/* =========================================================
   ROOFTOP — стратиграфічна система
   Дах як інженерна конструкція: сторінка читається як
   вертикальний розріз реального даху, шар за шаром.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,500;0,9..144,600;1,9..144,500&family=Space+Mono:wght@400;700&family=Work+Sans:wght@300;400;500;600&display=swap');

:root{
  /* --- шари (layer palette) --- */
  --sky:        #cfd9d2;
  --sky-deep:   #8fa39a;
  --moss:       #37432b;
  --moss-ink:   #232a1a;
  --soil:       #4f3c2a;
  --soil-ink:   #302318;
  --slate:      #3c464b;
  --slate-ink:  #262d31;
  --root:       #17140f;
  --concrete:   #8c8579;
  --concrete-ink: #57524a;

  --paper:      #f4efe4;
  --paper-dim:  #d9d2c2;
  --ink:        #17140f;
  --amber:      #dd9f4e;
  --amber-dim:  #b9843f;

  --display: 'Fraunces', serif;
  --mono: 'Space Mono', monospace;
  --body: 'Work Sans', sans-serif;

  --edge: 1px solid rgba(244,239,228,0.14);
  --rail-w: 64px;
}

*,*::before,*::after{ box-sizing: border-box; }

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

body{
  margin:0;
  font-family: var(--body);
  color: var(--paper);
  background: var(--root);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img{ max-width:100%; display:block; }
a{ color: inherit; }
h1,h2,h3{ font-family: var(--display); font-weight: 600; margin:0; }
p{ margin:0; }
button{ font-family: inherit; }

.container{
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* focus visibility */
a:focus-visible, button:focus-visible{
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

/* =========================================================
   CORE-SAMPLE RAIL — вертикальний зразок керну
   ========================================================= */
.core-rail{
  position: fixed;
  top: 0; left: 0;
  width: var(--rail-w);
  height: 100vh;
  z-index: 60;
  display: none;
  flex-direction: column;
  align-items: center;
  padding: 88px 0 24px;
  background: rgba(23,20,15,0.55);
  backdrop-filter: blur(6px);
  border-right: var(--edge);
}
@media (min-width: 980px){
  .core-rail{ display: flex; }
  body{ padding-left: var(--rail-w); }
}
.core-rail__track{
  position: relative;
  flex: 1;
  width: 2px;
  background: rgba(244,239,228,0.15);
  margin: 6px 0;
}
.core-rail__fill{
  position:absolute; top:0; left:0; width:100%;
  height: 0%;
  background: var(--amber);
  transition: height .25s ease-out;
}
.core-rail__labels{
  position: relative;
  height: 100%;
  width: 0;
}
.core-rail__step{
  position:absolute;
  left: 12px;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .06em;
  color: rgba(244,239,228,0.45);
  white-space: nowrap;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transition: color .2s ease;
}
.core-rail__step.is-active{ color: var(--paper); }
.core-rail__step.is-active::before{
  content:"";
  position:absolute;
  left:-9px; top:50%;
  width:6px; height:6px;
  border-radius:50%;
  background: var(--amber);
  writing-mode: horizontal-tb;
}

/* mobile top progress */
.top-progress{
  position: fixed; top:0; left:0; right:0; height:3px;
  background: rgba(244,239,228,0.12); z-index: 70;
}
.top-progress__bar{ height:100%; width:0%; background: var(--amber); }
@media (min-width: 980px){ .top-progress{ display:none; } }

/* =========================================================
   HEADER
   ========================================================= */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(23,20,15,0.72);
  backdrop-filter: blur(10px);
  border-bottom: var(--edge);
}
.site-header .container{
  display:flex; align-items:center; justify-content:space-between;
  height: 68px;
}
.logotype{
  font-family: var(--mono);
  font-weight:700;
  font-size: 15px;
  letter-spacing: .12em;
  text-decoration:none;
  color: var(--paper);
}
.logotype span{ color: var(--amber); }

.nav-toggle{
  display:flex; align-items:center; justify-content:center;
  width: 44px; height: 44px;
  background: transparent; border: var(--edge); border-radius: 3px;
  color: var(--paper);
  cursor:pointer;
}
.nav-toggle svg{ width:20px; height:20px; }
@media (min-width: 860px){ .nav-toggle{ display:none; } }

.site-nav{
  display: none;
  position: fixed;
  inset: 68px 0 0 0;
  background: var(--root);
  padding: 32px 24px;
  z-index: 45;
  overflow-y: auto;
}
.site-nav.is-open{ display:block; }
.site-nav ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap: 4px; }
.site-nav a{
  display:block;
  font-family: var(--display);
  font-size: 28px;
  padding: 14px 4px;
  text-decoration:none;
  border-bottom: var(--edge);
  color: var(--paper);
}
.site-nav .nav-cta{
  margin-top: 24px;
  display:inline-block;
}

@media (min-width: 860px){
  .site-nav{
    display:block;
    position: static;
    inset:auto;
    background: transparent;
    padding: 0;
    overflow: visible;
    width: auto;
  }
  .site-nav ul{ flex-direction: row; align-items:center; gap: 28px; }
  .site-nav a{
    font-family: var(--body);
    font-size: 14px;
    font-weight: 500;
    padding: 6px 0;
    border-bottom: none;
    opacity: .85;
  }
  .site-nav a:hover{ opacity: 1; color: var(--amber); }
  .site-nav .nav-cta{ margin-top:0; }
}

.btn{
  display:inline-flex; align-items:center; gap:8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  text-decoration:none;
  padding: 13px 20px;
  border-radius: 2px;
  border: 1px solid var(--amber);
  color: var(--ink);
  background: var(--amber);
  min-height: 44px;
  transition: background .18s ease, color .18s ease, transform .18s ease;
}
.btn:hover{ background: transparent; color: var(--amber); }
.btn--ghost{
  background: transparent; color: var(--paper); border-color: rgba(244,239,228,0.4);
}
.btn--ghost:hover{ border-color: var(--paper); color: var(--paper); background: rgba(244,239,228,0.08); }

/* =========================================================
   LAYER SECTION SCAFFOLD
   ========================================================= */
.layer{
  position: relative;
  padding: 88px 0 96px;
  border-bottom: var(--edge);
}
.layer--moss{ background: var(--moss); color: var(--paper); }
.layer--soil{ background: var(--soil); color: var(--paper); }
.layer--slate{ background: var(--slate); color: var(--paper); }
.layer--root{ background: var(--root); color: var(--paper); }
.layer--concrete{ background: var(--concrete); color: var(--ink); }

.layer__label{
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--amber);
  display:flex; align-items:center; gap:10px;
  margin-bottom: 20px;
}
.layer--concrete .layer__label{ color: var(--soil-ink); }
.layer__label::before{
  content:"";
  width: 26px; height:1px;
  background: currentColor;
}

.layer__heading{
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.06;
  max-width: 16ch;
  margin-bottom: 22px;
}
.layer--concrete .layer__heading{ color: var(--ink); }

.layer__lede{
  font-size: 18px;
  max-width: 56ch;
  opacity: .92;
  margin-bottom: 8px;
}

/* =========================================================
   HERO
   ========================================================= */
.hero{
  position: relative;
  min-height: 92vh;
  display:flex;
  align-items:flex-end;
  padding: 0;
  border-bottom: var(--edge);
  overflow:hidden;
}
.hero__media{
  position:absolute; inset:0;
}
.hero__media img{
  width:100%; height:100%; object-fit: cover; object-position: 55% 30%;
}
.hero__scrim{
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(23,20,15,0.15) 0%, rgba(23,20,15,0.35) 45%, rgba(23,20,15,0.92) 100%);
}
.hero__content{
  position: relative;
  z-index: 2;
  padding: 0 0 56px;
  width:100%;
}
.hero__eyebrow{
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 18px;
  display:block;
}
.hero__title{
  font-size: clamp(40px, 8.4vw, 92px);
  line-height: .98;
  max-width: 14ch;
  margin-bottom: 24px;
}
.hero__title em{ font-style: italic; color: var(--amber); font-weight: 500; }
.hero__lede{
  font-size: clamp(16px, 2vw, 19px);
  max-width: 46ch;
  color: var(--paper-dim);
  margin-bottom: 32px;
}
.hero__actions{ display:flex; flex-wrap:wrap; gap: 14px; }

.hero__scroll-cue{
  position:absolute;
  bottom: 20px; right: 24px;
  z-index:2;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing:.08em;
  color: var(--paper-dim);
  display:flex; align-items:center; gap:8px;
  writing-mode: vertical-rl;
}
.hero__scroll-cue::after{
  content:"";
  width:1px; height: 40px;
  background: var(--paper-dim);
}

/* =========================================================
   EVIDENCE / STRATA DIAGRAM (Layer 01)
   ========================================================= */
.evidence-grid{
  display:grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items:start;
}
@media (min-width: 860px){
  .evidence-grid{ grid-template-columns: 1.1fr .9fr; gap: 64px; }
}
.evidence-figure{ position:relative; }
.evidence-figure img{ border-radius: 2px; }
.evidence-figure figcaption{
  font-family: var(--mono);
  font-size: 12px;
  color: var(--paper-dim);
  margin-top: 12px;
  max-width: 42ch;
}
.strata-list{
  list-style:none; margin: 28px 0 0; padding:0;
  display:flex; flex-direction:column;
}
.strata-list li{
  display:grid; grid-template-columns: 34px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-top: var(--edge);
  align-items:baseline;
}
.strata-list li:last-child{ border-bottom: var(--edge); }
.strata-list .n{ font-family: var(--mono); font-size: 13px; color: var(--amber); }
.strata-list .t{ font-weight: 500; }
.strata-list .d{ display:block; font-size: 14.5px; opacity:.8; margin-top:4px; }

/* =========================================================
   TWO-SPACE SECTIONS (conference / garden)
   ========================================================= */
.space-block{
  display:grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
@media (min-width: 860px){
  .space-block{ grid-template-columns: repeat(12,1fr); gap: 28px; }
  .space-block__text{ grid-column: 1 / 6; align-self:center; }
  .space-block__media{ grid-column: 6 / 13; }
  .space-block--reverse .space-block__text{ grid-column: 8/13; order:2; }
  .space-block--reverse .space-block__media{ grid-column: 1/8; order:1; }
}
.space-block__media{
  display:grid; grid-template-columns: 1fr 1fr; gap: 12px;
}
.space-block__media img{ border-radius:2px; height:100%; object-fit:cover; }
.space-block__media .tall{ grid-row: span 2; }

.tag-list{
  display:flex; flex-wrap:wrap; gap:10px; margin-top: 24px;
}
.tag{
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing:.04em;
  text-transform:uppercase;
  padding: 7px 12px;
  border: var(--edge);
  border-radius: 2px;
  color: var(--paper-dim);
}

/* =========================================================
   GALLERY (Layer 04)
   ========================================================= */
.gallery{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
@media (min-width: 700px){
  .gallery{ grid-template-columns: repeat(4, 1fr); }
  .gallery img{ height: 100%; }
}
.gallery figure{ margin:0; position:relative; overflow:hidden; border-radius:2px; aspect-ratio: 3/4;}
.gallery img{ width:100%; height:100%; object-fit:cover; transition: transform .5s ease; }
.gallery figure:hover img{ transform: scale(1.05); }
.gallery figcaption{
  position:absolute; left:0; right:0; bottom:0;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--paper);
  background: linear-gradient(0deg, rgba(0,0,0,.7), transparent);
}

/* =========================================================
   LOCATION (Layer 05, concrete)
   ========================================================= */
.location-grid{
  display:grid; grid-template-columns: 1fr; gap: 40px;
}
@media (min-width: 860px){ .location-grid{ grid-template-columns: 1fr 1fr; gap: 64px; } }
.location-address{
  font-family: var(--display);
  font-size: 22px;
  margin: 4px 0 18px;
}
.location-meta{ font-size: 15px; opacity:.85; max-width: 46ch; }
.formats-list{
  margin-top: 28px;
  display:flex; flex-wrap:wrap; gap: 10px 12px;
  padding:0; list-style:none;
}
.formats-list li{
  font-family: var(--mono);
  font-size: 12px;
  padding: 8px 12px;
  border: 1px solid rgba(23,20,15,0.25);
  border-radius: 2px;
}
.map-frame{
  border: 1px solid rgba(23,20,15,0.25);
  padding: 22px;
  border-radius: 2px;
  background: rgba(244,239,228,0.35);
}
.map-frame__coords{ font-family: var(--mono); font-size: 12px; opacity: .7; }

/* =========================================================
   CONTACT / FOOTER
   ========================================================= */
.contact{
  padding: 96px 0 40px;
  background: var(--root);
}
.contact__inner{
  text-align:left;
}
.contact__heading{
  font-size: clamp(34px, 6vw, 64px);
  max-width: 14ch;
  margin-bottom: 20px;
}
.contact__lede{
  max-width: 50ch;
  color: var(--paper-dim);
  font-size: 17px;
  margin-bottom: 32px;
}
.contact__actions{ display:flex; flex-wrap:wrap; gap:14px; margin-bottom: 80px; }

.site-footer{
  border-top: var(--edge);
  padding-top: 28px;
  display:flex; flex-wrap:wrap; gap: 16px;
  justify-content:space-between; align-items:center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--paper-dim);
}
.site-footer a{ text-decoration:none; }
.site-footer a:hover{ color: var(--amber); }
.footer-nav{ display:flex; gap: 18px; flex-wrap:wrap; list-style:none; padding:0; margin:0; }

/* reveal-on-scroll */
.reveal{
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.is-visible{ opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce){
  .reveal{ opacity:1; transform:none; }
}