/* ==========================================================================
   BIELAK SP Z O O — design tokens
   "Bielak" (pol.) — the mountain hare, which changes its coat with the season.
   The site does the same: a coat switch swaps the whole palette between
   summer (warm graphite + chartreuse) and winter (cold graphite + frost).
   Base is graphite throughout — no white page, no beige, no blue.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@500;600;800&family=JetBrains+Mono:wght@400;500&family=Manrope:wght@400;500;700&display=swap');

:root{
  /* summer coat — default */
  --bg:        #14150f;
  --panel:     #1c1e15;
  --panel-2:   #232619;
  --ink:       #eceadd;
  --ink-soft:  #a8a793;
  --ink-dim:   #6f705f;
  --line:      #32341f;
  --accent:    #c3e83f;   /* chartreuse */
  --accent-in: #14150f;   /* text on accent */
  --season:    'Summer coat';

  --display: 'Archivo', 'Trebuchet MS', sans-serif;
  --body: 'Manrope', -apple-system, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'Courier New', monospace;

  --wrap: 1200px;
  --gutter: clamp(20px, 5vw, 56px);
}

/* winter coat */
body.winter{
  --bg:        #0f1315;
  --panel:     #151a1d;
  --panel-2:   #1b2226;
  --ink:       #e4ecef;
  --ink-soft:  #97a6ac;
  --ink-dim:   #5e6c72;
  --line:      #242f34;
  --accent:    #7fe3d0;   /* frost */
  --accent-in: #0f1315;
  --season:    'Winter coat';
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation:none !important; transition-duration:.001ms !important; }
}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--body);
  font-size:16.5px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  transition:background .5s ease, color .5s ease;
}

img,svg{ display:block; max-width:100%; }
a{ color:inherit; }
p{ margin:0; }

h1,h2,h3,h4{
  font-family:var(--display);
  font-weight:800;
  line-height:1.03;
  letter-spacing:-0.025em;
  margin:0;
}

.wrap{ max-width:var(--wrap); margin-inline:auto; padding-inline:var(--gutter); }
section{ padding-block:clamp(58px,9vw,106px); }
.hair{ border-top:1px solid var(--line); }

.label{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--accent);
}

.head{ margin-bottom:clamp(32px,5vw,54px); max-width:64ch; }
.head h2{ font-size:clamp(30px,4.4vw,50px); margin-top:14px; }
.head p{ margin-top:16px; color:var(--ink-soft); max-width:54ch; }

/* ------------------------------- header --------------------------------- */

.site-header{
  position:sticky; top:0; z-index:60;
  background:color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line);
}
.site-header .wrap{ height:74px; display:flex; align-items:center; justify-content:space-between; gap:16px; }

.brand{ display:flex; align-items:center; gap:11px; text-decoration:none; }
.brand .hare{ width:34px; height:34px; flex:none; }
.brand .nm{ font-family:var(--display); font-weight:800; font-size:17px; letter-spacing:.01em; }
.brand .sub{ display:block; font-family:var(--mono); font-weight:400; font-size:9.5px; letter-spacing:.16em; color:var(--ink-dim); }

.nav{ display:flex; align-items:center; gap:26px; }
.nav ul{ list-style:none; display:flex; gap:24px; margin:0; padding:0; }
.nav a{ text-decoration:none; font-size:14.5px; font-weight:500; position:relative; padding-bottom:4px; }
.nav a::after{
  content:""; position:absolute; left:0; right:0; bottom:0; height:2px; background:var(--accent);
  transform:scaleX(0); transform-origin:left; transition:transform .26s cubic-bezier(.3,.7,.3,1);
}
.nav a:hover::after{ transform:scaleX(1); }

/* the unique bit: coat switch */
.coat{
  display:inline-flex; align-items:center; gap:9px; cursor:pointer;
  background:var(--panel); border:1px solid var(--line); color:var(--ink);
  font-family:var(--mono); font-size:11px; letter-spacing:.09em; text-transform:uppercase;
  padding:7px 12px 7px 8px; white-space:nowrap;
}
.coat .track{
  width:34px; height:18px; border-radius:20px; background:var(--panel-2);
  border:1px solid var(--line); position:relative; flex:none;
}
.coat .knob{
  position:absolute; top:2px; left:2px; width:12px; height:12px; border-radius:50%;
  background:var(--accent); transition:transform .35s cubic-bezier(.4,1.3,.5,1);
}
body.winter .coat .knob{ transform:translateX(16px); }
.coat:hover{ border-color:var(--accent); }

.tel{
  display:inline-flex; align-items:center; gap:8px; text-decoration:none;
  font-size:14px; font-weight:700; background:var(--accent); color:var(--accent-in);
  padding:10px 15px; white-space:nowrap; transition:opacity .2s;
}
.tel:hover{ opacity:.82; }

.burger{ display:none; background:none; border:0; cursor:pointer; width:34px; height:34px; position:relative; padding:0; }
.burger span{ position:absolute; left:6px; right:6px; height:2px; background:var(--ink); transition:transform .22s; }
.burger span:nth-child(1){ top:12px; }
.burger span:nth-child(2){ top:21px; }
.burger.open span:nth-child(1){ transform:translateY(4.5px) rotate(45deg); }
.burger.open span:nth-child(2){ transform:translateY(-4.5px) rotate(-45deg); }

@media (max-width:1000px){
  .nav ul{ display:none; }
  .coat .cap{ display:none; }
  .burger{ display:block; }
  .site-header.open .nav{ position:fixed; inset:74px 0 0 0; background:var(--bg); display:flex; flex-direction:column; padding:26px var(--gutter); }
  .site-header.open .nav ul{ display:flex; flex-direction:column; gap:0; width:100%; }
  .site-header.open .nav a{ display:block; padding:17px 0; border-bottom:1px solid var(--line); font-size:21px; }
}
@media (max-width:620px){ .tel .t{ display:none; } }

/* ------------------------------- hero ----------------------------------- */

.hero{ position:relative; overflow:hidden; padding-top:clamp(48px,7vw,90px); padding-bottom:0; }
.contours{
  position:absolute; inset:0; width:100%; height:100%;
  opacity:.5; pointer-events:none;
}
.contours path{ fill:none; stroke:var(--line); stroke-width:1.2; }
.contours .peak{ stroke:var(--accent); opacity:.5; }
.hero .wrap{ position:relative; z-index:2; }

.hero h1{ font-size:clamp(42px,8.4vw,96px); letter-spacing:-.04em; max-width:14ch; }
.hero h1 .sw{ color:var(--accent); }
.hero-grid{ display:grid; grid-template-columns:1.05fr .95fr; gap:clamp(24px,5vw,54px); margin-top:clamp(28px,4vw,44px); align-items:end; }
.hero-lede{ font-size:18px; color:var(--ink-soft); max-width:47ch; }
.hero-cta{ display:flex; gap:12px; flex-wrap:wrap; }
@media (max-width:800px){ .hero-grid{ grid-template-columns:1fr; align-items:start; } }

.btn{
  display:inline-flex; align-items:center; gap:9px; padding:14px 26px;
  font-family:var(--body); font-size:15px; font-weight:700; text-decoration:none;
  border:2px solid var(--accent); cursor:pointer;
}
.btn-fill{ background:var(--accent); color:var(--accent-in); }
.btn-fill:hover{ opacity:.85; }
.btn-line{ background:transparent; color:var(--ink); border-color:var(--line); }
.btn-line:hover{ border-color:var(--accent); color:var(--accent); }

.facts{
  margin-top:clamp(44px,6vw,74px); border-top:1px solid var(--line); border-bottom:1px solid var(--line);
  display:grid; grid-template-columns:repeat(3,1fr);
}
.fact{ padding:22px 24px; border-right:1px solid var(--line); }
.fact:last-child{ border-right:0; }
.fact .k{ font-family:var(--mono); font-size:11.5px; letter-spacing:.1em; text-transform:uppercase; color:var(--ink-dim); }
.fact .v{ font-family:var(--display); font-weight:600; font-size:17px; margin-top:7px; }
@media (max-width:720px){ .facts{ grid-template-columns:1fr; } .fact{ border-right:0; border-bottom:1px solid var(--line); } .fact:last-child{ border-bottom:0; } }

/* ------------------------------- services ------------------------------- */

.svc{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.svc-item{ background:var(--panel); padding:30px 26px 34px; display:flex; flex-direction:column; gap:12px; transition:background .24s; }
.svc-item:hover{ background:var(--panel-2); }
.svc-item .n{ font-family:var(--mono); font-size:12px; color:var(--accent); }
.svc-item h3{ font-size:20px; }
.svc-item p{ color:var(--ink-soft); font-size:15.5px; }
@media (max-width:900px){ .svc{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .svc{ grid-template-columns:1fr; } }

/* ------------------------------- sectors -------------------------------- */

.sect-list{ border-top:2px solid var(--accent); }
.sect-row{
  display:grid; grid-template-columns:62px 1fr auto; gap:22px; align-items:baseline;
  padding-block:24px; border-bottom:1px solid var(--line);
  transition:padding-left .24s ease, background .24s ease;
}
.sect-row:hover{ padding-left:12px; background:var(--panel); }
.sect-row .n{ font-family:var(--mono); font-size:12px; color:var(--accent); }
.sect-row h3{ font-size:clamp(20px,2.6vw,28px); }
.sect-row p{ color:var(--ink-soft); font-size:15px; text-align:right; max-width:38ch; justify-self:end; }
@media (max-width:760px){
  .sect-row{ grid-template-columns:50px 1fr; gap:6px 18px; }
  .sect-row p{ grid-column:2; text-align:left; justify-self:start; }
}

/* ------------------------------- process (ridge) ------------------------ */

.ridge{ display:grid; grid-template-columns:repeat(4,1fr); gap:0; }
.ridge-step{ padding-right:22px; position:relative; }
.ridge-step .bar{ height:4px; background:var(--line); position:relative; }
.ridge-step .bar i{ position:absolute; inset:0 auto 0 0; width:0; background:var(--accent); transition:width .6s ease; }
.ridge-step:nth-child(1) .bar i{ width:100%; }
.ridge-step:nth-child(2) .bar i{ width:72%; }
.ridge-step:nth-child(3) .bar i{ width:46%; }
.ridge-step:nth-child(4) .bar i{ width:22%; }
.ridge-step .n{ font-family:var(--mono); font-size:11.5px; color:var(--ink-dim); margin-top:16px; display:block; }
.ridge-step h3{ font-size:19px; margin:9px 0 9px; }
.ridge-step p{ color:var(--ink-soft); font-size:15px; }
@media (max-width:880px){ .ridge{ grid-template-columns:1fr 1fr; gap:26px 20px; } }
@media (max-width:520px){ .ridge{ grid-template-columns:1fr; } }

/* ------------------------------- studio --------------------------------- */

.panel{ background:var(--panel); }
.studio-grid{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(28px,5vw,58px); }
.studio-copy p{ color:var(--ink-soft); font-size:17px; max-width:50ch; }
.vals{ list-style:none; margin:0; padding:0; }
.vals li{ padding:20px 0; border-top:1px solid var(--line); }
.vals li:last-child{ border-bottom:1px solid var(--line); }
.vals h4{ font-family:var(--body); font-weight:700; font-size:15.5px; margin:0 0 5px; }
.vals h4::before{ content:"▸"; color:var(--accent); margin-right:9px; }
.vals p{ color:var(--ink-soft); font-size:14.5px; padding-left:21px; }
@media (max-width:800px){ .studio-grid{ grid-template-columns:1fr; } }

/* ------------------------------- contact -------------------------------- */

.contact-grid{ display:grid; grid-template-columns:.85fr 1.15fr; gap:clamp(28px,6vw,66px); }
.info .row{ padding:17px 0; border-top:1px solid var(--line); display:grid; grid-template-columns:92px 1fr; gap:14px; }
.info .row:last-child{ border-bottom:1px solid var(--line); }
.info dt{ font-family:var(--mono); font-size:11px; letter-spacing:.09em; text-transform:uppercase; color:var(--ink-dim); padding-top:4px; }
.info dd{ margin:0; font-size:16px; }
.info a{ text-decoration:none; box-shadow:inset 0 -2px 0 var(--accent); }

.form{ display:flex; flex-direction:column; gap:17px; }
.f{ display:flex; flex-direction:column; gap:7px; }
.f label{ font-family:var(--mono); font-size:11px; letter-spacing:.08em; text-transform:uppercase; color:var(--ink-dim); }
.f input,.f select,.f textarea{
  border:0; border-bottom:2px solid var(--line); background:transparent;
  padding:9px 2px; font-size:16px; font-family:inherit; color:var(--ink);
}
.f input:focus,.f select:focus,.f textarea:focus{ outline:none; border-bottom-color:var(--accent); }
.f select option{ background:var(--panel); color:var(--ink); }
.f textarea{ resize:vertical; min-height:96px; }
.f2{ display:grid; grid-template-columns:1fr 1fr; gap:17px; }
@media (max-width:560px){ .f2{ grid-template-columns:1fr; } }
@media (max-width:800px){ .contact-grid{ grid-template-columns:1fr; } }
.note{ font-size:13px; color:var(--ink-dim); }
.ok{ display:none; padding-top:14px; border-top:2px solid var(--accent); font-size:15px; }
.ok.show{ display:block; }

/* ------------------------------- footer --------------------------------- */

.site-footer{ background:var(--panel); padding-block:48px 24px; border-top:1px solid var(--line); }
.f-top{ display:grid; grid-template-columns:1.4fr .8fr .9fr; gap:34px; padding-bottom:32px; border-bottom:1px solid var(--line); }
.f-brand{ font-family:var(--display); font-weight:800; font-size:19px; }
.f-tag{ margin-top:13px; color:var(--ink-soft); max-width:38ch; font-size:14.5px; }
.f-col h5{ margin:0 0 13px; font-family:var(--mono); font-size:11px; letter-spacing:.11em; text-transform:uppercase; color:var(--accent); font-weight:400; }
.f-col ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:9px; }
.f-col a,.f-col li{ text-decoration:none; font-size:14.5px; color:var(--ink-soft); }
.f-col a:hover{ color:var(--ink); }
.f-bot{ display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; padding-top:20px; font-family:var(--mono); font-size:11.5px; color:var(--ink-dim); }
.f-bot a{ color:var(--ink-dim); text-decoration:none; }
.f-bot a:hover{ color:var(--ink); }
@media (max-width:800px){ .f-top{ grid-template-columns:1fr; gap:26px; } }

/* ------------------------------- legal page ----------------------------- */

.legal-hero{ padding-top:clamp(44px,7vw,76px); padding-bottom:20px; }
.legal-hero h1{ font-size:clamp(34px,5.4vw,56px); margin-top:14px; }
.legal-date{ margin-top:14px; font-family:var(--mono); font-size:12.5px; color:var(--ink-dim); }

.legal-body{ padding-top:6px; padding-bottom:74px; }
.legal-body .wrap{ display:grid; grid-template-columns:220px 1fr; gap:clamp(26px,5vw,52px); }
.toc{ position:sticky; top:96px; align-self:start; }
.toc ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:9px; }
.toc a{ text-decoration:none; font-size:13.5px; color:var(--ink-soft); padding-left:12px; border-left:2px solid var(--line); display:block; }
.toc a:hover{ color:var(--accent); border-left-color:var(--accent); }

.legal h2{ font-size:22px; margin:44px 0 12px; scroll-margin-top:96px; }
.legal h2:first-child{ margin-top:0; }
.legal p{ color:var(--ink-soft); margin-bottom:13px; max-width:66ch; }
.legal ul{ color:var(--ink-soft); padding-left:20px; margin-bottom:13px; max-width:66ch; }
.legal li{ margin-bottom:6px; }
.legal strong{ color:var(--ink); }
@media (max-width:860px){
  .legal-body .wrap{ grid-template-columns:1fr; }
  .toc{ position:static; margin-bottom:26px; }
  .toc ul{ flex-direction:row; flex-wrap:wrap; gap:12px; }
}