/* =========================================================================
   BENTLEY MOTORS - CSS DESIGN SYSTEM & STYLES
   ========================================================================= */

:root {
    /* Color Palette */
    --clr-black: #050505;
    --clr-white: #ffffff;
    --clr-bentley-green: #394D45;
    --clr-bentley-green-light: #4A6359;
    --clr-bentley-green-dark: #2A3933;
    --clr-gold: #BC9554;
    --clr-gold-dark: #9A7840;
    --clr-gray-light: #F4F4F4;
    --clr-gray-text: #666666;
    --clr-gray-dark: #333333;

    /* Typography */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Outfit', sans-serif;

    /* Spacing */
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;

    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-slow: 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* =========================================================================
   GLOBAL RESET & TYPOGRAPHY
   ========================================================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--clr-gray-dark);
    background-color: var(--clr-white);
    overflow-x: hidden;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: 400;
}

.serif-heading {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3.5rem);
    letter-spacing: 1px;
}

.main-heading {
    font-family: var(--font-body);
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: 4px;
    font-weight: 300;
    margin-bottom: 2rem;
}

.body-text {
    font-size: 1.1rem;
    color: var(--clr-gray-text);
    max-width: 800px;
    margin: 0 auto 2rem auto;
    font-weight: 300;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 3px;
    font-size: 0.85rem;
    display: block;
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

/* =========================================================================
   BUTTONS
   ========================================================================= */
.btn-group {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 0.85rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    border: 1px solid transparent;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

/* Hover effect via pseudo-element */
.btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background-color: rgba(255, 255, 255, 0.1);
    transition: all 0.4s ease;
    z-index: -1;
}

.btn:hover::after {
    height: 100%;
}

.btn-primary {
    background-color: var(--clr-bentley-green);
    color: var(--clr-white);
    border-color: var(--clr-bentley-green);
}

.btn-primary:hover {
    background-color: var(--clr-bentley-green-dark);
}

.btn-secondary {
    background-color: transparent;
    color: var(--clr-gray-dark);
    border-color: var(--clr-gray-dark);
}

.btn-secondary:hover {
    background-color: var(--clr-gray-light);
}

.btn-secondary::after {
    background-color: rgba(0, 0, 0, 0.05);
}

.btn-outline {
    background-color: transparent;
    color: var(--clr-bentley-green);
    border-color: var(--clr-bentley-green);
}

.btn-outline:hover {
    background-color: var(--clr-bentley-green);
    color: var(--clr-white);
}

.btn-dark {
    background-color: var(--clr-black);
    color: var(--clr-white);
    border-color: var(--clr-black);
}

.btn-dark:hover {
    background-color: #222;
}

/* =========================================================================
   HEADER / NAVBAR
   ========================================================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 90px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 4%;
    z-index: 1000;
    transition: var(--transition-fast);
    animation: slideDown 1s ease-out forwards;
}

.navbar.has-glass {
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0));
    color: var(--clr-white);
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    height: 70px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    color: var(--clr-white);
}

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

.nav-item {
    font-size: 0.75rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    position: relative;
    padding: 5px 0;
    font-weight: 400;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 1px;
    background-color: var(--clr-white);
    transition: var(--transition-fast);
}

.nav-item:hover::after {
    width: 100%;
}

.nav-logo img {
    height: 40px;
    transition: var(--transition-fast);
}

.navbar.scrolled .nav-logo img {
    height: 30px;
}

.nav-btn {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.5);
    padding: 10px 20px;
    color: var(--clr-white);
    cursor: pointer;
    font-size: 0.75rem;
    letter-spacing: 2px;
    transition: var(--transition-fast);
}

.nav-btn a {
    color: var(--clr-white);
}

.nav-btn:hover {
    background: var(--clr-white);
    color: var(--clr-black);
}

.nav-btn:hover a {
    color: var(--clr-black);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background-color: var(--clr-white);
    transition: var(--transition-fast);
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
    }

    to {
        transform: translateY(0);
    }
}

/* =========================================================================
   HERO SECTION
   ========================================================================= */
.hero-section {
    position: relative;
    height: 100vh;
    width: 100%;
    background-color: var(--clr-black);
    overflow: hidden;
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    animation: videoFadeIn 2s ease 1s forwards;
    transform: scale(1.05);
    /* initial slight zoom */
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.6), transparent 50%, rgba(0, 0, 0, 0.3));
    pointer-events: none;
}

@keyframes videoFadeIn {
    to {
        opacity: 0.85;
        transform: scale(1);
    }
}

/* =========================================================================
   INTRO SECTION
   ========================================================================= */
.intro-section {
    padding: var(--space-xl) 5%;
    text-align: center;
    background-color: var(--clr-white);
}

.intro-content {
    max-width: 1000px;
    margin: 0 auto;
}

/* =========================================================================
   MODELS GRID
   ========================================================================= */
.models-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    width: 100%;
    background-color: var(--clr-black);
}

.grid-card {
    position: relative;
    height: 60vh;
    min-height: 400px;
    overflow: hidden;
    cursor: pointer;
}

.card-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform 0.8s ease;
}

.grid-card:hover .card-bg {
    transform: scale(1.05);
}

.grid-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.2) 60%, transparent 100%);
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.grid-card:hover::after {
    opacity: 0.95;
}

.card-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: var(--space-md);
    z-index: 2;
    color: var(--clr-white);
    transform: translateY(20px);
    transition: var(--transition-fast);
}

.grid-card:hover .card-content {
    transform: translateY(0);
}

.card-content h2 {
    font-size: 1.8rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-family: var(--font-heading);
}

.card-content p {
    font-size: 0.95rem;
    opacity: 0.9;
    font-weight: 300;
}

/* =========================================================================
   FEATURE SPLIT & PARALLAX
   ========================================================================= */
.feature-split {
    display: flex;
    height: 80vh;
    min-height: 600px;
    width: 100%;
    background-color: var(--clr-white);
}

.feature-split.reverse {
    flex-direction: row-reverse;
}

.split-image {
    flex: 1;
    background-size: cover;
    background-position: center;
    position: relative;
}

.split-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    background-color: var(--clr-gray-light);
}

.content-box {
    max-width: 450px;
    padding: var(--space-md);
}

.dark-theme {
    background-color: var(--clr-black);
    color: var(--clr-white);
    box-shadow: -20px 20px 0 var(--clr-bentley-green);
    transform: translateX(-50px);
    position: relative;
    z-index: 2;
}

.gold-theme {
    background-color: var(--clr-white);
    color: var(--clr-gray-dark);
    box-shadow: 20px 20px 0 var(--clr-gold);
    transform: translateX(50px);
    position: relative;
    z-index: 2;
}

.content-box h2 {
    margin-bottom: 1.5rem;
}

.content-box p {
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.8;
}

/* =========================================================================
   ABOUT JOURNEY
   ========================================================================= */
.about-journey {
    padding: var(--space-xl) 5%;
    background-color: var(--clr-white);
}

.journey-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.journey-image {
    flex: 1;
}

.journey-image img {
    width: 100%;
    height: auto;
    border-radius: 4px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.journey-text {
    flex: 1;
}

.journey-text p {
    font-size: 1.1rem;
    color: var(--clr-gray-text);
    margin-bottom: 2rem;
}

/* =========================================================================
   FOOTER
   ========================================================================= */
.site-footer {
    background-color: var(--clr-white);
    padding: var(--space-lg) 5% var(--space-md) 5%;
    border-top: 1px solid var(--clr-gray-light);
    text-align: center;
}

.footer-top {
    margin-bottom: var(--space-md);
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.footer-links>a:not(.footer-logo) {
    font-size: 0.75rem;
    letter-spacing: 1px;
    color: var(--clr-gray-dark);
    font-weight: 500;
}

.footer-links>a:not(.footer-logo):hover {
    color: var(--clr-bentley-green);
}

.footer-logo img {
    height: 48px;
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin: var(--space-md) 0;
}

.social-icons img {
    height: 24px;
    width: 24px;
    object-fit: contain;
    transition: transform var(--transition-fast);
    filter: invert(0.2);
}

.social-icons a:hover img {
    transform: translateY(-3px);
    filter: invert(0);
}

.footer-bottom {
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--clr-gray-light);
}

.copyright {
    font-size: 0.85rem;
    color: var(--clr-gray-text);
    margin-bottom: 1rem;
}

.legal-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.legal-links a {
    font-size: 0.75rem;
    color: var(--clr-gray-text);
    text-transform: uppercase;
}

.legal-links a:hover {
    color: var(--clr-black);
    text-decoration: underline;
}

.registered {
    font-size: 0.7rem;
    color: #999;
}

/* =========================================================================
   ANIMATIONS UTILITIES
   ========================================================================= */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all var(--transition-slow);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 {
    transition-delay: 0.1s;
}

.delay-2 {
    transition-delay: 0.3s;
}

.delay-3 {
    transition-delay: 0.5s;
}

/* =========================================================================
   MEDIA QUERIES FOR RESPONSIVENESS
   ========================================================================= */

/* LAPTOP (max-width: 1200px) */
@media (max-width: 1200px) {
    .nav-links {
        gap: 1rem;
    }
}

/* TABLET (max-width: 1024px) */
@media (max-width: 1024px) {
    .nav-links {
        display: none;
        /* Hide standard nav */
    }

    .hamburger {
        display: flex;
    }

    .navbar.mobile-active {
        background: rgba(0, 0, 0, 0.98);
        height: 100vh;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        backdrop-filter: blur(15px);
    }

    .navbar.mobile-active .nav-links {
        display: flex;
        flex-direction: column;
        margin: 2rem 0;
        gap: 2rem;
    }

    .navbar.mobile-active .nav-item {
        font-size: 1.2rem;
    }

    .hamburger.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

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

    /* Third item spans full width in 2-column grid */
    .grid-card:nth-child(3) {
        grid-column: 1 / -1;
    }

    .feature-split,
    .feature-split.reverse {
        flex-direction: column;
        height: auto;
    }

    .split-image {
        height: 50vh;
        width: 100%;
    }

    .split-content {
        padding: var(--space-md) 5%;
    }

    .dark-theme,
    .gold-theme {
        transform: translateX(0);
        margin-top: -50px;
        max-width: 90%;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    }

    .journey-container {
        flex-direction: column;
        text-align: left;
    }
}

/* MOBILE (max-width: 768px) */
@media (max-width: 768px) {
    .models-grid {
        grid-template-columns: 1fr;
    }

    .grid-card:nth-child(3) {
        grid-column: 1;
    }

    .grid-card {
        height: 45vh;
    }

    .btn-group {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .journey-text {
        text-align: center;
    }

    .journey-text .btn-group {
        justify-content: center !important;
    }

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

    .footer-logo {
        order: -1;
        margin-bottom: 1rem;
    }

    .legal-links {
        flex-direction: column;
        gap: 1rem;
    }
}

/* SMALL MOBILE (max-width: 480px) */
@media (max-width: 480px) {
    .content-box {
        padding: var(--space-md);
        margin-top: -30px;
    }

    .hero-video {
        height: 100vh;
        object-fit: cover;
    }
}