/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  z-index: 1000;
  transition: background var(--transition-normal), backdrop-filter var(--transition-normal);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(5, 8, 20, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-brand i {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: inherit !important;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}

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

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

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-purple);
  color: #000;
  box-shadow: var(--glow-cyan);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow-cyan-strong);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  background: var(--bg-surface-hover);
  border-color: var(--text-secondary);
}

/* --- Cards --- */
.glass-card {
  background: var(--bg-surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-surface);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 240, 255, 0.3);
  box-shadow: var(--glow-cyan);
}

/* --- Social Icons --- */
.social-links {
  display: flex;
  gap: 1.5rem;
}

.social-link {
  color: var(--text-secondary);
  font-size: 1.5rem;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.social-link .fa-twitter {
  color: var(--social-twitter);
}

.social-link .fa-linkedin {
  color: var(--social-linkedin);
}

.social-link .fa-github {
  color: var(--social-github);
}

.social-link:hover {
  transform: translateY(-3px);
}

/* --- Footer --- */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
  margin-top: 4rem;
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer p {
  margin: 0;
  font-size: 0.9rem;
}

/* --- Workbench --- */
.workbench {
    padding: 4rem 0;
}

.section-header {
    margin-bottom: 3rem;
}

.section-header h2 {
    margin-bottom: 0.5rem;
}

.workbench-category {
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-color);
}

.workbench-category:last-child {
    border-bottom: none;
}

.category-title {
    font-family: var(--font-sans);
    color: var(--accent-purple);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
}

.workbench-item {
    padding: 1rem 0;
}

.workbench-item:hover .item-title {
    color: var(--accent-cyan);
}

.item-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.25rem;
}

.item-title {
    font-weight: 600;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.item-state {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.item-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

/* Progress bar - only for Studying */
.progress-bar {
    margin-top: 0.75rem;
    height: 4px;
    background: var(--bg-surface);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: width var(--transition-normal);
}

/* Status dot - only for Homelab */
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-dot.healthy {
    background: #22c55e;
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.6), 0 0 16px rgba(34, 197, 94, 0.3);
    animation: pulse-healthy 2s ease-in-out infinite;
}

.status-dot.degraded {
    background: #f59e0b;
    box-shadow: 0 0 8px rgba(245, 158, 11, 0.6), 0 0 16px rgba(245, 158, 11, 0.3);
}

.status-dot.offline {
    background: #ef4444;
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.6), 0 0 16px rgba(239, 68, 68, 0.3);
}

@keyframes pulse-healthy {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Status text */
.status-text {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-left: 0.5rem;
}

.status-text.healthy { color: #22c55e; }
.status-text.degraded { color: #f59e0b; }
.status-text.offline { color: #ef4444; }

/* --- Workbench Grid --- */
.workbench-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* --- Homelab Columns --- */
.homelab-columns {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.homelab-column-header {
    font-family: var(--font-sans);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.homelab-column {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.workbench-item {
    padding: 1.5rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all var(--transition-normal);
}

.workbench-item.workbench-item-link {
    display: block;
    color: inherit;
}

.workbench-item.workbench-item-link:hover,
.workbench-item.workbench-item-link:focus-visible {
    color: inherit;
    border-color: var(--accent-cyan);
    box-shadow: var(--glow-cyan);
    transform: translateY(-2px);
}

.workbench-item:hover {
    border-color: var(--accent-cyan);
    box-shadow: var(--glow-cyan);
}

.workbench-item.workbench-item-link:hover .item-title,
.workbench-item.workbench-item-link:focus-visible .item-title {
    color: var(--accent-cyan);
}


/* --- Responsive --- */
@media (max-width: 768px) {
  .page-header {
    padding-top: 100px;
    padding-bottom: 30px;
  }

  .workbench-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .homelab-columns {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(5, 8, 20, 0.95);
    backdrop-filter: blur(12px);
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
  }

  .nav-links.show {
    display: flex;
  }

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

/* The seven-page navigation uses the existing mobile layout on tablets too. */
@media (min-width: 769px) and (max-width: 1024px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(5, 8, 20, 0.95);
    backdrop-filter: blur(12px);
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
  }
  .nav-links.show { display: flex; }
  .mobile-menu-btn { display: block; }
}
@media (max-width: 1024px) {
  .nav-links { max-height: calc(100dvh - var(--nav-height)); overflow-y: auto; }
}
.nav-links a { white-space: nowrap; }
a:focus-visible, button:focus-visible, canvas:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 4px;
}