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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.screen {
    display: none;
}

.screen.active {
    display: block;
}

.card, .container {
    background: white;
    border-radius: 10px;
    padding: 30px;
    max-width: 1200px;
    margin: 0 auto;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

button {
    background: #667eea;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    margin: 10px 5px;
}

button:hover {
    background: #5a67d8;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background: #f7f7f7;
}

.toolbar {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.toolbar input {
    flex: 1;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 5px;
    min-width: 200px;
}

.storage-info {
    margin-left: auto;
    text-align: right;
}

.storage-info progress {
    width: 100px;
    margin-left: 10px;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
}

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 30px;
    width: 90%;
    max-width: 600px;
    border-radius: 10px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-content textarea {
    width: 100%;
    margin: 10px 0;
    padding: 8px;
    font-family: monospace;
    resize: vertical;
}

.modal-content input[type="file"] {
    display: block;
    margin: 10px 0;
    padding: 10px;
}

.footer {
    text-align: center;
    color: white;
    margin-top: 20px;
    font-size: 12px;
    opacity: 0.8;
}

#progressContainer {
    margin: 15px 0;
}

#uploadProgress {
    display: block;
    width: 100%;
    height: 20px;
}

#speedInfo {
    font-size: 13px;
    color: #555;
    margin-top: 5px;
    font-family: monospace;
}

#encryptProgress {
    font-size: 12px;
    color: #666;
    margin-top: 3px;
}

#keysOutput label {
    display: block;
    margin-top: 10px;
    font-weight: bold;
}

#keysOutput textarea,
#keysOutput input[type="text"] {
    width: 100%;
    margin: 5px 0;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: monospace;
}

@media (max-width: 768px) {
    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .storage-info {
        margin-left: 0;
        text-align: left;
    }
    
    .modal-content {
        margin: 10% auto;
        padding: 20px;
        width: 95%;
    }
    
    table {
        font-size: 12px;
    }
    
    th, td {
        padding: 8px;
    }
}