/* Define Cascade Layers */
@layer reset, base, theme, components, utilities;

@layer reset {
    /* Box-sizing and Margin Resets */
    *, *::before, *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }

    /* Prevent text size adjustment after orientation change on mobile */
    html {
        -webkit-text-size-adjust: 100%;
        text-size-adjust: 100%;
        scroll-behavior: smooth;
    }

    /* Core body setup */
    body {
        min-block-size: 100vh;
        text-rendering: optimizeSpeed;
        line-height: 1.5;
        overflow-x: hidden;
    }

    /* List styling resets */
    ul, ol {
        list-style: none;
    }

    /* Responsive media defaults */
    img, picture, svg, video {
        max-inline-size: 100%;
        block-size: auto;
        display: block;
    }

    /* Form control resets */
    input, button, textarea, select {
        font: inherit;
        color: inherit;
        background: transparent;
        border: none;
    }

    /* Inherit transitions */
    button, a {
        transition: inherit;
    }

    /* Clear focus outline and manage visible focus ring */
    :focus-visible {
        outline: 2px solid var(--focus-ring-color);
        outline-offset: 4px;
    }
    :focus:not(:focus-visible) {
        outline: none;
    }
}

@layer base {
    /* Base Typography and Colors */
    body {
        font-family: var(--font-body);
        font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
        background-color: var(--bg-primary);
        color: var(--text-primary);
        transition: background-color var(--transition-smooth), color var(--transition-smooth);
    }

    /* Headings */
    h1, h2, h3, h4 {
        font-family: var(--font-heading);
        font-weight: 700;
        line-height: 1.15;
        text-wrap: balance;
        color: var(--text-heading);
    }

    h1 {
        font-size: clamp(2.25rem, 1.5rem + 3.75vw, 4.5rem);
        font-weight: 800;
    }

    h2 {
        font-size: clamp(1.75rem, 1.25rem + 2.5vw, 3.25rem);
    }

    h3 {
        font-size: clamp(1.35rem, 1.15rem + 1vw, 2rem);
    }

    /* Paragraphs and anchors */
    p {
        text-wrap: pretty;
        color: var(--text-secondary);
        max-inline-size: 70ch;
    }

    a {
        color: var(--color-link);
        text-decoration: none;
        cursor: pointer;
    }

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

@layer theme {
    /* Design Tokens and Light/Dark Variables */
    :root {
        color-scheme: light dark;

        /* Font stacks */
        --font-heading: 'Outfit', system-ui, -apple-system, sans-serif;
        --font-body: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;

        /* Semantic colors mapped with light-dark() */
        --bg-primary: light-dark(#f8f9fa, #0b0f17);
        --bg-secondary: light-dark(#ffffff, #111723);
        --bg-tertiary: light-dark(#f1f3f5, #172030);
        
        --text-heading: light-dark(#0b0f17, #ffffff);
        --text-primary: light-dark(#212529, #e9ecef);
        --text-secondary: light-dark(#495057, #a0aec0);
        --text-muted: light-dark(#868e96, #4a5568);

        --border-color: light-dark(#dee2e6, #1c2635);
        --border-color-glow: light-dark(rgba(0, 229, 255, 0.15), rgba(0, 229, 255, 0.3));
        --focus-ring-color: light-dark(#00a8cc, #00e5ff);

        --glass-bg: light-dark(rgba(255, 255, 255, 0.8), rgba(11, 15, 23, 0.8));
        --glass-border: light-dark(rgba(0, 0, 0, 0.06), rgba(255, 255, 255, 0.05));
        --glass-shadow: light-dark(rgba(0, 0, 0, 0.05), rgba(0, 0, 0, 0.3));

        --color-link: light-dark(#007799, #00e5ff);
        --color-link-hover: light-dark(#00a8cc, #80f0ff);

        /* Base Color Accents */
        --color-primary-dark: #070b12;
        --color-accent-cyan: #00e5ff;
        --color-accent-gold: #ff9100;
        --color-accent-green: #00e676;
        
        /* Transitions */
        --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
        --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);

        /* Border Radii */
        --radius-sm: 8px;
        --radius-md: 16px;
        --radius-lg: 24px;
        --radius-circle: 50%;
    }

    /* Scrollbar Styling */
    html {
        scrollbar-color: light-dark(#ced4da, #2d3748) transparent;
        scrollbar-width: thin;
    }
}

@layer components {
    /* Layout Container */
    .container {
        width: 100%;
        max-width: 1200px;
        margin-inline: auto;
        padding-inline: clamp(1rem, 5vw, 2.5rem);
    }

    /* Scroll Progress Indicator */
    .scroll-progress-bar {
        position: fixed;
        top: 0;
        left: 0;
        height: 3px;
        width: 0%;
        background: linear-gradient(90deg, var(--color-accent-cyan), var(--color-accent-gold), var(--color-accent-green));
        z-index: 1000;
        transition: width 0.1s ease;
    }

    /* Main Sticky Header */
    .main-header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 100;
        background-color: var(--glass-bg);
        backdrop-filter: blur(12px) saturate(180%);
        -webkit-backdrop-filter: blur(12px) saturate(180%);
        border-bottom: 1px solid var(--glass-border);
        box-shadow: 0 4px 30px var(--glass-shadow);
        transition: padding var(--transition-smooth), background-color var(--transition-smooth);
        padding-block: var(--space-xs);
    }

    .main-header.scrolled {
        padding-block: 0.5rem;
        background-color: light-dark(rgba(255, 255, 255, 0.95), rgba(7, 11, 18, 0.95));
    }

    .header-container {
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 60px;
    }

    /* Logo Styling */
    .logo {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        transition: transform var(--transition-fast);
    }

    .logo:hover {
        transform: scale(1.02);
    }

    .logo-text {
        font-family: var(--font-heading);
        font-weight: 800;
        font-size: 1.5rem;
        letter-spacing: -0.5px;
        color: var(--text-heading);
    }

    .logo-subtext {
        color: var(--color-accent-cyan);
    }

    /* Desktop Navigation */
    .desktop-nav {
        display: none;
    }

    .nav-list {
        display: flex;
        align-items: center;
        gap: 2rem;
    }

    .nav-link {
        font-weight: 600;
        font-size: 0.95rem;
        color: var(--text-secondary);
        padding: 0.5rem 0;
        position: relative;
    }

    .nav-link::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 2px;
        background-color: var(--color-accent-cyan);
        transform: scaleX(0);
        transform-origin: right;
        transition: transform var(--transition-smooth);
    }

    .nav-link:hover {
        color: var(--text-heading);
    }

    .nav-link:hover::after {
        transform: scaleX(1);
        transform-origin: left;
    }

    /* Navigation Action CTA Button */
    .cta-nav {
        background: linear-gradient(135deg, rgba(0, 229, 255, 0.1), rgba(0, 230, 118, 0.1));
        border: 1px solid rgba(0, 229, 255, 0.3);
        padding: 0.5rem 1.25rem;
        border-radius: var(--radius-sm);
        transition: all var(--transition-fast);
    }

    .cta-nav:hover {
        background: linear-gradient(135deg, rgba(0, 229, 255, 0.2), rgba(0, 230, 118, 0.2));
        border-color: var(--color-accent-cyan);
        box-shadow: 0 0 15px rgba(0, 229, 255, 0.2);
    }

    /* Theme Toggle Button */
    .theme-toggle-btn {
        width: 40px;
        height: 40px;
        border-radius: var(--radius-circle);
        display: flex;
        align-items: center;
        justify-content: center;
        border: 1px solid var(--border-color);
        cursor: pointer;
        color: var(--text-primary);
        transition: background-color var(--transition-fast), border-color var(--transition-fast);
    }

    .theme-toggle-btn:hover {
        background-color: var(--bg-tertiary);
        border-color: var(--color-accent-cyan);
    }

    /* Light/dark switch toggled icon display */
    .sun-icon { display: block; }
    .moon-icon { display: none; }

    :root[color-scheme="dark"] .sun-icon { display: none; }
    :root[color-scheme="dark"] .moon-icon { display: block; }

    /* Touch targets upgrade on coarse pointers */
    @media (pointer: coarse) {
        .theme-toggle-btn, .mobile-menu-toggle {
            min-block-size: 44px;
            min-inline-size: 44px;
        }
        .nav-link, .mobile-nav-link {
            padding-block: 0.75rem;
        }
    }

    /* Mobile Hamburger Menu */
    .mobile-menu-toggle {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        width: 30px;
        height: 20px;
        cursor: pointer;
        z-index: 150;
    }

    .hamburger-bar {
        width: 100%;
        height: 2.5px;
        background-color: var(--text-heading);
        border-radius: 2px;
        transition: transform var(--transition-smooth), opacity var(--transition-smooth);
    }

    .mobile-menu-toggle[aria-expanded="true"] .hamburger-bar:nth-child(1) {
        transform: translateY(8.5px) rotate(45deg);
    }
    .mobile-menu-toggle[aria-expanded="true"] .hamburger-bar:nth-child(2) {
        opacity: 0;
    }
    .mobile-menu-toggle[aria-expanded="true"] .hamburger-bar:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    /* Mobile Menu Drawer */
    .mobile-nav {
        position: fixed;
        top: 0;
        right: 0;
        width: 100%;
        max-width: 320px;
        height: 100vh;
        background-color: var(--bg-secondary);
        z-index: 90;
        padding: 100px 2rem 2rem;
        border-left: 1px solid var(--border-color);
        box-shadow: -10px 0 30px var(--glass-shadow);
        transform: translateX(100%);
        transition: transform var(--transition-smooth);
        display: flex;
        flex-direction: column;
    }

    .mobile-nav.active {
        transform: translateX(0);
    }

    .mobile-nav-list {
        display: flex;
        flex-direction: column;
        gap: 2rem;
    }

    .mobile-nav-link {
        font-family: var(--font-heading);
        font-weight: 700;
        font-size: 1.5rem;
        color: var(--text-heading);
    }

    .mobile-cta {
        display: inline-block;
        background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-green));
        color: var(--color-primary-dark);
        padding: 0.75rem 1.5rem;
        border-radius: var(--radius-sm);
        text-align: center;
        font-weight: 700;
        margin-top: 1rem;
    }

    /* Buttons */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 0.75rem 1.75rem;
        border-radius: var(--radius-sm);
        font-weight: 700;
        font-size: 0.95rem;
        cursor: pointer;
        transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
        gap: 0.5rem;
    }

    .btn:hover {
        transform: translateY(-2px);
    }

    .btn-primary {
        background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-green));
        color: var(--color-primary-dark);
        box-shadow: 0 4px 15px rgba(0, 229, 255, 0.3);
    }

    .btn-primary:hover {
        box-shadow: 0 6px 20px rgba(0, 229, 255, 0.4);
    }

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

    .btn-secondary:hover {
        border-color: var(--color-accent-cyan);
        background-color: var(--bg-secondary);
    }

    .btn-block {
        width: 100%;
    }

    .btn-sm {
        padding: 0.5rem 1.25rem;
        font-size: 0.85rem;
    }

    /* Badge */
    .badge {
        display: inline-block;
        padding: 0.35rem 1rem;
        border-radius: 50px;
        font-size: 0.75rem;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 1.5px;
        background-color: rgba(0, 229, 255, 0.1);
        color: var(--color-accent-cyan);
        border: 1px solid rgba(0, 229, 255, 0.2);
        margin-bottom: 1.5rem;
    }

    /* Hero Section */
    .hero-section {
        min-block-size: 100vh;
        display: flex;
        flex-direction: column;
        justify-content: center;
        position: relative;
        background-size: cover;
        background-position: center;
        background-attachment: scroll;
        padding-block: 100px 50px;
        overflow: hidden;
    }

    .hero-container {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        flex-grow: 1;
        gap: 3rem;
    }

    .hero-content {
        max-width: 800px;
        margin-block: auto;
    }

    .hero-title {
        margin-bottom: 1.5rem;
        color: #ffffff;
    }

    .text-glow {
        color: var(--color-accent-cyan);
        text-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
    }

    .hero-title .text-glow:nth-of-type(2) {
        color: var(--color-accent-green);
        text-shadow: 0 0 20px rgba(0, 230, 118, 0.4);
    }

    .hero-description {
        font-size: clamp(1.1rem, 1rem + 0.5vw, 1.4rem);
        margin-bottom: 2.5rem;
        color: #e2e8f0;
    }

    .hero-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
    }

    .hero-certs {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1rem;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        padding-top: 2rem;
    }

    .hero-cert-item {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        color: #cbd5e1;
        font-size: 0.95rem;
    }

    .cert-check {
        color: var(--color-accent-green);
    }

    /* Section Headers */
    .section-header {
        max-width: 700px;
        margin-bottom: clamp(2.5rem, 5vw, 4rem);
    }

    .section-subtitle {
        font-family: var(--font-heading);
        font-weight: 700;
        font-size: 0.85rem;
        color: var(--color-accent-cyan);
        text-transform: uppercase;
        letter-spacing: 2px;
        display: block;
        margin-bottom: 0.75rem;
    }

    .section-title {
        margin-bottom: 1rem;
    }

    /* Services Section */
    .services-section {
        padding-block: clamp(4rem, 8vw, 8rem);
        background-color: var(--bg-secondary);
        position: relative;
    }

    .services-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .service-card {
        background-color: var(--bg-primary);
        border: 1px solid var(--border-color);
        padding: 2.5rem;
        border-radius: var(--radius-md);
        transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
        display: flex;
        flex-direction: column;
        position: relative;
        overflow: hidden;
    }

    .service-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 3px;
        background: var(--card-border-grad, var(--color-accent-cyan));
        opacity: 0;
        transition: opacity var(--transition-fast);
    }

    .service-card:hover {
        transform: translateY(-6px);
        border-color: var(--border-color-glow);
        box-shadow: 0 10px 30px rgba(0, 229, 255, 0.05);
    }

    .service-card:hover::before {
        opacity: 1;
    }

    /* Specific gradients for card tops */
    #srv-elec { --card-border-grad: var(--color-accent-gold); }
    #srv-knx { --card-border-grad: linear-gradient(90deg, var(--color-accent-cyan), var(--color-accent-gold)); }
    #srv-reseau { --card-border-grad: var(--color-accent-cyan); }
    #srv-irve { --card-border-grad: var(--color-accent-green); }

    .service-icon-wrapper {
        width: 50px;
        height: 50px;
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 1.5rem;
        background-color: var(--bg-tertiary);
    }

    .color-electric { color: var(--color-accent-gold); background-color: rgba(255, 145, 0, 0.1); }
    .color-knx { color: var(--color-accent-cyan); background-color: rgba(0, 229, 255, 0.1); }
    .color-network { color: var(--color-accent-cyan); background-color: rgba(0, 229, 255, 0.1); }
    .color-irve { color: var(--color-accent-green); background-color: rgba(0, 230, 118, 0.1); }

    .service-card-title {
        margin-bottom: 1rem;
    }

    .service-card-text {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
        flex-grow: 1;
    }

    .service-list {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
        border-top: 1px solid var(--border-color);
        padding-top: 1.25rem;
    }

    .service-list li {
        font-size: 0.85rem;
        color: var(--text-secondary);
        display: flex;
        align-items: center;
        gap: 0.5rem;
        font-weight: 500;
    }

    .service-list li::before {
        content: '';
        width: 6px;
        height: 6px;
        border-radius: var(--radius-circle);
        background-color: var(--card-border-grad, var(--color-accent-cyan));
    }

    /* Secteurs Section */
    .sectors-section {
        padding-block: clamp(4rem, 8vw, 8rem);
        background-color: var(--bg-primary);
    }

    .sectors-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .sector-card {
        background-color: var(--bg-secondary);
        border: 1px solid var(--border-color);
        padding: 3rem 2.5rem;
        border-radius: var(--radius-md);
        position: relative;
        overflow: hidden;
        transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    }

    .sector-bg-glow {
        position: absolute;
        bottom: -50px;
        right: -50px;
        width: 150px;
        height: 150px;
        border-radius: var(--radius-circle);
        background: radial-gradient(circle, var(--glow-color, rgba(0, 229, 255, 0.08)) 0%, transparent 70%);
        transition: transform var(--transition-smooth);
        pointer-events: none;
    }

    .sector-card:hover {
        border-color: var(--border-color-glow);
        box-shadow: 0 10px 30px var(--glass-shadow);
    }

    .sector-card:hover .sector-bg-glow {
        transform: scale(1.5);
    }

    #sector-part { --glow-color: rgba(255, 145, 0, 0.08); }
    #sector-ent { --glow-color: rgba(0, 229, 255, 0.08); }
    #sector-tert { --glow-color: rgba(0, 230, 118, 0.08); }

    .sector-card-title {
        margin-bottom: 1rem;
        position: relative;
    }

    .sector-card-text {
        font-size: 0.95rem;
        position: relative;
        z-index: 2;
    }

    /* Certifications Section */
    .certs-section {
        padding-block: clamp(4rem, 8vw, 8rem);
        background-color: var(--bg-secondary);
        border-top: 1px solid var(--border-color);
    }

    .certs-container {
        display: grid;
        grid-template-columns: 1fr;
        gap: 4rem;
        align-items: center;
    }

    .certs-text p {
        margin-bottom: 1.5rem;
    }

    .certs-badges-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .cert-badge-card {
        background-color: var(--bg-primary);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 2.5rem;
        text-align: center;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .cert-badge-visual {
        width: 80px;
        height: 80px;
        border-radius: var(--radius-circle);
        background-color: var(--color-primary-dark);
        border: 2px solid var(--color-accent-cyan);
        color: var(--color-accent-cyan);
        display: flex;
        align-items: center;
        justify-content: center;
        font-family: var(--font-heading);
        font-weight: 800;
        font-size: 1.25rem;
        letter-spacing: 1px;
        margin-bottom: 1.5rem;
        box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
    }

    .cert-badge-visual.green {
        border-color: var(--color-accent-green);
        color: var(--color-accent-green);
        box-shadow: 0 0 20px rgba(0, 230, 118, 0.2);
    }

    .cert-badge-card h4 {
        margin-bottom: 0.5rem;
    }

    .cert-badge-card p {
        font-size: 0.9rem;
    }

    /* Contact Section */
    .contact-section {
        padding-block: clamp(4rem, 8vw, 8rem);
        background-color: var(--bg-primary);
    }

    .contact-container {
        display: grid;
        grid-template-columns: 1fr;
        gap: 4rem;
    }

    .contact-info {
        display: flex;
        flex-direction: column;
    }

    .contact-lead {
        font-size: 1.15rem;
        margin-bottom: 3rem;
    }

    .contact-details {
        display: flex;
        flex-direction: column;
        gap: 2rem;
    }

    .contact-detail-item {
        display: flex;
        gap: 1.25rem;
        align-items: flex-start;
    }

    .detail-icon {
        color: var(--color-accent-cyan);
        flex-shrink: 0;
        margin-top: 0.25rem;
    }

    .contact-detail-item h5 {
        font-size: 0.85rem;
        text-transform: uppercase;
        letter-spacing: 1px;
        color: var(--text-secondary);
        margin-bottom: 0.25rem;
    }

    .contact-link {
        font-family: var(--font-heading);
        font-weight: 700;
        font-size: 1.2rem;
        color: var(--text-heading);
    }

    .contact-link:hover {
        color: var(--color-accent-cyan);
    }

    .contact-text {
        color: var(--text-primary);
        font-weight: 600;
    }

    /* Contact Form */
    .contact-form-wrapper {
        background-color: var(--bg-secondary);
        border: 1px solid var(--border-color);
        padding: clamp(1.5rem, 5vw, 3rem);
        border-radius: var(--radius-md);
        box-shadow: 0 10px 40px var(--glass-shadow);
        position: relative;
    }

    .contact-form {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }

    .form-title {
        margin-bottom: 0.5rem;
    }

    .form-group {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }

    .form-row {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .form-group label {
        font-size: 0.85rem;
        font-weight: 600;
        color: var(--text-secondary);
    }

    .form-group input, 
    .form-group textarea, 
    .form-group select {
        width: 100%;
        background-color: var(--bg-tertiary);
        border: 1px solid var(--border-color);
        padding: 0.75rem 1rem;
        border-radius: var(--radius-sm);
        color: var(--text-primary);
        transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    }

    .form-group input:focus, 
    .form-group textarea:focus, 
    .form-group select:focus {
        border-color: var(--color-accent-cyan);
        box-shadow: 0 0 10px rgba(0, 229, 255, 0.15);
        outline: none;
    }

    .form-group textarea {
        resize: vertical;
        min-height: 120px;
    }

    /* Select wrapping */
    .select-wrapper {
        position: relative;
        width: 100%;
    }

    .select-wrapper::after {
        content: '▼';
        font-size: 0.7rem;
        color: var(--text-secondary);
        position: absolute;
        right: 1.2rem;
        top: 50%;
        transform: translateY(-50%);
        pointer-events: none;
    }

    .form-group select {
        appearance: none;
        -webkit-appearance: none;
        padding-right: 2.5rem;
    }

    /* Modern Validation style using :user-invalid */
    .form-group input:user-invalid,
    .form-group textarea:user-invalid,
    .form-group select:user-invalid {
        border-color: #ff5252;
        box-shadow: 0 0 10px rgba(255, 82, 82, 0.1);
    }

    .form-group input:user-invalid ~ .error-message,
    .form-group textarea:user-invalid ~ .error-message,
    .form-group select:user-invalid ~ .error-message {
        display: block;
    }

    .error-message {
        display: none;
        font-size: 0.75rem;
        color: #ff5252;
        font-weight: 600;
        margin-top: 0.25rem;
    }

    /* Feedback Cards */
    .form-feedback-card {
        text-align: center;
        padding: 2rem 1rem;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        animation: fadeIn 0.4s ease forwards;
    }

    .form-feedback-card.success svg {
        color: var(--color-accent-green);
    }

    .form-feedback-card h4 {
        font-size: 1.5rem;
    }

    /* Footer */
    .main-footer {
        background-color: var(--color-primary-dark);
        color: #94a3b8;
        padding-block: 5px;
        border-top: 1px solid #1e293b;
        font-size: 0.9rem;
    }

    .main-footer .logo-text {
        color: #ffffff;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 3rem;
        padding-block: 5rem 3rem;
    }

    .footer-brand {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }

    .footer-tagline {
        font-size: 0.9rem;
        color: #94a3b8;
    }

    .footer-links-col h4 {
        color: #ffffff;
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }

    .footer-links-col ul {
        display: flex;
        flex-direction: column;
        gap: 0.75rem;
    }

    .footer-links-col a {
        color: #94a3b8;
    }

    .footer-links-col a:hover {
        color: var(--color-accent-cyan);
    }

    .footer-bottom {
        border-top: 1px solid #1e293b;
        padding-block: 2rem;
        display: flex;
        flex-direction: column;
        gap: 1rem;
        align-items: center;
        text-align: center;
    }

    .footer-legal {
        display: flex;
        gap: 1rem;
    }

    .footer-legal a {
        color: #94a3b8;
    }

    .footer-legal a:hover {
        color: var(--color-accent-cyan);
    }
}

@layer utilities {
    /* Screen Reader Only (Accessibility Helper) */
    .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;
    }

    /* Layout Spacing */
    .py-lg { padding-block: clamp(3rem, 6vw, 6rem); }
    
    /* Text Helpers */
    .text-center { text-align: center; }
}

/* Scroll reveals (Keyframes) */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Grid System / Breakpoints */
@media (min-width: 768px) {
    @layer components {
        .header-container {
            height: 80px;
        }

        .desktop-nav {
            display: block;
        }

        .mobile-menu-toggle {
            display: none;
        }

        .hero-certs {
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .services-grid {
            grid-template-columns: repeat(2, 1fr);
        }

        .sectors-grid {
            grid-template-columns: repeat(3, 1fr);
        }

        .certs-container {
            grid-template-columns: 1.2fr 1fr;
        }

        .contact-container {
            grid-template-columns: 1fr 1.2fr;
        }

        .form-row {
            grid-template-columns: repeat(2, 1fr);
        }

        .footer-grid {
            grid-template-columns: 2fr repeat(3, 1fr);
        }

        .footer-bottom {
            flex-direction: row;
            justify-content: space-between;
            text-align: left;
        }
    }
}

@media (min-width: 1024px) {
    @layer components {
        .services-grid {
            grid-template-columns: repeat(4, 1fr);
        }
    }
}