/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: #1a1a1a;
    color: #e0e0e0;
    line-height: 1.6;
    min-height: 100vh;
}

/* Header styles */
header {
    text-align: center;
    padding: 2rem 1rem;
    background-color: #2d2d2d;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    color: #ffffff;
    margin: 0;
}

/* Main content */
main {
    padding: 2rem 1rem;
    max-width: 800px;
    margin: 0 auto;
}

.container {
    width: 100%;
}

/* List styles */
.list {
    list-style: none;
    display: flex;
    flex-direction: column;
    background-color: #2d2d2d;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

/* Card styles */
.card {
    background-color: transparent;
    border-radius: 0;
    padding: 1.5rem;
    box-shadow: none;
    transition: all 0.3s ease;
    border-left: 4px solid #3498db;
    border-bottom: 1px solid #404040;
}

.card:hover {
    background-color: #3a3a3a;
    border-left-color: #2980b9;
}

.card:last-child {
    border-bottom: none;
}

.card h3 {
    font-size: 1.25rem;
    font-weight: 500;
    color: #ffffff;
    margin-bottom: 0.5rem;
}

.card p {
    color: #b0b0b0;
    font-size: 0.95rem;
    font-weight: 300;
}

/* Responsive design */

/* Desktop (≥1024px) */
@media (min-width: 1024px) {
    header h1 {
        font-size: 3rem;
    }
    
    main {
        padding: 3rem 2rem;
    }
    
    .card {
        padding: 2rem;
    }
    
    .card h3 {
        font-size: 1.4rem;
    }
    
    .card p {
        font-size: 1rem;
    }
}

/* Tablet (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
    header h1 {
        font-size: 2.75rem;
    }
    
    main {
        padding: 2.5rem 1.5rem;
    }
    
    .card {
        padding: 1.75rem;
    }
    
    .list {
        gap: 0;
    }
}

/* Mobile (≤767px) */
@media (max-width: 767px) {
    header {
        padding: 1.5rem 1rem;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    main {
        padding: 1.5rem 0.75rem;
    }
    
    .card {
        padding: 1.25rem;
        border-radius: 8px;
        margin: 0 0.5rem;
    }
    
    .card h3 {
        font-size: 1.1rem;
    }
    
    .card p {
        font-size: 0.9rem;
    }
    
    .list {
        gap: 0;
    }
    
    /* Full width cards on mobile */
    .card {
        margin: 0;
        border-radius: 0;
        border-left: 4px solid #3498db;
        border-top: none;
    }
    
    .card:hover {
        border-left-color: #2980b9;
    }
}

/* Extra small mobile devices */
@media (max-width: 480px) {
    header h1 {
        font-size: 1.75rem;
    }
    
    main {
        padding: 1rem 0.5rem;
    }
    
    .card {
        padding: 1rem;
    }
    
    .card h3 {
        font-size: 1rem;
    }
    
    .card p {
        font-size: 0.85rem;
    }
}