/* Modern CSS with attractive design - Desktop & Mobile Responsive */
:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --primary-light: rgba(67, 97, 238, 0.1);
    --secondary: #7209b7;
    --secondary-light: rgba(114, 9, 183, 0.1);
    --accent: #f72585;
    --accent-light: rgba(247, 37, 133, 0.1);
    --success: #4cc9f0;
    --success-light: rgba(76, 201, 240, 0.1);
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --light-gray: #e9ecef;
    --border-radius: 16px;
    --border-radius-sm: 8px;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.12);
    --shadow-large: 0 25px 50px rgba(0, 0, 0, 0.15);
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
    --gradient-primary: linear-gradient(135deg, var(--primary), var(--secondary));
    --gradient-accent: linear-gradient(135deg, var(--accent), var(--secondary));
    --gradient-dark: linear-gradient(135deg, var(--dark), #000);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: #f8fafc;
    color: var(--dark);
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Enhanced Header with Glass Effect */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
    color: var(--dark);
    padding: 1.2rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 1.6rem;
    font-weight: 800;
    text-decoration: none;
    transition: var(--transition);
}

.logo-icon {
    background: var(--gradient-primary);
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: 0 6px 20px rgba(67, 97, 238, 0.3);
    transition: var(--transition);
}

/*logo img.*/
.logo img {
  height: 40px;   /* logo size */
  width: auto;
}

.logo:hover .logo-icon {
    transform: rotate(-10deg) scale(1.1);
}

.h1Logo {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    font-size: 26px;
    letter-spacing: -0.5px;
}

/* Navigation */
nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

nav a {
    color: var(--dark);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    transition: var(--transition);
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    position: relative;
    display: inline-block;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 3px;
    transition: width 0.3s ease;
}

nav a:hover::after {
    width: 80%;
}

nav a:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.auth-buttons {
    display: flex;
    gap: 12px;
}

.btn {
    padding: 12px 28px;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(67, 97, 238, 0.2);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
    box-shadow: 0 6px 20px rgba(67, 97, 238, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(67, 97, 238, 0.4);
}

.mobile-menu {
    display: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--primary);
    background: var(--primary-light);
    width: 50px;
    height: 50px;
    border-radius: 12px;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.mobile-menu:hover {
    background: var(--primary);
    color: white;
}

 /* Hero Section */
        .hero {
            text-align: center;
            padding: 4rem 0 2rem;
        }

        .hero h2 {
            font-family: 'Poppins', sans-serif;
            font-size: 2.8rem;
            font-weight: 700;
            margin-bottom: 1rem;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
        }

        .hero p {
            font-size: 1.1rem;
            color: var(--gray);
            max-width: 600px;
            margin: 0 auto 2rem;
        }

        /* Converter Card */
        .converter-card {
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            padding: 2.5rem;
            margin-bottom: 3rem;
            position: relative;
            overflow: hidden;
        }

        .converter-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: linear-gradient(to right, var(--primary), var(--secondary));
        }

        .upload-section {
            text-align: center;
            padding: 2rem;
            border: 3px dashed var(--light-gray);
            border-radius: var(--border-radius);
            transition: var(--transition);
            cursor: pointer;
            margin-bottom: 2rem;
            background: var(--light);
        }

        .upload-section:hover {
            border-color: var(--primary);
            background: rgba(67, 97, 238, 0.02);
        }

        .upload-icon {
            font-size: 4rem;
            margin-bottom: 1rem;
            color: var(--primary);
        }

        .upload-section h3 {
            font-family: 'Poppins', sans-serif;
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
            color: var(--dark);
        }

        .upload-section p {
            color: var(--gray);
            margin-bottom: 1rem;
        }

        .file-input {
            display: none;
        }

        .file-info {
            display: none;
            background: var(--light);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-top: 1rem;
        }

        .file-info.active {
            display: block;
        }

        .file-details {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1rem;
        }

        .file-icon {
            width: 50px;
            height: 50px;
            background: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
        }

        .file-name {
            font-weight: 600;
            font-size: 1.1rem;
        }

        .file-size {
            color: var(--gray);
            font-size: 0.9rem;
        }

        /* Progress Bar */
        .progress-container {
            margin: 2rem 0;
            display: none;
        }

        .progress-container.active {
            display: block;
        }

        .progress-label {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.5rem;
        }

        .progress-bar {
            height: 10px;
            background: var(--light-gray);
            border-radius: 5px;
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            width: 0%;
            transition: width 0.5s ease;
            border-radius: 5px;
        }

        /* Buttons */
        .btn {
            padding: 14px 28px;
            border: none;
            border-radius: var(--border-radius);
            font-family: 'Poppins', sans-serif;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            min-width: 180px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(67, 97, 238, 0.4);
        }

        .btn-primary:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .btn-secondary {
            background: var(--light-gray);
            color: var(--dark);
        }

        .btn-secondary:hover {
            background: #dee2e6;
        }

        .action-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            margin-top: 2rem;
            flex-wrap: wrap;
        }

        /* Status Messages */
        .status-message {
            padding: 1rem;
            border-radius: var(--border-radius);
            margin: 1.5rem 0;
            display: none;
            font-weight: 500;
        }

        .status-success {
            display: block;
            background: #d4edda;
            color: #155724;
            border-left: 4px solid #28a745;
        }

        .status-error {
            display: block;
            background: #f8d7da;
            color: #721c24;
            border-left: 4px solid #dc3545;
        }

        .status-info {
            display: block;
            background: #d1ecf1;
            color: #0c5460;
            border-left: 4px solid #17a2b8;
        }

        /* Preview Section */
        .preview-section {
            display: none;
            margin-top: 2rem;
            background: var(--light);
            border-radius: var(--border-radius);
            padding: 2rem;
        }

        .preview-section.active {
            display: block;
        }

        .preview-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1rem;
        }

        .preview-header h3 {
            font-family: 'Poppins', sans-serif;
            font-size: 1.3rem;
        }

        .preview-content {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            max-height: 400px;
            overflow-y: auto;
            font-family: 'Courier New', monospace;
            font-size: 0.95rem;
            line-height: 1.8;
            border: 1px solid var(--light-gray);
        }

        

        
        /* Footer */
        footer {
            background: var(--dark);
            color: white;
            padding: 3rem 0 1rem;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-column h3 {
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-column h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 40px;
            height: 3px;
            background: var(--primary);
        }

        .footer-column ul {
            list-style: none;
        }

        .footer-column ul li {
            margin-bottom: 0.8rem;
        }

        .footer-column a {
            color: #adb5bd;
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-column a:hover {
            color: white;
            padding-left: 5px;
        }

        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #495057;
            color: #adb5bd;
            font-size: 0.9rem;
        }

        /* Dark Mode Toggle */
        .dark-mode-toggle {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background: var(--primary);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: var(--shadow);
            z-index: 100;
            transition: var(--transition);
        }

        .dark-mode-toggle:hover {
            transform: scale(1.1);
        }

        /* Dark Mode Styles */
        body.dark-mode {
            background-color: #121212;
            color: #e0e0e0;
        }

        body.dark-mode .tool-card,
        body.dark-mode .category-card,
        body.dark-mode .features,
        body.dark-mode .tabs-container {
            background: #1e1e1e;
            color: #e0e0e0;
        }

        body.dark-mode .tool-card h3,
        body.dark-mode .category-card h3,
        body.dark-mode .feature-item h3 {
            color: #e0e0e0;
        }

        body.dark-mode .tool-card p,
        body.dark-mode .category-card p,
        body.dark-mode .feature-item p {
            color: #b0b0b0;
        }

        body.dark-mode .search-box input {
            background: #2d2d2d;
            border-color: #3d3d3d;
            color: #e0e0e0;
        }

        body.dark-mode footer {
            background: #1a1a1a;
        }

        body.dark-mode .tabs {
            border-bottom-color: #3d3d3d;
        }

        body.dark-mode .tab:hover {
            background-color: #2d2d2d;
        }

        @media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        
    }

    .header {
        margin: 2px;
    }

     /*logo img.*/
.logo img {
  height: 40px;   /* logo size */
  justify-content: flex-start;
  width: auto;
}
    
    nav ul {
        flex-direction: column;
        text-align: center;
        gap: 0.8rem;
        width: 100%;
        display: none;
    }
    
    .nav-menu.active {
        display: flex;
        animation: slideDown 0.3s ease;
    }
    
    @keyframes slideDown {
        from { opacity: 0; transform: translateY(-20px); }
        to { opacity: 1; transform: translateY(0); }
    }
    
    .mobile-menu {
        display: flex;
        position: absolute;
        top: 1.2rem;
        right: 20px;
    }
    
    .auth-buttons {
        display: none;
    }
    .btn {
        justify-content: center;
    }
    
    .hero {
        padding: 1rem 0;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    .hero h2 {
            font-family: 'Poppins', sans-serif;
            font-size: 2.8rem;
            font-weight: 700;
            margin-bottom: 1rem;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
    }
    .hero p {
        font-size: 1.1rem;
        padding: 0 10px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .search-box {
        margin: 0 10px;
    }
    
    .search-box button {
        position: relative;
        top: auto;
        right: auto;
        transform: none;
        width: 100%;
        margin-top: 15px;
        justify-content: center;
    }
    
    .search-box input {
        padding: 18px 20px;
    }
    
    .social-icons {
        display: flex;
        gap: 18px;
        margin-top: 10px;
        justify-content: flex-start;
    }
    .social-icon {
        font-size: 2rem;
        color: #adb5bd;
        transition: transform 0.3s, color 0.3s;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        width: 40px;
        height: 40px;
        background: transparent;
    }
    .social-icon:hover {
        transform: scale(1.25) rotate(-12deg);
        color: var(--primary);
        background: rgba(67, 97, 238, 0.15);
    }
    .social-icon.facebook:hover { color: #3b5998; }
    .social-icon.instagram:hover { color: #e4405f; }
    .social-icon.linkedin:hover { color: #0e76a8; }
    .social-icon.twitter:hover { color: #1da1f2; }
    .social-icon.youtube:hover { color: #ff0000; }
        }