:root {
    --primary-color: #4361ee;
    --primary-dark: #3a56d4;
    --secondary-color: #3f37c9;
    --accent-color: #4895ef;
    --dark-color: #16213e;
    --light-color: #f8f9fa;
    --text-color: #e6f1ff;
    --text-secondary: #ccd6f6;
    --text-tertiary: #a8b2d1;
    --error-color: #ff3333;
    --card-bg: rgba(16, 42, 87, 0.7);
    --card-border: rgba(67, 97, 238, 0.2);
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #0a192f;
    background-image: linear-gradient(135deg, #0a192f 0%, #172a45 100%);
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    text-align: center;
    padding: 40px 0 20px;
}

.header h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.converter-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 30px;
    border: 1px solid var(--card-border);
}

.text-input {
    width: 100%;
    min-height: 150px;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    background-color: rgba(10, 25, 47, 0.5);
    color: var(--text-color);
    font-family: inherit;
    resize: vertical;
}

.text-stats {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    text-align: right;
    margin-top: 5px;
}

.text-stats.error {
    color: var(--error-color);
}

.control-group {
    margin: 20px 0;
}

.control-group label {
    display: block;
    margin-bottom: 8px;
}

.control-group select {
    width: 100%;
    padding: 10px;
    border-radius: 5px;
    background-color: rgba(10, 25, 47, 0.5);
    color: var(--text-color);
    border: 1px solid var(--card-border);
}

.convert-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px;
    border-radius: 5px;
    width: 100%;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

.convert-btn:hover {
    background-color: var(--primary-dark);
}

.audio-player {
    width: 100%;
    margin: 20px 0;
}

.download-btn {
    display: block;
    text-align: center;
    background-color: var(--accent-color);
    color: white;
    padding: 12px;
    border-radius: 5px;
    text-decoration: none;
    margin-top: 10px;
}

.toast {
    padding: 12px;
    border-radius: 5px;
    margin: 10px 0;
    background-color: var(--error-color);
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 25, 47, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    display: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.faq-section {
    margin: 40px 0;
}

.faq-item {
    margin-bottom: 15px;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 15px;
}

.faq-question {
    background: none;
    border: none;
    color: var(--text-color);
    width: 100%;
    text-align: left;
    padding: 10px 0;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    padding: 10px 0;
    display: none;
}

.faq-answer.show {
    display: block;
}

.how-to-use {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    margin: 30px 0;
}

.how-to-use h3 {
    margin-top: 0;
    color: var(--accent-color);
}

.how-to-use ol {
    padding-left: 20px;
}


/* Related Tools Section */

.related-tools-section {
    margin: 40px 0;
    padding: 30px;
    background-color: var(--card-bg);
    border-radius: 10px;
    border: 1px solid var(--card-border);
}

.related-tools-section h2 {
    color: var(--primary-color);
    margin-bottom: 25px;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.related-tools-section h2::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--accent-color);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.tool-card {
    background-color: rgba(16, 42, 87, 0.5);
    border-radius: 12px;
    padding: 25px;
    transition: all 0.3s ease;
    border: 1px solid var(--card-border);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--accent-color);
}

.tool-icon-container {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
    font-size: 1.5rem;
    color: white;
}

.tool-card h3 {
    color: var(--primary-color);
    margin-bottom: 12px;
    font-size: 1.2rem;
    font-weight: 600;
}

.tool-card p {
    color: var(--text-color);
    font-size: 0.95rem;
    margin-bottom: 20px;
    line-height: 1.5;
}

.tool-card a {
    display: inline-flex;
    align-items: center;
    background-color: var(--accent-color);
    color: white;
    padding: 10px 18px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    margin-top: auto;
}

.tool-card a:hover {
    background-color: #64ffda;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    color: var(--accent-color);
}

.tool-card a i {
    margin-left: 8px;
    font-size: 0.9rem;
    transition: transform 0.3s;
}

.tool-card a:hover i {
    transform: translateX(3px);
}


/* SEO Content Styling */

.seo-content {
    margin: 40px 0;
    padding: 30px;
    background-color: var(--card-bg);
    border-radius: 10px;
    border: 1px solid var(--card-border);
}

.seo-content h2 {
    color: var(--primary-color);
    margin-top: 2rem;
    font-size: 1.5rem;
}

.seo-content h3 {
    color: var(--accent-color);
    margin-top: 1.5rem;
    font-size: 1.3rem;
}

.seo-content p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.seo-content ul,
.seo-content ol {
    margin-left: 1.5rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.seo-content li {
    margin-bottom: 0.5rem;
}


/* Blog Section */

.blog-section {
    margin-top: 40px;
    padding: 30px;
    background-color: var(--card-bg);
    border-radius: 10px;
    border: 1px solid var(--card-border);
}

.blog-section h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
}

.blog-article {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--card-border);
}

.blog-article:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.blog-article h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.blog-article a {
    color: #64ffda;
    text-decoration: none;
    transition: color 0.3s;
}

.blog-article a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.blog-article p {
    color: var(--text-tertiary);
    font-size: 0.95rem;
    line-height: 1.5;
}