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

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

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 90vh;
}

header {
    background: linear-gradient(135deg, #002868 0%, #004ba0 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1rem;
    opacity: 0.9;
}

.translator-container {
    flex: 1;
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.language-selectors {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.selector-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.selector-group label {
    font-weight: 600;
    color: #002868;
    font-size: 0.95rem;
}

.selector-group select {
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 1rem;
    background: white;
    cursor: pointer;
    transition: border-color 0.3s;
}

.selector-group select:focus {
    outline: none;
    border-color: #002868;
}

.text-area-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.text-area-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.text-area-header label {
    font-weight: 600;
    color: #002868;
    font-size: 0.95rem;
}

.char-counter {
    font-size: 0.85rem;
    color: #666;
}

.text-area-group textarea {
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 1rem;
    resize: vertical;
    min-height: 150px;
    transition: border-color 0.3s;
}

.text-area-group textarea:focus {
    outline: none;
    border-color: #002868;
}

.result-box {
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    min-height: 150px;
    background: #f8f9fa;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: #333;
}

.result-box.empty {
    color: #999;
    font-style: italic;
}

.button-group {
    display: flex;
    gap: 12px;
}

.translate-button {
    flex: 1;
    padding: 14px 30px;
    background: #002868;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s;
}

.translate-button:hover {
    background: #004ba0;
}

.translate-button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.clear-button {
    padding: 14px 24px;
    background: #e9ecef;
    color: #495057;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s;
}

.clear-button:hover {
    background: #dee2e6;
}

.loading {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: white;
    animation: pulse 1.5s ease-in-out infinite;
    margin-left: 8px;
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.3;
    }
    50% {
        opacity: 1;
    }
}

.error-message {
    padding: 12px;
    background: #fee;
    border: 1px solid #fcc;
    border-radius: 6px;
    color: #c33;
    font-size: 0.9rem;
    display: none;
}

.error-message.show {
    display: block;
}

footer {
    padding: 15px;
    text-align: center;
    background: #f8f9fa;
    color: #666;
    font-size: 0.9rem;
    border-top: 1px solid #e0e0e0;
}

footer p {
    margin-bottom: 8px;
}

.back-link {
    color: #BF0A30;
    text-decoration: none;
    font-size: 0.9rem;
    padding: 6px 12px;
    border-radius: 6px;
    transition: background 0.3s;
    display: inline-block;
    font-weight: 500;
}

.back-link:hover {
    background: #e9ecef;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        min-height: 95vh;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    .translator-container {
        padding: 20px;
        gap: 20px;
    }
    
    .language-selectors {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .button-group {
        flex-direction: column;
    }
}


.diagram-link {
    color: #002868;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.diagram-link:hover {
    color: #004ba0;
    text-decoration: underline;
}