/* ------------------------------------------------------------------
   Ladislav Balon — reprezentativní web
   Čistý HTML/CSS/JS, žádné závislosti, žádný build krok.
------------------------------------------------------------------- */

:root {
  --bg: #0b0d12;
  --bg-alt: #10131a;
  --ink: #e8eaf0;
  --ink-dim: #9aa3b5;
  --line: #232833;
  --accent: #5eead4;
  --accent-ink: #06201b;
  --card: #12151d;
  --radius: 10px;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --wrap: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(94, 234, 212, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(94, 234, 212, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 0%, transparent 70%);
}

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

a { color: inherit; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 100;
  font-weight: 600;
}
.skip-link:focus { left: 0; }

.muted { color: var(--ink-dim); }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 13, 18, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  letter-spacing: 0.02em;
}
.logo-dot { color: var(--accent); }

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.94rem;
}
.nav a {
  text-decoration: none;
  color: var(--ink-dim);
  transition: color 0.15s ease;
}
.nav a:hover { color: var(--ink); }
.nav-cta {
  color: var(--accent) !important;
  border: 1px solid rgba(94, 234, 212, 0.35);
  padding: 7px 14px;
  border-radius: 999px;
}
.nav-cta:hover { background: rgba(94, 234, 212, 0.08); }

.lang-switch {
  display: flex;
  align-items: center;
  gap: 2px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px;
}
.lang-link {
  text-decoration: none;
  color: var(--ink-dim);
  padding: 5px 10px;
  border-radius: 999px;
  transition: color 0.15s ease, background 0.15s ease;
}
.lang-link:hover { color: var(--ink); }
.lang-link.is-active {
  background: var(--accent);
  color: var(--accent-ink);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  margin: 0 8px;
  background: var(--ink);
  border-radius: 2px;
}

.mobile-nav {
  display: none;
  flex-direction: column;
  border-top: 1px solid var(--line);
  padding: 8px 24px 16px;
}
.mobile-nav a {
  text-decoration: none;
  color: var(--ink-dim);
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.mobile-nav a:last-child { border-bottom: none; }

.site-header.nav-open .mobile-nav { display: flex; }

@media (max-width: 760px) {
  .nav { display: none; }
  .nav-toggle { display: flex; }
}

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

.hero {
  padding: 96px 0 80px;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
  align-items: start;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-dim);
  margin: 0 0 20px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(94, 234, 212, 0.15);
}

h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.05;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}

.hero-role {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1.05rem;
  margin: 0 0 24px;
}

.hero-lead {
  font-size: 1.1rem;
  color: var(--ink-dim);
  max-width: 56ch;
  margin: 0 0 32px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 13px 24px;
  border-radius: 999px;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
}
.btn-primary:hover { transform: translateY(-2px); }
.btn-outline {
  border: 1px solid var(--line);
  color: var(--ink);
}
.btn-outline:hover { border-color: var(--accent); }

.hero-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}
.hero-card dl { margin: 0; }
.hero-card div + div { margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--line); }
.hero-card dt {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-dim);
  margin: 0 0 6px;
}
.hero-card dd { margin: 0; font-size: 0.96rem; overflow-wrap: break-word; }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
}

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

.section { padding: 88px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.kicker {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin: 0 0 12px;
}

h2 {
  font-size: clamp(1.8rem, 3.4vw, 2.4rem);
  margin: 0;
  letter-spacing: -0.01em;
}

.section-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.6fr;
  gap: 48px;
}

.section-body p { color: var(--ink-dim); font-size: 1.02rem; max-width: 68ch; }
.section-body p + p { margin-top: 18px; }

.section-heading-center { text-align: center; margin-bottom: 48px; }
.section-heading-center h2 { max-width: 40ch; margin: 0 auto; }
.section-heading-center .kicker { display: flex; justify-content: center; }

@media (max-width: 900px) {
  .section-grid { grid-template-columns: 1fr; gap: 20px; }
}

/* ---------- Cards (Služby) ---------- */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.2s ease-out, border-color 0.2s ease-out;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(94, 234, 212, 0.4);
}
.card-index {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.85rem;
  margin: 0 0 14px;
}
.card h3 { margin: 0 0 10px; font-size: 1.1rem; }
.card p { margin: 0; color: var(--ink-dim); font-size: 0.95rem; }

/* ---------- Tech stack ---------- */

.stack-list { display: flex; flex-direction: column; }
.stack-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.stack-row:first-child { padding-top: 0; }
.stack-label {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.9rem;
}
.stack-tags { color: var(--ink-dim); }

@media (max-width: 620px) {
  .stack-row { grid-template-columns: 1fr; gap: 6px; }
}

/* ---------- Reference ---------- */

.ref-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}
.ref-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--bg);
}
.ref-item h3 { margin: 0 0 6px; font-size: 1.05rem; }
.ref-item p { margin: 0; color: var(--ink-dim); font-size: 0.92rem; }

/* ---------- Kontakt ---------- */

.section-contact { padding: 96px 0; }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.contact-list { margin: 0; display: flex; flex-direction: column; gap: 20px; }
.contact-list dt {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-dim);
  margin: 0 0 4px;
}
.contact-list dd { margin: 0; font-size: 1.05rem; overflow-wrap: break-word; }
.contact-list a { text-decoration: none; border-bottom: 1px solid transparent; }
.contact-list a:hover { border-color: var(--accent); color: var(--accent); }

@media (max-width: 760px) {
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
}

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

.site-footer { border-top: 1px solid var(--line); padding: 28px 0; }
.footer-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--ink-dim);
}