/* ==========================================================================
   PT. KRASKA TAUSTEL — Design System
   Palette: graphite / steel-blue / safety amber / warm silver
   Type: Oswald (display, condensed structural) + Inter (body) + IBM Plex Mono (data)
   ========================================================================== */

:root{
  --charcoal: #15181c;
  --charcoal-2: #1c2126;
  --steel: #232b33;
  --steel-2: #2c3640;
  --slate: #5c6773;
  --silver: #c7ccd2;
  --silver-2: #e7e9ec;
  --paper: #f4f3ef;
  --amber: #e08a1e;
  --amber-2: #f2a53f;
  --amber-dim: #8a5817;
  --line: rgba(199,204,210,0.16);
  --line-strong: rgba(199,204,210,0.32);

  --font-display: 'Oswald', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --container: 1200px;
  --radius: 2px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--charcoal);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ margin:0; font-family:var(--font-display); font-weight:600; letter-spacing:.01em; text-transform:uppercase; }
p{ margin:0; }
button{ font-family:inherit; cursor:pointer; }

.container{ max-width:var(--container); margin:0 auto; padding:0 28px; }

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

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

/* ---------- Utility labels / eyebrows ---------- */
.eyebrow{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--amber);
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
}
.eyebrow::before{
  content:'';
  width:22px; height:2px;
  background:var(--amber);
  display:inline-block;
}
.on-dark .eyebrow{ color:var(--amber-2); }

/* ---------- Header ---------- */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:1000;
  background:rgba(21,24,28,0.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:background .3s var(--ease);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  height:76px;
}
.brand{ display:flex; align-items:center; gap:12px; }
.brand-mark{ width:34px; height:34px; flex-shrink:0; }
.brand-text{ display:flex; flex-direction:column; line-height:1.15; }
.brand-text strong{
  font-family:var(--font-display); color:var(--silver-2);
  font-size:16.5px; letter-spacing:.04em; text-transform:uppercase;
}
.brand-text span{
  font-family:var(--font-mono); font-size:10px; letter-spacing:.12em;
  color:var(--amber-2); text-transform:uppercase;
}

.main-nav{ display:flex; align-items:center; gap:36px; }
.main-nav a{
  font-family:var(--font-mono); font-size:12.5px; letter-spacing:.08em;
  text-transform:uppercase; color:var(--silver);
  position:relative; padding:6px 0;
  transition:color .2s var(--ease);
}
.main-nav a::after{
  content:''; position:absolute; left:0; bottom:0; height:2px; width:0;
  background:var(--amber); transition:width .25s var(--ease);
}
.main-nav a:hover, .main-nav a.active{ color:var(--silver-2); }
.main-nav a:hover::after, .main-nav a.active::after{ width:100%; }
.main-nav a.only-mobile{ display:none; }

.header-actions{ display:flex; align-items:center; gap:12px; }

.btn{
  font-family:var(--font-mono); font-size:12.5px; letter-spacing:.08em; text-transform:uppercase;
  padding:11px 22px; border-radius:var(--radius); border:1px solid transparent;
  display:inline-flex; align-items:center; gap:10px; white-space:nowrap;
  transition:transform .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}
.btn:hover{ transform:translateY(-1px); }
.btn-amber{ background:var(--amber); color:var(--charcoal); font-weight:600; }
.btn-amber:hover{ background:var(--amber-2); }
.btn-ghost{ border-color:var(--line-strong); color:var(--silver-2); }
.btn-ghost:hover{ border-color:var(--amber); color:var(--amber-2); }
.btn-block{ width:100%; justify-content:center; }
.btn-lg{ padding:15px 30px; font-size:13px; }

.nav-toggle{
  display:none; width:40px; height:40px; border:1px solid var(--line-strong);
  background:transparent; border-radius:var(--radius); position:relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:''; position:absolute; left:10px; right:10px; height:2px; background:var(--silver-2);
  transition:transform .25s var(--ease), opacity .2s var(--ease);
}
.nav-toggle span{ top:19px; }
.nav-toggle span::before{ top:-7px; }
.nav-toggle span::after{ top:7px; }
.nav-toggle.open span{ background:transparent; }
.nav-toggle.open span::before{ transform:translateY(7px) rotate(45deg); }
.nav-toggle.open span::after{ transform:translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero{
  position:relative;
  background:var(--charcoal);
  color:var(--silver-2);
  padding:168px 0 120px;
  overflow:hidden;
}
.hero::before{
  content:'';
  position:absolute; inset:0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 80% 60% at 30% 20%, black 40%, transparent 100%);
  opacity:.5;
}
.hero-grid{
  position:relative; z-index:1;
  display:grid; grid-template-columns:1.15fr 0.85fr; gap:60px; align-items:center;
}
.hero h1{
  font-size:clamp(38px, 5.4vw, 66px);
  line-height:1.04;
  color:var(--silver-2);
}
.hero h1 em{
  font-style:normal; color:var(--amber);
}
.hero-sub{
  margin-top:22px; max-width:520px; font-size:16.5px; color:var(--silver);
}
.hero-actions{ display:flex; gap:14px; margin-top:38px; flex-wrap:wrap; }
.hero-meta{
  margin-top:56px; display:flex; gap:34px; flex-wrap:wrap;
}
.hero-meta div{ font-family:var(--font-mono); font-size:11.5px; color:var(--slate); text-transform:uppercase; letter-spacing:.08em; }
.hero-meta strong{ display:block; font-family:var(--font-display); font-size:22px; color:var(--silver-2); text-transform:none; letter-spacing:0; }

/* Signature: technical beam drawing */
.beam-draw{ width:100%; height:auto; }
.beam-draw .lbl{ font-family:var(--font-mono); font-size:11px; fill:var(--slate); letter-spacing:.05em; }
.beam-draw .dim{ stroke:var(--slate); stroke-width:1; }
.beam-draw .beam-fill{ fill:var(--steel-2); stroke:var(--amber); stroke-width:1.5; }
.beam-draw .beam-fill-2{ fill:var(--steel); stroke:var(--line-strong); stroke-width:1; }

/* ---------- Sections generic ---------- */
section{ position:relative; }
.section{ padding:100px 0; }
.section-tight{ padding:70px 0; }
.section-head{ max-width:640px; margin-bottom:56px; }
.section-head h2{ font-size:clamp(28px,3.4vw,42px); color:var(--charcoal); line-height:1.08; }
.section-head p{ margin-top:16px; color:var(--slate); font-size:16px; }
.on-dark{ background:var(--charcoal); color:var(--silver-2); }
.on-dark .section-head h2{ color:var(--silver-2); }
.on-dark .section-head p{ color:var(--silver); }
.on-steel{ background:var(--steel); color:var(--silver-2); }

/* diagonal cut divider */
.cut-top{ clip-path:polygon(0 3.5vw, 100% 0, 100% 100%, 0 100%); margin-top:-3.5vw; }
.cut-bottom{ clip-path:polygon(0 0, 100% 0, 100% calc(100% - 3.5vw), 0 100%); }

/* ---------- About / split ---------- */
.split{
  display:grid; grid-template-columns:0.9fr 1.1fr; gap:70px; align-items:start;
}
.split-rule{
  border-left:2px solid var(--amber); padding-left:26px;
}
.lede{ font-size:19px; line-height:1.7; color:var(--charcoal); }
.body-copy{ margin-top:18px; color:var(--slate); font-size:15.5px; line-height:1.75; }

.vm-grid{ display:grid; grid-template-columns:1fr 1fr; gap:24px; margin-top:40px; }
.vm-card{
  background:#fff; border:1px solid var(--line-strong); border-top:3px solid var(--amber);
  padding:26px 24px;
}
.vm-card h3{ font-size:15px; letter-spacing:.06em; }
.vm-card p{ margin-top:12px; color:var(--slate); font-size:14.5px; line-height:1.65; }

/* ---------- Product cards ---------- */
.grid-5{ display:grid; grid-template-columns:repeat(5,1fr); gap:1px; background:var(--line-strong); border:1px solid var(--line-strong); }
.product-card{
  background:var(--charcoal-2); color:var(--silver-2); padding:34px 26px; min-height:270px;
  display:flex; flex-direction:column; position:relative; overflow:hidden;
  transition:background .25s var(--ease);
}
.product-card:hover{ background:var(--steel-2); }
.product-card .pc-icon{ width:40px; height:40px; margin-bottom:26px; }
.product-card h3{ font-size:16.5px; color:var(--silver-2); }
.product-card ul{ margin-top:16px; display:flex; flex-direction:column; gap:8px; }
.product-card li{ font-family:var(--font-mono); font-size:12px; color:var(--slate); letter-spacing:.02em; }
.product-card li::before{ content:'— '; color:var(--amber); }
.product-card .pc-more{
  margin-top:auto; padding-top:18px; font-family:var(--font-mono); font-size:11px; letter-spacing:.1em;
  color:var(--amber-2); text-transform:uppercase; display:flex; align-items:center; gap:8px;
}

/* ---------- Industries ---------- */
.industry-list{
  display:grid; grid-template-columns:repeat(5,1fr); border-top:1px solid var(--line-strong);
}
.industry-item{
  border-bottom:1px solid var(--line-strong); border-right:1px solid var(--line-strong);
  padding:26px 18px; font-family:var(--font-mono); font-size:12.5px; letter-spacing:.03em;
  color:var(--charcoal); display:flex; align-items:center; gap:10px; min-height:88px;
}
.industry-item:nth-child(5n){ border-right:none; }
.industry-item .dot{ width:6px; height:6px; background:var(--amber); flex-shrink:0; }

/* ---------- Why us ---------- */
.why-grid{ display:grid; grid-template-columns:repeat(5,1fr); gap:0; margin-top:10px; }
.why-item{ padding:0 22px 0 0; border-left:1px solid var(--line-strong); padding-left:22px; }
.why-item:first-child{ border-left:none; padding-left:0; }
.why-item .wi-num{ font-family:var(--font-mono); font-size:11px; color:var(--amber); letter-spacing:.1em; }
.why-item h3{ font-size:15.5px; margin-top:14px; color:var(--charcoal); }
.why-item p{ margin-top:12px; font-size:14px; color:var(--slate); line-height:1.65; }

/* ---------- Values ---------- */
.values-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.value-card{ text-align:left; }
.value-card .vc-mark{
  width:46px; height:46px; border:1.5px solid var(--amber); border-radius:50%;
  display:flex; align-items:center; justify-content:center; font-family:var(--font-display);
  color:var(--amber-2); font-size:16px; margin-bottom:18px;
}
.value-card h3{ font-size:15px; color:var(--silver-2); }
.value-card p{ margin-top:10px; color:var(--silver); font-size:14px; line-height:1.65; }

/* ---------- CTA banner ---------- */
.cta-banner{
  background:linear-gradient(120deg, var(--amber-dim), var(--amber) 130%);
  color:var(--charcoal); padding:80px 0;
}
.cta-inner{ display:flex; justify-content:space-between; align-items:center; gap:40px; flex-wrap:wrap; }
.cta-inner h2{ font-size:clamp(26px,3vw,38px); color:var(--charcoal); max-width:560px; line-height:1.1; }
.cta-inner p{ margin-top:10px; color:rgba(21,24,28,.75); font-size:15px; }

/* ---------- Footer ---------- */
.site-footer{ background:var(--charcoal); color:var(--silver); padding:70px 0 30px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1.1fr; gap:50px; }
.footer-brand .brand-text strong{ color:var(--silver-2); }
.footer-brand p{ margin-top:18px; font-size:14px; color:var(--slate); line-height:1.7; max-width:280px; }
.footer-col h4{
  font-family:var(--font-mono); font-size:11.5px; letter-spacing:.12em; color:var(--silver-2);
  text-transform:uppercase; margin-bottom:18px; font-weight:500;
}
.footer-col ul{ display:flex; flex-direction:column; gap:11px; }
.footer-col a, .footer-col li{ font-size:14px; color:var(--slate); }
.footer-col a:hover{ color:var(--amber-2); }
.footer-contact li{ display:flex; gap:10px; align-items:flex-start; font-size:13.5px; line-height:1.6; }
.footer-contact svg{ flex-shrink:0; margin-top:3px; width:15px; height:15px; color:var(--amber); }
.footer-bottom{
  margin-top:60px; padding-top:26px; border-top:1px solid var(--line);
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:14px;
  font-family:var(--font-mono); font-size:11.5px; color:var(--slate); letter-spacing:.03em;
}

/* ---------- Page hero (inner pages) ---------- */
.page-hero{
  background:var(--charcoal); color:var(--silver-2); padding:158px 0 70px; position:relative; overflow:hidden;
}
.page-hero::before{
  content:''; position:absolute; inset:0;
  background-image:linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:56px 56px; mask-image:radial-gradient(ellipse 70% 100% at 10% 0%, black 30%, transparent 100%); opacity:.5;
}
.page-hero .breadcrumb{ font-family:var(--font-mono); font-size:11.5px; color:var(--slate); text-transform:uppercase; letter-spacing:.08em; margin-bottom:18px; }
.page-hero .breadcrumb span{ color:var(--amber-2); }
.page-hero h1{ font-size:clamp(32px,4.5vw,52px); position:relative; z-index:1; }
.page-hero p{ margin-top:16px; max-width:560px; color:var(--silver); font-size:15.5px; position:relative; z-index:1; }

/* ---------- Product detail sections ---------- */
.pd-section{ padding:80px 0; border-bottom:1px solid var(--line-strong); }
.pd-section:nth-child(even){ background:#fbfaf7; }
.pd-head{ display:grid; grid-template-columns:0.5fr 1fr; gap:50px; align-items:start; margin-bottom:40px; }
.pd-head .pd-code{ font-family:var(--font-mono); font-size:12.5px; color:var(--amber-dim); letter-spacing:.1em; margin-bottom:10px; display:block; }
.pd-head h2{ font-size:clamp(24px,2.8vw,32px); }
.pd-head p{ color:var(--slate); font-size:15px; line-height:1.7; margin-top:14px; }
.pd-icon-wrap{ width:64px; height:64px; }
.spec-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line-strong); border:1px solid var(--line-strong); }
.spec-item{
  background:#fff; padding:20px 20px; font-family:var(--font-mono); font-size:13px; color:var(--charcoal);
  display:flex; align-items:center; gap:10px;
}
.spec-item::before{ content:'▸'; color:var(--amber); }

/* ---------- Forms ---------- */
.auth-wrap{ padding:158px 0 110px; background:var(--paper); min-height:100vh; }
.auth-card{
  max-width:480px; margin:0 auto; background:#fff; border:1px solid var(--line-strong); border-top:3px solid var(--amber);
  padding:48px 44px;
}
.auth-card h1{ font-size:26px; color:var(--charcoal); }
.auth-card .auth-sub{ margin-top:10px; color:var(--slate); font-size:14.5px; }
.field{ margin-top:22px; }
.field label{
  display:block; font-family:var(--font-mono); font-size:11.5px; letter-spacing:.08em; text-transform:uppercase;
  color:var(--slate); margin-bottom:8px;
}
.field input, .field select, .field textarea{
  width:100%; padding:13px 14px; border:1px solid var(--line-strong); background:#fff; color:var(--charcoal);
  font-family:var(--font-body); font-size:14.5px; border-radius:var(--radius); transition:border-color .2s var(--ease);
}
.field input:focus, .field select:focus, .field textarea:focus{ outline:none; border-color:var(--amber); }
.field-row{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.field-check{ display:flex; align-items:flex-start; gap:10px; margin-top:22px; }
.field-check input{ margin-top:3px; }
.field-check label{ font-size:13.5px; color:var(--slate); text-transform:none; letter-spacing:0; font-family:var(--font-body); }
.field-hint{ margin-top:6px; font-size:12px; color:var(--slate); }
.auth-submit{ margin-top:30px; }
.auth-foot{ margin-top:24px; text-align:center; font-size:13.5px; color:var(--slate); }
.auth-foot a{ color:var(--amber-dim); font-weight:600; }
.form-msg{
  margin-bottom:24px; padding:14px 16px; font-size:13.5px; border-left:3px solid var(--amber);
  background:#fbf3e7; color:var(--charcoal); display:none;
}
.form-msg.show{ display:block; }
.form-msg.err{ border-color:#c0392b; background:#fbeceb; }

/* Contact page */
.contact-grid{ display:grid; grid-template-columns:0.85fr 1.15fr; gap:60px; }
.contact-info-card{ background:var(--charcoal); color:var(--silver-2); padding:40px 34px; }
.contact-info-card h3{ font-size:16px; }
.contact-info-list{ margin-top:26px; display:flex; flex-direction:column; gap:22px; }
.contact-info-list li{ display:flex; gap:14px; align-items:flex-start; }
.contact-info-list svg{ width:20px; height:20px; color:var(--amber); flex-shrink:0; margin-top:2px; }
.contact-info-list strong{ display:block; font-size:11px; font-family:var(--font-mono); letter-spacing:.08em; text-transform:uppercase; color:var(--slate); margin-bottom:5px; }
.contact-info-list span, .contact-info-list a{ font-size:14.5px; color:var(--silver-2); line-height:1.6; }
.map-embed{ margin-top:26px; border:1px solid var(--line); height:200px; overflow:hidden; }
.map-embed iframe{ width:100%; height:100%; border:0; filter:grayscale(0.4) contrast(1.05); }
.contact-form-card{ background:#fff; border:1px solid var(--line-strong); padding:40px 36px; }

/* ---------- Marquee strip ---------- */
.strip{
  background:var(--steel); border-top:1px solid var(--line); border-bottom:1px solid var(--line);
  padding:16px 0; overflow:hidden; white-space:nowrap;
}
.strip-track{ display:inline-flex; gap:60px; animation:scroll-left 32s linear infinite; }
.strip-track span{ font-family:var(--font-mono); font-size:12px; letter-spacing:.1em; color:var(--slate); text-transform:uppercase; }
.strip-track span em{ color:var(--amber); font-style:normal; }
@keyframes scroll-left{ from{ transform:translateX(0); } to{ transform:translateX(-50%); } }

/* ---------- Scroll reveal ---------- */
.reveal{ opacity:0; transform:translateY(24px); transition:opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in{ opacity:1; transform:translateY(0); }

/* ---------- Back to top ---------- */
.back-top{
  position:fixed; right:26px; bottom:26px; width:46px; height:46px; background:var(--charcoal);
  border:1px solid var(--line-strong); display:flex; align-items:center; justify-content:center;
  opacity:0; pointer-events:none; transition:opacity .3s var(--ease), transform .3s var(--ease); z-index:900;
}
.back-top.show{ opacity:1; pointer-events:auto; }
.back-top svg{ width:16px; height:16px; color:var(--amber-2); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1080px){
  .grid-5{ grid-template-columns:repeat(3,1fr); }
  .industry-list{ grid-template-columns:repeat(3,1fr); }
  .industry-item:nth-child(5n){ border-right:1px solid var(--line-strong); }
  .industry-item:nth-child(3n){ border-right:none; }
  .why-grid{ grid-template-columns:repeat(3,1fr); row-gap:36px; }
  .why-item:nth-child(4){ border-left:none; padding-left:0; }
  .values-grid{ grid-template-columns:repeat(2,1fr); }
  .footer-grid{ grid-template-columns:1fr 1fr; row-gap:44px; }
}

@media (max-width: 880px){
  .main-nav{
    position:fixed; top:76px; left:0; right:0; bottom:0; background:var(--charcoal);
    flex-direction:column; align-items:flex-start; padding:36px 28px; gap:26px;
    transform:translateX(100%); transition:transform .3s var(--ease); overflow-y:auto;
  }
  .main-nav.open{ transform:translateX(0); }
  .main-nav a{ font-size:15px; }
  .main-nav a.only-mobile{ display:block; padding-top:14px; border-top:1px solid var(--line); margin-top:6px; }
  .nav-toggle{ display:block; }
  .header-actions .btn-ghost, .header-actions .btn-amber{ display:none; }
  .hero{ padding:130px 0 80px; }
  .hero-grid{ grid-template-columns:1fr; }
  .hero-meta{ gap:26px; }
  .split{ grid-template-columns:1fr; gap:40px; }
  .vm-grid{ grid-template-columns:1fr; }
  .grid-5{ grid-template-columns:repeat(2,1fr); }
  .industry-list{ grid-template-columns:repeat(2,1fr); }
  .industry-item:nth-child(3n){ border-right:1px solid var(--line-strong); }
  .industry-item:nth-child(2n){ border-right:none; }
  .why-grid{ grid-template-columns:repeat(2,1fr); }
  .why-item:nth-child(3){ border-left:none; padding-left:0; }
  .values-grid{ grid-template-columns:1fr; }
  .cta-inner{ flex-direction:column; align-items:flex-start; }
  .contact-grid{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr; }
  .field-row{ grid-template-columns:1fr; }
  .pd-head{ grid-template-columns:1fr; gap:16px; }
}

@media (max-width: 520px){
  .grid-5{ grid-template-columns:1fr; }
  .industry-list{ grid-template-columns:1fr; }
  .industry-item{ border-right:none !important; }
  .spec-grid{ grid-template-columns:1fr 1fr; }
  .auth-card{ padding:36px 26px; }
  .container{ padding:0 20px; }
}