:root {
    --bg-primary: #060a14;
    --bg-secondary: #0c1222;
    --bg-tertiary: #111b30;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-glass: rgba(255, 255, 255, 0.06);
    --text-primary: #eaf1ff;
    --text-secondary: #8b9cc0;
    --text-muted: #6b7fa3;
    --accent: #4cc9f0;
    --accent-light: #61dafb;
    --accent-dark: #3aa8d0;
    --accent-2: #9d4edd;
    --accent-3: #f72585;
    --success: #22c55e;
    --warning: #facc15;
    --gradient-primary: linear-gradient(135deg, var(--accent), var(--accent-2));
    --gradient-accent: linear-gradient(135deg, var(--accent), var(--accent-light));
    --gradient-dark: linear-gradient(135deg, #0f172a, #1e293b);
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(76, 201, 240, 0.3);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 12px 35px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 25px 50px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px rgba(76, 201, 240, 0.2);
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --container: 1280px;
    --header-height: 72px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-primary);
    background: var(--bg-primary);
    background-image:
        radial-gradient(ellipse 80% 60% at 50% -20%, rgba(76, 201, 240, 0.08), transparent),
        radial-gradient(ellipse 60% 50% at 80% 50%, rgba(157, 78, 221, 0.06), transparent),
        radial-gradient(ellipse 60% 50% at 20% 80%, rgba(247, 37, 133, 0.04), transparent);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: rgba(76, 201, 240, 0.3);
    color: #fff;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--accent), var(--accent-2));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

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

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

button {
    border: none;
    background: transparent;
    cursor: pointer;
    font-family: inherit;
}

.container {
    width: min(100% - 3rem, var(--container));
    margin-inline: auto;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 3px;
    font-size: 0.7rem;
    color: var(--accent);
    margin-bottom: 0.75rem;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
}

.section {
    padding: 7rem 0;
    position: relative;
}

.section-title {
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    text-align: center;
    margin-bottom: 0.6rem;
    font-family: 'Playfair Display', serif;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    font-size: 1.05rem;
}

/* ========== Preloader ========== */
.preloader {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 10000;
    display: grid;
    place-items: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.loaded {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.preloader-inner {
    text-align: center;
}

.preloader-logo {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
    animation: pulse 1.5s ease-in-out infinite;
}

.preloader-logo i {
    display: inline-block;
}

.preloader-bar {
    width: 200px;
    height: 3px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
}

.preloader-progress {
    height: 100%;
    width: 0%;
    background: var(--gradient-primary);
    border-radius: 3px;
    animation: preloaderProgress 1.8s ease-out forwards;
}

@keyframes preloaderProgress {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

/* ========== Scroll Progress ========== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0%;
    background: var(--gradient-primary);
    z-index: 10001;
    transition: width 0.1s linear;
}

/* ========== Back to Top ========== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    color: var(--text-primary);
    display: grid;
    place-items: center;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
    transform: translateY(-3px);
}

/* ========== Header / Navbar ========== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0.75rem 0;
    transition: var(--transition);
}

.site-header.scrolled {
    padding: 0.4rem 0;
    background: rgba(6, 10, 20, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

#navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.7rem 1.4rem;
    background: rgba(8, 12, 24, 0.5);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    backdrop-filter: blur(14px);
    transition: var(--transition);
}

.site-header.scrolled #navbar {
    background: rgba(8, 12, 24, 0.8);
    box-shadow: var(--shadow-md);
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: 0.3px;
}

.logo i {
    color: var(--accent);
    font-size: 1.3rem;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.88rem;
    padding: 0.45rem 0.7rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
    white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    background: rgba(76, 201, 240, 0.08);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    gap: 5px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.menu-toggle:hover {
    background: rgba(255, 255, 255, 0.05);
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
    transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========== Hero ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: grid;
    place-items: center;
    overflow: hidden;
    padding: 6rem 0 4rem;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(6, 10, 20, 0.3) 0%, rgba(6, 10, 20, 0.7) 50%, var(--bg-primary) 100%),
        url("https://images.unsplash.com/photo-1493238792000-8113da705763?q=80&w=2000&auto=format&fit=crop") center/cover no-repeat;
    transform: scale(1.05);
    will-change: transform;
    z-index: -2;
}

.hero-particles {
    position: absolute;
    inset: 0;
    z-index: -1;
    overflow: hidden;
}

.hero-particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0;
    animation: floatParticle 6s ease-in-out infinite;
}

@keyframes floatParticle {
    0%, 100% { opacity: 0; transform: translateY(0) scale(0.5); }
    25% { opacity: 0.6; }
    50% { opacity: 0.3; transform: translateY(-120px) scale(1); }
    75% { opacity: 0.1; }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.eyebrow {
    display: inline-block;
}

.hero h1 {
    font-size: clamp(2.2rem, 5.5vw, 4.5rem);
    max-width: 1000px;
    margin: 0 auto 1.4rem;
    line-height: 1.1;
}

.hero h1 span {
    background: linear-gradient(135deg, var(--accent), var(--accent-light), var(--accent-2));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: gradientShift 4s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-text {
    max-width: 780px;
    margin: 0 auto;
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
}

.hero-actions {
    margin-top: 2.5rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    border-radius: 999px;
    padding: 0.85rem 1.6rem;
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: translateX(-100%);
    transition: transform 0.5s ease;
}

.btn:hover::before {
    transform: translateX(100%);
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--bg-primary);
    box-shadow: 0 4px 20px rgba(76, 201, 240, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(76, 201, 240, 0.45);
}

.btn-ghost {
    border-color: var(--border);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
}

.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(76, 201, 240, 0.05);
    transform: translateY(-3px);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-muted);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    animation: fadeInUp 1s ease 1.5s both;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, var(--accent), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0%, 100% { transform: scaleY(1); opacity: 1; }
    50% { transform: scaleY(0.5); opacity: 0.3; }
}

/* ========== Marquee ========== */
.marquee-section {
    padding: 1.5rem 0;
    overflow: hidden;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.marquee-track {
    display: flex;
    animation: marquee 35s linear infinite;
    width: max-content;
}

.marquee-content {
    display: flex;
    gap: 3rem;
    padding: 0 1.5rem;
    align-items: center;
}

.marquee-content span {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-muted);
    white-space: nowrap;
    position: relative;
    transition: var(--transition);
}

.marquee-content span:hover {
    color: var(--accent);
}

.marquee-content span::after {
    content: '';
    position: absolute;
    right: -1.6rem;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 4px;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0.5;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ========== Timeline ========== */
.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent), var(--accent-2), transparent);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 0 3rem 3rem;
}

.timeline-item:nth-child(odd) {
    padding-right: 3.5rem;
    text-align: right;
    margin-left: 0;
}

.timeline-item:nth-child(even) {
    padding-left: 3.5rem;
    margin-left: 50%;
}

.timeline-dot {
    position: absolute;
    top: 0.5rem;
    width: 16px;
    height: 16px;
    background: var(--bg-primary);
    border: 3px solid var(--accent);
    border-radius: 50%;
    z-index: 2;
    transition: var(--transition);
}

.timeline-item:nth-child(odd) .timeline-dot {
    right: -8px;
}

.timeline-item:nth-child(even) .timeline-dot {
    left: -8px;
}

.timeline-item:hover .timeline-dot {
    background: var(--accent);
    box-shadow: 0 0 20px rgba(76, 201, 240, 0.5);
    transform: scale(1.3);
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.4rem;
    transition: var(--transition);
}

.timeline-item:hover .timeline-content {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.year {
    display: inline-block;
    margin-bottom: 0.5rem;
    color: var(--accent);
    font-weight: 800;
    font-size: 1.1rem;
    font-family: 'Playfair Display', serif;
}

.timeline-content h3 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
}

/* ========== Legendary Cars ========== */
.legendary-section {
    background: linear-gradient(180deg, transparent, var(--bg-secondary), transparent);
}

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

.legendary-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.legendary-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.legendary-img {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.legendary-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.legendary-card:hover .legendary-img img {
    transform: scale(1.08);
}

.legendary-year {
    position: absolute;
    bottom: 0.75rem;
    right: 0.75rem;
    background: rgba(6, 10, 20, 0.85);
    backdrop-filter: blur(10px);
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
    border: 1px solid var(--border);
}

.legendary-info {
    padding: 1.2rem;
}

.legendary-info h3 {
    font-size: 1.1rem;
    margin-bottom: 0.4rem;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
}

.legendary-info p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.legendary-specs {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--accent);
}

.legendary-specs i {
    margin-right: 0.25rem;
}

/* ========== Brands ========== */
.brands-section {
    background: linear-gradient(180deg, var(--bg-secondary), transparent);
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.2rem;
}

.glass-card {
    padding: 1.5rem;
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.glass-card:hover::before {
    transform: scaleX(1);
}

.glass-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

.brand-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
    background: rgba(76, 201, 240, 0.1);
    display: grid;
    place-items: center;
    margin-bottom: 1rem;
    font-size: 1.3rem;
    color: var(--accent);
    transition: var(--transition);
}

.glass-card:hover .brand-icon {
    background: var(--accent);
    color: var(--bg-primary);
    transform: scale(1.1);
}

.glass-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
}

.glass-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.65;
    margin-bottom: 0.75rem;
}

.brand-origin {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ========== Technology ========== */
.tech-section {
    background: linear-gradient(180deg, transparent, var(--bg-secondary), transparent);
}

.tech-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-bottom: 3rem;
}

.tech-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
}

.tech-image img {
    width: 100%;
    height: 450px;
    object-fit: cover;
    transition: var(--transition-slow);
}

.tech-image:hover img {
    transform: scale(1.03);
}

.tech-image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1.2rem;
    background: linear-gradient(transparent, rgba(6, 10, 20, 0.9));
    display: flex;
    justify-content: flex-end;
}

.tech-image-overlay span {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    border: 1px solid var(--border);
}

.tech-image-overlay i {
    margin-right: 0.4rem;
}

.tech-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    line-height: 1.3;
}

.tech-content > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.progress-item {
    margin-bottom: 1.2rem;
}

.progress-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    font-size: 0.88rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.progress-head span {
    color: var(--text-secondary);
}

.progress-head i {
    margin-right: 0.4rem;
    color: var(--accent);
}

.progress-head strong {
    color: var(--accent);
    font-size: 0.95rem;
}

.progress-track {
    height: 8px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 999px;
    overflow: hidden;
}

.progress-bar {
    display: block;
    height: 100%;
    width: 0;
    border-radius: inherit;
    background: var(--gradient-primary);
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.tech-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.2rem;
}

.tech-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: var(--transition);
    text-align: center;
}

.tech-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

.tech-card-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(76, 201, 240, 0.1);
    display: grid;
    place-items: center;
    margin: 0 auto 1rem;
    font-size: 1.3rem;
    color: var(--accent);
    transition: var(--transition);
}

.tech-card:hover .tech-card-icon {
    background: var(--accent);
    color: var(--bg-primary);
    transform: scale(1.15) rotate(10deg);
}

.tech-card h4 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
}

.tech-card p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

/* ========== Categories ========== */
.categories-section {
    background: linear-gradient(180deg, var(--bg-secondary), transparent);
}

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

.category-card {
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-card);
    transition: var(--transition);
}

.category-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
}

.category-img {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.category-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.category-card:hover .category-img img {
    transform: scale(1.08);
}

.category-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(transparent 40%, rgba(6, 10, 20, 0.8));
}

.category-info {
    padding: 1.3rem;
}

.category-tag {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    background: rgba(76, 201, 240, 0.12);
    color: var(--accent);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.6rem;
}

.category-info h3 {
    font-size: 1.1rem;
    margin-bottom: 0.4rem;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
}

.category-info p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

/* ========== Comparison ========== */
.comparison-section {
    background: linear-gradient(180deg, transparent, var(--bg-secondary), transparent);
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.comparison-card {
    border-radius: var(--radius-md);
    padding: 1.8rem;
    border: 1px solid var(--border);
    background: var(--bg-card);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.comparison-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.compare-past::before {
    background: linear-gradient(90deg, var(--text-muted), var(--text-secondary));
}

.compare-present::before {
    background: var(--gradient-accent);
}

.compare-future::before {
    background: linear-gradient(90deg, var(--accent-2), var(--accent-3));
}

.comparison-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.comparison-header {
    text-align: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.comparison-header i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: block;
}

.compare-past .comparison-header i {
    color: var(--text-secondary);
}

.compare-present .comparison-header i {
    color: var(--accent);
}

.compare-future .comparison-header i {
    color: var(--accent-2);
}

.comparison-header h3 {
    font-size: 1.3rem;
    font-family: 'Playfair Display', serif;
    font-weight: 800;
}

.comparison-header span {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}

.comparison-card ul {
    list-style: none;
}

.comparison-card li {
    padding: 0.5rem 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
}

.comparison-card li i {
    color: var(--success);
    margin-top: 0.25rem;
    font-size: 0.75rem;
    flex-shrink: 0;
}

/* ========== Future ========== */
.future-section {
    position: relative;
    overflow: hidden;
}

.future-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        linear-gradient(180deg, var(--bg-primary) 0%, rgba(6, 10, 20, 0.85) 30%, rgba(6, 10, 20, 0.9) 70%, var(--bg-primary) 100%),
        url("https://images.unsplash.com/photo-1503376780353-7e6692767b70?q=80&w=2000&auto=format&fit=crop") center/cover no-repeat;
}

.future-content {
    position: relative;
    z-index: 1;
}

.future-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.future-card {
    padding: 1.8rem;
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    backdrop-filter: blur(14px);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.future-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

.future-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    background: rgba(76, 201, 240, 0.1);
    display: grid;
    place-items: center;
    margin-bottom: 1rem;
    font-size: 1.4rem;
    color: var(--accent);
    transition: var(--transition);
}

.future-card:hover .future-icon {
    background: var(--gradient-primary);
    color: var(--bg-primary);
    transform: scale(1.1) rotate(-5deg);
}

.future-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.6rem;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
}

.future-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ========== Stats ========== */
.stats-section {
    background: linear-gradient(180deg, transparent, var(--bg-secondary), transparent);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    border-radius: var(--radius-md);
    padding: 1.8rem;
    text-align: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(76, 201, 240, 0.05), transparent 60%);
    opacity: 0;
    transition: var(--transition-slow);
}

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

.stat-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(76, 201, 240, 0.1);
    display: grid;
    place-items: center;
    margin: 0 auto 1rem;
    font-size: 1.2rem;
    color: var(--accent);
}

.counter {
    font-size: clamp(2rem, 4vw, 2.8rem);
    color: var(--accent);
    margin-bottom: 0.3rem;
    font-weight: 800;
    font-family: 'Inter', sans-serif;
}

.stat-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.5;
}

.facts {
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 1.8rem;
}

.facts h3 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
}

.facts h3 i {
    color: var(--warning);
    margin-right: 0.5rem;
}

.facts ul {
    list-style: none;
    display: grid;
    gap: 0.6rem;
}

.facts li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding-left: 1.2rem;
    position: relative;
    line-height: 1.6;
}

.facts li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.65rem;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
}

/* ========== Engine Evolution ========== */
.engine-section {
    background: linear-gradient(180deg, var(--bg-secondary), transparent);
}

.engine-timeline {
    max-width: 800px;
    margin: 0 auto;
}

.engine-step {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding: 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--bg-card);
    margin-bottom: 1rem;
    transition: var(--transition);
}

.engine-step:hover {
    border-color: var(--border-hover);
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.engine-step-number {
    font-size: 2.2rem;
    font-weight: 900;
    color: transparent;
    -webkit-text-stroke: 1px var(--accent);
    line-height: 1;
    flex-shrink: 0;
    font-family: 'Playfair Display', serif;
    transition: var(--transition);
}

.engine-step:hover .engine-step-number {
    -webkit-text-stroke-color: transparent;
    color: var(--accent);
}

.engine-step-content h4 {
    font-size: 1.1rem;
    margin-bottom: 0.4rem;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
}

.engine-step-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.65;
}

/* ========== FAQ ========== */
.faq-section {
    background: linear-gradient(180deg, transparent, var(--bg-secondary));
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
    overflow: hidden;
    background: var(--bg-card);
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--border-hover);
}

.faq-item.active {
    border-color: var(--accent);
    box-shadow: var(--shadow-glow);
}

.faq-question {
    width: 100%;
    padding: 1.2rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--accent);
}

.faq-question i {
    color: var(--accent);
    transition: var(--transition);
    font-size: 0.85rem;
    flex-shrink: 0;
    margin-left: 1rem;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 1.5rem 1.2rem;
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
}

/* ========== Footer ========== */
.site-footer {
    border-top: 1px solid var(--border);
    background: var(--bg-primary);
    padding: 4rem 0 0;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--border);
}

.footer-brand .logo {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.footer-brand > p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 1.2rem;
    max-width: 380px;
}

.socials {
    display: flex;
    gap: 0.7rem;
}

.socials a {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    transition: var(--transition);
}

.socials a:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(76, 201, 240, 0.1);
    transform: translateY(-3px);
}

.footer-links h4,
.footer-info h4 {
    font-size: 1rem;
    margin-bottom: 1rem;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
}

.footer-links ul {
    list-style: none;
    display: grid;
    gap: 0.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 0.4rem;
}

.footer-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.4rem;
}

.footer-info strong {
    color: var(--text-primary);
}

.footer-bottom {
    padding: 1.5rem 0;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-bottom p:first-child {
    margin-bottom: 0.3rem;
}

.footer-credit {
    font-size: 0.78rem !important;
    color: var(--text-muted) !important;
    opacity: 0.7;
}

/* ========== Reveal Animations ========== */
.reveal-up,
.reveal-left,
.reveal-right {
    opacity: 0;
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-up {
    transform: translateY(40px);
}

.reveal-left {
    transform: translateX(-40px);
}

.reveal-right {
    transform: translateX(40px);
}

.reveal-up.revealed,
.reveal-left.revealed,
.reveal-right.revealed {
    opacity: 1;
    transform: translate(0, 0);
}

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

/* ========== Responsive ========== */
@media (max-width: 1200px) {
    .brands-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 1080px) {
    .legendary-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

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

    .comparison-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
}

@media (max-width: 900px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        right: 1rem;
        top: calc(var(--header-height) + 0.5rem);
        flex-direction: column;
        align-items: stretch;
        width: min(92vw, 320px);
        background: rgba(6, 10, 20, 0.97);
        backdrop-filter: blur(20px);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        padding: 0.5rem;
        gap: 0.2rem;
        opacity: 0;
        pointer-events: none;
        transform: translateY(-10px) scale(0.95);
        transition: var(--transition);
        z-index: 999;
    }

    .nav-links.open {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0) scale(1);
    }

    .nav-links a {
        padding: 0.7rem 1rem;
        border-radius: var(--radius-sm);
    }

    .nav-links a:hover {
        background: rgba(76, 201, 240, 0.1);
    }

    .timeline::before {
        left: 16px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 3rem !important;
        padding-right: 0 !important;
        margin-left: 0 !important;
        text-align: left !important;
    }

    .timeline-dot {
        left: 9px !important;
        right: auto !important;
    }

    .tech-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .tech-image img {
        height: 300px;
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 640px) {
    .section {
        padding: 4.5rem 0;
    }

    .container {
        width: min(100% - 1.5rem, var(--container));
    }

    #navbar {
        padding: 0.6rem 1rem;
    }

    .hero {
        min-height: 90vh;
        padding: 5rem 0 3rem;
    }

    .hero h1 {
        font-size: clamp(1.8rem, 8vw, 2.5rem);
    }

    .hero-text {
        font-size: 0.95rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .scroll-indicator {
        display: none;
    }

    .legendary-grid,
    .brands-grid,
    .categories-grid,
    .stats-grid,
    .future-grid {
        grid-template-columns: 1fr;
    }

    .tech-cards {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: clamp(1.6rem, 6vw, 2.2rem);
    }

    .section-subtitle {
        font-size: 0.95rem;
    }

    .marquee-content {
        gap: 2rem;
    }

    .marquee-content span {
        font-size: 0.75rem;
    }

    .engine-step {
        flex-direction: column;
        gap: 0.75rem;
    }

    .engine-step-number {
        font-size: 1.5rem;
    }

    .back-to-top {
        bottom: 1.2rem;
        right: 1.2rem;
        width: 42px;
        height: 42px;
    }
}

@media (max-width: 380px) {
    .hero h1 {
        font-size: 1.6rem;
    }

    .section {
        padding: 3.5rem 0;
    }

    .facts li {
        font-size: 0.85rem;
    }
}