:root{
  --bg-0:#0f0d0b;
  --bg-1:#171310;
  --bg-2:#1e1915;
  --bg-3:#241e18;
  --line:rgba(242,239,233,0.14);
  --line-strong:rgba(242,239,233,0.28);
  --ink:#f2efe9;
  --ink-dim:rgba(242,239,233,0.62);
  --ink-faint:rgba(242,239,233,0.4);
  --accent:#c1682f;
  --accent-ink:#1b1310;
  --radius:2px;
  --mono:'IBM Plex Mono', ui-monospace, monospace;
  --display:'Space Grotesk', system-ui, sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--ink);
  font-family:var(--display);
  -webkit-font-smoothing:antialiased;
}

a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,p{margin:0;}
img,svg{display:block;max-width:100%;}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:0.9rem 1.6rem;
  border-radius:var(--radius);
  font-family:var(--display);
  font-size:0.82rem;
  letter-spacing:0.04em;
  text-transform:uppercase;
  white-space:nowrap;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform 0.25s cubic-bezier(.16,1,.3,1), background 0.25s, border-color 0.25s;
}
.btn:active{transform:scale(0.98);}
.btn--primary{
  background:var(--accent);
  color:var(--accent-ink);
}
.btn--primary:hover{background:#d47a41;}
.btn--outline{
  background:transparent;
  color:var(--ink);
  border-color:var(--line-strong);
}
.btn--outline:hover{border-color:var(--accent);color:var(--accent);}

/* ---------- NAV ---------- */
.nav{
  position:sticky;
  top:0;
  z-index:40;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1.5rem;
  padding:0 2rem;
  height:68px;
  background:rgba(17,19,19,0.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav__logo{
  font-weight:700;
  letter-spacing:0.08em;
  font-size:0.95rem;
}
.nav__links{
  display:flex;
  gap:1.75rem;
  font-family:var(--display);
  font-size:0.78rem;
  letter-spacing:0.02em;
  color:var(--ink-dim);
  flex:1;
  justify-content:center;
}
.nav__links a:hover{color:var(--ink);}
.nav__cta{
  font-family:var(--display);
  font-size:0.76rem;
  letter-spacing:0.03em;
  text-transform:uppercase;
  padding:0.55rem 1rem;
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
}
.nav__cta:hover{border-color:var(--accent);color:var(--accent);}

@media (max-width:860px){
  .nav__links{display:none;}
  .nav{padding:0 1.25rem;}
}

/* ---------- HERO ---------- */
.hero{
  position:relative;
  min-height:100dvh;
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  padding:0 2rem 3.5rem;
  overflow:hidden;
  background:var(--bg-0);
}
.hero__bg{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  z-index:0;
}
.hero__overlay{
  position:absolute;
  inset:0;
  z-index:1;
  background:
    linear-gradient(180deg, rgba(15,13,11,0.35) 0%, rgba(15,13,11,0.78) 62%, rgba(15,13,11,0.96) 100%),
    linear-gradient(90deg, rgba(15,13,11,0.55) 0%, rgba(15,13,11,0.1) 45%);
}
.hero__grid{
  position:absolute;
  inset:0;
  z-index:2;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size:80px 80px;
  opacity:0.25;
  mask-image:linear-gradient(to bottom, black, transparent 85%);
}
.hero__title{
  position:relative;
  z-index:3;
  font-size:clamp(3.2rem, 11vw, 8.5rem);
  line-height:0.92;
  font-weight:700;
  letter-spacing:-0.02em;
  margin:0 0 2.5rem;
  text-shadow:0 2px 24px rgba(0,0,0,0.4);
}
.hero__row{
  position:relative;
  z-index:3;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:2rem;
  flex-wrap:wrap;
  border-top:1px solid var(--line);
  padding-top:1.5rem;
}
.hero__sub{
  max-width:38ch;
  color:var(--ink-dim);
  font-size:1rem;
  line-height:1.55;
}

@media (max-width:640px){
  .hero{padding:0 1.25rem 2.5rem;}
  .hero__row{flex-direction:column;align-items:flex-start;}
}

/* ---------- SECTION SHELL ---------- */
.section{
  padding:6rem 2rem;
  max-width:1280px;
  margin:0 auto;
}
.section__title{
  font-size:clamp(1.9rem, 4vw, 3rem);
  font-weight:600;
  letter-spacing:-0.01em;
  margin-bottom:3rem;
  max-width:16ch;
}

@media (max-width:640px){
  .section{padding:4rem 1.25rem;}
}

/* ---------- WHAT WE BUILD ---------- */
.what{background:var(--bg-0);}
.what__grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr;
  gap:1.25rem;
}
.house-card{
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  background:var(--bg-1);
  display:flex;
  flex-direction:column;
}
.house-card--wide{grid-row:span 1;}
.house-card__art{
  aspect-ratio:16/10;
  position:relative;
  background:var(--bg-2);
  overflow:hidden;
}
.house-card__art img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform 0.6s cubic-bezier(.16,1,.3,1);
}
.house-card:hover .house-card__art img{transform:scale(1.04);}
.house-card__body{padding:1.5rem;}
.house-card__body h3{font-size:1.15rem;font-weight:600;margin-bottom:0.6rem;}
.house-card__body p{color:var(--ink-dim);font-size:0.92rem;line-height:1.55;}

@media (max-width:900px){
  .what__grid{grid-template-columns:1fr;}
}

/* ---------- WHY ---------- */
.why{background:var(--bg-1);}
.why__grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.why__item{
  background:var(--bg-1);
  padding:2.25rem 1.75rem;
}
.why__icon{
  width:30px;height:30px;
  color:var(--accent);
  margin-bottom:1.5rem;
}
.why__item h3{font-size:1.05rem;font-weight:600;margin-bottom:0.6rem;}
.why__item p{color:var(--ink-dim);font-size:0.9rem;line-height:1.55;}

@media (max-width:900px){
  .why__grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:560px){
  .why__grid{grid-template-columns:1fr;}
}

/* ---------- PROCESS ---------- */
.process{background:var(--bg-0);}
.process__list{
  display:grid;
  grid-template-columns:repeat(6,1fr);
  gap:1.25rem;
}
.process__step{
  border-top:1px solid var(--line-strong);
  padding-top:1.25rem;
}
.process__num{
  display:block;
  font-family:var(--display);
  color:var(--accent);
  font-size:0.85rem;
  margin-bottom:1.5rem;
}
.process__step h3{font-size:1.05rem;font-weight:600;margin-bottom:0.5rem;}
.process__step p{color:var(--ink-dim);font-size:0.86rem;line-height:1.5;}

@media (max-width:960px){
  .process__list{grid-template-columns:repeat(3,1fr);}
}
@media (max-width:640px){
  .process__list{grid-template-columns:repeat(2,1fr);}
}

/* ---------- PROJECTS ---------- */
.projects{background:var(--bg-1);}
.projects__grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:1.25rem;
}
.project-card{
  border:1px solid var(--line);
  background:var(--bg-2);
  border-radius:var(--radius);
  overflow:hidden;
}
.project-card__art{
  aspect-ratio:16/9;
  background:var(--bg-3);
  position:relative;
  overflow:hidden;
}
.project-card__art img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform 0.6s cubic-bezier(.16,1,.3,1);
}
.project-card:hover .project-card__art img{transform:scale(1.04);}
.project-card__body{padding:1.5rem 1.5rem 1.75rem;}
.project-card__body h3{font-size:1.2rem;font-weight:600;margin-bottom:0.6rem;}
.project-card__body p{color:var(--ink-dim);font-size:0.9rem;line-height:1.5;margin-bottom:1.25rem;}
.project-card__specs{
  display:flex;
  gap:1.75rem;
  border-top:1px solid var(--line);
  padding-top:1rem;
  font-family:var(--display);
}
.project-card__specs li{display:flex;flex-direction:column;gap:0.3rem;}
.project-card__specs span{font-size:0.7rem;color:var(--ink-faint);text-transform:uppercase;letter-spacing:0.05em;}
.project-card__specs b{font-size:0.95rem;font-weight:500;}

@media (max-width:760px){
  .projects__grid{grid-template-columns:1fr;}
}

/* ---------- CALCULATOR ---------- */
.calc{background:var(--bg-0);}
.calc__note{color:var(--ink-dim);font-size:0.95rem;max-width:56ch;margin-bottom:3rem;}
.calc__box{
  display:grid;
  grid-template-columns:1.2fr 1fr;
  gap:2px;
  background:var(--line);
  border:1px solid var(--line);
}
.calc__controls{
  background:var(--bg-1);
  padding:2.5rem;
  display:flex;
  flex-direction:column;
  gap:2rem;
}
.field label{
  display:block;
  font-family:var(--display);
  font-size:0.78rem;
  text-transform:uppercase;
  letter-spacing:0.04em;
  color:var(--ink-dim);
  margin-bottom:0.9rem;
}
.field input[type="range"]{
  width:100%;
  accent-color:var(--accent);
}
.field__value{
  margin-top:0.6rem;
  font-family:var(--display);
  font-size:0.9rem;
  color:var(--ink);
}
.field select{
  width:100%;
  background:var(--bg-2);
  color:var(--ink);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  padding:0.75rem 0.9rem;
  font-family:var(--display);
  font-size:0.95rem;
}
.field select:focus,.field input:focus{outline:2px solid var(--accent);outline-offset:2px;}

.calc__result{
  background:var(--bg-2);
  padding:2.5rem;
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:0.5rem;
}
.calc__result-label{
  font-family:var(--display);
  font-size:0.78rem;
  text-transform:uppercase;
  letter-spacing:0.04em;
  color:var(--ink-dim);
}
.calc__result-value{
  font-size:clamp(2.2rem,4vw,3rem);
  font-weight:700;
  color:var(--accent);
  margin-bottom:0.25rem;
}
.calc__result-hint{
  color:var(--ink-faint);
  font-size:0.85rem;
  margin-bottom:1.75rem;
}
.calc__result .btn{align-self:flex-start;}

@media (max-width:820px){
  .calc__box{grid-template-columns:1fr;}
}

/* ---------- CTA ---------- */
.cta{
  background:linear-gradient(180deg, var(--bg-1), var(--bg-0));
  padding:7rem 2rem;
  text-align:center;
  border-top:1px solid var(--line);
}
.cta__title{
  font-size:clamp(2.2rem,5vw,3.6rem);
  font-weight:700;
  letter-spacing:-0.01em;
  margin-bottom:1.25rem;
}
.cta__sub{
  color:var(--ink-dim);
  max-width:46ch;
  margin:0 auto 2.5rem;
  font-size:1rem;
  line-height:1.55;
}
.cta__form{
  display:flex;
  gap:0.85rem;
  justify-content:center;
  flex-wrap:wrap;
  max-width:640px;
  margin:0 auto;
}
.cta__form input{
  flex:1;
  min-width:180px;
  background:var(--bg-2);
  border:1px solid var(--line-strong);
  color:var(--ink);
  border-radius:var(--radius);
  padding:0.9rem 1.1rem;
  font-family:var(--display);
  font-size:0.95rem;
}
.cta__form input::placeholder{color:var(--ink-faint);}
.cta__form input:focus{outline:2px solid var(--accent);outline-offset:2px;}
.cta__done{
  margin-top:1.5rem;
  color:var(--accent);
  font-family:var(--mono);
  font-size:0.9rem;
}

@media (max-width:640px){
  .cta{padding:5rem 1.25rem;}
  .cta__form{flex-direction:column;}
}

/* ---------- FOOTER ---------- */
.footer{
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:0.5rem;
  padding:2rem;
  font-family:var(--display);
  font-size:0.78rem;
  color:var(--ink-faint);
  border-top:1px solid var(--line);
}

/* ---------- SCROLL REVEAL ---------- */
.reveal{
  opacity:0;
  transform:translateY(24px);
  transition:opacity 0.7s cubic-bezier(.16,1,.3,1), transform 0.7s cubic-bezier(.16,1,.3,1);
}
.reveal.is-visible{
  opacity:1;
  transform:translateY(0);
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  .btn{transition:none;}
}