```css
/*
Theme Name: MyConvertedTheme
Theme URI: 
Author: WP Converter
Author URI: 
Description: Converted HTML Theme - Professional WordPress Theme with Premium Features
Version: 1.0.0
License: GPL v2 or later
Text Domain: myconvertedtheme
*/

/* ============================================
   1. ROOT VARIABLES & RESET
   ============================================ */

:root {
    /* Colors */
    --color-primary: #0073aa;
    --color-primary-dark: #005a87;
    --color-secondary: #23282d;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-white: #ffffff;
    --color-gray-light: #f5f5f5;
    --color-gray-border: #e0e0e0;
    --color-black: #000000;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-heading: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.25);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 50%;
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1100;
    --z-modal: 1200;
    --z-whatsapp: 1300;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

a:hover {
    color: var(--color-primary-dark);
}

/* ============================================
   2. TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--color-secondary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

/* ============================================
   3. HEADER
   ============================================ */

.site-header {
    background: var(--color-white);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-gray-border);
    position: relative;
    z-index: var(--z-sticky);
}

.site-branding {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.site-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.site-description {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin: 0;
}

/* ============================================
   4. STICKY NAVIGATION
   ============================================ */

.main-navigation {
    position: relative;
    z-index: var(--z-sticky);
}

/* Sticky Navigation - Activated via JavaScript */
.sticky-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-black);
    padding: var(--spacing-sm) 0;
    z-index: var(--z-sticky);
    box-shadow: var(--shadow-lg);
    animation: slideDown 0.5s ease forwards;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.sticky-nav .site-title {
    color: var(--color-white);
}

.sticky-nav .site-description {
    color: rgba(255, 255, 255, 0.7);
}

.sticky-nav .nav-menu a {
    color: var(--color-white);
}

.sticky-nav .nav-menu a:hover {
    color: var(--color-gray-light);
}

/* ============================================
   5. NAVIGATION & DROPDOWN MENUS
   ============================================ */

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-lg);
}

.nav-menu > li {
    position: relative;
}

.nav-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a:focus {
    color: var(--color-primary);
}

/* Dropdown Menus */
.nav-menu .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) 0;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-normal);
    z-index: var(--z-dropdown);
}

.nav-menu li:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-menu .sub-menu .sub-menu {
    top: 0;
    left: 100%;
    margin-left: 4px;
}

.nav-menu .sub-menu a {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 400;
    white-space: nowrap;
}

.nav-menu .sub-menu a:hover {
    background: var(--color-gray-light);
}

/* Dropdown Toggle Arrow */
.menu-item-has-children > a::after {
    content: " ▼";
    font-size: 0.75rem;
    margin-left: var(--spacing-xs);
}

/* Mobile Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--color-text);
}

/* ============================================
   6. BUTTONS
   ============================================ */

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover,
.btn-primary:focus {
    background: var(--color-primary-dark);
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

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

.btn-outline:hover,
.btn-outline:focus {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* ============================================
   7. CARDS
   ============================================ */

.card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

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

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   8. FORMS
   ============================================ */

input[type="text"],
input[type="email"],
input[type="url"],
input[type="password"],
input[type="search"],
textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    border: 1px solid var(--color-gray-border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition-fast);
    background: var(--color-white);
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 115, 170, 0.1);
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

/* ============================================
   9. FOOTER
   ============================================ */

.site-footer {
    background: var(--color-secondary);
    color: var(--color-white);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xxl);
}

.site-footer a {
    color: rgba(255, 255, 255, 0.8);
}

.site-footer a:hover {
    color: var(--color-white);
}

.footer-widgets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   10. FLOATING WHATSAPP BUTTON
   ============================================ */

.floating-whatsapp {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: var(--z-whatsapp);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: #25D366;
    color: var(--color-white);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-normal);
    animation: pulse 2s infinite;
    text-decoration: none;
}

.floating-whatsapp:hover {
    transform: scale(1.1) translateY(-4px);
    box-shadow: var(--shadow-xl);
    background: #20b85f;
    color: var(--color-white);
}

.floating-whatsapp:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 4px;
}

.floating-whatsapp i {
    font-size: 32px;
}

/* WhatsApp Pulse Animation */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.4);
    }
    70% {
        box-shadow: 0 0 0 20px rgba(37, 211, 102, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
    }
}

/* WhatsApp Badge (optional) */
.whatsapp-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: #ff4444;
    color: var(--color-white);
    font-size: 0.625rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: var(--radius-full);
    border: 2px solid var(--color-white);
}

/* ============================================
   11. ICON COMPATIBILITY
   ============================================ */

/* Font Awesome icons will inherit from FA stylesheet */
/* Ensure proper display for social icons */
.social-icons {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.social-icons a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    color: var(--color-text-light);
    background: var(--color-gray-light);
}

.social-icons a:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.social-icons a i {
    font-size: 1.25rem;
}

/* Specific social media colors */
.social-icons a[href*="facebook.com"]:hover {
    background: #1877f2;
    color: var(--color-white);
}

.social-icons a[href*="instagram.com"]:hover {
    background: #e4405f;
    color: var(--color-white);
}

.social-icons a[href*="linkedin.com"]:hover {
    background: #0a66c2;
    color: var(--color-white);
}

.social-icons a[href*="twitter.com"]:hover,
.social-icons a[href*="x.com"]:hover {
    background: #000000;
    color: var(--color-white);
}

.social-icons a[href*="youtube.com"]:hover {
    background: #ff0000;
    color: var(--color-white);
}

.social-icons a[href*="whatsapp.com"]:hover {
    background: #25D366;
    color: var(--color-white);
}

/* ============================================
   12. UTILITIES
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

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

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    word-wrap: normal !important;
}

.screen-reader-text:focus {
    background: var(--color-white);
    color: var(--color-secondary);
    clip: auto !important;
    clip-path: none;
    height: auto;
    left: 5px;
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    top: 5px;
    width: auto;
    z-index: 100000;
}

/* ============================================
   13. RESPONSIVE DESIGN
   ============================================ */

/* Tablets & Small Laptops */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
}

/* Tablets */
@media (max-width: 768px) {
    /* Navigation */
    .menu-toggle {
        display: block;
    }
    
    .nav-menu {
        display: none;
        flex-direction: column;
        width: 100%;
        padding: var(--spacing-md) 0;
    }
    
    .nav-menu.toggled {
        display: flex;
    }
    
    .nav-menu > li {
        width: 100%;
    }
    
    .nav-menu .sub-menu {
        position: static;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        padding-left: var(--spacing-lg);
    }
    
    .nav-menu .sub-menu .sub-menu {
        padding-left: var(--spacing-lg);
        margin-left: 0;
    }
    
    .menu-item-has-children > a::after {
        float: right;
        margin-right: var(--spacing-md);
    }
    
    /* Footer Widgets */
    .footer-widgets {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Floating WhatsApp */
    .floating-whatsapp {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
    }
    
    .floating-whatsapp i {
        font-size: 26px;
    }
    
    /* Typography */
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
}

/* Mobile Phones */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .floating-whatsapp {
        width: 44px;
        height: 44px;
        bottom: 15px;
        right: 15px;
    }
    
    .floating-whatsapp i {
        font-size: 22px;
    }
    
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1.125rem; }
    
    .btn {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 0.875rem;
    }
}

/* ============================================
   14. ACCESSIBILITY & PRINT STYLES
   ============================================ */

@media print {
    .sticky-nav,
    .floating-whatsapp,
    .menu-toggle,
    .social-icons {
        display: none !important;
    }
    
    body {
        background: var(--color-white);
        color: var(--color-black);
    }
    
    a {
        color: var(--color-black);
        text-decoration: underline;
    }
}

/* Focus visible for keyboard navigation */
:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* Skip link */
.skip-link {
    position: absolute;
    top: -9999px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-primary);
    color: var(--color-white);
    z-index: 9999;
}

.skip-link:focus {
    top: 10px;
}

/* ============================================
   END OF STYLESHEET
   ============================================ */
```