/* ==========================================================================
   Brise — solar shading template · archesign.studio
   1. Tokens  2. Base  3. Header  4. Components  5. Pages  6. Footer  7. Responsive
   ========================================================================== */

/* 1. Tokens ---------------------------------------------------------------- */
:root {
  --sand: #f4ead8;
  --dune: #e9d9bd;
  --amber: #f2a33a;
  --terra: #b4532a;
  --char: #24211d;
  --shade: #5c6f86;
  --muted: #7b6f5f;

  --font-display: "Unbounded", "Arial Black", Arial, sans-serif;
  --font-body: "Karla", "Helvetica Neue", Arial, sans-serif;

  --gutter: clamp(16px, 3vw, 40px);
  --max: 1320px;
  --space: clamp(80px, 10vw, 150px);
  --sun: linear-gradient(180deg, #ffd38a 0%, #f2a33a 55%, #e07c2c 100%);
  --ease: cubic-bezier(.2, .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(--sand); color: var(--char); font: 400 18px/1.65 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, h4 { font-family: var(--font-display); font-weight: 400; margin: 0; line-height: 1.05; letter-spacing: -0.02em; }
h4 { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 10px; color: var(--amber); }
:focus-visible { outline: 2px solid var(--terra); outline-offset: 3px; }
::selection { background: var(--amber); color: var(--char); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--char); color: var(--sand); 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; }
.pre { font: 600 13px var(--font-body); letter-spacing: .16em; text-transform: uppercase; color: var(--terra); margin: 0 0 18px; display: flex; align-items: center; gap: 12px; }
.pre::before { content: ""; width: 12px; height: 12px; border-radius: 50%; background: var(--sun); }
.muted { color: var(--muted); }
.h-l { font-size: clamp(32px, 4.2vw, 60px); }

/* 3. Header ---------------------------------------------------------------- */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--sand); border-bottom: 1px solid rgba(36, 33, 29, .12); }
.header-row { display: flex; align-items: center; justify-content: space-between; height: 78px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font: 600 24px var(--font-display); letter-spacing: -0.03em; margin: 0; }
.logo small { font: 500 12px var(--font-body); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-left: 4px; }
.sun { width: 22px; height: 22px; border-radius: 50%; background: var(--sun); box-shadow: 0 0 0 4px rgba(242, 163, 58, .2); display: inline-block; }
.site-nav { display: flex; gap: 34px; }
.site-nav a { font-weight: 500; font-size: 16px; padding: 6px 0; position: relative; }
.site-nav a::after { content: ""; position: absolute; left: 0; bottom: 0; height: 3px; width: 0; background: var(--amber); transition: width .35s var(--ease); }
.site-nav a:hover::after, .site-nav a[aria-current="page"]::after { width: 100%; }
.menu-btn { display: none; }

/* 4. Components ------------------------------------------------------------ */
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 16px 28px; border-radius: 4px; background: var(--char); color: var(--sand); font: 600 16px var(--font-body); border: 0; cursor: pointer; transition: background .25s, color .25s; }
.btn:hover { background: var(--terra); }
.btn--amber { background: var(--amber); color: var(--char); }
.btn--amber:hover { background: var(--sand); }
.btn--line { background: transparent; color: var(--char); box-shadow: inset 0 0 0 2px var(--char); }
.btn--line:hover { background: var(--char); color: var(--sand); }
.pic { overflow: hidden; background: var(--dune); }
.pic img { width: 100%; aspect-ratio: var(--ratio, 4 / 5); object-fit: cover; transition: transform 1s var(--ease); }
a:hover .pic img { transform: scale(1.04); }
.js .reveal { opacity: 0; transform: translateX(-24px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.js .reveal.is-in { opacity: 1; transform: none; }

/* interactive louvre demo (driven by data-compare → --pos) */
.fin-demo { --pos: 40%; position: relative; border-radius: 6px; overflow: hidden; background: var(--sun); aspect-ratio: 5 / 4; box-shadow: 0 30px 60px -40px rgba(36, 33, 29, .7); }
.fin-demo .room { position: absolute; inset: auto 0 0 0; height: 26%; background: #3a332b; }
.fin-demo .light { position: absolute; left: 0; bottom: 0; height: 26%; width: calc(100% - var(--pos)); background: linear-gradient(90deg, rgba(255, 214, 140, .55), rgba(255, 214, 140, .1)); transition: width .1s; }
.fin-demo .fins { position: absolute; inset: 0 0 26% 0; display: flex; }
.fin-demo .fins i { flex: 1; display: flex; justify-content: center; }
.fin-demo .fins i::before { content: ""; width: var(--pos); height: 100%; background: linear-gradient(90deg, #efe2c8, #d9c6a4); box-shadow: 6px 0 10px -4px rgba(36, 33, 29, .35); transition: width .1s; }
.fin-demo .ctl { position: absolute; left: 16px; right: 16px; bottom: 14px; display: flex; align-items: center; gap: 14px; background: rgba(36, 33, 29, .82); color: var(--sand); padding: 12px 16px; border-radius: 6px; font-size: 14px; }
.fin-demo input[type="range"] { flex: 1; accent-color: var(--amber); }
.fin-demo .lbl { white-space: nowrap; font-weight: 600; }

/* 5. Pages ----------------------------------------------------------------- */
.hero { padding: clamp(36px, 5vw, 72px) 0 var(--space); }
.hero-grid { display: grid; grid-template-columns: 6fr 6fr; gap: clamp(32px, 5vw, 80px); align-items: center; }
.hero h1 { font-size: clamp(40px, 5.6vw, 88px); line-height: 1.02; letter-spacing: -0.04em; }
.hero h1 span { color: var(--terra); }
.hero .lead { font-size: clamp(18px, 1.5vw, 21px); color: var(--muted); max-width: 44ch; margin: 24px 0 32px; }
.hero .actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* numbers band */
.band { background: var(--char); color: var(--sand); }
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); }
.metric { padding: 40px 28px; border-right: 1px solid rgba(244, 234, 216, .14); }
.metric:last-child { border-right: 0; }
.metric b { display: block; font: 400 clamp(36px, 4.4vw, 64px) var(--font-display); letter-spacing: -0.04em; color: var(--amber); line-height: 1; margin-bottom: 10px; }
.metric span { color: #cbbda4; font-size: 15px; }

/* systems cards */
.systems { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gutter); }
.system { display: block; }
.system .pic img { aspect-ratio: 10 / 11; }
.system h3 { font-size: 22px; margin: 18px 0 8px; }
.system p { color: var(--muted); font-size: 16px; margin: 0; }
.system .tag { display: inline-block; margin-top: 12px; font: 600 12px var(--font-body); letter-spacing: .12em; text-transform: uppercase; color: var(--terra); }

/* split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 96px); align-items: center; }
.ticks { list-style: none; padding: 0; margin: 24px 0 0; }
.ticks li { padding: 12px 0 12px 34px; border-top: 1px solid rgba(36, 33, 29, .12); position: relative; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 18px; width: 18px; height: 10px; background: repeating-linear-gradient(90deg, var(--terra) 0 3px, transparent 3px 6px); }

/* projects */
.page-head { padding: clamp(56px, 8vw, 120px) 0 clamp(40px, 5vw, 72px); border-bottom: 1px solid rgba(36, 33, 29, .12); }
.page-head h1 { font-size: clamp(44px, 6.8vw, 104px); letter-spacing: -0.045em; line-height: 1; }
.page-head p { max-width: 56ch; color: var(--muted); margin-top: 22px; font-size: 19px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 40px 0; }
.filters button { font: 600 15px var(--font-body); padding: 11px 18px; border-radius: 4px; border: 2px solid var(--char); background: transparent; color: var(--char); cursor: pointer; }
.filters button[aria-pressed="true"] { background: var(--amber); border-color: var(--amber); }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px var(--gutter); }
.card { display: block; }
.card h3 { font-size: 22px; margin: 18px 0 6px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card .perf { display: inline-block; margin-top: 10px; background: var(--char); color: var(--amber); font: 600 13px var(--font-body); padding: 4px 10px; border-radius: 3px; }
.card[hidden] { display: none; }

/* project */
.perf-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px; background: var(--char); border: 2px solid var(--char); }
.perf-grid div { background: var(--sand); padding: 22px; }
.perf-grid span { font-size: 13px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.perf-grid b { display: block; font: 400 30px var(--font-display); letter-spacing: -0.03em; margin-top: 6px; }
.perf-grid .hl { background: var(--amber); }
.prose { max-width: 720px; }
.prose h2 { font-size: clamp(28px, 3.2vw, 44px); margin-bottom: 20px; }
.bars { display: grid; gap: 16px; margin-top: 26px; }
.bar span { display: flex; justify-content: space-between; font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.bar i { display: block; height: 14px; background: var(--dune); position: relative; border-radius: 2px; overflow: hidden; }
.bar i::after { content: ""; position: absolute; inset: 0 auto 0 0; width: var(--v); background: var(--sun); }

/* about */
.team { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gutter); }
.team .pic img { aspect-ratio: 1; filter: sepia(.25); }
.team h3 { font-size: 20px; margin-top: 16px; }
.lab { background: var(--char); color: var(--sand); padding: clamp(32px, 5vw, 64px); border-radius: 6px; display: grid; grid-template-columns: 1fr 1fr; gap: var(--gutter); align-items: center; }
.lab h2 { font-size: clamp(28px, 3.4vw, 46px); }
.lab p { color: #cbbda4; }

/* services */
.sys-list { display: grid; gap: 2px; background: rgba(36, 33, 29, .14); }
.sys-row { display: grid; grid-template-columns: 90px 1.2fr 2fr 1fr; gap: 28px; align-items: center; padding: 28px 24px; background: var(--sand); transition: background .25s; }
.sys-row:hover { background: #f9f0e1; }
.sys-row .n { font: 400 34px var(--font-display); color: var(--amber); }
.sys-row h3 { font-size: 24px; }
.sys-row p { margin: 0; color: var(--muted); }
.sys-row .spec { font-weight: 600; font-size: 15px; text-align: right; }
.faq { max-width: 860px; }
.faq details { border-bottom: 2px solid var(--char); padding: 22px 0; }
.faq details:first-child { border-top: 2px solid var(--char); }
.faq summary { cursor: pointer; list-style: none; display: block; position: relative; padding-right: 40px; font: 400 20px var(--font-display); letter-spacing: -0.02em; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; position: absolute; right: 0; top: 2px; width: 22px; height: 22px; border-radius: 50%; background: var(--dune); transition: background .3s; }
.faq details[open] summary::after { background: var(--sun); }
.faq details p { margin: 12px 0 0; color: var(--muted); }

/* contact */
.contact { display: grid; grid-template-columns: 7fr 5fr; gap: clamp(32px, 6vw, 96px); align-items: start; }
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field--full { grid-column: 1 / -1; }
.field label { font-weight: 600; font-size: 14px; }
.field input, .field select, .field textarea { font: 400 17px var(--font-body); color: var(--char); background: #fbf6ec; border: 2px solid var(--dune); border-radius: 4px; padding: 13px 14px; appearance: none; }
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--amber); }
.orient { display: flex; flex-wrap: wrap; gap: 8px; }
.orient label { position: relative; }
.orient input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.orient span { display: inline-grid; place-items: center; width: 54px; height: 44px; border: 2px solid var(--dune); border-radius: 4px; font-weight: 600; cursor: pointer; background: #fbf6ec; }
.orient input:checked + span { background: var(--amber); border-color: var(--amber); }
.orient input:focus-visible + span { outline: 2px solid var(--terra); outline-offset: 2px; }
fieldset.field { border: 0; padding: 0; margin: 0; }
fieldset.field legend { font-weight: 600; font-size: 14px; margin-bottom: 6px; padding: 0; }
.form-note { grid-column: 1 / -1; background: var(--char); color: var(--amber); padding: 14px 16px; border-radius: 4px; margin: 0; }
.side { background: var(--dune); border-radius: 6px; padding: 32px; }
.side h3 { font-size: 22px; margin-bottom: 12px; }

/* 6. Footer ---------------------------------------------------------------- */
.site-footer { background: var(--char); color: var(--sand); margin-top: var(--space); }
.fins-band { height: 56px; background: repeating-linear-gradient(90deg, var(--amber) 0 10px, transparent 10px 22px), var(--sun); background-blend-mode: multiply; }
.f-top { display: flex; justify-content: space-between; align-items: end; gap: 28px; flex-wrap: wrap; padding: clamp(56px, 8vw, 110px) 0 56px; border-bottom: 1px solid rgba(244, 234, 216, .14); }
.f-top h2 { font-size: clamp(30px, 4.4vw, 64px); letter-spacing: -0.04em; }
.f-top h2 span { color: var(--amber); }
.f-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--gutter); padding: 48px 0 32px; font-size: 15px; }
.f-grid .logo { font-size: 22px; margin-bottom: 10px; }
.dim { color: #b3a68f; }
.f-grid a:hover { color: var(--amber); }
.f-base { font-size: 13px; color: #8d826f; margin: 0; padding-bottom: 28px; }

/* 7. Responsive ------------------------------------------------------------ */
@media (max-width: 1080px) {
  .systems { grid-template-columns: repeat(2, 1fr); }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .metric:nth-child(2) { border-right: 0; }
  .metric:nth-child(-n+2) { border-bottom: 1px solid rgba(244, 234, 216, .14); }
  .grid3 { grid-template-columns: repeat(2, 1fr); }
  .sys-row { grid-template-columns: 60px 1fr; }
  .sys-row p, .sys-row .spec { grid-column: 2; text-align: left; }
  .perf-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  body { font-size: 16px; }
  .menu-btn { display: inline-block; background: var(--amber); border: 0; border-radius: 4px; padding: 11px 18px; font: 600 15px var(--font-body); color: var(--char); cursor: pointer; position: relative; z-index: 60; }
  .site-nav { position: fixed; inset: 0; z-index: 55; background: var(--char); flex-direction: column; justify-content: center; padding: 0 var(--gutter); gap: 4px; opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s; }
  .site-nav a { font: 400 36px var(--font-display); color: var(--sand); letter-spacing: -0.03em; }
  .menu-open .site-nav { opacity: 1; visibility: visible; }
  .menu-open .menu-btn { background: var(--sand); }
  .menu-open { overflow: hidden; }
  .hero-grid, .split, .lab, .contact, .form { grid-template-columns: 1fr; }
  .fin-demo { aspect-ratio: 4 / 5; }
  .fin-demo .lbl { display: none; }
  .team { grid-template-columns: 1fr 1fr; }
  .f-grid { grid-template-columns: 1fr 1fr; }
  .f-grid > :first-child { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .systems, .grid3, .metrics { grid-template-columns: 1fr; }
  .metric { border-right: 0; border-bottom: 1px solid rgba(244, 234, 216, .14); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}