body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f7f9fc;
    margin: 0;
    padding: 0;
    color: #333;
}

.container {
    max-width: 880px;
    margin: 50px auto;
    background: #fff;
    border-radius: 12px;
    padding: 36px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid #eaeaea;
}

h2 {
    margin-top: 0;
    color: #2c3e50;
    font-weight: 600;
    font-size: 28px;
    letter-spacing: -0.5px;
}

.desc {
    color: #667ea7;
    margin-bottom: 28px;
    line-height: 1.6;
    font-size: 15px;
}

.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.file {
    border: 1px solid #e1e5eb;
    padding: 18px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all 0.2s ease;
    background: #fafafa;
}

.file:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    border-color: #d0e0ff;
}

.icon {
    font-size: 28px;
    color: #1976d2;
}

.meta {
    flex: 1;
    word-break: break-all;
}

.filename {
    font-weight: 600;
    color: #2c3e50;
    font-size: 16px;
    margin-bottom: 4px;
}

.type {
    font-size: 13px;
    color: #7f8c8d;
    margin-bottom: 5px;
}

.actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

.btn {
    background: #1976d2;
    color: #fff;
    padding: 9px 14px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: background 0.2s ease;
    border: none;
    cursor: pointer;
    white-space: nowrap;
}

.btn:hover {
    background: #1565c0;
}

.footer {
    margin-top: 36px;
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.footer a {
    color: #1976d2;
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: color 0.2s ease;
}

.footer a:hover {
    color: #0d47a1;
    text-decoration: underline;
}

@media (max-width: 600px) {
    .container {
        margin: 24px 16px;
        padding: 24px;
    }

    h2 {
        font-size: 24px;
    }

    .file-grid {
        grid-template-columns: 1fr;
    }

    .file {
        padding: 16px;
        gap: 12px;
    }

    .btn {
        padding: 8px 12px;
        font-size: 12px;
    }
}