/* ==========================================================================
   HELIXA — narzędzia i obrabiarki CNC
   Design system: precision-drawing / blueprint industrial — dark edition
   ========================================================================== */

:root{
  --bg:         #0A0A0B;
  --bg-alt:     #131416;
  --ink:        #F2F3F5;
  --ink-dim:    #9BA3AB;
  --line:       rgba(255,255,255,0.14);
  --line-soft:  rgba(255,255,255,0.08);
  --blueprint:  #6FA8DC;
  --blueprint-solid: #1F4E86;
  --accent:     #3B7DE8;
  --accent-2:   #5B93EE;
  --danger:     #E5484D;
  --danger-2:   #FF6369;
  --white:      #FFFFFF;
  --black:      #000000;

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

  --maxw: 1180px;
  --radius:    16px;
  --radius-sm: 10px;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: inherit; }
h1,h2,h3,h4{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 0.95;
  margin: 0 0 0.4em 0;
  letter-spacing: 0.2px;
  color: var(--ink);
}
h1{ font-size: clamp(2.6rem, 5.5vw, 4.6rem); }
h2{ font-size: clamp(1.9rem, 3.4vw, 2.7rem); }
h3{ font-size: 1.35rem; }
p{ margin: 0 0 1em 0; max-width: 62ch; color: var(--ink-dim); }
.mono{ font-family: var(--font-mono); }

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

/* ---------- focus & motion ---------- */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
@media (prefers-reduced-motion: reduce){
  *{ animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* ---------- header / nav ---------- */
.site-header{
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height: 84px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  color: var(--ink);
}
.brand-logo{
  height: 38px;
  width: auto;
}
nav.main-nav ul{
  list-style:none;
  display:flex;
  gap: 34px;
  margin:0; padding:0;
}
nav.main-nav a{
  text-decoration:none;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-dim);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}
nav.main-nav a:hover, nav.main-nav a[aria-current="page"]{
  color: var(--ink);
  border-bottom-color: var(--accent);
}
.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background: var(--accent);
  color: var(--white) !important;
  padding: 10px 20px;
  text-decoration:none;
  font-size:0.9rem;
  font-weight:600;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  transition: background .2s ease, border-color .2s ease;
}
.nav-cta:hover{
  background: var(--accent-2);
  border-color: var(--accent-2);
  color: var(--white) !important;
}
.nav-toggle{ display:none; }

@media (max-width: 860px){
  nav.main-nav{
    position:fixed; inset:84px 0 0 0;
    background: var(--bg);
    transform: translateY(-110%);
    transition: transform .25s ease;
    border-top:1px solid var(--line);
    overflow-y:auto;
  }
  nav.main-nav.open{ transform: translateY(0); }
  nav.main-nav ul{
    flex-direction:column;
    gap:0;
    padding: 10px 28px 30px;
  }
  nav.main-nav li{ border-bottom:1px solid var(--line); }
  nav.main-nav a{ display:block; padding: 16px 2px; }
  .nav-cta{ margin: 20px 0 0; display:inline-flex; }
  .nav-toggle{
    display:flex; align-items:center; justify-content:center;
    width:44px; height:44px;
    background:none; border:1px solid var(--line);
    cursor:pointer;
  }
  .nav-toggle span{
    display:block; width:20px; height:2px; background:var(--ink);
    position:relative;
  }
  .nav-toggle span::before, .nav-toggle span::after{
    content:""; position:absolute; left:0; width:20px; height:2px; background:var(--ink);
  }
  .nav-toggle span::before{ top:-6px; }
  .nav-toggle span::after{ top:6px; }
}
@media (min-width:861px){
  .nav-toggle{ display:none; }
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding: 14px 26px;
  text-decoration:none;
  font-weight:600;
  font-size:0.96rem;
  border:1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor:pointer;
  border-radius: var(--radius-sm);
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}
.btn-solid{ background: var(--ink); color: var(--bg); }
.btn-solid:hover{ background: var(--accent); border-color:var(--accent); color:var(--white); }
.btn-line:hover{ border-color: var(--accent); color: var(--accent-2); }
.btn-accent{ background: var(--accent); border-color: var(--accent); color: var(--white); }
.btn-accent:hover{ background: var(--accent-2); border-color: var(--accent-2); }

/* ---------- hero ---------- */
.hero{
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(var(--line-soft) 1px, transparent 1px) 0 0/100% 42px,
    var(--bg);
  position: relative;
  overflow: hidden;
}
.hero-bg{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.32;
  z-index: 0;
  pointer-events: none;
}
.hero-bg img{ width:100%; height:100%; object-fit: cover; object-position: center top; }
.hero .wrap{ position: relative; z-index: 1; }
@media (max-width: 900px){
  .hero-bg{ opacity: 0.22; }
}
@media (max-width: 600px){
  .hero-bg{ opacity: 0.16; }
}
.hero .wrap{
  padding-top: 76px;
  padding-bottom: 60px;
}
.hero-copy{ max-width: 800px; }
.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--accent-2);
  border: 1px solid rgba(59,125,232,0.4);
  background: rgba(59,125,232,0.08);
  border-radius: 999px;
  padding: 8px 16px;
  margin-bottom: 26px;
}
.accent-text{ color: var(--accent); }
.hero-copy h1{ max-width: 15ch; }
.hero-copy > p{ font-size: 1.08rem; max-width: 62ch; }
.hero-actions{ display:flex; gap:16px; margin-top: 34px; flex-wrap:wrap; }
.hero-stats{
  display:flex; gap: 56px; margin-top: 54px; padding-top: 40px;
  border-top: 1px solid var(--line);
  flex-wrap:wrap;
}
.hero-stats .stat-num{
  font-family: var(--font-display);
  font-size: 2.1rem;
  color: var(--ink);
}
.hero-stats .stat-label{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-dim);
}

@media (max-width: 860px){
  .hero .wrap{ padding-top: 46px; padding-bottom: 40px; }
}

/* ---------- sections ---------- */
section{ padding: 84px 0; border-bottom: 1px solid var(--line); }
section:last-of-type{ border-bottom:none; }
.section-dark{ background: var(--bg-alt); border-bottom: 1px solid var(--line); }
.section-dark .section-head .kicker{ color: var(--accent); }
.section-head{ max-width: 640px; margin-bottom: 54px; }
.kicker{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--blueprint);
  display:block;
  margin-bottom: 14px;
}

/* category / card grid — rounded panels with gaps */
.grid{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.grid.cols-3{ grid-template-columns: repeat(3,1fr); }
.grid .cell{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 28px;
}
.cell .cell-num{
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  display:block;
  margin-bottom: 16px;
}
@media (max-width: 900px){
  .grid{ grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 560px){
  .grid{ grid-template-columns: 1fr; }
}

/* offer list rows (Oferta page) */
.offer-row{
  display:grid;
  grid-template-columns: 200px 1fr 220px;
  gap: 30px;
  padding: 32px;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  align-items:start;
}
.offer-row .offer-tag{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--blueprint);
}
.offer-row ul{ margin: 14px 0 0; padding-left: 18px; color: var(--ink-dim); }
.offer-row li{ margin-bottom: 6px; }
@media (max-width: 760px){
  .offer-row{ grid-template-columns: 1fr; gap: 10px; }
}

/* two column text/figure */
.split{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items:center;
}
@media (max-width: 860px){
  .split{ grid-template-columns:1fr; gap: 32px; }
}

/* stats strip */
.stats-strip{
  display:grid;
  grid-template-columns: repeat(4,1fr);
  gap: 16px;
}
.stats-strip .stat{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
}
.stats-strip .stat .stat-num{
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--blueprint);
}
.stats-strip .stat .stat-label{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-dim);
}
@media (max-width:760px){
  .stats-strip{ grid-template-columns: repeat(2,1fr); }
}

/* timeline (O nas) */
.timeline{ border-top: 1px solid var(--line); }
.timeline-row{
  display:grid;
  grid-template-columns: 120px 1fr;
  gap: 26px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}
.timeline-row .t-year{
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1.05rem;
}

/* CTA band */
.cta-band{
  background: var(--blueprint-solid);
  color: var(--white);
  border-bottom:none;
}
.cta-band p, .cta-band .ink-dim{ color: rgba(255,255,255,0.75); }
.cta-band .wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 30px;
  flex-wrap:wrap;
}
.cta-band h2{ color: var(--white); margin:0; }
.cta-band .btn-solid{ background: var(--accent); border-color: var(--accent); color: var(--white); }
.cta-band .btn-solid:hover{ background: var(--white); color: var(--blueprint-solid); border-color:var(--white); }

/* contact page */
.contact-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
}
@media (max-width: 860px){
  .contact-grid{ grid-template-columns:1fr; gap: 40px; }
}
.contact-info dt{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-dim);
  margin-top: 22px;
}
.contact-info dd{
  margin: 4px 0 0;
  font-size: 1.05rem;
  color: var(--ink);
}
form.contact-form{ display:flex; flex-direction:column; gap: 18px; }
.field label{
  display:block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-dim);
  margin-bottom: 8px;
}
.field input, .field textarea, .field select{
  width:100%;
  border: 1px solid var(--line);
  background: var(--bg-alt);
  padding: 13px 14px;
  font-family: var(--font-body);
  font-size: 0.98rem;
  color: var(--ink);
  border-radius: var(--radius-sm);
}
.field textarea{ resize: vertical; min-height: 130px; }
.form-note{ font-size:0.85rem; color: var(--ink-dim); }

/* footer */
footer.site-footer{
  background: var(--bg);
  color: var(--ink-dim);
  border-top: 1px solid var(--line);
  padding: 60px 0 30px;
}
.footer-logo{ height: 26px; width:auto; margin-bottom: 14px; }
.footer-grid{
  display:grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
}
.footer-grid h4{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-dim);
  margin-bottom: 16px;
}
.footer-grid ul{ list-style:none; margin:0; padding:0; }
.footer-grid li{ margin-bottom: 10px; color: var(--ink-dim); }
.footer-grid a{ text-decoration:none; color: var(--ink-dim); }
.footer-grid a:hover{ color: var(--accent); }
.footer-bottom{
  display:flex; justify-content:space-between; align-items:center;
  padding-top: 24px; font-size:0.82rem; color: var(--ink-dim); flex-wrap:wrap; gap:10px;
}
@media (max-width: 760px){
  .footer-grid{ grid-template-columns: 1fr 1fr; }
}

/* brand partner tiles */
.section-head-center{ margin-left:auto; margin-right:auto; text-align:center; }
.brand-grid{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.brand-tile{
  border: 1px solid var(--line);
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 28px 20px;
  display:flex;
  align-items:center;
  justify-content:center;
  min-height: 88px;
  text-align:center;
  transition: border-color .2s ease, background .2s ease;
}
.brand-tile:has(a):hover{
  border-color: var(--accent);
  background: rgba(59,125,232,0.08);
}
.brand-tile.logo{
  background: #F4F5F6;
  border-color: rgba(255,255,255,0.06);
  padding: 20px 24px;
}
.brand-tile.logo:hover{ border-color: var(--accent); }
.brand-tile.logo a{ display:flex; align-items:center; justify-content:center; width:100%; height:100%; }
.brand-tile.logo img{ max-width:100%; max-height:52px; width:auto; object-fit:contain; }
.brand-tile span, .brand-tile a{
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--ink-dim);
  letter-spacing: 0.4px;
  text-decoration: none;
}
.brand-tile a:hover{ color: var(--ink); }
@media (max-width: 900px){
  .brand-grid{ grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 560px){
  .brand-grid{ grid-template-columns: repeat(2, 1fr); }
}

/* ---------- offer cards (icon grid) ---------- */
.offer-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.offer-card{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-alt);
  padding: 28px;
  display:flex;
  flex-direction:column;
  gap: 12px;
  transition: border-color .2s ease;
}
.offer-card:hover{ border-color: rgba(59,125,232,0.5); }
.offer-icon{
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(59,125,232,0.12);
  border: 1px solid rgba(59,125,232,0.35);
  display:flex;
  align-items:center;
  justify-content:center;
  color: var(--accent-2);
  margin-bottom: 6px;
}
.offer-icon svg{ width: 22px; height: 22px; }
.offer-card h3{ font-size: 1.1rem; margin: 0; }
.offer-card p{ font-size: 0.92rem; color: var(--ink-dim); margin: 0; flex: 1; }
.offer-link{
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--accent-2);
  text-decoration: none;
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.offer-link:hover{ color: var(--accent); }
@media (max-width: 900px){ .offer-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 600px){ .offer-grid{ grid-template-columns: 1fr; } }

/* help band */
.help-band{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-alt);
  padding: 40px;
}
.help-band h2{ margin-bottom: 10px; }
.help-band p{ max-width: 60ch; }

/* ---------- calculator page ---------- */
.calc-grid{
  display:grid;
  grid-template-columns: 1fr 320px;
  gap: 20px;
  align-items:stretch;
}
@media (max-width: 800px){ .calc-grid{ grid-template-columns: 1fr; } }
.calc-card{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-alt);
  padding: 30px;
}
.calc-fields-2col{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
@media (max-width: 520px){ .calc-fields-2col{ grid-template-columns: 1fr; } }
.result-card{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-alt);
  padding: 30px;
  display:flex;
  flex-direction:column;
  gap: 22px;
}
.result-item .result-label{
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-dim);
  margin-bottom: 6px;
}
.result-item .result-value{
  font-family: var(--font-display);
  font-size: 2.3rem;
  color: var(--accent-2);
  line-height: 1;
}
.result-item .result-value span{ font-size: 1.1rem; font-family: var(--font-body); color: var(--ink-dim); margin-left: 6px; }
.result-item .result-formula{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-dim);
  margin-top: 6px;
}
.result-divider{ border-top: 1px solid var(--line); }
.result-note{
  display:flex;
  gap:10px;
  font-size: 0.82rem;
  color: var(--ink-dim);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px;
}

/* spec table */
.table-wrap{ overflow-x:auto; border: 1px solid var(--line); border-radius: var(--radius); }
.spec-table{ width:100%; border-collapse:collapse; font-size:0.94rem; min-width: 520px; }
.spec-table th{
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-dim);
  text-align:left;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
}
.spec-table td{
  padding: 12px 18px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink);
}
.spec-table tr:last-child td{ border-bottom:none; }
.spec-table td.highlight{ color: var(--accent-2); font-family: var(--font-mono); font-weight:600; }

/* quick nav (Dla technologa) */
.quick-nav{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
  margin-top: 28px;
}
.quick-nav a{
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-dim);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 16px;
  transition: border-color .2s ease, color .2s ease, background .2s ease;
}
.quick-nav a:hover{
  color: var(--ink);
  border-color: var(--accent);
  background: rgba(59,125,232,0.08);
}

/* offset anchor targets so the sticky header doesn't cover headings */
section[id]{ scroll-margin-top: 100px; }

/* form success/error alerts */
.form-alert{
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  margin-bottom: 20px;
  font-size: 0.95rem;
}
.form-alert-success{
  background: rgba(59,125,232,0.1);
  border: 1px solid rgba(59,125,232,0.4);
  color: var(--ink);
}
.form-alert-error{
  background: rgba(229,72,77,0.1);
  border: 1px solid rgba(229,72,77,0.4);
  color: var(--ink);
}