/* ===== Header & Navigation Component ===== */
header {
  min-height: 68px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px var(--page-gutter);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-dim);
  background: rgba(10, 15, 26, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background 0.2s var(--ease);
}

html[data-mode="light"] header {
  background: linear-gradient(180deg, #ffffff 0%, #f3efff 100%);
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.12), 0 1px 3px rgba(15, 23, 42, 0.05);
}

.logo,
.logo a,
.header-right,
.site-nav {
  display: flex;
  align-items: center;
}

.logo {
  min-width: 0;
}

.logo a {
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo-img {
  display: block;
  height: 44px;
  width: auto;
  max-width: min(230px, 42vw);
  object-fit: contain;
  transition: transform 0.16s var(--ease);
}

.logo a:hover .logo-img {
  transform: scale(1.02);
}

.logo-wordmark {
  font-weight: 800;
  font-size: 15px;
  line-height: 1.1;
  white-space: nowrap;
}

.header-right {
  min-width: 0;
  justify-content: flex-end;
  gap: 8px;
}

.site-nav {
  gap: 2px;
  padding: 4px;
  border: 1px solid var(--border-dim);
  border-radius: 13px;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

html[data-mode="light"] .site-nav {
  background: rgba(255, 255, 255, 0.85);
  border-color: rgba(167, 139, 250, 0.28);
  box-shadow: 0 2px 8px rgba(124, 58, 237, 0.04);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 10px;
  border-radius: 9px;
  text-decoration: none;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  transition: all 0.16s var(--ease);
}

.nav-link:hover {
  color: var(--text);
  background: rgba(167, 139, 250, 0.08);
}

.nav-link.active {
  color: var(--text);
  background: rgba(167, 139, 250, 0.14);
}

html[data-mode="light"] .nav-link {
  color: #555e75;
  font-weight: 700;
}

html[data-mode="light"] .nav-link:hover {
  color: #1a0b36;
  background: rgba(147, 51, 234, 0.08);
}

html[data-mode="light"] .nav-link.active {
  color: #1a0b36;
  background: #e9e1fc;
  font-weight: 900;
  border: 1px solid rgba(147, 51, 234, 0.22);
  box-shadow: 0 2px 6px rgba(124, 58, 237, 0.12);
}

.nav-burger {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4.5px;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-dim);
  border-radius: 11px;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  cursor: pointer;
  padding: 0;
  order: 99;
  transition: all 0.2s var(--ease);
  position: relative;
}

html[data-mode="light"] .nav-burger {
  background: rgba(255, 255, 255, 0.7);
}

.nav-burger:hover {
  border-color: var(--accent);
  background: rgba(167, 139, 250, 0.14);
}

.nav-burger-line {
  display: block;
  width: 17px;
  height: 2px;
  background-color: var(--muted);
  border-radius: 2px;
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              background-color 0.2s var(--ease);
  transform-origin: center;
}

.nav-burger:hover .nav-burger-line {
  background-color: var(--accent2);
}

/* Transisi Morphing menjadi tombol X saat drawer terbuka */
.nav-burger[aria-expanded="true"] .nav-burger-line:nth-child(1),
.nav-burger.open .nav-burger-line:nth-child(1),
body.nav-open .nav-burger .nav-burger-line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
  background-color: var(--accent2);
}

.nav-burger[aria-expanded="true"] .nav-burger-line:nth-child(2),
.nav-burger.open .nav-burger-line:nth-child(2),
body.nav-open .nav-burger .nav-burger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-burger[aria-expanded="true"] .nav-burger-line:nth-child(3),
.nav-burger.open .nav-burger-line:nth-child(3),
body.nav-open .nav-burger .nav-burger-line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
  background-color: var(--accent2);
}

/* Nav Search Button */
.nav-search-btn {
  height: 38px;
  width: 38px;
  min-height: 38px;
  min-width: 38px;
  padding: 0;
  border: 1px solid var(--border-dim);
  border-radius: 11px;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.16s var(--ease);
}

html[data-mode="light"] .nav-search-btn {
  background: rgba(255, 255, 255, 0.7);
}

.nav-search-btn:hover {
  border-color: var(--accent);
  color: var(--accent2);
  background: rgba(167, 139, 250, 0.14);
}

.nav-search-btn svg {
  display: block;
}

/* Language Toggle Switch */
.language-toggle {
  height: 38px;
  min-height: 38px;
  min-width: 44px;
  padding: 0 10px;
  gap: 5px;
  border: 1px solid var(--border-dim);
  border-radius: 11px;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text);
  font-family: inherit;
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.16s var(--ease);
}

.language-toggle::before {
  content: '\6587';
  font-size: 13px;
  line-height: 1;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans CJK SC", "Source Han Sans", sans-serif;
  color: var(--accent2);
  transition: color 0.16s var(--ease);
}

html[data-mode="light"] .language-toggle {
  background: rgba(255, 255, 255, 0.7);
}

.language-toggle:hover {
  border-color: var(--accent);
  background: rgba(167, 139, 250, 0.14);
}

.language-toggle:hover::before {
  color: var(--text);
}

.language-toggle-label {
  display: none;
}

.language-toggle-current {
  letter-spacing: 0.06em;
  font-weight: 900;
  color: var(--accent2);
  transition: color 0.16s var(--ease);
}

.language-toggle:hover .language-toggle-current {
  color: var(--text);
}

/* Mode Toggle Switch */
.mode-toggle {
  position: relative;
  width: 58px;
  height: 38px;
  min-width: 58px;
  min-height: 38px;
  padding: 0;
  border: 1px solid var(--border-dim);
  border-radius: 11px;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s var(--ease);
}

html[data-mode="light"] .mode-toggle {
  background: rgba(255, 255, 255, 0.7);
}

.mode-toggle:hover {
  border-color: var(--accent);
}

.mode-toggle-icons {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 9px;
  font-size: 11px;
  color: var(--muted);
  pointer-events: none;
  opacity: 0.6;
}

.mode-toggle-icons .icon-moon {
  color: var(--accent2);
}

.mode-toggle-icons .icon-sun {
  color: #facc15;
}

.mode-toggle-knob {
  position: absolute;
  top: 4px;
  left: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: linear-gradient(145deg, var(--accent2), var(--accent));
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
  transition: transform 0.22s var(--ease), background 0.22s var(--ease);
  z-index: 2;
}

.mode-toggle-knob::before {
  content: '\263E';
  font-size: 13px;
  line-height: 1;
  color: var(--on-accent);
  display: block;
}

.mode-toggle.is-light .mode-toggle-knob {
  transform: translateX(20px);
  background: linear-gradient(145deg, #fde047, #f59e0b);
}

.mode-toggle.is-light .mode-toggle-knob::before {
  content: '\2600';
  font-size: 13px;
  color: #78350f;
}

/* Mobile responsive drawer */
@media (max-width: 900px) {
  header {
    min-height: 62px;
    position: sticky;
    top: 0;
    z-index: 1000;
  }

  .nav-burger {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    width: 36px;
    height: 36px;
    min-width: 36px;
    min-height: 36px;
    padding: 0;
    border-radius: 9px;
    flex-shrink: 0;
  }

  .nav-burger-line {
    width: 15px;
    height: 2px;
  }

  .nav-burger[aria-expanded="true"] .nav-burger-line:nth-child(1),
  .nav-burger.open .nav-burger-line:nth-child(1),
  body.nav-open .nav-burger .nav-burger-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .nav-burger[aria-expanded="true"] .nav-burger-line:nth-child(3),
  .nav-burger.open .nav-burger-line:nth-child(3),
  body.nav-open .nav-burger .nav-burger-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .nav-search-btn {
    height: 36px;
    width: 36px;
    min-height: 36px;
    min-width: 36px;
    border-radius: 9px;
    flex-shrink: 0;
  }

  .language-toggle {
    height: 36px;
    min-height: 36px;
    min-width: 36px;
    padding: 0 8px;
    border-radius: 9px;
    font-size: 11px;
    flex-shrink: 0;
  }

  .mode-toggle {
    height: 36px;
    min-height: 36px;
    width: 54px;
    min-width: 54px;
    border-radius: 9px;
    flex-shrink: 0;
  }

  .mode-toggle-icons {
    padding: 0 7px;
    font-size: 10px;
  }

  .mode-toggle-knob {
    width: 26px;
    height: 26px;
    top: 4px;
    left: 4px;
    border-radius: 6px;
  }

  .mode-toggle.is-light .mode-toggle-knob {
    transform: translateX(18px);
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: var(--page-gutter);
    right: var(--page-gutter);
    width: auto;
    max-height: calc(100dvh - 85px);
    overflow-y: auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    margin: 0;
    padding: 10px;
    border: 1px solid var(--border-dim);
    border-radius: 16px;
    background: var(--card-solid);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.55);
    z-index: 1500;
  }

  html[data-mode="light"] .site-nav {
    background: #ffffff;
    border-color: rgba(167, 139, 250, 0.28);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.14);
  }

  .site-nav.open {
    display: flex;
  }

  .nav-link {
    width: 100%;
    min-height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 0.9rem;
    font-size: 13px;
    font-weight: 800;
    border-radius: 10px;
  }
}

@media (max-width: 620px) {
  .logo-img {
    height: 38px;
    width: auto;
    max-width: 160px;
  }
}

@media (max-width: 420px) {
  .logo-img {
    height: 34px;
    width: auto;
    max-width: 135px;
  }
  .header-right {
    gap: 4px;
  }
}