/* ============================================
   Gia Tuấn — Scandinavian editorial system
   ============================================ */

:root {
  /* warm linen palette */
  --bg: oklch(0.965 0.012 80);
  --bg-2: oklch(0.93 0.018 80);
  --bg-3: oklch(0.88 0.022 75);
  --paper: oklch(0.985 0.008 85);
  --ink: oklch(0.22 0.015 60);
  --ink-2: oklch(0.36 0.012 60);
  --ink-3: oklch(0.52 0.012 60);
  --rule: oklch(0.82 0.018 70);
  --rule-2: oklch(0.7 0.02 65);

  /* wood accent */
  --wood: oklch(0.62 0.07 55);
  --wood-dark: oklch(0.42 0.06 50);
  --moss: oklch(0.5 0.04 130);

  --serif: "Cormorant Garamond", "EB Garamond", Georgia, serif;
  --sans: "Manrope", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --maxw: 1440px;
  --gutter: clamp(20px, 4vw, 64px);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

/* type */
.display, h1.display {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.015em;
  font-size: clamp(48px, 9vw, 148px);
  margin: 0;
  text-wrap: balance;
}
h2.display {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(36px, 5.5vw, 84px);
  line-height: 1;
  letter-spacing: -0.012em;
  margin: 0;
  text-wrap: balance;
}
h3.display {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(26px, 3vw, 44px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0;
}
.serif-it { font-family: var(--serif); font-style: italic; font-weight: 400; }
.en { font-family: var(--serif); font-style: italic; color: var(--ink-3); font-weight: 400; }
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.lead {
  font-size: clamp(17px, 1.4vw, 22px);
  line-height: 1.45;
  color: var(--ink-2);
  max-width: 56ch;
  text-wrap: pretty;
}

/* container */
.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

/* ====== NAV ====== */
.nav {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in oklch, var(--bg) 90%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px var(--gutter);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.brand-mark {
  font-family: var(--serif);
  font-size: 24px;
  letter-spacing: -0.01em;
  line-height: 1;
}
.brand-sub {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.nav-links {
  display: flex;
  gap: 28px;
  justify-self: center;
  font-size: 13.5px;
}
.nav-links a {
  position: relative;
  padding: 8px 2px;
  color: var(--ink-2);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.is-current {
  color: var(--ink);
}
.nav-links a.is-current::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--ink);
}
.nav-right {
  justify-self: end;
  display: flex;
  gap: 18px;
  align-items: center;
  font-size: 13px;
}
.lang {
  display: inline-flex;
  border: 1px solid var(--rule-2);
  border-radius: 999px;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
}
.lang span {
  padding: 5px 10px;
  color: var(--ink-3);
}
.lang span.on {
  background: var(--ink);
  color: var(--bg);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--bg);
}
.nav-cta:hover { background: var(--wood-dark); }

/* ====== BUTTONS ====== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-size: 13.5px;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  transition: all 0.2s;
}
.btn-dark { background: var(--ink); color: var(--bg); }
.btn-dark:hover { background: var(--wood-dark); }
.btn-ghost { border-color: var(--ink); color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--bg); }
.btn .arrow { transition: transform 0.2s; }
.btn:hover .arrow { transform: translateX(3px); }

/* ====== HERO ====== */
.hero {
  padding: clamp(40px, 6vw, 80px) 0 0;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(24px, 5vw, 80px);
  align-items: end;
  padding-bottom: 40px;
}
.hero-text { padding-bottom: 20px; }
.hero h1 {
  margin-top: 24px;
}
.hero h1 .it { font-style: italic; }
.hero-meta {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  max-width: 540px;
}
.hero-meta dt {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 8px;
}
.hero-meta dd {
  margin: 0;
  font-family: var(--serif);
  font-size: 28px;
  letter-spacing: -0.01em;
}
.hero-img-wrap {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
}
.hero-img-wrap img {
  width: 100%; height: 100%; object-fit: cover;
}
.hero-caption {
  position: absolute;
  bottom: 18px;
  left: 18px;
  right: 18px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bg);
  display: flex;
  justify-content: space-between;
  mix-blend-mode: difference;
}

/* ticker / running rule */
.ticker {
  display: flex;
  gap: 40px;
  padding: 14px 0;
  border-block: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-2);
  overflow: hidden;
  white-space: nowrap;
}
.ticker span::after {
  content: "✦";
  margin-left: 40px;
  color: var(--wood);
}

/* sections */
.section {
  padding: clamp(60px, 9vw, 140px) 0;
}
.section-dark {
  background: var(--ink);
  color: var(--bg);
}
.section-dark .eyebrow, .section-dark .lead { color: oklch(0.78 0.012 60); }
.section-cream { background: var(--bg-2); }

.section-head {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(20px, 4vw, 60px);
  align-items: end;
  margin-bottom: clamp(40px, 6vw, 80px);
}
.section-head .eyebrow { margin-bottom: 16px; display: block; }

/* category grid */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--rule);
  border-block: 1px solid var(--rule);
}
.cat {
  background: var(--bg);
  padding: 28px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: background 0.2s;
}
.cat:hover { background: var(--bg-2); }
.cat-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
}
.cat-img {
  aspect-ratio: 4 / 5;
  background: var(--bg-3);
  overflow: hidden;
}
.cat-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s; }
.cat:hover .cat-img img { transform: scale(1.04); }
.cat-name {
  font-family: var(--serif);
  font-size: 24px;
  line-height: 1;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}
.cat-name .arrow { font-family: var(--sans); font-size: 18px; color: var(--ink-3); }
.cat-en { font-family: var(--serif); font-style: italic; font-size: 13px; color: var(--ink-3); }

/* products grid */
.products {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px 32px;
}
.product-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.product-card .pc-img {
  aspect-ratio: 4 / 5;
  background: var(--bg-2);
  overflow: hidden;
  position: relative;
}
.product-card .pc-img img {
  width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s;
}
.product-card:hover .pc-img img { transform: scale(1.03); }
.pc-tag {
  position: absolute;
  top: 14px; left: 14px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: var(--paper);
  padding: 5px 9px;
  border-radius: 999px;
}
.pc-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}
.pc-name {
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: -0.005em;
}
.pc-price {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-2);
  white-space: nowrap;
}
.pc-sub {
  font-family: var(--serif);
  font-style: italic;
  font-size: 13.5px;
  color: var(--ink-3);
}

/* split feature */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(20px, 5vw, 80px);
  align-items: center;
}
.split-img {
  aspect-ratio: 5 / 6;
  overflow: hidden;
  background: var(--bg-3);
}
.split-img img { width: 100%; height: 100%; object-fit: cover; }
.split-text h2 { margin-bottom: 24px; }
.split-text p { margin: 0 0 18px; max-width: 48ch; color: var(--ink-2); }
.split-list {
  margin-top: 32px;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--rule);
}
.split-list .row {
  display: grid;
  grid-template-columns: 60px 1fr auto;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.split-list .num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
}
.split-list .ttl {
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.1;
}
.split-list .ttl em { font-style: italic; color: var(--ink-3); font-size: 13.5px; margin-left: 8px; }
.split-list .desc {
  font-size: 13.5px;
  color: var(--ink-3);
  max-width: 28ch;
  text-align: right;
}

/* projects */
.proj-row {
  display: grid;
  grid-template-columns: 80px 1fr 1.4fr 200px 60px;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--rule);
  align-items: center;
  transition: padding 0.25s;
}
.proj-row:hover { padding-inline: 12px; background: color-mix(in oklch, var(--bg-2) 50%, transparent); }
.proj-row .pr-num { font-family: var(--mono); font-size: 11px; color: var(--ink-3); letter-spacing: 0.08em; }
.proj-row .pr-name { font-family: var(--serif); font-size: 28px; line-height: 1.05; }
.proj-row .pr-name em { font-style: italic; color: var(--ink-3); font-size: 14px; display: block; margin-top: 4px; }
.proj-row .pr-loc { font-size: 13.5px; color: var(--ink-2); }
.proj-row .pr-loc em { font-style: italic; color: var(--ink-3); display: block; font-size: 12px; margin-top: 2px; }
.proj-row .pr-year { font-family: var(--mono); font-size: 12px; color: var(--ink-2); letter-spacing: 0.06em; }
.proj-row .arrow { font-size: 20px; color: var(--ink-3); justify-self: end; }

/* CTA strip */
.cta-strip {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: end;
  padding-block: clamp(60px, 8vw, 120px);
}
.cta-strip h2 { margin: 0; }

/* footer */
.foot {
  background: var(--ink);
  color: var(--bg);
  padding: clamp(60px, 7vw, 100px) 0 30px;
}
.foot a { color: oklch(0.85 0.012 60); }
.foot a:hover { color: var(--bg); }
.foot-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 60px;
  border-bottom: 1px solid oklch(0.32 0.015 60);
}
.foot h4 {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: oklch(0.7 0.012 60);
  margin: 0 0 18px;
  font-weight: 500;
}
.foot ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; font-size: 13.5px; }
.foot .brand-mark { color: var(--bg); }
.foot .brand-sub { color: oklch(0.7 0.012 60); }
.foot-tag {
  font-family: var(--serif);
  font-size: 28px;
  line-height: 1.1;
  margin-top: 18px;
  max-width: 22ch;
  color: oklch(0.92 0.012 60);
}
.foot-tag em { font-style: italic; color: oklch(0.7 0.012 60); font-size: 16px; display: block; margin-top: 6px; }
.foot-bottom {
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: oklch(0.65 0.012 60);
}

/* page header */
.page-head {
  padding: clamp(40px, 6vw, 80px) 0 clamp(40px, 5vw, 60px);
  border-bottom: 1px solid var(--rule);
}
.page-head .eyebrow { display: block; margin-bottom: 20px; }
.page-head h1 { max-width: 14ch; }
.page-head .lead { margin-top: 28px; }

/* filters */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 28px 0;
  border-bottom: 1px solid var(--rule);
  align-items: center;
}
.filter-bar .lbl { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3); margin-right: 12px; }
.chip {
  padding: 8px 14px;
  border: 1px solid var(--rule-2);
  border-radius: 999px;
  font-size: 13px;
  color: var(--ink-2);
  background: transparent;
  transition: all 0.15s;
}
.chip:hover { border-color: var(--ink); color: var(--ink); }
.chip.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.filter-bar .sort { margin-left: auto; font-family: var(--mono); font-size: 12px; color: var(--ink-3); }

/* image placeholder treatment */
.ph {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 16px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  background: repeating-linear-gradient(135deg, var(--bg-2), var(--bg-2) 14px, var(--bg-3) 14px, var(--bg-3) 15px);
}

/* about specific */
.kpi {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  border-block: 1px solid var(--rule);
  padding: 36px 0;
}
.kpi .it {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.kpi .n {
  font-family: var(--serif);
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1;
  letter-spacing: -0.015em;
}
.kpi .l { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3); }
.kpi .e { font-family: var(--serif); font-style: italic; font-size: 13px; color: var(--ink-3); }

.timeline {
  display: grid;
  gap: 0;
}
.tl-row {
  display: grid;
  grid-template-columns: 140px 1fr 1.6fr;
  gap: 32px;
  padding: 28px 0;
  border-top: 1px solid var(--rule);
  align-items: baseline;
}
.tl-row:last-child { border-bottom: 1px solid var(--rule); }
.tl-yr { font-family: var(--mono); font-size: 13px; letter-spacing: 0.08em; color: var(--ink-2); }
.tl-ttl { font-family: var(--serif); font-size: 26px; line-height: 1.1; }
.tl-ttl em { display: block; font-style: italic; color: var(--ink-3); font-size: 13.5px; margin-top: 4px; }
.tl-desc { color: var(--ink-2); max-width: 46ch; }

/* product detail */
.pdp {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: clamp(24px, 4vw, 64px);
  padding: clamp(40px, 5vw, 64px) 0;
}
.pdp-gallery {
  display: grid;
  gap: 12px;
}
.pdp-main {
  aspect-ratio: 4 / 5;
  background: var(--bg-2);
  overflow: hidden;
}
.pdp-main img { width: 100%; height: 100%; object-fit: cover; }
.pdp-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.pdp-thumbs .t { aspect-ratio: 1; background: var(--bg-2); overflow: hidden; cursor: pointer; }
.pdp-thumbs .t.on { outline: 1px solid var(--ink); outline-offset: 4px; }
.pdp-thumbs .t img { width: 100%; height: 100%; object-fit: cover; }

.pdp-info { position: sticky; top: 90px; align-self: start; }
.pdp-info .eyebrow { display: block; margin-bottom: 16px; }
.pdp-info h1 { font-family: var(--serif); font-size: clamp(40px, 4vw, 56px); line-height: 1; margin: 0 0 6px; font-weight: 400; letter-spacing: -0.01em; }
.pdp-info .en { display: block; margin-bottom: 28px; }
.pdp-price { font-family: var(--serif); font-size: 30px; padding: 18px 0; border-block: 1px solid var(--rule); margin-bottom: 28px; display: flex; justify-content: space-between; align-items: baseline; }
.pdp-price small { font-family: var(--mono); font-size: 11px; color: var(--ink-3); letter-spacing: 0.1em; text-transform: uppercase; }
.swatches { display: flex; gap: 10px; margin: 14px 0 24px; }
.sw { width: 36px; height: 36px; border-radius: 50%; cursor: pointer; outline: 1px solid var(--rule); outline-offset: 3px; }
.sw.on { outline-color: var(--ink); }
.spec-table { width: 100%; border-collapse: collapse; margin: 28px 0; }
.spec-table th, .spec-table td { text-align: left; padding: 12px 0; border-bottom: 1px solid var(--rule); font-size: 13.5px; font-weight: 400; }
.spec-table th { font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); width: 40%; font-weight: 500; }
.pdp-actions { display: flex; gap: 12px; margin-top: 8px; }

/* contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 80px);
  padding-block: clamp(40px, 5vw, 80px);
}
.contact-form { display: grid; gap: 18px; }
.field { display: grid; gap: 6px; }
.field label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3); }
.field input, .field textarea, .field select {
  font: inherit;
  font-size: 14.5px;
  padding: 12px 0;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--rule-2);
  color: var(--ink);
  outline: none;
  font-family: var(--sans);
}
.field textarea { resize: vertical; min-height: 100px; }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--ink); }
.contact-side h3 { margin-bottom: 18px; }
.contact-block { padding: 24px 0; border-bottom: 1px solid var(--rule); }
.contact-block:first-of-type { border-top: 1px solid var(--rule); }
.contact-block .k { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 8px; }
.contact-block .v { font-family: var(--serif); font-size: 22px; line-height: 1.25; }
.contact-block .v em { font-style: italic; color: var(--ink-3); font-size: 14px; display: block; margin-top: 2px; }

.map-ph {
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(transparent 49%, var(--rule) 49%, var(--rule) 51%, transparent 51%) 0 0 / 40px 40px,
    linear-gradient(90deg, transparent 49%, var(--rule) 49%, var(--rule) 51%, transparent 51%) 0 0 / 40px 40px,
    var(--bg-2);
  position: relative;
  margin-top: 28px;
}
.map-ph::after {
  content: "";
  position: absolute;
  left: 38%; top: 48%;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--wood-dark);
  box-shadow: 0 0 0 6px color-mix(in oklch, var(--wood) 30%, transparent);
}
.map-ph .lbl {
  position: absolute;
  left: calc(38% + 28px); top: calc(48% - 10px);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--paper);
  padding: 6px 10px;
  border: 1px solid var(--rule-2);
}

/* responsive */
@media (max-width: 1000px) {
  .hero-grid, .split, .pdp, .contact-grid, .section-head, .cta-strip { grid-template-columns: 1fr; }
  .cta-strip { gap: 28px; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .products { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .nav-inner { grid-template-columns: auto 1fr; }
  .proj-row { grid-template-columns: 50px 1fr; }
  .proj-row .pr-loc, .proj-row .pr-year, .proj-row .arrow { display: none; }
  .kpi { grid-template-columns: repeat(2, 1fr); }
  .tl-row { grid-template-columns: 100px 1fr; }
  .tl-row .tl-desc { grid-column: 1 / -1; }
  .pdp-info { position: static; }
  .hero-meta { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .cat-grid, .products { grid-template-columns: 1fr; }
  .kpi { grid-template-columns: 1fr 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 32px; }
}