/* Layout & Structure */

/* Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-accent-primary);
  color: #fff;
  padding: 8px;
  z-index: 2000;
  transition: top 0.2s;
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
}

/* Header */
.main-header {
  background-color: rgba(10, 25, 47, 0.85);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--color-bg-hover);
  padding: var(--spacing-md) 0;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-family-mono);
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.text-accent {
  color: var(--color-accent-primary);
}

/* Navigation */
.main-nav {
  display: none; /* Mobile first: hidden by default or toggleable */
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--color-text-secondary);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  position: relative;
  padding: var(--spacing-xs) 0;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent-primary);
}

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

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

/* Mobile Toggle */
.mobile-menu-toggle {
  display: block;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.bar {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  background-color: var(--color-accent-primary);
  transition: var(--transition-fast);
}

/* Responsive Breakpoints */

/* Mobile (~360px) is our base */

/* Tablet (768px) */
@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }

  .main-nav {
    display: block;
  }
}

/* Desktop (1024px) */
@media (min-width: 1024px) {
    .container {
        max-width: 1000px;
    }
    
    .dashboard-grid {
        gap: var(--spacing-xl);
    }
}

/* Mobile Nav Open State */
@media (max-width: 767px) {
    .main-nav.open {
        display: block;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-bg-deep);
        border-bottom: 1px solid var(--color-bg-hover);
        padding: var(--spacing-md);
        box-shadow: var(--shadow-card);
        animation: slideDown 0.3s ease-out;
    }
    
    .main-nav.open .nav-list {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}


/* Main Content Area */
main {
  flex: 1;
  padding-top: var(--spacing-2xl);
  padding-bottom: var(--spacing-2xl);
}

.section-header {
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-bg-hover);
    padding-bottom: var(--spacing-sm);
}

.hidden-section {
    display: none;
}

.active-section {
    display: block;
    animation: fadeIn var(--transition-normal);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Footer */
.main-footer {
  padding: var(--spacing-lg) 0;
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-bg-hover);
  margin-top: auto;
}