/* ==========================================================================
   Bauform — colour-block modernist furniture template · archesign.studio
   1. Tokens  2. Base  3. Header  4. Components  5. Pages  6. Footer  7. Responsive
   ========================================================================== */

/* 1. Tokens ---------------------------------------------------------------- */
:root {
  --paper: #f2efe6;
  --stone: #c9c5bb;
  --red: #d4322c;
  --yellow: #e8b730;
  --blue: #2a4d8f;
  --black: #161616;
  --chrome: #c7ccd2;
  --line: 8px;

  --font-display: "League Spartan", "Futura", "Century Gothic", sans-serif;
  --font-body: "Lexend", "Helvetica Neue", Arial, sans-serif;

  --gutter: clamp(16px, 3vw, 40px);
  --max: 1400px;
  --space: clamp(80px, 10vw, 150px);
}

/* 2. Base ------------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--black); font: 300 17px/1.6 var(--font-body); -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1em; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 800; margin: 0; line-height: .9; letter-spacing: -.02em; text-transform: uppercase; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
::selection { background: var(--yellow); color: var(--black); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--black); color: var(--paper); padding: 8px 12px; z-index: 100; }
.skip:focus { left: 8px; }
.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: var(--space) 0; }
.label { font: 500 12px var(--font-body); letter-spacing: .16em; text-transform: uppercase; margin: 0 0 12px; }
.num { font: 800 15px var(--font-display); display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--black); color: var(--paper); }

/* 3. Header ---------------------------------------------------------------- */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--paper); border-bottom: var(--line) solid var(--black); }
.header-row { display: flex; align-items: stretch; justify-content: space-between; height: 76px; padding-left: var(--gutter); }
.logo { display: inline-flex; align-items: center; gap: 12px; font: 800 30px var(--font-display); letter-spacing: -.02em; }
.logo small { font: 400 14px var(--font-body); letter-spacing: .04em; text-transform: none; margin-left: 2px; }
.shapes { display: inline-flex; gap: 3px; align-items: flex-end; }
.shapes i { width: 14px; height: 14px; background: var(--red); border-radius: 50%; }
.shapes i:nth-child(2) { background: var(--blue); border-radius: 0; }
.shapes i:nth-child(3) { width: 0; height: 0; background: none; border-left: 8px solid transparent; border-right: 8px solid transparent; border-bottom: 14px solid var(--yellow); }
.site-nav { display: flex; }
.site-nav a { display: flex; align-items: center; padding: 0 28px; border-left: var(--line) solid var(--black); font: 700 17px var(--font-display); text-transform: uppercase; letter-spacing: .02em; transition: background .15s, color .15s; }
.site-nav a:hover { background: var(--yellow); }
.site-nav a[aria-current="page"] { background: var(--black); color: var(--paper); }
.menu-btn { display: none; }

/* 4. Components ------------------------------------------------------------ */
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 16px 26px; border: 3px solid var(--black); background: var(--paper); color: var(--black); font: 700 16px var(--font-display); text-transform: uppercase; letter-spacing: .04em; cursor: pointer; transition: background .15s, color .15s; }
.btn:hover { background: var(--black); color: var(--paper); }
.btn--black { background: var(--black); color: var(--paper); }
.btn--black:hover { background: var(--paper); color: var(--black); }
.btn--red { background: var(--red); color: var(--paper); border-color: var(--red); }
.btn--red:hover { background: var(--black); border-color: var(--black); }
.js .reveal { opacity: 0; transform: scale(.97); transition: opacity .5s ease, transform .5s ease; }
.js .reveal.is-in { opacity: 1; transform: none; }

/* mondrian grid */
.mgrid { display: grid; gap: var(--line); background: var(--black); border-bottom: var(--line) solid var(--black); }
.mgrid > * { background: var(--paper); min-width: 0; }
.mgrid .red { background: var(--red); color: var(--paper); }
.mgrid .yellow { background: var(--yellow); }
.mgrid .blue { background: var(--blue); color: var(--paper); }
.mgrid .black { background: var(--black); color: var(--paper); }
.mgrid img { width: 100%; height: 100%; object-fit: cover; }

/* 5. Pages ----------------------------------------------------------------- */
/* hero grid */
.hero-grid { grid-template-columns: 1.3fr 1fr .55fr; grid-template-rows: auto auto; }
.hero-title { grid-row: span 2; padding: clamp(28px, 4vw, 60px) var(--gutter); display: flex; flex-direction: column; justify-content: space-between; gap: 40px; }
.hero-title h1 { font-size: clamp(56px, 8.4vw, 136px); }
.hero-title h1 span { display: block; }
.hero-title h1 span:nth-child(2) { color: var(--red); }
.hero-title h1 span:nth-child(3) { color: var(--blue); }
.hero-title p { max-width: 38ch; font-size: 18px; margin: 0; }
.hero-img { grid-row: span 2; }
.hero-img img { aspect-ratio: 1; }
.cell { padding: 24px; display: flex; flex-direction: column; justify-content: space-between; gap: 16px; }
.cell b { font: 800 clamp(40px, 4vw, 64px) var(--font-display); line-height: .9; }
.cell span { font-size: 14px; }
.cell.new h3 { font-size: 26px; }

/* collection strip */
.sec-head { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 30px; }
.sec-head h2 { font-size: clamp(42px, 6vw, 96px); }
.products { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: var(--line) solid var(--black); border-left: var(--line) solid var(--black); }
.products--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.product { background: var(--paper); display: flex; flex-direction: column; border-right: var(--line) solid var(--black); border-bottom: var(--line) solid var(--black); min-width: 0; }
.product img { width: 100%; aspect-ratio: 1; object-fit: cover; transition: filter .2s; }
.product:hover img { filter: saturate(1.25); }
.product .info { padding: 16px 18px 18px; display: flex; justify-content: space-between; align-items: end; gap: 10px; border-top: var(--line) solid var(--black); flex: 1; }
.product h3 { font-size: 24px; }
.product p { margin: 4px 0 0; font-size: 14px; }
.product .price { font: 800 20px var(--font-display); white-space: nowrap; }
.dots { display: flex; gap: 4px; margin-top: 8px; }
.dots i { width: 12px; height: 12px; border-radius: 50%; border: 1.5px solid var(--black); }
.d-red { background: var(--red); } .d-yellow { background: var(--yellow); } .d-blue { background: var(--blue); } .d-black { background: var(--black); } .d-chrome { background: var(--chrome); }

/* principles */
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 4vw, 60px); }
.principle .shape { width: 120px; height: 120px; margin-bottom: 26px; }
.principle:nth-child(1) .shape { background: var(--red); border-radius: 50%; }
.principle:nth-child(2) .shape { background: var(--blue); }
.principle:nth-child(3) .shape { width: 0; height: 0; border-left: 64px solid transparent; border-right: 64px solid transparent; border-bottom: 120px solid var(--yellow); }
.principle h3 { font-size: 34px; margin-bottom: 12px; }

/* configurator (CSS only, :has) */
.config { --frame: var(--chrome); --seat: var(--red); --bg: var(--yellow); display: grid; grid-template-columns: 1.2fr 1fr; border: var(--line) solid var(--black); background: var(--black); gap: var(--line); }
.config .preview { background: var(--bg); display: grid; place-items: center; padding: 30px; transition: background .3s; }
.config .preview svg { width: min(100%, 420px); height: auto; }
.config .preview .frame { fill: none; stroke: var(--frame); stroke-width: 10; stroke-linecap: round; stroke-linejoin: round; transition: stroke .3s; }
.config .preview .frame-shade { fill: none; stroke: #000; opacity: .25; stroke-width: 10; stroke-linecap: round; stroke-linejoin: round; transform: translate(3px, 3px); }
.config .preview .seat { fill: var(--seat); stroke: var(--black); stroke-width: 3; transition: fill .3s; }
.config .preview .floor { fill: var(--black); opacity: .18; }
.config .opts { background: var(--paper); padding: clamp(22px, 3vw, 40px); display: flex; flex-direction: column; gap: 26px; }
.config h3 { font-size: clamp(32px, 3.4vw, 50px); }
.config fieldset { border: 0; padding: 0; margin: 0; }
.config legend { font: 500 12px var(--font-body); letter-spacing: .16em; text-transform: uppercase; margin-bottom: 12px; }
.config .swatch { display: inline-block; position: relative; margin: 0 8px 8px 0; }
.config .swatch input { position: absolute; opacity: 0; }
.config .swatch span { display: inline-flex; align-items: center; gap: 10px; padding: 8px 14px 8px 8px; border: 3px solid var(--black); font: 700 14px var(--font-display); text-transform: uppercase; cursor: pointer; background: var(--paper); }
.config .swatch span::before { content: ""; width: 22px; height: 22px; border-radius: 50%; border: 2px solid var(--black); background: var(--c); }
.config .swatch input:checked + span { background: var(--black); color: var(--paper); }
.config .swatch input:focus-visible + span { outline: 3px solid var(--blue); outline-offset: 2px; }
.config:has(#fr-black:checked) { --frame: var(--black); }
.config:has(#fr-red:checked) { --frame: var(--red); }
.config:has(#st-blue:checked) { --seat: var(--blue); --bg: var(--red); }
.config:has(#st-yellow:checked) { --seat: var(--yellow); --bg: var(--blue); }
.config:has(#st-black:checked) { --seat: var(--black); --bg: var(--paper); }
.config .total { font: 800 36px var(--font-display); }

/* page head */
.page-head { display: grid; grid-template-columns: 1fr auto; border-bottom: var(--line) solid var(--black); }
.page-head .t { padding: clamp(40px, 6vw, 90px) var(--gutter); }
.page-head h1 { font-size: clamp(56px, 9vw, 150px); }
.page-head p { max-width: 50ch; font-size: 18px; margin: 22px 0 0; }
.page-head .blk { width: clamp(80px, 16vw, 260px); border-left: var(--line) solid var(--black); display: grid; grid-template-rows: 2fr 1fr 1fr; }
.page-head .blk i:nth-child(1) { background: var(--red); }
.page-head .blk i:nth-child(2) { background: var(--yellow); border-top: var(--line) solid var(--black); }
.page-head .blk i:nth-child(3) { background: var(--blue); border-top: var(--line) solid var(--black); }
.filters { display: flex; flex-wrap: wrap; gap: 0; border: 3px solid var(--black); width: fit-content; max-width: 100%; margin-bottom: 30px; }
.filters button { font: 700 15px var(--font-display); text-transform: uppercase; background: var(--paper); color: var(--black); border: 0; border-right: 3px solid var(--black); padding: 12px 18px; cursor: pointer; }
.filters button:last-child { border-right: 0; }
.filters button[aria-pressed="true"] { background: var(--red); color: var(--paper); }

/* product page */
.pdp { grid-template-columns: 1.2fr 1fr; }
.pdp .info-cell { padding: clamp(24px, 4vw, 54px); display: flex; flex-direction: column; gap: 18px; }
.pdp h1 { font-size: clamp(54px, 6.4vw, 104px); }
.pdp .price { font: 800 34px var(--font-display); }
.spec { margin: 0; border-top: 3px solid var(--black); }
.spec div { display: grid; grid-template-columns: 140px 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--stone); font-size: 15px; }
.spec dt { font-weight: 500; }
.spec dd { margin: 0; }
.parts { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 5vw, 80px); align-items: center; }
.parts img { border: var(--line) solid var(--black); background: var(--paper); }
.parts ol { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; }
.parts li { display: grid; grid-template-columns: 34px 1fr; gap: 16px; align-items: start; }
.parts li b { font: 700 20px var(--font-display); text-transform: uppercase; display: block; }

/* studio */
.manifesto { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--line); background: var(--black); border: var(--line) solid var(--black); }
.manifesto div { background: var(--paper); padding: clamp(24px, 4vw, 50px); }
.manifesto div:nth-child(2) { background: var(--yellow); }
.manifesto div:nth-child(3) { background: var(--blue); color: var(--paper); }
.manifesto div:nth-child(4) { background: var(--red); color: var(--paper); }
.manifesto b { display: block; font: 800 clamp(30px, 3.4vw, 52px)/.95 var(--font-display); text-transform: uppercase; margin-bottom: 14px; }
.team { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--line); background: var(--black); border: var(--line) solid var(--black); }
.team div { background: var(--paper); }
.team img { width: 100%; aspect-ratio: 1; object-fit: cover; border-bottom: var(--line) solid var(--black); }
.team h3 { font-size: 26px; padding: 16px 18px 2px; }
.team p { padding: 0 18px 18px; margin: 0; font-size: 15px; }

/* contract */
.ral { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: var(--line); background: var(--black); border: var(--line) solid var(--black); }
.ral div { aspect-ratio: 1; padding: 14px; display: flex; flex-direction: column; justify-content: flex-end; font-size: 13px; font-weight: 500; }
.ral b { font: 800 22px var(--font-display); }
.offers { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--line); background: var(--black); border: var(--line) solid var(--black); }
.offers div { background: var(--paper); padding: 30px; }
.offers div:nth-child(2) { background: var(--yellow); }
.offers h3 { font-size: 30px; margin: 18px 0 10px; }
.faq { max-width: 920px; border: 3px solid var(--black); }
.faq details { border-bottom: 3px solid var(--black); }
.faq details:last-child { border-bottom: 0; }
.faq summary { display: block; position: relative; padding: 18px 60px 18px 20px; cursor: pointer; list-style: none; font: 700 19px var(--font-display); text-transform: uppercase; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; position: absolute; right: 20px; top: 50%; width: 18px; height: 18px; margin-top: -9px; background: var(--red); border-radius: 50%; transition: border-radius .2s, background .2s; }
.faq details[open] summary::after { border-radius: 0; background: var(--blue); }
.faq details p { margin: 0; padding: 0 20px 20px; }

/* contact */
.contact { display: grid; grid-template-columns: 1.5fr 1fr; gap: var(--line); background: var(--black); border: var(--line) solid var(--black); }
.contact > * { background: var(--paper); min-width: 0; }
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; padding: clamp(20px, 3vw, 40px); }
.form > *, .field { min-width: 0; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field--full, .actions, .form-note { grid-column: 1 / -1; }
.field label { font: 500 12px var(--font-body); letter-spacing: .14em; text-transform: uppercase; }
.field input, .field select, .field textarea { font: 400 16px var(--font-body); color: var(--black); background: #fff; border: 3px solid var(--black); border-radius: 0; padding: 12px 14px; min-width: 0; max-width: 100%; }
.field textarea { min-height: 130px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; background: #fff8dc; }
.form-note { margin: 0; padding: 14px 16px; background: var(--yellow); border: 3px solid var(--black); }
.showroom { background: var(--blue) !important; color: var(--paper); padding: clamp(20px, 3vw, 40px); }
.showroom h3 { font-size: 34px; margin-bottom: 14px; }
.showroom ul { list-style: none; padding: 0; margin: 18px 0 0; }
.showroom li { padding: 10px 0; border-top: 2px solid rgba(242, 239, 230, .3); }

/* 6. Footer ---------------------------------------------------------------- */
.site-footer { margin-top: var(--space); border-top: var(--line) solid var(--black); }
.f-blocks { display: grid; grid-template-columns: 1.4fr 1fr .8fr .8fr; gap: var(--line); background: var(--black); border-bottom: var(--line) solid var(--black); }
.f-blocks > div { padding: clamp(24px, 3vw, 44px); min-width: 0; }
.b-red { background: var(--red); color: var(--paper); }
.b-red h2 { font-size: clamp(46px, 5.4vw, 88px); }
.b-paper { background: var(--paper); }
.b-blue { background: var(--blue); color: var(--paper); }
.b-yellow { background: var(--yellow); display: flex; align-items: flex-end; }
.f-blocks a:hover { text-decoration: underline; }
.f-base { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 16px var(--gutter); margin: 0; font-size: 13px; }

/* 7. Responsive ------------------------------------------------------------ */
@media (max-width: 1100px) {
  .hero-grid { grid-template-columns: 1fr 1fr; }
  .hero-title { grid-column: 1 / -1; grid-row: auto; }
  .hero-img { grid-row: span 2; }
  .products { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ral { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .f-blocks { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  body { font-size: 16px; }
  .header-row { height: 64px; }
  .logo { font-size: 26px; }
  .menu-btn { display: flex; align-items: center; position: relative; z-index: 60; background: var(--red); color: var(--paper); border: 0; border-left: var(--line) solid var(--black); padding: 0 22px; font: 700 16px var(--font-display); text-transform: uppercase; cursor: pointer; }
  .menu-open .menu-btn { background: var(--blue); }
  .site-nav { position: fixed; inset: 0; z-index: 55; flex-direction: column; background: var(--black); gap: var(--line); opacity: 0; visibility: hidden; transition: opacity .2s, visibility .2s; }
  .site-nav a { flex: 1; border: 0; padding: 0 var(--gutter); font-size: 44px; background: var(--paper); }
  .site-nav a:nth-child(1) { background: var(--red); color: var(--paper); }
  .site-nav a:nth-child(2) { background: var(--yellow); }
  .site-nav a:nth-child(3) { background: var(--blue); color: var(--paper); }
  .site-nav a[aria-current="page"] { text-decoration: underline; text-decoration-thickness: 4px; text-underline-offset: 8px; }
  .menu-open .site-nav { opacity: 1; visibility: visible; }
  .menu-open { overflow: hidden; }
  .config, .pdp, .parts, .contact, .form { grid-template-columns: 1fr; }
  .principles, .offers { grid-template-columns: 1fr; }
  .manifesto, .team { grid-template-columns: 1fr; }
  .page-head .blk { width: 60px; }
  .sec-head { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 560px) {
  .hero-grid { grid-template-columns: 1fr 1fr; }
  .hero-img { grid-column: 1 / -1; grid-row: auto; }
  .hero-title h1 { font-size: 56px; }
  .products { grid-template-columns: 1fr; }
  .ral { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .f-blocks { grid-template-columns: 1fr; }
  .filters { width: 100%; }
  .filters button { flex: 1 1 auto; padding: 10px 8px; font-size: 13px; }
  .page-head h1 { font-size: 50px; }
  .spec div { grid-template-columns: 110px 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}