/* ===================================================
   JJ BROS — Design tokens
   Black / white / chrome, s industriálním "signal" akcentem
=================================================== */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Work+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --black: #0a0a0a;
  --white: #ffffff;
  --paper: #f2f0ec;
  --steel: #6b6e73;
  --steel-light: #a5a8ac;
  --line: #dcdad4;
  --line-dark: #2a2a2a;
  --signal: #ffc53d;

  --display: 'Bebas Neue', sans-serif;
  --body: 'Work Sans', sans-serif;
  --mono: 'IBM Plex Mono', monospace;

  --max: 1180px;
  --edge: clamp(24px, 5vw, 64px);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--black);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

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

/* ---------- Typography ---------- */

h1, h2, h3, .display {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.01em;
  line-height: 0.92;
  font-weight: 400;
}

h1 { font-size: clamp(2.6rem, 7vw, 5.4rem); }
h2 { font-size: clamp(2rem, 4.4vw, 3.4rem); }
h3 { font-size: clamp(1.3rem, 2.4vw, 1.7rem); }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
  display: flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: '';
  width: 7px; height: 7px;
  background: var(--signal);
}

p.lead {
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  color: #333;
  max-width: 46ch;
}

.mono { font-family: var(--mono); }

/* ---------- Chrome text effect (echoes logo) ---------- */

.chrome {
  background: linear-gradient(180deg, #fff 0%, #cfd0d2 38%, #7c7d80 52%, #efefef 63%, #9a9b9d 80%, #ffffff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 1px 0 rgba(0,0,0,0.4));
}

/* ---------- Hazard stripe divider (signature motif) ---------- */

.hazard {
  height: 10px;
  background: repeating-linear-gradient(
    135deg,
    var(--black) 0 18px,
    var(--signal) 18px 36px
  );
}

/* ---------- Registration / crosshair marks (signature motif) ---------- */

.reg {
  position: absolute;
  width: 18px;
  height: 18px;
  pointer-events: none;
}
.reg::before, .reg::after {
  content: '';
  position: absolute;
  background: currentColor;
}
.reg::before { width: 100%; height: 1px; top: 50%; left: 0; }
.reg::after { width: 1px; height: 100%; left: 50%; top: 0; }
.reg.tl { top: 18px; left: var(--edge); }
.reg.tr { top: 18px; right: var(--edge); }
.reg.bl { bottom: 18px; left: var(--edge); }
.reg.br { bottom: 18px; right: var(--edge); }

/* ---------- Header / nav ---------- */

.site-header {
  background: var(--black);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line-dark);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px var(--edge);
  max-width: var(--max);
  margin: 0 auto;
}

.nav-logo img { height: 40px; width: auto; }

.nav-links {
  display: flex;
  gap: clamp(16px, 3vw, 36px);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav-links a {
  position: relative;
  padding-bottom: 4px;
  color: var(--steel-light);
  transition: color 0.15s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--white); }
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--signal);
}

.nav-cta {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--signal);
  color: var(--black);
  padding: 10px 18px;
  white-space: nowrap;
  transition: background 0.15s ease;
}
.nav-cta:hover { background: var(--white); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.6rem;
  cursor: pointer;
}

@media (max-width: 760px) {
  .nav-links { 
    position: fixed; top: 73px; left: 0; right: 0; bottom: 0;
    background: var(--black);
    flex-direction: column;
    padding: 40px var(--edge);
    gap: 28px;
    font-size: 1.1rem;
    transform: translateX(100%);
    transition: transform 0.25s ease;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-toggle { display: block; }
  .nav-cta { display: none; }
  .nav-links.open .nav-cta-mobile { display: inline-block; }
}

/* ---------- Hero ---------- */

.hero {
  background: var(--black);
  color: var(--white);
  position: relative;
  padding: clamp(70px, 12vw, 140px) var(--edge) clamp(60px, 9vw, 100px);
  overflow: hidden;
}
.hero .wrap { padding: 0; position: relative; z-index: 2; }
.hero .reg { color: rgba(255,255,255,0.35); }

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 70% 30%, black, transparent 75%);
}

.hero h1 { max-width: 14ch; margin-top: 18px; }
.hero p.lead { color: var(--steel-light); margin-top: 22px; }

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 36px;
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 14px 26px;
  border: 1px solid currentColor;
  transition: background 0.15s ease, color 0.15s ease;
}
.btn-signal {
  background: var(--signal);
  color: var(--black);
  border-color: var(--signal);
}
.btn-signal:hover { background: var(--white); border-color: var(--white); }
.btn-outline-light {
  color: var(--white);
  border-color: rgba(255,255,255,0.4);
}
.btn-outline-light:hover { background: var(--white); color: var(--black); }
.btn-outline-dark {
  color: var(--black);
  border-color: var(--black);
}
.btn-outline-dark:hover { background: var(--black); color: var(--white); }

/* ---------- Sections ---------- */

section { position: relative; }

.section {
  padding: clamp(56px, 9vw, 110px) var(--edge);
}
.section .wrap { padding: 0; }

.section-dark { background: var(--black); color: var(--white); }
.section-paper { background: var(--paper); }
.section-white { background: var(--white); }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: clamp(32px, 5vw, 56px);
  flex-wrap: wrap;
}
.section-head h2 { margin-top: 10px; }

/* ---------- Cards / grids ---------- */

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.section-dark .grid-3 { background: var(--line-dark); border-color: var(--line-dark); }

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (max-width: 760px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--paper);
  padding: 32px 28px;
}
.section-white .card, .section-white .grid-3, .section-white .grid-2 { background: var(--white); }
.section-dark .card { background: var(--black); }

.card .num {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--signal);
  letter-spacing: 0.05em;
}
.card h3 { margin-top: 14px; }
.card p { margin-top: 12px; color: var(--steel); font-size: 0.95rem; }
.section-dark .card p { color: var(--steel-light); }

/* ---------- Footer ---------- */

.site-footer {
  background: var(--black);
  color: var(--steel-light);
  padding: 50px var(--edge) 28px;
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 40px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line-dark);
}
.footer-logo img { height: 34px; margin-bottom: 14px; }
.footer-col h4 {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal);
  margin-bottom: 14px;
}
.footer-col a, .footer-col p {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 8px;
  color: var(--steel-light);
}
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 22px;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--steel);
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Misc utility ---------- */

.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid var(--steel);
  color: var(--steel);
  padding: 4px 10px;
  margin: 4px 6px 4px 0;
}

.stat {
  font-family: var(--mono);
}
.stat .n {
  font-family: var(--display);
  font-size: clamp(2.6rem, 5vw, 4rem);
  display: block;
  line-height: 1;
}
.stat .l {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-hero {
  background: var(--black);
  color: var(--white);
  padding: clamp(60px, 9vw, 100px) var(--edge) clamp(40px, 6vw, 64px);
  position: relative;
}
.page-hero .reg { color: rgba(255,255,255,0.35); }
.page-hero h1 { margin-top: 14px; max-width: 20ch; }
.page-hero p.lead { color: var(--steel-light); margin-top: 18px; }

form.contact-form {
  display: grid;
  gap: 18px;
  max-width: 560px;
}
.field label {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 8px;
}
.field input, .field textarea {
  width: 100%;
  background: transparent;
  border: 1px solid var(--line);
  padding: 13px 14px;
  font-family: var(--body);
  font-size: 0.95rem;
  color: var(--black);
}
.section-dark .field input, .section-dark .field textarea {
  border-color: var(--line-dark);
  color: var(--white);
}
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--signal);
}
.field textarea { resize: vertical; min-height: 130px; }