* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #1e3c72;
    background: -webkit-linear-gradient(to bottom, #2a5298, #1e3c72);
    background: linear-gradient(to bottom, #2a5298, #1e3c72);
    color: #333;
    line-height: 1.6;
    height: 100vh;
    overflow-x: hidden;
}

.container {
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: #f0f0f0;
    background: -webkit-linear-gradient(top, #ffffff 0%, #f0f0f0 50%, #e8e8e8 100%);
    background: linear-gradient(to bottom, #ffffff 0%, #f0f0f0 50%, #e8e8e8 100%);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.8), inset 0 -1px 0 rgba(0,0,0,0.2);
}

header {
    text-align: center;
    padding: 40px 40px 30px;
    background: #ffffff;
    background: -webkit-linear-gradient(top, #ffffff 0%, #f8f8f8 50%, #ededed 100%);
    background: linear-gradient(to bottom, #ffffff 0%, #f8f8f8 50%, #ededed 100%);
    border-bottom: 1px solid #ccc;
    box-shadow: 
        inset 0 1px 0 rgba(255,255,255,1),
        0 1px 3px rgba(0,0,0,0.2);
}

main {
    flex: 1;
    padding: 30px 40px;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.intro-section {
    text-align: center;
    padding: 40px;
    background: #ffffff;
    background: -webkit-linear-gradient(top, #ffffff 0%, #f9f9f9 50%, #f0f0f0 100%);
    background: linear-gradient(to bottom, #ffffff 0%, #f9f9f9 50%, #f0f0f0 100%);
    border-radius: 12px;
    border: 1px solid #d0d0d0;
    box-shadow: 
        inset 0 1px 0 rgba(255,255,255,0.9),
        inset 0 -1px 0 rgba(0,0,0,0.1),
        0 2px 6px rgba(0,0,0,0.15),
        0 1px 0 rgba(255,255,255,0.8);
}

.intro-section h2 {
    font-size: 32px;
    font-weight: bold;
    color: #333;
    margin-bottom: 15px;
    text-shadow: 
        0 1px 0 rgba(255,255,255,0.8),
        0 2px 4px rgba(0,0,0,0.2);
}

.intro-section p {
    font-size: 16px;
    color: #555;
    text-shadow: 0 1px 0 rgba(255,255,255,0.8);
    max-width: 600px;
    margin: 0 auto;
}

.about-section {
    flex: 1;
}

.text-block {
    background: #ffffff;
    background: -webkit-linear-gradient(top, #ffffff 0%, #f9f9f9 50%, #f0f0f0 100%);
    background: linear-gradient(to bottom, #ffffff 0%, #f9f9f9 50%, #f0f0f0 100%);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid #d0d0d0;
    box-shadow: 
        inset 0 1px 0 rgba(255,255,255,0.9),
        inset 0 -1px 0 rgba(0,0,0,0.1),
        0 2px 6px rgba(0,0,0,0.15),
        0 1px 0 rgba(255,255,255,0.8);
    height: 100%;
    overflow-y: auto;
}

.text-block p {
    font-size: 14px;
    color: #444;
    margin-bottom: 18px;
    text-align: justify;
    line-height: 1.7;
    text-shadow: 0 1px 0 rgba(255,255,255,0.8);
}

.text-block p:last-child {
    margin-bottom: 0;
}

footer {
    text-align: center;
    padding: 20px 40px;
    background: #e8e8e8;
    background: -webkit-linear-gradient(top, #f0f0f0 0%, #e8e8e8 50%, #d8d8d8 100%);
    background: linear-gradient(to bottom, #f0f0f0 0%, #e8e8e8 50%, #d8d8d8 100%);
    border-top: 1px solid #ccc;
    box-shadow: 
        inset 0 1px 0 rgba(255,255,255,0.6),
        inset 0 -1px 0 rgba(0,0,0,0.1);
}

footer p {
    font-size: 12px;
    color: #666;
    font-weight: bold;
    text-shadow: 0 1px 0 rgba(255,255,255,0.8);
}


.text-block::-webkit-scrollbar {
    width: 16px;
}

.text-block::-webkit-scrollbar-track {
    background: #f0f0f0;
    background: -webkit-linear-gradient(left, #e8e8e8 0%, #f0f0f0 50%, #e8e8e8 100%);
    border-radius: 8px;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.2);
}

.text-block::-webkit-scrollbar-thumb {
    background: #c0c0c0;
    background: -webkit-linear-gradient(left, #d0d0d0 0%, #c0c0c0 50%, #b0b0b0 100%);
    border-radius: 8px;
    border: 1px solid #a0a0a0;
    box-shadow: 
        inset 0 1px 0 rgba(255,255,255,0.5),
        0 1px 2px rgba(0,0,0,0.2);
}

.text-block::-webkit-scrollbar-thumb:hover {
    background: #b0b0b0;
    background: -webkit-linear-gradient(left, #c0c0c0 0%, #b0b0b0 50%, #a0a0a0 100%);
}

/* Responsive design */
@media (max-width: 768px) {
    header, main, footer {
        padding-left: 20px;
        padding-right: 20px;
    }
    
    .logo {
        font-size: 36px;
    }
    
    .intro-section {
        padding: 30px 25px;
    }
    
    .intro-section h2 {
        font-size: 26px;
    }
    
    .intro-section p {
        font-size: 14px;
    }
    
    .text-block {
        padding: 30px 25px;
    }
    
    .text-block p {
        text-align: left;
        font-size: 13px;
    }
    
    main {
        gap: 20px;
        padding: 20px;
    }
}

@media (max-width: 480px) {
    header {
        padding: 30px 15px 20px;
    }
    
    .logo {
        font-size: 32px;
    }
    
    .intro-section {
        padding: 25px 20px;
    }
    
    .intro-section h2 {
        font-size: 22px;
    }
    
    .text-block {
        padding: 25px 20px;
    }
    
    main {
        padding: 15px;
        gap: 15px;
    }
    
    footer {
        padding: 15px;
    }
}