/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 0; /* Terminal aesthetic: sharp corners */
  font-weight: 600;
  font-family: 'Inter', monospace;
  transition: all 0.2s ease;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.875rem;
}

.btn-primary {
  background-color: var(--prof-blue);
  color: #000000;
  border: 1px solid var(--prof-blue);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--prof-blue);
  box-shadow: 0 0 15px rgba(163, 255, 18, 0.3) inset, 0 0 15px rgba(163, 255, 18, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: var(--white-text);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background-color: rgba(163, 255, 18, 0.05);
  border-color: var(--prof-blue);
  color: var(--prof-blue);
}

/* Cards */
.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 0; /* Sharp corners */
  padding: 1.5rem;
  transition: all 0.2s ease;
  position: relative;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background-color: var(--prof-blue);
  transition: height 0.3s ease;
}

.card:hover {
  border-color: rgba(163, 255, 18, 0.4);
  box-shadow: 0 5px 20px rgba(0,0,0,0.5);
}

.card:hover::before {
  height: 100%;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--muted-grey);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  background-color: #000;
  border: 1px solid var(--border-subtle);
  border-radius: 0;
  color: var(--white-text);
  font-family: 'Inter', monospace;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--prof-blue);
  box-shadow: 0 0 8px rgba(163, 255, 18, 0.2);
}

/* KPI Box */
.kpi-row {
  display: flex;
  gap: 2rem;
  margin: 2rem 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1rem 0;
  background: rgba(17, 17, 17, 0.5);
}

.kpi-item {
  display: flex;
  flex-direction: column;
}

.kpi-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--prof-blue);
  text-shadow: 0 0 10px rgba(163, 255, 18, 0.3);
}

.kpi-label {
  font-size: 0.75rem;
  color: var(--muted-grey);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Project Insight Target */
.insight-highlight {
  background-color: rgba(163, 255, 18, 0.05);
  border-left: 4px solid var(--prof-blue);
  padding: 1rem;
  margin-top: 1rem;
  border-radius: 0;
  font-family: monospace;
  font-size: 0.9rem;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  background-color: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--muted-grey);
  font-size: 0.75rem;
  border-radius: 0;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Tabs UI for Case Studies */
.tabs-header {
  display: flex;
  gap: 1rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 2rem;
  overflow-x: auto;
  white-space: nowrap;
}

.tab-btn {
  background: none;
  color: var(--muted-grey);
  padding: 0.75rem 0;
  border-bottom: 2px solid transparent;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.tab-btn:hover {
  color: var(--white-text);
}

.tab-btn.active {
  color: var(--prof-blue);
  border-bottom-color: var(--prof-blue);
  text-shadow: 0 0 8px rgba(163, 255, 18, 0.3);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

/* Data Tables */
.data-table-wrapper {
  overflow-x: auto;
  background-color: var(--card-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 0;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-family: monospace;
  font-size: 0.85rem;
}

.data-table th, .data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.data-table th {
  background-color: rgba(255,255,255,0.03);
  color: var(--prof-blue);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background-color: rgba(163, 255, 18, 0.05);
}

/* Loader */
.spinner {
  width: 40px;
  height: 40px;
  border: 2px solid var(--border-subtle);
  border-top-color: var(--prof-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 2rem auto;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 60px;
    left: 0;
    width: 100%;
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--prof-blue);
    padding: 1rem 0;
    transform: translateY(-150%);
    transition: transform 0.3s ease;
    z-index: 100;
  }
  
  .nav-menu.nav-open {
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
  }

  .mobile-toggle {
    display: block !important;
  }
}