:root {
    --bg-dark: #0a0a0c;
    --bg-card: #141418;
    --text-primary: #ffffff;
    --text-secondary: #94949a;
    --accent: #ff4747; /* Sporty red for motorcycles */
    --accent-hover: #ff2929;
    --glass: rgba(255, 255, 255, 0.03);
    --border: rgba(255, 255, 255, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: rgba(10, 10, 12, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 20px 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 2px;
}

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

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.nav-links a:hover {
    color: var(--text-primary);
}

/* Typography & Titles */
.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 48px;
    background: linear-gradient(135deg, #fff, #888);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-title.left {
    text-align: left;
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.hero-text h2 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-text h2 span {
    color: var(--accent);
}

.hero-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 480px;
}

.download-links {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.btn {
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-block;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 8px 24px rgba(255, 71, 71, 0.25);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--glass);
    border: 1px solid var(--border);
    color: #fff;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

.qr-code {
    display: flex;
    align-items: center;
    gap: 16px;
}

.qr-code p {
    font-size: 0.85rem;
    margin: 0;
    max-width: 150px;
}

.qr-placeholder {
    width: 80px;
    height: 80px;
    background: var(--glass);
    border: 1px dashed var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    color: var(--text-secondary);
    border-radius: 8px;
}

.hero-image img {
    width: 100%;
    max-width: 600px;
    filter: drop-shadow(0 20px 40px rgba(0,0,0,0.5));
}

.floating {
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* Hero Pricing */
.hero-pricing-box {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
    border: 1px solid var(--accent);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 32px;
    max-width: 480px;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(255, 71, 71, 0.1);
}

.price-tags {
    margin-bottom: 20px;
}

.msrp {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.msrp .strike {
    text-decoration: line-through;
    opacity: 0.7;
}

.promo {
    font-size: 1.1rem;
    font-weight: 600;
}

.promo .highlight {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--accent);
    display: block;
    line-height: 1.2;
    text-shadow: 0 2px 10px rgba(255, 71, 71, 0.3);
}

.btn-buy {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg, #0068ff, #0050c7); /* Zalo blue */
    color: #fff;
    font-size: 1.1rem;
    padding: 16px 32px;
    width: 100%;
    border-radius: 12px;
    font-weight: 700;
    text-transform: uppercase;
    box-shadow: 0 8px 24px rgba(0, 104, 255, 0.3);
}

.btn-buy:hover {
    background: linear-gradient(135deg, #0050c7, #003da1);
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(0, 104, 255, 0.4);
    color: #fff;
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 104, 255, 0.5);
    }
    70% {
        box-shadow: 0 0 0 15px rgba(0, 104, 255, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 104, 255, 0);
    }
}

/* Demo Video */
.demo-video {
    padding: 100px 0;
    background: var(--bg-dark);
}

.video-slider-wrapper {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    align-items: center;
}

.video-slider {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    -ms-overflow-style: none;
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 24px;
    background: var(--bg-card);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.video-slider::-webkit-scrollbar {
    display: none;
}

.video-slide {
    flex: 0 0 100%;
    scroll-snap-align: start;
    aspect-ratio: 16/9;
    position: relative;
    box-sizing: border-box;
}

.video-slide iframe,
.video-slide video {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

.video-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    background: linear-gradient(145deg, var(--bg-card), var(--bg-dark));
}

.play-icon {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 16px;
    opacity: 0.8;
}

/* Features */
.features {
    padding: 100px 0;
}

.slider-container-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.features-slider {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 32px;
    padding: 20px 0;
    scrollbar-width: none;
    -ms-overflow-style: none;
    width: 100%;
}

.features-slider::-webkit-scrollbar {
    display: none;
}

.feature-card {
    flex: 0 0 calc(25% - 24px); /* 4 items */
    scroll-snap-align: start;
    box-sizing: border-box;
}

.slider-btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    position: absolute;
    z-index: 10;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
}

.slider-btn:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.slider-btn.prev {
    left: -24px;
}

.slider-btn.next {
    right: -24px;
}

@media (max-width: 1100px) {
    .feature-card {
        flex: 0 0 calc(33.333% - 22px);
    }
}

@media (max-width: 800px) {
    .feature-card {
        flex: 0 0 calc(50% - 16px);
    }
}

@media (max-width: 500px) {
    .feature-card {
        flex: 0 0 100%;
    }
    .slider-btn {
        display: none;
    }
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 32px;
    text-align: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
}

.feature-card img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    margin-bottom: 24px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.feature-card h4 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Gallery */
.gallery {
    padding: 100px 0;
    background: var(--glass);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.gallery-grid img {
    width: 100%;
    border-radius: 20px;
    transition: transform 0.3s ease;
    border: 1px solid var(--border);
}

.gallery-grid img:hover {
    transform: scale(1.02);
    z-index: 2;
}

/* Pricing */
.pricing {
    padding: 100px 0;
}

.pricing-card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    overflow: hidden;
}

.price-item {
    padding: 48px;
    text-align: center;
}

.price-item h4 {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.price-item .price {
    font-size: 2rem;
    font-weight: 800;
}

.price-item .price.strike {
    text-decoration: line-through;
    color: var(--text-secondary);
    font-size: 1.5rem;
}

.price-item.highlight {
    background: linear-gradient(145deg, rgba(255,71,71,0.1) 0%, rgba(255,71,71,0) 100%);
    border-left: 1px solid var(--border);
    position: relative;
}

.price-item.highlight .price {
    color: var(--accent);
}

.price-item .note {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 16px;
}

/* Contact */
.contact {
    padding: 100px 0;
    background: var(--glass);
    border-top: 1px solid var(--border);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.contact-info p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 32px;
}

.contact-list {
    list-style: none;
}

.contact-list li {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    font-size: 1.1rem;
}

.contact-list .icon {
    font-size: 1.5rem;
    width: 48px;
    height: 48px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-list a:hover {
    color: var(--accent);
}

.contact-image img {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    display: block;
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

/* Footer */
.footer {
    padding: 40px 0;
    text-align: center;
    color: var(--text-secondary);
    border-top: 1px solid var(--border);
    background: var(--bg-card);
}

/* Responsive */
@media (max-width: 900px) {
    .hero-content, .contact-container, .pricing-card {
        grid-template-columns: 1fr;
    }
    
    .pricing-card .price-item.highlight {
        border-left: none;
        border-top: 1px solid var(--border);
    }
    
    .hero-text h2 {
        font-size: 3rem;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
}