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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

p {
    text-align: center;
    color: #7f8c8d;
    margin-bottom: 2rem;
}

.tabs {
    display: flex;
    margin-bottom: 2rem;
    border-bottom: 2px solid #ecf0f1;
}

.tab-button {
    flex: 1;
    padding: 1rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    color: #7f8c8d;
    transition: all 0.3s;
}

.tab-button.active {
    color: #3498db;
    border-bottom: 2px solid #3498db;
}

.tab-button:hover {
    background-color: #f8f9fa;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

h2 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #2c3e50;
}

input, select, textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: #3498db;
}

textarea {
    resize: vertical;
    min-height: 100px;
}

.btn {
    background-color: #3498db;
    color: white;
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #2980b9;
}

.btn:disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
}

.btn-copy {
    background-color: #27ae60;
    color: white;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    margin-top: 0.5rem;
    transition: background-color 0.3s;
}

.btn-copy:hover {
    background-color: #229954;
}

.result-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid #ecf0f1;
}

.error {
    background-color: #e74c3c;
    color: white;
    padding: 1rem;
    border-radius: 4px;
    margin-top: 1rem;
    text-align: center;
}

.loading {
    background-color: #f39c12;
    color: white;
    padding: 1rem;
    border-radius: 4px;
    margin-top: 1rem;
    text-align: center;
}

.hidden {
    display: none;
}

.success {
    background-color: #27ae60;
    color: white;
    padding: 1rem;
    border-radius: 4px;
    margin-top: 1rem;
    text-align: center;
}

.info {
    background-color: #3498db;
    color: white;
    padding: 1rem;
    border-radius: 4px;
    margin-top: 1rem;
    text-align: center;
}

/* Security-focused styles */
input[type="password"], textarea {
    font-family: monospace; /* Consistent character spacing for security */
}

/* Disable text selection on sensitive result areas when not needed */
.result-section textarea:not(:focus) {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* Visual indicator for auto-clearing fields */
.auto-clear-warning {
    font-size: 0.8rem;
    color: #e74c3c;
    margin-top: 0.25rem;
}

/* Security notice styling */
.security-notice {
    background-color: #f8f9fa;
    border-left: 4px solid #e74c3c;
    padding: 1rem;
    margin: 1rem 0;
    font-size: 0.9rem;
    color: #2c3e50;
}

@media (max-width: 768px) {
    .container {
        margin: 1rem;
        padding: 1rem;
    }
    
    .tabs {
        flex-direction: column;
    }
    
    .tab-button {
        border-bottom: 1px solid #ecf0f1;
    }
    
    .tab-button.active {
        border-bottom: 1px solid #3498db;
        background-color: #f8f9fa;
    }
}