/* Start: Global reset and default page typography/background. */
* {
    /* Remove browser defaults so spacing is consistent across elements. */
    margin: 0;
    padding: 0;
    /* Include padding and borders inside each declared element size. */
    box-sizing: border-box;
}

body {
    /* Use a system font and prevent horizontal overflow on narrow screens. */
    font-family: 'Arial', sans-serif;
    overflow-x: hidden;
    /* Set the page's light gray base color. */
    background: #f0f2f5;
}

html {
    /* Keep page scrolling available while hiding the browser's scrollbar chrome. */
    scrollbar-width: none;
    -ms-overflow-style: none;
}

html::-webkit-scrollbar {
    /* Hide the page scrollbar in Chromium and Safari without disabling scrolling. */
    display: none;
}
/* End: Global reset and page defaults. */

/* Start: Navigation bar layout and appearance. */
:root {
    --nav-height: 60px;
}

nav {
    /* Keep navigation visible at the top while the page scrolls. */
    position: fixed;
    top: 0;
    width: 100%;
    /* Use a translucent background with spacing and horizontal flex layout. */
    background: rgba(248, 249, 250, 0.2);
    padding: 0.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    /* Place navigation above page content and keep its height consistent. */
    z-index: 1000;
    height: var(--nav-height);
    /* Add subtle depth, blur, and a gold-toned divider. */
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(212, 175, 55, 0.15);
    transition: height 0.45s cubic-bezier(0.22, 1, 0.36, 1),
        background-color 0.45s ease,
        box-shadow 0.45s ease,
        border-color 0.45s ease;
}

nav.scrolled {
    /* Give the compact header a little more breathing room after scrolling. */
    --nav-height: 72px;
    background: rgba(248, 249, 250, 0.2);
    box-shadow: 0 8px 28px rgba(40, 48, 58, 0.14);
    border-bottom-color: rgba(212, 175, 55, 0.28);
}

/* .logo-text: company name shown before the page is scrolled. */
.logo-text {
    /* Keep the company name aligned with the logo during the crossfade. */
    position: absolute;
    left: 2rem;
    top: 50%;
    color: #3d4852;
    font-size: 1.2rem;
    font-weight: bold;
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) scale(1);
    transform-origin: left center;
    transition: opacity 0.35s ease, transform 0.5s cubic-bezier(0.22, 1, 0.36, 1), visibility 0.35s;
    letter-spacing: 0.5px;
}

/* .logo-img: logo image shown in the compact scrolled navigation. */
.logo-img {
    /* Place the logo over the title position for a smooth fade-and-scale transition. */
    position: absolute;
    left: 2rem;
    top: 50%;
    height: 40px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(calc(-50% + 7px)) scale(0.88);
    transform-origin: left center;
    transition: opacity 0.4s ease, transform 0.55s cubic-bezier(0.22, 1, 0.36, 1), visibility 0.4s;
    pointer-events: none;
}

/* Fit the image inside the compact logo container. */
.logo-img img {
    /* Preserve the logo's proportions while fitting its container. */
    height: 100%;
    width: auto;
    object-fit: contain;
}

/* .scrolled: switch the navigation from the company name to its logo. */
nav.scrolled .logo-text {
    opacity: 0;
    visibility: hidden;
    transform: translateY(calc(-50% - 7px)) scale(0.96);
}

/* Show the logo when the navigation enters its scrolled state. */
nav.scrolled .logo-img {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) scale(1);
}

/* .nav-links: arrange the section links across the navigation bar. */
.nav-links {
    /* Lay links in one row with even spacing and no list markers. */
    display: flex;
    margin-left: auto;
    gap: 2.5rem;
    list-style: none;
    transition: gap 0.45s ease;
}

/* Position each navigation item and style its link and hover state. */
.nav-links li {
    /* Establish a positioning context for any future item-level effects. */
    position: relative;
}

.nav-links a {
    /* Style links as readable, clickable blocks without underlines. */
    color: #3d4852;
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    display: block;
}

.nav-links a:hover {
    /* Highlight links with the brand gold color on pointer hover. */
    color: #d4af37;
    background: rgba(212, 175, 55, 0.1);
}

/* .menu-icon: draw the three-line mobile menu button. */
.menu-icon {
    /* Stack the menu lines; hide the icon on wider screens by default. */
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

/* Draw the lines and animate them into a close icon when active. */
.menu-icon span {
    /* Draw each menu line and animate its change to the close icon. */
    width: 25px;
    height: 3px;
    background: #3d4852;
    transition: all 0.3s;
}

.menu-icon.active span:nth-child(1) {
    /* Rotate and shift the first line to form the top half of an X. */
    transform: rotate(45deg) translate(8px, 8px);
}

.menu-icon.active span:nth-child(2) {
    /* Hide the center line while the menu is open. */
    opacity: 0;
}

.menu-icon.active span:nth-child(3) {
    /* Rotate and shift the last line to form the bottom half of an X. */
    transform: rotate(-45deg) translate(7px, -7px);
}
/* End: Navigation bar and menu icon styles. */

/* Start: Hero layout, text, and decorative background shapes. */
.hero {
    /* Offset the fixed navigation and make the hero fill most of the screen. */
    margin-top: 60px;
    min-height: 90vh;
    background: linear-gradient(135deg, #e8eaf0 0%, #d4d9e3 100%);
    /* Arrange hero text and illustration side by side and center them. */
    display: flex;
    align-items: center;
    justify-content: space-between;
    /* Add breathing room and clip decorative shapes at the hero edge. */
    padding: 4rem 2rem;
    gap: 2rem;
    position: relative;
    overflow: hidden;
}

/* Decorative gold glow behind the hero content. */
.hero::before {
    /* Position a large, soft gold glow partly outside the hero. */
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

/* Decorative purple glow behind the hero content. */
.hero::after {
    /* Position a soft purple glow opposite the gold decoration. */
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(106, 90, 205, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-text {
    /* Let the text share available width and sit above background effects. */
    flex: 1;
    color: #3d4852;
    position: relative;
    z-index: 1;
}

/* .hero-text: present the main heading and introduction. */
.hero-text h1 {
    /* Use a large gradient-filled heading with separation below it. */
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #3d4852 0%, #6a5acd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    /* Make the introduction comfortably readable beneath the heading. */
    font-size: 1.3rem;
    line-height: 1.6;
    color: #5a6570;
}

/* .hero-image: center and size the CNC illustration. */
.hero-image {
    /* Center the illustration in the other half of the hero layout. */
    flex: 1;
    display: flex;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.hero-image img {
    /* Preserve the vector illustration's proportions and keep it responsive. */
    display: block;
    width: 100%;
    max-width: 500px;
    max-height: 360px;
    height: auto;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}
/* End: Hero section styles. */

/* Start: Shared section spacing, alternating backgrounds, and headings. */
section {
    /* Give sections consistent interior spacing and minimum vertical room. */
    padding: 4rem 2rem;
    min-height: 70vh;
}

section:nth-child(even) {
    /* Alternate section backgrounds for visual separation. */
    background: linear-gradient(to bottom, #f5f7fa 0%, #e8eaf0 100%);
    position: relative;
}

section:nth-child(even)::after {
    /* Draw a thin centered gold divider at the top of the section. */
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.25), transparent);
}

section:nth-child(odd) {
    /* Give the alternate sections a slightly different gray gradient. */
    background: linear-gradient(to bottom, #eef0f4 0%, #dce0e8 100%);
    position: relative;
}

section:nth-child(odd)::after {
    /* Reuse the centered divider on the alternating section background. */
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.25), transparent);
}

/* .container: keep each section's content centered and readable. */
.container {
    /* Limit line length and center the content within the page. */
    max-width: 1200px;
    margin: 0 auto;
}

/* Style section headings and add a short gradient underline. */
h2 {
    /* Set section title size, spacing, and positioning for its underline. */
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #3d4852;
    position: relative;
    display: inline-block;
}

h2::after {
    /* Place a short gold-to-purple accent line below each section title. */
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #d4af37, #6a5acd);
    border-radius: 2px;
}

/* Set the shared typography and spacing for paragraph text. */
p {
    /* Keep paragraph text readable with comfortable line and block spacing. */
    font-size: 1.1rem;
    line-height: 1.8;
    color: #5a6570;
    margin-bottom: 1.5rem;
}
/* End: Shared section and text styles. */

/* Start: .grid arranges content cards; .card defines each reusable information panel. */
.grid {
    /* Create responsive columns that wrap cards when space is limited. */
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* .card: give each item a raised panel with a subtle gold border. */
.card {
    /* Give information cards a soft surface, interior spacing, and rounded corners. */
    background: linear-gradient(145deg, #f8f9fb 0%, #eef0f4 100%);
    padding: 2rem;
    border-radius: 20px;
    /* Add a subtle shadow, animated hover transitions, and a gold outline. */
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid rgba(212, 175, 55, 0.12);
    position: relative;
}

/* Start: Vector illustration panels inside manufacturing and service cards. */
.card-illustration {
    /* Give each card a consistent full-width illustration panel above its text. */
    overflow: hidden;
    height: 160px;
    margin: -2rem -2rem 1.5rem;
    border-radius: 18px 18px 0 0;
    background: linear-gradient(135deg, #f0f2f7 0%, #e5e8f0 100%);
}

.card-illustration img {
    /* Scale crisp SVG artwork to the card panel without stretching it. */
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: filter 0.35s ease, transform 0.35s ease;
}

.card:hover .card-illustration img {
    /* Gently dim and enlarge the illustration when its card is hovered. */
    filter: brightness(0.82);
    transform: scale(1.04);
}
/* End: Card illustration panels. */

/* Lift a card and highlight its border when the pointer hovers over it. */
.card:hover {
    /* Raise and slightly enlarge the card, emphasizing its gold border. */
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 20px 60px rgba(212, 175, 55, 0.2);
    border-color: rgba(212, 175, 55, 0.4);
}

/* Keep the contact form panel stationary instead of applying the card hover effect. */
.contact-card:hover {
    transform: none;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
    border-color: rgba(212, 175, 55, 0.12);
}

/* .card h3: emphasize the title at the top of each information panel. */
.card h3 {
    /* Distinguish card titles with the accent color and spacing. */
    color: #6a5acd;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

/* .card ul and its list items: display material names with check marks. */
.card ul {
    /* Remove default list markers and indentation inside cards. */
    list-style: none;
    padding-left: 0;
}

.card ul li {
    /* Space material entries and leave room for the custom check mark. */
    padding: 0.5rem 0;
    color: #5a6570;
    position: relative;
    padding-left: 1.5rem;
}

.card ul li:before {
    /* Add a gold check mark before each material entry. */
    content: "✓";
    position: absolute;
    left: 0;
    color: #d4af37;
    font-weight: bold;
}
/* End: Grid and card styles. */

/* Start: Footer appearance and contact card spacing. */
footer {
    /* Use a dark centered footer with contrast and a gold top border. */
    background: linear-gradient(135deg, #3d4852 0%, #495761 100%);
    color: #f0f2f5;
    text-align: center;
    padding: 2rem;
    border-top: 3px solid #d4af37;
}

/* .contact-card: constrain and center the contact information panel. */
.contact-card {
    /* Keep the company contact details centered in a compact card. */
    width: 100%;
    max-width: 800px;
    padding: 1.5rem;
    margin: 0 auto;
}

/* .inquiry-card: provide an independent panel for the inquiry form. */
.inquiry-card {
    /* Match the other cards while keeping this panel separate and stationary. */
    width: 100%;
    max-width: 2000px;
    margin: 1.5rem auto 0;
    padding: 1.5rem;
    border: 2px solid rgba(212, 175, 55, 0.12);
    border-radius: 20px;
    background: linear-gradient(145deg, #f8f9fb 0%, #eef0f4 100%);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
}

.inquiry-card h3 {
    /* Match the heading style used by the site's information cards. */
    margin-bottom: 1rem;
    color: #6a5acd;
    font-size: 1.5rem;
}

/* Keep the business address readable and visually separate from the form. */
.contact-address {
    margin-bottom: 1rem;
}

/* .contact-intro: add space above the contact invitation sentence. */
.contact-intro {
    /* Separate the inquiry invitation from the address above it. */
    margin-top: 1rem;
}

/* Start: Inquiry form field layout, controls, actions, and feedback. */
.inquiry-form {
    /* Arrange fields in two columns with consistent gaps. */
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem 1rem;
    margin-top: 1rem;
    position: relative;
}

.form-field {
    /* Keep each label and its input together in a vertical stack. */
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.form-field-full {
    /* Let message, notes, buttons, and status use the entire form width. */
    grid-column: 1 / -1;
}

.form-field label {
    /* Make field labels easy to distinguish from entered values. */
    color: #3d4852;
    font-weight: 600;
}

.form-field label span {
    /* Mark required fields using the existing gold accent. */
    color: #b8860b;
}

.form-field input,
.form-field select,
.form-field textarea {
    /* Give all controls a consistent size, border, and readable text. */
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid #b9c1cb;
    border-radius: 7px;
    background: #f8f9fb;
    color: #3d4852;
    font: inherit;
}

.form-field textarea {
    /* Allow a longer inquiry and let visitors resize it vertically. */
    min-height: 90px;
    resize: vertical;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    /* Make the currently selected field visible for keyboard and pointer users. */
    outline: 2px solid #6a5acd;
    outline-offset: 2px;
}

.form-note {
    /* Explain how to send drawings and photos without a backend upload. */
    margin: 0;
    font-size: 0.95rem;
}

.form-honeypot {
    /* Keep the anti-spam field available to bots but out of the visitor's view. */
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.form-response-frame {
    /* Receive the Apps Script response without navigating away from the site. */
    display: none;
}

.form-actions {
    /* Place the two send options side by side and allow wrapping on small screens. */
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.form-loading {
    /* Cover the form content with a soft overlay while a submission is pending. */
    display: none;
    position: absolute;
    inset: 0;
    z-index: 2;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    background: rgba(248, 249, 251, 0.82);
    border-radius: 8px;
    color: #3d4852;
    font-weight: 600;
}

.inquiry-form.is-submitting .form-loading {
    /* Show the centered loading indicator only during an active submission. */
    display: flex;
}

.form-spinner {
    /* Draw an animated ring to make the waiting state easy to recognize. */
    width: 28px;
    height: 28px;
    border: 3px solid rgba(106, 90, 205, 0.2);
    border-top-color: #6a5acd;
    border-radius: 50%;
    animation: form-spinner-rotate 0.8s linear infinite;
}

@keyframes form-spinner-rotate {
    to {
        transform: rotate(360deg);
    }
}

.contact-button {
    /* Style the WhatsApp action as the primary call to action. */
    border: 0;
    border-radius: 8px;
    padding: 0.8rem 1.1rem;
    background: #6a5acd;
    color: #fff;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
}

.contact-button:hover {
    /* Slightly darken the primary action on hover. */
    background: #5748b8;
}

.contact-button-secondary {
    /* Give the email action a distinct but matching secondary appearance. */
    background: #3d4852;
}

.contact-button-secondary:hover {
    /* Darken the secondary action on hover. */
    background: #2f3942;
}

.contact-button:focus-visible {
    /* Show a clear focus indicator when navigating with a keyboard. */
    outline: 2px solid #d4af37;
    outline-offset: 3px;
}

.contact-button:disabled {
    /* Indicate that the inquiry is being submitted and prevent repeat clicks. */
    opacity: 0.65;
    cursor: wait;
}

.form-status {
    /* Reserve space for success or setup messages displayed by JavaScript. */
    min-height: 1.5rem;
    margin: 0;
    color: #276749;
    text-align: center;
    font-weight: 600;
}

.form-status.error {
    /* Use a clear warning color when required contact settings are missing. */
    color: #b42318;
}

@media (prefers-reduced-motion: reduce) {
    /* Respect visitors who request reduced animation. */
    .form-spinner {
        animation-duration: 1.8s;
    }
}

.whatsapp-prompt {
    /* Separate the direct WhatsApp chat option from form submission. */
    margin: 1.5rem 0 0.5rem;
    font-weight: 600;
}

.whatsapp-link {
    /* Style the standalone WhatsApp link as an optional, direct contact action. */
    display: inline-block;
    color: #187a45;
    font-weight: 600;
    text-decoration: none;
}

.whatsapp-link:hover {
    /* Underline the chat link on hover without affecting the inquiry form. */
    text-decoration: underline;
}
/* End: Inquiry form styles. */
/* End: Footer and contact card styles. */

/* Start: Responsive navigation and layout adjustments for narrow screens. */
@media (max-width: 768px) {
    /* .nav-links and .menu-icon: show the collapsible side menu on phones. */
    .nav-links {
        /* Position the menu offscreen initially and size it as a side panel. */
        position: fixed;
        top: var(--nav-height);
        right: -260px;
        width: 250px;
        height: auto;
        max-height: 400px;
        /* Use a column layout, scroll when needed, and layer above content. */
        background: rgba(248, 249, 250, 0.98);
        flex-direction: column;
        align-items: flex-start;
        padding: 1.5rem;
        box-shadow: -5px 10px 30px rgba(0, 0, 0, 0.1);
        border-radius: 0 0 0 15px;
        border-left: 2px solid rgba(212, 175, 55, 0.3);
        border-bottom: 2px solid rgba(212, 175, 55, 0.3);
        overflow-y: auto;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        gap: 0;
        z-index: 999;
    }

    /* .nav-links.active: slide the mobile menu onscreen when it is open. */
    .nav-links.active {
        /* Slide the side panel into view when JavaScript adds the active class. */
        right: 0;
    }

    .nav-links li {
        /* Expand each navigation item to the menu width with vertical spacing. */
        width: 100%;
        margin-bottom: 0.5rem;
    }

    .nav-links a {
        /* Make each link an easy-to-tap panel on smaller screens. */
        display: block;
        padding: 0.8rem 1rem;
        border: 1px solid rgba(212, 175, 55, 0.2);
        border-radius: 8px;
        margin-bottom: 0.5rem;
        background: rgba(255, 255, 255, 0.5);
        opacity: 1;
        transform: translateX(0);
    }

    .nav-links a:hover {
        /* Strengthen the gold hover highlight in the mobile menu. */
        background: rgba(212, 175, 55, 0.15);
        border-color: rgba(212, 175, 55, 0.4);
    }

    .nav-links li:last-child a {
        /* Remove extra bottom spacing after the final menu link. */
        margin-bottom: 0;
    }

    nav.scrolled .nav-links {
        /* Keep the mobile menu available when the compact header is active. */
        display: flex;
    }

    nav.scrolled .menu-icon {
        /* Keep the menu toggle visible in the scrolled mobile header. */
        display: flex;
    }

    /* .menu-icon: keep the menu button visible on narrow screens. */
    .menu-icon {
        /* Show the menu toggle on small screens. */
        display: flex;
        margin-left: auto;
    }

    /* .hero and .grid: stack content vertically on narrow screens. */
    .hero {
        /* Stack hero content vertically and center it on narrow screens. */
        flex-direction: column;
        text-align: center;
    }

    .hero-text h1 {
        /* Reduce the heading size to fit narrow viewports. */
        font-size: 2rem;
    }

    .hero-text p {
        /* Reduce introduction text size on narrow viewports. */
        font-size: 1rem;
    }

    h2 {
        /* Reduce section headings on mobile for a better fit. */
        font-size: 2rem;
    }

    .grid {
        /* Put cards in a single column on narrow screens. */
        grid-template-columns: 1fr;
    }

    .inquiry-form {
        /* Stack contact fields on mobile for a comfortable form width. */
        grid-template-columns: 1fr;
    }
}
/* End: Responsive mobile layout. */

@media (max-width: 480px) {
    .logo-text,
    .logo-img {
        left: 1rem;
    }

    .logo-text {
        max-width: calc(100vw - 6rem);
        font-size: 0.95rem;
    }

    nav {
        padding-right: 1rem;
        padding-left: 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    nav,
    .logo-text,
    .logo-img,
    .nav-links {
        transition-duration: 0.01ms;
    }
}