/* ==========================================================
   Alapkő Építőipari Kft. — referencia weboldal
   Design tokens
   ========================================================== */
:root{
  --ink:        #181b1e;
  --concrete:   #75726a;
  --concrete-l: #d6d2c6;
  --paper:      #f2efe6;
  --paper-2:    #e6e2d4;
  --steel:      #3c6484;
  --blueprint:      #1f4d6b;
  --blueprint-l:    #3f80ab;
  --mortar:     #3f6b52;
  --mortar-l:   #74a884;
  --white:      #fbfaf6;

  --font-display: "Big Shoulders Display", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  --radius: 2px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

*{ box-sizing: border-box; margin:0; padding:0;}
html{ scroll-behavior: smooth; }
body{
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration:none; }
ul{ list-style:none; }
.wrap{
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 32px;
}
.mono{ font-family: var(--font-mono); letter-spacing: 0.02em; }
.ink{ color: var(--mortar); }

h1,h2,h3{
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}
h1{ font-size: clamp(2.6rem, 7vw, 5.4rem); }
h2{ font-size: clamp(2rem, 4.6vw, 3.4rem); margin-bottom: 20px; }
h3{ font-size: 1.15rem; text-transform: none; letter-spacing: 0; font-weight: 700; margin-bottom: 8px;}

.eyebrow{
  font-size: 0.78rem;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 14px;
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{
  content:"";
  width: 24px;
  height: 2px;
  background: var(--mortar);
  display:inline-block;
}
.section-lead{
  max-width: 620px;
  color: #45443f;
  font-size: 1.02rem;
  margin-bottom: 44px;
}

/* subtle grain overlay for texture, cheap and static */
.grain{
  position: fixed;
  inset:0;
  pointer-events:none;
  z-index: 500;
  opacity: 0.035;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* ---------------- Buttons ---------------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding: 15px 28px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  cursor:pointer;
  transition: transform .25s var(--ease), background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
.btn-primary{
  background: var(--blueprint);
  color: var(--white);
}
.btn-primary:hover{ background: var(--blueprint-l); transform: translateY(-2px); }
.btn-ghost{
  border-color: var(--ink);
  color: var(--ink);
}
.btn-ghost:hover{ background: var(--ink); color: var(--white); transform: translateY(-2px); }
.btn-block{ width: 100%; justify-content: center; }

/* ---------------- Header ---------------- */
.site-header{
  position: sticky;
  top:0;
  z-index: 100;
  background: rgba(242,239,230,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(24,27,30,0.1);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height: 82px;
}
.logo{ display:flex; align-items:center; gap:12px; }
.logo-mark{
  font-family: var(--font-display);
  background: var(--ink);
  color: var(--white);
  font-weight:800;
  width: 42px; height: 42px;
  display:flex; align-items:center; justify-content:center;
  font-size: 1.1rem;
}
.logo-text{
  font-family: var(--font-display);
  font-weight:700;
  font-size: 1.15rem;
  text-transform: uppercase;
  line-height:1;
  display:flex; flex-direction:column;
}
.logo-text em{
  font-family: var(--font-body);
  font-style: normal;
  font-weight: 500;
  text-transform:none;
  font-size: 0.68rem;
  color: var(--concrete);
  letter-spacing: 0.03em;
  margin-top:2px;
}
.main-nav{ display:flex; align-items:center; gap:34px; }
.main-nav a{
  font-size: 0.92rem;
  font-weight: 500;
  position: relative;
}
.main-nav a:not(.nav-cta)::after{
  content:"";
  position:absolute; left:0; bottom:-6px;
  width:0; height:2px;
  background: var(--blueprint);
  transition: width .25s var(--ease);
}
.main-nav a:not(.nav-cta):hover::after{ width:100%; }
.nav-cta{
  background: var(--ink);
  color: var(--white);
  padding: 10px 20px;
  border-radius: var(--radius);
}
.nav-cta:hover{ background: var(--blueprint); }
.nav-toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  background:none; border:none; cursor:pointer;
  padding: 8px;
}
.nav-toggle span{ width:24px; height:2px; background:var(--ink); }

/* ---------------- Hero ---------------- */
.hero{
  position:relative;
  height: 92vh;
  min-height: 560px;
  display:flex;
  align-items:flex-end;
  overflow:hidden;
  color: var(--white);
}
.hero-media{ position:absolute; inset:0; z-index:0; }
.hero-media img{
  width:100%; height:100%; object-fit:cover; object-position: center;
  filter: saturate(0.9) brightness(0.7);
}
.hero-gradient{
  position:absolute; inset:0;
  background:
    linear-gradient(0deg, rgba(15,17,19,0.94) 0%, rgba(15,17,19,0.55) 42%, rgba(15,17,19,0.12) 68%, rgba(15,17,19,0.32) 100%);
}
.hero-inner{
  position:relative; z-index:2;
  padding-bottom: 90px;
  padding-top: 40px;
}
.hero .eyebrow{ color: rgba(251,250,246,0.92); }
.hero .eyebrow::before{ background: var(--mortar-l); }
.hero-lead{
  max-width: 540px;
  font-size: 1.08rem;
  margin: 22px 0 34px;
  color: rgba(251,250,246,0.86);
}
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; }
.hero-actions .btn-ghost{ border-color: var(--white); color: var(--white); }
.hero-actions .btn-ghost:hover{ background: var(--white); color: var(--ink); }
.hero-tag{
  position:absolute;
  top: 26px; right: 32px;
  z-index:2;
  font-size: 0.72rem;
  color: rgba(251,250,246,0.75);
  border: 1px solid rgba(251,250,246,0.4);
  padding: 6px 12px;
}

/* ---------------- Stats ---------------- */
.stats{
  background: var(--ink);
  color: var(--white);
  padding: 44px 0;
}
.stats-grid{
  display:grid;
  grid-template-columns: repeat(3,1fr);
  gap: 24px;
}
.stat{ display:flex; flex-direction:column; }
.stat-value{ display:flex; align-items:baseline; }
.stat-num{ font-size: 2.6rem; font-weight:600; display:inline-block; }
.stat-suffix{ font-size: 1.8rem; font-weight:600; color: var(--mortar-l); margin-left: 2px; }
.stat-label{
  font-size: 0.82rem;
  color: rgba(251,250,246,0.65);
  margin-top: 6px;
  max-width: 180px;
}

/* ---------------- Services ---------------- */
.services{ padding: 110px 0; }

/* ---- Interactive tabbed service explorer ---- */
.services-explorer{
  display:grid;
  grid-template-columns: 320px 1fr;
  gap: 0;
  margin-top: 54px;
  border: 1px solid rgba(24,27,30,0.15);
  background: var(--white);
  min-height: 460px;
}
.services-nav{
  display:flex;
  flex-direction:column;
  border-right: 1px solid rgba(24,27,30,0.15);
  background: var(--paper-2);
}
.service-nav-item{
  display:flex;
  align-items:baseline;
  gap: 16px;
  text-align:left;
  background:none;
  border:none;
  border-bottom: 1px solid rgba(24,27,30,0.12);
  padding: 20px 24px;
  cursor:pointer;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  position:relative;
  transition: background .25s var(--ease), padding-left .25s var(--ease);
}
.service-nav-item:last-child{ border-bottom:none; }
.service-nav-num{
  font-size: 0.78rem;
  color: var(--concrete);
  flex-shrink:0;
  transition: color .25s var(--ease);
}
.service-nav-item::before{
  content:"";
  position:absolute; left:0; top:0; bottom:0;
  width: 3px;
  background: var(--blueprint);
  transform: scaleY(0);
  transition: transform .25s var(--ease);
}
.service-nav-item:hover{ background: var(--paper); padding-left: 30px; }
.service-nav-item.active{ background: var(--white); }
.service-nav-item.active::before{ transform: scaleY(1); }
.service-nav-item.active .service-nav-num{ color: var(--blueprint); }

.services-panel{ position:relative; }
.service-detail{
  display:none;
  grid-template-columns: 108px 1fr 260px;
  gap: 36px;
  padding: 44px;
  align-items:start;
  animation: panelFade .4s var(--ease);
}
.service-detail.active{ display:grid; }
@keyframes panelFade{
  from{ opacity:0; transform: translateX(8px); }
  to{ opacity:1; transform: translateX(0); }
}
.service-icon{
  width: 92px; height: 92px;
  border: 1px solid rgba(24,27,30,0.15);
  display:flex; align-items:center; justify-content:center;
  color: var(--blueprint);
  flex-shrink:0;
}
.service-icon svg{ width: 50px; height:50px; }
.service-detail-num{
  display:block;
  font-size: 0.76rem;
  color: var(--steel);
  margin-bottom: 12px;
}
.service-copy h3{ text-transform:none; font-size: 1.4rem; margin-bottom: 14px; }
.service-copy p{ color:#4c4b45; font-size: 0.98rem; margin-bottom: 20px; max-width: 480px; }
.service-detail-list{ display:flex; flex-direction:column; gap: 10px; }
.service-detail-list li{
  font-size: 0.92rem;
  color: var(--ink);
  padding-left: 22px;
  position:relative;
}
.service-detail-list li::before{
  content:"—";
  position:absolute; left:0; top:0;
  color: var(--mortar);
}
.service-detail-media{
  position:relative;
  aspect-ratio: 3/4;
  overflow:hidden;
  border: 1px solid rgba(24,27,30,0.15);
}
.service-detail-media img{ width:100%; height:100%; object-fit:cover; }
.service-detail-media::before,
.service-detail-media::after{
  content:"";
  position:absolute;
  width: 16px; height: 16px;
  border: 1.5px solid var(--white);
  pointer-events:none;
  z-index:2;
}
.service-detail-media::before{ top:8px; left:8px; border-right:none; border-bottom:none; }
.service-detail-media::after{ bottom:8px; right:8px; border-left:none; border-top:none; }
.service-detail-tag{
  position:absolute;
  bottom: 10px; left:10px;
  z-index:2;
  font-size: 0.65rem;
  color: var(--white);
  background: rgba(24,27,30,0.62);
  padding: 4px 8px;
}

/* ---------------- Portfolio ---------------- */
.portfolio{ padding: 110px 0; background: var(--paper-2); }
.filters{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
  margin-bottom: 44px;
}
.filter-btn{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: none;
  border: 1px solid var(--concrete);
  color: var(--ink);
  padding: 9px 16px;
  cursor:pointer;
  border-radius: var(--radius);
  transition: all .25s var(--ease);
  text-transform: uppercase;
}
.filter-btn:hover{ border-color: var(--blueprint); color: var(--blueprint); }
.filter-btn.active{ background: var(--ink); border-color: var(--ink); color: var(--white); }

.gallery{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.gallery-item{
  background: var(--white);
  border: 1px solid rgba(24,27,30,0.1);
  overflow:hidden;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.gallery-item.in-view{ opacity:1; transform: translateY(0); }
.gallery-item.hide{ display:none; }
.gallery-media{
  position:relative;
  aspect-ratio: 4/3;
  overflow:hidden;
  cursor: zoom-in;
}
.gallery-media img{
  width:100%; height:100%; object-fit:cover;
  transition: transform .5s var(--ease);
}
.gallery-media:hover img{ transform: scale(1.06); }
.gallery-item figcaption{ padding: 22px 22px 26px; }
.sheet{
  display:block;
  font-size: 0.72rem;
  color: var(--steel);
  margin-bottom: 10px;
}
.gallery-item h3{ font-size: 1.02rem; }
.gallery-item p{ font-size: 0.9rem; color: #55534c; }

/* ---------------- Process ---------------- */
.process{ padding: 110px 0; }
.process-track{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 2px solid var(--ink);
  margin-top: 50px;
}
.process-step{
  padding: 28px 22px 0;
  border-right: 1px solid rgba(24,27,30,0.15);
  position: relative;
}
.process-step:last-child{ border-right:none; }
.process-step::before{
  content:"";
  position:absolute;
  top:-2px; left:0;
  width: 0%;
  height: 2px;
  background: var(--blueprint);
  transition: width .6s var(--ease);
}
.process-step.in-view::before{ width:100%; }
.process-step-num{
  font-size: 0.74rem;
  color: var(--mortar);
  display:block;
  margin-bottom: 14px;
}
.process-step p{ font-size: 0.9rem; color:#4c4b45; }

/* ---------------- About ---------------- */
.about{ padding: 110px 0; background: var(--ink); color: var(--white); }
.about-grid{
  display:grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 70px;
  align-items:center;
}
.about-text p{ color: rgba(251,250,246,0.78); margin-bottom: 24px; max-width: 520px;}
.about-list li{
  padding: 14px 0;
  border-top: 1px solid rgba(251,250,246,0.18);
  font-size: 0.95rem;
  color: rgba(251,250,246,0.85);
}
.about-list li:last-child{ border-bottom: 1px solid rgba(251,250,246,0.18); }
.about-list strong{ color: var(--mortar-l); }
.about-media img{ border: 1px solid rgba(251,250,246,0.2); }

/* ---------------- Contact ---------------- */
.contact{ padding: 110px 0; }
.contact-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
}
.contact-info p{ color:#45443f; max-width: 440px; margin-bottom: 30px; }
.contact-detail{
  display:flex;
  gap: 16px;
  align-items:baseline;
  padding: 14px 0;
  border-top: 1px solid rgba(24,27,30,0.15);
}
.contact-detail span.mono{ font-size:0.74rem; color: var(--steel); width: 70px; flex-shrink:0; }
.contact-detail a{ font-weight:600; }
.contact-detail a:hover{ color: var(--blueprint); }
.contact-form{
  background: var(--white);
  border: 1px solid rgba(24,27,30,0.12);
  padding: 36px;
  display:flex;
  flex-direction:column;
  gap: 18px;
}
.contact-form label{ display:flex; flex-direction:column; gap:8px; font-size:0.85rem; font-weight:600; }
.contact-form input, .contact-form select, .contact-form textarea{
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 12px 14px;
  border: 1px solid var(--concrete-l);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  resize: vertical;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus{
  outline: 2px solid var(--steel);
  outline-offset: 1px;
}
.form-note{ font-size:0.85rem; color: var(--steel); min-height: 1.2em; }

/* ---------------- Footer ---------------- */
.site-footer{ background: var(--ink); color: rgba(251,250,246,0.7); padding: 40px 0; }
.footer-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap: 18px;
}
.footer-brand{ display:flex; align-items:center; gap:12px; font-weight:600; color:var(--white); }
.footer-credit{ font-size: 0.85rem; max-width: 420px; }
.footer-credit a{ color: var(--mortar-l); font-weight:600; text-decoration: underline; }
.footer-copy{ font-size: 0.74rem; width:100%; text-align:center; margin-top: 14px; opacity:0.6;}

/* ---------------- Lightbox ---------------- */
.lightbox{
  position: fixed; inset:0; z-index: 1000;
  background: rgba(15,16,14,0.94);
  display:none;
  align-items:center;
  justify-content:center;
  flex-direction: column;
  gap: 14px;
  padding: 40px;
}
.lightbox.open{ display:flex; }
.lightbox img{ max-height: 78vh; max-width: 90vw; object-fit:contain; border: 1px solid rgba(255,255,255,0.15); }
.lightbox-caption{ color: rgba(255,255,255,0.7); font-size: 0.8rem; }
.lightbox-close{
  position:absolute; top: 26px; right: 32px;
  background:none; border:1px solid rgba(255,255,255,0.4); color:#fff;
  width:40px; height:40px; cursor:pointer; font-size:1.1rem;
}

/* ---------------- Reveal-on-scroll ---------------- */
.reveal{ opacity:0; transform: translateY(24px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in-view{ opacity:1; transform:translateY(0); }

@media (prefers-reduced-motion: reduce){
  *{ transition: none !important; }
}

/* ---------------- Responsive ---------------- */
@media (max-width: 980px){
  .services-explorer{ grid-template-columns: 1fr; }
  .services-nav{ border-right:none; border-bottom: 1px solid rgba(24,27,30,0.15); flex-direction:row; flex-wrap:wrap; }
  .service-nav-item{ border-bottom:none; border-right: 1px solid rgba(24,27,30,0.12); padding: 14px 16px; }
  .service-nav-item::before{ left:0; right:0; top:auto; bottom:0; width:auto; height:3px; transform: scaleX(0); }
  .service-nav-item.active::before{ transform: scaleX(1); }
  .service-detail{ grid-template-columns: 1fr; padding: 32px 26px; }
  .service-detail-media{ aspect-ratio: 16/9; order: -1; }
  .gallery{ grid-template-columns: repeat(2,1fr); }
  .process-track{ grid-template-columns: repeat(2,1fr); }
  .about-grid, .contact-grid{ grid-template-columns: 1fr; gap: 40px; }
  .stats-grid{ grid-template-columns: repeat(3,1fr); row-gap: 30px; }
}

@media (max-width: 720px){
  .main-nav{
    position:fixed;
    top: 82px; left:0; right:0;
    background: var(--paper);
    flex-direction:column;
    align-items:flex-start;
    gap: 0;
    padding: 10px 24px 26px;
    border-bottom: 1px solid rgba(24,27,30,0.1);
    transform: translateY(-130%);
    transition: transform .35s var(--ease);
  }
  .main-nav.open{ transform: translateY(0); }
  .main-nav a{ width:100%; padding: 14px 0; border-bottom: 1px solid rgba(24,27,30,0.08); }
  .nav-cta{ margin-top: 10px; text-align:center; }
  .nav-toggle{ display:flex; }
  .service-icon{ width:76px; height:76px; }
  .service-icon svg{ width:40px; height:40px; }
  .gallery{ grid-template-columns: 1fr; }
  .process-track{ grid-template-columns: 1fr; }
  .stats-grid{ grid-template-columns: repeat(3,1fr); gap: 14px; }
  .stat-num{ font-size: 1.9rem; }
  .stat-suffix{ font-size: 1.3rem; }
  .hero{ align-items:center; text-align:left; }
  .hero-tag{ display:none; }
}