/* P.EN — spoločný dizajnový systém pre pen.industries a petrasen.com (návrh 21. 10. 2026) */
:root {
  --red: #a50808;
  --red-dark: #7e0606;
  --red-soft: #fbeeee;
  --ink: #1d1f22;
  --ink-2: #3a3d42;
  --muted: #6b7078;
  --line: #e3e5e8;
  --paper: #ffffff;
  --paper-2: #f5f6f7;
  --night: #121417;
  --radius: 4px;
  --wrap: 1200px;
  --head: "Barlow", "Segoe UI", system-ui, sans-serif;
  --body: "Inter", "Segoe UI", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font: 400 17px/1.6 var(--body); color: var(--ink); background: var(--paper); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
h1, h2, h3 { font-family: var(--head); font-weight: 600; line-height: 1.1; margin: 0; letter-spacing: -0.01em; }
h1 { font-size: clamp(38px, 5.4vw, 68px); }
h2 { font-size: clamp(30px, 3.6vw, 46px); }
h3 { font-size: 22px; }
p { margin: 0; }
.eyebrow { font: 600 13px/1 var(--head); letter-spacing: .18em; text-transform: uppercase; color: var(--red); display: flex; align-items: center; gap: 12px; }
.eyebrow::before { content: ""; width: 28px; height: 2px; background: var(--red); }
.lead { font-size: 20px; color: var(--ink-2); max-width: 640px; }

/* hlavička */
.top { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 32px; height: 76px; }
.top .logo img { height: 34px; width: auto; }
.top nav { display: flex; gap: 28px; margin-left: auto; }
.top nav a { text-decoration: none; font: 500 15px var(--head); letter-spacing: .02em; color: var(--ink-2); }
.top nav a:hover { color: var(--red); }
.lang { display: flex; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.lang button { border: 0; background: none; font: 600 12px var(--head); letter-spacing: .08em; padding: 7px 10px; cursor: pointer; color: var(--muted); }
.lang button[aria-pressed="true"] { background: var(--ink); color: #fff; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 24px; border-radius: var(--radius); font: 600 15px var(--head); letter-spacing: .04em; text-decoration: none; border: 1.5px solid var(--red); background: var(--red); color: #fff; transition: background .15s; }
.btn:hover { background: var(--red-dark); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: #fff; }
.btn.light { background: transparent; border-color: rgba(255,255,255,.7); color: #fff; }
.btn.light:hover { background: #fff; color: var(--ink); }
.btn::after { content: "→"; }

/* sekcie */
section { padding: 110px 0; }
.sec-head { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: end; margin-bottom: 56px; }
.sec-head h2 { margin-top: 18px; }
.sec-head p { color: var(--muted); }
.alt { background: var(--paper-2); }
.dark { background: var(--night); color: #e9eaec; }
.dark .sec-head p, .dark .muted { color: #9ba0a8; }

/* karty */
.grid { display: grid; gap: 24px; }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
.g2 { grid-template-columns: repeat(2, 1fr); }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; position: relative; transition: border-color .15s, transform .15s; }
.card:hover { border-color: var(--red); transform: translateY(-2px); }
.card .no { font: 600 13px var(--head); color: var(--red); letter-spacing: .1em; }
.card h3 { margin: 18px 0 10px; }
.card p { color: var(--muted); font-size: 15.5px; }
.card .ico { width: 44px; height: 44px; color: var(--red); }
.tag { display: inline-block; font: 600 11px var(--head); letter-spacing: .12em; text-transform: uppercase; padding: 5px 9px; border-radius: 2px; background: var(--red-soft); color: var(--red); }
.tag.grey { background: var(--paper-2); color: var(--muted); }
.dark .card { background: #1a1d21; border-color: #2a2e34; }
.dark .card p { color: #9ba0a8; }

/* pruh s heslom */
.statement { background: var(--red); color: #fff; padding: 90px 0; }
.statement .wrap { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.statement h2 { font-size: clamp(34px, 4.6vw, 60px); max-width: 760px; }

/* pätička */
footer { background: var(--night); color: #9ba0a8; padding: 64px 0 40px; font-size: 14.5px; }
footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
footer h4 { font: 600 13px var(--head); letter-spacing: .14em; text-transform: uppercase; color: #fff; margin: 0 0 16px; }
footer a { text-decoration: none; display: block; padding: 3px 0; }
footer a:hover { color: #fff; }
footer .base { border-top: 1px solid #2a2e34; margin-top: 48px; padding-top: 24px; display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.draft { position: fixed; bottom: 14px; left: 14px; z-index: 50; background: var(--ink); color: #fff; font: 600 11px var(--head); letter-spacing: .12em; text-transform: uppercase; padding: 7px 11px; border-radius: 3px; opacity: .85; }

@media (max-width: 960px) {
  .g3, .g4 { grid-template-columns: repeat(2, 1fr); }
  .sec-head { grid-template-columns: 1fr; gap: 20px; }
  footer .cols { grid-template-columns: 1fr 1fr; }
  .top nav { display: none; }
  .top .lang { margin-left: auto; }
}
@media (max-width: 620px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .g2, .g3, .g4 { grid-template-columns: 1fr; }
  section { padding: 76px 0; }
  .top .wrap { height: 64px; gap: 16px; }
  .top .logo img { height: 26px; }
  .top .btn { display: none; }
  footer .cols { grid-template-columns: 1fr; }
}