body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 20px;
    min-height: 100vh;
    background: url('./bk.jpg') no-repeat center center fixed;
    background-size: cover;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 30px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

h1 {
    color: white;
    text-align: center;
    text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

textarea {
    width: calc(100% - 30px);
    height: 150px;
    margin: 10px 0;
    padding: 15px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    resize: vertical;
    background-color: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(5px);
    color: #fff;
    font-size: 16px;
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.2);
}

textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

#output {
    margin-top: 5px;
    background-color: rgba(0, 0, 0, 0.3);
}

.footer {
    margin-top: 20px;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    padding: 10px;
}

.buttons {
    display: flex;
    gap: 10px;
    margin: 10px 0;
}

button {
    flex: 1;
    padding: 12px;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s;
    font-weight: bold;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

button#encrypt {
    background: linear-gradient(135deg, #368fc2 0%, #9643bc 100%);
}

button#decrypt {
    background: linear-gradient(135deg, #368fc2 0%, #9643bc 100%);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    opacity: 0.9;
}