/*
  Studnářství Petráň — design systém
  Motiv: kapka vody (zadal klient) + doplňkový motiv hloubkové rysky (vrtná souprava / měřicí pásmo).
  Paleta: hluboká studniční modř + vápencový kámen + měděná/rezavá CTA (pažnice, staré pumpy) — vědomě mimo
  generický modro-fialový gradient a glassmorphism.
*/

/* Fonts (Zilla Slab / Karla) are loaded via <link> in index.html <head> for performance — not @import. */

:root{
  --bg:#f3efe6;
  --bg-alt:#eae3d3;
  --surface:#ffffff;
  --fg:#1b2a2e;
  --muted:#495a5e;
  --line:#d9d0ba;

  --well-900:#0c262e;
  --well-800:#123844;
  --well-600:#1f5566;

  --drop:#2f8fa6;
  --drop-soft:#bfe0e8;

  --accent:#98501d;
  --accent-dark:#7d4118;
  --accent-fg:#fff8f0;

  --font-heading:'Zilla Slab', Georgia, 'Times New Roman', serif;
  --font-body:'Karla', system-ui, -apple-system, sans-serif;

  --container:1120px;
  --pad:24px;
  --space-xs:8px; --space-sm:16px; --space-md:32px;
  --space-lg:64px; --space-xl:100px;

  --radius:3px;

  --ease:cubic-bezier(.33,1,.68,1);
  --dur-fast:150ms;
  --dur:250ms;
  --dur-slow:450ms;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--fg);
  background:var(--bg);
  line-height:1.6;
  font-size:16px;
}
h1,h2,h3{font-family:var(--font-heading); font-weight:600; margin:0 0 var(--space-sm); line-height:1.15; color:var(--well-900);}
h1{font-size:clamp(2.1rem,4.6vw,3.4rem); font-weight:700;}
h2{font-size:clamp(1.6rem,3vw,2.1rem);}
h3{font-size:1.05rem; font-weight:700;}
p{margin:0 0 var(--space-sm); color:var(--muted); max-width:62ch;}
a{color:var(--well-600);}
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, .pill:focus-visible{
  outline:3px solid var(--drop); outline-offset:2px;
}
img{max-width:100%; display:block;}
.container{max-width:var(--container); margin:0 auto; padding:0 var(--pad);}
.section{padding:var(--space-xl) 0; border-top:1px solid var(--line);}

.skip-link{
  position:absolute; left:-9999px; top:0; background:var(--well-900); color:#fff;
  padding:10px 18px; z-index:200; border-radius:0 0 var(--radius) 0;
}
.skip-link:focus{left:0;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:14px 28px; border-radius:var(--radius); font-weight:700; text-decoration:none;
  border:2px solid transparent; font-size:.95rem; font-family:var(--font-body);
  cursor:pointer; transition:transform var(--dur-fast) var(--ease), background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.btn-primary{background:var(--accent); color:var(--accent-fg); border-color:var(--accent);}
.btn-primary:hover{background:var(--accent-dark); border-color:var(--accent-dark); box-shadow:0 8px 18px rgba(125,65,24,.3); transform:translateY(-2px);}
.btn-secondary{background:transparent; color:inherit; border-color:currentColor;}
.btn-secondary:hover{background:rgba(255,255,255,.08); transform:translateY(-2px);}
.btn:active{transform:translateY(0);}
.cta-row{display:flex; gap:var(--space-sm); flex-wrap:wrap;}

/* ---------- water-drop icon (signature motif) ---------- */
.drop-icon{width:1em; height:1em; fill:currentColor; flex-shrink:0;}
.value-grid .drop-icon, .text-card .drop-icon{width:26px; height:26px; color:var(--drop); margin-bottom:var(--space-xs);}

/* ---------- depth-tick motif (secondary, next to H2) ---------- */
.section h2{position:relative; padding-left:34px;}
.section h2::before{
  content:"";
  position:absolute; left:0; top:.15em; bottom:.35em; width:14px;
  background-image:repeating-linear-gradient(to bottom, var(--well-600) 0 2px, transparent 2px 10px);
  opacity:.7;
}

/* ---------- HEADER ---------- */
header.site{
  position:sticky; top:0; z-index:50; background:var(--bg);
  display:flex; align-items:center; justify-content:space-between;
  padding:14px var(--pad); border-bottom:1px solid var(--line);
  box-shadow:0 0 0 rgba(12,38,46,0);
  transition:box-shadow var(--dur) var(--ease);
}
header.site.is-scrolled{box-shadow:0 6px 18px rgba(12,38,46,.12);}
.wordmark{display:flex; align-items:center; gap:8px; text-decoration:none; color:var(--well-900); font-family:var(--font-heading); font-weight:700; font-size:1.15rem;}
.wordmark .logo-mark{height:42px; width:auto; aspect-ratio:383/540; --logo-light:var(--well-900); flex-shrink:0; transition:transform var(--dur) var(--ease);}
.wordmark:hover .logo-mark{transform:translateY(-2px) scale(1.06);}
header.site .wordmark{margin-left:clamp(0px,2.5vw,40px);}
footer.site .wordmark .logo-mark{height:52px; --logo-light:#fff;}
header.site nav.desktop-nav{display:flex; gap:var(--space-md); flex-wrap:wrap;}
header.site nav.desktop-nav a{position:relative; text-decoration:none; font-weight:600; font-size:.95rem; color:var(--fg); padding-bottom:3px; transition:color var(--dur) var(--ease);}
header.site nav.desktop-nav a::after{
  content:""; position:absolute; left:0; right:100%; bottom:0; height:2px; background:var(--drop);
  transition:right var(--dur) var(--ease);
}
header.site nav.desktop-nav a:hover{color:var(--drop);}
header.site nav.desktop-nav a:hover::after, header.site nav.desktop-nav a:focus-visible::after{right:0;}
header.site .nav-cta{display:flex; align-items:center; gap:var(--space-md);}

.header-email{display:none; align-items:center; gap:6px; text-decoration:none; font-weight:700; font-size:.95rem; color:var(--well-900); white-space:nowrap;}
.header-email .drop-icon{width:18px; height:18px; color:var(--accent);}
@media (min-width:861px){ .header-email{display:inline-flex;} }

.hamburger{display:none; background:none; border:0; padding:8px; cursor:pointer;}
.hamburger span{display:block; width:24px; height:2px; background:var(--well-900); margin:5px 0;}

.mobile-drawer{
  position:fixed; inset:0 0 0 auto; width:min(78vw,320px); background:var(--surface);
  transform:translateX(100%); transition:transform .22s ease; z-index:100;
  box-shadow:-8px 0 24px rgba(0,0,0,.15); padding:var(--space-md);
  display:flex; flex-direction:column; gap:var(--space-md);
}
.mobile-drawer.open{transform:translateX(0);}
.mobile-drawer nav{display:flex; flex-direction:column; gap:var(--space-sm);}
.mobile-drawer a{text-decoration:none; color:var(--fg); font-weight:700; font-size:1.1rem;}
.drawer-close{align-self:flex-end; background:none; border:0; font-size:1.6rem; cursor:pointer; color:var(--muted);}
.drawer-backdrop{position:fixed; inset:0; background:rgba(12,38,46,.45); z-index:90; opacity:0; pointer-events:none; transition:opacity .2s ease;}
.drawer-backdrop.open{opacity:1; pointer-events:auto;}

/* ---------- HERO ---------- */
.hero{position:relative; min-height:76vh; display:flex; align-items:flex-end; color:#fff; overflow:hidden;}
.hero-bg{
  position:absolute; inset:0;
  background:
    linear-gradient(180deg, rgba(7,26,32,.5) 0%, rgba(7,26,32,.72) 55%, rgba(7,26,32,.92) 100%),
    radial-gradient(circle at 50% 42%, rgba(47,143,166,.25), transparent 45%),
    url("images/gallery/studna-02.jpg") center 38%/cover no-repeat;
}
.hero .container{position:relative; z-index:1; padding-bottom:var(--space-xl);}
.hero h1{color:#fff; max-width:760px;}
.hero p.lead{color:#dfeaec; max-width:520px; font-size:1.05rem;}
.stat-strip{display:flex; gap:var(--space-lg); margin-top:var(--space-lg); flex-wrap:wrap;}
.stat-strip .stat{display:flex; align-items:center; gap:8px;}
.stat-strip .num{font-family:var(--font-heading); font-size:1.7rem; font-weight:700; color:#fff;}
.stat-strip .label{font-size:.85rem; color:#c9dade;}
.stat-strip .drop-icon{width:20px; height:20px; color:var(--drop-soft);}

.ripple-divider{display:block; width:100%; height:22px; color:var(--well-900);}

/* ---------- STICKY CALL CTA (mobile) ---------- */
.sticky-call{
  position:fixed; left:12px; right:12px; bottom:12px; z-index:60;
  display:flex; align-items:center; justify-content:center; gap:10px;
  background:var(--accent); color:var(--accent-fg); text-decoration:none;
  padding:14px 20px; border-radius:var(--radius); font-size:.95rem;
  box-shadow:0 6px 18px rgba(0,0,0,.28);
}
.sticky-call:hover{background:var(--accent-dark);}
.sticky-call strong{font-family:var(--font-heading);}
@media (min-width:861px){ .sticky-call{display:none;} }

/* ---------- ABOUT / VALUE GRID ---------- */
.value-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:var(--space-md); margin:var(--space-md) 0 var(--space-lg);}
.value-grid h3{margin-bottom:4px; font-size:1rem;}
.value-grid p{font-size:.92rem; margin:0;}
.value-grid > div{
  opacity:0; transform:translateY(18px);
  transition:opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}
.value-grid > div.is-visible{opacity:1; transform:translateY(0);}
.value-grid > div:nth-child(2){transition-delay:.08s;}
.value-grid > div:nth-child(3){transition-delay:.16s;}
.value-grid > div:nth-child(4){transition-delay:.24s;}

.photo-placeholder{
  background:
    repeating-radial-gradient(circle at 30% 30%, rgba(0,0,0,.05) 0 2px, transparent 2px 18px),
    #ddd6c6;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  gap:8px; color:#7a7261; text-align:center; padding:var(--space-sm);
}
.photo-placeholder svg{width:34px; height:34px; opacity:.6;}
.photo-placeholder span{font-size:.8rem; max-width:26ch;}
.about-photo{aspect-ratio:16/9; overflow:hidden; border-radius:var(--radius);}
.about-photo img{width:100%; height:100%; object-fit:cover; object-position:center 42%; display:block;}

/* ---------- SERVICES ---------- */
.text-card-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:var(--space-md);}
.text-card{padding:var(--space-sm) var(--space-sm) var(--space-sm) 0; border-left:3px solid var(--line);}
.text-card.placeholder-card{border-left-style:dashed; color:var(--muted);}
.text-card.placeholder-card h3{color:var(--muted);}
.text-card h3{margin-bottom:4px;}
.text-card p{font-size:.95rem; margin:0;}
.text-card-grid > .text-card{
  opacity:0; transform:translateY(18px);
  transition:opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}
.text-card-grid > .text-card.is-visible{opacity:1; transform:translateY(0);}
.text-card-grid > .text-card:nth-child(2){transition-delay:.08s;}
.text-card-grid > .text-card:nth-child(3){transition-delay:.16s;}
.text-card-grid > .text-card:nth-child(4){transition-delay:.24s;}

/* ---------- PROCES ---------- */
.process-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:var(--space-md);}
.process-step{
  opacity:0; transform:translateX(-32px);
  transition:opacity .4s ease, transform .4s ease;
}
.process-step.is-visible{opacity:1; transform:translateX(0);}
.process-step:nth-child(2){transition-delay:.3s;}
.process-step:nth-child(3){transition-delay:.6s;}
.process-step:nth-child(4){transition-delay:.9s;}
.step-num{
  display:flex; align-items:center; justify-content:center;
  width:36px; height:36px; border-radius:50%; background:var(--well-900); color:#fff;
  font-family:var(--font-heading); font-weight:700; margin-bottom:var(--space-xs);
}
.process-step h3{margin-bottom:4px;}
.process-step p{font-size:.92rem; margin:0;}

/* ---------- GALLERY ---------- */
.media-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:10px; margin-bottom:var(--space-md);}
.media-grid .img{aspect-ratio:1/1; overflow:hidden; border-radius:var(--radius);}
.media-grid .img img{width:100%; height:100%; object-fit:cover; display:block;}
.gallery-item{border:0; margin:0; padding:0; font:inherit; width:100%; cursor:pointer; appearance:none; background:none;}
.gallery-item:focus-visible{outline:2px solid var(--well-900); outline-offset:2px;}
.media-grid > .gallery-item{
  opacity:0; transform:translateY(18px);
  transition:opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}
.media-grid > .gallery-item.is-visible{
  opacity:1; transform:translateY(0);
  transition:opacity var(--dur-slow) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.media-grid > .gallery-item.is-visible:hover, .media-grid > .gallery-item.is-visible:focus-visible{
  transform:translateY(-4px); box-shadow:0 12px 26px rgba(12,38,46,.2);
}
.media-grid > .gallery-item:nth-child(2){transition-delay:.05s;}
.media-grid > .gallery-item:nth-child(3){transition-delay:.1s;}
.media-grid > .gallery-item:nth-child(4){transition-delay:.15s;}
.media-grid > .gallery-item:nth-child(5){transition-delay:.2s;}
.media-grid > .gallery-item:nth-child(n+6){transition-delay:.25s;}

.lightbox{
  position:fixed; inset:0; z-index:300; display:flex; align-items:center; justify-content:center; padding:var(--space-md);
  opacity:0; transition:opacity var(--dur) var(--ease);
}
.lightbox[hidden]{display:none;}
.lightbox.is-open{opacity:1;}
.lightbox-backdrop{position:absolute; inset:0; background:rgba(12,38,46,.86);}
.lightbox-dialog{
  position:relative; z-index:1; max-width:min(90vw,640px); width:100%; background:var(--bg); border-radius:var(--radius); padding:var(--space-md); box-shadow:0 20px 60px rgba(0,0,0,.4);
  transform:translateY(14px) scale(.98); transition:transform var(--dur) var(--ease);
}
.lightbox.is-open .lightbox-dialog{transform:translateY(0) scale(1);}
.lightbox-close{
  position:absolute; top:-16px; right:-16px; width:40px; height:40px; border-radius:50%; border:0;
  background:var(--well-900); color:#fff; font-size:1.6rem; line-height:1; cursor:pointer;
  display:flex; align-items:center; justify-content:center;
  transition:background-color var(--dur) var(--ease), transform var(--dur-fast) var(--ease);
}
.lightbox-close:hover, .lightbox-close:focus-visible{background:var(--accent-dark); transform:scale(1.08);}
.lightbox-content{aspect-ratio:4/3;}
.lightbox-content .photo-placeholder{width:100%; height:100%;}
.lightbox-content .photo-placeholder svg{width:56px; height:56px;}
.lightbox-content img{width:100%; height:100%; object-fit:contain; display:block; border-radius:6px;}
.lightbox-caption{margin:var(--space-sm) 0 0; text-align:center; font-weight:600; color:var(--well-900);}

.lightbox-nav{
  position:absolute; top:50%; transform:translateY(-50%); z-index:2;
  width:46px; height:46px; border-radius:50%; border:0; padding:0;
  background:rgba(12,38,46,.55); color:#fff; cursor:pointer;
  display:flex; align-items:center; justify-content:center;
  transition:background-color var(--dur) var(--ease), transform var(--dur-fast) var(--ease);
}
.lightbox-nav svg{width:22px; height:22px;}
.lightbox-nav-prev{left:var(--space-sm);}
.lightbox-nav-next{right:var(--space-sm);}
.lightbox-nav-next svg{transform:scaleX(-1);}
.lightbox-nav:hover, .lightbox-nav:focus-visible{background:var(--accent-dark); transform:translateY(-50%) scale(1.08);}
@media (max-width:520px){
  .lightbox-nav{width:38px; height:38px;}
  .lightbox-nav svg{width:18px; height:18px;}
  .lightbox-nav-prev{left:var(--space-xs);}
  .lightbox-nav-next{right:var(--space-xs);}
}

/* ---------- REFERENCE ---------- */
.reference-grid{columns:3; column-gap:var(--space-md);}
.ref-card{
  break-inside:avoid; margin:0 0 var(--space-md); padding:var(--space-md);
  background:var(--surface); border-radius:var(--radius); border-left:3px solid var(--drop);
  box-shadow:0 2px 14px rgba(12,38,46,.07);
}
.ref-card .drop-icon{width:22px; height:22px; color:var(--drop-soft); margin-bottom:var(--space-xs);}
.ref-card blockquote{margin:0 0 var(--space-sm);}
.ref-card blockquote p{font-family:var(--font-heading); font-size:1rem; line-height:1.5; color:var(--fg); margin:0;}
.ref-card figcaption{display:flex; flex-direction:column; gap:2px;}
.ref-card .ref-name{font-weight:700; font-size:.9rem; color:var(--well-900);}
.ref-card .ref-context{font-size:.82rem; color:var(--muted);}
.ref-source{
  align-self:flex-start; margin-top:6px;
  font-size:.76rem; font-weight:600; color:var(--well-600);
  text-decoration:none; border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.ref-source:hover, .ref-source:focus-visible{color:var(--accent); border-bottom-color:currentColor;}
.reference-grid > .ref-card{
  opacity:0; transform:translateY(18px);
  transition:opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}
.reference-grid > .ref-card.is-visible{opacity:1; transform:translateY(0);}
.reference-grid > .ref-card:nth-child(2){transition-delay:.05s;}
.reference-grid > .ref-card:nth-child(3){transition-delay:.1s;}
.reference-grid > .ref-card:nth-child(4){transition-delay:.15s;}
.reference-grid > .ref-card:nth-child(5){transition-delay:.2s;}
.reference-grid > .ref-card:nth-child(n+6){transition-delay:.25s;}

/* ---------- FAQ ---------- */
.faq-list{max-width:72ch;}
.faq-item{border-bottom:1px solid var(--line); padding:var(--space-sm) 0;}
.faq-item summary{
  display:flex; align-items:center; justify-content:space-between; gap:var(--space-sm);
  cursor:pointer; list-style:none; font-family:var(--font-heading); font-weight:600;
  color:var(--well-900); font-size:1.02rem;
  transition:color var(--dur) var(--ease);
}
.faq-item summary:hover{color:var(--drop);}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-toggle{position:relative; width:16px; height:16px; flex-shrink:0;}
.faq-toggle::before, .faq-toggle::after{
  content:""; position:absolute; background:var(--drop); top:50%; left:50%;
  transform:translate(-50%,-50%);
}
.faq-toggle::before{width:14px; height:2px;}
.faq-toggle::after{width:2px; height:14px; transition:transform .15s ease;}
.faq-item[open] .faq-toggle::after{transform:translate(-50%,-50%) rotate(90deg);}
.faq-item p{margin:var(--space-xs) 0 0; font-size:.95rem;}

.trust-note{font-size:.85rem; color:var(--muted); max-width:60ch; padding-top:var(--space-xs);}

/* ---------- CONTACT ---------- */
.contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:var(--space-lg);}
.contact-list{list-style:none; margin:0 0 var(--space-md); padding:0;}
.contact-list li{padding:var(--space-xs) 0; border-bottom:1px solid var(--line);}
.contact-list .label{font-size:.78rem; color:var(--muted); text-transform:uppercase; letter-spacing:.08em; display:block;}
.contact-list a{text-decoration:none; font-weight:600;}
.map-placeholder{
  background:var(--bg-alt); border:1px solid var(--line); min-height:220px;
  display:flex; align-items:center; justify-content:center; color:var(--muted);
  margin-top:var(--space-sm); text-align:center; padding:var(--space-sm); font-size:.9rem;
}
.map-placeholder iframe{width:100%; height:220px; border:0;}
.contact-photo{aspect-ratio:3/4; overflow:hidden; border-radius:var(--radius); align-self:start;}
.contact-photo img{width:100%; height:100%; object-fit:cover;}

/* ---------- FOOTER ---------- */
footer.site{background:var(--well-900); color:#dfeaec; padding:var(--space-lg) 0 var(--space-md);}
footer.site a{color:#dfeaec;}
.footer-top{display:flex; justify-content:space-between; flex-wrap:wrap; gap:var(--space-lg); margin-bottom:var(--space-md);}
.footer-top .wordmark{color:#fff;}
.footer-top .legal{color:#9db3b8; font-size:.82rem; margin-top:6px;}
.footer-links{display:flex; gap:var(--space-xl); flex-wrap:wrap;}
.footer-links h4{font-size:.78rem; text-transform:uppercase; letter-spacing:.08em; color:#9db3b8; margin-bottom:var(--space-sm);}
.footer-links ul{list-style:none; margin:0; padding:0;}
.footer-links li{margin-bottom:6px; font-size:.92rem;}
.footer-links a{transition:opacity var(--dur) var(--ease);}
.footer-links a:hover{opacity:.72;}
.copyright{padding-top:var(--space-md); border-top:1px solid rgba(255,255,255,.15); color:#9db3b8; font-size:.8rem;}

@media (max-width: 860px){
  header.site nav.desktop-nav, header.site .nav-cta .btn-primary{display:none;}
  .hamburger{display:block;}
  .value-grid{grid-template-columns:repeat(2,1fr);}
  .text-card-grid{grid-template-columns:repeat(2,1fr);}
  .process-grid{grid-template-columns:repeat(2,1fr);}
  .media-grid{grid-template-columns:repeat(2,1fr);}
  .reference-grid{columns:2;}
  .contact-grid{grid-template-columns:1fr;}
  footer.site{padding-bottom:calc(var(--space-md) + 64px);}
}
@media (max-width: 520px){
  .value-grid, .text-card-grid, .process-grid, .media-grid{grid-template-columns:1fr;}
  .reference-grid{columns:1;}
  .stat-strip{gap:var(--space-md);}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *, *::before, *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .process-step,
  .value-grid > div,
  .text-card-grid > .text-card,
  .media-grid > .gallery-item,
  .reference-grid > .ref-card{
    opacity:1; transform:none;
  }
  .media-grid > .gallery-item.is-visible:hover,
  .media-grid > .gallery-item.is-visible:focus-visible,
  .btn:hover, .btn-primary:hover, .btn-secondary:hover,
  .wordmark:hover .drop-icon{
    transform:none;
  }
}