/* ENGIX - Implementation spec: professional blues/grays, clean white/light gray, mobile-first */

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

*:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

:root {
    --primary: #1e3a5f;
    --primary-light: #2d4a6f;
    --gray-800: #1f2937;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --bg: #ffffff;
    --bg-subtle: #f9fafb;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 10px 25px rgba(0, 0, 0, 0.12);
    --transition: 200ms ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.main-content {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Hero Section */
.hero {
    padding: 2rem 1.5rem 0.75rem;
    background: linear-gradient(180deg, var(--bg-subtle) 0%, var(--bg) 100%);
}

.hero-inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    gap: 1rem;
}

.hero-left {
    display: flex;
    align-items: center;
    gap: 1rem;
    justify-self: start;
}

/* Slightly bigger than .section-heading (1.5rem–1.75rem), +20% */
.hero-brand {
    font-size: clamp(1.98rem, 4.2vw, 2.4rem);
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.02em;
}

.hero-tagline {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--gray-600);
    margin: 0;
    line-height: 1.5;
}

.hero-cta {
    grid-column: 2;
}

.hero-spacer {
    grid-column: 3;
    justify-self: end;
}

.cta-button {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    padding: 0.75rem 1.75rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.cta-button:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.cta-button:active {
    transform: translateY(0);
}

/* Services Section */
.services-section {
    padding: 0.75rem 1.5rem 4rem;
    flex: 1;
}

.section-heading {
    font-size: clamp(1.5rem, 3vw, 1.75rem);
    font-weight: 600;
    color: var(--primary);
    text-align: center;
    margin-bottom: 2rem;
}

.services-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    gap: 1.5rem;
    grid-template-columns: 1fr;
}

/* Service Cards - spec: clean card, subtle border, icon, title, description; hover: elevation shadow, accent border, 200-300ms */
.service-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.75rem;
    transition: transform 250ms ease, box-shadow 250ms ease, border-color 250ms ease;
    cursor: default;
    position: relative;
    overflow: hidden;
}

/* Card background images with overlay for readability */
.service-card.card-bg-image1,
.service-card.card-bg-image2,
.service-card.card-bg-image3 {
    min-height: 220px;
    background-size: cover;
    background-position: center;
}

.service-card.card-bg-image1 { background-image: url('images/Image1.jpg'); }
.service-card.card-bg-image2 { background-image: url('images/Image2.jpg'); }
.service-card.card-bg-image3 { background-image: url('images/Image3.jpg'); }

.service-card.card-bg-image1::before,
.service-card.card-bg-image2::before,
.service-card.card-bg-image3::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 12px;
    z-index: 0;
}

.service-card.card-bg-image1 .card-icon,
.service-card.card-bg-image1 .card-title,
.service-card.card-bg-image1 .card-description,
.service-card.card-bg-image2 .card-icon,
.service-card.card-bg-image2 .card-title,
.service-card.card-bg-image2 .card-description,
.service-card.card-bg-image3 .card-icon,
.service-card.card-bg-image3 .card-title,
.service-card.card-bg-image3 .card-description {
    position: relative;
    z-index: 1;
    color: #fff;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
}

.service-card.card-bg-image1 .card-icon,
.service-card.card-bg-image2 .card-icon,
.service-card.card-bg-image3 .card-icon {
    color: #e0e7ff;
}

/* Tooltip on Hardware, Software, AI Design card (DexiMind) */
.service-card-tooltip {
    position: relative;
    z-index: 1;
    margin-top: 1rem;
    padding: 0.875rem 1rem;
    background: rgba(0, 0, 0, 0.78);
    backdrop-filter: blur(8px);
    border-radius: 10px;
    font-size: 0.875rem;
    line-height: 1.5;
    color: #f3f4f6;
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.service-card.card-bg-image2:hover .service-card-tooltip,
.service-card.card-bg-image1:hover .service-card-tooltip,
.service-card.card-bg-image3:hover .service-card-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.service-card-tooltip a {
    color: #93c5fd;
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.service-card-tooltip a:hover {
    color: #bfdbfe;
    border-bottom-color: #bfdbfe;
}

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

.service-card .card-icon {
    width: 48px;
    height: 48px;
    color: var(--accent);
    margin-bottom: 1rem;
}

.service-card .card-icon svg {
    width: 100%;
    height: 100%;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 0.5rem;
}

.card-description {
    font-size: 0.95rem;
    color: var(--gray-600);
    line-height: 1.5;
}

/* Tablet: 2-column (640px - 1024px); center the 3rd card on its row */
@media (min-width: 640px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .services-grid .service-card:nth-child(3) {
        grid-column: 1 / -1;
        justify-self: center;
        max-width: min(400px, 100%);
    }
}

/* Desktop: 3-column (> 1024px), centered row of cards */
@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
    }
    .services-grid .service-card:nth-child(3) {
        grid-column: auto;
        justify-self: auto;
        max-width: none;
    }
}

/* Footer – center: ENGIX, Engineering Services, Get in Touch; sides: Legal/Support and Secured/Copyright */
.footer {
    background: var(--gray-800);
    color: #fff;
    padding: 2rem 1.5rem;
    text-align: center;
    line-height: 1.25;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
    gap: 2rem 2.5rem;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem 2.5rem;
    text-align: left;
}

.footer-top {
    margin-bottom: 0;
    text-align: center;
}

.footer-brand {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.1rem;
}

.footer-tagline {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: 0.75rem;
}

.footer-col {
    min-width: 130px;
}

.footer-heading {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 0.35rem;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 0.2rem;
}

.footer-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.footer-link:hover:not([aria-disabled="true"]) {
    color: #fff;
}

.footer-link[aria-disabled="true"] {
    cursor: default;
    opacity: 0.85;
}

.footer-meta {
    text-align: left;
}

.footer-secured {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 0.15rem;
}

.footer-copyright {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
}

.cta-footer {
    background: #fff;
    color: var(--primary);
}

.cta-footer:hover {
    background: var(--gray-100);
    color: var(--primary-light);
}

/* Desktop: Legal/Support left, ENGIX+CTA center, Secured/Copyright right */
@media (min-width: 768px) {
    .footer-inner {
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        align-items: start;
        justify-items: center;
        gap: 2rem 1.5rem;
    }

    .footer-nav {
        justify-content: flex-start;
        justify-self: start;
        text-align: left;
    }

    .footer-top {
        justify-self: center;
        grid-column: 2;
    }

    .footer-meta {
        justify-self: end;
        text-align: right;
    }
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal[aria-hidden="false"] {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--bg);
    border-radius: 16px;
    padding: 2rem;
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
    animation: modalIn 0.25s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close-button {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    font-size: 1.5rem;
    line-height: 1;
    color: var(--gray-500);
    background: none;
    border: none;
    cursor: pointer;
    border-radius: 6px;
    transition: color var(--transition), background var(--transition);
}

.close-button:hover {
    color: var(--gray-800);
    background: var(--gray-100);
}

.modal-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 1.5rem;
    padding-right: 2.5rem;
}

/* Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-800);
    margin-bottom: 0.35rem;
}

.required {
    color: #dc2626;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color var(--transition);
}

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

.form-group input.error,
.form-group textarea.error {
    border-color: #dc2626;
}

.field-error {
    display: block;
    font-size: 0.8rem;
    color: #dc2626;
    margin-top: 0.25rem;
    min-height: 1.2em;
}

.form-actions {
    margin-top: 0.5rem;
}

.submit-button {
    width: 100%;
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background var(--transition), opacity var(--transition);
}

.submit-button:hover:not(:disabled) {
    background: var(--accent-hover);
}

.submit-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.form-success {
    padding: 1rem;
    background: #d1fae5;
    color: #065f46;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
}

.form-success[hidden] {
    display: none !important;
}

.contact-form.hidden {
    display: none !important;
}

/* Mobile */
@media (max-width: 639px) {
    .hero {
        padding: 1.5rem 1rem 1.25rem;
    }
    .hero-inner {
        grid-template-columns: 1fr auto;
        gap: 0.75rem;
    }
    .hero-left {
        grid-column: 1;
        flex-wrap: wrap;
    }
    .hero-cta {
        grid-column: 2;
    }
    .hero-spacer {
        display: none;
    }
    .services-section {
        padding: 0.75rem 1rem 3rem;
    }
    .modal-content {
        padding: 1.5rem;
    }
}