/* Header Styles */
#header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: transparent;
  z-index: 1000;
  transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

#header.scrolled {
  background-color: var(--color-background);
  box-shadow: 0 0.2rem 1rem rgba(0, 0, 0, 0.1);
}

#header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
}

.logo-text {
  font-family: 'Poppins', sans-serif;
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  gap: var(--space-3);
}

.nav-links a {
  position: relative;
  color: var(--color-text);
  font-weight: 500;
  padding: 0.8rem 0;
  transition: color var(--transition-fast);
}

.nav-links a:hover, 
.nav-links a.active {
  color: var(--color-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links .btn-primary {
  border-radius: var(--radius-full);
  padding: 0.8rem 2rem;
}

.nav-links .btn-primary::after {
  display: none;
}

.header-btns {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

#theme-toggle {
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  background-color: transparent;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

#theme-toggle:hover {
  background-color: var(--color-background-alt);
}

#theme-toggle .fa-sun {
  display: none;
}

[data-theme="dark"] #theme-toggle .fa-moon {
  display: none;
}

[data-theme="dark"] #theme-toggle .fa-sun {
  display: block;
  color: var(--color-primary);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 3rem;
  height: 2rem;
}

.mobile-menu-btn span {
  height: 2px;
  width: 100%;
  background-color: var(--color-text);
  transition: all var(--transition-fast);
}

.mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background-color: var(--color-background);
  padding: var(--space-3);
  z-index: 999;
  transform: translateX(-100%);
  transition: transform var(--transition-normal);
}

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

.mobile-menu ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-menu a {
  display: block;
  font-size: 2rem;
  padding: var(--space-1) 0;
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.mobile-menu a:hover {
  color: var(--color-primary);
}

@media (max-width: 992px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }
}