:root {
            --dark-bg: #0F0F1A;
            --primary-glow: rgba(120, 80, 255, 0.5);
            --secondary-glow: rgba(0, 220, 255, 0.5);
            --glass-bg: rgba(22, 22, 34, 0.6);
            --glass-border: rgba(255, 255, 255, 0.1);
            --text-primary: #FFFFFF;
            --text-secondary: #A0A0B0;
            --accent-gradient: linear-gradient(90deg, #8E2DE2, #4A00E0);
            --accent-hover: linear-gradient(90deg, #9d4be9, #5b1ce2);
            --success-color: #20c997;
            --error-color: #e74c3c;
        }

        *, *::before, *::after {
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', sans-serif;
            background-color: var(--dark-bg);
            color: var(--text-primary);
            margin: 0;
            overflow-x: hidden;
            min-height: 100vh;
        }

        .background-shapes {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            overflow: hidden;
        }

        .shape {
            position: absolute;
            border-radius: 50%;
            filter: blur(150px);
            opacity: 0.7;
        }

        .shape1 {
            width: 400px;
            height: 400px;
            background: var(--primary-glow);
            top: -100px;
            left: -100px;
            animation: float 20s infinite alternate;
        }

        .shape2 {
            width: 500px;
            height: 500px;
            background: var(--secondary-glow);
            bottom: -150px;
            right: -150px;
            animation: float 25s infinite alternate;
        }

        @keyframes float {
            from { transform: translateY(0px) translateX(0px) scale(1); }
            to { transform: translateY(40px) translateX(-30px) scale(1.1); }
        }

        .main-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 2rem;
            padding-top: 4rem;
            min-height: 100vh;
            justify-content: flex-start;
        }

        .hero {
            text-align: center;
            margin-bottom: 4rem;
            animation: fadeInDown 1s ease-out;
        }

        .hero h1 {
            font-size: clamp(2.5rem, 5vw, 4.5rem);
            font-weight: 900;
            margin: 0 0 1rem 0;
            letter-spacing: -2px;
            background: linear-gradient(90deg, #fff, #c0c0ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero .subtitle {
            font-size: clamp(1rem, 2vw, 1.25rem);
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        @keyframes fadeInDown {
            from { opacity: 0; transform: translateY(-20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .converter-wrapper {
            width: 100%;
            max-width: 600px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: 24px;
            padding: 2.5rem;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
            animation: fadeInUp 1s ease-out 0.3s;
            animation-fill-mode: backwards;
            margin-bottom: 4rem;
        }

        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }

        #drop-zone {
            border: 2px dashed var(--glass-border);
            border-radius: 16px;
            padding: 50px 20px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
        }

        #drop-zone:hover, #drop-zone.dragover {
            border-color: var(--primary-glow);
            background: rgba(120, 80, 255, 0.1);
            transform: scale(1.02);
        }

        #drop-zone p {
            margin: 0;
            font-size: 1.1rem;
            color: var(--text-secondary);
        }
        #drop-zone p strong {
            color: #fff;
            font-weight: 600;
        }

        #file-input { display: none; }

        #file-name {
            margin-top: 1.5rem;
            font-weight: 500;
            color: var(--text-primary);
            text-align: center;
            min-height: 1.5em;
        }

        .form-group {
            margin-top: 1.5rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.75rem;
            font-weight: 500;
            color: var(--text-secondary);
        }

        select {
            width: 100%;
            padding: 16px;
            border-radius: 12px;
            border: 1px solid var(--glass-border);
            font-size: 1rem;
            font-family: 'Inter', sans-serif;
            background-color: rgba(0,0,0,0.2);
            color: var(--text-primary);
            appearance: none;
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23a0a0b0' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
            background-repeat: no-repeat;
            background-position: right 1rem center;
            background-size: 1em;
            transition: border-color 0.3s ease;
        }
        select:focus {
            outline: none;
            border-color: var(--primary-glow);
        }

        button#convert-btn {
            width: 100%;
            padding: 18px;
            border-radius: 12px;
            border: none;
            font-size: 1.1rem;
            font-weight: 600;
            font-family: 'Inter', sans-serif;
            color: white;
            cursor: pointer;
            background: var(--accent-gradient);
            transition: all 0.3s ease;
            margin-top: 1rem;
        }

        button#convert-btn:hover:not(:disabled) {
            background: var(--accent-hover);
            box-shadow: 0 0 20px rgba(120, 80, 255, 0.5);
            transform: translateY(-3px);
        }

        button#convert-btn:disabled {
            background: #555;
            color: #888;
            cursor: not-allowed;
        }

        #result-area {
            margin-top: 2rem;
            text-align: center;
        }
        
        .alert {
            padding: 1rem 1.5rem;
            border-radius: 12px;
            margin-top: 1rem;
            font-weight: 500;
            border: 1px solid transparent;
        }

        .alert-error {
            background-color: rgba(231, 76, 60, 0.1);
            color: var(--error-color);
            border-color: var(--error-color);
        }

        .alert-success {
            background-color: rgba(32, 201, 151, 0.1);
            color: var(--success-color);
            border-color: var(--success-color);
        }

        .download-btn {
            display: inline-block;
            margin-top: 1.5rem;
            padding: 16px 32px;
            background: var(--accent-gradient);
            color: white;
            text-decoration: none;
            border-radius: 12px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .download-btn:hover {
            background: var(--accent-hover);
            box-shadow: 0 0 20px rgba(120, 80, 255, 0.5);
            transform: translateY(-3px);
        }
        
        .reset-btn {
            background: transparent;
            border: 1px solid var(--glass-border);
            color: var(--text-secondary);
            padding: 10px 20px;
            border-radius: 8px;
            cursor: pointer;
            margin-top: 1rem;
            transition: all 0.3s ease;
        }
        .reset-btn:hover {
            background: var(--glass-border);
            color: var(--text-primary);
        }

        /* Features Section */
        .features-section {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto 4rem auto;
            animation: fadeInUp 1s ease-out 0.6s;
            animation-fill-mode: backwards;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .feature-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: 16px;
            padding: 2rem;
            text-align: center;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 40px rgba(120, 80, 255, 0.2);
        }

        .feature-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
        }

        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 0 0 1rem 0;
            color: var(--text-primary);
        }

        .feature-card p {
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* Formats Section */
        .formats-section {
            width: 100%;
            max-width: 800px;
            margin: 0 auto 4rem auto;
            text-align: center;
            animation: fadeInUp 1s ease-out 0.9s;
            animation-fill-mode: backwards;
        }

        .formats-section h2 {
            font-size: 2.5rem;
            font-weight: 700;
            margin: 0 0 2rem 0;
            color: var(--text-primary);
        }

        .format-categories {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .format-category {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: 16px;
            padding: 2rem;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
        }

        .format-category h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin: 0 0 1.5rem 0;
            color: var(--text-primary);
        }

        .format-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            justify-content: center;
        }

        .format-tag {
            background: var(--accent-gradient);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 500;
            transition: transform 0.2s ease;
        }

        .format-tag:hover {
            transform: scale(1.05);
        }

        /* How to Use Section */
        .how-to-section {
            width: 100%;
            max-width: 1000px;
            margin: 0 auto 4rem auto;
            text-align: center;
            animation: fadeInUp 1s ease-out 1.2s;
            animation-fill-mode: backwards;
        }

        .how-to-section h2 {
            font-size: 2.5rem;
            font-weight: 700;
            margin: 0 0 3rem 0;
            color: var(--text-primary);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
        }

        .step {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: 16px;
            padding: 2rem;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            position: relative;
            transition: transform 0.3s ease;
        }

        .step:hover {
            transform: translateY(-5px);
        }

        .step-number {
            position: absolute;
            top: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 40px;
            background: var(--accent-gradient);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.25rem;
            color: white;
        }

        .step h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 1rem 0 1rem 0;
            color: var(--text-primary);
        }

        .step p {
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* Social Sharing Styles */
        .social-share {
            margin-top: 1rem;
            display: flex;
            gap: 0.75rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .share-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1rem;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 500;
            font-size: 0.875rem;
            transition: all 0.3s ease;
            border: 1px solid var(--glass-border);
            background: var(--glass-bg);
            color: var(--text-primary);
        }

        .share-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
        }

        .share-btn.twitter:hover {
            background: #1DA1F2;
            border-color: #1DA1F2;
        }

        .share-btn.facebook:hover {
            background: #4267B2;
            border-color: #4267B2;
        }

        .share-btn.linkedin:hover {
            background: #0077B5;
            border-color: #0077B5;
        }

        .share-btn.copy:hover {
            background: var(--success-color);
            border-color: var(--success-color);
        }

        /* Footer Styles */
        .footer {
            width: 100%;
            background: var(--glass-bg);
            border-top: 1px solid var(--glass-border);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            margin-top: 4rem;
            padding: 3rem 2rem 2rem 2rem;
            position: relative;
            z-index: 10;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-section h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 0 0 1rem 0;
            color: var(--text-primary);
        }

        .footer-section p,
        .footer-section a {
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0.5rem 0;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .footer-section a:hover {
            color: var(--text-primary);
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .footer-bottom {
            border-top: 1px solid var(--glass-border);
            padding-top: 2rem;
            text-align: center;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .footer-bottom p {
            color: var(--text-secondary);
            margin: 0;
            font-size: 0.875rem;
        }

        .footer-legal {
            display: flex;
            gap: 2rem;
            flex-wrap: wrap;
        }

        .footer-legal a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 0.875rem;
            transition: color 0.3s ease;
        }

        .footer-legal a:hover {
            color: var(--text-primary);
        }

        .brand-logo {
            font-size: 1.5rem;
            font-weight: 700;
            background: var(--accent-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 1rem;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .main-container {
                padding: 1rem;
            }

            .feature-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .format-categories {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .formats-section h2,
            .how-to-section h2 {
                font-size: 2rem;
            }

            .social-share {
                flex-direction: column;
                align-items: center;
            }

            .footer {
                padding: 2rem 1rem 1.5rem 1rem;
            }

            .footer-content {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 1rem;
            }

            .footer-legal {
                justify-content: center;
            }
        }

/* Blog Section Styles */
.blog-section {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid #ccc;
}

.blog-section h2 {
  font-size: 1.5em;
  margin-bottom: 1em;
}

.blog-links {
  list-style: none;
  padding-left: 0;
}

.blog-links li {
  margin-bottom: 0.5em;
}

.blog-links a {
  color: #007bff;
  text-decoration: none;
}

.blog-links a:hover {
  text-decoration: underline;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.header {
    text-align: center;
    margin-bottom: 4rem;
    padding-top: 2rem;
}

.header h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 900;
    margin: 0 0 1rem 0;
    background: linear-gradient(90deg, #fff, #c0c0ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.blog-post {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: transform 0.3s ease;
    cursor: pointer;
}

.blog-post:hover {
    transform: translateY(-5px);
}

.post-date {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.post-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 1rem 0;
    color: var(--text-primary);
}

.post-excerpt {
    color: var(--text-secondary);
    margin: 0 0 1.5rem 0;
    line-height: 1.6;
}

.post-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.tag {
    background: var(--accent-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.read-more {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.read-more:hover {
    color: #8E2DE2;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 2rem;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: var(--text-primary);
}

.coming-soon {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    text-align: center;
    margin-top: 2rem;
}

.coming-soon h2 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0 0 1rem 0;
    color: var(--text-primary);
}

.coming-soon p {
    color: var(--text-secondary);
    margin: 0 0 2rem 0;
    font-size: 1.1rem;
}

.newsletter-signup {
    max-width: 400px;
    margin: 0 auto;
    display: flex;
    gap: 1rem;
}

.newsletter-input {
    flex: 1;
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
}

.newsletter-btn {
    padding: 1rem 2rem;
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.newsletter-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(120, 80, 255, 0.3);
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

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

    .coming-soon {
        padding: 2rem;
    }

    .newsletter-signup {
        flex-direction: column;
    }
}