/* CSS Custom Properties — Canonical M-and-E Design Token System (docs/DESIGN.md) */
:root {
    --color-navy: #1B365D;
    --color-navy-deep: #102340;
    --color-sky: #4A90D9;
    --color-sky-light: #EBF3FC;
    --color-orange: #F47920;
    /* Accessible text variants: --color-sky/--color-orange fail WCAG AA as
       normal-size text on white (3.34:1 and 2.76:1). These darker variants
       are used for link text only; the originals stay for decoration/backgrounds. */
    --color-link: #1F5C8F;
    --color-orange-dark: #B34A0B;
    --color-white: #FFFFFF;
    --color-gray-100: #F8F9FA;
    --color-gray-200: #E9ECEF;
    --color-gray-300: #DEE2E6;
    --color-gray-600: #495057;
    --color-gray-900: #212529;
    /* Surface & Semantic Tokens */
    --surface-background: #FFFFFF;
    --surface-elevated: #F8F9FA;
    --surface-sunken: #F1F5F9;
    --surface-glass: rgba(255, 255, 255, 0.90);
    --color-success: #188038;
    --color-success-bg: #E6F4EA;
    --color-warning: #B45309;
    --color-warning-bg: #FEF3C7;
    --color-error: #D93025;
    --color-error-bg: #FCE8E6;
    --border-subtle: rgba(27, 54, 93, 0.10);
    --border-default: #DEE2E6;
    --border-focus: #1F5C8F;
    --font-heading: 'Montserrat', 'Inter', system-ui, -apple-system, sans-serif;
    --font-body: 'Open Sans', 'Inter', system-ui, -apple-system, sans-serif;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --shadow-sm: 0 1px 3px rgba(16, 35, 64, 0.06);
    --shadow-md: 0 4px 12px rgba(16, 35, 64, 0.08);
    --shadow-lg: 0 12px 28px rgba(16, 35, 64, 0.14);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
}

/* Cross-Document View Transitions (MPA Progressive Enhancement) */
@media (prefers-reduced-motion: no-preference) {
    @view-transition {
        navigation: auto;
    }
}

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

html {
    scroll-behavior: smooth;
    @media (prefers-reduced-motion: reduce) {
        scroll-behavior: auto;
    }
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: var(--surface-background);
}

/* Fluid Typography using clamp() */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-navy);
}

h1 { font-size: clamp(1.85rem, 1.35rem + 2vw, 2.5rem); margin-bottom: var(--spacing-md); }
h2 { font-size: clamp(1.5rem, 1.2rem + 1.25vw, 2rem); margin-bottom: var(--spacing-md); }
h3 { font-size: clamp(1.2rem, 1.05rem + 0.6vw, 1.5rem); margin-bottom: var(--spacing-sm); }
h4 { font-size: 1.25rem; margin-bottom: var(--spacing-sm); }

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

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

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

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

.section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    text-align: center;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-2xl);
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-navy);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 1001;
}

.skip-link:focus {
    top: 0;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--surface-glass);
    backdrop-filter: blur(16px) saturate(140%);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border-subtle);
    transition: box-shadow var(--transition-base), background-color var(--transition-base);
}

.header.scrolled {
    background-color: var(--surface-glass);
    backdrop-filter: blur(16px) saturate(140%);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
    gap: var(--spacing-md);
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-navy);
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.logo:hover {
    color: var(--color-navy);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.hamburger-line {
    width: 25px;
    height: 3px;
    background-color: var(--color-navy);
    transition: transform var(--transition-fast);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
    align-items: center;
}

.nav-link {
    color: var(--color-gray-900);
    font-weight: 600;
    font-size: 0.95rem;
    padding: var(--spacing-xs) 0;
    border-bottom: 2px solid transparent;
    transition: border-color var(--transition-fast), color var(--transition-fast);
    white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-navy);
    border-bottom-color: var(--color-orange);
}

.header-cta {
    margin-left: var(--spacing-sm);
    padding: 0.65rem 1.25rem;
    font-size: 0.95rem;
    white-space: nowrap;
}

/* Hero Section — Dynamic Viewport Units (dvh) & Fluid Typography */
.hero,
.service-hero,
.hero-ventilation,
.hero-fire {
    min-height: 62vh;
    min-height: 62dvh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-navy-deep) 0%, var(--color-navy) 55%, #234b80 100%);
    color: var(--color-white);
    padding: var(--spacing-3xl) 0;
    position: relative;
    overflow: hidden;
}

.hero h1,
.service-hero h1,
.hero-ventilation h1,
.hero-fire h1 {
    color: var(--color-white);
    font-size: clamp(2rem, 1.4rem + 2.4vw, 3rem);
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.hero a:not(.btn),
.service-hero a:not(.btn),
.hero-ventilation a:not(.btn),
.hero-fire a:not(.btn),
.cta a:not(.btn),
.cta-banner a:not(.btn),
.cta-section a:not(.btn),
.cert-bar a {
    color: #93C5FD;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.hero a:not(.btn):hover,
.service-hero a:not(.btn):hover,
.cta a:not(.btn):hover,
.cta-banner a:not(.btn):hover,
.cta-section a:not(.btn):hover,
.cert-bar a:hover {
    color: var(--color-white);
}

.hero-subtitle,
.service-hero .subtitle,
.hero .subtitle {
    font-size: clamp(1.15rem, 1rem + 0.6vw, 1.45rem);
    color: #DBEAFE;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.hero-description,
.service-hero p:not(.hero-subtitle):not(.subtitle) {
    font-size: 1.08rem;
    max-width: 68ch;
    color: rgba(255, 255, 255, 0.92);
    margin-bottom: var(--spacing-xl);
    line-height: 1.65;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    align-items: center;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 1.65rem;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
    text-align: center;
    text-decoration: none;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.08rem;
}

.btn-primary {
    background-color: var(--color-orange);
    color: var(--color-white);
    border-color: var(--color-orange);
    box-shadow: 0 4px 14px rgba(244, 121, 32, 0.32);
}

.btn-primary:hover {
    background-color: #d96412;
    border-color: #d96412;
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(244, 121, 32, 0.42);
}

/* Secondary button adapts safely to both light and dark surfaces */
.btn-secondary {
    background-color: transparent;
    color: var(--color-navy);
    border-color: var(--color-navy);
}

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

.hero .btn-secondary,
.service-hero .btn-secondary,
.hero-ventilation .btn-secondary,
.hero-fire .btn-secondary,
.cta .btn-secondary,
.cta-banner .btn-secondary,
.cta-section .btn-secondary {
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.85);
    background-color: rgba(255, 255, 255, 0.08);
}

.hero .btn-secondary:hover,
.service-hero .btn-secondary:hover,
.hero-ventilation .btn-secondary:hover,
.hero-fire .btn-secondary:hover,
.cta .btn-secondary:hover,
.cta-banner .btn-secondary:hover,
.cta-section .btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-navy);
    border-color: var(--color-white);
}

.btn-full {
    width: 100%;
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-gray-100);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    color: var(--color-navy);
}

.service-card h3 {
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.service-link {
    font-weight: 600;
    color: var(--color-orange-dark);
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.feature-box {
    text-align: center;
    padding: var(--spacing-xl);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    color: var(--color-orange);
}

.feature-box h3 {
    margin-bottom: var(--spacing-sm);
}

.feature-box p {
    color: var(--color-gray-600);
}

/* Testimonials Section */
.testimonials {
    background-color: var(--color-gray-100);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.testimonial-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.testimonial-card p {
    font-style: italic;
    margin-bottom: var(--spacing-lg);
}

.testimonial-card cite {
    display: block;
    font-style: normal;
    font-size: 0.875rem;
}

.testimonial-card cite strong {
    display: block;
    color: var(--color-navy);
}

/* CTA Banner */
.cta-banner {
    background-color: var(--color-navy);
    color: var(--color-white);
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.cta-banner h2 {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.cta-banner p {
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
}

.contact-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    color: var(--color-orange);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-weight: 500;
    color: var(--color-gray-900);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: var(--spacing-md);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-sky);
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
    border-color: #dc3545;
}

.error-text {
    color: #dc3545;
    font-size: 0.875rem;
}

/* Footer */
.footer {
    background-color: var(--color-navy);
    color: var(--color-white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

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

.footer-col h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

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

.footer-col li {
    margin-bottom: var(--spacing-sm);
}

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

.footer-col a:hover {
    color: var(--color-orange);
}

.accreditations li {
    font-size: 0.875rem;
    opacity: 0.9;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--spacing-xl);
    text-align: center;
    font-size: 0.875rem;
    opacity: 0.8;
}

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

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

/* Responsive - Tablet */
@media (max-width: 991px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* Responsive - Mobile */
@media (max-width: 767px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .hero {
        min-height: 70vh;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--color-white);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: var(--spacing-xl);
        gap: var(--spacing-md);
        transform: translateX(100%);
        transition: transform var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-link {
        font-size: 1.25rem;
        padding: var(--spacing-md);
    }
    
    .header-cta {
        display: none;
    }
    
    .hamburger.active .hamburger-line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active .hamburger-line:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .hamburger-line:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}

/* ============================================
   CONTACT FORM STYLES
   ============================================ */

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem;
}

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

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-dark, #333);
    font-size: 0.95rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    background-color: #fff;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-color, #0066cc);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.15);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.form-error {
    display: none;
    color: #dc3545;
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.form-group.has-error .form-error {
    display: block;
}

.form-group.has-error .form-input,
.form-group.has-error .form-select,
.form-group.has-error .form-textarea {
    border-color: #dc3545;
}

.btn-submit {
    background-color: var(--primary-color, #0066cc);
    color: #fff;
    padding: 1rem 2rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn-submit:hover {
    background-color: var(--primary-hover, #0052a3);
    transform: translateY(-2px);
}

.btn-submit:active {
    transform: translateY(0);
}

.consent-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.consent-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-top: 0.2rem;
    cursor: pointer;
    accent-color: var(--accent-color, #0066cc);
}

.consent-checkbox label {
    font-size: 0.9rem;
    color: var(--text-muted, #666);
    cursor: pointer;
    line-height: 1.5;
}

/* ============================================
   SERVICE CARD ENHANCEMENTS
   ============================================ */

.service-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    padding: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #eee;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.service-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--accent-light, #e6f0ff);
    border-radius: 12px;
    margin-bottom: 1.25rem;
}

.service-icon svg,
.service-icon img {
    width: 32px;
    height: 32px;
    color: var(--accent-color, #0066cc);
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark, #333);
}

.service-card p {
    color: var(--text-muted, #666);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* ============================================
   TESTIMONIALS SECTION
   ============================================ */

.testimonials {
    background-color: var(--bg-light, #f8f9fa);
    padding: 4rem 0;
}

.testimonial-card {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    font-size: 4rem;
    color: var(--accent-light, #e6f0ff);
    font-family: Georgia, serif;
    position: absolute;
    top: 0.5rem;
    left: 1rem;
    line-height: 1;
}

.testimonial-text {
    font-style: italic;
    color: var(--text-dark, #333);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.testimonial-author {
    font-weight: 600;
    color: var(--text-dark, #333);
    font-size: 1rem;
}

.testimonial-role {
    color: var(--text-muted, #666);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.star-rating {
    color: #ffc107;
    font-size: 1.1rem;
    margin-bottom: 1rem;
    letter-spacing: 2px;
}

.star-rating .star {
    display: inline-block;
}

.star-rating .star.empty {
    color: #ddd;
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

@media (max-width: 768px) {
    .contact-form {
        padding: 1.5rem;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .form-row .form-group {
        width: 100%;
    }
    
    .service-card {
        padding: 1.5rem;
    }
    
    .testimonial-card {
        padding: 1.5rem;
    }
    
    .testimonials {
        padding: 3rem 0;
    }
}

@media (max-width: 480px) {
    .contact-form {
        padding: 1rem;
    }
    
    .btn-submit {
        width: 100%;
        padding: 1rem;
    }
    
    .form-label {
        font-size: 0.9rem;
    }
    
    .form-input,
    .form-select,
    .form-textarea {
        padding: 0.75rem;
        font-size: 0.95rem;
    }
    
    .service-card h3 {
        font-size: 1.1rem;
    }
    
    .testimonial-text {
        font-size: 0.95rem;
        padding-left: 1rem;
    }
    
    .testimonial-card::before {
        font-size: 3rem;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    .service-card,
    .btn-submit,
    .form-input,
    .form-select,
    .form-textarea {
        transition: none;
    }
    
    .service-card:hover {
        transform: none;
    }
    
    .btn-submit:hover {
        transform: none;
    }
}

:focus-visible {
    outline: 2px solid var(--accent-color, #0066cc);
    outline-offset: 2px;
}

.form-input:focus-visible,
.form-select:focus-visible,
.form-textarea:focus-visible {
    outline: 2px solid var(--accent-color, #0066cc);
    outline-offset: 2px;
}

.btn-submit:focus-visible {
    outline: 2px solid var(--accent-color, #0066cc);
    outline-offset: 2px;
}

/* Skip link for keyboard navigation */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color, #0066cc);
    color: #fff;
    padding: 0.5rem 1rem;
    z-index: 1000;
    text-decoration: none;
    border-radius: 0 0 4px 0;
}

.skip-link:focus {
    top: 0;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .form-input,
    .form-select,
    .form-textarea {
        border-width: 2px;
    }
    
    .service-card {
        border-width: 2px;
    }
    
    .btn-submit {
        border: 2px solid currentColor;
    }
}

/* ============================================
   NOMINATED M&E BUILDER MESSAGE
   ============================================ */

.nominated-strip {
    background-color: var(--color-gray-100);
    border-top: 4px solid var(--color-orange);
    padding: var(--spacing-2xl) 0;
}

.nominated-strip .section-subtitle {
    margin-bottom: var(--spacing-lg);
}

.nominated-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.nominated-item {
    background-color: var(--color-white);
    border-left: 4px solid var(--color-sky);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
}

.nominated-item h3 {
    font-size: 1.05rem;
    margin-bottom: var(--spacing-sm);
}

.nominated-item p {
    font-size: 0.95rem;
    color: var(--color-gray-600);
    margin-bottom: 0;
}

/* ============================================================
   Certification Trust Bar (.cert-bar)
   Neutral strip shown on every page: registered-engineer wording,
   MCS-certified partners for grant-funded work, and a link to the
   certification register. Scheme names only where actually held —
   never list unheld accreditations here.
   ============================================================ */
.cert-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.5rem 1.25rem;
    background: var(--color-navy);
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 0.6rem 1rem;
    text-align: center;
}

.cert-bar span {
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
}

.cert-bar span::before {
    content: '·';
    margin-right: 1.25rem;
    color: var(--color-sky);
    opacity: 0.7;
}

.cert-bar span:first-child::before {
    display: none;
}

@media (max-width: 640px) {
    .cert-bar {
        font-size: 0.75rem;
        gap: 0.25rem 0.75rem;
        padding: 0.5rem 0.75rem;
    }
    .cert-bar span::before {
        margin-right: 0.75rem;
    }
}

/* FAQ details styling (used on faqs.html) */
details.faq-item {
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--spacing-md) 0;
}

details.faq-item:last-child {
    border-bottom: none;
}

details.faq-item summary {
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-navy);
    padding: var(--spacing-sm) 0;
}

details.faq-item p {
    margin: var(--spacing-sm) 0 0;
    line-height: 1.6;
    color: var(--color-gray-600);
}

/* ============================================================
   MODERN WEB GUIDANCE UPGRADES (docs/DESIGN.md)
   1. defer-rendering-heavy-content (content-visibility: auto)
   2. validate-input-after-interaction (:user-invalid / :user-valid)
   3. responsive-table (@container + sticky headers + stacked cards)
   4. motion (compositor-only animations + reduced-motion safety)
   ============================================================ */

/* 1. Defer rendering for strictly below-the-fold layout blocks */
.section:not(.hero),
.testimonials,
.pricing-guide,
.compliance-section,
.accreditations-section,
.cta-banner,
.footer {
    content-visibility: auto;
    contain-intrinsic-size: auto none auto 420px;
}

/* 2. Validate input after interaction (:user-invalid & :user-valid) */
.field-hint {
    display: block;
    color: var(--color-gray-600);
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
}

.form-group input:user-invalid,
.form-group select:user-invalid,
.form-group textarea:user-invalid,
.form-group input.user-invalid-fallback,
.form-group select.user-invalid-fallback,
.form-group textarea.user-invalid-fallback {
    border-color: var(--color-error);
    background-color: var(--color-error-bg);
}

.form-group input:user-valid,
.form-group select:user-valid,
.form-group textarea:user-valid,
.form-group input.user-valid-fallback,
.form-group select.user-valid-fallback,
.form-group textarea.user-valid-fallback {
    border-color: var(--color-success);
}

.form-group:has(input:user-invalid, select:user-invalid, textarea:user-invalid) .field-hint {
    color: var(--color-error);
    font-weight: 600;
}

/* 3. Responsive Data Table with Sticky Headers & @container Queries */
.pricing-table-wrapper {
    overflow: auto;
    max-inline-size: 100%;
    max-block-size: min(640px, 80dvh);
    container-type: inline-size;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-default);
    margin-bottom: var(--spacing-md);
}

.pricing-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--surface-background);
    --label-1: "Service";
    --label-2: "Indicative price";
    --label-3: "Notes";
}

.pricing-table thead {
    position: sticky;
    inset-block-start: 0;
    z-index: 1;
    background-color: var(--color-navy);
    color: var(--color-white);
}

.pricing-table th,
.pricing-table td {
    padding: 0.875rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.pricing-table tbody tr:hover {
    background-color: var(--surface-elevated);
}

@container (width < 600px) {
    .pricing-table,
    .pricing-table thead,
    .pricing-table tbody,
    .pricing-table tr,
    .pricing-table th,
    .pricing-table td {
        display: block;
    }

    .pricing-table thead {
        display: none;
    }

    .pricing-table tbody tr {
        margin-block-end: 1rem;
        border: 1px solid var(--border-default);
        border-radius: var(--radius-sm);
        background: var(--surface-background);
    }

    .pricing-table td:nth-child(1) {
        font-weight: 700;
        color: var(--color-navy);
        background: var(--surface-elevated);
    }

    .pricing-table td:nth-child(2)::before {
        content: var(--label-2) ": ";
        font-weight: 600;
        color: var(--color-navy);
    }

    .pricing-table td:nth-child(3)::before {
        content: var(--label-3) ": ";
        font-weight: 600;
        color: var(--color-navy);
    }
}

/* 4. Scroll-driven / IntersectionObserver compositor animations */
.animate-on-scroll {
    opacity: 1;
    transform: translateY(0);
    @media (prefers-reduced-motion: no-preference) {
        transition: opacity 0.45s ease-out, transform 0.45s ease-out;
    }
}

/* 5. Surface Density & Component Container Queries (Samples/platform-integration) */
:root {
    --overscan-safe-px: 0px;
    --min-font-px: 12px;
    --touch-target-min: 44px;
    --density-scale: 1;
}

[data-surface="TOUCH"] {
    --touch-target-min: 48px;
    --density-scale: 1;
}

[data-surface="DESKTOP"] {
    --touch-target-min: 36px;
    --density-scale: 0.95;
}

[data-surface="CINEMATIC"] {
    --overscan-safe-px: 48px;
    --min-font-px: 16px;
    --touch-target-min: 56px;
    --density-scale: 1.25;
}

.btn,
.hamburger,
.nav-link {
    min-block-size: var(--touch-target-min);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

@supports (container-type: inline-size) {
    .services-section .container,
    .services-grid,
    .service-grid,
    .testimonials .container,
    .nominated-strip .container,
    .hero-estimator-wrap {
        container-type: inline-size;
    }
}

/* ============================================================
   6. COMMERCIAL CONVERSION ARCHITECTURE ("DESIGN THAT SELLS")
   - Split-Grid Hero with Interactive 10/60/30 & 15%+ Savings Calculator
   - Side-by-Side JCT Main Contractor vs. M-and-E Direct Comparison Matrix
   - Price-Anchored Service Cards with Deliverables
   - 4-Step Engineering Delivery Timeline
   - Unification for all 29 site pages (grids, badges, callouts, FAQs)
   ============================================================ */

/* Split-Grid Hero */
.hero-split {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.24);
    color: #F8FAFC;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    font-family: var(--font-heading);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
}

.hero-eyebrow-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-orange);
    box-shadow: 0 0 0 4px rgba(244, 121, 32, 0.28);
}

.hero-proof-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.65rem;
    margin-bottom: var(--spacing-xl);
}

.hero-proof-pill {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(16, 35, 64, 0.48);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius-md);
    padding: 0.55rem 0.8rem;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-white);
}

.hero-proof-icon {
    color: #4ADE80;
    font-weight: 700;
    flex-shrink: 0;
}

/* Interactive Hero Estimator Card (10/60/30 + 15% Direct Savings) */
.hero-estimator-card {
    background: var(--color-white);
    color: var(--color-gray-900);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: 0 20px 45px rgba(10, 22, 42, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.hero-estimator-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-gray-200);
}

.hero-estimator-header h2 {
    font-size: 1.15rem;
    color: var(--color-navy);
    margin-bottom: 0.2rem;
}

.hero-estimator-header p {
    font-size: 0.84rem;
    color: var(--color-gray-600);
    margin-bottom: 0;
}

.estimator-badge {
    background: var(--color-success-bg);
    color: var(--color-success);
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    white-space: nowrap;
}

.estimator-presets {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.45rem;
    margin-bottom: 1rem;
}

.estimator-preset-btn {
    background: var(--surface-sunken);
    border: 1px solid var(--color-gray-300);
    color: var(--color-navy);
    border-radius: var(--radius-sm);
    padding: 0.45rem 0.6rem;
    font-family: var(--font-heading);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    text-align: left;
    transition: all var(--transition-fast);
}

.estimator-preset-btn:hover,
.estimator-preset-btn.active {
    background: var(--color-navy);
    color: var(--color-white);
    border-color: var(--color-navy);
}

.estimator-slider-row {
    margin-bottom: 1rem;
}

.estimator-slider-label {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-gray-600);
    margin-bottom: 0.35rem;
}

.estimator-slider-label strong {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    color: var(--color-navy);
}

.estimator-range {
    width: 100%;
    accent-color: var(--color-orange);
    cursor: pointer;
}

.estimator-comparison-box {
    background: var(--surface-sunken);
    border-radius: var(--radius-md);
    padding: 0.85rem 1rem;
    margin-bottom: 0.85rem;
    border: 1px solid var(--color-gray-200);
}

.estimator-comp-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.88rem;
    padding: 0.25rem 0;
}

.estimator-comp-line.jct-route {
    color: var(--color-gray-600);
    text-decoration: line-through;
}

.estimator-comp-line.direct-route {
    font-weight: 700;
    color: var(--color-navy);
    font-size: 1rem;
}

.estimator-savings-Highlight {
    margin-top: 0.45rem;
    padding-top: 0.45rem;
    border-top: 1px dashed var(--color-gray-300);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-success);
    font-weight: 700;
    font-size: 0.92rem;
}

.estimator-milestones {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.milestone-box {
    background: var(--color-sky-light);
    border: 1px solid rgba(74, 144, 217, 0.25);
    border-radius: var(--radius-sm);
    padding: 0.5rem;
    text-align: center;
}

.milestone-pct {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--color-link);
    text-transform: uppercase;
}

.milestone-val {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-navy);
    margin: 0.1rem 0;
}

.milestone-lbl {
    display: block;
    font-size: 0.7rem;
    color: var(--color-gray-600);
}

.estimator-footer-note {
    font-size: 0.75rem;
    color: var(--color-gray-600);
    text-align: center;
    margin-top: 0.5rem;
    margin-bottom: 0;
}

/* Commercial Comparison Matrix (JCT vs Direct M-and-E) */
.comparison-section {
    background-color: var(--surface-sunken);
    border-top: 1px solid var(--color-gray-200);
    border-bottom: 1px solid var(--color-gray-200);
}

.comparison-table-wrapper {
    overflow-x: auto;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-200);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 640px;
}

.comparison-table th,
.comparison-table td {
    padding: 1rem 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
    font-size: 0.95rem;
}

.comparison-table thead th {
    background: var(--color-navy);
    color: var(--color-white);
    font-family: var(--font-heading);
    font-weight: 700;
}

.comparison-table thead th.highlight-col {
    background: var(--color-orange-dark);
    color: var(--color-white);
}

.comparison-table tbody td.highlight-col {
    background: #FFFDF9;
    font-weight: 600;
    color: var(--color-navy);
    border-left: 2px solid var(--color-orange);
    border-right: 2px solid var(--color-orange);
}

.comparison-table tbody tr:last-child td {
    border-bottom: none;
}

/* Upgraded Service Cards with Price Badges & Deliverables */
.card-top-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.85rem;
}

.card-top-meta .service-icon {
    margin-bottom: 0;
}

.card-price-pill,
.price-tag {
    display: inline-block;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--color-navy);
    background: var(--color-sky-light);
    border: 1px solid rgba(74, 144, 217, 0.35);
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
    margin: 0.35rem 0 0.65rem;
}

.card-top-meta .card-price-pill {
    margin: 0;
}

.badge {
    display: inline-block;
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid rgba(24, 128, 56, 0.25);
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    font-family: var(--font-heading);
    font-size: 0.78rem;
    font-weight: 700;
    margin: 0.25rem 0.25rem 0.5rem 0;
}

.card-deliverables {
    list-style: none;
    margin: 0.75rem 0 1.1rem;
    padding: 0;
    border-top: 1px solid var(--color-gray-200);
    padding-top: 0.75rem;
}

.card-deliverables li {
    font-size: 0.88rem;
    color: var(--color-gray-600);
    padding: 0.2rem 0;
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.card-deliverables li::before {
    content: '✓';
    color: var(--color-success);
    font-weight: 700;
}

.card-cta-footer {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-link);
    margin-top: auto;
}

.service-card:hover .card-cta-footer {
    color: var(--color-orange-dark);
}

/* 4-Step Visual Engineering Process Timeline */
.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.process-step-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-default);
    position: relative;
    border-top: 4px solid var(--color-navy);
}

.process-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-sky-light);
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.85rem;
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    margin-bottom: 0.75rem;
}

/* Unification for All 29 Pages (Grids, Sections, Callouts, FAQs) */
.services-section,
.services-overview,
.services-detail,
.compliance-section,
.accreditations-section,
.benefits-section,
.pricing-guide,
.grants,
.faq,
.story,
.values,
.team,
.stats,
.accreditations,
.brands,
.trust-signals,
.google-reviews,
.platforms,
.contact-section,
.map-section,
.related-services {
    padding: var(--spacing-3xl) 0;
}

.service-grid,
.benefits-grid,
.values-grid,
.accreditations-grid,
.badges-grid,
.brands-grid,
.platforms-grid,
.stats-grid,
.team-grid,
.compliance-grid,
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(265px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.benefit-card,
.benefit-item,
.value-card,
.why-card,
.accreditation-item,
.compliance-item,
.platform-item,
.team-card,
.info-card,
.stat-item,
.includes-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-default);
}

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

.stat-number,
.big-number {
    display: block;
    font-family: var(--font-heading);
    font-size: clamp(2rem, 1.5rem + 2vw, 2.75rem);
    font-weight: 700;
    color: var(--color-navy);
    line-height: 1.1;
    margin-bottom: 0.35rem;
}

.value-icon,
.accreditation-logo,
.team-avatar {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.cta,
.cta-banner {
    background: linear-gradient(135deg, var(--color-navy-deep) 0%, var(--color-navy) 100%);
    color: var(--color-white);
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.cta h2,
.cta-banner h2 {
    color: var(--color-white);
}

.cta p,
.cta-banner p {
    color: rgba(255, 255, 255, 0.9);
    max-width: 65ch;
    margin: 0 auto var(--spacing-xl);
}

.cta-section {
    background: linear-gradient(135deg, var(--color-navy-deep) 0%, var(--color-navy) 100%);
    color: var(--color-white);
    padding: 2.25rem;
    border-radius: var(--radius-lg);
    text-align: center;
    margin-top: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
}

.cta-section h2,
.cta-section h3 {
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    max-width: 62ch;
    margin: 0 auto 1.25rem;
}

.cta-section .btn {
    margin: 0.35rem;
}

.warranty-callout,
.deadline-banner,
.emergency,
.scope-note,
.disclaimer {
    background: var(--color-sky-light);
    border-left: 4px solid var(--color-navy);
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
}

.post-date {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-gray-600);
    margin-bottom: 0.4rem;
}

details.faq {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin-bottom: 0.75rem;
    box-shadow: var(--shadow-sm);
}

details.faq summary {
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-navy);
    font-size: 1.02rem;
}

details.faq p {
    margin-top: 0.75rem;
    margin-bottom: 0;
    color: var(--color-gray-600);
}

.area-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.75rem;
    list-style: none;
    padding: 0;
}

.area-list li {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-sm);
    padding: 0.65rem 1rem;
    font-weight: 500;
}

/* Sticky Mobile Action Bar (< 768px) */
.sticky-mobile-bar {
    display: none;
}

@media (max-width: 991px) {
    .hero-split {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 767px) {
    .hero-proof-grid,
    .estimator-presets {
        grid-template-columns: 1fr;
    }

    body {
        padding-bottom: 68px;
    }

    .sticky-mobile-bar {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--color-navy-deep);
        padding: 0.6rem 0.85rem;
        z-index: 999;
        box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.25);
        border-top: 1px solid rgba(255, 255, 255, 0.15);
    }

    .sticky-mobile-bar .btn {
        padding: 0.65rem 0.75rem;
        font-size: 0.88rem;
    }
}

/* Mobile shell containment: the off-canvas nav and desktop CTA created a
   one-viewport horizontal scroll at 375px. Hide the overflow and drop the
   desktop CTA on small screens; the mobile menu still contains Contact. */
@media (max-width: 768px) {
    html,
    body {
        overflow-x: hidden;
    }

    @supports (overflow-x: clip) {
        html,
        body {
            overflow-x: clip;
        }
    }

    .header-cta {
        display: none;
    }

    .nav-menu {
        max-width: 100vw;
    }
}

/* ==========================================================================
   Stitch Design System (assets/9645365137415088570) + Modern Web Guidance
   - card: card-level container-type: inline-size + .card-link stretched-link
   - size-aware-styling: stacked default + @media fallback + @supports/@container
   - defer-rendering-heavy-content: off-screen only (main > .section ~ .section)
   ========================================================================== */
main > .section:first-child,
.hero,
.service-hero {
    content-visibility: visible;
    contain-intrinsic-size: none;
}

main > .section ~ .section {
    content-visibility: auto;
    contain-intrinsic-size: auto none auto 520px;
}

.service-card,
.process-step-card {
    container-type: inline-size;
}

.service-card:has(a.card-link) {
    position: relative;
}

.service-card a.card-link::after {
    content: "";
    position: absolute;
    inset: 0;
}

.service-card:has(a.card-link) a:not(.card-link),
.service-card:has(a.card-link) button,
.service-card:has(a.card-link) input {
    position: relative;
    z-index: 1;
}

.service-card a.card-link:focus-visible {
    outline: none;
}

.service-card:has(a.card-link:focus-visible) {
    outline: 3px solid var(--color-orange);
    outline-offset: 2px;
}

/* Service-Page Commercial & Regulatory KPI Strip (size-aware-styling) */
.service-kpi-strip {
    background: var(--color-white);
    border-bottom: 1px solid var(--border-default);
    padding: 1.25rem 0;
    container-type: inline-size;
}

.service-kpi-grid {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

@media (min-width: 600px) {
    .service-kpi-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 1rem;
    }
}

@supports (container-type: inline-size) {
    @container (min-width: 640px) {
        .service-kpi-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1rem;
        }
    }
}

@container (min-width: 340px) {
    .card-top-meta {
        flex-direction: row;
        align-items: center;
    }
}

.service-kpi-item {
    background: var(--surface-subtle);
    border: 1px solid var(--border-default);
    border-left: 4px solid var(--color-orange);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
}

.service-kpi-item span {
    display: block;
    font-size: 0.76rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-gray-600);
    font-weight: 600;
}

.service-kpi-item strong {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.98rem;
    color: var(--color-navy);
    margin-top: 0.15rem;
}

/* responsive-table & responsive-design (modern-web-guidance) */
.table-container {
    overflow: auto;
    max-inline-size: 100%;
    container-type: inline-size;
}

.table-container:focus-visible {
    outline: 3px solid var(--color-orange);
    outline-offset: 2px;
}

.comparison-table {
    border-collapse: separate;
    border-spacing: 0;
}

.comparison-table thead {
    position: sticky;
    inset-block-start: 0;
    z-index: 1;
}

@media (max-width: 768px) {
    .nav-menu {
        max-width: 100dvw;
    }
}

/* ==========================================================================
   Modern Web Guidance: search-hidden-content, fluid-scaling, typography,
   responsive-design, size-aware-styling (Stitch assets/9645365137415088570)
   ========================================================================== */

/* typography: unitless line-height, text-align: start, overflow-wrap,
   text-wrap: balance on headings/th, text-wrap: pretty & 80ch cap on body */
body {
    line-height: 1.6;
    text-align: start;
    overflow-wrap: break-word;
}

h1, h2, h3, th {
    text-wrap: balance;
}

p,
details.faq p,
details.faq-item p,
details.disclosure p,
blockquote {
    text-wrap: pretty;
    max-width: 80ch;
    overflow-wrap: break-word;
}

/* fluid-scaling & size-aware-styling: define containment contexts */
.service-card,
.accordion-group,
.faq-list,
.component-wrapper {
    container-type: inline-size;
    container-name: fluid-card;
}

.faq-category-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 768px) {
    .faq-category-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@supports (container-type: inline-size) {
    @container (min-width: 680px) {
        .faq-category-grid {
            grid-template-columns: repeat(2, minmax(0, 1fr));
        }
    }
}

/* fluid-scaling: viewport fallback + @supports (font-size: 1cqi) with clamp() (max <= 2.5x min) */
.service-card h3,
.accordion-group h3 {
    font-size: clamp(1.1rem, 1rem + 0.8vw, 1.5rem);
}

details.faq > summary,
details.faq-item > summary,
details.disclosure > summary {
    font-size: clamp(0.98rem, 0.92rem + 0.4vw, 1.2rem);
}

@supports (font-size: 1cqi) {
    .service-card h3,
    .accordion-group h3 {
        font-size: clamp(1.1rem, 4cqi, 1.5rem);
    }

    details.faq > summary,
    details.faq-item > summary,
    details.disclosure > summary {
        font-size: clamp(0.98rem, 3cqi, 1.2rem);
    }
}

/* search-hidden-content: native <details> exclusive disclosure & hidden="until-found" */
details.faq,
details.faq-item,
details.disclosure {
    background: var(--color-white);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: 0.75rem 1.25rem;
    margin-bottom: 0.75rem;
    box-shadow: var(--shadow-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

details.faq[open],
details.faq-item[open],
details.disclosure[open] {
    border-left: 4px solid var(--color-orange);
    box-shadow: var(--shadow-md);
}

details.faq > summary,
details.faq-item > summary,
details.disclosure > summary {
    min-block-size: var(--touch-target-min, 44px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-navy);
    list-style: none;
    padding: 0.25rem 0;
}

details.faq > summary::-webkit-details-marker,
details.faq-item > summary::-webkit-details-marker,
details.disclosure > summary::-webkit-details-marker {
    display: none;
}

details.faq > summary::after,
details.faq-item > summary::after,
details.disclosure > summary::after {
    content: "+";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    inline-size: 1.75rem;
    block-size: 1.75rem;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--color-sky-light);
    color: var(--color-navy);
    font-weight: 700;
    font-size: 1.1rem;
    line-height: 1;
}

details.faq[open] > summary::after,
details.faq-item[open] > summary::after,
details.disclosure[open] > summary::after {
    content: "−";
    background: var(--color-orange);
    color: var(--color-white);
}

details.faq > summary:focus-visible,
details.faq-item > summary:focus-visible,
details.disclosure > summary:focus-visible {
    outline: 3px solid var(--color-orange);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Best practice for hidden="until-found": apply borders/padding/backgrounds to nested
   child wrappers rather than directly to the element with [hidden="until-found"] */
.until-found-panel > .until-found-inner {
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    background: var(--color-white);
}

/* ==========================================================================
   Modern Web Guidance: validate-input-after-interaction & forms
   - :user-invalid / :user-valid + adjacent .error-msg & :has() rule highlighting
   - 48px / 52px coarse-pointer tap targets, expanded label hit area,
     canonical .visually-hidden, and :focus-visible outline
   ========================================================================== */
.hint,
.field-hint {
    display: block;
    color: var(--color-gray-600);
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
}

.error-msg {
    display: none;
    color: var(--color-error, #D93025);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

input:user-invalid,
select:user-invalid,
textarea:user-invalid,
input.user-invalid-fallback,
select.user-invalid-fallback,
textarea.user-invalid-fallback {
    border-color: var(--color-error, #D93025);
    background-color: var(--color-error-bg, #FCE8E6);
}

input:user-invalid + .error-msg,
input.user-invalid-fallback + .error-msg {
    display: block;
}

input:user-valid,
select:user-valid,
textarea:user-valid,
input.user-valid-fallback,
select.user-valid-fallback,
textarea.user-valid-fallback {
    border-color: var(--color-success, #188038);
}

.field:has(input:user-invalid, select:user-invalid, textarea:user-invalid) .rules-list,
.field:has(input:user-invalid, select:user-invalid, textarea:user-invalid) .field-hint,
.field:has(input:user-invalid, select:user-invalid, textarea:user-invalid) .hint {
    color: var(--color-error, #D93025);
    font-weight: 600;
}

.field:has(input:user-valid) .rules-list {
    display: none;
}

.form-group {
    margin-block-end: 1.5rem;
}

label.form-label {
    display: inline-block;
    padding: 10px 0;
    margin: -10px 0 0.25rem;
}

.form-input,
.form-select {
    font-size: 1rem;
    padding: 0.75rem 1rem;
    min-height: 48px;
    box-sizing: border-box;
}

@media (pointer: coarse) {
    .form-input,
    .form-select {
        min-height: 52px;
    }
}

.form-input:focus-visible,
.form-select:focus-visible,
.form-textarea:focus-visible,
.preset:focus-visible {
    outline: 3px solid var(--color-orange);
    outline-offset: 2px;
}

.visually-hidden {
    position: absolute;
    clip-path: inset(50%);
    overflow: hidden;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    border: 0;
    white-space: nowrap;
}