/* Shared styles for project deep-dive pages.
   Design tokens mirror index.html. */

*{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#FAFAF8;
  --surface:#FFFFFF;
  --surface2:#F4F3EF;
  --border:#E8E6E0;
  --border2:#D4D1CA;
  --text:#1A1916;
  --text2:#6B6860;
  --text3:#A8A69F;
  --accent:#1A1916;
  --accent-warm:#C4773B;
  --green:#2D6A4F;
  --radius:10px;
  --radius-lg:16px;
  --radius-xl:24px;
}
html{scroll-behavior:smooth}
body{
  font-family:'DM Sans',sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:15px;
  line-height:1.6;
  min-height:100vh;
}

/* NAV */
nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 48px;
  background:rgba(250,250,248,0.85);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color 0.3s;
}
nav.scrolled{border-bottom-color:var(--border)}
.nav-logo{
  font-family:'Instrument Serif',serif;
  font-size:18px;color:var(--text);text-decoration:none;
  letter-spacing:-0.01em;
}
.nav-links{display:flex;gap:32px;align-items:center}
.nav-links a{
  font-size:13px;color:var(--text2);text-decoration:none;
  letter-spacing:0.02em;transition:color 0.2s;
}
.nav-links a:hover{color:var(--text)}
.nav-cta{
  background:var(--text);color:#fff!important;
  padding:8px 18px;border-radius:99px;
  font-size:13px!important;transition:opacity 0.2s!important;
}
.nav-cta:hover{opacity:0.8!important}

/* PAGE HEADER */
.proj-hero{
  max-width:900px;margin:0 auto;
  padding:150px 48px 56px;
}
.breadcrumb{
  font-size:12px;color:var(--text3);margin-bottom:28px;
  letter-spacing:0.02em;
}
.breadcrumb a{color:var(--text3);text-decoration:none;transition:color 0.2s}
.breadcrumb a:hover{color:var(--text)}
.proj-eyebrow{
  font-size:11px;font-weight:500;color:var(--accent-warm);
  letter-spacing:0.12em;text-transform:uppercase;margin-bottom:18px;
}
.proj-title{
  font-family:'Instrument Serif',serif;
  font-size:clamp(38px,6vw,64px);
  font-weight:400;line-height:1.05;letter-spacing:-0.03em;
  margin-bottom:20px;
}
.proj-title em{font-style:italic;color:var(--accent-warm)}
.proj-lede{
  font-size:18px;font-weight:300;color:var(--text2);
  line-height:1.7;max-width:660px;margin-bottom:28px;
}
.proj-meta{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));
  gap:1px;background:var(--border);
  border:1px solid var(--border);border-radius:var(--radius-lg);
  overflow:hidden;margin-bottom:28px;
}
.meta-cell{background:var(--surface);padding:16px 18px}
.meta-label{
  font-size:10px;letter-spacing:0.1em;text-transform:uppercase;
  color:var(--text3);margin-bottom:5px;
}
.meta-value{font-size:14px;color:var(--text);line-height:1.5}
.proj-tech{display:flex;gap:6px;flex-wrap:wrap}
.tech-chip{
  font-size:11px;padding:4px 11px;
  background:var(--surface2);border:1px solid var(--border);
  border-radius:99px;color:var(--text2);
}

/* SECTIONS */
.proj-body{max-width:900px;margin:0 auto;padding:0 48px 80px}
.proj-section{padding:48px 0;border-top:1px solid var(--border)}
.section-label{
  font-size:11px;font-weight:500;color:var(--text3);
  letter-spacing:0.12em;text-transform:uppercase;
  margin-bottom:14px;display:flex;align-items:center;gap:10px;
}
.section-label::before{content:'';width:20px;height:1px;background:var(--text3)}
.proj-h2{
  font-family:'Instrument Serif',serif;
  font-size:clamp(26px,3.4vw,36px);
  font-weight:400;letter-spacing:-0.02em;line-height:1.15;
  margin-bottom:22px;
}
.proj-h3{
  font-size:16px;font-weight:500;color:var(--text);
  margin:32px 0 10px;
}
.proj-body p{font-size:15.5px;color:var(--text2);line-height:1.8;margin-bottom:16px;max-width:720px}
.proj-body p strong{color:var(--text);font-weight:500}
.proj-body ul{list-style:none;margin:0 0 18px;max-width:720px}
.proj-body ul li{
  font-size:15.5px;color:var(--text2);line-height:1.75;
  padding:5px 0 5px 20px;position:relative;
}
.proj-body ul li::before{
  content:'—';position:absolute;left:0;color:var(--text3);
  font-size:11px;top:10px;
}
.proj-body ul li strong{color:var(--text);font-weight:500}
code{
  font-family:ui-monospace,'SF Mono',Menlo,monospace;
  font-size:0.88em;background:var(--surface2);
  border:1px solid var(--border);border-radius:5px;
  padding:1px 5px;color:var(--text);
}

/* FIGURES */
figure{
  margin:32px 0;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:28px 24px 20px;
}
figure svg{display:block;max-width:100%;height:auto;margin:0 auto}
figcaption{
  font-size:13px;color:var(--text3);line-height:1.65;
  margin-top:20px;padding-top:16px;border-top:1px solid var(--border);
}
figcaption strong{color:var(--text2);font-weight:500}

/* TABLES */
.table-wrap{overflow-x:auto;margin:24px 0}
table{border-collapse:collapse;width:100%;font-size:14px;min-width:460px}
th,td{
  text-align:left;padding:11px 14px;
  border-bottom:1px solid var(--border);color:var(--text2);
  vertical-align:top;
}
th{
  font-size:11px;letter-spacing:0.08em;text-transform:uppercase;
  color:var(--text3);font-weight:500;
  border-bottom:1px solid var(--border2);
}
td strong{color:var(--text);font-weight:500}
tbody tr:last-child td{border-bottom:none}

/* STAT ROW */
.stat-row{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:12px;margin:24px 0;
}
.stat{
  background:var(--surface2);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:18px;
}
.stat-num{
  font-family:'Instrument Serif',serif;
  font-size:30px;letter-spacing:-0.02em;color:var(--text);line-height:1.1;
}
.stat-label{font-size:12px;color:var(--text3);margin-top:6px;line-height:1.5}

/* CALLOUT */
.callout{
  background:var(--surface2);border:1px solid var(--border);
  border-left:2px solid var(--accent-warm);
  border-radius:var(--radius);padding:18px 20px;margin:24px 0;
  max-width:720px;
}
.callout p{margin:0;font-size:14.5px;line-height:1.7}
.callout .callout-label{
  font-size:10px;letter-spacing:0.1em;text-transform:uppercase;
  color:var(--accent-warm);margin-bottom:7px;font-weight:500;
}

/* GALLERY */
.legend{display:flex;gap:18px;flex-wrap:wrap;margin:24px 0 8px}
.legend-item{
  display:inline-flex;align-items:center;gap:7px;
  font-size:12.5px;color:var(--text2);
}
.swatch{
  width:13px;height:13px;border-radius:3px;
  border:1px solid rgba(0,0,0,0.12);display:inline-block;
}
.gallery{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:16px;margin:20px 0 8px;
}
.gallery .shot{margin:0;padding:0;overflow:hidden;border-radius:var(--radius-lg)}
.gallery .shot img{
  display:block;width:100%;height:auto;
  border-bottom:1px solid var(--border);
}
.gallery .shot figcaption{
  margin:0;padding:14px 16px;border-top:none;
  font-size:12.5px;line-height:1.6;
}

/* INLINE BAR */
.bar{
  display:inline-block;height:9px;border-radius:99px;
  min-width:3px;vertical-align:middle;
}
td:last-child{width:40%;min-width:110px}

/* NEXT / FOOTER */
.proj-next{
  border-top:1px solid var(--border);
  max-width:900px;margin:0 auto;padding:40px 48px;
  display:flex;gap:12px;flex-wrap:wrap;
}
.btn-secondary{
  display:inline-flex;align-items:center;gap:8px;
  background:transparent;color:var(--text);
  padding:13px 26px;border-radius:99px;
  font-size:14px;text-decoration:none;
  border:1px solid var(--border2);
  transition:background 0.2s,border-color 0.2s;
}
.btn-secondary:hover{background:var(--surface2);border-color:var(--border)}
footer{
  padding:24px 48px;display:flex;justify-content:space-between;
  align-items:center;border-top:1px solid var(--border);
  font-size:12px;color:var(--text3);
}

/* FADE IN */
.fade-in{opacity:0;transform:translateY(16px);transition:opacity 0.6s ease,transform 0.6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* SVG DIAGRAM DEFAULTS */
.dgm{color:var(--text)}
.dgm text{font-family:'DM Sans',sans-serif;fill:currentColor}
.dgm .t-title{font-size:13px;font-weight:500}
.dgm .t-sub{font-size:11px;fill:var(--text2)}
.dgm .t-edge{font-size:10.5px;fill:var(--text3)}
.dgm .t-group{font-size:10px;letter-spacing:0.08em;fill:var(--text3)}
.dgm .box{fill:var(--surface);stroke:var(--border2);stroke-width:1}
.dgm .box-alt{fill:var(--surface2);stroke:var(--border2);stroke-width:1}
.dgm .box-key{fill:#FBF1E8;stroke:var(--accent-warm);stroke-width:1.4}
.dgm .box-hw{fill:#F2F4F1;stroke:#BFC9BE;stroke-width:1}
.dgm .edge{stroke:var(--text3);stroke-width:1.3;fill:none}
.dgm .edge-key{stroke:var(--accent-warm);stroke-width:1.6;fill:none}
.dgm .edge-dash{stroke:var(--text3);stroke-width:1.3;fill:none;stroke-dasharray:4 3}
.dgm .rule{stroke:var(--border2);stroke-width:1;fill:none}
.dgm .rule-iso{stroke:var(--accent-warm);stroke-width:1.2;fill:none;stroke-dasharray:6 4}

/* RESPONSIVE */
@media(max-width:768px){
  nav{padding:16px 20px}
  .nav-links{gap:18px}
  .proj-hero{padding:120px 20px 40px}
  .proj-body{padding:0 20px 60px}
  .proj-next{padding:32px 20px}
  .proj-title{font-size:36px}
  figure{padding:18px 14px 16px}
  /* Diagrams stay legible by scrolling rather than shrinking to unreadable text. */
  .dgm-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:6px}
  .dgm-wrap svg{min-width:680px}
  footer{padding:20px;flex-direction:column;gap:8px;text-align:center}
}
@media(max-width:520px){
  .nav-links a:not(.nav-cta){display:none}
}