/* ==========================================================================
   EXCELSIOR RESEARCH UNIFIED — NAVIGATION, TASKBAR ROI & MOBILE DRAWER (LIGHT)
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 0.85rem 0;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.03);
  transition: padding var(--trans-fast), background var(--trans-fast), border-color var(--trans-fast), box-shadow var(--trans-fast);
}

.site-header.scrolled {
  padding: 0.65rem 0;
  background: rgba(255, 255, 255, 0.98);
  border-bottom-color: rgba(14, 165, 233, 0.25);
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

/* Brand Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  text-decoration: none;
}

.brand-logo-img {
  height: 72px;
  width: auto;
  max-width: 280px;
  object-fit: contain;
  display: block;
  transition: transform var(--trans-fast), height var(--trans-fast);
}

.site-header.scrolled .brand-logo-img {
  height: 60px;
}

.brand-logo:hover .brand-logo-img {
  transform: scale(1.03);
}

@media (max-width: 768px) {
  .brand-logo-img {
    height: 44px !important;
    max-width: 190px !important;
  }
}

.logo-icon-box {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #0ea5e9, #0f172a);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.35);
  position: relative;
  overflow: hidden;
}

.logo-icon-box::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom right, rgba(255, 255, 255, 0.3), transparent);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-main {
  font-size: 1.22rem;
  font-weight: 800;
  line-height: 1.05;
  color: #0f172a;
}

.logo-sub {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  color: #0284c7;
  text-transform: uppercase;
  font-weight: 700;
}

/* Desktop Navigation Menu */
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0.2rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 600;
  color: #334155;
  transition: all var(--trans-fast);
}

.nav-link:hover, .nav-link.active {
  color: #0284c7;
  background: rgba(14, 165, 233, 0.08);
}

.nav-link .dropdown-chevron {
  width: 14px;
  height: 14px;
  transition: transform var(--trans-fast);
}

.nav-item:hover .dropdown-chevron {
  transform: rotate(180deg);
}

/* Dropdown Menu (Clean White Card) */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  width: 310px;
  padding: 0.75rem;
  background: #ffffff;
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: var(--radius-md);
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.12), 0 0 0 1px rgba(14, 165, 233, 0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--trans-fast);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(4px);
}

.dropdown-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: background var(--trans-fast);
}

.dropdown-item:hover {
  background: rgba(14, 165, 233, 0.08);
}

.dropdown-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid rgba(14, 165, 233, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.dropdown-info {
  display: flex;
  flex-direction: column;
}

.dropdown-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: #0f172a;
}

.dropdown-desc {
  font-size: 0.74rem;
  color: #64748b;
  line-height: 1.35;
}

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Top Taskbar ROI Estimator Pill */
.nav-roi-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.84rem;
  font-weight: 700;
  font-family: var(--font-mono);
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.35);
  color: #0284c7;
  transition: all var(--trans-fast);
  box-shadow: 0 2px 10px rgba(14, 165, 233, 0.15);
}

.nav-roi-pill:hover {
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
  border-color: #0284c7;
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 18px rgba(14, 165, 233, 0.35);
}

/* Download Media Kit Header Button */
.nav-download-kit-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  background: #f0fdf4;
  border: 1px solid #86efac;
  color: #166534;
  cursor: pointer;
  transition: all var(--trans-fast);
  white-space: nowrap;
}

.nav-download-kit-btn:hover {
  background: #16a34a;
  border-color: #16a34a;
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(22, 163, 74, 0.3);
}

.nav-download-kit-btn svg {
  transition: transform var(--trans-fast);
}

.nav-download-kit-btn:hover svg {
  transform: translateY(2px);
}

/* Media Kit Modal Popup */
.media-kit-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--trans-normal);
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.media-kit-modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.media-kit-modal {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-xl);
  box-shadow: 0 25px 60px rgba(15, 23, 42, 0.25);
  width: 100%;
  max-width: 560px;
  overflow: hidden;
  transform: scale(0.94) translateY(20px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.media-kit-modal-overlay.active .media-kit-modal {
  transform: scale(1) translateY(0);
}

.sound-toggle-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  color: #0284c7;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--trans-fast);
}

.sound-toggle-btn:hover {
  background: rgba(14, 165, 233, 0.12);
  border-color: #0ea5e9;
  box-shadow: var(--glow-sky);
}

.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  font-family: inherit;
  background: linear-gradient(135deg, #0ea5e9 0%, #0f172a 100%);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(14, 165, 233, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: transform var(--trans-fast), box-shadow var(--trans-fast);
}

.btn-nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(14, 165, 233, 0.45);
}

/* Hamburger Button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  gap: 5px;
  padding: 8px;
  z-index: 1001;
}

.mobile-menu-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: #0f172a;
  border-radius: 2px;
  transition: all var(--trans-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(10px);
}
.mobile-menu-btn.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Slide-Out Drawer (Clean Light Canvas) */
.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--trans-normal);
  z-index: 10000;
}

.mobile-drawer-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(88vw, 360px);
  background: #ffffff;
  border-left: 1px solid #e2e8f0;
  box-shadow: -15px 0 40px rgba(15, 23, 42, 0.15);
  z-index: 10001;
  display: flex;
  flex-direction: column;
  padding: 5rem 1.5rem 2rem;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: translateX(100%);
  transition: transform var(--trans-normal);
}

.mobile-drawer.active {
  transform: translateX(0);
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  list-style: none;
  margin-bottom: 2rem;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 700;
  color: #0f172a;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  cursor: pointer;
  user-select: none;
}

.mobile-nav-link:active, .mobile-nav-link.active {
  background: rgba(14, 165, 233, 0.12);
  border-color: rgba(14, 165, 233, 0.4);
  color: #0284c7;
}

.mobile-submenu-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.mobile-submenu {
  max-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0 0 0 1rem;
  transition: max-height 0.35s ease, padding 0.35s ease;
}

.mobile-submenu.open {
  max-height: 450px;
  padding: 0.5rem 0 0.5rem 1rem;
}

.mobile-submenu-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: #475569;
}

.mobile-submenu-link:active {
  color: #0284c7;
  background: rgba(14, 165, 233, 0.08);
}

.mobile-drawer-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mobile-contact-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.mobile-contact-chip {
  flex: 1 1 calc(50% - 0.5rem);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  color: #334155;
}

.mobile-contact-chip.whatsapp {
  background: rgba(37, 211, 102, 0.12);
  border-color: rgba(37, 211, 102, 0.35);
  color: #15803d;
}

.mobile-btn-cta {
  width: 100%;
  padding: 0.85rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  text-align: center;
  background: linear-gradient(135deg, #0ea5e9, #0f172a);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.4);
}

/* Responsive Navigation Breakpoint */
@media (max-width: 1040px) {
  .desktop-nav, .desktop-only {
    display: none !important;
  }
  .mobile-menu-btn {
    display: flex;
  }
}