/**
 * Certificate System Styles
 * WCAG 2.2 AAA Compliant
 * Mobile Responsive Design
 * Bootstrap 5.3.7 Compatible
 */

/* ============================================================
   Certificate Gallery/Grid
   ============================================================ */

.certificates-container {
    padding: 2rem 0;
    min-height: 60vh;
}

.certificates-header {
    text-align: center;
    margin-bottom: 3rem;
}

.certificates-header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 1rem;
}

.certificates-header p {
    font-size: 1.125rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.certificate-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.stat-card {
    text-align: center;
    padding: 1.5rem;
    background: #0d47a1 !important; /* Solid dark blue for WCAG AAA compliance */
    border-radius: 12px;
    min-width: 150px;
    color: #ffffff !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border: 2px solid #1565c0;
}

.stat-card .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    display: block;
    margin-bottom: 0.5rem;
    color: #ffffff !important; /* Explicit white for maximum contrast */
}

.stat-card .stat-label {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #ffffff !important; /* Solid white, no opacity for WCAG AAA */
    font-weight: 600; /* Increased weight for better visibility */
    display: block;
}

/* Certificate Grid */
.certificate-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

@media (max-width: 768px) {
    .certificate-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* ============================================================
   Certificate Card
   ============================================================ */

.certificate-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
}

.certificate-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.certificate-card:focus-within {
    outline: 3px solid #1a73e8;
    outline-offset: 4px;
}

/* Certificate Header with Color */
.certificate-header {
    padding: 2rem;
    background: linear-gradient(135deg, var(--cert-color, #1a73e8) 0%, var(--cert-color-dark, #0d47a1) 100%);
    color: #fff;
    text-align: center;
    position: relative;
}

.certificate-card[data-type="module"] .certificate-header {
    --cert-color: #1a73e8;
    --cert-color-dark: #0d47a1;
}

.certificate-card[data-type="master"] .certificate-header {
    --cert-color: #ea4335;
    --cert-color-dark: #c5221f;
}

.certificate-badge {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}

.certificate-badge img {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

.certificate-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.certificate-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-bottom: 0;
}

/* Certificate Body */
.certificate-body {
    padding: 2rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.certificate-status {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
}

.certificate-status.earned {
    background: #1b5e20; /* Dark green for WCAG AAA */
    color: #ffffff;
    border: 2px solid #2e7d32;
}

.certificate-status.in-progress {
    background: #e65100; /* Dark orange for WCAG AAA */
    color: #ffffff;
    border: 2px solid #f57c00;
}

.certificate-status.locked {
    background: #424242; /* Dark gray for WCAG AAA */
    color: #ffffff;
    border: 2px solid #616161;
}

.certificate-description {
    color: #666;
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

/* Progress Section */
.certificate-progress {
    margin-bottom: 1.5rem;
}

.progress-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: #1a1a1a; /* Darker for better contrast */
}

.progress-percentage {
    color: #0d47a1; /* Darker blue for WCAG AAA compliance */
    font-weight: 700;
}

.progress {
    height: 10px;
    background: #e9ecef;
    border-radius: 50px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #1a73e8 0%, #4285f4 100%);
    border-radius: 50px;
    transition: width 0.6s ease;
}

.certificate-card[data-type="master"] .progress-bar {
    background: linear-gradient(90deg, #ea4335 0%, #fb8c00 100%);
}

/* Requirements List */
.requirements-list {
    margin-bottom: 1.5rem;
}

.requirement-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    background: #f8f9fa;
    border-radius: 8px;
    font-size: 0.875rem;
}

.requirement-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 0.75rem;
}

.requirement-item.met .requirement-icon {
    background: #1b5e20; /* Dark green for WCAG AAA */
    color: #ffffff;
}

.requirement-item.unmet .requirement-icon {
    background: #b71c1c; /* Dark red for WCAG AAA */
    color: #ffffff;
}

.requirement-text {
    flex-grow: 1;
    color: #333;
}

/* Certificate Details (Earned) */
.certificate-details {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
}

.detail-row:last-child {
    margin-bottom: 0;
}

.detail-label {
    color: #666;
    font-weight: 600;
}

.detail-value {
    color: #1a1a1a;
    font-weight: 500;
}

.certificate-number {
    font-family: 'Courier New', monospace;
    font-weight: 700;
    color: #0d47a1; /* Darker blue for WCAG AAA compliance */
}

/* Action Buttons */
.certificate-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: auto;
}

.btn-certificate {
    flex: 1;
    min-width: 120px;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9375rem;
    text-align: center;
    transition: all 0.2s ease;
    text-decoration: none;
    border: none;
    cursor: pointer;
}

.btn-certificate:focus {
    outline: 3px solid #1a73e8;
    outline-offset: 2px;
}

.btn-certificate-primary {
    background: #1a73e8;
    color: #fff;
}

.btn-certificate-primary:hover {
    background: #1557b0;
    color: #fff;
}

.btn-certificate-secondary {
    background: #fff;
    color: #1a73e8;
    border: 2px solid #1a73e8;
}

.btn-certificate-secondary:hover {
    background: #e8f0fe;
    color: #1557b0;
    border-color: #1557b0;
}

.btn-certificate-success {
    background: #34a853;
    color: #fff;
}

.btn-certificate-success:hover {
    background: #2d8e47;
    color: #fff;
}

.btn-certificate:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============================================================
   Certificate View/Display Page
   ============================================================ */

.certificate-view-container {
    max-width: 900px;
    margin: 3rem auto;
    padding: 2rem;
}

.certificate-display {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    padding: 3rem;
    position: relative;
    overflow: hidden;
}

.certificate-display::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(26, 115, 232, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.certificate-header-display {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    z-index: 1;
}

.certificate-logo {
    width: 120px;
    height: auto;
    margin-bottom: 1.5rem;
}

.certificate-type-label {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #666;
    margin-bottom: 1rem;
}

.certificate-display-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.certificate-subtitle-display {
    font-size: 1.25rem;
    color: #666;
}

/* Certificate Recipient */
.certificate-recipient {
    text-align: center;
    margin: 3rem 0;
    padding: 2rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 12px;
}

.recipient-label {
    font-size: 1rem;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.recipient-name {
    font-size: 2rem;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 1rem;
}

.recipient-email {
    font-size: 1rem;
    color: #666;
}

/* Certificate Metadata */
.certificate-metadata {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
    padding: 2rem;
    background: #f8f9fa;
    border-radius: 12px;
}

.metadata-item {
    text-align: center;
}

.metadata-label {
    font-size: 0.875rem;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.metadata-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: #1a1a1a;
}

/* Certificate Footer */
.certificate-footer-display {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid #e9ecef;
    text-align: center;
}

.verification-info {
    background: #e8f0fe;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.verification-label {
    font-size: 0.875rem;
    color: #666;
    margin-bottom: 0.5rem;
}

.verification-code {
    font-family: 'Courier New', monospace;
    font-size: 1.125rem;
    font-weight: 700;
    color: #0d47a1; /* Darker blue for WCAG AAA compliance */
    word-break: break-all;
}

/* Share Buttons */
.certificate-share-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.btn-share {
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
}

.btn-share-linkedin {
    background: #0077b5;
    color: #fff;
}

.btn-share-linkedin:hover {
    background: #005885;
    color: #fff;
}

.btn-share-twitter {
    background: #1da1f2;
    color: #fff;
}

.btn-share-twitter:hover {
    background: #0c85d0;
    color: #fff;
}

.btn-share-facebook {
    background: #1877f2;
    color: #fff;
}

.btn-share-facebook:hover {
    background: #0e5fc7;
    color: #fff;
}

/* ============================================================
   Verification Page
   ============================================================ */

.verification-container {
    max-width: 600px;
    margin: 3rem auto;
    padding: 2rem;
}

.verification-form {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 2rem;
}

.verification-result {
    padding: 2rem;
    border-radius: 12px;
    margin-top: 2rem;
    text-align: center;
}

.verification-result.valid {
    background: #e8f5e9;
    border: 2px solid #4caf50;
}

.verification-result.invalid {
    background: #ffebee;
    border: 2px solid #f44336;
}

.verification-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.verification-message {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

/* ============================================================
   Accessibility & Print Styles
   ============================================================ */

/* Skip Link for Certificate View */
.skip-to-certificate {
    position: absolute;
    top: -40px;
    left: 0;
    background: #1a73e8;
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-to-certificate:focus {
    top: 0;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .certificate-card {
        border: 2px solid #000;
    }
    
    .btn-certificate {
        border: 2px solid currentColor;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .certificate-card,
    .btn-certificate,
    .progress-bar {
        transition: none;
    }
}

/* Print Styles */
@media print {
    .certificate-display {
        box-shadow: none;
        padding: 1rem;
    }
    
    .certificate-actions,
    .certificate-share-buttons,
    .btn-certificate {
        display: none !important;
    }
    
    .certificate-display-title {
        color: #000;
    }
    
    body {
        background: #fff;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .certificates-container {
        background: #1a1a1a;
    }
    
    .certificate-card {
        background: #2a2a2a;
        color: #e0e0e0;
    }
    
    .certificate-display {
        background: #2a2a2a;
        color: #e0e0e0;
    }
}

/* Loading State */
.certificate-loading {
    text-align: center;
    padding: 3rem;
}

.certificate-loading::after {
    content: '';
    display: inline-block;
    width: 50px;
    height: 50px;
    border: 4px solid #e9ecef;
    border-top-color: #1a73e8;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ============================================================
   Responsive Design
   ============================================================ */

@media (max-width: 768px) {
    .certificates-container {
        padding: 1rem;
    }
    
    .certificate-display {
        padding: 1.5rem;
    }
    
    .certificate-display-title {
        font-size: 1.75rem;
    }
    
    .recipient-name {
        font-size: 1.5rem;
    }
    
    .certificate-metadata {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .certificate-actions {
        flex-direction: column;
    }
    
    .btn-certificate {
        width: 100%;
    }
}

@media (max-width: 576px) {
    .certificate-stats {
        gap: 1rem;
    }
    
    .stat-card {
        min-width: 120px;
        padding: 1rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}