/*
 * hero.css — Navigace a hero sekce
 * Paleta: #1a1a1a (primary) · #e0292e (accent) · #888888 (neutral)
 */

/* ============================================================
   NAVIGACE
   ============================================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  /* Výchozí stav: průhledná nad hero */
  background-color: transparent;
  transition:
    background-color var(--transition-base),
    box-shadow var(--transition-base);
}

/* Stav po scrollu — přidán přes JS */
.site-header.scrolled {
  background-color: var(--color-primary);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

/* ===== NAV container ===== */

.nav {
  width: 100%;
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--section-px);
  height: 4.5rem;
}

/* ===== LOGO ===== */

.nav__logo {
  display: flex;
  align-items: baseline;
  gap: 0;
  font-family: var(--font-heading);
  font-weight: var(--font-weight-black);
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  text-decoration: none;
  line-height: 1;
  transition: opacity var(--transition-fast);
}

.nav__logo:hover {
  opacity: 0.85;
  color: inherit;
}

.nav__logo-word {
  color: var(--color-white);
}

.nav__logo-dot {
  color: var(--color-accent);
  font-size: 1.5em;
  line-height: 0;
  vertical-align: -0.05em;
  margin-inline: 0.02em;
}

.nav__logo-tld {
  color: var(--color-neutral-light);
}

/* ===== HAMBURGER (mobil) ===== */

.nav__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0.25rem;
  background: none;
  border: none;
  cursor: pointer;
  z-index: var(--z-modal);
  transition: opacity var(--transition-fast);
}

.nav__hamburger:hover {
  opacity: 0.7;
}

.nav__hamburger-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-white);
  border-radius: var(--radius-full);
  transform-origin: center;
  transition:
    transform var(--transition-base),
    opacity var(--transition-fast),
    width var(--transition-base);
}

/* Hamburger → křížek při otevřeném menu */
.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(2) {
  opacity: 0;
  width: 0;
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== MENU ===== */

/* Mobil: dropdown z hora dolů */
.nav__menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  list-style: none;
  /* Skryté — JS přidá .is-open */
  opacity: 0;
  pointer-events: none;
  transform: translateY(-1rem);
  transition:
    opacity var(--transition-base),
    transform var(--transition-base);
  z-index: var(--z-overlay);
}

.nav__menu.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.nav__link {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-bold);
  font-size: var(--text-2xl);
  color: var(--color-white);
  text-decoration: none;
  letter-spacing: var(--letter-spacing-tight);
  text-transform: uppercase;
  position: relative;
  padding-block: var(--space-2);
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-base);
}

.nav__link:hover {
  color: var(--color-accent);
}

.nav__link:hover::after {
  width: 100%;
}

/* Aktivní link */
.nav__link.is-active {
  color: var(--color-accent);
}

.nav__link.is-active::after {
  width: 100%;
}

/* CTA link — červené tlačítko v menu na mobilu */
.nav__link--cta {
  display: inline-flex;
  align-items: center;
  padding: var(--space-3) var(--space-8);
  background-color: var(--color-accent);
  color: var(--color-white) !important;
  border-radius: var(--radius-sm);
  font-size: var(--text-base) !important;
  transition:
    background-color var(--transition-fast),
    transform var(--transition-fast);
}

.nav__link--cta::after {
  display: none;
}

.nav__link--cta:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-white) !important;
  transform: scale(1.03);
}

/* ===== DESKTOP navigace ≥ 1024px ===== */

@media (min-width: 1024px) {
  .nav__hamburger {
    display: none;
  }

  .nav__menu {
    position: static;
    background-color: transparent;
    flex-direction: row;
    gap: var(--space-8);
    opacity: 1;
    pointer-events: auto;
    transform: none;
    bottom: auto;
  }

  .nav__link {
    font-size: var(--text-sm);
    font-weight: var(--font-weight-semibold);
  }

  .nav__link--cta {
    padding: var(--space-2) var(--space-5);
    font-size: var(--text-sm) !important;
  }
}

/* ============================================================
   HERO SEKCE
   ============================================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  /* Prostor pro fixed nav */
  padding-top: 4.5rem;
}

/* ===== Pozadí ===== */

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  /* Placeholder pozadí — geometrický gradient evokující profesionalitu */
  background:
    /* Červený akcent vpravo dole — echo tečky z loga */
    radial-gradient(
      ellipse 40% 60% at 85% 70%,
      rgba(224, 41, 46, 0.12) 0%,
      transparent 60%
    ),
    /* Hlavní gradient — černá, ale ne úplně flat */
    linear-gradient(
      135deg,
      #0d0d0d 0%,
      #1a1a1a 40%,
      #232323 70%,
      #1a1a1a 100%
    );
}

/* Jemná mřížka — texturu bez obrázku */
.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 4rem 4rem;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

/* Dekorativní červená čára — ozvěna linky z loga */
.hero__bg::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-accent) 30%,
    var(--color-accent) 70%,
    transparent 100%
  );
  opacity: 0.6;
}

.hero__bg-overlay {
  /* Ponecháno prázdné — overlay je v .hero__bg gradientu */
}

/* ===== Obsah ===== */

.hero__container {
  position: relative;
  z-index: var(--z-raised);
  padding-block: var(--space-20);
}

.hero__content {
  max-width: 42rem;
}

/* Eyebrow */
.hero__eyebrow {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-caps);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* H1 */
.hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-5xl);
  font-weight: var(--font-weight-black);
  color: var(--color-white);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  margin-bottom: var(--space-6);
}

/* Červený accent v nadpisu */
.hero__title-accent {
  color: var(--color-white);
  position: relative;
}

/* Červená tečka jako v logu */
.hero__title-dot {
  color: var(--color-accent);
}

/* Podnadpis */
.hero__subtitle {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.72);
  line-height: var(--line-height-loose);
  margin-bottom: var(--space-10);
  max-width: 38ch;
}

/* CTA tlačítka */
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-16);
}

.hero__cta-primary {
  /* btn-accent — červené */
}

.hero__cta-secondary {
  /* btn-ghost — průhledné, bílý border */
}

/* ===== Statistiky ===== */

.hero__stats {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.hero__stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.hero__stat-number {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--font-weight-black);
  color: var(--color-white);
  line-height: 1;
  letter-spacing: var(--letter-spacing-tight);
}

.hero__stat-label {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-caps);
}

.hero__stat-divider {
  width: 1px;
  height: 2.5rem;
  background-color: rgba(255, 255, 255, 0.15);
  flex-shrink: 0;
}

/* ===== Scroll hint ===== */

@keyframes bounce-down {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(6px); }
}

.hero__scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.4);
  text-decoration: none;
  transition: color var(--transition-fast);
  z-index: var(--z-raised);
}

.hero__scroll-hint:hover {
  color: var(--color-accent);
}

.hero__scroll-hint-text {
  font-size: var(--text-xs);
  letter-spacing: var(--letter-spacing-caps);
  text-transform: uppercase;
}

.hero__scroll-hint-arrow {
  animation: bounce-down 2s ease-in-out infinite;
}

/* ===== Responzivita ===== */

@media (max-width: 479px) {
  .hero__title {
    font-size: clamp(2.25rem, 10vw, 3rem);
  }

  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero__actions .btn {
    width: 100%;
    justify-content: center;
  }

  .hero__stats {
    gap: var(--space-4);
  }
}

@media (min-width: 768px) {
  .hero__content {
    max-width: 52rem;
  }
}

@media (min-width: 1024px) {
  .hero__title {
    font-size: clamp(3.5rem, 6vw, 5rem);
  }
}