/* Header & Navigation - Modern Design 2025 */

:root {
  --header-primary: #0aa5a6;
  --header-secondary: #14c4c5;
  --header-dark: rgba(13, 13, 13, 0.9);
  --header-light: #ffffff;
  --header-text-primary: #ffffff;
  --header-text-secondary: #b0b0b0;
  --header-accent: rgba(10, 165, 166, 0.2);
  --header-gradient: linear-gradient(
    135deg,
    var(--header-primary),
    var(--header-secondary)
  );
  --header-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  --header-transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
  --header-glass: rgba(13, 13, 13, 0.85);
  --header-glass-scrolled: rgba(10, 10, 10, 0.95);
}

/* Main header styling */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--header-transition);
  padding: 20px 0;
  background: var(--header-dark);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* Scrolled state with smaller size and darker background */
.site-header.scrolled {
  padding: 12px 0;
  background: var(--header-glass-scrolled);
  box-shadow: var(--header-shadow);
}

/* Container for header content */
.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 30px;
}

/* Logo styling */
.brand-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--header-light);
}

/* Logo image */
.logo-img {
  width: 50px;
  height: 50px;
  transition: var(--header-transition);
  filter: drop-shadow(0 2px 8px rgba(10, 165, 166, 0.4));
}

.site-header.scrolled .logo-img {
  width: 40px;
  height: 40px;
}

/* Logo text */
.logo-text {
  margin-left: 12px;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--header-light);
  position: relative;
  transition: var(--header-transition);
  opacity: 1;
}

/* Logo text accent character */
.logo-text span {
  color: var(--header-primary);
}

/* Hide logo text when scrolled on mobile */
@media (max-width: 768px) {
  .site-header.scrolled .logo-text {
    display: none;
  }
}

/* Navigation menu */
.site-nav {
  display: flex;
  align-items: center;
}

/* Main navigation list */
.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 5px;
  position: relative;
}

/* Navigation items */
.nav-item {
  position: relative;
}

/* Navigation links */
.nav-link {
  display: block;
  padding: 10px 16px;
  color: var(--header-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  transition: var(--header-transition);
  border-radius: 30px;
  position: relative;
  z-index: 2;
}

/* Active and hover states */
.nav-link:hover,
.nav-link.active {
  color: var(--header-light);
}

/* Navigation indicator - the moving highlight */
.nav-indicator {
  position: absolute;
  height: 36px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--header-accent);
  border-radius: 30px;
  z-index: 1;
  transition: var(--header-transition);
}

/* Mobile menu toggle button */
.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--header-light);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  transition: var(--header-transition);
}

.mobile-menu-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* CTA button in nav */
.nav-cta {
  margin-left: 20px;
  padding: 10px 20px;
  background: var(--header-gradient);
  color: white;
  border-radius: 30px;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: var(--header-transition);
  box-shadow: 0 5px 15px rgba(10, 165, 166, 0.3);
  border: none;
  cursor: pointer;
  white-space: nowrap;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(10, 165, 166, 0.4);
}

/* Responsive styles */
@media (max-width: 1024px) {
  .nav-link {
    padding: 10px 12px;
    font-size: 0.95rem;
  }

  .nav-cta {
    padding: 8px 16px;
    font-size: 0.85rem;
  }
}

@media (max-width: 992px) {
  .nav-list {
    gap: 2px;
  }

  .nav-link {
    padding: 8px 10px;
    font-size: 0.9rem;
  }

  .nav-indicator {
    height: 32px;
  }
}

@media (max-width: 860px) {
  .nav-cta {
    display: none;
  }
}

@media (max-width: 768px) {
  .site-header {
    padding: 15px 0;
  }

  .header-container {
    padding: 0 20px;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .nav-list {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background: var(--header-glass-scrolled);
    flex-direction: column;
    align-items: center;
    padding: 20px 0;
    gap: 10px;
    box-shadow: var(--header-shadow);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--header-transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    max-height: calc(100vh - 80px);
    overflow-y: auto;
    z-index: 10;
  }

  .nav-list.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .site-header.scrolled .nav-list {
    top: 64px;
  }

  .nav-item {
    width: 80%;
    text-align: center;
  }

  .nav-link {
    padding: 12px;
    font-size: 1rem;
    border-radius: 5px;
  }

  .nav-link:hover,
  .nav-link.active {
    background: rgba(255, 255, 255, 0.1);
  }

  .nav-indicator {
    display: none;
  }

  .nav-cta {
    display: inline-block;
    margin: 10px 0 0 0;
    width: 80%;
    text-align: center;
    padding: 12px 20px;
  }
}

@media (max-width: 480px) {
  .logo-text {
    font-size: 1.2rem;
  }

  .site-header .logo-img {
    width: 40px;
    height: 40px;
  }

  .site-header.scrolled .logo-img {
    width: 36px;
    height: 36px;
  }
}

/* Animations */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.site-header {
  animation: fadeInDown 0.6s ease forwards;
}