:root{--bg-dark:#000;--bg-light:#f5f5f7;--text-white:#f5f5f7;--text-black:#1d1d1f;--text-gray:#86868b;--accent:#2997ff;--accent-hover:#0077ed;--border:#424245}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg-dark);color:var(--text-white);-webkit-font-smoothing:antialiased;overflow-x:hidden}
h1,h2,h3,h4{letter-spacing:-.02em}p{line-height:1.5}.text-center{text-align:center}

/* Floaters */
.floaters{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:-1;overflow:hidden}
.floater{position:absolute;border-radius:50%;filter:blur(80px);opacity:.12}
.floater-1{width:600px;height:600px;top:-200px;left:-100px;background:radial-gradient(circle,#3b82f6,transparent)}
.floater-2{width:400px;height:400px;top:50%;right:-100px;background:radial-gradient(circle,#a855f7,transparent)}
.floater-3{width:500px;height:500px;bottom:-200px;left:30%;background:radial-gradient(circle,#ec4899,transparent)}

/* Global Nav */
.global-nav{background:rgba(0,0,0,.8);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);position:fixed;top:0;width:100%;height:48px;z-index:1000}
.nav-container{max-width:980px;margin:0 auto;height:100%;display:flex;justify-content:space-between;align-items:center;padding:0 20px}
.logo{color:var(--text-white);text-decoration:none;font-weight:600;display:flex;align-items:center;gap:8px;font-size:14px;cursor:pointer}
.logo svg{width:16px;height:16px}
.nav-links{display:flex;gap:32px}
.nav-link,.back-link{color:#e8e8ed;opacity:.8;text-decoration:none;font-size:12px;transition:opacity .2s;cursor:pointer}
.nav-link:hover,.back-link:hover{opacity:1}
.nav-link.active{opacity:1;color:var(--text-white)}
.back-link{border:1px solid var(--border);padding:4px 10px;border-radius:12px}

/* Pages */
.page{display:none}
.page.active{display:block}

/* Product Nav */
.product-nav{margin-top:48px;background:var(--bg-dark);border-bottom:1px solid #333;height:52px;position:relative;z-index:900;transition:background .3s}
.product-nav.sticky{position:fixed;top:48px;width:100%;margin-top:0;background:rgba(0,0,0,.8);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}
.product-name{font-size:21px;font-weight:600}
.product-actions{display:flex;align-items:center;gap:16px}
.price{font-size:14px;color:#e8e8ed}
.btn-buy{background:var(--text-white);color:var(--text-black);border:none;border-radius:20px;padding:4px 12px;font-size:12px;font-weight:600;cursor:pointer;transition:background .2s}
.btn-buy:hover{background:#d2d2d7}

/* Hero */
.hero{padding:100px 20px 60px;display:flex;flex-direction:column;align-items:center}
.hero-content{max-width:600px;margin-bottom:40px}
.hero-title{font-size:80px;font-weight:700;background:linear-gradient(135deg,#fff 0%,#a1a1a6 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:8px}
.hero-subtitle{font-size:40px;font-weight:600;margin-bottom:24px}
.hero-desc{font-size:21px;color:var(--text-gray);margin-bottom:32px}
.hero-image-wrapper{width:100%;max-width:1000px;overflow:hidden;border-radius:24px}
.hero-img{width:100%;height:auto;display:block;transition:opacity .4s,transform .1s}

/* Color Swatches */
.color-picker{display:flex;justify-content:center;gap:16px}
.color-swatch{width:32px;height:32px;border-radius:50%;cursor:pointer;border:2px solid transparent;transition:transform .2s,border-color .2s,box-shadow .2s}
.color-swatch:hover{transform:scale(1.15)}
.color-swatch.active{border-color:var(--accent);box-shadow:0 0 12px rgba(41,151,255,.3)}
.swatch-midnight{background:#1a1a1a;box-shadow:inset 0 0 0 1px #444}.swatch-starlight{background:#f0f0f4}.swatch-spacegray{background:#555}

/* Feature Grid */
.features{padding:100px 20px;max-width:1200px;margin:0 auto}
.feature-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:24px}
.feature-card{border-radius:24px;padding:40px;height:500px;display:flex;flex-direction:column;justify-content:flex-start;position:relative;overflow:hidden;transform-style:preserve-3d}
.feature-dark{background:#1a1a1a;color:var(--text-white)}.feature-light{background:var(--bg-light);color:var(--text-black)}
.feature-full{grid-column:span 2;height:700px;background:#000}
.feature-text{transform:translateZ(30px)}.feature-text h3{font-size:32px;font-weight:600;margin:16px 0 8px}
.feature-text p{font-size:19px;font-weight:500;max-width:350px}.feature-light .feature-text p{color:#555}
.feature-text svg{width:40px;height:40px}
.center-center{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;z-index:10}
.center-center h3{font-size:64px}.center-center p{max-width:500px;margin:0 auto}
.gradient-text{background:linear-gradient(90deg,#ff8c00,#ff0080);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.bg-video{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;opacity:.5}
.video-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:radial-gradient(circle at center,transparent 0%,rgba(0,0,0,.6) 100%)}
.bg-img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;opacity:.5}

/* Specs */
.specs{background:#111;padding:100px 20px}
.specs-container{max-width:980px;margin:0 auto;display:flex;gap:60px}
.specs-col{flex:1}.specs-title{font-size:48px;font-weight:600}
.spec-item h4{font-size:24px;font-weight:600;margin-bottom:12px}
.spec-item p{font-size:17px;color:var(--text-gray);line-height:1.6}
.spec-divider{height:1px;background:var(--border);margin:32px 0}

/* Accessories Page */
.accessories-hero{padding:120px 20px 40px;text-align:center}
.page-heading{font-size:56px;font-weight:700;background:linear-gradient(135deg,#fff,#a1a1a6 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:12px}
.page-desc{font-size:21px;color:var(--text-gray)}
.product-grid-section{padding:60px 20px;max-width:1200px;margin:0 auto}
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.product-item{background:#1a1a1a;border-radius:24px;overflow:hidden;padding:0 0 2rem;text-align:center;transition:transform .3s;transform-style:preserve-3d}
.product-item:hover{transform:translateY(-6px)}
.product-img{height:250px;overflow:hidden;margin-bottom:1.5rem}
.product-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.product-item:hover .product-img img{transform:scale(1.05)}
.product-item h4{font-size:1.1rem;font-weight:600;margin-bottom:.5rem;padding:0 1.5rem}
.product-item p{font-size:.88rem;color:var(--text-gray);padding:0 1.5rem;margin-bottom:1rem}
.product-price{color:var(--accent);font-size:1rem;font-weight:700}

/* Support Page */
.support-section{padding:40px 20px 80px;max-width:1000px;margin:0 auto}
.support-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-bottom:60px}
.support-card{background:#1a1a1a;border:1px solid #333;border-radius:20px;padding:2rem;transition:border-color .3s,transform .3s}
.support-card:hover{border-color:var(--accent);transform:translateY(-4px)}
.support-icon{margin-bottom:1rem}.support-icon svg{width:2rem;height:2rem;color:var(--accent)}
.support-card h4{font-size:1.1rem;font-weight:600;margin-bottom:.5rem}
.support-card p{color:var(--text-gray);font-size:.88rem;line-height:1.6;margin-bottom:1.25rem}
.support-link{color:var(--accent);text-decoration:none;font-size:.85rem;font-weight:500;display:inline-flex;align-items:center;gap:.3rem;transition:gap .2s}
.support-link:hover{gap:.6rem}
.support-link svg{width:.85rem;height:.85rem}

/* FAQ */
.faq-section{max-width:800px;margin:0 auto}
.faq-title{font-size:1.5rem;font-weight:600;margin-bottom:1.5rem;text-align:center}
.faq-item{border-bottom:1px solid #333}
.faq-question{width:100%;background:none;border:none;color:var(--text-white);padding:1.25rem 0;font-size:1rem;font-weight:500;text-align:left;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-family:'Inter',sans-serif}
.faq-question svg{width:1rem;height:1rem;color:var(--text-gray);transition:transform .3s}
.faq-item.open .faq-question svg{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s}
.faq-answer p{color:var(--text-gray);font-size:.92rem;line-height:1.7;padding-bottom:1.25rem}
.faq-item.open .faq-answer{max-height:200px}

/* Footer */
.footer{padding:40px 20px;border-top:1px solid #333;font-size:12px;color:var(--text-gray)}
.footer-container{max-width:980px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}
.footer-links{display:flex;gap:16px}
.footer-links a{color:var(--text-gray);text-decoration:none}.footer-links a:hover{text-decoration:underline}

/* Animations */
.reveal{opacity:0;transform:translateY(40px);transition:all .8s ease-out}
.reveal.active{opacity:1;transform:translateY(0)}

/* Responsive */
@media(max-width:768px){
    .nav-links{display:none}.hero-title{font-size:48px}.hero-subtitle{font-size:24px}
    .feature-grid{grid-template-columns:1fr}.feature-full{grid-column:span 1;height:500px}
    .center-center h3{font-size:40px}.specs-container{flex-direction:column}
    .floaters{display:none}.product-grid{grid-template-columns:1fr 1fr}
    .support-grid{grid-template-columns:1fr}.page-heading{font-size:40px}
}