/* Layout: header, navigation, mobile menu, main, containers, background */

.animated-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  overflow: hidden;
}
.particles {
  display: none;
}
.gradient-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, #e0f2fe, #f1f5f9, #ede9fe);
  background-size: 300% 300%;
  animation: gradientPan 30s ease-in-out infinite;
  opacity: 0.6;
}

/* Subtle grid overlay */
.animated-background::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
      0deg,
      rgba(0, 0, 0, 0.04) 0,
      rgba(0, 0, 0, 0.04) 1px,
      transparent 1px,
      transparent 16px
    ),
    repeating-linear-gradient(
      90deg,
      rgba(0, 0, 0, 0.04) 0,
      rgba(0, 0, 0, 0.04) 1px,
      transparent 1px,
      transparent 16px
    );
  pointer-events: none;
  mix-blend-mode: overlay;
}

@keyframes gradientPan {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-normal);
}
.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}
.logo {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  transition: var(--transition-fast);
}
.logo:hover {
  transform: scale(1.05);
}
.logo i {
  font-size: 1.5rem;
}
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}
.nav-link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
  position: relative;
  font-size: 0.95rem;
}
.nav-link:hover {
  color: var(--primary-color);
  background-color: var(--bg-secondary);
}
.nav-link.active {
  color: var(--primary-color);
  background-color: rgba(37, 99, 235, 0.1);
}
.nav-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: var(--transition-fast);
  transform: translateX(-50%);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
@media (max-width: 900px) {
  .nav {
    gap: var(--space-md);
  }
  .header-container {
    padding: 0 var(--space-md);
    height: 64px;
  }
  .main {
    margin-top: 64px;
  }
}

@media (max-width: 700px) {
  .nav {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
  .header-container {
    height: 56px;
    padding: 0 var(--space-sm);
  }
  .main {
    margin-top: 56px;
  }
}
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}
.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition-fast);
}
.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}
.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}
.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}
.mobile-menu {
  position: fixed;
  top: 80px;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-normal);
  z-index: var(--z-sticky);
}
.mobile-menu.show {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}
.mobile-menu-container {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.main {
  margin-top: 80px;
  position: relative;
}
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-lg);
}