/* Zdeněk Faltýn – styl webu podle návrhu (úvod varianta C – Tma) */

@font-face {
  font-family: "Josefin Sans";
  src: url("/assets/fonts/josefin-sans-latin-ext-wght-normal.woff2") format("woff2-variations");
  font-weight: 100 700;
  font-display: swap;
  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;
}
@font-face {
  font-family: "Josefin Sans";
  src: url("/assets/fonts/josefin-sans-latin-wght-normal.woff2") format("woff2-variations");
  font-weight: 100 700;
  font-display: swap;
  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+2190-2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Work Sans";
  src: url("/assets/fonts/work-sans-latin-ext-wght-normal.woff2") format("woff2-variations");
  font-weight: 100 900;
  font-display: swap;
  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;
}
@font-face {
  font-family: "Work Sans";
  src: url("/assets/fonts/work-sans-latin-wght-normal.woff2") format("woff2-variations");
  font-weight: 100 900;
  font-display: swap;
  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+2190-2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --bg: #fbfbfa;
  --ink: #141414;
  --line: #e4e4e1;
  --tint: #f2f2f0;
  --muted: #4a4a48;
  --dark: #111110;
  --on-dark: #f4f4f2;
  --accent: #c3431a; /* ztmaveno z #e2562a kvůli kontrastu malého textu (4,5:1) */
  --accent-dark: #f07a50;
  --display: "Josefin Sans", sans-serif;
  --gutter: clamp(16px, 4vw, 40px);
  --section-y: clamp(56px, 8vw, 110px);
  --max: 1240px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
html.lightbox-open { overflow: hidden; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Work Sans", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--accent); }
img { display: block; max-width: 100%; height: auto; }
p, h1, h2, h3, ol, address { margin: 0; }
address { font-style: normal; }
button { font: inherit; color: inherit; }

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

.skip-link {
  position: fixed; top: 8px; left: 8px; z-index: 40;
  padding: 10px 16px; background: var(--ink); color: var(--bg);
  transform: translateY(-200%);
}
.skip-link:focus { transform: none; color: var(--bg); }

/* Hlavička */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(251, 251, 250, 0.94);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  max-width: var(--max); margin: 0 auto;
  padding: 12px var(--gutter);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 10px 28px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 40px; width: auto; }
.brand span {
  font-family: var(--display); font-weight: 400; font-size: 17px;
  letter-spacing: 0.16em; text-transform: uppercase; padding-top: 3px;
}
.site-nav {
  display: flex; flex-wrap: wrap; gap: 4px 24px; padding-top: 3px;
  font-family: var(--display); font-size: 14px; letter-spacing: 0.14em; text-transform: uppercase;
}

.site-nav a[aria-current="true"] { color: var(--accent); text-decoration: underline; text-underline-offset: 5px; }

/* Tlačítka */
.button {
  display: inline-block; cursor: pointer; border: 0;
  padding: 14px 26px;
  font-family: var(--display); font-size: 14px; letter-spacing: 0.16em; text-transform: uppercase;
}
.button--light { color: var(--dark); background: var(--on-dark); }
.button--light:hover { color: #fff; background: var(--accent); }
.button--ghost { border: 1px solid var(--on-dark); color: var(--on-dark); padding: 13px 25px; }
.button--ghost:hover { color: var(--dark); background: var(--on-dark); }
.button--outline { border: 1px solid var(--ink); background: transparent; color: var(--ink); padding: 14px 28px; }
.button--outline:hover { background: var(--ink); color: var(--bg); }

/* Tmavý úvod */
.hero { background: var(--dark); color: var(--on-dark); overflow: hidden; }
.hero__inner {
  max-width: var(--max); margin: 0 auto;
  padding: clamp(56px, 9vw, 110px) var(--gutter) 40px;
  display: flex; flex-direction: column; gap: 28px;
}
.hero__labels {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px;
  font-family: var(--display); font-size: 13px; letter-spacing: 0.3em; text-transform: uppercase;
  color: #bdbdb8;
}
.hero__accent { color: var(--accent-dark); }
.hero h1 {
  font-family: var(--display); font-weight: 200;
  font-size: clamp(48px, 11.5vw, 150px); line-height: 1.04; letter-spacing: 0.02em;
  text-transform: uppercase;
  border-top: 1px solid var(--on-dark); border-bottom: 1px solid var(--on-dark);
  padding: 0.26em 0 0.03em;
}
.hero h1 { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.hero h1 span { flex: none; }
/* Nadpis má nahoře o 0,23em větší odsazení (háček nad Ě), logo se proto vrací o polovinu výš. */
.hero__logo { flex: 0 1 clamp(104px, 31%, 380px); min-width: 0; width: 100%; height: auto; position: relative; top: -0.115em; }
.hero__intro {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 24px;
}
.hero__intro p {
  max-width: 520px; font-size: 18px; line-height: 1.55; color: #dcdcd8; text-wrap: pretty;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero__actions .button { display: inline-flex; align-items: center; padding: 17px 32px; font-size: 15px; }
.hero__actions .button--ghost { padding: 16px 31px; }
.hero__strip {
  display: flex; gap: 10px; padding: 0 0 40px; overflow-x: auto;
  scrollbar-color: #3a3a38 transparent; scrollbar-width: thin;
}
.hero__strip:focus-visible { outline-color: var(--accent-dark); outline-offset: -2px; }
.hero__strip img { height: clamp(140px, 20vw, 240px); width: auto; max-width: none; flex: none; }

/* Sekce */
.section { scroll-margin-top: 70px; border-bottom: 1px solid var(--line); }
.section--tint { background: var(--tint); }
.container {
  max-width: var(--max); margin: 0 auto;
  padding: var(--section-y) var(--gutter);
}
.container--split, .split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr));
  gap: clamp(32px, 5vw, 72px);
}
.container--stack { display: flex; flex-direction: column; gap: 36px; }
.container--drones { gap: 48px; }
.section__head { display: flex; flex-direction: column; gap: 20px; }
.eyebrow {
  font-family: var(--display); font-weight: 400; font-size: 13px; letter-spacing: 0.3em;
  text-transform: uppercase; color: var(--accent);
}
.eyebrow--dark { color: var(--accent-dark); }
.section h2 {
  font-family: var(--display); font-weight: 300;
  font-size: clamp(32px, 4vw, 52px); line-height: 1.05; letter-spacing: 0.03em;
  text-transform: uppercase;
}
.prose { display: flex; flex-direction: column; gap: 18px; font-size: 17px; line-height: 1.65; text-wrap: pretty; }
.lead { font-size: 17px; line-height: 1.65; max-width: 460px; text-wrap: pretty; }

.diploma {
  display: flex; gap: 16px; align-items: center;
  padding-top: 12px; border-top: 1px solid var(--line);
  font-size: 14px; line-height: 1.5; color: #555;
}
.diploma a { flex: none; cursor: zoom-in; }
.diploma img { width: 72px; height: 96px; object-fit: cover; border: 1px solid var(--line); }

/* Portfolio */
.portfolio-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 24px; }
.tabs { display: flex; flex-wrap: wrap; gap: 8px; }
.tab {
  cursor: pointer; display: flex; gap: 8px;
  border: 1px solid var(--ink); background: transparent; color: var(--ink);
  padding: 10px 16px;
  font-family: var(--display); font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase;
}
.tab span { opacity: 0.75; }
.tab[aria-pressed="true"] { background: var(--ink); color: var(--bg); }
.masonry { columns: 3 280px; column-gap: 14px; }
.work {
  display: block; width: 100%; margin: 0 0 14px;
  border: 1px solid var(--line); background: #fff;
  cursor: zoom-in; break-inside: avoid;
}
.work:hover { border-color: var(--ink); }
.work img { width: 100%; height: auto; }
.more { display: flex; justify-content: center; }
.more[hidden] { display: none; }

/* Drony */
.services { list-style: none; padding: 0; border-top: 1px solid var(--ink); }
.services li {
  display: grid; grid-template-columns: 48px 1fr; gap: 12px;
  padding: 18px 0; border-bottom: 1px solid #cfcfcb;
}
.services__n {
  font-family: var(--display); font-size: 14px; letter-spacing: 0.1em;
  color: var(--accent); padding-top: 4px;
}
.services li > div { display: flex; flex-direction: column; gap: 4px; }
.services h3 {
  font-family: var(--display); font-weight: 400; font-size: 20px; letter-spacing: 0.06em;
  text-transform: uppercase; padding-top: 3px;
}
.services p { font-size: 15px; line-height: 1.5; color: var(--muted); }
.drone-media { display: flex; flex-direction: column; gap: 14px; }
.drone-media figure { margin: 0; }
.drone-video video { display: block; width: 100%; height: auto; background: var(--dark); }
.drone-gallery {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
}
.drone-gallery a { display: block; aspect-ratio: 16 / 10; overflow: hidden; background: var(--dark); cursor: zoom-in; }
.drone-gallery img { width: 100%; height: 100%; object-fit: cover; }
.drone-compare a { display: block; cursor: zoom-in; }
.drone-compare img { width: 100%; height: auto; }
.drone-compare figcaption { margin-top: 8px; font-size: 14px; color: var(--muted); }
.models { display: flex; flex-direction: column; gap: 14px; margin-top: 34px; }
.models__grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
}
.model, .model-frame { position: relative; display: block; aspect-ratio: 16 / 9; overflow: hidden; background: var(--dark); }
.model img { width: 100%; height: 100%; object-fit: cover; transition: opacity .2s; }
.model:hover img { opacity: .8; }
.model__label {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 28px 14px 12px;
  display: flex; justify-content: space-between; align-items: baseline; gap: 12px;
  background: linear-gradient(transparent, rgba(17, 17, 16, .85));
  color: var(--on-dark); font-family: var(--display); font-size: 20px; letter-spacing: .04em;
}
.model__label span { padding: 5px 10px; font-size: 14px; color: var(--on-dark); background: var(--dark); white-space: nowrap; }
.model:hover .model__label span { background: var(--accent); color: #fff; }
.model-frame iframe { width: 100%; height: 100%; border: 0; display: block; }
.models__note { font-size: 14px; line-height: 1.5; color: var(--muted); max-width: 70ch; }
.certificates { display: flex; flex-direction: column; gap: 18px; }
.certificates__title {
  font-family: var(--display); font-weight: 400; font-size: 13px; letter-spacing: 0.3em;
  text-transform: uppercase;
}
.certificates__grid {
  display: grid; gap: 14px; max-width: 860px;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
}
.certificates__grid a { display: block; border: 1px solid #cfcfcb; background: #fff; cursor: zoom-in; }
.certificates__grid img { width: 100%; height: auto; }

/* Kontakt a patička */
.contact { scroll-margin-top: 70px; background: var(--dark); color: var(--on-dark); }
.contact__inner { padding-bottom: 40px; display: flex; flex-direction: column; gap: 48px; }
.contact__grid {
  display: grid; gap: clamp(32px, 5vw, 72px);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
}
.contact__links { display: flex; flex-direction: column; gap: 20px; align-items: flex-start; }
.contact a { color: var(--on-dark); font-family: var(--display); font-weight: 300; }
.contact a:hover { color: var(--accent-dark); }
.contact__mail { font-size: clamp(26px, 3.6vw, 46px); letter-spacing: 0.02em; word-break: break-word; }
.contact__phone { font-size: clamp(22px, 2.6vw, 32px); letter-spacing: 0.04em; }
.contact__info {
  display: grid; gap: 28px; font-size: 15px; line-height: 1.6; color: #cfcfca;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}
.contact__bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px;
  padding-top: 20px; border-top: 1px solid #3a3a38;
  font-size: 13px; color: #a8a8a3;
}
.contact__bottom a {
  color: #dcdcd8; font-family: inherit; font-weight: inherit;
  text-decoration: underline; text-underline-offset: 3px;
}

/* Lightbox */
.lightbox {
  position: fixed; inset: 0; width: 100%; height: 100%;
  max-width: none; max-height: none; margin: 0; border: 0;
  padding: 56px 16px; background: rgba(17, 17, 16, 0.94);
  overflow: hidden;
}
.lightbox[open] { display: flex; align-items: center; justify-content: center; }
.lightbox::backdrop { background: transparent; }
.lightbox > img {
  max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}
.lightbox__btn {
  position: absolute; width: 44px; height: 44px; cursor: pointer;
  border: 1px solid var(--on-dark); background: rgba(17, 17, 16, 0.6);
  color: var(--on-dark); font-size: 20px; line-height: 1;
}
.lightbox__btn:hover { border-color: var(--accent-dark); color: var(--accent-dark); }
.lightbox__btn[hidden] { display: none; }
.lightbox__caption {
  position: absolute; left: 68px; right: 68px; bottom: 16px; margin: 0;
  font-size: 13px; line-height: 1.4; text-align: center; color: #dcdcd8;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.lightbox__close { top: 12px; right: 12px; background: transparent; }
.lightbox__prev { left: 12px; top: 50%; }
.lightbox__next { right: 12px; top: 50%; }

/* Stránka 404 */
.notfound {
  min-height: 100vh; min-height: 100svh;
  display: flex; align-items: center;
  background: var(--dark); color: var(--on-dark);
}
.notfound__inner {
  width: 100%; max-width: var(--max); margin: 0 auto; padding: 56px var(--gutter);
  display: flex; flex-direction: column; gap: 28px; align-items: flex-start;
}
.notfound h1 {
  width: 100%;
  font-family: var(--display); font-weight: 200;
  font-size: clamp(48px, 11.5vw, 150px); line-height: 1.04; letter-spacing: 0.02em;
  text-transform: uppercase;
  border-top: 1px solid var(--on-dark); border-bottom: 1px solid var(--on-dark);
  padding: 0.26em 0 0.03em;
}
.notfound p { font-size: 18px; line-height: 1.55; color: #dcdcd8; }

/* Na úzkém displeji je navigace pod logem, hlavička je proto vyšší. */
@media (max-width: 600px) {
  .section, .contact { scroll-margin-top: 104px; }
}
@media (max-width: 420px) {
  .site-nav { gap: 4px 16px; font-size: 13px; letter-spacing: 0.1em; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}