/* ============================================================
   HEADER.CSS — QuickDevUtils.com
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: background-color var(--transition), border-color var(--transition);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

@media (min-width: 768px) {
  .nav-container { padding: 0 var(--spacing-lg); height: 64px; }
}

/* ---- Logo ---- */
.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition: color var(--transition);
  letter-spacing: -0.02em;
}
.logo:hover { opacity: 0.85; }
.logo-img { height: 36px; width: auto; display: block; }

/* ---- Desktop Nav Links ---- */
.nav-links {
  display: none;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: var(--spacing-xs);
}

@media (min-width: 640px) {
  .nav-links {
    display: flex;
    align-items: center;
  }
}

.nav-links a {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background-color var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background-color: var(--bg-secondary);
}

/* ---- Right Side Controls ---- */
.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* ---- Theme Toggle ---- */
#theme-toggle {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem;
  cursor: pointer;
  font-size: 1.125rem;
  line-height: 1;
  min-width: 40px;
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition), border-color var(--transition);
  color: var(--text-primary);
  -webkit-tap-highlight-color: transparent;
}
#theme-toggle:hover { background-color: var(--bg-tertiary); }
#theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---- Mobile Menu Toggle ---- */
.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  min-width: 40px;
  min-height: 40px;
  -webkit-tap-highlight-color: transparent;
}
.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.mobile-menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.mobile-menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (min-width: 640px) {
  .mobile-menu-btn { display: none; }
}

/* ---- Mobile Dropdown ---- */
.mobile-nav {
  display: none;
  border-top: 1px solid var(--border);
  background-color: var(--bg-primary);
  padding: var(--spacing-sm) var(--spacing-md);
}
.mobile-nav.open { display: block; }

.mobile-nav a {
  display: block;
  padding: 0.75rem 0.5rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a:hover, .mobile-nav a.active { color: var(--accent); }

/* Mobile Tools Accordion */
.mobile-nav-tools {
  border-bottom: 1px solid var(--border);
}

.mobile-tools-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.75rem 0.5rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--transition);
  text-align: left;
}
.mobile-tools-toggle svg {
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.mobile-tools-toggle.open { color: var(--accent); }
.mobile-tools-toggle.open svg { transform: rotate(180deg); }
.mobile-tools-toggle:hover { color: var(--accent); }

.mobile-tools-list {
  display: none;
  flex-direction: column;
  gap: 2px;
  padding: 4px 0 10px 0.5rem;
}
.mobile-tools-list.open {
  display: flex;
}

.mobile-tools-item {
  display: flex !important;
  align-items: center;
  gap: 10px;
  padding: 9px 10px !important;
  border-bottom: none !important;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem !important;
  color: var(--text-secondary) !important;
  text-decoration: none;
  transition: background-color var(--transition), color var(--transition) !important;
}
.mobile-tools-item:hover {
  background-color: var(--bg-secondary);
  color: var(--accent) !important;
}
.mobile-tools-icon {
  display: flex;
  align-items: center;
  color: var(--accent);
  flex-shrink: 0;
}

/* ---- Tools Mega Menu ---- */
.nav-item-tools {
  position: static;
  list-style: none;
}

.nav-tools-trigger {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 0.5rem 0.75rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color var(--transition), background-color var(--transition);
  white-space: nowrap;
}
.nav-tools-trigger:hover,
.nav-tools-trigger[aria-expanded="true"] {
  color: var(--accent);
  background-color: var(--bg-secondary);
}
.nav-tools-trigger svg {
  transition: transform 0.22s ease;
}
.nav-tools-trigger[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.tools-mega {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 24px 64px rgba(0,0,0,0.13), 0 4px 16px rgba(0,0,0,0.06);
  z-index: 200;
  animation: megaFadeIn 0.22s cubic-bezier(0.16,1,0.3,1) both;
}
.tools-mega.open { display: block; }

@keyframes megaFadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.tools-mega-inner {
  display: flex;
  align-items: stretch;
}

/* ---- Sidebar ---- */
.tools-mega-sidebar {
  width: 260px;
  flex-shrink: 0;
  background:
    radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px),
    linear-gradient(155deg, #2563eb 0%, #1d4ed8 50%, #1e3a8a 100%);
  background-size: 22px 22px, 100% 100%;
  padding: 28px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  overflow: hidden;
}

.tools-mega-sidebar-icon {
  opacity: 0.9;
  margin-bottom: 4px;
}

.tools-mega-sidebar-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0;
}

.tools-mega-sidebar-sub {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.72);
  line-height: 1.6;
  margin: 0;
  flex: 1;
}

.tools-mega-sidebar-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: #1d4ed8;
  background: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
  width: fit-content;
  margin-top: auto;
}
.tools-mega-sidebar-cta:hover {
  background: #000 !important;
  color: #fff !important;
}

/* ---- Grid ---- */
.tools-mega-grid-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 16px 24px;
}

.tools-mega-grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  align-content: start;
}

/* Staggered entrance animation — GPU only (opacity + transform) */
@keyframes itemSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.tools-mega.open .mega-tool-item {
  animation: itemSlideIn 0.28s cubic-bezier(0.16,1,0.3,1) both;
}
.tools-mega.open .mega-tool-item:nth-child(1) { animation-delay: 0.04s; }
.tools-mega.open .mega-tool-item:nth-child(2) { animation-delay: 0.07s; }
.tools-mega.open .mega-tool-item:nth-child(3) { animation-delay: 0.10s; }
.tools-mega.open .mega-tool-item:nth-child(4) { animation-delay: 0.13s; }
.tools-mega.open .mega-tool-item:nth-child(5) { animation-delay: 0.16s; }
.tools-mega.open .mega-tool-item:nth-child(6) { animation-delay: 0.19s; }
.tools-mega.open .mega-tool-item:nth-child(7) { animation-delay: 0.22s; }
.tools-mega.open .mega-tool-item:nth-child(8) { animation-delay: 0.25s; }
.tools-mega.open .mega-tool-item:nth-child(9) { animation-delay: 0.28s; }

.mega-tool-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  position: relative;
}
.mega-tool-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 22%;
  height: 56%;
  width: 2px;
  background: var(--accent);
  border-radius: 2px;
  opacity: 0;
  transform: scaleY(0.5);
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.mega-tool-item:hover {
  background-color: var(--bg-secondary);
  border-color: var(--border);
}
.mega-tool-item:hover::before {
  opacity: 1;
  transform: scaleY(1);
}
.mega-tool-item:hover .mega-tool-icon {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.mega-tool-item:hover .mega-tool-name {
  color: var(--accent);
}

.mega-tool-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--accent);
  flex-shrink: 0;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.mega-tool-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.mega-tool-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color 0.15s ease;
}

.mega-tool-desc {
  font-size: 0.75rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Tablet: hide sidebar, 2-col grid */
@media (max-width: 900px) {
  .tools-mega-sidebar { display: none; }
  .tools-mega-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  .tools-mega,
  .tools-mega.open .mega-tool-item { animation: none; }
}