/* Materials page specific styles */

.materials-page {
    padding: 80px 20px 40px;
    background-color: #000000;
    color: white;
    /* max-width: 1200px; */
    margin: 0 auto;
}

.materials-section h1 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 25px;
}

.materials-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
    line-height: 1.8;
    font-size: 1.1rem;
}

.materials-container {
    margin: 40px auto;
    max-width: 900px;
}

.materials-container p{
    text-align: center;
}

.materials-container h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
    color: #fff;
}

.material-group {
    margin-bottom: 20px;
    border: 1px solid rgba(50, 50, 50, 0.5);
    border-radius: 8px;
    overflow: hidden;
    background-color: rgba(30, 30, 30, 0.5);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.material-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    cursor: pointer;
    background: linear-gradient(135deg, rgba(40, 40, 40, 0.95) 0%, rgba(20, 20, 20, 0.95) 100%);
    transition: all 0.3s ease;
    border-left: 4px solid #333;
    position: relative;
    overflow: hidden;
}

.material-header:before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(50, 50, 50, 0.1) 0%, rgba(0, 0, 0, 0) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.material-header:hover {
    background: linear-gradient(135deg, rgba(50, 50, 50, 0.95) 0%, rgba(30, 30, 30, 0.95) 100%);
    border-left-color: #555;
    box-shadow: inset 0 0 10px rgba(255, 255, 255, 0.05);
}

.material-header:hover:before {
    opacity: 1;
}

.material-header.active {
    background: linear-gradient(135deg, rgba(60, 60, 60, 0.95) 0%, rgba(40, 40, 40, 0.95) 100%);
    border-left-color: #777;
    box-shadow: inset 0 0 15px rgba(255, 255, 255, 0.1);
    animation: subtle-glow 3s infinite;
}

.material-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: #eee;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
    position: relative;
    z-index: 1;
}

.material-header i {
    font-size: 1.2rem;
    transition: transform 0.3s ease, color 0.3s ease;
    color: #777;
    position: relative;
    z-index: 1;
}

.material-header:hover i {
    color: #aaa;
    transform: translateY(2px);
}

.material-header.active i {
    color: #ccc;
}

.material-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    background-color: rgba(15, 15, 15, 0.7);
    box-shadow: inset 0 5px 10px rgba(0, 0, 0, 0.2);
}

.material-content ul {
    list-style-type: none;
    padding: 20px;
    margin: 0;
}

.material-content ul li {
    margin-bottom: 15px;
    padding-left: 25px;
    position: relative;
}

.material-content ul li:last-child {
    margin-bottom: 0;
}

.material-content ul li:before {
    content: '\f0da';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: #777; /* Changed from #990000 to match the new black theme */
}

.material-content ul li a {
    color: #ffffff;
    text-decoration: none;
    transition: color 0.3s ease;
    padding: 3px 5px;
}

.material-content ul li a:hover {
    color: #990000;
    text-decoration: underline;
}

.additional-materials {
    margin-top: 60px;
}

/* Add some subtle animation for the headers */
@keyframes subtle-glow {
    0% { box-shadow: inset 0 0 5px rgba(255, 255, 255, 0.05); }
    50% { box-shadow: inset 0 0 10px rgba(255, 255, 255, 0.1); }
    100% { box-shadow: inset 0 0 5px rgba(255, 255, 255, 0.05); }
}

/* Responsive adjustments */
@media screen and (max-width: 768px) {
    .materials-page {
        padding: 60px 15px 30px;
    }
    
    .materials-section h1 {
        font-size: 2rem;
    }
    
    .material-header h3 {
        font-size: 1.1rem;
    }
}

@media screen and (max-width: 480px) {
    .materials-page {
        padding: 50px 10px 20px;
    }
    
    .materials-section h1 {
        font-size: 1.8rem;
    }
    
    .materials-container h2 {
        font-size: 1.5rem;
    }
    
    .material-header {
        padding: 12px 15px;
    }
    
    .material-header h3 {
        font-size: 1rem;
    }
    
    .material-content ul {
        padding: 15px;
    }
    
    .material-content ul li {
        padding-left: 20px;
    }
}