/* ============================================================
   NAV — Layout + base styles only.
   VISUAL animation (bg, opacity, transform, width) drží
   GSAP master timeline v scripts/nav-collapse.js.
   Class .is-collapsed zde řeší JEN layout (padding, gap, pointer-events).
   ============================================================ */

.nav {
  position: fixed;
  top: 26px;
  left: var(--page-padding);
  right: var(--page-padding);
  height: 56px;
  display: flex;
  align-items: center;
  z-index: 100;
  pointer-events: none;
}

/* ============================================================
   ZONE 1 — Full logo (left)
   ============================================================ */

.nav__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  pointer-events: auto;
  opacity: 1;
  /* BULLETPROOF: žádný transform NIKDY — kdyby GSAP cokoli inline nastavil */
  transform: none !important;
  will-change: opacity;
  transition: opacity 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

.nav.is-collapsed .nav__logo {
  opacity: 0;
  pointer-events: none;
  transform: none !important;
}

.nav__logo-full {
  width: 170px;
  height: 38px;
  display: block;
}

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

.nav__menu {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 28px;
  margin-right: 28px;
  pointer-events: auto;
  opacity: 1;
  will-change: opacity;
  transition: opacity 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

.nav.is-collapsed .nav__menu {
  opacity: 0;
  pointer-events: none;
}

.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-body);
  font-weight: 400;
  line-height: var(--leading-tight);
  color: var(--color-fg);
  white-space: nowrap;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.nav__link:hover {
  opacity: 0.6;
}

.nav__link--has-dropdown {
  cursor: pointer;
}

.nav__link--has-dropdown::after {
  content: '';
  width: 8px;
  height: 5px;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 5'><path d='M1 1l3 3 3-3' stroke='%231d1d1f' stroke-width='1' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat: no-repeat;
  background-size: contain;
  transition: transform 220ms var(--ease-out);
}

/* ============================================================
   SERVICES DROPDOWN — hidden by default, show on hover/focus
   ============================================================ */

.nav__dropdown-wrap {
  position: relative;
}

.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px 18px;
  background: #ffffff;
  border-radius: 14px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
  will-change: opacity, transform;
  transition:
    opacity 220ms var(--ease-out),
    transform 240ms cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 10;
}

/* "Bridge" zóna — neviditelný hover zone mezi Services a dropdownem,
   aby hover nepadal když přejedeš myší přes mezeru */
.nav__dropdown::before {
  content: '';
  position: absolute;
  top: -16px;
  left: 0;
  right: 0;
  height: 18px;
}

.nav__dropdown-wrap:hover .nav__dropdown,
.nav__dropdown-wrap:focus-within .nav__dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* Šipka rotuje když dropdown otevřený */
.nav__dropdown-wrap:hover .nav__link--has-dropdown::after,
.nav__dropdown-wrap:focus-within .nav__link--has-dropdown::after {
  transform: rotate(180deg);
}

.nav__dropdown-item {
  font-size: var(--text-body);
  font-weight: 400;
  color: var(--color-fg);
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
  transition: opacity 150ms ease-out;
}

.nav__dropdown-item:hover {
  opacity: 0.6;
}

/* ============================================================
   ZONE 2 — Pill
   bg + shadow ovládá GSAP. Padding/gap zde (instant layout change).
   ============================================================ */

.nav__pill {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 0;
  height: 56px;
  padding: 0;
  border-radius: var(--radius-pill);
  background-color: transparent;
  box-shadow: 0 0 0 rgba(0, 0, 0, 0);
  pointer-events: none;
  will-change: background-color, box-shadow;
  transition:
    background-color 160ms cubic-bezier(0.4, 0, 0.2, 1),
    box-shadow 160ms cubic-bezier(0.4, 0, 0.2, 1),
    padding 160ms cubic-bezier(0.4, 0, 0.2, 1),
    gap 160ms cubic-bezier(0.4, 0, 0.2, 1);
}

.nav.is-collapsed .nav__pill {
  gap: 8px;
  padding: 7px 14px 7px 7px;
  background-color: #ffffff;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.07), 0 1px 4px rgba(0, 0, 0, 0.04);
  pointer-events: auto;
}

/* ---- Mark circle (GSAP roztáhne z 0) ---- */

.nav__pill-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 0;
  height: 42px;
  overflow: hidden;
  background-color: #1d1d1f;
  border-radius: 50%;
  flex-shrink: 0;
  opacity: 0;
  pointer-events: none;
  will-change: width, opacity;
  transition:
    width 160ms cubic-bezier(0.4, 0, 0.2, 1),
    opacity 140ms cubic-bezier(0.4, 0, 0.2, 1);
}

.nav.is-collapsed .nav__pill-logo {
  width: 42px;
  opacity: 1;
  pointer-events: auto;
}

.nav__logo-mark {
  width: 22px;
  height: auto;
  flex-shrink: 0;
  display: block;
  opacity: 0;
  will-change: opacity;
  transition: opacity 200ms cubic-bezier(0.4, 0, 0.2, 1) 60ms;
}

.nav.is-collapsed .nav__logo-mark {
  opacity: 1;
}

/* ---- Contact button ---- */

.nav__contact {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 28px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  background-color: var(--color-fg);
  color: #ffffff;
  font-size: var(--text-body);
  font-weight: 400;
  line-height: 1;
  white-space: nowrap;
  flex-shrink: 0;
  pointer-events: auto;
  /* CSS transitions na base — funguje pro hover I pro state change */
  transition:
    background-color 280ms var(--ease-out),
    color 280ms var(--ease-out),
    border-color 280ms var(--ease-out);
}

/* Collapsed state — ghost outline */
.nav.is-collapsed .nav__contact {
  background-color: transparent;
  color: var(--color-fg);
  border-color: #e5e5ea;
}

/* Hover — accent v obou stavech */
.nav__contact:hover,
.nav.is-collapsed .nav__contact:hover {
  background-color: var(--color-accent);
  color: var(--color-fg);
  border-color: var(--color-accent);
}

/* ---- Hamburger ---- */

.nav__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 0;
  height: 42px;
  flex-shrink: 0;
  overflow: hidden;
  opacity: 0;
  border: none;
  background: none;
  cursor: pointer;
  padding: 0;
  pointer-events: none;
  will-change: width, opacity;
  transition:
    width 160ms cubic-bezier(0.4, 0, 0.2, 1),
    opacity 140ms cubic-bezier(0.4, 0, 0.2, 1);
}

.nav.is-collapsed .nav__toggle {
  width: 32px;
  opacity: 1;
  pointer-events: auto;
}

.nav__toggle-bars {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 32px;
}

.nav__toggle-bars span {
  display: block;
  height: 2px;
  background-color: var(--color-fg);
  border-radius: 0;
  transition:
    transform 200ms ease-out,
    width 200ms ease-out,
    opacity 200ms ease-out;
}

/* Obě čáry stejné délky pro symetrický X */
.nav__toggle-bars span:nth-child(1) { width: 22px; }
.nav__toggle-bars span:nth-child(2) { width: 22px; }

/* 2-bar → X (perfektně symetrický protože obě 22px) */
.nav.is-menu-open .nav__toggle-bars span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}
.nav.is-menu-open .nav__toggle-bars span:nth-child(2) {
  transform: translateY(-5px) rotate(-45deg);
}

/* ============================================================
   OVERLAY MENU — premium full-screen
   ============================================================ */

.nav__overlay {
  position: fixed;
  inset: 0;
  overflow: clip;        /* velky menu text nikdy nezpusobi bocni scroll */
  background-color: rgba(10, 10, 10, 0);
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  padding: 130px var(--page-padding) 80px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  text-align: right;
  gap: 14px;
  opacity: 0;
  pointer-events: none;
  transition:
    background-color 500ms cubic-bezier(0.22, 1, 0.36, 1),
    backdrop-filter 500ms cubic-bezier(0.22, 1, 0.36, 1),
    -webkit-backdrop-filter 500ms cubic-bezier(0.22, 1, 0.36, 1),
    opacity 400ms cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 99;
}

.nav.is-menu-open ~ .nav__overlay {
  opacity: 1;
  pointer-events: auto;
  background-color: rgba(10, 10, 10, 0.98);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
}

/* ── Menu položky — velký display text + číslo + hover slide ── */
.nav__overlay a {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 28px;
  font-family: var(--font-display);
  font-size: clamp(40px, 8vw, 100px);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: var(--tracking-display);
  color: #ffffff;
  text-decoration: none;
  cursor: pointer;
  will-change: transform, color;
  transition:
    color 280ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 420ms cubic-bezier(0.22, 1, 0.36, 1);
}

/* Auto-numbered prefix (JS přidá data-num) */
.nav__overlay a::before {
  content: attr(data-num);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0;
  color: rgba(255, 255, 255, 0.35);
  align-self: flex-start;
  padding-top: 22px;
  transition: color 280ms cubic-bezier(0.22, 1, 0.36, 1);
}

/* Hover — slide left + accent color (čísla taky) */
.nav__overlay a:hover {
  color: var(--color-accent);
  transform: translateX(-20px);
}

.nav__overlay a:hover::before {
  color: var(--color-accent);
}

/* ============================================================
   MOBILE
   DEFAULT: full COSMOFRAME logo vlevo + Contact + hamburger vpravo
   SCROLL: full logo zmizí, mini dot vyjede v pillu
   ============================================================ */

@media (max-width: 767px) {
  .nav {
    top: 14px;
    height: 42px;
  }

  /* DEFAULT: full logo viditelný vlevo */
  .nav__logo {
    display: flex !important;             /* override jakéhokoli desktop hide */
    opacity: 1;
    pointer-events: auto;
    transform: none !important;           /* zabíjí GSAP zbytky / jakékoli translate */
    transition: opacity 180ms cubic-bezier(0.4, 0, 0.2, 1);
  }

  .nav__logo-full {
    width: 116px;
    height: 26px;
  }

  /* SCROLL: full logo jen fadne pryč (žádné sliding) */
  .nav.is-collapsed .nav__logo {
    opacity: 0;
    pointer-events: none;
  }

  .nav__menu {
    display: none;
  }

  /* Pill = Contact + hamburger, sticky vpravo. Menší + cleaner. */
  .nav__pill {
    gap: 4px;
    padding: 3px 3px 3px 4px;
    background-color: #ffffff;
    box-shadow: 0 2px 14px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.04);
    pointer-events: auto;
    margin-left: auto;
    height: 40px;
    border-radius: var(--radius-pill);
  }

  /* DEFAULT: dot v pillu SKRYTÝ */
  .nav__pill-logo {
    width: 0 !important;
    opacity: 0 !important;
    pointer-events: none !important;
    margin: 0 !important;
    overflow: hidden;
    transition: width 200ms cubic-bezier(0.4, 0, 0.2, 1),
                opacity 180ms cubic-bezier(0.4, 0, 0.2, 1),
                margin 200ms cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* SCROLL: dot v pillu — STEJNE VELKY jako Contact button (34px) */
  .nav.is-collapsed .nav__pill-logo {
    width: 34px !important;
    height: 34px !important;
    opacity: 1 !important;
    pointer-events: auto !important;
    margin-right: 3px !important;
    border-radius: 50%;
  }

  .nav__logo-mark {
    width: 18px;
    height: auto;          /* zachova pomer stran 40:38 — zadna deformace */
  }

  /* Contact button — kompaktní */
  .nav__contact {
    height: 34px;
    padding: 0 13px;
    font-size: 12.5px;
    background-color: transparent;
    color: var(--color-fg);
    border-color: #e5e5ea;
    border-radius: var(--radius-pill);
  }

  /* Hamburger — kompaktní kruh */
  .nav__toggle {
    width: 34px;
    height: 34px;
    opacity: 1;
    pointer-events: auto;
    border-radius: 50%;
  }

  .nav__toggle-bar {
    width: 14px;
  }
}

/* ---- Phone (480) — ještě těsnější ---- */
@media (max-width: 479px) {
  .nav {
    top: 12px;
    height: 40px;
  }
  .nav__logo-full {
    width: 104px;
    height: 24px;
  }
  .nav__pill {
    height: 38px;
    padding: 3px 3px 3px 4px;
  }
  .nav__contact {
    height: 32px;
    padding: 0 11px;
    font-size: 12px;
  }
  .nav__toggle {
    width: 32px;
    height: 32px;
  }
  .nav.is-collapsed .nav__pill-logo {
    width: 32px !important;
    height: 32px !important;
  }
}