/* Keyword Difficulty Checker - Professional Styling */
.keyword-difficulty-checker {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    max-width: 600px;
    margin: 0 auto;
    padding: 0;
}

.kdc-container {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

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

.kdc-header h3 {
    font-size: 28px;
    font-weight: 700;
    margin: 0 0 10px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.kdc-header p {
    font-size: 16px;
    opacity: 0.9;
    margin: 0;
    font-weight: 300;
}

.kdc-input-section {
    margin-bottom: 25px;
}

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

.kdc-input {
    flex: 1;
    min-width: 250px;
    padding: 15px 20px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.kdc-input:focus {
    outline: none;
    border-color: #4CAF50;
    background: white;
    box-shadow: 0 12px 30px rgba(76, 175, 80, 0.2);
    transform: translateY(-2px);
}

.kdc-input::placeholder {
    color: #999;
}

.kdc-button {
    padding: 15px 25px;
    background: linear-gradient(135deg, #4CAF50, #45a049);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(76, 175, 80, 0.3);
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.kdc-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(76, 175, 80, 0.4);
    background: linear-gradient(135deg, #45a049, #4CAF50);
}

.kdc-button:active {
    transform: translateY(0);
}

.kdc-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.kdc-results {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    margin-top: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: slideDown 0.5s ease;
}

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

.results-header {
    text-align: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f0f0f0;
}

.results-header h4 {
    color: #333;
    margin: 0;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid #f5f5f5;
}

.result-item:last-child {
    border-bottom: none;
}

.result-label {
    font-weight: 600;
    color: #555;
    font-size: 15px;
}

.result-value {
    font-weight: 500;
    color: #333;
}

.score-value {
    font-size: 18px;
    font-weight: 700;
}

.level-badge {
    padding: 6px 15px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.level-easy {
    background: linear-gradient(135deg, #4CAF50, #8BC34A);
    color: white;
}

.level-medium {
    background: linear-gradient(135deg, #FF9800, #FFC107);
    color: white;
}

.level-hard {
    background: linear-gradient(135deg, #F44336, #E91E63);
    color: white;
}

.progress-section {
    margin: 25px 0;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: #f0f0f0;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 8px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.progress-fill {
    height: 100%;
    border-radius: 10px;
    transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.progress-labels {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: #666;
    font-weight: 500;
}

.insights-section {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 20px;
    border-radius: 12px;
    margin-top: 20px;
    border-left: 4px solid #4CAF50;
}

.insights-section h5 {
    margin: 0 0 10px 0;
    color: #333;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
}

.insights-text {
    margin: 0;
    color: #555;
    line-height: 1.5;
    font-size: 14px;
}

.kdc-footer {
    margin-top: 20px;
    text-align: center;
}

.info-note {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.2);
    padding: 10px 20px;
    border-radius: 25px;
    color: white;
    font-size: 14px;
    backdrop-filter: blur(10px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .kdc-container {
        padding: 20px;
        margin: 10px;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .kdc-input {
        min-width: 100%;
    }
    
    .kdc-button {
        width: 100%;
        justify-content: center;
    }
    
    .result-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
    
    .kdc-header h3 {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .kdc-container {
        padding: 15px;
    }
    
    .kdc-header h3 {
        font-size: 20px;
    }
    
    .kdc-results {
        padding: 20px;
    }
}

/* Loading Animation */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #4CAF50;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}