/* Shared portfolio header for all case-study detail pages.
   Its visual system mirrors the canonical portfolio homepage header. */
:root {
  --portfolio-header-height: 82px;
  --portfolio-header-scrolled-height: 58px;
  --portfolio-header-edge: clamp(18px, 5vw, 96px);
  --portfolio-header-navy: #0a1330;
  --portfolio-header-ink: #edf1fb;
  --portfolio-header-muted: #aebad9;
  --portfolio-header-line: rgba(147, 164, 204, 0.2);
  --portfolio-header-glass-top: rgba(7, 13, 31, 0.68);
  --portfolio-header-glass-bottom: rgba(7, 13, 31, 0.56);
  --portfolio-header-idle-top: rgba(7, 13, 31, 0.48);
  --portfolio-header-idle-bottom: rgba(7, 13, 31, 0.34);
  --portfolio-header-brass: #c6a052;
  --portfolio-header-brass-soft: rgba(198, 160, 82, 0.7);
  --portfolio-header-ease: cubic-bezier(.16, 1, .3, 1);
}

.portfolio-header,
.portfolio-header * {
  box-sizing: border-box;
}

.portfolio-header {
  position: fixed;
  z-index: 200;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  min-height: var(--portfolio-header-height);
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 24px var(--portfolio-header-edge);
  background: linear-gradient(
    180deg,
    var(--portfolio-header-idle-top) 0%,
    var(--portfolio-header-idle-bottom) 100%
  );
  color: var(--portfolio-header-ink);
  font-family: "Plus Jakarta Sans", system-ui, sans-serif;
  -webkit-backdrop-filter: blur(8px) saturate(112%) brightness(0.94);
  backdrop-filter: blur(8px) saturate(112%) brightness(0.94);
  transition:
    min-height 0.35s var(--portfolio-header-ease),
    padding 0.35s var(--portfolio-header-ease),
    background 0.35s var(--portfolio-header-ease),
    -webkit-backdrop-filter 0.35s var(--portfolio-header-ease),
    backdrop-filter 0.35s var(--portfolio-header-ease);
}

body.theme-hilton .portfolio-header,
body.theme-fourpoints .portfolio-header,
body.theme-premiere .portfolio-header,
body.theme-sanga .portfolio-header {
  --portfolio-header-idle-top: rgba(7, 13, 31, 0.64);
  --portfolio-header-idle-bottom: rgba(7, 13, 31, 0.52);
}

body.theme-hoiana .portfolio-header,
body.theme-langchai .portfolio-header,
body.theme-moulin .portfolio-header,
body.theme-xine .portfolio-header {
  --portfolio-header-idle-top: rgba(7, 13, 31, 0.32);
  --portfolio-header-idle-bottom: rgba(7, 13, 31, 0.2);
}

.portfolio-header::after {
  position: absolute;
  right: var(--portfolio-header-edge);
  bottom: 0;
  left: var(--portfolio-header-edge);
  height: 1px;
  background: rgba(255, 255, 255, 0.15);
  content: "";
  transition: right 0.35s var(--portfolio-header-ease), left 0.35s var(--portfolio-header-ease), background 0.35s var(--portfolio-header-ease);
}

.portfolio-header.is-scrolled {
  min-height: 58px;
  padding-top: 13px;
  padding-bottom: 13px;
  background: linear-gradient(
    180deg,
    var(--portfolio-header-glass-top) 0%,
    var(--portfolio-header-glass-bottom) 100%
  );
  -webkit-backdrop-filter: blur(16px) saturate(130%) brightness(0.86);
  backdrop-filter: blur(16px) saturate(130%) brightness(0.86);
}

.portfolio-header.is-scrolled::after {
  right: 0;
  left: 0;
  background: var(--portfolio-header-line);
}

@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .portfolio-header.is-scrolled {
    background: rgba(7, 13, 31, 0.84);
  }
}

.portfolio-header__brand {
  position: relative;
  z-index: 1;
  display: inline-flex;
  flex: none;
  align-items: center;
}

.portfolio-header__brand img {
  display: block;
  width: auto;
  max-width: 36vw;
  height: 34px;
  object-fit: contain;
  filter: drop-shadow(0 2px 8px rgba(5, 10, 28, 0.46));
  transition: height 0.35s var(--portfolio-header-ease);
}

.portfolio-header.is-scrolled .portfolio-header__brand img {
  height: 24px;
}

.portfolio-header__actions {
  position: relative;
  z-index: 1;
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 20px;
  margin-left: auto;
}

.portfolio-header .case-nav-phone {
  position: relative;
  padding-right: 28px;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  text-shadow: 0 1px 8px rgba(5, 10, 28, 0.56);
  white-space: nowrap;
}

.portfolio-header .case-nav-phone::after {
  position: absolute;
  top: 50%;
  right: 0;
  width: 1px;
  height: 20px;
  background: rgba(255, 255, 255, 0.2);
  content: "";
  transform: translateY(-50%);
}

.portfolio-header .case-language {
  display: inline-flex;
  height: 38px;
  align-items: center;
  gap: 7px;
  color: #9da9c7;
  filter: drop-shadow(0 1px 6px rgba(5, 10, 28, 0.5));
  white-space: nowrap;
}

.portfolio-header .case-language svg {
  flex: none;
  opacity: 0.8;
}

.portfolio-header .case-language > span {
  color: rgba(174, 186, 217, 0.35);
  font-size: 11px;
}

.portfolio-header .case-language-btn {
  position: relative;
  padding: 7px 2px;
  border: 0;
  background: transparent;
  color: #9da9c7;
  font: inherit;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1;
  text-decoration: none;
  transition: color 0.25s ease;
}

.portfolio-header .case-language-btn::after {
  position: absolute;
  right: 2px;
  bottom: 3px;
  left: 2px;
  height: 1px;
  background: var(--portfolio-header-brass);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--portfolio-header-ease);
}

.portfolio-header .case-language-btn:hover,
.portfolio-header .case-language-btn.is-active {
  color: #fff;
}

.portfolio-header .case-language-btn.is-active::after {
  transform: scaleX(1);
}

.portfolio-header .case-nav-btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border: 1px solid var(--portfolio-header-brass-soft);
  border-radius: 2px;
  color: var(--portfolio-header-ink);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  text-shadow: 0 1px 6px rgba(5, 10, 28, 0.38);
  white-space: nowrap;
  transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.portfolio-header .case-nav-btn:hover,
.portfolio-header .case-nav-btn:focus-visible {
  border-color: var(--portfolio-header-brass);
  background: var(--portfolio-header-brass);
  color: #171008;
}

.portfolio-header a:focus-visible {
  outline: 2px solid var(--portfolio-header-brass);
  outline-offset: 4px;
}

@media (max-width: 680px) {
  :root {
    --portfolio-header-height: 68px;
    --portfolio-header-scrolled-height: 54px;
  }

  .portfolio-header {
    gap: 14px;
    min-height: var(--portfolio-header-height);
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .portfolio-header::after {
    right: var(--portfolio-header-edge);
    left: var(--portfolio-header-edge);
  }

  .portfolio-header.is-scrolled {
    min-height: 54px;
    padding-top: 11px;
    padding-bottom: 11px;
  }

  .portfolio-header__actions {
    gap: 12px;
  }

  .portfolio-header .case-nav-phone {
    display: none;
  }

  .portfolio-header .case-language {
    gap: 5px;
  }

  .portfolio-header .case-language svg {
    width: 15px;
    height: 15px;
  }

  .portfolio-header .case-language-btn {
    font-size: 10px;
  }

  .portfolio-header__brand img {
    height: 26px;
  }

  .portfolio-header.is-scrolled .portfolio-header__brand img {
    height: 22px;
  }

  .portfolio-header .case-nav-btn {
    min-height: 40px;
    padding-inline: 13px;
    font-size: 11px;
  }
}

@media (max-width: 430px) {
  .portfolio-header__actions {
    gap: 9px;
  }

  .portfolio-header .case-language {
    display: flex;
    gap: 4px;
  }

  .portfolio-header .case-language svg {
    display: none;
  }

  .portfolio-header .case-language-btn {
    min-width: 24px;
    padding-block: 4px;
    font-size: 9px;
  }

  .portfolio-header .case-nav-btn {
    padding-inline: 10px;
    font-size: 10px;
  }
}

@media print {
  .portfolio-header {
    display: none !important;
  }
}