:root {
    /* Color Palette */
    --color-navy: #0A192F;
    --color-navy-light: #112240;
    --color-green: #00B16A;
    --color-green-dark: #008751;
    --color-silver: #E2E8F0;
    --color-silver-light: #F8FAFC;
    --color-silver-dark: #94A3B8;
    --color-white: #FFFFFF;
    --color-black: #0F172A;
    --color-border: #CBD5E1;

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Transitions & Shadows */
    --transition: all 0.3s ease;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-silver-light);
    color: var(--color-black);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex-grow: 1;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-navy);
}

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

a:hover {
    color: var(--color-green);
}

/* Accessibility: Skip to Main Content Link */
.skip-to-main {
    position: absolute;
    top: -100px;
    left: 1rem;
    background: var(--color-green);
    color: var(--color-white);
    padding: 0.75rem 1.25rem;
    z-index: 9999;
    font-weight: 700;
    border-radius: 0 0 6px 6px;
    transition: top 0.2s ease;
    text-decoration: none;
}

.skip-to-main:focus {
    top: 0;
}

/* Accessibility: Visible Focus States */
:focus-visible {
    outline: 2px solid var(--color-green);
    outline-offset: 3px;
}

/* Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.text-center { text-align: center; }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-8 { margin-bottom: 2rem; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    border: none;
    font-family: var(--font-body);
}

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

.btn-primary:hover {
    background-color: var(--color-green-dark);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: var(--color-navy);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Navbar */
.navbar {
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.navbar-brand {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-navy);
}

.navbar-brand span {
    color: var(--color-green);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    font-weight: 500;
    color: var(--color-navy-light);
}

.nav-links a:hover, .nav-links a.active {
    color: var(--color-green);
}

.nav-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    background: none;
    border: none;
    color: var(--color-navy);
}

/* Footer */
.footer {
    background-color: var(--color-navy);
    color: var(--color-silver);
    padding: 4rem 0 2rem;
    margin-top: 4rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    color: var(--color-white);
    margin-bottom: 1.2rem;
    font-size: 1.2rem;
}

.footer-col p {
    margin-bottom: 1rem;
    opacity: 0.8;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: var(--color-silver-dark);
}

.footer-links a:hover {
    color: var(--color-green);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.9rem;
    color: var(--color-silver-dark);
}

/* Floating WhatsApp Button */
.whatsapp-float {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: #25D366;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transition: var(--transition);
}

.whatsapp-float:hover {
    transform: scale(1.1);
    background-color: #1EBE5D;
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-md);
    }
    .nav-links.show {
        display: flex;
    }
    .nav-toggle {
        display: block;
    }
}

/* Nav Dropdowns & CTA Button */
.nav-dropdown {
    position: relative;
}

.nav-arrow {
    font-size: 0.75rem;
    margin-left: 4px;
    transition: transform 0.2s ease;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-white);
    min-width: 240px;
    box-shadow: var(--shadow-lg);
    border-radius: 6px;
    list-style: none;
    padding: 0.5rem 0;
    z-index: 105;
    border: 1px solid var(--color-border);
}

.dropdown-menu li a {
    display: block;
    padding: 0.5rem 1.2rem;
    font-size: 0.9rem;
    color: var(--color-navy);
    white-space: nowrap;
}

.dropdown-menu li a:hover {
    background-color: var(--color-silver-light);
    color: var(--color-green-dark);
}

.nav-dropdown:hover .dropdown-menu {
    display: block;
}

.nav-dropdown:hover .nav-arrow {
    transform: rotate(180deg);
}

.btn-cta-nav {
    background-color: var(--color-green);
    color: var(--color-white) !important;
    padding: 0.4rem 0.9rem;
    border-radius: 4px;
    font-weight: 600;
    transition: var(--transition);
}

.btn-cta-nav:hover {
    background-color: var(--color-green-dark);
    transform: translateY(-1px);
}

/* Breadcrumbs */
.breadcrumb-container {
    background-color: var(--color-silver-light);
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 1.5rem;
}

.breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    font-size: 0.85rem;
    color: var(--color-silver-dark);
}

.breadcrumb-list a {
    color: var(--color-navy);
    font-weight: 500;
}

.breadcrumb-list a:hover {
    color: var(--color-green);
}

.breadcrumb-separator {
    color: var(--color-silver-dark);
}

/* Hero & Content Layouts */
.page-hero {
    background: linear-gradient(135deg, var(--color-navy) 0%, #172a45 100%);
    color: var(--color-white);
    padding: 3.5rem 0;
    margin-bottom: 2.5rem;
}

.page-hero h1 {
    color: var(--color-white);
    font-size: 2.3rem;
    margin-bottom: 0.8rem;
}

.page-hero p {
    font-size: 1.1rem;
    color: var(--color-silver);
    max-width: 800px;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.service-card {
    background-color: var(--color-white);
    border-radius: 8px;
    padding: 1.5rem;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.service-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.service-card p {
    font-size: 0.95rem;
    color: #475569;
    margin-bottom: 1rem;
}

/* Tax Calculator Box */
.calc-box {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    max-width: 700px;
    margin: 0 auto;
}

.calc-group {
    margin-bottom: 1.2rem;
}

.calc-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: var(--color-navy);
}

.calc-group input, .calc-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 1rem;
}

.calc-result {
    margin-top: 1.5rem;
    background: var(--color-silver-light);
    border: 1px dashed var(--color-green);
    border-radius: 6px;
    padding: 1.2rem;
}

.calc-result-row {
    display: flex;
    justify-content: space-between;
    padding: 0.4rem 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.calc-result-row.total {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-green-dark);
    border-bottom: none;
}

/* FAQ Accordions */
.faq-container {
    max-width: 850px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    margin-bottom: 1rem;
    padding: 1.2rem;
}

.faq-item h3 {
    font-size: 1.15rem;
    color: var(--color-navy);
    margin-bottom: 0.5rem;
}

.faq-item p {
    color: #334155;
    font-size: 0.98rem;
    line-height: 1.6;
}

/* Trust Badges & Callouts */
.trust-callout {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border-left: 4px solid var(--color-green);
    padding: 1.2rem 1.5rem;
    border-radius: 4px;
    margin: 1.5rem 0;
}

.trust-callout h4 {
    color: var(--color-green-dark);
    margin-bottom: 0.3rem;
}

/* Calculator Tabs & Navigation */
.calc-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 0.5rem;
}

.calc-tab-btn {
    background: transparent;
    border: none;
    padding: 0.6rem 1.1rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-navy);
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.calc-tab-btn:hover {
    background: var(--color-silver);
}

.calc-tab-btn.active {
    background: var(--color-green);
    color: var(--color-white);
}

.calc-tab-pane {
    display: none;
}

.calc-tab-pane.active {
    display: block;
}

.calc-disclaimer {
    background-color: #FEF3C7;
    border-left: 4px solid #F59E0B;
    color: #92400E;
    padding: 0.85rem 1.2rem;
    border-radius: 4px;
    font-size: 0.88rem;
    margin-top: 1.5rem;
    line-height: 1.5;
}

/* Form Feedback Alerts */
.form-alert {
    padding: 0.9rem 1.2rem;
    border-radius: 6px;
    margin-bottom: 1.2rem;
    font-size: 0.95rem;
    display: none;
}

.form-alert-success {
    background-color: #DCFCE7;
    color: #166534;
    border: 1px solid #86EFAC;
}

.form-alert-error {
    background-color: #FEE2E2;
    color: #991B1B;
    border: 1px solid #FCA5A5;
}

/* Service Detail Cards & Checklist */
.checklist-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.checklist-item i {
    color: var(--color-green);
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.process-step {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
}

.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--color-green);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    margin-right: 0.75rem;
}

/* Mobile Responsive Navigation Fixes */
@media (max-width: 768px) {
    .dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        padding-left: 1rem;
        display: none;
        background: transparent;
    }
    
    .nav-dropdown:hover .dropdown-menu {
        display: none; /* Disable hover toggle on touch devices */
    }

    .nav-dropdown.mobile-open .dropdown-menu {
        display: block;
    }

    .nav-dropdown.mobile-open .nav-arrow {
        transform: rotate(180deg);
    }
    
    .calc-tabs {
        flex-direction: column;
    }
    
    .calc-tab-btn {
        width: 100%;
        text-align: left;
    }
}