/* 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;
}

.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 {
    margin-top: 2rem;
}

.exam-cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

/* ===== 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;
}

.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;
}

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

.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;
}

.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;
}

.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 {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        gap: 1rem;
    }
}

@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;
    }
    
    .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 {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .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;
    }
    
    .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(300px, 1fr));
    gap: 1.5rem;
    padding: 1rem 0;
}

@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);
}