:root {
    --primary-color: #4285f4;
    --primary-dark: #3367d6;
    --secondary-color: #f8f9fa;
    --border-color: #dadce0;
    --text-color: #202124;
    --text-secondary: #5f6368;
    --success-color: #34a853;
    --warning-color: #ea4335;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f8ff;
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 800px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 30px;
    margin: 20px;
}

.header {
    text-align: center;
    margin-bottom: 30px;
}

.header h1 {
    color: var(--primary-color);
    font-size: 2.2rem;
    margin-bottom: 8px;
}

.header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 25px;
}

.input-row {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.input-field {
    flex: 1;
    min-width: 250px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
}

input[type="text"] {
    width: 100%;
    padding: 14px 16px;
    font-size: 1.1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: border 0.3s, box-shadow 0.3s;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
}

input[readonly] {
    background-color: var(--secondary-color);
    cursor: text;
}

.result-field {
    background-color: #f8f9fa;
    border: 1px solid #e8eaed;
    font-weight: 500;
}

.buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 25px;
}

.btn {
    flex: 1;
    min-width: 120px;
    padding: 14px 20px;
    font-size: 1.1rem;
    font-weight: 500;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: #f1f3f4;
    color: var(--text-color);
}

.btn-secondary:hover {
    background-color: #e8eaed;
}

.btn-warning {
    background-color: var(--warning-color);
    color: white;
}

.btn-warning:hover {
    background-color: #d23c30;
}

.footer {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 25px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}


.btn::before {
    content: "";
    display: inline-block;
    width: 20px;
    height: 20px;
    background-size: contain;
    background-repeat: no-repeat;
}

.encrypt::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="white"><path d="M18 8h-1V6c0-2.76-2.24-5-5-5S7 3.24 7 6v2H6c-1.1 0-2 .9-2 2v10c0 1.1.9 2 2 2h12c1.1 0 2-.9 2-2V10c0-1.1-.9-2-2-2zm-6 9c-1.1 0-2-.9-2-2s.9-2 2-2 2 .9 2 2-.9 2-2 2zm3.1-9H8.9V6c0-1.71 1.39-3.1 3.1-3.1 1.71 0 3.1 1.39 3.1 3.1v2z"/></svg>');
}

.decrypt::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="white"><path d="M18 8h-1V6c0-2.76-2.24-5-5-5S7 3.24 7 6v2H6c-1.1 0-2 .9-2 2v10c0 1.1.9 2 2 2h12c1.1 0 2-.9 2-2V10c0-1.1-.9-2-2-2zm-6 9c-1.1 0-2-.9-2-2s.9-2 2-2 2 .9 2 2-.9 2-2 2zm3.1-9H8.9V6c0-1.71 1.39-3.1 3.1-3.1 1.71 0 3.1 1.39 3.1 3.1v2z"/></svg>');
}

.clear::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%235f6368"><path d="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z"/></svg>');
}


@media (max-width: 600px) {
    .container {
        padding: 20px;
    }
    
    .btn {
        min-width: 100%;
    }
    
    input[type="text"] {
        font-size: 1rem;
        padding: 12px 14px;
    }
}