/* ==========================================================
   Strategic Gearbox & Diff Centre
   Version 1.1 — Stabilised Foundation
   Developed by Freelance Studio
========================================================== */

:root {
    --primary: #18c7d1;
    --primary-dark: #12a8b2;
    --dark: #0f1115;
    --dark-deep: #0a0d11;
    --dark-grey: #1a1f26;
    --panel: #1f2630;
    --muted: #a7adb5;
    --white: #ffffff;
    --header-height: 90px;
    --container: 1200px;
    --section-space: clamp(5rem, 9vw, 7.5rem);
    --transition: 220ms ease;
    --shadow: 0 12px 35px rgba(0, 0, 0, 0.14);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 1rem);
}

body {
    min-width: 320px;
    overflow-x: hidden;
    background: var(--dark);
    color: var(--white);
    font-family: "Poppins", sans-serif;
    line-height: 1.7;
}

body.menu-open {
    overflow: hidden;
}

img {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    color: inherit;
    font: inherit;
}

ul {
    list-style: none;
}

h1,
h2,
h3 {
    font-family: "Bebas Neue", sans-serif;
    font-weight: 400;
    letter-spacing: 0.04em;
    line-height: 1.05;
}

p {
    color: var(--muted);
}

.container {
    width: min(90%, var(--container));
    margin-inline: auto;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: fixed;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 2000;
    padding: 0.75rem 1rem;
    transform: translateY(-150%);
    background: var(--primary);
    color: #071013;
    font-weight: 700;
    transition: transform var(--transition);
}

.skip-link:focus {
    transform: translateY(0);
}

:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 4px;
}

section[id] {
    scroll-margin-top: calc(var(--header-height) + 1rem);
}

/* Header and navigation */
.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid rgba(15, 17, 21, 0.06);
    transition: box-shadow var(--transition), background var(--transition);
}

.site-header.scrolled {
    background: var(--white);
    box-shadow: var(--shadow);
}

.navbar {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: var(--header-height);
}

.logo {
    display: inline-flex;
    align-items: center;
    flex: 0 1 19rem;
    max-width: 19rem;
}

.logo img {
    width: auto;
    height: 70px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: clamp(1.5rem, 3vw, 2.25rem);
}

.nav-links a {
    position: relative;
    display: inline-block;
    padding-block: 0.5rem;
    color: #22272e;
    font-size: 0.94rem;
    font-weight: 600;
    transition: color var(--transition);
}

.nav-links a::after {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 3px;
    content: "";
    transform: scaleX(0);
    transform-origin: right;
    background: var(--primary);
    transition: transform var(--transition);
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a.active {
    color: var(--primary-dark);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after,
.nav-links a.active::after {
    transform: scaleX(1);
    transform-origin: left;
}

.menu-toggle {
    display: none;
    width: 48px;
    height: 48px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    border: 1px solid rgba(15, 17, 21, 0.16);
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
}

.menu-toggle > span:not(.sr-only) {
    width: 22px;
    height: 2px;
    background: var(--dark);
    transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle[aria-expanded="true"] > span:nth-of-type(2) {
    transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] > span:nth-of-type(3) {
    opacity: 0;
}

.menu-toggle[aria-expanded="true"] > span:nth-of-type(4) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
    position: relative;
    display: grid;
    min-height: 100vh;
    min-height: 100svh;
    align-items: center;
    padding: calc(var(--header-height) + 5rem) 0 6rem;
    isolation: isolate;
    background: var(--dark) url("Web Files/hero-bg.png") center right / cover no-repeat;
}

.hero::before {
    position: absolute;
    z-index: -1;
    inset: 0;
    content: "";
    background:
        linear-gradient(90deg,
            rgba(15, 17, 21, 0.99) 0%,
            rgba(15, 17, 21, 0.96) 42%,
            rgba(15, 17, 21, 0.76) 68%,
            rgba(15, 17, 21, 0.48) 100%),
        linear-gradient(0deg, rgba(15, 17, 21, 0.35), rgba(15, 17, 21, 0.35));
}

.hero-content {
    max-width: 48rem;
}

.eyebrow {
    margin-bottom: 1rem;
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.hero h1 {
    max-width: 48rem;
    margin-bottom: 1.5rem;
    font-size: clamp(3.5rem, 7vw, 5.75rem);
}

.hero h1::after {
    display: block;
    width: 5rem;
    height: 4px;
    margin-top: 1.5rem;
    content: "";
    background: var(--primary);
}

.hero-intro {
    max-width: 43rem;
    color: #d7dce2;
    font-size: clamp(1rem, 1.5vw, 1.16rem);
}

/* Shared sections */
.content-section,
.brands {
    padding-block: var(--section-space);
}

.content-section {
    background: var(--dark);
}

.content-section:nth-of-type(even) {
    background: #12161c;
}

.section-heading {
    max-width: 43rem;
}

.section-heading-centered {
    margin: 0 auto 3.25rem;
    text-align: center;
}

.section-heading h2 {
    font-size: clamp(2.8rem, 5vw, 4.25rem);
}

/* Specialist brands */
.brands {
    background: #161b22;
}

.brand-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
}

.brand-card {
    display: grid;
    min-height: 7.75rem;
    place-items: center;
    padding: 2rem 1.25rem;
    border: 1px solid rgba(255, 255, 255, 0.07);
    background: var(--panel);
    font-size: clamp(1rem, 2vw, 1.15rem);
    font-weight: 700;
    letter-spacing: 0.12em;
    text-align: center;
    text-transform: uppercase;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.brand-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: 0 18px 30px rgba(0, 0, 0, 0.2);
}

/* About */
.about-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(3rem, 8vw, 7rem);
    align-items: start;
}

.about-copy {
    padding-left: 2rem;
    border-left: 3px solid var(--primary);
}

.about-copy p + p {
    margin-top: 1.25rem;
}

/* Services */
.services {
    background: #12161c;
}

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

.service-card {
    position: relative;
    min-height: 18rem;
    padding: 2.5rem;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: linear-gradient(145deg, #1b2129, #151a20);
    transition: border-color var(--transition), transform var(--transition);
}

.service-card::after {
    position: absolute;
    right: 0;
    bottom: 0;
    width: 4rem;
    height: 4px;
    content: "";
    background: var(--primary);
    transition: width var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: rgba(24, 199, 209, 0.65);
}

.service-card:hover::after {
    width: 100%;
}

.service-number {
    display: block;
    margin-bottom: 2.75rem;
    color: var(--primary);
    font-family: "Bebas Neue", sans-serif;
    font-size: 1.35rem;
    letter-spacing: 0.1em;
}

.service-card h3 {
    margin-bottom: 1rem;
    font-size: clamp(1.9rem, 3vw, 2.5rem);
}

.service-card p {
    max-width: 32rem;
}

/* Gallery placeholder */
.pending-panel {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    align-items: center;
    max-width: 58rem;
    margin-inline: auto;
    padding: clamp(2rem, 5vw, 3.5rem);
    border: 1px dashed rgba(24, 199, 209, 0.55);
    background: rgba(31, 38, 48, 0.72);
}

.pending-icon {
    display: grid;
    width: 6rem;
    height: 6rem;
    place-items: center;
    border: 2px solid var(--primary);
    border-radius: 50%;
    color: var(--primary);
    font-family: "Bebas Neue", sans-serif;
    font-size: 2rem;
    letter-spacing: 0.08em;
}

.pending-panel h3 {
    margin-bottom: 0.65rem;
    font-size: clamp(1.7rem, 3vw, 2.25rem);
}

/* Contact */
.contact {
    background: var(--dark-grey);
}

.contact-panel {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(3rem, 8vw, 7rem);
    align-items: center;
}

.contact-copy {
    padding: clamp(1.75rem, 4vw, 2.5rem);
    border-left: 3px solid var(--primary);
    background: rgba(255, 255, 255, 0.03);
}

.status-note {
    margin-top: 0.75rem;
    color: #d5dae0;
    font-weight: 500;
}

/* Footer */
.site-footer {
    padding-block: 2.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    background: var(--dark-deep);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 1rem 2rem;
}

.site-footer p {
    color: #8f969f;
    font-size: 0.88rem;
}

.site-footer strong {
    color: #bdc3ca;
}

/* Responsive navigation and layout */
@media (max-width: 992px) {
    :root {
        --header-height: 80px;
    }

    .logo {
        max-width: 15rem;
    }

    .logo img {
        height: 60px;
    }

    .js .menu-toggle {
        display: flex;
    }

    .js .nav-links {
        position: absolute;
        top: calc(100% + 1px);
        right: 0;
        display: grid;
        width: min(23rem, 90vw);
        gap: 0;
        transform: translateY(-0.75rem);
        visibility: hidden;
        opacity: 0;
        border: 1px solid rgba(15, 17, 21, 0.08);
        background: var(--white);
        box-shadow: var(--shadow);
        pointer-events: none;
        transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
    }

    .js .nav-links.is-open {
        transform: translateY(0);
        visibility: visible;
        opacity: 1;
        pointer-events: auto;
    }

    .nav-links a {
        display: block;
        padding: 1rem 1.25rem;
        border-bottom: 1px solid rgba(15, 17, 21, 0.07);
    }

    .nav-links li:last-child a {
        border-bottom: 0;
    }

    .nav-links a::after {
        top: 0;
        right: auto;
        bottom: 0;
        width: 3px;
        height: auto;
        transform: scaleY(0);
    }

    .nav-links a:hover::after,
    .nav-links a:focus-visible::after,
    .nav-links a.active::after {
        transform: scaleY(1);
    }

    .no-js .site-header {
        position: static;
    }

    .no-js .navbar,
    .no-js .nav-links {
        flex-wrap: wrap;
    }

    .no-js .nav-links {
        width: 100%;
    }

    .hero {
        background-position: 58% center;
    }

    .hero::before {
        background: rgba(15, 17, 21, 0.88);
    }

    .about-grid,
    .contact-panel {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .brand-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 700px) {
    .hero {
        min-height: 44rem;
        padding-bottom: 5rem;
        text-align: center;
    }

    .hero h1 br {
        display: none;
    }

    .hero h1::after {
        margin-inline: auto;
    }

    .brand-grid,
    .service-grid {
        grid-template-columns: 1fr;
    }

    .brand-card {
        min-height: 6.5rem;
    }

    .service-card {
        min-height: 0;
    }

    .pending-panel {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .pending-icon {
        margin-inline: auto;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 430px) {
    .container {
        width: min(92%, var(--container));
    }

    .logo {
        max-width: 12.75rem;
    }

    .logo img {
        height: 52px;
    }

    .hero h1 {
        font-size: 3.1rem;
    }

    .service-card {
        padding: 2rem;
    }
}

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

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}