/* Past Papers Page Specific Styles */
.past-papers-page {
    padding-top: 80px;
    min-height: 100vh;
    background-color: var(--background-dark);
}

/* Accordion Styles */
.accordion-item {
    background: transparent;
    border: none;
    margin-bottom: 1rem;
}

.accordion-button {
    background: var(--background-card);
    color: var(--text-color);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px !important;
    padding: 1.5rem;
    font-weight: 600;
    font-size: 1.1rem;
}

.accordion-button:not(.collapsed) {
    background: var(--background-card);
    color: var(--text-color);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.accordion-button::after {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23ffffff'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}

.accordion-button:not(.collapsed)::after {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23ffffff'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}

.accordion-body {
    background: transparent;
    padding: 2rem 1rem;
}

/* Papers Grid */
.papers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* Paper Cards */
.paper-card {
    background: var(--background-card);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
}

.paper-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

/* Paper Card Content */
.paper-info {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    color: white;

}

.paper-icon {
    font-size: 1.5rem;
    color: var(--christmas-red);
    margin-right: 1rem;
}

.paper-info h3 {
    font-size: 1.2rem;
    margin: 0;
    font-weight: 600;
    color: white;
}

.paper-meta {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.paper-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.paper-actions .btn {
    flex: 1;
}

/* Animation Delays for Cards */
.paper-card:nth-child(1) { animation-delay: 0.1s; }
.paper-card:nth-child(2) { animation-delay: 0.2s; }
.paper-card:nth-child(3) { animation-delay: 0.3s; }
.paper-card:nth-child(4) { animation-delay: 0.4s; }

/* Exam Board Tabs */
.exam-board-tabs {
    margin-bottom: 2rem;
}

.nav-pills .nav-link {
    color: var(--text-color);
    background: var(--background-card);
    margin-right: 1rem;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.nav-pills .nav-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.nav-pills .nav-link.active {
    background: var(--christmas-red);
    color: white;
}

/* Hero Section */
.subject-hero {
    background: var(--background-card);
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
    margin-bottom: 2rem;
}

.subject-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(212, 36, 38, 0.1) 0%, rgba(10, 10, 12, 0.95) 100%);
    opacity: 1;
}

.subject-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    position: relative;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-pills {
        flex-direction: column;
        gap: 0.5rem;
    }

    .nav-pills .nav-link {
        margin-right: 0;
        text-align: center;
    }

    .paper-actions {
        flex-direction: column;
    }

    .subject-title {
        font-size: 2rem;
    }
    
    .subject-hero {
        padding: 2rem 0;
    }

    .accordion-button {
        padding: 1rem;
        font-size: 1rem;
    }
}