body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f0f8;
    color: #333;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: "Shadow Cipher";
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-30deg);
    font-size: 120px;
    color: rgba(142, 68, 173, 0.05);
    white-space: nowrap;
    pointer-events: none;
    z-index: 0;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 10px;
}

header {
    background: linear-gradient(45deg, #8e44ad, #9b59b6);
    padding: 30px 20px;
    text-align: center;
    color: white;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

h1 {
    margin: 0;
    font-size: 3em;
    font-weight: 600;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
}

h2 {
    color: #8e44ad;
}

main {
    padding: 20px;
}

#file-explorer {
    background-color: rgba(255, 255, 255, 0.95);
    border: none;
    border-radius: 15px;
    padding: 30px;
    max-width: 800px;
    margin: 20px auto;
    box-shadow: 0 10px 30px rgba(142, 68, 173, 0.1);
    transition: all 0.3s ease-in-out;
    position: relative;
    z-index: 1;
    backdrop-filter: blur(10px);
}

#file-explorer:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(142, 68, 173, 0.2);
}

ul {
    list-style-type: none;
    padding: 0;
}

li {
    padding: 15px 20px;
    border-bottom: 1px solid rgba(142, 68, 173, 0.1);
    transition: all 0.3s ease;
    border-radius: 8px;
    margin: 5px 0;
    position: relative;
}

li::before {
    content: "📁";
    margin-right: 10px;
    font-size: 1.2em;
    opacity: 0.7;
}

li:has(a[href$=".pdf"])::before {
    content: "📄";
}

li:last-child {
    border-bottom: none;
}

li:hover {
    background-color: rgba(142, 68, 173, 0.05);
    transform: translateX(10px);
    padding-left: 25px;
}

a {
    color: #8e44ad;
    text-decoration: none;
    font-size: 1.2em;
    font-weight: 500;
    transition: color 0.2s;
}

a:hover {
    color: #9b59b6;
    text-decoration: none;
}

footer {
    text-align: center;
    padding: 20px;
    position: fixed;
    bottom: 0;
    width: 100%;
    background: linear-gradient(45deg, #8e44ad, #9b59b6);
    color: white;
    font-size: 0.9em;
}