/* Exam Selection Corporate Dashboard Styles */
/* Professional dashboard with charts and data tables */

/* ===== RESET AND BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
    Cantarell, sans-serif;
  line-height: 1.6;
  color: #1f2937;
  background: #f8fafc;
  min-height: 100vh;
  font-weight: 400;
}

/* ===== PAGE CONTAINER ===== */
.page-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== HEADER SECTION ===== */
.header {
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
  padding: 1.5rem 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.logo-section {
  flex-shrink: 0;
}

.logo {
  height: 50px;
  width: auto;
}

.header-text {
  flex: 1;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 0.25rem;
  line-height: 1.2;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.available-badge {
  display: inline-block;
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.5);
    transform: scale(1.02);
  }
}

.page-subtitle {
  font-size: 0.875rem;
  color: #6b7280;
  font-weight: 500;
  text-align: left;
}

.header-right {
  flex-shrink: 0;
}

.dashboard-meta {
  display: flex;
  gap: 2rem;
}

.meta-item {
  text-align: right;
}

.meta-label {
  display: block;
  font-size: 0.75rem;
  color: #6b7280;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.meta-value {
  display: block;
  font-size: 1rem;
  color: #1f2937;
  font-weight: 600;
}

/* ===== MAIN CONTENT ===== */
.main-content {
  flex: 1;
  padding: 2rem 0;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  padding-left: 2rem;
  padding-right: 2rem;
}

/* ===== LOADING SECTION ===== */
.loading-section {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 400px;
}

.loading-spinner {
  text-align: center;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid #e5e7eb;
  border-top: 4px solid #3b82f6;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.loading-text {
  color: #6b7280;
  font-size: 1rem;
  font-weight: 500;
}

/* ===== EXAM SELECTION SECTION ===== */
.exam-selection-section {
  opacity: 0;
  animation: fadeIn 0.8s ease-in-out forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

/* ===== METRICS ROW ===== */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.metric-card {
  background: #ffffff;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  border: 1px solid #f1f5f9;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.metric-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #3b82f6, #1d4ed8);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.metric-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  border-color: #e2e8f0;
}

.metric-card:hover::before {
  opacity: 1;
}

.metric-icon {
  font-size: 1.75rem;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  border-radius: 10px;
  flex-shrink: 0;
  border: 1px solid #e2e8f0;
  transition: all 0.3s ease;
}

.metric-card:hover .metric-icon {
  transform: scale(1.05);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.metric-content {
  flex: 1;
  min-width: 0;
}

.metric-value {
  font-size: 2rem;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 0.25rem;
  line-height: 1;
  letter-spacing: -0.02em;
}

.metric-label {
  font-size: 0.75rem;
  color: #64748b;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.2;
}

/* ===== DASHBOARD GRID ===== */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.chart-card {
  background: #ffffff;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  border: 1px solid #e5e7eb;
}

.chart-header {
  margin-bottom: 1.5rem;
}

.chart-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 0.5rem;
}

.chart-subtitle {
  color: #6b7280;
  font-size: 0.875rem;
  font-weight: 500;
}

.chart-content {
  min-height: 200px;
}

/* ===== STATUS CHART ===== */
.status-chart {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: #f9fafb;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}

.status-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-indicator.ready {
  background: #10b981;
}

.status-indicator.coming-soon {
  background: #f59e0b;
}

.status-label {
  flex: 1;
  font-weight: 500;
  color: #374151;
}

.status-count {
  font-size: 0.875rem;
  font-weight: 600;
  color: #374151;
}

/* ===== CATEGORY CHART ===== */
.category-chart {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.category-item {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.25rem;
  background: #f9fafb;
  border-radius: 12px;
  border: 1px solid #e5e7eb;
  transition: all 0.3s ease;
}

.category-item:hover {
  background: #f3f4f6;
  border-color: #d1d5db;
  transform: translateX(4px);
}

.category-info {
  flex: 1;
  min-width: 0;
}

.category-label {
  font-weight: 600;
  color: #1f2937;
  font-size: 1rem;
  margin-bottom: 0.25rem;
  line-height: 1.2;
}

.category-details {
  display: flex;
  gap: 1rem;
  font-size: 0.75rem;
  color: #6b7280;
  font-weight: 500;
}

.category-exams,
.category-questions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.category-bar {
  flex: 1;
  height: 8px;
  background: #e5e7eb;
  border-radius: 4px;
  overflow: hidden;
  min-width: 120px;
  max-width: 200px;
}

.category-progress {
  height: 100%;
  background: linear-gradient(90deg, #3b82f6, #1d4ed8);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.category-value {
  font-size: 0.875rem;
  font-weight: 700;
  color: #1f2937;
  min-width: 40px;
  text-align: right;
}

/* ===== TABLE SECTION ===== */
.table-section {
  background: #ffffff;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  border: 1px solid #e5e7eb;
  margin-bottom: 3rem;
}

.table-header {
  margin-bottom: 1.5rem;
}

.table-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 0.5rem;
}

.table-subtitle {
  color: #6b7280;
  font-size: 0.875rem;
  font-weight: 500;
}

.table-container {
  overflow-x: auto;
  max-height: 400px; /* Fixed height for scrollable area */
  border-radius: 12px;
  box-shadow:
    0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  background: white;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  background: white;
}

.data-table thead {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  position: sticky;
  top: 0;
  z-index: 10;
}

.data-table th {
  padding: 1rem 1.5rem;
  text-align: left;
  font-weight: 600;
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.75rem;
  border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

.data-table tbody {
  max-height: 350px; /* Leave space for header */
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: #cbd5e1 #f1f5f9;
  position: relative;
}

/* Add subtle fade effect to indicate scrollable content */
.data-table tbody::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 20px;
  background: linear-gradient(to bottom, transparent, rgba(255, 255, 255, 0.8));
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.data-table tbody:hover::after {
  opacity: 1;
}

.data-table tbody::-webkit-scrollbar {
  width: 6px;
}

.data-table tbody::-webkit-scrollbar-track {
  background: #f1f5f9;
  border-radius: 3px;
}

.data-table tbody::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 3px;
  transition: background 0.3s ease;
}

.data-table tbody::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

.data-table td {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid #f3f4f6;
  color: #374151;
  vertical-align: middle;
}

.data-table tbody tr {
  transition: all 0.3s ease;
}

.data-table tbody tr:hover {
  background-color: #f8fafc;
  transform: translateY(-1px);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.data-table tbody tr:hover .last-updated {
  color: #1f2937;
}

/* Highlight rows with NEW badges */
.data-table tbody tr:has(.new-badge) {
  background: linear-gradient(90deg, #fef3f2 0%, #ffffff 100%);
  border-left: 3px solid #ef4444;
}

.data-table tbody tr:has(.new-badge):hover {
  background: linear-gradient(90deg, #fee2e2 0%, #f8fafc 100%);
}

.status-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-badge.ready {
  background: #d1fae5;
  color: #065f46;
}

.status-badge.coming-soon {
  background: #fef3c7;
  color: #92400e;
}

/* ===== CATEGORY BADGES ===== */
.category-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.375rem 0.75rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--category-color);
  color: white;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.category-badge:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.category-badge.category-pmp {
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
}

.category-badge.category-telecom {
  background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

.category-badge.category-datasci {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.category-badge.category-other {
  background: linear-gradient(135deg, #6b7280 0%, #4b5563 100%);
}

/* ===== LAST UPDATED TIMESTAMPS ===== */
.last-updated {
  font-size: 0.875rem;
  color: #6b7280;
  font-weight: 400;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  transition: all 0.2s ease;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  letter-spacing: 0.025em;
  animation: fadeInUp 0.3s ease-out;
}

.last-updated::before {
  content: "🕒";
  font-size: 0.875rem;
  opacity: 0.6;
  transition: opacity 0.2s ease;
}

.last-updated:hover {
  color: #374151;
}

.last-updated:hover::before {
  opacity: 0.8;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== SORT INDICATOR ===== */
.sort-indicator {
  color: #6b7280;
  font-weight: 500;
  position: relative;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sort-indicator::after {
  content: "↓";
  margin-left: 0.375rem;
  font-size: 0.75rem;
  color: #3b82f6;
  opacity: 0.6;
  transition: all 0.2s ease;
}

.sort-indicator:hover {
  color: #374151;
}

.sort-indicator:hover::after {
  opacity: 0.8;
}

/* ===== NEW BADGE ===== */
.new-badge {
  display: inline-flex;
  align-items: center;
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: white;
  font-size: 0.625rem;
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  margin-left: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: 0 2px 4px rgba(239, 68, 68, 0.25);
  animation: pulse 2s infinite;
  position: relative;
  overflow: hidden;
}

.new-badge::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  animation: shine 3s infinite;
}

@keyframes shine {
  0% {
    left: -100%;
  }
  50% {
    left: 100%;
  }
  100% {
    left: 100%;
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

/* ===== CARDS SECTION ===== */
.cards-section {
  margin-top: 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 2rem;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 0.5rem;
}

.section-description {
  font-size: 1rem;
  color: #6b7280;
  max-width: 600px;
  margin: 0 auto;
}

.exam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.exam-cards-container {
  width: 100%;
}

/* ===== EXAM CARD ===== */
.exam-card-wrapper {
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  border: 1px solid #e5e7eb;
  transition: all 0.3s ease;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.exam-card-wrapper:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border-color: #d1d5db;
}

.exam-card {
  padding: 1.5rem;
  position: relative;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.exam-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--exam-color, #3b82f6);
  border-radius: 12px 12px 0 0;
}

.exam-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.exam-subtitle {
  color: #6b7280;
  font-size: 0.875rem;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.exam-details-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 0.75rem;
  background: #f9fafb;
  border-radius: 6px;
  border: 1px solid #e5e7eb;
  flex-shrink: 0;
}

.exam-details-row span {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: #6b7280;
  font-weight: 500;
}

.exam-details-row i {
  color: #3b82f6;
  font-size: 0.875rem;
}

/* ===== START EXAM BUTTON ===== */
.start-exam-btn {
  width: 100%;
  background: #ffffff;
  color: #3b82f6;
  border: 2px solid #3b82f6;
  border-radius: 8px;
  padding: 0.875rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
  margin-top: auto;
  flex-shrink: 0;
}

.start-exam-btn:hover:not(:disabled) {
  background: #3b82f6;
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(59, 130, 246, 0.3);
}

.start-exam-btn:disabled {
  background: #f3f4f6;
  color: #9ca3af;
  border-color: #d1d5db;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ===== FOOTER ===== */
.footer {
  background: #ffffff;
  border-top: 1px solid #e5e7eb;
  padding: 1.5rem 0;
  margin-top: auto;
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  text-align: center;
}

.footer-text {
  color: #6b7280;
  font-size: 0.875rem;
}

.date-display {
  background: #f3f4f6;
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}

.current-date {
  font-size: 0.875rem;
  color: #6b7280;
  font-weight: 500;
}

/* ===== LEARNING MILESTONES ANIMATION ===== */
.learning-milestones {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 20px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 8px 32px rgba(102, 126, 234, 0.15);
  overflow: hidden;
  position: relative;
}

.learning-milestones::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  pointer-events: none;
}

.milestones-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  position: relative;
  z-index: 1;
}

.milestone-item {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 16px;
  padding: 1.5rem;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
  animation: slideInUp 0.6s ease-out;
}

.milestone-item:nth-child(1) {
  animation-delay: 0.1s;
}
.milestone-item:nth-child(2) {
  animation-delay: 0.2s;
}
.milestone-item:nth-child(3) {
  animation-delay: 0.3s;
}

.milestone-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.milestone-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: block;
}

.milestone-title {
  font-size: 1rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.milestone-content {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Progress Bar Styles */
.progress-bar {
  width: 100%;
  height: 8px;
  background: #e2e8f0;
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #3b82f6, #1d4ed8);
  border-radius: 4px;
  width: 0%;
  transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
  animation: progressFill 2s ease-out forwards;
}

.progress-text {
  font-size: 0.875rem;
  font-weight: 600;
  color: #64748b;
  text-align: center;
}

/* Progress Circle Styles */
.progress-circle {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
}

.circle-svg {
  transform: rotate(-90deg);
}

.circle-bg {
  fill: none;
  stroke: #e2e8f0;
}

.circle-fill {
  fill: none;
  stroke: #3b82f6;
  stroke-linecap: round;
  stroke-dasharray: 0 157; /* 2 * π * 25 */
  transition: stroke-dasharray 1.5s cubic-bezier(0.4, 0, 0.2, 1);
  animation: circleFill 2s ease-out forwards;
}

.circle-text {
  position: absolute;
  font-size: 1rem;
  font-weight: 700;
  color: #1e293b;
}

/* Animations */
@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes progressFill {
  to {
    width: var(--progress-width);
  }
}

@keyframes circleFill {
  to {
    stroke-dasharray: var(--progress-dash) 157;
  }
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1200px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }

  .metrics-row {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.25rem;
  }
}

@media (max-width: 1024px) {
  .header-content {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }

  .header-left {
    flex-direction: column;
    gap: 1rem;
  }

  .dashboard-meta {
    justify-content: center;
  }

  .metrics-row {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
  }

  .exam-cards-container {
    width: 100%;
  }

  .exam-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
  }

  .subject-tab-content .exam-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
}

@media (max-width: 768px) {
  .header {
    padding: 1rem 0;
  }

  .header-content {
    padding: 0 1rem;
  }

  .main-content {
    padding: 1.5rem 1rem;
  }

  .page-title {
    font-size: 1.5rem;
    flex-direction: column;
    align-items: flex-start;
  }

  .available-badge {
    font-size: 0.65rem;
    padding: 0.2rem 0.6rem;
    margin-top: 0.25rem;
  }

  .page-subtitle {
    font-size: 0.875rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

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

  .metric-card {
    padding: 1.5rem;
  }

  .metric-icon {
    width: 60px;
    height: 60px;
    font-size: 2rem;
  }

  .metric-value {
    font-size: 2rem;
  }

  .exam-cards-container {
    width: 100%;
  }

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

  .subject-tab-content .exam-grid {
    grid-template-columns: 1fr;
  }

  .exam-card {
    padding: 1rem;
  }

  .exam-details-row {
    flex-direction: column;
    gap: 0.5rem;
  }

  .chart-card {
    padding: 1.5rem;
  }

  .table-section {
    padding: 1.5rem;
  }

  .table-container {
    max-height: 300px; /* Smaller height on mobile */
  }

  .data-table {
    font-size: 0.75rem;
  }

  .data-table th,
  .data-table td {
    padding: 0.75rem 0.5rem;
  }

  .data-table tbody {
    max-height: 250px; /* Smaller scrollable area on mobile */
  }

  .category-badge {
    padding: 0.25rem 0.5rem;
    font-size: 0.625rem;
  }

  .last-updated {
    font-size: 0.75rem;
    gap: 0.25rem;
  }

  .last-updated::before {
    font-size: 0.75rem;
  }

  .new-badge {
    font-size: 0.5rem;
    padding: 0.125rem 0.25rem;
  }

  .learning-milestones {
    padding: 1.5rem;
    margin-bottom: 1.5rem;
  }

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

  .milestone-item {
    padding: 1.25rem;
  }

  .milestone-icon {
    font-size: 1.75rem;
  }

  .milestone-title {
    font-size: 1rem;
  }

  .milestone-description {
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .header-content {
    padding: 0 1rem;
  }

  .main-content {
    padding: 1rem;
  }

  .page-title {
    font-size: 1.25rem;
    flex-direction: column;
    align-items: flex-start;
  }

  .available-badge {
    font-size: 0.6rem;
    padding: 0.15rem 0.5rem;
    margin-top: 0.25rem;
  }

  .metric-card {
    padding: 1.25rem;
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }

  .metric-icon {
    width: 50px;
    height: 50px;
    font-size: 1.75rem;
  }

  .metric-value {
    font-size: 1.75rem;
  }

  .exam-card {
    padding: 1rem;
  }

  .start-exam-btn {
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
  }

  .chart-card {
    padding: 1rem;
  }

  .table-section {
    padding: 1rem;
  }

  .table-container {
    max-height: 250px; /* Even smaller height on very small screens */
  }

  .data-table tbody {
    max-height: 200px; /* Smaller scrollable area on very small screens */
  }

  .category-badge {
    padding: 0.25rem 0.375rem;
    font-size: 0.5rem;
  }

  .last-updated {
    font-size: 0.625rem;
    gap: 0.125rem;
  }

  .last-updated::before {
    font-size: 0.625rem;
  }

  .new-badge {
    font-size: 0.375rem;
    padding: 0.125rem 0.25rem;
  }
}

/* ===== UTILITY CLASSES ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== FOCUS STATES ===== */
.start-exam-btn:focus {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

/* ===== PRINT STYLES ===== */
@media print {
  .header,
  .footer,
  .start-exam-btn {
    display: none;
  }

  .main-content {
    padding: 0;
  }

  .exam-card-wrapper,
  .chart-card,
  .table-section {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #000;
  }
}

/* ===== SUBJECT TABS STYLES ===== */
.subject-tabs-container {
  width: 100%;
  margin-top: 2rem;
}

.subject-tabs-header {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  border-bottom: 2px solid #e5e7eb;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.subject-tabs-header::-webkit-scrollbar {
  display: none;
}

.subject-tab {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  background: #f9fafb;
  border: none;
  border-radius: 12px 12px 0 0;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
  font-weight: 500;
  color: #6b7280;
  position: relative;
  min-width: 200px;
}

.subject-tab:hover {
  background: #f3f4f6;
  color: #374151;
  transform: translateY(-2px);
}

.subject-tab.active {
  background: var(--subject-color, #3b82f6);
  color: white;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.subject-tab.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--subject-color, #3b82f6);
}

.subject-tab i {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.subject-tab span {
  font-size: 0.875rem;
}

.exam-count {
  background: rgba(255, 255, 255, 0.2);
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
}

.subject-tab.active .exam-count {
  background: rgba(255, 255, 255, 0.3);
}

.subject-tabs-content {
  position: relative;
}

.subject-tab-content {
  display: none;
  animation: fadeIn 0.3s ease-in-out;
}

.subject-tab-content.active {
  display: block;
}

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

/* Responsive design for subject tabs */
@media (max-width: 768px) {
  .subject-tabs-header {
    gap: 0.5rem;
    margin-bottom: 1.5rem;
  }

  .subject-tab {
    padding: 0.75rem 1rem;
    min-width: 160px;
    font-size: 0.875rem;
  }

  .subject-tab i {
    font-size: 1rem;
  }

  .exam-count {
    padding: 0.125rem 0.375rem;
    font-size: 0.625rem;
  }
}

@media (max-width: 480px) {
  .subject-tab {
    min-width: 140px;
    padding: 0.625rem 0.875rem;
    font-size: 0.75rem;
  }

  .subject-tab i {
    font-size: 0.875rem;
  }

  .exam-count {
    padding: 0.125rem 0.25rem;
    font-size: 0.5rem;
  }
}

/* Enhanced exam grid for subject tabs */
.subject-tab-content .exam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  padding: 1rem 0;
  width: 100%;
}

@media (max-width: 768px) {
  .subject-tab-content .exam-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

/* Subject-specific styling */
.subject-tab[data-subject="Project Management"] {
  --subject-color: #3b82f6;
}

.subject-tab[data-subject="Telecommunication"] {
  --subject-color: #8b5cf6;
}

.subject-tab[data-subject="Data Science"] {
  --subject-color: #10b981;
}

/* Hover effects for subject tabs */
.subject-tab:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.subject-tab.active:hover {
  transform: translateY(-1px);
}

/* Smooth transitions */
.subject-tab,
.subject-tab-content {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}