/* =========================================================
   BLOCK HOUSE DESIGN | BUILD — shared stylesheet
   Tokens: ink / plaster / fog / slate / brick
========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Jost:wght@300;400;500&display=swap');

:root{
  --blue: #4998ca;        /* exact blue from the logo house */
  --blue-ink: #2d6d9b;    /* same blue, deepened for small text & footer (readable contrast) */
  --blue-tint: #eef5fb;
  --blue-line: #d3e5f3;
  --ink: #2b3640;
  --charcoal-70: #4f5a64;
  --charcoal-45: #6f7d89;
  --white: #ffffff;

  --plaster: #ffffff;
  --plaster-dim: var(--blue-tint);
  --fog: var(--blue-line);
  --slate: var(--blue);
  --brick: var(--blue);

  --font-display: 'Jost', sans-serif;
  --font-body: 'Jost', sans-serif;

  --nav-h: 88px;
  --max: 1400px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
html:focus-within{ scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body{
  margin: 0;
  background: var(--plaster);
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }

/* ---------- Utility type ---------- */
.eyebrow{
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--blue-ink);
  font-weight: 500;
}

.serif{ font-family: var(--font-display); }

h1, h2, h3{
  font-family: var(--font-display);
  font-weight: 300;
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  line-height: 1.2;
  color: var(--blue-ink);
}
/* sentence-length statements stay in sentence case so they read easily */
.serif{ font-weight: 300; }
p.serif, .statement p, .cta-band p, .phil-lede{
  text-transform: none;
  letter-spacing: 0.02em;
  font-style: normal;
}
.cap-title, .proj-title, .direct-block .big{
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.95rem !important;
  font-weight: 400;
  color: var(--ink);
}

/* ---------- Skip link (a11y) ---------- */
.skip-link{
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--blue-ink);
  color: #fff;
  padding: 12px 20px;
  z-index: 999;
}
.skip-link:focus{ left: 20px; top: 20px; }

/* ---------- Nav ---------- */
.site-nav{
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 4vw, 56px);
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-nav.is-solid{
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-color: var(--fog);
}
.site-nav{ color: var(--ink); }
.site-nav.on-dark{ color: #fff; }
.site-nav.on-dark .nav-links a{ color: #fff; }
.site-nav.on-dark.is-solid{ color: var(--ink); }
.site-nav.on-dark.is-solid .nav-links a{ color: var(--ink); }

.nav-mark{ display: flex; align-items: center; }
.nav-logo{ height: 46px; width: auto; transition: filter 0.3s var(--ease); }
.site-nav.on-dark:not(.is-solid) .nav-logo,
.footer-logo{ filter: brightness(0) invert(1); }
.footer-logo{ height: 54px; width: auto; margin-bottom: 20px; }

.nav-links{
  display: flex;
  gap: clamp(20px, 3vw, 44px);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.nav-links a{
  position: relative;
  font-weight: 400;
  padding-bottom: 4px;
}
.nav-links a::after{
  content: '';
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--blue);
  transition: right 0.35s var(--ease);
}
.nav-links a:hover::after,
.nav-links a.active::after{ right: 0; }

.nav-toggle{
  display: none;
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle svg{ width: 22px; height: 22px; }

@media (max-width: 760px){
  .nav-links{
    position: fixed;
    inset: 0;
    top: var(--nav-h);
    background: var(--plaster);
    flex-direction: column;
    align-items: flex-start;
    padding: 40px clamp(20px, 6vw, 56px);
    gap: 28px;
    font-size: 1.1rem;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
    color: var(--ink);
  }
  .nav-links.open{
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav-toggle{ display: block; }
}

/* ---------- Peak divider (signature element) ---------- */
.peak-divider{
  display: flex;
  justify-content: center;
  padding: 0;
  line-height: 0;
}
.peak-divider svg{ width: 46px; height: 26px; }
.peak-divider path{
  fill: none;
  stroke: var(--blue);
  stroke-width: 1.2;
}
.peak-divider.on-dark path{ stroke: rgba(246,243,238,0.5); }

/* ---------- Placeholder photo blocks ---------- */
.ph{
  position: relative;
  width: 100%;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.7), rgba(255,255,255,0) 45%),
    linear-gradient(155deg, var(--blue-line) 0%, #bcd9ee 55%, var(--blue) 160%);
  isolation: isolate;
}
.ph::before{
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(45,109,155,0.07) 1px, transparent 1px);
  background-size: 4px 4px;
  mix-blend-mode: multiply;
  opacity: 0.5;
}
.ph .ph-label{
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: var(--blue-ink);
  z-index: 2;
  pointer-events: none;
}
.ph .ph-label .mark{
  width: 34px; height: auto;
  margin: 0 auto 10px;
  opacity: 0.8;
}
.ph .ph-label .txt{
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--blue-ink);
}

/* ---------- Buttons ---------- */
.btn{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 32px;
  border: 1px solid var(--blue-ink);
  background: var(--blue-ink);
  color: #fff;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
}
.btn:hover{ background: transparent; color: var(--blue-ink); }
.btn.light{ border-color: #fff; background: transparent; color: #fff; }
.btn.light:hover{ background: #fff; color: var(--blue-ink); }
:focus-visible{ outline: 2px solid var(--blue); outline-offset: 3px; }

/* ---------- Footer ---------- */
.site-footer{
  background: var(--blue-ink);
  color: #fff;
  padding: 72px clamp(20px, 4vw, 56px) 30px;
}
.footer-grid{
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.25);
}
.footer-col h4{
  font-family: var(--font-body);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  margin-bottom: 18px;
  font-weight: 500;
}
.footer-col p, .footer-col a{
  display: block;
  font-size: 0.92rem;
  color: rgba(255,255,255,0.92);
  line-height: 2;
}
.footer-col a:hover{ color: #fff; text-decoration: underline; }
.footer-bottom{
  max-width: var(--max);
  margin: 0 auto;
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.8);
}

@media (max-width: 720px){
  .footer-grid{ grid-template-columns: 1fr; gap: 36px; }
}

/* ---------- Reveal-on-scroll ---------- */
.reveal{
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.is-visible{ opacity: 1; transform: translateY(0); }

/* ---------- Page header (for interior pages) ---------- */
.page-header{
  padding: calc(var(--nav-h) + 90px) clamp(20px, 4vw, 56px) 60px;
  max-width: var(--max);
  margin: 0 auto;
}
.page-header .eyebrow{ margin-bottom: 18px; }
.page-header h1{
  font-size: clamp(1.8rem, 4vw, 3rem);
  max-width: 22ch;
}
.page-header .lede{
  margin-top: 24px;
  max-width: 52ch;
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--charcoal-70);
}

/* ---------- Photos ---------- */
.ph > img.photo{
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: 1;
}
img[data-lightbox]{ cursor: zoom-in; }

.lightbox{
  position: fixed; inset: 0;
  background: rgba(20, 38, 52, 0.94);
  display: none;
  align-items: center; justify-content: center;
  z-index: 300;
  padding: 4vh 4vw;
}
.lightbox.open{ display: flex; }
.lightbox img{ max-width: 100%; max-height: 92vh; object-fit: contain; }
.lightbox button{
  position: absolute;
  background: none; border: none; color: #fff;
  font-family: var(--font-body); font-weight: 300;
  font-size: 2.2rem; line-height: 1;
  cursor: pointer; padding: 14px 18px;
  opacity: 0.85;
}
.lightbox button:hover{ opacity: 1; }
.lightbox .lb-close{ top: 10px; right: 10px; }
.lightbox .lb-prev{ left: 6px; top: 50%; transform: translateY(-50%); }
.lightbox .lb-next{ right: 6px; top: 50%; transform: translateY(-50%); }