/* PDF Certificate Gallery Styles */
.pdf-section {
    margin-top: 50px;
    margin-bottom: 40px;
    position: relative;
    z-index: 1;
    text-align: center;
}

.pdf-section::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(240, 165, 0, 0.3), transparent);
    z-index: -1;
}

.pdf-section-title {
    color: var(--gold);
    font-size: 1.5rem;
    text-align: center;
    margin-bottom: 10px;
    position: relative;
    display: block;
    width: 100%;
    padding: 0 15px;
}

.pdf-section-title::after {
    content: '';
    position: absolute;
    width: 60%;
    height: 2px;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--gold);
    transition: width 0.3s ease, height 0.3s ease;
    margin: 0 auto;
    display: block;
}

.pdf-section-title:hover::after {
    width: 100%;
    height: 3px;
    left: 50%;
    transform: translateX(-50%);
}

.pdf-section-description {
    color: var(--off-white);
    text-align: center;
    margin: 10px auto 30px;
    max-width: 600px;
    font-size: 0.95rem;
    opacity: 0.8;
    font-style: italic;
}

.pdf-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    padding: 10px;
    perspective: 1000px;
}

.pdf-card {
    background: rgba(26, 45, 66, 0.6);
    border: 1px solid rgba(240, 165, 0, 0.2);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
    height: 200px;
    position: relative;
    overflow: hidden;
    animation: fadeIn 0.6s ease-out;
    animation-fill-mode: both;
    opacity: 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transform-style: preserve-3d;
    cursor: pointer;
}

.pdf-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background-color: var(--gold);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform 0.3s ease;
}

.pdf-card:hover::before {
    transform: scaleY(1);
}

.pdf-card:hover {
    transform: translateY(-8px) rotateX(5deg);
    box-shadow: 0 15px 30px rgba(240, 165, 0, 0.3);
    border-color: var(--gold);
    background: rgba(26, 45, 66, 0.7);
}

/* Special styling for PDF cards with card effect */
.pdf-card.card {
    background: rgba(26, 45, 66, 0.7);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(240, 165, 0, 0.2);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.pdf-card.card:hover {
    box-shadow: 0 15px 40px rgba(240, 165, 0, 0.25);
    border: 1px solid rgba(240, 165, 0, 0.4);
    transform: translateY(-8px) rotateX(5deg) scale(1.01);
    background: rgba(26, 45, 66, 0.7);
}

.pdf-card.card:hover .pdf-icon {
    text-shadow: 0 0 15px rgba(240, 165, 0, 0.9);
}

.pdf-card.card:hover .pdf-link {
    background-color: rgba(240, 165, 0, 0.2);
}

/* Add a subtle glow to the title on hover */
.pdf-card.card:hover .pdf-title {
    text-shadow: 0 0 10px rgba(240, 165, 0, 0.5);
}

.pdf-title {
    color: var(--gold);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.3;
    position: relative;
    z-index: 2;
}

.pdf-icon {
    position: absolute;
    right: 15px;
    top: 15px;
    color: var(--gold);
    font-size: 1.5rem;
    opacity: 0.7;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-shadow: 0 0 5px rgba(240, 165, 0, 0.2);
    z-index: 2;
}

.pdf-card:hover .pdf-icon {
    transform: translateY(-3px) rotate(8deg) scale(1.2);
    opacity: 1;
    text-shadow: 0 0 10px rgba(240, 165, 0, 0.8);
}

.pdf-link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    background-color: rgba(240, 165, 0, 0.1);
    padding: 10px 15px;
    border-radius: 4px;
    color: var(--off-white);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    justify-content: center;
    position: relative;
    overflow: hidden;
    z-index: 2;
    margin-bottom: 5px;
}

.pdf-link i {
    margin-right: 8px;
    font-size: 1.1rem;
    color: var(--gold);
    transition: all 0.3s ease;
}

.pdf-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background-color: var(--gold);
    transition: width 0.3s ease;
    z-index: -1;
}

.pdf-link:hover::before {
    width: 100%;
}

.pdf-link:hover {
    color: var(--navy);
    transform: translateY(-2px);
}

.pdf-link:hover i {
    color: var(--navy);
    transform: translateX(-3px);
}

/* Extra centering for section titles */
.pdf-section-wrapper {
    text-align: center;
    width: 100%;
    display: block;
    margin: 0 auto;
    padding: 0;
}

.pdf-section-wrapper h2 {
    margin-left: auto;
    margin-right: auto;
    float: none;
}

/* Media query for responsiveness */
@media (max-width: 768px) {
    .pdf-section-title {
        font-size: 1.3rem;
    }
    
    .pdf-gallery {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
        padding: 5px;
    }
    
    .pdf-card {
        height: 180px;
        padding: 15px;
    }
    
    .pdf-title {
        font-size: 1rem;
    }
    
    .pdf-icon {
        font-size: 1.3rem;
        right: 10px;
        top: 10px;
    }
    
    .pdf-link {
        padding: 8px 12px;
        font-size: 0.9rem;
    }
}

/* Additional responsive styles for smaller devices */
@media (max-width: 380px) {
    .pdf-card {
        padding: 12px;
    }
    
    .pdf-title {
        font-size: 0.95rem;
    }
    
    .pdf-link {
        padding: 6px 10px;
        font-size: 0.85rem;
    }
    
    .pdf-link i {
        font-size: 1rem;
    }
    
    .pdf-icon {
        font-size: 1.2rem;
        right: 8px;
        top: 8px;
    }
    
    .pdf-section-description {
        font-size: 0.85rem;
        margin: 10px auto 20px;
    }
    
    .page-title {
        font-size: 1.8rem;
    }
    
    .page-subtitle {
        font-size: 1rem;
    }
}

/* Extra small device optimizations */
@media (max-width: 360px) {
    .pdf-card {
        padding: 10px;
        min-height: 150px;
    }
    
    .pdf-title {
        font-size: 0.9rem;
        margin-bottom: 8px;
    }
    
    .pdf-link {
        padding: 6px 8px;
        font-size: 0.8rem;
    }
    
    .pdf-link i {
        font-size: 0.9rem;
        margin-right: 5px;
    }
    
    .pdf-icon {
        font-size: 1.1rem;
        right: 7px;
        top: 7px;
    }
    
    .pdf-section-title {
        font-size: 1.1rem;
    }
    
    .pdf-section-description {
        font-size: 0.8rem;
    }
    
    .page-title {
        font-size: 1.6rem;
        margin-top: 30px;
    }
    
    .page-subtitle {
        font-size: 0.9rem;
        margin-bottom: 30px;
    }
}

/* Back to Top Button */
.back-to-top {
    text-align: center;
    margin: 50px auto 30px;
}

.back-to-top-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: var(--navy-light);
    color: var(--gold);
    padding: 10px 20px;
    border-radius: 30px;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid rgba(240, 165, 0, 0.3);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 100;
}

.back-to-top-button i {
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.back-to-top-button:hover {
    background-color: var(--gold);
    color: var(--navy);
    transform: translateY(-5px);
}

.back-to-top-button:hover i {
    transform: translateY(-3px);
}

@media (max-width: 768px) {
    .back-to-top-button {
        bottom: 20px;
        right: 20px;
        padding: 8px 15px;
    }
    
    .back-to-top-button span {
        display: none;
    }
}

@media (max-width: 480px) {
    .back-to-top-button {
        bottom: 15px;
        right: 15px;
        padding: 8px;
        border-radius: 50%;
    }
    
    .back-to-top-button i {
        margin: 0;
    }
}

/* JavaScript will apply these classes */
.visible {
    opacity: 1;
}

.pulse-animation {
    animation: pulse 2s infinite;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
/* Animation delays for card display */
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }
.delay-6 { animation-delay: 0.6s; }
.delay-7 { animation-delay: 0.7s; }
.delay-8 { animation-delay: 0.8s; }
.delay-9 { animation-delay: 0.9s; }
.delay-10 { animation-delay: 1.0s; }
.delay-11 { animation-delay: 1.1s; }
.delay-12 { animation-delay: 1.2s; }

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

/* Customized particle animation for PDF cards */
@keyframes floatPDFParticle {
    0% { transform: translateY(0) rotate(0deg) scale(1); opacity: 0; }
    20% { opacity: 0.8; }
    80% { opacity: 0.8; }
    100% { transform: translateY(-25px) rotate(360deg) scale(0.5); opacity: 0; }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .pdf-card {
        height: 180px;
    }
}

@media (max-width: 480px) {
    .pdf-gallery {
        grid-template-columns: 1fr;
    }
    
    .pdf-card {
        height: auto;
        min-height: 160px;
    }
}

/* Gold particle styling for PDF cards */
.gold-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
    border-radius: 12px;
}

.pdf-card .gold-particle {
    position: absolute;
    background-color: rgba(240, 165, 0, 0.5);
    border-radius: 50%;
    opacity: 0;
    box-shadow: 0 0 15px rgba(240, 165, 0, 0.9);
    transition: opacity 0.5s ease;
}

/* Touch device hover effect overrides */
@media (hover: none) {
    /* Active state for touch devices instead of hover */
    .pdf-card:active {
        transform: translateY(-5px);
        box-shadow: 0 10px 25px rgba(240, 165, 0, 0.2);
        border-color: var(--gold);
    }
    
    .pdf-link:active {
        color: var(--navy);
        background-color: var(--gold);
    }
    
    .pdf-link:active i {
        color: var(--navy);
    }
    
    /* Make sure icons are visible by default */
    .pdf-icon {
        opacity: 0.9;
    }
}