/* ═══ HEADER ═══ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  transition: background 0.35s ease, box-shadow 0.35s ease, transform 0.35s ease;
  padding: 20px 0;
}
.site-header.scrolled {
  background: var(--white);
  box-shadow: 0 1px 0 var(--border), 0 4px 24px rgba(0,0,0,0.06);
  padding: 12px 0;
}
.site-header.hidden-header { transform: translateY(-100%); }

.header-inner {
  display: flex;
  align-items: center;
  gap: 40px;
}

/* Logo */
.site-logo { display: flex; align-items: center; }
.site-logo .custom-logo { height: 36px; width: auto; }
.logo-text {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--white);
  letter-spacing: -0.02em;
  transition: color var(--transition);
}
.scrolled .logo-text { color: var(--black); }
.logo-dot { color: var(--orange); }

/* Primary Nav */
.primary-nav { margin-left: auto; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-item > a, .nav-link-parent {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: rgba(255,255,255,0.85);
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
  cursor: pointer;
  background: none;
  border: none;
  font-family: var(--font-body);
}
.scrolled .nav-item > a,
.scrolled .nav-link-parent { color: var(--mid); }
.nav-item > a:hover, .nav-link-parent:hover,
.nav-item.current > a, .nav-item.current .nav-link-parent {
  color: var(--orange);
}
.chevron { transition: transform var(--transition); }
.has-mega-menu.mega-open .chevron { transform: rotate(180deg); }

/* ─── MEGA MENU ─── */
.mega-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  padding: 16px;
  min-width: 420px;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.has-mega-menu { position: relative; }
.has-mega-menu.mega-open .mega-menu {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}
.mega-menu-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 16px 12px;
  border-radius: var(--radius);
  text-align: center;
  transition: background var(--transition);
  color: var(--dark);
}
.mega-menu-item:hover { background: var(--bg); }
.mega-menu-item:hover .mega-label { color: var(--orange); }
.mega-icon { font-size: 1.6rem; line-height: 1; }
.mega-label { font-size: 0.8rem; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; }

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: 8px;
}
.search-toggle {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  color: rgba(255,255,255,0.8);
  transition: var(--transition);
}
.scrolled .search-toggle { color: var(--mid); }
.search-toggle:hover { color: var(--orange); background: rgba(232,98,10,0.08); }
.btn-sm { padding: 10px 20px; font-size: 0.78rem; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px; height: 36px;
  padding: 4px;
}
.hamburger span {
  display: block;
  height: 1.5px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
  transform-origin: center;
}
.scrolled .hamburger span { background: var(--dark); }
.hamburger.active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ─── SEARCH OVERLAY ─── */
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,15,15,0.95);
  z-index: 2000;
  display: flex;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.search-overlay.open { opacity: 1; pointer-events: all; }
.search-overlay-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  width: 100%;
}
.search-overlay-inner form {
  flex: 1;
  display: flex;
  align-items: center;
  border-bottom: 1.5px solid rgba(255,255,255,0.3);
  gap: 16px;
}
.search-overlay-inner input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--white);
  font-size: clamp(1.2rem, 3vw, 2rem);
  font-family: var(--font-display);
  padding: 20px 0;
}
.search-overlay-inner input::placeholder { color: rgba(255,255,255,0.35); }
.search-overlay-inner button[type=submit] { color: rgba(255,255,255,0.6); transition: var(--transition); }
.search-overlay-inner button[type=submit]:hover { color: var(--orange); }
.search-close {
  color: rgba(255,255,255,0.6);
  padding: 8px;
  transition: var(--transition);
  border-radius: 50%;
}
.search-close:hover { color: var(--white); background: rgba(255,255,255,0.1); }

/* ─── MOBILE MENU ─── */
.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background: var(--white);
  z-index: 999;
  padding: 100px 24px 40px;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
}
.mobile-menu-overlay.open { transform: translateX(0); }
.mobile-nav-list { display: flex; flex-direction: column; gap: 4px; }
.mobile-nav-list > li > a,
.mobile-sub-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  font-size: 1.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--dark);
  border-bottom: 1px solid var(--border);
  width: 100%;
  text-align: left;
}
.mobile-sub { display: none; padding: 8px 0; }
.mobile-sub.open { display: block; }
.mobile-sub li a {
  display: block;
  padding: 10px 16px;
  font-size: 1rem;
  color: var(--gray);
  border-radius: var(--radius);
}
.mobile-sub li a:hover { color: var(--orange); background: var(--bg); }

/* Breadcrumb */
.breadcrumb-bar { background: var(--bg); border-bottom: 1px solid var(--border); padding: 12px 0; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.8rem; color: var(--light-gray); flex-wrap: wrap; }
.breadcrumb a { color: var(--gray); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--orange); }
.breadcrumb span[aria-current] { color: var(--dark); font-weight: 500; }

/* Toast */
.chocoo-toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--dark);
  color: var(--white);
  padding: 12px 24px;
  border-radius: 100px;
  font-size: 0.875rem;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
  white-space: nowrap;
}
.chocoo-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Page Hero */
.page-hero {
  padding: 160px 0 80px;
  background: var(--dark);
  position: relative;
  overflow: hidden;
}
.page-hero-sm { padding: 130px 0 64px; }
.page-hero-content { position: relative; z-index: 1; }
.page-hero .eyebrow { color: var(--orange); }
.page-hero h1 { color: var(--white); margin: 8px 0 16px; }
.page-hero p { color: rgba(255,255,255,0.65); font-size: 1.1rem; max-width: 480px; }
.about-hero { min-height: 60vh; display: flex; align-items: flex-end; }
.about-hero .container { width: 100%; }
.about-hero-bg { position: absolute; inset: 0; }
.about-hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.about-hero::after { content:''; position:absolute; inset:0; background:linear-gradient(to top, rgba(15,15,15,0.85), rgba(15,15,15,0.3)); }
.about-hero .page-hero-content { padding-bottom: 60px; }

/* Reading Progress */
#reading-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  background: var(--orange);
  z-index: 9998;
  width: 0%;
  transition: width 0.1s linear;
}

@media (max-width: 1024px) {
  .primary-nav { display: none; }
  .hamburger { display: flex; }
  .header-actions .btn { display: none; }
}
@media (max-width: 480px) {
  .page-hero { padding: 120px 0 56px; }
}