/* ──────────────────────────────────────────────────────────────
   jaroslavtrsek.cz — design systém „jt.cz"
   Ink škála (primární) + green akcent. Ploché plochy, bez stínů.
   Fonty: Inter (text), JetBrains Mono (štítky, technické detaily).
   ────────────────────────────────────────────────────────────── */

/* ── Self-hostované fonty (variabilní woff2) ───────────────────── */
/* Inter — latin */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url(fonts/inter-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* Inter — latin-ext (česká diakritika) */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url(fonts/inter-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* JetBrains Mono — latin */
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400 500;
  font-display: swap;
  src: url(fonts/jetbrains-mono-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* JetBrains Mono — latin-ext (česká diakritika) */
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400 500;
  font-display: swap;
  src: url(fonts/jetbrains-mono-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  /* Ink — primární škála */
  --ink-50:#F6F8FA; --ink-100:#E6EAF0; --ink-200:#CBD4DE; --ink-300:#A5B2C2; --ink-400:#7A8CA3;
  --ink-500:#47617C; --ink-600:#35495E; --ink-700:#24303F; --ink-800:#1A2332; --ink-900:#0F151D;
  /* Green — akcent */
  --green-100:#E3F5EC; --green-300:#94D8B8; --green-400:#66C79B; --green-500:#42B883; --green-600:#359A6D; --green-700:#2A7D57;
  --white:#FFFFFF;

  /* Aliasy */
  --bg-page:var(--ink-50); --bg-surface:var(--white); --bg-dark:var(--ink-800);
  /* --text-muted ztmaveno z ink-400 (#7A8CA3) kvuli WCAG AA: #5C6E85 = 4,9:1 na #F6F8FA, 5,2:1 na bile. */
  --text-primary:var(--ink-800); --text-secondary:var(--ink-500); --text-muted:#5C6E85;
  --text-on-dark:var(--ink-50); --text-on-dark-secondary:var(--ink-200);
  --text-on-green:var(--ink-900);
  --border-subtle:var(--ink-100); --border-strong:var(--ink-200); --border-on-dark:var(--ink-600);
  /* --link ztmaveno z green-600 (#359A6D, 3,5:1) na green-700 kvuli WCAG AA: #2A7D57 = 5,0:1 na bile; hover jeste tmavsi. */
  --link:var(--green-700); --link-hover:#215F41;
  --accent:var(--green-500); --accent-hover:var(--green-600); --accent-active:var(--green-700);
  --focus-ring:var(--green-500);

  /* Typografie */
  --font-sans:Inter,system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

  /* Rozvržení */
  --container:1040px; --container-x:32px; --container-x-mobile:24px;
  --section-y:96px; --section-y-mobile:56px; --header-h:64px;
  --radius-sm:6px; --radius-md:8px; --radius-lg:12px;
  --measure:38em;

  /* Animace */
  --ease:cubic-bezier(.2,.7,.2,1); --dur:.28s;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }
html.menu-open { overflow: hidden; }

body {
  margin: 0;
  background: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 28px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; }

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 3px;
  border-radius: var(--radius-md);
}

h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0; }

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

/* ─── Layout primitives ────────────────────────────────── */
.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--container-x);
}

.section { padding: var(--section-y) 0; }
.section--page    { background: var(--bg-page); }
.section--surface { background: var(--bg-surface); }
.section--dark    { background: var(--bg-dark); color: var(--text-on-dark); }

.section__inner { display: flex; flex-direction: column; gap: 32px; }
.section__title { font-size: 28px; line-height: 36px; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 20px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ─── Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 48px;
  padding: 0 24px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  box-sizing: border-box;
}
.btn:hover { text-decoration: none; }

.btn--primary { background: var(--accent); color: var(--text-on-green); }
.btn--primary:hover  { background: var(--accent-hover);  color: var(--text-on-green); }
.btn--primary:active { background: var(--accent-active); color: var(--text-on-green); }

.btn--secondary {
  padding: 0 22px;
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  font-weight: 500;
}
.btn--secondary:hover { border-color: var(--ink-300); background: var(--ink-50); color: var(--text-primary); }
.btn--secondary .ext { color: var(--text-muted); }

/* ─── Pills & tags ─────────────────────────────────────── */
.pill-row, .tag-row { display: flex; flex-wrap: wrap; gap: 8px; }

.pill {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 12px;
  border-radius: var(--radius-md);
  background: var(--ink-100);
  color: var(--ink-600);
  font-family: var(--font-mono);
  font-size: 14px;
}

.tag {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 10px;
  border-radius: var(--radius-sm);
  background: var(--ink-100);
  color: var(--ink-600);
  font-family: var(--font-mono);
  font-size: 13px;
}
.tag--outline { background: transparent; border: 1px solid var(--border-on-dark); color: var(--text-on-dark-secondary); height: 32px; padding: 0 12px; border-radius: var(--radius-md); font-size: 14px; }

.field-label { font-size: 14px; line-height: 20px; font-weight: 500; color: var(--text-muted); }

/* ─── Header ───────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.site-header__inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-header__logo { display: flex; align-items: center; height: 32px; }
.site-header__logo img { height: 26px; width: auto; display: block; }
.site-header__logo .site-header__logo-inverse { display: none; }

.site-nav { display: flex; gap: 32px; font-size: 15px; font-weight: 500; }
.site-nav a { color: var(--ink-600); }
.site-nav a:hover { color: var(--text-primary); text-decoration: none; }

.burger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-right: -10px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  color: var(--text-primary);
  position: relative;
  z-index: 30;
  border-radius: var(--radius-md);
}
.burger:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
.burger__box { position: relative; display: block; width: 20px; height: 14px; }
.burger__line {
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: top var(--dur) var(--ease), transform var(--dur) var(--ease), opacity .18s var(--ease);
}
.burger__line:nth-child(1) { top: 0; }
.burger__line:nth-child(2) { top: 6px; }
.burger__line:nth-child(3) { top: 12px; }
.site-header[data-menu-open="true"] .burger__line:nth-child(1) { top: 6px; transform: rotate(45deg); }
.site-header[data-menu-open="true"] .burger__line:nth-child(2) { opacity: 0; transform: scaleX(.4); }
.site-header[data-menu-open="true"] .burger__line:nth-child(3) { top: 6px; transform: rotate(-45deg); }

.site-nav--mobile { display: none; }

/* ─── Hero ─────────────────────────────────────────────── */
.hero__inner {
  padding-top: var(--section-y);
  padding-bottom: var(--section-y);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 48px;
  align-items: center;
  overflow: hidden;
}
.hero__content { display: flex; flex-direction: column; gap: 20px; }
.hero__headings { display: flex; flex-direction: column; gap: 12px; }
.hero__name { font-size: 44px; line-height: 52px; color: var(--text-primary); }
.hero__role { font-size: 20px; line-height: 28px; font-weight: 600; color: var(--ink-600); }
.hero__tagline { max-width: 34em; color: var(--text-secondary); }
.hero__actions { display: flex; gap: 12px; margin-top: 8px; flex-wrap: wrap; }
.hero__mark { display: flex; justify-content: flex-end; }
.hero__mark svg { display: block; }

/* ─── Prose ────────────────────────────────────────────── */
.prose { display: flex; flex-direction: column; gap: 20px; max-width: var(--measure); }

/* ─── Cards (Reference) ────────────────────────────────── */
.cards { display: grid; grid-template-columns: 1fr; gap: 24px; }
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.card__head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; }
.card__title { font-size: 20px; line-height: 28px; }
.card__year { font-family: var(--font-mono); font-size: 14px; color: var(--text-muted); }
.card__text { color: var(--ink-600); font-size: 16px; line-height: 26px; }
.card__link { font-weight: 500; margin-top: auto; }

/* ─── Produkt (dark) ───────────────────────────────────── */
.product__inner { display: grid; grid-template-columns: minmax(0, 1fr); gap: 32px; }
.product__head { display: flex; flex-direction: column; gap: 12px; }
.product__eyebrow { color: var(--ink-300); }
.product__title { font-size: 28px; line-height: 36px; color: var(--white); }
.product__text { max-width: var(--measure); color: var(--text-on-dark-secondary); }

/* ─── Kontakt ──────────────────────────────────────────── */
.contact__head { display: flex; flex-direction: column; gap: 12px; }
.contact__lead { color: var(--ink-500); max-width: 34em; }
.contact__actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.contact__meta {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 32px;
  font-size: 14px;
  line-height: 20px;
  color: var(--text-muted);
}
.contact__meta > div { display: flex; gap: 6px; }
.contact__meta dt, .contact__meta dd { margin: 0; }
.contact__meta dt::after { content: ":"; }
.contact__meta a { color: inherit; text-decoration: underline; text-decoration-color: var(--ink-200); text-underline-offset: 2px; }
.contact__meta a:hover { color: var(--link); text-decoration-color: currentColor; }

/* ─── Footer ───────────────────────────────────────────── */
.site-footer { background: var(--bg-page); border-top: 1px solid var(--border-subtle); }
.site-footer__inner {
  padding-top: 40px;
  padding-bottom: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 14px;
  line-height: 20px;
  color: var(--text-muted);
}
.site-footer__inner img { height: 20px; width: auto; display: block; opacity: 0.7; }

/* ─── Responsive (≤ 760px) ─────────────────────────────── */
@media (max-width: 760px) {
  .wrap { padding: 0 var(--container-x-mobile); }

  .site-nav { display: none; }
  .burger { display: inline-flex; }

  /* Mobilní menu — tmavý fullscreen overlay */
  .site-nav--mobile {
    position: fixed;
    top: var(--header-h); left: 0; right: 0; bottom: 0;
    z-index: 20;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 24px var(--container-x-mobile) calc(32px + env(safe-area-inset-bottom));
    background: var(--bg-dark);
    color: var(--white);
    opacity: 0;
    transform: translateY(-12px);
    visibility: hidden;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility 0s linear var(--dur);
  }
  .site-header[data-menu-open="true"] .site-nav--mobile {
    opacity: 1;
    transform: none;
    visibility: visible;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  }
  .site-nav--mobile__links { display: flex; flex-direction: column; counter-reset: nav; }
  .site-nav--mobile__links a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 0;
    font-size: 28px;
    line-height: 36px;
    font-weight: 600;
    color: var(--white);
    border-bottom: 1px solid var(--ink-700);
    counter-increment: nav;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity .3s var(--ease), transform .3s var(--ease);
  }
  .site-nav--mobile__links a::after {
    content: "0" counter(nav);
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 20px;
    color: var(--ink-400);
  }
  .site-nav--mobile__links a:focus-visible { outline: 2px solid var(--ink-300); outline-offset: 4px; border-radius: var(--radius-sm); }
  .site-header[data-menu-open="true"] .site-nav--mobile__links a { opacity: 1; transform: none; }
  .site-header[data-menu-open="true"] .site-nav--mobile__links a:nth-child(2) { transition-delay: .05s; }
  .site-header[data-menu-open="true"] .site-nav--mobile__links a:nth-child(3) { transition-delay: .1s; }
  .site-nav--mobile__footer { display: flex; flex-direction: column; gap: 4px; font-family: var(--font-mono); font-size: 14px; line-height: 20px; color: var(--ink-400); }
  .site-nav--mobile__footer a { color: var(--ink-200); }

  /* Header sjednocený s panelem, když je menu otevřené */
  .site-header[data-menu-open="true"] { background: var(--bg-dark); border-color: var(--ink-700); color: var(--white); }
  .site-header[data-menu-open="true"] .burger { color: var(--white); }
  .site-header[data-menu-open="true"] .site-header__logo-default { display: none; }
  .site-header[data-menu-open="true"] .site-header__logo-inverse { display: block; }

  .section { padding: var(--section-y-mobile) 0; }

  .hero__inner { grid-template-columns: 1fr; padding: 36px 24px 32px; gap: 24px; }
  .hero__mark { display: none; }
  .hero__name { font-size: 36px; line-height: 42px; }

  .hero__actions, .contact__actions { flex-direction: column; align-items: stretch; }
  .hero__actions .btn, .contact__actions .btn { width: 100%; justify-content: center; }

  .site-footer__inner { padding: 24px; }
}

/* ─── Omezení pohybu ───────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0s !important; animation-duration: 0s !important; }
}