@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,300;9..144,400;9..144,500;9..144,600&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root{
  --clay:#c1652f;
  --clay-light:#e2a06e;
  --moss:#5f7a49;
  --moss-light:#9db881;
  --sand:#e9e2d2;
  --sand-light:#f4f0e6;
  --stone:#5f5a4d;
  --ink:#15130f;
  --line:rgba(21,19,15,0.12);
  --line-light:rgba(244,240,230,0.16);
  font-size:16px;
}

*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:auto;}
body{
  font-family:'Inter',sans-serif;
  background:var(--sand-light);
  color:var(--ink);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{font-family:'Fraunces',serif;font-weight:500;letter-spacing:-0.01em;}
a{color:inherit;text-decoration:none;}
.container{max-width:1180px;margin:0 auto;padding:0 32px;}
img{display:block;max-width:100%;}

::selection{background:var(--clay);color:#fff;}

/* scroll progress */
#scroll-progress{position:fixed;top:0;left:0;height:3px;background:var(--clay);width:0%;z-index:200;}

#yf-tag{position:fixed;bottom:20px;left:20px;z-index:150;}
#yf-tag a{
  background:var(--ink);color:var(--sand-light);font-size:12px;letter-spacing:0.04em;
  padding:9px 16px;border-radius:100px;font-family:'Inter',sans-serif;font-weight:500;
  box-shadow:0 6px 20px rgba(0,0,0,0.25);
}

/* NAV — permanent scrim so the brand never floats bare over content, deeper bar once scrolled */
#nav-scrim{position:fixed;top:0;left:0;right:0;height:130px;z-index:90;pointer-events:none;background:linear-gradient(180deg, rgba(12,11,8,0.55) 0%, rgba(12,11,8,0.0) 100%);}
#nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:26px 0;transition:padding .3s ease, background .3s ease, box-shadow .3s ease;}
#nav.scrolled{padding:16px 0;background:rgba(21,19,15,0.82);backdrop-filter:blur(10px);box-shadow:0 1px 0 var(--line-light);}
.nav-inner{max-width:1180px;margin:0 auto;padding:0 32px;display:flex;justify-content:space-between;align-items:center;}
.brand{font-family:'Fraunces',serif;font-size:20px;font-weight:500;letter-spacing:0.04em;color:#fff;text-shadow:0 1px 8px rgba(0,0,0,0.4);}
.nav-links{display:flex;gap:34px;}
.nav-links a{color:rgba(255,255,255,0.78);font-size:13px;letter-spacing:0.03em;font-weight:500;transition:color .2s;text-shadow:0 1px 8px rgba(0,0,0,0.4);}
.nav-links a:hover{color:var(--clay-light);}
@media(max-width:820px){.nav-links{display:none;}}

/* HERO */
#hero{position:relative;height:100vh;min-height:640px;overflow:hidden;background:#111008;}
#terrain-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;}
.hero-scrim{position:absolute;inset:0;background:linear-gradient(180deg, rgba(17,16,8,0.15) 0%, rgba(17,16,8,0.05) 45%, rgba(17,16,8,0.65) 100%);pointer-events:none;}
.hero-content{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:flex-end;padding:0 32px 90px;max-width:1180px;margin:0 auto;}
.hero-eyebrow{color:var(--clay);font-size:12px;letter-spacing:0.15em;font-weight:600;margin-bottom:18px;}
.hero-headline{font-size:clamp(40px,7vw,88px);line-height:0.98;color:#fdfbf5;max-width:820px;}
.hero-sub{color:rgba(253,251,245,0.72);font-size:17px;max-width:460px;margin-top:22px;line-height:1.55;}
.hero-scroll-cue{margin-top:56px;display:flex;align-items:center;gap:10px;color:rgba(253,251,245,0.55);font-size:12px;letter-spacing:0.05em;}
.hero-scroll-cue span{width:1px;height:34px;background:rgba(253,251,245,0.4);position:relative;overflow:hidden;}
.hero-scroll-cue span::after{content:'';position:absolute;top:-100%;left:0;width:100%;height:100%;background:var(--clay);animation:scrollcue 1.8s ease-in-out infinite;}
@keyframes scrollcue{0%{top:-100%;}50%{top:0;}100%{top:100%;}}

/* section commons */
section{position:relative;padding:130px 0;}
.section-label{font-size:12px;letter-spacing:0.14em;font-weight:600;color:var(--clay);margin-bottom:18px;}
.section-title{font-size:clamp(30px,4vw,48px);margin-bottom:0;}

/* PHILOSOPHY */
#philosophy{background:var(--ink);color:var(--sand-light);overflow:hidden;}
#philosophy .section-label{color:var(--clay-light);}
.contour-bg{position:absolute;inset:0;opacity:0.12;background-image:repeating-radial-gradient(circle at 30% 40%, transparent 0, transparent 38px, var(--sand-light) 39px, var(--sand-light) 40px);pointer-events:none;}
.manifesto{position:relative;font-family:'Fraunces',serif;font-weight:400;font-size:clamp(24px,3.4vw,42px);line-height:1.35;max-width:920px;color:rgba(244,240,230,0.5);}
.manifesto span{color:#fdfbf5;}
.phil-stats{position:relative;display:flex;gap:70px;margin-top:70px;flex-wrap:wrap;}
.phil-stat .n{font-family:'Fraunces',serif;font-size:44px;color:var(--clay-light);}
.phil-stat:nth-child(2) .n{color:var(--moss-light);}
.phil-stat .l{font-size:13px;color:rgba(244,240,230,0.55);margin-top:6px;max-width:170px;}

/* WORKS */
.works-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:18px;margin-top:50px;}
.work-card{display:block;position:relative;overflow:hidden;border-radius:4px;background:var(--ink);}
.work-card img{width:100%;height:100%;object-fit:cover;transition:transform .7s cubic-bezier(.2,.8,.2,1);}
.work-card:hover img{transform:scale(1.06);}
.work-1{grid-column:span 4;aspect-ratio:16/11;}
.work-2{grid-column:span 2;aspect-ratio:3/4;}
.work-3{grid-column:span 2;aspect-ratio:3/4;}
.work-4{grid-column:span 4;aspect-ratio:16/11;}
.work-info{position:absolute;left:0;right:0;bottom:0;padding:20px;background:linear-gradient(180deg,transparent,rgba(0,0,0,0.7));color:#fdfbf5;}
.work-tag{font-size:10px;letter-spacing:0.1em;font-weight:600;margin-bottom:4px;}
.work-tag.tag-arch{color:var(--clay-light);}
.work-tag.tag-land{color:var(--moss-light);}
.work-tag.tag-both{background:linear-gradient(90deg,var(--clay-light),var(--moss-light));-webkit-background-clip:text;background-clip:text;color:transparent;}
.work-name{font-family:'Fraunces',serif;font-size:19px;}
@media(max-width:760px){.works-grid{grid-template-columns:1fr;}.work-1,.work-2,.work-3,.work-4{grid-column:span 1;aspect-ratio:4/3;}}

/* STRUCTURE */
#structure{background:var(--ink);color:var(--sand-light);padding-left:0;padding-right:0;}
.structure-head{padding-top:0;}
.structure-sub{color:rgba(244,240,230,0.6);max-width:560px;margin-top:14px;font-size:15px;line-height:1.6;}

.structure-stage{
  position:relative;margin-top:50px;width:100%;
  height:min(78vh,760px);min-height:460px;
  background:radial-gradient(circle at 50% 35%, #241f18, #100e0a 78%);
  overflow:hidden;border-top:1px solid var(--line-light);border-bottom:1px solid var(--line-light);
}
#model-canvas{position:absolute;inset:0;width:100%;height:100%;cursor:grab;transition:opacity .5s ease;}
#model-canvas:active{cursor:grabbing;}
.structure-stage.plan-active #model-canvas{opacity:0;pointer-events:none;}
#blueprint{position:absolute;inset:0;width:100%;height:100%;opacity:0;pointer-events:none;transition:opacity .5s ease;background:#100e0a;}
#blueprint.active{opacity:1;pointer-events:auto;}
#bp-labels text, #bp-dims text{letter-spacing:0.05em;}

.stage-hint{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);font-size:11px;letter-spacing:0.05em;color:rgba(244,240,230,0.55);background:rgba(0,0,0,0.4);backdrop-filter:blur(6px);padding:7px 16px;border-radius:100px;pointer-events:none;transition:opacity .4s ease;}

.stage-toggle{position:absolute;top:20px;left:20px;display:flex;background:rgba(21,19,15,0.55);backdrop-filter:blur(8px);border:1px solid var(--line-light);border-radius:100px;padding:3px;z-index:5;}
.stage-views{position:absolute;top:20px;right:20px;display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end;max-width:60%;z-index:5;}

.toggle-btn,.view-btn{background:none;border:none;color:rgba(244,240,230,0.62);font-family:'Inter',sans-serif;font-size:12.5px;font-weight:500;padding:8px 15px;border-radius:100px;cursor:pointer;transition:all .25s;}
.toggle-btn.active{background:var(--clay);color:#fff;}
.view-btn{background:rgba(21,19,15,0.55);backdrop-filter:blur(8px);border:1px solid var(--line-light);}
.view-btn.active{background:var(--moss);border-color:var(--moss);color:#fff;}

.structure-footer{display:flex;gap:60px;align-items:flex-start;margin-top:44px;flex-wrap:wrap;}
.ctrl-group.tod{flex:1;min-width:240px;}
.ctrl-label{font-size:11px;letter-spacing:0.08em;color:rgba(244,240,230,0.5);margin-bottom:12px;font-weight:500;}
.ctrl-label span{color:var(--clay-light);}
#tod-slider{width:100%;accent-color:var(--clay);height:4px;}
.tod-marks{display:flex;justify-content:space-between;font-size:11px;color:rgba(244,240,230,0.4);margin-top:6px;}
.specs{list-style:none;flex:1;min-width:260px;}
.specs li{display:flex;justify-content:space-between;padding:11px 0;border-bottom:1px solid var(--line-light);font-size:13px;}
.specs li span{color:rgba(244,240,230,0.5);}
.specs li b{font-weight:500;color:var(--sand-light);text-align:right;}

@media(max-width:760px){
  .stage-views{max-width:100%;}
  .structure-stage{height:64vh;}
}

.site-photos-label{font-size:11px;letter-spacing:0.1em;color:rgba(244,240,230,0.4);font-weight:500;margin-top:60px;margin-bottom:18px;}
.site-photos{display:grid;grid-template-columns:1.3fr 1.3fr 1fr;gap:16px;}
.site-photos.site-photos-4{grid-template-columns:1.2fr 1.2fr 1fr 1fr;}
.site-photos img{width:100%;height:280px;object-fit:cover;border-radius:6px;filter:grayscale(0.06) saturate(1.05);transition:transform .6s cubic-bezier(.2,.8,.2,1);}
.site-photos img:hover{transform:scale(1.02);}
@media(max-width:900px){.site-photos.site-photos-4{grid-template-columns:1fr 1fr;}}
@media(max-width:820px){.site-photos{grid-template-columns:1fr;}.site-photos img{height:230px;}.site-photos.site-photos-4{grid-template-columns:1fr;}}

/* PROCESS */
#process{background:var(--sand);overflow:hidden;padding-bottom:0;}
.process-label{max-width:1180px;margin:0 auto;padding:0 32px;}
.process-track{display:flex;gap:0;margin-top:50px;overflow-x:auto;scrollbar-width:none;padding:0 32px 90px;}
.process-track::-webkit-scrollbar{display:none;}
.process-step{flex:0 0 auto;width:min(78vw,340px);padding:36px 30px 0;border-left:1px solid var(--line);margin-right:0;}
.step-num{font-family:'Fraunces',serif;font-size:15px;color:var(--clay);margin-bottom:18px;}
.process-step.accent-moss .step-num{color:var(--moss);}
.process-step h3{font-size:24px;margin-bottom:12px;}
.process-step p{font-size:14px;line-height:1.6;color:var(--stone);}

/* STUDIO */
.studio-grid{display:grid;grid-template-columns:0.9fr 1.1fr;gap:70px;align-items:center;}
.studio-photo{aspect-ratio:4/5;border-radius:6px;background:url('https://images.unsplash.com/photo-1503387762-592deb58ef4e?w=900&q=85') center/cover;}
.studio-content p{color:#5f5a4d;line-height:1.65;font-size:15px;margin-top:20px;max-width:520px;}
.studio-list{list-style:none;margin-top:26px;display:flex;flex-direction:column;gap:12px;}
.studio-list li{font-size:14px;color:var(--stone);display:flex;gap:10px;align-items:flex-start;}
.studio-list i{color:var(--clay);margin-top:3px;}
@media(max-width:820px){.studio-grid{grid-template-columns:1fr;}.studio-photo{aspect-ratio:16/9;}}

/* CONTACT */
#contact{background:var(--ink);color:var(--sand-light);text-align:center;}
#contact .section-label{color:var(--clay-light);justify-content:center;}
.contact-sub{color:rgba(244,240,230,0.6);max-width:480px;margin:18px auto 34px;font-size:15px;}
.btn-primary{display:inline-block;background:var(--clay);color:#fff;padding:16px 32px;border-radius:100px;font-size:14px;font-weight:600;letter-spacing:0.02em;transition:transform .25s, box-shadow .25s;}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(178,103,62,0.4);}

footer{background:var(--ink);color:rgba(244,240,230,0.5);padding:26px 0;font-size:12px;}
.footer-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;}
footer a{color:var(--sand-light);border-bottom:1px solid rgba(244,240,230,0.3);}

@media(max-width:600px){
  section{padding:80px 0;}
  .phil-stats{gap:36px;}
}