/* ===========================================================
   Data Vision — global styles
   Dark modern tech theme
   =========================================================== */

:root {
  --bg:        #070a12;
  --bg-2:      #0b1020;
  --surface:   #0f1626;
  --surface-2: #131c30;
  --border:    rgba(120, 160, 220, 0.14);
  --border-2:  rgba(120, 160, 220, 0.28);
  --text:      #e8eef7;
  --text-dim:  #9fb0c8;
  --text-mute: #67768f;
  --accent:    #1fbeff;
  --accent-2:  #0a63d6;
  --accent-3:  #005cb7;
  --glow:      rgba(31, 190, 255, 0.38);
  --radius:    16px;
  --maxw:      1180px;
  --grad:      linear-gradient(120deg, #1fbeff 0%, #0a63d6 100%);
  --font-body: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-head: 'Space Grotesk', 'Inter', system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Background texture */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 600px at 80% -10%, rgba(10,99,214,0.18), transparent 60%),
    radial-gradient(700px 500px at 0% 0%, rgba(31,190,255,0.12), transparent 55%),
    radial-gradient(800px 700px at 50% 120%, rgba(0,92,183,0.14), transparent 60%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(120,160,220,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,160,220,0.045) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(circle at 50% 30%, black, transparent 85%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, black, transparent 85%);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 { font-family: var(--font-head); line-height: 1.12; letter-spacing: -0.02em; font-weight: 600; }
h1 { font-size: clamp(2.3rem, 5.5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.7rem); }
h3 { font-size: 1.25rem; }
p  { color: var(--text-dim); }

.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.8rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); font-weight: 600;
  padding: 6px 14px; border: 1px solid var(--border-2); border-radius: 100px;
  background: rgba(34,211,238,0.06);
}
.eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--glow); }

.section { padding: 96px 0; }
.section-head { max-width: 680px; margin-bottom: 54px; }
.section-head p { margin-top: 14px; font-size: 1.05rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 600; font-size: 0.95rem;
  padding: 13px 26px; border-radius: 100px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
}
.btn-primary { background: var(--grad); color: #051018; box-shadow: 0 8px 30px rgba(34,211,238,0.25); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 40px rgba(34,211,238,0.4); }
.btn-ghost { background: rgba(255,255,255,0.02); border-color: var(--border-2); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); background: rgba(34,211,238,0.07); transform: translateY(-2px); }

/* ---------- Header / Nav ---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: rgba(7,10,18,0.72);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 11px; }
.brand img { height: 34px; width: auto; display: block; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 9px 16px; border-radius: 100px; color: var(--text-dim);
  font-size: 0.94rem; font-weight: 500; transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.nav-links a.active { color: var(--text); background: rgba(34,211,238,0.10); }

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

.lang-toggle {
  display: flex; border: 1px solid var(--border-2); border-radius: 100px; overflow: hidden;
  background: rgba(255,255,255,0.02);
}
.lang-toggle button, .lang-toggle a {
  background: none; border: none; cursor: pointer; color: var(--text-mute);
  font-weight: 600; font-size: 0.8rem; padding: 7px 12px; transition: .2s; font-family: var(--font-body);
  text-decoration: none; display: inline-flex; align-items: center; line-height: 1;
}
.lang-toggle button.active, .lang-toggle a.active { background: var(--grad); color: #051018; }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); transition: .3s; border-radius: 2px; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 90px 0 80px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.hero h1 { margin: 22px 0 20px; }
.hero p.lead { font-size: 1.15rem; max-width: 560px; }
.hero-actions { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 36px; margin-top: 48px; flex-wrap: wrap; }
.hero-stats .stat .num { font-family: var(--font-head); font-size: 2rem; font-weight: 600; }
.hero-stats .stat .lbl { font-size: 0.85rem; color: var(--text-mute); }

/* Hero visual card */
.hero-visual {
  position: relative; border: 1px solid var(--border-2); border-radius: 22px;
  background: linear-gradient(160deg, var(--surface), var(--bg-2));
  padding: 26px; overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
}
.hero-visual::before {
  content:""; position:absolute; inset:0;
  background: radial-gradient(400px 200px at 80% 0%, rgba(34,211,238,0.18), transparent 70%);
}
.terminal-bar { display:flex; gap:7px; margin-bottom:18px; position:relative; }
.terminal-bar span { width:11px; height:11px; border-radius:50%; background:#2a3550; }
.terminal-bar span:nth-child(1){ background:#ff5f57; }
.terminal-bar span:nth-child(2){ background:#febc2e; }
.terminal-bar span:nth-child(3){ background:#28c840; }
.code { font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 0.82rem; line-height: 1.9; position:relative; }
.code .ln { display:block; color: var(--text-dim); white-space: pre; }
.code .k { color: #5aa9ff; } .code .s { color: #1fbeff; } .code .c { color: var(--text-mute); } .code .v { color: #7dd3fc; } .code .f { color:#a5f3fc; }

.platform-row { display:flex; flex-wrap:wrap; gap:10px; margin-top:22px; position:relative; }
.platform-chip { font-size:.78rem; font-weight:600; padding:6px 13px; border-radius:100px; border:1px solid var(--border-2); color: var(--text-dim); background: rgba(255,255,255,0.02); }

/* ---------- Logos / trust strip ---------- */
.trust { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 30px 0; }
.trust-inner { display:flex; align-items:center; gap: 38px; flex-wrap: wrap; justify-content:center; }
.trust-inner .label { font-size: .8rem; letter-spacing:.16em; text-transform:uppercase; color: var(--text-mute); }
.trust-inner .name { font-family: var(--font-head); font-weight:600; color: var(--text-dim); font-size: 1.05rem; opacity:.85; }

/* ---------- Cards / grid ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: linear-gradient(165deg, var(--surface), var(--bg-2));
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px; transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-5px); border-color: var(--border-2); box-shadow: 0 20px 50px rgba(0,0,0,0.4); }
.card .icon {
  width: 50px; height: 50px; border-radius: 13px; display: grid; place-items: center;
  background: rgba(34,211,238,0.10); border: 1px solid var(--border-2); margin-bottom: 18px;
  color: var(--accent);
}
.card h3 { margin-bottom: 10px; }
.card p { font-size: 0.96rem; }
.card .tag-row { display:flex; flex-wrap:wrap; gap:8px; margin-top:16px; }
.card .tag { font-size:.74rem; font-weight:600; padding:5px 11px; border-radius:100px; background:rgba(59,130,246,0.10); color:#93c5fd; border:1px solid rgba(59,130,246,0.2); }

/* feature list */
.feature-list { list-style:none; display:grid; gap:14px; }
.feature-list li { display:flex; gap:13px; align-items:flex-start; color: var(--text-dim); }
.feature-list li .check {
  flex:none; width:24px; height:24px; border-radius:7px; display:grid; place-items:center; margin-top:2px;
  background: rgba(34,211,238,0.12); color: var(--accent); border:1px solid var(--border-2); font-size:.8rem;
}
.feature-list li b { color: var(--text); font-weight:600; }

/* ---------- Process steps ---------- */
.steps { display:grid; grid-template-columns: repeat(4,1fr); gap:22px; }
.step { position:relative; padding-top: 14px; }
.step .n { font-family: var(--font-head); font-size: 2.4rem; font-weight:600; color: transparent; -webkit-text-stroke:1.5px var(--accent-2); opacity:.6; }
.step h3 { margin: 8px 0 8px; font-size:1.1rem; }
.step p { font-size:.92rem; }

/* ---------- Split section ---------- */
.split { display:grid; grid-template-columns: 1fr 1fr; gap:54px; align-items:center; }

/* ---------- CTA band ---------- */
.cta {
  border-radius: 24px; padding: 56px; text-align:center;
  background: linear-gradient(150deg, rgba(31,190,255,0.12), rgba(10,99,214,0.12));
  border: 1px solid var(--border-2); position:relative; overflow:hidden;
}
.cta h2 { margin-bottom: 14px; }
.cta p { max-width: 540px; margin: 0 auto 28px; }
.cta .hero-actions { justify-content:center; }

/* ---------- Contact ---------- */
.contact-grid { display:grid; grid-template-columns: 1fr 1fr; gap: 44px; }
.contact-item { display:flex; gap:16px; align-items:flex-start; padding: 18px 0; border-bottom:1px solid var(--border); }
.contact-item .ic { width:44px; height:44px; flex:none; border-radius:11px; display:grid; place-items:center; background:rgba(34,211,238,0.10); border:1px solid var(--border-2); color:var(--accent); }
.contact-item .label { font-size:.78rem; text-transform:uppercase; letter-spacing:.12em; color:var(--text-mute); }
.contact-item .val { font-weight:600; color:var(--text); }
.contact-item a.val:hover { color: var(--accent); }

form .row { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
form label { display:block; font-size:.85rem; color:var(--text-dim); margin:16px 0 7px; font-weight:500; }
form input, form textarea {
  width:100%; background: var(--surface); border:1px solid var(--border-2); border-radius:11px;
  padding:13px 15px; color:var(--text); font-family:inherit; font-size:.95rem; transition:border-color .2s;
}
form input:focus, form textarea:focus { outline:none; border-color: var(--accent); }
form textarea { resize:vertical; min-height:130px; }
.form-note { font-size:.82rem; color:var(--text-mute); margin-top:14px; }

/* ---------- Footer ---------- */
.footer { border-top:1px solid var(--border); padding: 56px 0 34px; margin-top: 40px; }
.footer-grid { display:grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer p { font-size:.92rem; max-width: 320px; margin-top:14px; }
.footer h4 { font-family:var(--font-body); font-size:.8rem; text-transform:uppercase; letter-spacing:.12em; color:var(--text-mute); margin-bottom:16px; }
.footer ul { list-style:none; display:grid; gap:10px; }
.footer ul a { color:var(--text-dim); font-size:.94rem; }
.footer ul a:hover { color: var(--accent); }
.footer-bottom { display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap; padding-top:24px; border-top:1px solid var(--border); font-size:.85rem; color:var(--text-mute); }

/* ---------- Page hero (inner pages) ---------- */
.page-hero { padding: 70px 0 30px; }
.page-hero h1 { margin: 18px 0 16px; }
.page-hero p { font-size: 1.1rem; max-width: 620px; }

/* ---------- Animations ---------- */
.reveal { opacity:0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity:1; transform:none; }

/* ---------- Language visibility ---------- */
[data-lang-en] { display: none; }
body.en [data-lang-pl] { display: none; }
body.en [data-lang-en] { display: revert; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-grid, .split, .contact-grid { grid-template-columns: 1fr; }
  .grid-3, .grid-4, .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-visual { order: -1; }
  .section { padding: 70px 0; }
}
@media (max-width: 640px) {
  .nav-links {
    position: fixed; inset: 70px 0 auto 0; flex-direction: column; align-items: stretch; gap: 4px;
    background: rgba(7,10,18,0.97); backdrop-filter: blur(14px); padding: 16px 24px 24px;
    border-bottom: 1px solid var(--border); transform: translateY(-130%); transition: transform .3s ease;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 13px 16px; }
  .nav-toggle { display: flex; }
  .grid-2, .grid-3, .grid-4, .steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  form .row { grid-template-columns: 1fr; }
  .cta { padding: 40px 24px; }
  .hero-stats { gap: 24px; }
}