/* ==========================================================================
   KOWALSCY SP Z O O — design tokens
   "Kowal" (pol.) — a blacksmith; "Kowalscy" — the smiths, a family of them.
   The whole surface is cold forged iron; the only colour is heat, and the
   visitor controls how hot it runs via the forge slider (--heat).
   No white page, no beige, no blue.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@400;500;600;700&family=Public+Sans:wght@400;500;700&family=Roboto+Mono:wght@400;500&display=swap');

:root{
  --iron:      #14100e;   /* page — cold forge floor */
  --iron-2:    #1c1815;   /* raised panel */
  --iron-3:    #262019;   /* hover */
  --steel:     #e8e2da;   /* primary text — brushed steel */
  --steel-sft: #a29a90;
  --steel-dim: #6e675f;
  --line:      #352d25;

  /* the heat: overwritten live by the forge slider */
  --heat:      #ff7a18;
  --heat-in:   #14100e;

  --display: 'Oswald', 'Arial Narrow', sans-serif;
  --body: 'Public Sans', -apple-system, 'Segoe UI', sans-serif;
  --mono: 'Roboto Mono', ui-monospace, 'Courier New', monospace;

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

*,*::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(--iron);
  color:var(--steel);
  font-family:var(--body);
  font-size:16.5px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

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

h1,h2,h3,h4{
  font-family:var(--display);
  font-weight:600;
  line-height:1.04;
  letter-spacing:.005em;
  text-transform:uppercase;
  margin:0;
}

.wrap{ max-width:var(--wrap); margin-inline:auto; padding-inline:var(--gutter); }
section{ padding-block:clamp(56px,9vw,104px); }

/* hammered divider — struck marks along a hairline */
.strike{
  height:9px; width:100%;
  background:
    repeating-linear-gradient(90deg, var(--line) 0 14px, transparent 14px 30px) 0 4px / 100% 1px no-repeat,
    linear-gradient(var(--line), var(--line)) 0 4px / 100% 1px no-repeat;
  opacity:.85;
}

.label{
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--heat);
  transition:color .3s;
}

.head{ margin-bottom:clamp(30px,5vw,52px); max-width:64ch; }
.head h2{ font-size:clamp(31px,4.6vw,54px); margin-top:12px; }
.head p{ margin-top:15px; color:var(--steel-sft); max-width:54ch; }

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

.site-header{
  position:sticky; top:0; z-index:60;
  background:rgba(20,16,14,.94);
  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 .anvil{ width:36px; height:30px; flex:none; }
.brand .nm{ font-family:var(--display); font-weight:700; font-size:19px; letter-spacing:.04em; }
.brand .sub{ display:block; font-family:var(--mono); font-size:9.5px; letter-spacing:.18em; color:var(--steel-dim); }

.nav{ display:flex; align-items:center; gap:24px; }
.nav ul{ list-style:none; display:flex; gap:22px; margin:0; padding:0; }
.nav a{
  text-decoration:none; font-family:var(--display); font-weight:500;
  font-size:15px; letter-spacing:.06em; text-transform:uppercase;
  position:relative; padding-bottom:4px;
}
.nav a::after{
  content:""; position:absolute; left:0; right:0; bottom:0; height:2px; background:var(--heat);
  transform:scaleX(0); transform-origin:left; transition:transform .24s ease;
}
.nav a:hover::after{ transform:scaleX(1); }

/* the unique bit: forge temperature control */
.forge{
  display:flex; align-items:center; gap:10px;
  background:var(--iron-2); border:1px solid var(--line); padding:7px 12px;
}
.forge .cap{ font-family:var(--mono); font-size:10px; letter-spacing:.12em; text-transform:uppercase; color:var(--steel-dim); }
.forge input[type=range]{
  -webkit-appearance:none; appearance:none; width:96px; height:4px; border-radius:0;
  background:linear-gradient(90deg,#6b2408,#ff7a18,#ffd15c);
  outline:none; cursor:ew-resize;
}
.forge input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none; appearance:none; width:13px; height:17px;
  background:var(--steel); border:1px solid var(--iron); cursor:ew-resize;
}
.forge input[type=range]::-moz-range-thumb{
  width:13px; height:17px; background:var(--steel); border:1px solid var(--iron); border-radius:0; cursor:ew-resize;
}
.forge .deg{
  font-family:var(--mono); font-size:11.5px; color:var(--heat);
  min-width:52px; text-align:right; transition:color .3s;
}

.tel{
  display:inline-flex; align-items:center; gap:8px; text-decoration:none;
  font-family:var(--display); font-size:15px; font-weight:600; letter-spacing:.04em;
  background:var(--heat); color:var(--heat-in); padding:10px 16px; white-space:nowrap;
  transition:background .3s, opacity .2s;
}
.tel:hover{ opacity:.85; }

.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(--steel); 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:1080px){
  .nav ul{ display:none; }
  .burger{ display:block; }
  .site-header.open .nav{ position:fixed; inset:74px 0 0 0; background:var(--iron); 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:23px; }
}
@media (max-width:860px){ .forge .cap{ display:none; } }
@media (max-width:680px){ .forge{ display:none; } .tel .t{ display:none; } }

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

.hero{ padding-top:clamp(46px,7vw,88px); padding-bottom:0; position:relative; overflow:hidden; }
.hero::after{
  content:""; position:absolute; right:-14%; top:-28%;
  width:min(620px,64vw); aspect-ratio:1; border-radius:50%;
  background:radial-gradient(circle, var(--heat) 0%, transparent 66%);
  opacity:.16; pointer-events:none; transition:background .3s;
}
.hero .wrap{ position:relative; z-index:2; }

.hero h1{
  font-size:clamp(46px,9.6vw,116px);
  font-weight:700; line-height:.95; letter-spacing:.005em;
  max-width:16ch;
}
.hero h1 .hot{
  color:var(--heat);
  transition:color .3s, text-shadow .3s;
  text-shadow:0 0 34px color-mix(in srgb, var(--heat) 40%, transparent);
}
.hero-grid{ display:grid; grid-template-columns:1.05fr .95fr; gap:clamp(24px,5vw,54px); margin-top:clamp(26px,4vw,44px); align-items:end; }
.hero-lede{ font-size:18px; color:var(--steel-sft); 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 28px;
  font-family:var(--display); font-size:16px; font-weight:600; letter-spacing:.05em;
  text-transform:uppercase; text-decoration:none; border:2px solid var(--heat); cursor:pointer;
  transition:border-color .3s, background .3s, color .3s;
}
.btn-fill{ background:var(--heat); color:var(--heat-in); }
.btn-fill:hover{ opacity:.86; }
.btn-line{ background:transparent; color:var(--steel); border-color:var(--line); }
.btn-line:hover{ border-color:var(--heat); color:var(--heat); }

.facts{ margin-top:clamp(42px,6vw,72px); 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:10.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--steel-dim); }
.fact .v{ font-family:var(--display); font-weight:500; font-size:19px; margin-top:7px; text-transform:uppercase; }
@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{ border-top:2px solid var(--heat); transition:border-color .3s; }
.svc-item{
  display:grid; grid-template-columns:74px 300px 1fr; gap:26px;
  padding-block:26px; border-bottom:1px solid var(--line);
  border-left:3px solid transparent; padding-left:0;
  transition:border-left-color .24s ease, padding-left .24s ease, background .24s ease;
}
.svc-item:hover{ border-left-color:var(--heat); padding-left:16px; background:var(--iron-2); }
.svc-item .n{ font-family:var(--mono); font-size:11.5px; color:var(--heat); padding-top:6px; transition:color .3s; }
.svc-item h3{ font-size:23px; }
.svc-item p{ color:var(--steel-sft); font-size:15.5px; max-width:56ch; }
@media (max-width:860px){
  .svc-item{ grid-template-columns:58px 1fr; gap:6px 18px; }
  .svc-item p{ grid-column:2; }
}

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

.sectors{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.sector{ background:var(--iron-2); padding:28px 24px 32px; min-height:172px; display:flex; flex-direction:column; justify-content:space-between; transition:background .24s; }
.sector:hover{ background:var(--iron-3); }
.sector .tag{ font-family:var(--mono); font-size:10.5px; letter-spacing:.13em; text-transform:uppercase; color:var(--heat); transition:color .3s; }
.sector h3{ font-size:21px; margin-top:22px; }
@media (max-width:900px){ .sectors{ grid-template-columns:1fr 1fr; } }
@media (max-width:520px){ .sectors{ grid-template-columns:1fr; } }

/* ------------------------------- process (forge stages) ----------------- */

.forge-steps{ display:grid; grid-template-columns:repeat(4,1fr); gap:clamp(18px,3vw,30px); }
.fstep{ border-top:3px solid var(--line); padding-top:20px; transition:border-color .3s; }
.fstep:hover{ border-top-color:var(--heat); }
.fstep .glyph{ width:34px; height:34px; color:var(--heat); transition:color .3s; }
.fstep .n{ font-family:var(--mono); font-size:11px; letter-spacing:.13em; text-transform:uppercase; color:var(--steel-dim); margin-top:16px; display:block; }
.fstep h3{ font-size:22px; margin:8px 0 9px; }
.fstep .sub{ font-family:var(--mono); font-size:11.5px; color:var(--heat); margin-bottom:9px; transition:color .3s; }
.fstep p{ color:var(--steel-sft); font-size:15px; }
@media (max-width:880px){ .forge-steps{ grid-template-columns:1fr 1fr; gap:28px 22px; } }
@media (max-width:520px){ .forge-steps{ grid-template-columns:1fr; } }

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

.panel{ background:var(--iron-2); }
.studio-grid{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(28px,5vw,58px); }
.studio-copy p{ color:var(--steel-sft); 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(--display); font-weight:600; font-size:18px; margin:0 0 6px; }
.vals h4::before{ content:"◆"; color:var(--heat); margin-right:10px; font-size:11px; vertical-align:middle; transition:color .3s; }
.vals p{ color:var(--steel-sft); font-size:14.5px; padding-left:23px; }
@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:10.5px; letter-spacing:.13em; text-transform:uppercase; color:var(--steel-dim); padding-top:4px; }
.info dd{ margin:0; font-size:16px; }
.info a{ text-decoration:none; box-shadow:inset 0 -2px 0 var(--heat); transition:box-shadow .3s; }

.form{ display:flex; flex-direction:column; gap:17px; }
.f{ display:flex; flex-direction:column; gap:7px; }
.f label{ font-family:var(--mono); font-size:10.5px; letter-spacing:.12em; text-transform:uppercase; color:var(--steel-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(--steel);
}
.f input:focus,.f select:focus,.f textarea:focus{ outline:none; border-bottom-color:var(--heat); }
.f select option{ background:var(--iron-2); color:var(--steel); }
.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(--steel-dim); }
.ok{ display:none; padding-top:14px; border-top:2px solid var(--heat); font-size:15px; }
.ok.show{ display:block; }

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

.site-footer{ background:var(--iron-2); 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:700; font-size:21px; text-transform:uppercase; letter-spacing:.04em; }
.f-tag{ margin-top:13px; color:var(--steel-sft); max-width:38ch; font-size:14.5px; }
.f-col h5{ margin:0 0 13px; font-family:var(--mono); font-size:10.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--heat); font-weight:400; transition:color .3s; }
.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(--steel-sft); }
.f-col a:hover{ color:var(--steel); }
.f-bot{ display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; padding-top:20px; font-family:var(--mono); font-size:11px; color:var(--steel-dim); }
.f-bot a{ color:var(--steel-dim); text-decoration:none; }
.f-bot a:hover{ color:var(--steel); }
@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(36px,5.6vw,62px); margin-top:12px; font-weight:700; }
.legal-date{ margin-top:14px; font-family:var(--mono); font-size:12px; color:var(--steel-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(--steel-sft); padding-left:12px; border-left:2px solid var(--line); display:block; }
.toc a:hover{ color:var(--heat); border-left-color:var(--heat); }

.legal h2{ font-size:23px; margin:44px 0 12px; scroll-margin-top:96px; }
.legal h2:first-child{ margin-top:0; }
.legal p{ color:var(--steel-sft); margin-bottom:13px; max-width:66ch; }
.legal ul{ color:var(--steel-sft); padding-left:20px; margin-bottom:13px; max-width:66ch; }
.legal li{ margin-bottom:6px; }
.legal strong{ color:var(--steel); }
@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; }
}