/* ============================================
   HEADER CSS - OncologyAI
   Contains: Loading Screen, Header, Mobile Nav
   ============================================ */

/* ============================================
   LOADING SCREEN
   ============================================ */
   div#loading{
    display:none;
   }
.loading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--dark-canvas);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.loading.loaded {
  opacity: 0;
  visibility: hidden;
}

.loading__content {
  text-align: center;
}

.loading__dna {
  width: 80px;
  height: 80px;
  position: relative;
  margin: 0 auto 20px;
}

.loading__dna span {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--oncology-blue);
  border-radius: 50%;
  animation: dna-loader 2s ease-in-out infinite;
}

.loading__dna span:nth-child(1) { left: 0; animation-delay: 0s; }
.loading__dna span:nth-child(2) { left: 22px; animation-delay: 0.2s; }
.loading__dna span:nth-child(3) { left: 44px; animation-delay: 0.4s; }
.loading__dna span:nth-child(4) { left: 66px; animation-delay: 0.6s; }

@keyframes dna-loader {
  0%, 100% { transform: translateY(0) scale(1); background: var(--oncology-blue); }
  50% { transform: translateY(-30px) scale(1.2); background: var(--remission-green); }
}

.loading__text {
  color: rgba(255,255,255,0.6);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* ============================================
   HEADER
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: transparent;
  transition: all var(--transition-normal);
}

.header.scrolled {
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(20px);
  box-shadow: 0 4px 30px rgba(0,0,0,0.2);
}

.header__container {
  
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 90px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
  background: rgba(15, 23, 42, 0.95);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 1001;
}

.header__logo-icon {
  width: 50px;
  height: 50px;
  background: var(--gradient-hero);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.header__logo-icon::before {
  content: '';
  position: absolute;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: logo-shine 3s ease-in-out infinite;
}

@keyframes logo-shine {
  0% { transform: translateX(-100%) rotate(45deg); }
  100% { transform: translateX(100%) rotate(45deg); }
}

.header__logo-icon svg {
  width: 28px;
  height: 28px;
  color: var(--white);
  position: relative;
  z-index: 1;
}

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

.header__logo-text .logo-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.5px;
}

.header__logo-text .logo-subtitle {
  font-size: 11px;
  color: rgba(255,255,255,0.6);
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* Navigation */
.header__nav {
  display: flex;
  align-items: center;
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.header__nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 10px;
  color: rgba(255,255,255,0.8);
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  transition: all var(--transition-normal);
  position: relative;
}

.header__nav-link:hover {
  color: var(--white);
  background: rgba(255,255,255,0.1);
}

.header__nav-link.active {
  color: var(--oncology-blue);
  background: rgba(59, 130, 246, 0.15);
}

.header__nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  background: var(--oncology-blue);
  border-radius: 2px;
}

.header__nav-link .nav-icon {
  width: 18px;
  height: 18px;
  transition: all var(--transition-normal);
}

.header__nav-link:hover .nav-icon {
  transform: scale(1.15);
  filter: drop-shadow(0 0 6px currentColor);
}

/* CTA Button */
.header__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--oncology-blue);
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
  border-radius: 10px;
  transition: all var(--transition-normal);
}

.header__cta:hover {
  background: #2563EB;
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.4);
}

/* Mobile Toggle */
.header__mobile-toggle {
  display: none;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.1);
  border: none;
  border-radius: 10px;
  z-index: 1001;
}

.hamburger {
  width: 24px;
  height: 18px;
  position: relative;
}

.hamburger span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 8px; }
.hamburger span:nth-child(3) { bottom: 0; }

.header__mobile-toggle.active .hamburger span:nth-child(1) {
  transform: rotate(45deg);
  top: 8px;
}

.header__mobile-toggle.active .hamburger span:nth-child(2) {
  opacity: 0;
}

.header__mobile-toggle.active .hamburger span:nth-child(3) {
  transform: rotate(-45deg);
  bottom: 8px;
}

@media (max-width: 1200px) {
  .header__nav, .header__cta { display: none; }
  .header__mobile-toggle { display: flex; }
}

/* ============================================
   MOBILE NAVIGATION
   ============================================ */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--dark-canvas);
  z-index: 999;
  padding: 120px 24px 40px;
  transform: translateX(-100%);
  transition: transform var(--transition-slow);
  overflow-y: auto;
}

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

.mobile-nav__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.mobile-nav__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px 16px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  color: var(--white);
  transition: all var(--transition-normal);
}

.mobile-nav__item:hover,
.mobile-nav__item.active {
  background: rgba(59,130,246,0.15);
  border-color: var(--oncology-blue);
}

.mobile-nav__item .nav-icon {
  width: 24px;
  height: 24px;
  color: var(--oncology-blue);
}

.mobile-nav__item span {
  font-size: 13px;
  font-weight: 500;
}

.mobile-nav__cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 18px;
  background: var(--oncology-blue);
  color: var(--white);
  font-size: 16px;
  font-weight: 600;
  border-radius: 12px;
}


img.logo-oncolbs {
    border-radius: 20px;
}
.header__logo-text1 {
    width: 221px;
}