/* ═══════════════════════════════════════════════════════════
   ADVERTI — hlavní stylesheet
   Fonty:   Ubuntu (headliny), Inter (body), Cormorant Garamond (akcent)
   Barvy:   --dark #221f20, --red #a93635, --white #fff, --light #f4f3f1
   ═══════════════════════════════════════════════════════════ */


/* ── 1. PROMĚNNÉ & RESET ──────────────────────────────────── */

:root {
  --dark:     #221f20;
  --red:      #a93635;
  --white:    #ffffff;
  --light:    #f4f3f1;
  --mid:      #dedad6;
  --muted:    #8c8885;

  --headline: 'Ubuntu', -apple-system, BlinkMacSystemFont, sans-serif;
  --sans:     'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --serif:    'Cormorant Garamond', Georgia, serif;

  --container:    1160px;
  --gutter:       40px;
  --nav-h:        64px;
  --section-pad:  110px;

  --ease: 200ms ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  font-family: var(--sans);
  background: var(--white);
  color: var(--dark);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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


/* ── 2. LAYOUT ────────────────────────────────────────────── */

.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}


/* ── 3. TYPOGRAFICKÉ UTILITY ──────────────────────────────── */

/* Serify — pouze jako akcent pro jedno slovo / slovní spojení */
.accent {
  font-family: var(--headline);
  font-style: normal;
  font-weight: 700;
  color: var(--red);
}

/* Sekční label — malý uppercase nad nadpisem */
.section-label {
  display: block;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 52px;
}

.section-label::before {
  content: '';
  display: block;
  width: 28px;
  height: 2px;
  background: var(--red);
  margin-bottom: 14px;
}


/* ── 4. NAVIGACE ──────────────────────────────────────────── */

.nav {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--white);
  border-bottom: 1px solid transparent;
  transition: border-color var(--ease);
}

.nav.is-scrolled {
  border-bottom-color: var(--mid);
}

.nav__inner {
  height: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo img {
  height: 30px;
  width: auto;
}

.nav__toggle {
  display: none;
}

.nav__menu {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav__menu a {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--dark);
  text-decoration: none;
  transition: color var(--ease);
}

.nav__menu a:hover {
  color: var(--red);
}


/* ── 5. HERO ──────────────────────────────────────────────── */

.hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-block: calc(var(--nav-h) + 60px) 80px;
  position: relative;
  overflow: hidden;
}

/* Dekorativní praporek v pozadí
   DESIGNER: upravit velikost (width), pozici (right/top) a průhlednost (opacity) */
.hero__mark {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: clamp(160px, 28vw, 380px);
  opacity: 0.08;
  pointer-events: none;
  user-select: none;
}

.hero__body {
  position: relative;
  z-index: 2;
  max-width: 860px;
}

.hero__lines {
  font-family: var(--headline);
  font-weight: 500;
  font-size: clamp(36px, 5.2vw, 70px);
  line-height: 1.12;
  color: var(--dark);
  margin-bottom: 36px;
}

.hero__lines p {
  margin-bottom: 0.04em;
}

.hero__closing {
  font-family: var(--sans);
  font-weight: 400;
  font-size: clamp(17px, 1.8vw, 24px);
  color: var(--dark);
  line-height: 1.55;
}


/* ── 6. OBECNÉ SEKCE ──────────────────────────────────────── */

.section {
  padding-block: var(--section-pad);
}

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

.section--light {
  background: var(--light);
}

/* Dekorativní praporek v tmavých sekcích */
.section__mark {
  position: absolute;
  right: 48px;
  top: 50%;
  transform: translateY(-50%);
  width: clamp(100px, 15vw, 220px);
  opacity: 0.06;
  pointer-events: none;
  user-select: none;
  filter: invert(1);
}

/* Varianta: praporek v dolním rohu (video sekce) */
.section__mark--bottom {
  top: auto;
  bottom: 40px;
  transform: none;
}

/* Wrapper pro sekce s relativní pozicí (kvůli mark) */
.section--dark {
  position: relative;
  overflow: hidden;
}

/* Sekční headline — Ubuntu Bold */
.section__headline {
  font-family: var(--headline);
  font-weight: 700;
  font-size: clamp(28px, 3.8vw, 52px);
  line-height: 1.08;
  color: var(--dark);
  margin-bottom: 36px;
}

.section__headline--light {
  color: var(--white);
}

/* Tělo sekce */
.section__body {
  position: relative;
  z-index: 2;
  max-width: 820px;
}

.section__body--narrow {
  max-width: 660px;
}

/* CO OPRAVDU UMÍME — velký lead text */
.section__lead {
  font-family: var(--sans);
  font-weight: 400;
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.72;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 24px;
}

.section__note {
  font-family: var(--sans);
  font-weight: 400;
  font-size: clamp(15px, 1.4vw, 19px);
  color: rgba(255, 255, 255, 0.72);
  letter-spacing: 0.04em;
}

/* JAK TO FUNGUJE — větší intro věta */
.section__intro {
  font-family: var(--sans);
  font-weight: 500;
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.45;
  color: var(--dark);
  margin-bottom: 28px;
}

/* Odstavce uvnitř úzkého body */
.section__body--narrow p {
  font-size: 17px;
  line-height: 1.78;
  color: var(--dark);
  margin-bottom: 1em;
}

/* Závěrečná věta sekce — důraz */
.section__closing {
  font-family: var(--sans);
  font-weight: 600;
  font-size: clamp(16px, 1.5vw, 20px);
  color: var(--dark);
  margin-top: 8px;
  margin-bottom: 0 !important;
}


/* ── 7. PROJEKTY ──────────────────────────────────────────── */

.projects {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  column-gap: 2px;
  row-gap: 80px;
}

.project {
  background: var(--white);
  border: 1px solid var(--mid);
  display: flex;
  flex-direction: column;
}

/* DESIGNER: nahradit .project__placeholder za <img> nebo <div> s fotografiemi */
.project__media {
  flex-shrink: 0;
}

.project__collage {
  display: grid;
  grid-template-rows: auto auto;
  gap: 3px;
  background: var(--mid);
}

.project__collage-top img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}

.project__collage-bottom {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 3px;
}

.project__collage-bottom img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
}

/* ČS — lehatka nahoru, montáž dolů */
.project__collage-bottom img:first-child {
  object-position: center 25%;
}

.project__collage-bottom img:last-child {
  object-position: center 65%;
}

/* Olivie — levý spodní sloupec větší, pravá fotka ořez nahoru (obličej + krabička) */
.project__collage--olivie .project__collage-bottom {
  grid-template-columns: 2.5fr 1fr;
}

.project__collage--olivie .project__collage-bottom img:first-child {
  object-position: center 60%;
}


.project__collage--olivie .project__collage-bottom img:last-child {
  object-position: center 12%;
}

/* Frama — flotila mírně dolů (kabiny), detail středem, dálnice středem */
.project__collage--frama .project__collage-top img {
  object-position: center 60%;
}

.project__collage--frama .project__collage-bottom img:first-child {
  object-position: center center;
}

.project__collage--frama .project__collage-bottom img:last-child {
  object-position: center center;
}

/* Demos — katalog s brýlemi nahoře, záložky vlevo dole, 2026 vpravo dole */
.project__collage--demos .project__collage-top img {
  object-position: center 40%;
}

.project__collage--demos .project__collage-bottom img:first-child {
  object-position: center 55%;
}

.project__collage--demos .project__collage-bottom img:last-child {
  object-position: center 30%;
}

.project__placeholder {
  aspect-ratio: 16 / 10;
  background: var(--light);
  border-bottom: 1px solid var(--mid);
  display: flex;
  align-items: center;
  justify-content: center;
}

.project__placeholder span {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.project__tag {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--red);
  display: block;
  padding: 10px 36px 0;
}

/* Headline projektu — Ubuntu Bold, novinový charakter */
.project__headline {
  font-family: var(--headline);
  font-weight: 700;
  font-size: clamp(18px, 1.8vw, 24px);
  line-height: 1.22;
  color: var(--dark);
  padding: 28px 36px 20px;
}

.project__text {
  margin-top: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: #3a3733;
  padding: 0 36px;
}

.placeholder-text {
  font-style: italic;
  color: var(--dark);
}

.btn-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 24px 36px 32px;
  padding-bottom: 4px;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dark);
  text-decoration: none;
  border-bottom: none;
  transition: color 0.2s ease, gap 0.2s ease;
}

.btn-more::after {
  content: '→';
  font-size: 14px;
  font-weight: 400;
  color: var(--red);
  transition: transform 0.2s ease;
}

.btn-more:hover {
  color: var(--red);
  gap: 14px;
}

.btn-more:hover::after {
  transform: translateX(4px);
}


/* ── 8. VIDEO BLOK ────────────────────────────────────────── */

.video-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.video-block__text p {
  font-size: 17px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 1em;
}

.btn-outline {
  display: inline-block;
  margin-top: 8px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--white);
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 11px 28px;
  transition: all var(--ease);
}

.btn-outline:hover {
  border-color: var(--white);
  background: var(--white);
  color: var(--dark);
}

.media-placeholder {
  aspect-ratio: 4 / 3;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.media-placeholder span {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.22);
}

/* Foto koláž — 2×3 grid s bílými linkami */
.video-collage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: repeat(3, 1fr);
  gap: 3px;
  background: var(--white);
}

/* Wrapper každé buňky — ořízne zoom při hoveru */
.video-collage__cell {
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.video-collage img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(100%);
  transition: filter 450ms ease, transform 450ms ease;
}

.video-collage img:hover {
  filter: grayscale(0%);
  transform: scale(1.05);
}


/* ── 9. CTA / KONTAKT ─────────────────────────────────────── */

.cta {
  max-width: 740px;
}

.cta__headline {
  font-family: var(--headline);
  font-weight: 700;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.1;
  color: var(--dark);
  margin-bottom: 16px;
}

.cta__sub {
  font-family: var(--sans);
  font-size: 18px;
  font-weight: 400;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 48px;
}

.cta__examples {
  border-top: 1px solid var(--mid);
  margin-bottom: 52px;
}

.cta__example {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--muted);
  padding-block: 18px;
  border-bottom: 1px solid var(--mid);
}

/* Formulář */
.form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form__field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form__field label {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--dark);
}

.form__field input,
.form__field textarea {
  width: 100%;
  font-family: var(--sans);
  font-size: 16px;
  color: var(--dark);
  background: var(--white);
  border: 1px solid var(--mid);
  padding: 12px 16px;
  outline: none;
  border-radius: 0;
  -webkit-appearance: none;
  transition: border-color var(--ease);
  resize: vertical;
}

.form__field input::placeholder,
.form__field textarea::placeholder {
  color: var(--muted);
}

.form__field input:focus,
.form__field textarea:focus {
  border-color: var(--dark);
}

.form__footer {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.btn-primary {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--white);
  background: var(--dark);
  border: none;
  padding: 14px 40px;
  cursor: pointer;
  transition: background var(--ease);
}

.btn-primary:hover {
  background: var(--red);
}

.btn-primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.form__status {
  font-size: 14px;
  line-height: 1.5;
}

.form__status.ok  { color: #2a7a3b; }
.form__status.err { color: var(--red); }


/* ── 10. FOOTER ───────────────────────────────────────────── */

.footer {
  background: var(--dark);
  padding-block: 56px;
}

.footer__inner {
  display: flex;
  align-items: flex-start;
  gap: 48px;
  flex-wrap: wrap;
}

/* DESIGNER: logo na tmavém pozadí — zvažte bílou verzi loga */
.footer__logo {
  height: 24px;
  width: auto;
  opacity: 0.7;
}

.footer__info {
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.45);
  flex: 1;
}

.footer__info a {
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  transition: color var(--ease);
}

.footer__info a:hover {
  color: var(--white);
}

.footer__copy {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.25);
  align-self: flex-end;
}


/* ── 11. RESPONZIVITA ─────────────────────────────────────── */

@media (max-width: 900px) {
  :root {
    --section-pad: 80px;
    --gutter: 28px;
  }

  .projects {
    grid-template-columns: 1fr;
  }

  .video-block {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .form__row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  :root {
    --section-pad: 64px;
    --gutter: 20px;
  }

  .nav__toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
  }

  .nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--dark);
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  .nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav.is-open .nav__toggle span:nth-child(2) { opacity: 0; }
  .nav.is-open .nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .nav__menu {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--mid);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 0;
  }

  .nav.is-open .nav__menu {
    display: flex;
  }

  .nav__menu a {
    width: 100%;
    padding: 14px var(--gutter);
    font-size: 15px;
  }

  .hero__mark {
    opacity: 0.05;
    width: 55vw;
    right: -10px;
  }

  .projects {
    grid-template-columns: 1fr;
    row-gap: 40px;
  }

  .project__headline {
    padding: 20px 24px 0;
    font-size: clamp(18px, 4vw, 22px);
  }

  .project__tag {
    padding: 8px 24px 0;
  }

  .project__text {
    padding: 0 24px;
  }

  .btn-more {
    margin: 20px 24px 24px;
  }

  .footer__inner {
    flex-direction: column;
    gap: 24px;
  }

  .footer__copy {
    align-self: auto;
  }
}