/* Nexora — Electronics Store | Futuristic dark tech */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
:root,[data-theme="dark"]{
  --bg:#0a0e13; --surface:#121820; --surface-2:#1a222c; --border:#232d38;
  --text:#e8edf2; --text-dim:#93a1af; --cyan:#28e0ff; --cyan-dim:#0b95ad;
  --font-d:'Sora',sans-serif; --font-b:'Inter',sans-serif;
}
[data-theme="light"]{
  --bg:#f4f7f9; --surface:#ffffff; --surface-2:#eef2f5; --border:#dbe3e8;
  --text:#101820; --text-dim:#54626d; --cyan:#0091ab; --cyan-dim:#00727f;
}
body{background:var(--bg);color:var(--text);font-family:var(--font-b);transition:background .3s,color .3s;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--font-d)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

.header{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:1rem clamp(1.2rem,4vw,3rem);background:rgba(10,14,19,.75);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
[data-theme="light"] .header{background:rgba(244,247,249,.85)}
.logo{font-family:var(--font-d);font-weight:800;letter-spacing:.04em;font-size:1.3rem;background:linear-gradient(90deg,var(--cyan),#7dfaff);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav{display:flex;gap:2rem;align-items:center;font-weight:500;font-size:.92rem}
.dropdown{position:relative}
.drop-btn{background:none;border:none;color:inherit;font:inherit;cursor:pointer;padding:.4rem 0}
.drop-panel{position:absolute;top:100%;left:0;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:.6rem;min-width:160px;display:flex;flex-direction:column;opacity:0;visibility:hidden;transform:translateY(6px);transition:.2s}
.dropdown:hover .drop-panel,.dropdown:focus-within .drop-panel{opacity:1;visibility:visible;transform:translateY(0)}
.drop-panel a{padding:.55rem .7rem;border-radius:6px}
.drop-panel a:hover{background:var(--surface-2);color:var(--cyan)}
.nav>a:hover{color:var(--cyan)}
.header-actions{display:flex;align-items:center;gap:.8rem}
.theme-toggle{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:.5rem .9rem;border-radius:100px;cursor:pointer;font-size:.82rem}
.menu-btn{display:none;background:none;border:1px solid var(--border);color:var(--text);width:40px;height:40px;border-radius:8px;cursor:pointer;font-size:1.1rem}
.mobile-menu{display:none;flex-direction:column;background:var(--surface);border-bottom:1px solid var(--border)}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:1rem 1.5rem;border-top:1px solid var(--border)}

.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:2rem;align-items:center;max-width:1320px;margin:0 auto;padding:clamp(3rem,7vw,5rem) 1.5rem}
.kicker{color:var(--cyan);font-weight:600;letter-spacing:.04em;margin-bottom:1rem;font-size:.9rem}
.hero-text h1{font-size:clamp(2.2rem,5vw,3.4rem);line-height:1.1;margin-bottom:1.2rem}
.hero-text h1 span{color:var(--cyan)}
.lede{color:var(--text-dim);max-width:52ch;margin-bottom:1.8rem;line-height:1.6}
.hero-cta{display:flex;gap:1rem;flex-wrap:wrap;margin-bottom:2.4rem}
.btn{padding:.85rem 1.5rem;border-radius:10px;font-weight:600;font-size:.92rem;cursor:pointer;border:1px solid transparent;display:inline-block}
.btn-primary{background:var(--cyan);color:#031014}
.btn-primary:hover{background:var(--cyan-dim);color:#fff}
.btn-ghost{border-color:var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-small{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:.5rem 1rem;border-radius:8px;font-size:.85rem}
.btn-small:hover{border-color:var(--cyan);color:var(--cyan)}
.hero-stats{display:flex;gap:2.2rem}
.hero-stats strong{display:block;font-family:var(--font-d);font-size:1.5rem;color:var(--cyan)}
.hero-stats span{font-size:.8rem;color:var(--text-dim)}
.hero-visual{position:relative}
.hero-visual img{border-radius:20px;border:1px solid var(--border);position:relative;z-index:1}
.glow{position:absolute;inset:-15%;background:radial-gradient(circle at 60% 40%,rgba(40,224,255,.35),transparent 60%);filter:blur(20px);z-index:0}

.marquee-strip{border-top:1px solid var(--border);border-bottom:1px solid var(--border);overflow:hidden;white-space:nowrap;padding:.8rem 0;background:var(--surface)}
.marquee-track{display:inline-flex;gap:2.5rem;color:var(--text-dim);font-size:.85rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;animation:mv 22s linear infinite}
.marquee-track span::after{content:"•";margin-left:2.5rem;color:var(--cyan)}
@keyframes mv{from{transform:translateX(0)}to{transform:translateX(-50%)}}

.products{max-width:1320px;margin:0 auto;padding:clamp(3rem,6vw,5rem) 1.5rem}
.products h2,.compare h2,.faq h2,.specs-accordion h2{font-size:clamp(1.6rem,3.4vw,2.2rem);margin-bottom:2rem}
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.4rem}
.product-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:1.2rem;position:relative;transition:transform .25s,border-color .25s}
.product-card:hover{transform:translateY(-6px);border-color:var(--cyan)}
.product-card img{border-radius:10px;margin-bottom:1rem;aspect-ratio:4/3;object-fit:cover}
.product-card h3{font-size:1.05rem;margin-bottom:.3rem}
.product-card p{color:var(--text-dim);font-size:.85rem;margin-bottom:1rem}
.badge{position:absolute;top:1rem;right:1rem;background:var(--cyan);color:#031014;font-size:.7rem;font-weight:700;padding:.25rem .6rem;border-radius:100px}
.badge.alt{background:#ff9f43;color:#231200}
.card-foot{display:flex;justify-content:space-between;align-items:center}
.price{font-family:var(--font-d);font-weight:700}

.compare{max-width:1000px;margin:0 auto;padding:clamp(3rem,6vw,5rem) 1.5rem}
.tabs{display:flex;gap:.6rem;margin-bottom:1.5rem}
.tab{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:.6rem 1.2rem;border-radius:100px;cursor:pointer;font-weight:600}
.tab.active{background:var(--cyan);color:#031014;border-color:var(--cyan)}
.compare-table{border:1px solid var(--border);border-radius:14px;overflow:hidden}
.row{display:grid;grid-template-columns:1fr 1fr;padding:.9rem 1.2rem;border-bottom:1px solid var(--border)}
.row:last-child{border-bottom:none}
.row.head{background:var(--surface-2);font-weight:700}
.row span:first-child{color:var(--text-dim)}

.specs{max-width:1320px;margin:0 auto;padding:clamp(3rem,6vw,5rem) 1.5rem;display:grid;grid-template-columns:1fr 1.2fr;gap:3rem;align-items:start}
.specs-visual img{border-radius:16px;border:1px solid var(--border)}
.acc-item{border-bottom:1px solid var(--border)}
.acc-head{width:100%;display:flex;justify-content:space-between;align-items:center;background:none;border:none;color:var(--text);padding:1.1rem 0;font-weight:600;font-size:1rem;cursor:pointer;text-align:left}
.acc-head span{color:var(--cyan);font-size:1.2rem}
.acc-body{max-height:0;overflow:hidden;transition:max-height .3s ease}
.acc-body.open{max-height:200px}
.acc-body p{color:var(--text-dim);padding-bottom:1.1rem;line-height:1.6}

.faq{max-width:1000px;margin:0 auto;padding:clamp(3rem,6vw,5rem) 1.5rem}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
details{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1rem 1.2rem}
summary{cursor:pointer;font-weight:600}
details p{color:var(--text-dim);margin-top:.7rem;line-height:1.6}

.footer{border-top:1px solid var(--border);padding:3rem clamp(1.2rem,4vw,3rem) 2rem;background:var(--surface)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:2rem;max-width:1320px;margin:0 auto 2rem}
.footer-grid p{color:var(--text-dim);margin-top:.6rem;font-size:.9rem}
.footer-grid h3{font-size:.85rem;text-transform:uppercase;letter-spacing:.04em;margin-bottom:1rem;color:var(--text-dim)}
.footer-grid a{display:block;margin-bottom:.6rem}
.footer-grid a:hover{color:var(--cyan)}
.footer-bottom{text-align:center;color:var(--text-dim);font-size:.8rem;max-width:1320px;margin:0 auto}

@media (max-width:960px){
  .nav{display:none}
  .menu-btn{display:block}
  .hero{grid-template-columns:1fr}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .specs{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr}
}
@media (max-width:560px){
  .product-grid{grid-template-columns:1fr}
  .hero-stats{flex-wrap:wrap;gap:1.2rem}
}