img{width:132px}
.card-body{padding:24px 26px 28px}
.card-body h3{margin-bottom:6px}
.card-meta{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--mute)}
.card-body p{margin:10px 0 0;font-size:14.5px;color:#46443E}
.card.soon{border-style:dashed;background:transparent;pointer-events:none}
.card.soon .card-fig{background:transparent}
.dots{display:flex;gap:9px}
.dots i{width:13px;height:13px;border-radius:50%;background:var(--line);display:block}

/* ---------- case study ---------- */
.case-hero{padding:80px 0 56px}
.meta-row{display:flex;flex-wrap:wrap;gap:44px;margin-top:36px}
.meta-row div{min-width:120px}
.meta-row dt{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--mute);margin-bottom:6px}
.meta-row dd{margin:0;font-size:15px;font-weight:500}

.stage{
  background:#fff;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;padding:74px 24px;
}
.stage.dark{background:var(--blk);border-color:var(--blk)}
.stage.yellow{background:var(--yel);border-color:var(--yel)}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.trio{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cap{font-size:12.5px;color:var(--mute);margin-top:12px;letter-spacing:.02em}

.step{display:grid;grid-template-columns:56px 1fr;gap:22px;padding:26px 0;border-top:1px solid var(--line)}
.step-n{
  font-family:"Space Grotesk",sans-serif;font-weight:700;font-size:15px;
  color:var(--yel);padding-top:2px;
}
.step h3{margin-bottom:8px}
.step p{margin:0;color:#46443E;max-width:62ch}

.swatches{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:18px}
.sw i{display:block;height:92px;border:1px solid rgba(31,31,31,.09)}
.sw b{display:block;font-size:13px;margin-top:12px;font-weight:600}
.sw span{font-size:12.5px;color:var(--mute)}

.pull{
  border-left:4px solid var(--yel);padding:6px 0 6px 26px;margin:38px 0;
  font-family:"Space Grotesk",sans-serif;font-size:clamp(19px,2.4vw,26px);
  line-height:1.4;letter-spacing:-.01em;max-width:56ch;
}

/* ---------- about / contact ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.list{list-style:none;margin:0;padding:0}
.list li{padding:11px 0;border-top:1px solid var(--line);font-size:15px;display:flex;justify-content:space-between;gap:20px}
.list li span{color:var(--mute);font-size:13.5px;text-align:right}

.cta{background:var(--blk);color:#fff;padding:76px 0;margin-top:20px}
.cta h2{color:#fff;margin-bottom:14px}
.cta p{color:#C9C5BC;max-width:52ch}
.btn{
  display:inline-block;margin-top:22px;background:var(--yel);color:var(--blk);
  text-decoration:none;font-weight:600;font-size:14.5px;padding:15px 30px;
  transition:transform .25s var(--ease);
}
.btn:hover{transform:translateY(-2px)}

footer{padding:40px 0 56px;font-size:13.5px;color:var(--mute)}
.foot-in{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
footer a{text-decoration:none}
footer a:hover{color:var(--blk)}

/* ---------- responsive ---------- */
@media(max-width:840px){
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .two-col,.trio,.split{grid-template-columns:1fr}
  .nav-links{gap:18px}
  .nav-links a{font-size:12px}
  .wrap{padding:0 22px}
  section{padding:56px 0}
}

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