/* Reset and Base Styles */
* {
    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;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* Container Styles */
.container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    width: 100%;
    text-align: center;
}

/* Header Styles */
.title {
    color: #333;
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    color: #666;
    margin-bottom: 30px;
    font-size: 1.1rem;
}

/* Control Styles */
.controls {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.input-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

label {
    color: #555;
    font-weight: 600;
    font-size: 0.9rem;
}

input[type="number"] {
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    font-size: 1rem;
    width: 100px;
    text-align: center;
    transition: all 0.3s ease;
}

input[type="number"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Character Options */
.char-options {
    display: flex;
    gap: 20px;
    margin: 20px 0;
    justify-content: center;
    flex-wrap: wrap;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: #667eea;
}

/* Button Styles */
.generate-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.generate-btn:active {
    transform: translateY(0);
}

/* Result Container */
.result-container {
    margin-top: 30px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 15px;
    border: 2px dashed #ddd;
    transition: all 0.3s ease;
}

.result-container.has-content {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.05);
}

.result-text {
    font-family: 'Courier New', monospace;
    font-size: 1.2rem;
    color: #333;
    word-break: break-all;
    line-height: 1.6;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-btn {
    background: #28a745;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    margin-top: 15px;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    background: #218838;
    transform: translateY(-1px);
}

.copy-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.stats {
    margin-top: 15px;
    color: #666;
    font-size: 0.9rem;
}

/* SEO Content Styles */
.seo-content {
    margin-top: 60px;
    padding: 40px 0;
    border-top: 2px solid rgba(255, 255, 255, 0.3);
    text-align: left;
}

.seo-content h2 {
    color: #333;
    font-size: 1.8rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.seo-content h3 {
    color: #444;
    font-size: 1.4rem;
    margin: 30px 0 15px 0;
    font-weight: 600;
}

.seo-content h4 {
    color: #555;
    font-size: 1.1rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.seo-content p {
    color: #666;
    line-height: 1.7;
    margin-bottom: 15px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.feature-item {
    background: rgba(255, 255, 255, 0.7);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.use-cases {
    color: #666;
    line-height: 1.8;
    padding-left: 20px;
}

.use-cases li {
    margin-bottom: 10px;
}

.use-cases strong {
    color: #444;
}

/* Responsive Design */
@media (max-width: 600px) {
    .title {
        font-size: 2rem;
    }
    
    .controls {
        flex-direction: column;
        gap: 20px;
    }
    
    .char-options {
        flex-direction: column;
        gap: 15px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .seo-content {
        margin-top: 40px;
    }
}