/* CSS Variables for theming */
        :root {
            /* Light theme (default) */
            --bg-primary: #2acf741f;
            --bg-secondary: #f8f9fa;
            --bg-accent: #e9ecef;
            --text-primary: #5aa7f5;
            --text-secondary: #495057;
            --text-muted: #6c757d;
            --accent-primary: #4361ee;
            --accent-secondary: #3a0ca3;
            --border-color: #dee2e6;
            --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
            
            /* Font sizes with fluid typography */
            --fs-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
            --fs-sm: clamp(0.875rem, 0.825rem + 0.25vw, 1rem);
            --fs-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
            --fs-lg: clamp(1.125rem, 1.05rem + 0.375vw, 1.25rem);
            --fs-xl: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
            --fs-2xl: clamp(1.5rem, 1.35rem + 0.75vw, 2rem);
            --fs-3xl: clamp(2rem, 1.7rem + 1.5vw, 2.5rem);
            
            /* Spacing */
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 1.5rem;
            --spacing-lg: 2rem;
            --spacing-xl: 3rem;
            --spacing-2xl: 4rem;
            
            /* Border radius */
            --radius-sm: 0.25rem;
            --radius-md: 0.375rem;
            --radius-lg: 0.5rem;
            
            /* Transitions */
            --transition-base: all 0.2s ease;
            --transition-smooth: all 0.3s ease;
            
            /* Z-index layers */
            --z-dropdown: 1000;
            --z-sticky: 1020;
            --z-modal: 1030;
            --z-tooltip: 1040;
        }

        /* Dark theme */
        [data-theme="dark"] {
            --bg-primary: #121212;
            --bg-secondary: #1e1e1e;
            --bg-accent: #2d2d2d;
            --text-primary: #f8f9fa;
            --text-secondary: #e9ecef;
            --text-muted: #adb5bd;
            --accent-primary: #4cc9f0;
            --accent-secondary: #4c6179;
            --border-color: #343a40;
            --shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.5);
        }

        /* Base styles */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }
            l
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
            font-size: var(--fs-base);
            line-height: 1.6;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            transition: var(--transition-base);
        }

        /* Typography */
        h1, h2, h3, h4, h5, h6 {
            margin-bottom: var(--spacing-sm);
            line-height: 1.2;
            font-weight: 700;
        }

        h1 {
            font-size: var(--fs-3xl);
        }

        h2 {
            font-size: var(--fs-2xl);
        }

        h3 {
            font-size: var(--fs-xl);
        }

        h4 {
            font-size: var(--fs-lg);
        }

        p {
            margin-bottom: var(--spacing-sm);
        }

        a {
            color: var(--accent-primary);
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover, a:focus {
            color: var(--accent-secondary);
        }

        /* Layout components */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }

        .section {
            padding: var(--spacing-2xl) 0;
        }

        .section__title {
            text-align: center;
            margin-bottom: var(--spacing-xl);
        }

        .section__subtitle {
            text-align: center;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto var(--spacing-xl);
        }

        /* Header styles */
        .header {
            position: sticky;
            top: 0;
            z-index: var(--z-sticky);
            background-color: var(--bg-primary);
            box-shadow: var(--shadow);
            padding: var(--spacing-sm) 0;
        }

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

        .logo {
            display: flex;
            align-items: center;
            font-weight: 700;
            font-size: var(--fs-xl);
        }

        .logo__brand {
            color: var(--text-primary);
        }

        .logo__tools {
            color: var(--accent-primary);
        }

        /* Navigation */
        .nav {
            display: flex;
            align-items: center;
        }

        .nav__list {
            display: flex;
            list-style: none;
            gap: var(--spacing-md);
        }

        .nav__item {
            position: relative;
        }

        .nav__link {
            color: var(--text-primary);
            font-weight: 500;
            padding: var(--spacing-xs) 0;
            position: relative;
        }

        .nav__link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-primary);
            transition: var(--transition-base);
        }

        .nav__link:hover::after,
        .nav__link:focus::after {
            width: 100%;
        }

        .nav__link--dropdown {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }

        /* Dropdown/Mega menu */
        .mega-menu {
            position: absolute;
            top: 100%;
            left: 0;
            width: 100vw;
            max-width: 1200px;
            background-color: var(--bg-primary);
            box-shadow: var(--shadow);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: var(--transition-smooth);
            z-index: var(--z-dropdown);
        }

        .nav__item:hover .mega-menu,
        .nav__item:focus-within .mega-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .mega-menu__grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }

        .mega-menu__category {
            margin-bottom: var(--spacing-sm);
        }

        .mega-menu__list {
            list-style: none;
        }

        .mega-menu__item {
            margin-bottom: var(--spacing-xs);
        }

        .mega-menu__link {
            color: var(--text-secondary);
            font-size: var(--fs-sm);
            display: block;
            padding: var(--spacing-xs) 0;
        }

        .mega-menu__link:hover,
        .mega-menu__link:focus {
            color: var(--accent-primary);
        }

        /* Theme toggle */
        .theme-toggle {
            background: none;
            border: none;
            cursor: pointer;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            background-color: var(--bg-accent);
            margin-left: var(--spacing-sm);
            transition: var(--transition-base);
        }

        .theme-toggle:hover,
        .theme-toggle:focus {
            background-color: var(--accent-primary);
            color: var(--bg-primary);
            outline: none;
        }

        /* Mobile menu button (hidden by default) */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: var(--radius-sm);
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 0.25rem;
            padding: 0.5rem;
            color: var(--text-primary);
            background-color: var(--bg-accent);
        }

        .menu-toggle__line {
            width: 1.5rem;
            height: 2px;
            background-color: currentColor;
            transition: var(--transition-base);
        }

        .menu-toggle[aria-expanded="true"] .menu-toggle__line:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }

        .menu-toggle[aria-expanded="true"] .menu-toggle__line:nth-child(2) {
            opacity: 0;
        }

        .menu-toggle[aria-expanded="true"] .menu-toggle__line:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }

        /* Hero section */
        .hero {
            background-color: var(--bg-secondary);
            position: relative;
            overflow: hidden;
            padding: var(--spacing-2xl) 0;
        }

        .hero__container {
            position: relative;
            z-index: 2;
        }

        .hero__content {
            max-width: 600px;
            margin: 0 auto;
            text-align: center;
            padding: var(--spacing-xl) 0;
        }

        .hero__title {
            margin-bottom: var(--spacing-md);
        }

        .hero__subtitle {
            color: var(--text-muted);
            margin-bottom: var(--spacing-lg);
            font-size: var(--fs-lg);
        }

        .hero__cta {
            display: flex;
            gap: var(--spacing-sm);
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.5rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            transition: var(--transition-base);
            border: none;
            cursor: pointer;
            font-size: var(--fs-base);
        }

        .btn--primary {
            background-color: var(--accent-primary);
            color: white;
        }

        .btn--primary:hover,
        .btn--primary:focus {
            background-color: var(--accent-secondary);
            color: white;
            outline: none;
        }

        .btn--secondary {
            background-color: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
        }

        .btn--secondary:hover,
        .btn--secondary:focus {
            background-color: var(--bg-accent);
            outline: none;
        }

        /* Tools showcase */
        .tools-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: var(--spacing-md);
        }

        .tool-card {
            background-color: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            height: 100%;
        }

        .tool-card:hover,
        .tool-card:focus-within {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        @media (prefers-reduced-motion: reduce) {
            .tool-card:hover,
            .tool-card:focus-within {
                transform: none;
            }
        }

        .tool-card__icon {
            width: 48px;
            height: 48px;
            margin-bottom: var(--spacing-sm);
            color: var(--accent-primary);
        }

        .tool-card__title {
            font-size: var(--fs-base);
            margin-bottom: var(--spacing-xs);
            color: var(--text-primary);
        }
        p {

            color: #31aacf;
            font-weight: 400;
            line-height: 1.7;
            font-size: 0.95rem;
        }

        .tool-card__link {
            display: block;
            color: inherit;
            margin-top: auto;
            padding-top: var(--spacing-sm);
        }

        .tool-card__link::after {
            content: "→";
            margin-left: 0.25rem;
            transition: var(--transition-base);
        }

        .tool-card:hover .tool-card__link::after {
            transform: translateX(4px);
        }

        /* Features section */
        .features {
            background-color: var(--bg-secondary);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }

        .feature-card {
            background-color: var(--bg-primary);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow);
            transition: var(--transition-base);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        @media (prefers-reduced-motion: reduce) {
            .feature-card:hover {
                transform: none;
            }
        }

        .feature-card__icon {
            width: 40px;
            height: 40px;
            color: var(--accent-primary);
            margin-bottom: var(--spacing-sm);
        }

        .feature-card__title {
            font-size: var(--fs-lg);
            margin-bottom: var(--spacing-xs);
        }

        .feature-card__description {
            color: var(--text-muted);
            font-size: var(--fs-sm);
        }

        /* FAQ section */
        .faq__container {
            max-width: 800px;
            margin: 0 auto;
        }

        .accordion {
            list-style: none;
        }

        .accordion__item {
            border-bottom: 1px solid var(--border-color);
        }

        .accordion__header {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-align: left;
            padding: var(--spacing-md) 0;
            background: none;
            border: none;
            cursor: pointer;
            font-size: var(--fs-base);
            font-weight: 500;
            color: var(--text-primary);
        }

        .accordion__header::after {
            content: "▼";
            font-size: var(--fs-sm);
            transition: var(--transition-base);
        }

        .accordion__item[open] .accordion__header::after {
            transform: rotate(180deg);
        }

        .accordion__content {
            padding-bottom: var(--spacing-md);
            color: var(--text-secondary);
        }

        /* Footer */
        .footer {
            background-color: var(--bg-secondary);
            padding: var(--spacing-2xl) 0 var(--spacing-md);
        }

        .footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-xl);
        }

        .footer__brand {
            margin-bottom: var(--spacing-sm);
        }

        .footer__description {
            color: var(--text-muted);
            font-size: var(--fs-sm);
            margin-bottom: var(--spacing-md);
        }

        .footer__title {
            font-size: var(--fs-lg);
            margin-bottom: var(--spacing-sm);
        }

        .footer__list {
            list-style: none;
        }

        .footer__item {
            margin-bottom: var(--spacing-xs);
        }

        .footer__link {
            color: var(--text-muted);
            font-size: var(--fs-sm);
        }

        .footer__link:hover,
        .footer__link:focus {
            color: var(--accent-primary);
        }

        .footer__social {
            display: flex;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-sm);
        }

        .footer__social-link {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 2rem;
            height: 2rem;
            border-radius: 50%;
            background-color: var(--bg-accent);
            color: var(--text-primary);
            transition: var(--transition-base);
        }

        .footer__social-link:hover,
        .footer__social-link:focus {
            background-color: var(--accent-primary);
            color: white;
        }

        .footer__bottom {
            border-top: 1px solid var(--border-color);
            padding-top: var(--spacing-md);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
        }

        .footer__copyright {
            color: var(--text-muted);
            font-size: var(--fs-sm);
        }

        /* Back to top button */
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 3rem;
            height: 3rem;
            border-radius: 50%;
            background-color: var(--accent-primary);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition-base);
            z-index: var(--z-tooltip);
        }

        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }

        .back-to-top:hover,
        .back-to-top:focus {
            background-color: var(--accent-secondary);
            outline: none;
        }

        /* Responsive styles */
        @media (max-width: 1199px) {
            .tools-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        @media (max-width: 991px) {
            .tools-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .footer__grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 767px) {
            .menu-toggle {
                display: flex;
            }
            
            .nav__list {
                position: fixed;
                top: 0;
                right: -100%;
                height: 100vh;
                width: 80%;
                max-width: 400px;
                background-color: var(--bg-primary);
                flex-direction: column;
                padding: var(--spacing-2xl) var(--spacing-lg);
                box-shadow: var(--shadow);
                transition: var(--transition-smooth);
                z-index: var(--z-modal);
            }
            
            .nav__list.active {
                right: 0;
            }
            
            .mega-menu {
                position: static;
                width: 100%;
                max-width: none;
                box-shadow: none;
                opacity: 1;
                visibility: visible;
                transform: none;
                padding: 0;
                margin-top: var(--spacing-sm);
                display: none;
            }
            
            .mega-menu.active {
                display: block;
            }
            
            .mega-menu__grid {
                grid-template-columns: 1fr;
            }
            
            .tools-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .features-grid {
                grid-template-columns: 1fr;
            }
            
            .hero__cta {
                flex-direction: column;
                align-items: center;
            }
            
            .footer__grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 575px) {
            .tools-grid {
                grid-template-columns: 1fr;
            }
            
            .footer__bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* Utility classes */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        .text-center {
            text-align: center;
        }

        .mt-sm { margin-top: var(--spacing-sm); }
        .mt-md { margin-top: var(--spacing-md); }
        .mt-lg { margin-top: var(--spacing-lg); }
        .mt-xl { margin-top: var(--spacing-xl); }

        .mb-sm { margin-bottom: var(--spacing-sm); }
        .mb-md { margin-bottom: var(--spacing-md); }
        .mb-lg { margin-bottom: var(--spacing-lg); }
        .mb-xl { margin-bottom: var(--spacing-xl); }