* {
    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;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 40px 20px;
    color: white;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
    font-size: 1.2em;
    opacity: 0.9;
}

.tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 30px;
    border: none;
    background: rgba(255,255,255,0.2);
    color: white;
    font-size: 1em;
    cursor: pointer;
    border-radius: 25px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.tab-btn:hover {
    background: rgba(255,255,255,0.3);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: white;
    color: #667eea;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

main {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

h2 {
    color: #667eea;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 3px solid #667eea;
}

.form-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

textarea, input[type="text"], input[type="password"], input[type="number"], select {
    width: 100%;
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 14px;
    transition: border-color 0.3s ease;
    font-family: 'Consolas', 'Monaco', monospace;
}

textarea:focus, input:focus, select:focus {
    outline: none;
    border-color: #667eea;
}

textarea {
    min-height: 200px;
    resize: vertical;
}

.encryption-options {
    display: grid;
    gap: 15px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.radio-label:hover {
    background: #e9ecef;
}

.radio-label input[type="radio"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.radio-label span {
    font-weight: 600;
    color: #333;
}

.radio-label small {
    display: block;
    color: #666;
    font-size: 0.85em;
    margin-left: auto;
}

.checkbox-group {
    display: flex;
    gap: 20px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: normal;
    cursor: pointer;
}

.btn {
    padding: 15px 35px;
    border: none;
    border-radius: 10px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-right: 10px;
    margin-top: 10px;
}

.btn.primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(102,126,234,0.4);
}

.btn.secondary {
    background: #6c757d;
    color: white;
}

.btn.secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

.result-section {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 2px dashed #e0e0e0;
}

.result-section textarea {
    background: #f8f9fa;
}

#batch_results {
    margin-top: 20px;
}

.file-result {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 10px;
}

.file-result h4 {
    color: #667eea;
    margin-bottom: 10px;
}

.file-result pre {
    background: #2d3748;
    color: #68d391;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    max-height: 300px;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    z-index: 1000;
}

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 30px;
    border-radius: 15px;
    max-width: 80%;
    max-height: 80vh;
    overflow-y: auto;
}

.close {
    float: right;
    font-size: 28px;
    cursor: pointer;
    color: #999;
}

.close:hover {
    color: #333;
}

footer {
    text-align: center;
    padding: 30px;
    color: white;
    margin-top: 30px;
}

footer p {
    margin: 5px 0;
    opacity: 0.8;
}

.status {
    padding: 15px;
    border-radius: 10px;
    margin: 10px 0;
}

.status.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.status.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    header h1 {
        font-size: 1.8em;
    }
    
    main {
        padding: 20px;
    }
    
    .tabs {
        flex-direction: column;
        align-items: stretch;
    }
    
    .tab-btn {
        width: 100%;
    }
    
    .radio-label {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .radio-label small {
        margin-left: 0;
        margin-top: 5px;
    }
    
    .btn {
        width: 100%;
        margin-right: 0;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
}