/* ══════════════════════════════════════════════════
   Header — Navigation, Hamburger, Mobile Menu
   ══════════════════════════════════════════════════ */

.kw-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding-block: clamp(1rem, 4vh, var(--sp-12));
  --header-opacity: 0.92;
  --header-blur: 20px;
  background: rgba(21, 28, 42, var(--header-opacity));
  backdrop-filter: blur(var(--header-blur));
  -webkit-backdrop-filter: blur(var(--header-blur));
  z-index: 200;
  border-bottom: 1px solid rgba(var(--c-accent-rgb), 0.1);
  transition: all 0.5s var(--ease-out);
}

.kw-header.scrolled {
  padding: var(--sp-3) 0;
  background: rgba(19, 25, 38, var(--header-opacity));
}

/* OFF states — properties removed from DOM entirely */
.kw-header--no-bg {
  background: none !important;
  border-bottom-color: transparent !important;
}
.kw-header--no-blur {
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}

.kw-header__inner {
  display: flex;
  transition: all 0.5s var(--ease-out);
}

/* ── Desktop layout ── */
@media (min-width: 769px) {
  .kw-header__inner {
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    block-size: clamp(100px, 18vh, 160px);
    max-width: 960px;
    margin: 0 auto;
    width: 100%;
    padding: 0 var(--sp-6);
    transition: height 0.5s var(--ease-out);
  }
  .kw-header.scrolled .kw-header__inner {
    flex-direction: row;
    height: 38px;
  }
  .kw-header__logo {
    transition: all 0.5s var(--ease-out);
  }
  .kw-nav {
    display: flex !important;
    transition: all 0.5s var(--ease-out);
  }
  .kw-header.scrolled .kw-nav {
    gap: clamp(10px, 1.8vw, var(--sp-6));
  }
}

/* ── Logo ── */
.kw-header__logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  text-decoration: none;
}

  .kw-header__logo img {
  height: clamp(76px, 14vh, 120px);
  max-width: 500px;
  object-fit: contain;
  transition: all 0.5s var(--ease-out);
}

.kw-header.scrolled .kw-header__logo img {
  height: 38px;
  width: auto;
}

@media (hover: hover) {
  .kw-header__logo:hover img {
    filter: brightness(1.15);
  }
}

/* ── Desktop nav ── */
.kw-nav {
  display: flex;
  gap: clamp(var(--sp-4), 3vw, var(--sp-8));
  align-items: center;
  transition: gap 0.5s var(--ease-out);
}

.kw-header.scrolled .kw-nav {
  gap: var(--sp-6);
}

.kw-nav__link {
  font-size: clamp(0.82rem, min(1.1vw, 2vh), 1.15rem);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--c-muted);
  transition: all 0.5s var(--ease-out);
  position: relative;
  font-family: var(--f-h);
  font-weight: 400;
}

.kw-header.scrolled .kw-nav__link {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
}

@media (hover: hover) {
  .kw-nav__link:hover { color: var(--c-accent); }
  .kw-nav__link:hover::after { width: 100%; }
}

.kw-nav__link::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--c-accent);
  transition: width 0.3s;
}

.kw-nav__link--config {
  color: var(--c-accent) !important;
  font-weight: 500;
}

.kw-nav__link--active {
  color: var(--c-accent) !important;
}
.kw-nav__link--active::after {
  width: 100% !important;
}

/* ── CTA Button ── */
.kw-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6);
  background: transparent;
  color: var(--c-accent);
  border: 1px solid var(--c-border-h);
  font-family: var(--f-h);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.5s ease;
  position: relative;
  overflow: hidden;
}

.kw-header.scrolled .kw-btn {
  font-size: 0.75rem;
  padding: var(--sp-2) var(--sp-4);
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.kw-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(var(--c-accent-rgb), 0.08), rgba(var(--c-accent-rgb), 0.03));
  opacity: 0;
  transition: opacity 0.3s;
}

.kw-btn--primary {
  background: linear-gradient(135deg, rgba(var(--c-accent-rgb), 0.18), rgba(var(--c-accent-rgb), 0.06));
  border-color: var(--c-accent);
}

@media (hover: hover) {
  .kw-btn:hover {
    border-color: var(--c-accent);
    box-shadow: 0 0 25px var(--c-glow2);
  }
  .kw-btn:hover::before { opacity: 1; }
  .kw-btn--primary:hover {
    background: linear-gradient(135deg, rgba(var(--c-accent-rgb), 0.28), rgba(var(--c-accent-rgb), 0.12));
    box-shadow: 0 0 40px var(--c-glow), 0 0 80px var(--c-glow2);
  }
}

/* ── Hamburger ── */
.kw-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--sp-2);
  z-index: 300;
  background: none;
  border: none;
  transition: all 0.5s var(--ease-out);
}

.kw-hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--c-white);
  transition: all 0.3s;
  transform-origin: center;
}

.kw-hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(4px, 5px); }
.kw-hamburger.active span:nth-child(2) { opacity: 0; }
.kw-hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(4px, -5px); }

/* ── Mobile nav overlay ── */
.kw-mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(21, 28, 42, 0.97);
  backdrop-filter: blur(20px);
  z-index: 199;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-8);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s;
}

.kw-mobile-nav.open {
  opacity: 1;
  pointer-events: auto;
}

.kw-mobile-nav a {
  font-family: var(--f-h);
  font-size: 1.8rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--c-white);
  transition: color 0.3s;
}

@media (hover: hover) {
  .kw-mobile-nav a:hover { color: var(--c-accent); }
}

/* ── Mobile responsive ── */
@media (max-width: 860px) {
  .kw-nav { display: none; }
  .kw-hamburger { display: flex; }
  .kw-mobile-nav { display: flex; }

  .kw-header {
    padding: var(--sp-8) 0;
    background: #151c2a !important;
    backdrop-filter: none !important;
  }

  .kw-header__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 0;
  }

  .kw-header__logo {
    flex: 1;
    min-width: 0;
  }

  .kw-header__logo img {
    height: 60px !important;
    width: 240px !important;
    object-fit: contain;
    object-position: left;
    transition: all 0.5s var(--ease-out) !important;
  }

  .kw-hamburger {
    flex-shrink: 0;
    margin-left: var(--sp-4);
  }

  /* Scrolled state on mobile */
  .kw-header.scrolled {
    padding: var(--sp-2) 0;
    background: #131926 !important;
    backdrop-filter: none !important;
  }

  .kw-header.scrolled .kw-header__logo img {
    height: 32px !important;
    width: 128px !important;
  }

  /* iOS Safari safe area hacks */
  @supports (-webkit-text-size-adjust: none) and (font: -apple-system-body) {
    .kw-header {
      padding-top: var(--sp-2) !important;
      padding-bottom: 28px !important;
    }
    .kw-header.scrolled {
      padding-top: 4px !important;
      padding-bottom: 12px !important;
    }
    .kw-hamburger {
      margin-top: 8px !important;
    }
    .kw-header.scrolled .kw-hamburger {
      margin-top: 2px !important;
    }
  }
}

@media (min-width: 769px) and (max-height: 760px) {
  .kw-header {
    padding-block: 1rem;
  }

  .kw-header__inner {
    block-size: 104px;
  }

  .kw-header__logo img {
    height: 76px;
  }

  .kw-nav {
    gap: clamp(var(--sp-3), 2vw, var(--sp-6));
  }

  .kw-nav__link {
    font-size: 0.78rem;
    letter-spacing: 0.1em;
  }
}

/* ── Chat widget sidebar ── */
@media (min-width: 768px) {
  body.aw-chat-open .kozich-premium-web { width: calc(100% - 400px); }
  body.aw-chat-open .kw-header { width: calc(100% - 400px); }
}