/* ==========================================================================
   Parti — Bauhaus architecture template · archesign.studio
   1. Tokens  2. Base  3. Header  4. Components  5. Pages  6. Footer  7. Responsive
   ========================================================================== */

/* 1. Tokens ---------------------------------------------------------------- */
:root {
  --paper: #f2efe6;
  --red: #e63a2e;
  --yellow: #f4c430;
  --blue: #1d4fd8;
  --black: #111111;
  --grey: #6f6b62;

  --font: "Jost", "Futura", "Century Gothic", Arial, sans-serif;
  --gutter: clamp(16px, 2.6vw, 36px);
  --max: 1400px;
  --space: clamp(72px, 10vw, 140px);
  --ease: cubic-bezier(.3, .7, .2, 1);
}

/* 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: 400 18px/1.6 var(--font); -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 { margin: 0; font-weight: 700; line-height: .95; letter-spacing: -0.02em; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
::selection { background: var(--yellow); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--black); color: var(--paper); padding: 8px 12px; z-index: 100; }
.skip:focus { left: 8px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: var(--space) 0; }
.lbl { display: inline-flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; margin: 0 0 20px; }
.lbl::before { content: ""; width: 14px; height: 14px; border-radius: 50%; background: var(--red); }
.lbl--sq::before { border-radius: 0; background: var(--blue); }
.lbl--tri::before { border-radius: 0; background: var(--yellow); clip-path: polygon(50% 0, 100% 100%, 0 100%); }
.up { text-transform: uppercase; letter-spacing: .06em; }
.grey { color: var(--grey); }

/* 3. Header ---------------------------------------------------------------- */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--paper); border-bottom: 3px solid var(--black); }
.header-row { display: flex; align-items: center; justify-content: space-between; height: 80px; }
.logo { display: inline-flex; align-items: center; gap: 14px; font-weight: 700; font-size: 22px; letter-spacing: -0.01em; }
.shapes { display: inline-flex; align-items: end; gap: 3px; }
.shapes i { display: block; width: 18px; height: 18px; }
.shapes .c { border-radius: 50%; background: var(--red); }
.shapes .s { background: var(--blue); }
.shapes .t { background: var(--yellow); clip-path: polygon(50% 0, 100% 100%, 0 100%); }
.site-nav { display: flex; gap: 0; height: 100%; }
.site-nav a { display: flex; align-items: center; padding: 0 22px; font-weight: 500; font-size: 16px; text-transform: uppercase; letter-spacing: .08em; position: relative; transition: color .2s; }
.site-nav a::before { content: ""; position: absolute; left: 0; right: 0; bottom: -3px; height: 0; transition: height .25s var(--ease); z-index: -1; }
.n-red::before { background: var(--red); } .n-yellow::before { background: var(--yellow); } .n-blue::before { background: var(--blue); } .n-black::before { background: var(--black); }
.site-nav a:hover::before, .site-nav a[aria-current="page"]::before { height: calc(100% + 3px); }
.site-nav .n-red:hover, .site-nav .n-blue:hover, .site-nav .n-black:hover, .n-red[aria-current="page"], .n-blue[aria-current="page"], .n-black[aria-current="page"] { color: #fff; }
.site-nav a { z-index: 0; }
.menu-btn { display: none; }

/* 4. Components ------------------------------------------------------------ */
.btn { display: inline-flex; align-items: center; gap: 12px; padding: 16px 28px; background: var(--black); color: var(--paper); font: 500 16px var(--font); text-transform: uppercase; letter-spacing: .1em; border: 0; cursor: pointer; transition: background .2s, color .2s; }
.btn:hover { background: var(--red); }
.btn--outline { background: transparent; color: var(--black); box-shadow: inset 0 0 0 3px var(--black); }
.btn--outline:hover { background: var(--yellow); color: var(--black); }
.pic { background: #e8e3d6; overflow: hidden; }
.pic img { width: 100%; aspect-ratio: var(--ratio, 4 / 3); object-fit: cover; transition: transform .8s var(--ease); }
a:hover .pic img { transform: scale(1.04); }
.js .reveal { opacity: 0; transform: scale(.96); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal.is-in { opacity: 1; transform: none; }

/* 5. Pages ----------------------------------------------------------------- */
/* hero: colour-block grid */
.hero { display: grid; grid-template-columns: repeat(4, 1fr); grid-template-rows: auto auto; border-bottom: 3px solid var(--black); }
.hero-title { grid-column: span 3; border-right: 3px solid var(--black); padding: clamp(28px, 4vw, 64px) var(--gutter); display: flex; flex-direction: column; justify-content: space-between; gap: 32px; }
.hero-title h1 { font-size: clamp(56px, 9.4vw, 160px); letter-spacing: -0.04em; line-height: .88; }
.hero-title h1 span { color: var(--red); }
.hero-title p { font-size: clamp(18px, 1.5vw, 22px); max-width: 46ch; margin: 0; }
.hero-art { grid-row: span 2; border-right: 0; }
.hero-art img { width: 100%; height: 100%; object-fit: cover; }
.block { border-right: 3px solid var(--black); padding: 26px var(--gutter); display: flex; flex-direction: column; justify-content: space-between; min-height: 200px; border-top: 3px solid var(--black); }
.block b { font-size: clamp(44px, 4.6vw, 72px); line-height: 1; letter-spacing: -0.03em; }
.b-red { background: var(--red); color: #fff; }
.b-yellow { background: var(--yellow); }
.b-blue { background: var(--blue); color: #fff; }
.b-black { background: var(--black); color: var(--paper); }

/* manifesto row */
.manifesto { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gutter); }
.m-item h3 { font-size: clamp(28px, 2.8vw, 40px); margin: 22px 0 12px; }
.m-item p { color: var(--grey); }
.shape { width: 64px; height: 64px; }
.shape--c { border-radius: 50%; background: var(--red); }
.shape--s { background: var(--blue); }
.shape--t { background: var(--yellow); clip-path: polygon(50% 0, 100% 100%, 0 100%); }

/* project grid */
.head { display: flex; justify-content: space-between; align-items: end; gap: 24px; flex-wrap: wrap; margin-bottom: 48px; }
.head h2 { font-size: clamp(44px, 6vw, 96px); letter-spacing: -0.035em; }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--gutter); }
.tile { display: block; border: 3px solid var(--black); background: #fff; transition: transform .25s var(--ease), box-shadow .25s; }
.tile:hover { transform: translate(-4px, -4px); box-shadow: 8px 8px 0 var(--black); }
.tile .pic { border-bottom: 3px solid var(--black); }
.tile-body { padding: 18px 20px 22px; display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; align-items: start; }
.tile h3 { font-size: 26px; letter-spacing: -0.015em; }
.tile .dot { width: 22px; height: 22px; border-radius: 50%; }
.tile .meta { grid-column: 1 / -1; font-size: 14px; color: var(--grey); text-transform: uppercase; letter-spacing: .08em; }
.dot.red { background: var(--red); } .dot.yellow { background: var(--yellow); border-radius: 0; } .dot.blue { background: var(--blue); clip-path: polygon(50% 0, 100% 100%, 0 100%); border-radius: 0; }

/* page head */
.page-head { display: grid; grid-template-columns: 3fr 1fr; border-bottom: 3px solid var(--black); }
.page-head > div:first-child { padding: clamp(40px, 6vw, 96px) var(--gutter) 32px; border-right: 3px solid var(--black); }
.page-head h1 { font-size: clamp(64px, 11vw, 190px); letter-spacing: -0.045em; line-height: .86; }
.page-head p { max-width: 52ch; margin: 22px 0 0; font-size: 19px; }
.page-head .swatch { display: grid; grid-template-rows: 1fr 1fr 1fr; }
.page-head .swatch i:nth-child(1) { background: var(--red); }
.page-head .swatch i:nth-child(2) { background: var(--yellow); }
.page-head .swatch i:nth-child(3) { background: var(--blue); }

.filters { display: flex; flex-wrap: wrap; gap: 10px; margin: 48px 0; }
.filters button { font: 500 15px var(--font); text-transform: uppercase; letter-spacing: .08em; padding: 12px 20px; border: 3px solid var(--black); background: var(--paper); cursor: pointer; display: inline-flex; gap: 10px; align-items: center; color: var(--black); }
.filters button[aria-pressed="true"] { background: var(--black); color: var(--paper); }
.filters button i { width: 12px; height: 12px; display: inline-block; }

/* project */
.case-top { display: grid; grid-template-columns: 1fr 1fr; border-bottom: 3px solid var(--black); }
.case-top .pic { border-right: 3px solid var(--black); }
.case-top .pic img { height: 100%; aspect-ratio: auto; min-height: 420px; }
.facts { margin: 0; display: grid; grid-template-columns: 1fr 1fr; }
.facts div { padding: 22px var(--gutter); border-bottom: 3px solid var(--black); }
.facts div:nth-child(odd) { border-right: 3px solid var(--black); }
.facts dt { font-size: 13px; text-transform: uppercase; letter-spacing: .12em; color: var(--grey); }
.facts dd { margin: 6px 0 0; font-size: 26px; font-weight: 500; }
.facts .wide { grid-column: 1 / -1; border-right: 0 !important; background: var(--yellow); }
.diagrams { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gutter); }
.diagram figcaption { margin-top: 12px; font-weight: 500; text-transform: uppercase; letter-spacing: .08em; font-size: 14px; }
.diagram .pic { border: 3px solid var(--black); }
.text-2 { display: grid; grid-template-columns: 1fr 1fr; gap: calc(var(--gutter) * 2); font-size: 19px; }
.text-2 h2 { grid-column: 1 / -1; font-size: clamp(36px, 4.6vw, 70px); letter-spacing: -0.03em; }

/* team */
.team { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gutter); }
.person .pic { --ratio: 1 / 1; border: 3px solid var(--black); }
.person:nth-child(1) .pic { border-radius: 50%; }
.person:nth-child(3) .pic { clip-path: polygon(50% 0, 100% 100%, 0 100%); border: 0; }
.person h3 { font-size: 28px; margin-top: 18px; }

/* services tiles */
.svc-grid { display: grid; grid-template-columns: repeat(2, 1fr); border: 3px solid var(--black); }
.svc { padding: clamp(28px, 4vw, 56px); min-height: 320px; display: flex; flex-direction: column; justify-content: space-between; gap: 22px; }
.svc:nth-child(1) { border-right: 3px solid var(--black); border-bottom: 3px solid var(--black); }
.svc:nth-child(2) { border-bottom: 3px solid var(--black); }
.svc:nth-child(3) { border-right: 3px solid var(--black); }
.svc h3 { font-size: clamp(36px, 4vw, 60px); letter-spacing: -0.03em; }
.svc ul { margin: 0; padding-left: 20px; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gutter); counter-reset: s; }
.steps li { counter-increment: s; }
.steps li::before { content: counter(s); display: grid; place-items: center; width: 64px; height: 64px; font-size: 30px; font-weight: 700; color: #fff; background: var(--black); margin-bottom: 18px; }
.steps li:nth-child(1)::before { background: var(--red); border-radius: 50%; }
.steps li:nth-child(2)::before { background: var(--yellow); color: var(--black); }
.steps li:nth-child(3)::before { background: var(--blue); clip-path: polygon(50% 0, 100% 100%, 0 100%); padding-top: 16px; }
.steps h3 { font-size: 28px; margin-bottom: 8px; }
.faq details { border-top: 3px solid var(--black); padding: 20px 0; }
.faq details:last-child { border-bottom: 3px solid var(--black); }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 20px; font-size: clamp(20px, 2vw, 28px); font-weight: 500; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; flex: 0 0 20px; height: 20px; background: var(--red); border-radius: 50%; transition: border-radius .3s, background .3s; }
.faq details[open] summary::after { border-radius: 0; background: var(--blue); }
.faq details p { margin: 14px 0 0; max-width: 70ch; color: var(--grey); }

/* contact */
.contact { display: grid; grid-template-columns: 2fr 1fr; border: 3px solid var(--black); background: #fff; }
.form { display: grid; grid-template-columns: 1fr 1fr; border-right: 3px solid var(--black); }
.field { display: flex; flex-direction: column; padding: 16px 20px; border-bottom: 3px solid var(--black); }
.field:nth-child(odd):not(.field--full) { border-right: 3px solid var(--black); }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 13px; text-transform: uppercase; letter-spacing: .12em; font-weight: 500; color: var(--grey); }
.field input, .field select, .field textarea { font: 400 20px var(--font); border: 0; background: transparent; padding: 8px 0; color: var(--black); border-radius: 0; appearance: none; }
.field textarea { min-height: 150px; resize: vertical; }
.field:focus-within { background: #fff8de; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; }
.form .actions { grid-column: 1 / -1; padding: 20px; }
.form-note { grid-column: 1 / -1; margin: 0; padding: 18px 20px; background: var(--yellow); }
.contact-side { display: grid; grid-template-rows: 1fr 1fr 1fr; }
.contact-side > div { padding: 24px; display: flex; flex-direction: column; justify-content: center; }
.contact-side h3 { font-size: 26px; margin-bottom: 6px; }

/* 6. Footer ---------------------------------------------------------------- */
.site-footer { margin-top: var(--space); border-top: 3px solid var(--black); }
.footer-blocks { display: grid; grid-template-columns: repeat(3, 1fr); }
.fb { padding: clamp(28px, 4vw, 56px) var(--gutter); font-size: clamp(22px, 2.6vw, 40px); font-weight: 700; letter-spacing: -0.02em; display: flex; flex-direction: column; gap: 8px; min-height: 200px; justify-content: flex-end; overflow-wrap: anywhere; transition: filter .2s; }
.fb small { font-size: 14px; font-weight: 500; text-transform: uppercase; letter-spacing: .14em; }
.fb:hover { filter: brightness(1.08); }
.fb-red { background: var(--red); color: #fff; }
.fb-yellow { background: var(--yellow); }
.fb-blue { background: var(--blue); color: #fff; }
.footer-row { display: flex; justify-content: space-between; gap: 16px; padding-top: 22px; padding-bottom: 22px; font-size: 14px; text-transform: uppercase; letter-spacing: .06em; flex-wrap: wrap; }

/* 7. Responsive ------------------------------------------------------------ */
@media (max-width: 1080px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(2, 1fr); row-gap: 36px; }
  .hero { grid-template-columns: repeat(3, 1fr); }
  .hero-title { grid-column: 1 / -1; border-right: 0; }
  .hero-art { grid-row: auto; grid-column: 1 / -1; border-top: 3px solid var(--black); max-height: 520px; }
  .block:last-child { border-right: 0; }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .menu-btn { display: inline-flex; gap: 4px; align-items: center; background: none; border: 3px solid var(--black); padding: 10px; cursor: pointer; position: relative; z-index: 60; }
  .menu-btn i { width: 12px; height: 12px; display: block; }
  .menu-btn i:nth-child(1) { background: var(--red); border-radius: 50%; }
  .menu-btn i:nth-child(2) { background: var(--yellow); }
  .menu-btn i:nth-child(3) { background: var(--blue); clip-path: polygon(50% 0, 100% 100%, 0 100%); }
  .site-nav { position: fixed; inset: 0; z-index: 55; background: var(--paper); flex-direction: column; height: auto; padding-top: 83px; visibility: hidden; opacity: 0; transition: opacity .3s, visibility .3s; }
  .site-nav a { flex: 1; padding: 0 var(--gutter); font-size: 40px; font-weight: 700; border-bottom: 3px solid var(--black); }
  .site-nav a::before { bottom: 0; }
  .menu-open .site-nav { visibility: visible; opacity: 1; }
  .menu-open { overflow: hidden; }
  .hero { grid-template-columns: 1fr; }
  .block { border-right: 0; min-height: 0; }
  .manifesto, .grid, .case-top, .text-2, .team, .svc-grid, .contact, .form, .page-head, .footer-blocks, .diagrams { grid-template-columns: 1fr; }
  .page-head > div:first-child { border-right: 0; }
  .page-head .swatch { grid-template-rows: none; grid-template-columns: 1fr 1fr 1fr; height: 18px; }
  .case-top .pic { border-right: 0; border-bottom: 3px solid var(--black); }
  .case-top .pic img { min-height: 0; aspect-ratio: 4 / 3; }
  .svc, .svc:nth-child(n) { border-right: 0 !important; border-bottom: 3px solid var(--black); min-height: 0; }
  .svc:last-child { border-bottom: 0; }
  .form { border-right: 0; border-bottom: 3px solid var(--black); }
  .field:nth-child(odd):not(.field--full) { border-right: 0; }
  .contact-side { grid-template-rows: none; }
  .steps { grid-template-columns: 1fr; }
  .fb { min-height: 140px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}