/* ============================================
   DESIGN TOKENS
   ============================================ */
:root {
  --bg: #0e1117;
  --surface: #171b22;
  --surface-raised: #1f242d;
  --border: #2a313c;
  --text: #f3f5f2;
  --text-dim: #8b95a1;
  --text-faint: #5c6570;
  --accent: #c6ff3d;
  --accent-dim: #9bd12c;
  --accent-ink: #0e1117;
  --warn: #ff9d47;
  --radius: 10px;
  --radius-sm: 6px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-width: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.25rem; }

p { color: var(--text-dim); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

/* Focus visibility for accessibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* ============================================
   HEADER / NAV
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14, 17, 23, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}

.nav-links a {
  font-size: 0.92rem;
  color: var(--text-dim);
  transition: color 0.15s ease;
}

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

.nav-cart {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

.nav-cart .count {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  border-radius: 999px;
  min-width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
}

/* Nav dropdown (Shop menu) */
.nav-dropdown { position: relative; }
.nav-dropdown-toggle {
  background: none;
  border: none;
  color: var(--text-dim);
  font: inherit;
  font-size: 0.92rem;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-dropdown-toggle:hover { color: var(--text); }
.nav-dropdown-menu {
  position: absolute;
  top: 140%;
  left: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  min-width: 230px;
  padding: 8px;
  display: none;
  flex-direction: column;
  gap: 2px;
  z-index: 150;
  box-shadow: 0 20px 40px -20px rgba(0,0,0,0.6);
}
.nav-dropdown-menu.open { display: flex; }
.nav-dropdown-menu a {
  padding: 9px 12px;
  border-radius: 6px;
  font-size: 0.88rem;
  color: var(--text-dim);
}
.nav-dropdown-menu a:hover { background: var(--surface-raised); color: var(--text); }
.nav-dropdown-menu .divider { border-top: 1px solid var(--border); margin: 6px 4px; }

/* Nav search */
.nav-search { flex: 1; max-width: 240px; margin: 0 12px; }
.nav-search input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 9px 16px;
  color: var(--text);
  font-size: 0.85rem;
  font-family: var(--font-body);
}
.nav-search input::placeholder { color: var(--text-faint); }
@media (max-width: 900px) { .nav-search { display: none; } }

/* Breadcrumbs */
.breadcrumbs {
  font-size: 0.82rem;
  font-family: var(--font-mono);
  margin-bottom: 14px;
}
.breadcrumbs a { color: var(--text-dim); }
.breadcrumbs a:hover { color: var(--accent); }

/* Compare checkbox active state */
.product-card label input[type="checkbox"]:checked ~ * { color: var(--accent); }

/* Compare floating bar */
.compare-bar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 12px 20px;
  display: none;
  align-items: center;
  gap: 16px;
  z-index: 190;
  box-shadow: 0 20px 50px -20px rgba(0,0,0,0.7);
  font-size: 0.85rem;
}
.compare-bar-text { color: var(--text-dim); max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

@media (max-width: 780px) {
  .nav-links { position: fixed; top: 64px; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); flex-direction: column; align-items: flex-start; padding: 16px 24px; gap: 16px; transform: translateY(-150%); transition: transform 0.2s ease; max-height: 80vh; overflow-y: auto; }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: block; }
  .nav-dropdown { width: 100%; }
  .nav-dropdown-menu { position: static; border: none; padding-left: 12px; box-shadow: none; }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, opacity 0.12s ease;
}
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
}
.btn-primary:hover { opacity: 0.88; }

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-secondary:hover { border-color: var(--text-dim); }

.btn-block { width: 100%; }
.btn-sm { padding: 9px 16px; font-size: 0.85rem; }

/* ============================================
   HERO
   ============================================ */
.hero {
  padding: 90px 0 70px;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(198,255,61,0.10) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 50px;
  align-items: center;
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
}

.hero h1 { margin: 14px 0 18px; }
.hero .lead { font-size: 1.1rem; max-width: 480px; margin-bottom: 30px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Signature element: power readout display */
.readout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
}

.readout::before {
  content: "● PWR";
  position: absolute;
  top: 16px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.readout-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.readout-value {
  font-family: var(--font-mono);
  font-size: 3rem;
  color: var(--accent);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 24px;
}

.readout-value span { font-size: 1.3rem; color: var(--text-dim); }

.readout-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  border-top: 1px solid var(--border);
  padding-top: 18px;
}

.readout-stat .num { font-family: var(--font-mono); font-size: 1.15rem; color: var(--text); }
.readout-stat .lbl { font-size: 0.75rem; color: var(--text-faint); }

/* ============================================
   SECTIONS
   ============================================ */
section { padding: 70px 0; }
.section-head { margin-bottom: 40px; max-width: 600px; }
.section-head h2 { margin-top: 10px; }
.section-head p { margin-top: 12px; }

.section-alt { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* Feature grid (why choose us) */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 800px) { .feature-grid { grid-template-columns: 1fr; } }

.feature-card {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
}
.feature-card .icon { color: var(--accent); font-family: var(--font-mono); font-size: 1.4rem; margin-bottom: 14px; display: block; }
.feature-card h3 { margin-bottom: 8px; }
.feature-card p { font-size: 0.92rem; }

/* ============================================
   PRODUCT GRID / CARDS
   ============================================ */
.filter-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.filter-btn.active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 700; }

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
@media (max-width: 980px) { .product-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .product-grid { grid-template-columns: 1fr; } }

.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.product-card:hover { border-color: var(--accent-dim); transform: translateY(-2px); }

.product-visual {
  aspect-ratio: 4/3;
  background: linear-gradient(160deg, var(--surface-raised), var(--bg));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border-bottom: 1px solid var(--border);
}

.product-visual .badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 5px 10px;
  border-radius: 999px;
  text-transform: uppercase;
}

.product-visual .series-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-faint);
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: 999px;
}

.device-icon {
  width: 64%;
  aspect-ratio: 5/4;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  box-shadow: 0 20px 40px -20px rgba(0,0,0,0.6);
}

.device-icon .wh {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1.4rem;
  font-weight: 700;
}
.device-icon .wh-lbl { font-family: var(--font-mono); font-size: 0.6rem; color: var(--text-faint); letter-spacing: 0.08em; }
.device-icon .bar { width: 60%; height: 4px; background: var(--border); border-radius: 2px; margin-top: 6px; overflow: hidden; }
.device-icon .bar span { display: block; height: 100%; background: var(--accent); }

.product-body { padding: 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.product-body h3 { font-size: 1.1rem; }
.product-body .tagline { font-size: 0.85rem; color: var(--text-dim); flex: 1; }

.spec-row {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  border-top: 1px solid var(--border);
  padding-top: 10px;
}
.spec-row strong { color: var(--text); font-weight: 600; }

.price-row { display: flex; align-items: center; justify-content: space-between; margin-top: 4px; }
.price { font-family: var(--font-mono); font-size: 1.3rem; color: var(--accent); font-weight: 700; }

/* ============================================
   PRODUCT DETAIL
   ============================================ */
.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: start;
}
@media (max-width: 860px) { .detail-grid { grid-template-columns: 1fr; } }

.detail-visual { position: sticky; top: 100px; }
.detail-visual .product-visual { aspect-ratio: 1/1; border-radius: var(--radius); border: 1px solid var(--border); }

.detail-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 26px 0;
}
.spec-box { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; }
.spec-box .num { font-family: var(--font-mono); color: var(--accent); font-size: 1.15rem; font-weight: 700; }
.spec-box .lbl { font-size: 0.75rem; color: var(--text-faint); margin-top: 4px; }

.qty-row { display: flex; align-items: center; gap: 14px; margin: 24px 0; }
.qty-control { display: flex; align-items: center; border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.qty-control button { background: var(--surface-raised); border: none; color: var(--text); width: 38px; height: 38px; font-size: 1.1rem; cursor: pointer; }
.qty-control input { width: 44px; text-align: center; background: var(--surface); border: none; color: var(--text); font-family: var(--font-mono); height: 38px; }

/* ============================================
   CART / FORM
   ============================================ */
.cart-item {
  display: grid;
  grid-template-columns: 70px 1fr auto auto;
  gap: 16px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}
.cart-item .mini-icon { width: 70px; height: 70px; background: var(--surface-raised); border: 1px solid var(--border); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-family: var(--font-mono); color: var(--accent); font-size: 0.72rem; text-align: center; }
.cart-item h4 { font-size: 0.98rem; }
.cart-item .sub { font-size: 0.8rem; color: var(--text-faint); }
.cart-item .remove-btn { background: none; border: none; color: var(--text-faint); cursor: pointer; font-size: 0.8rem; text-decoration: underline; }

.cart-summary {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: sticky;
  top: 100px;
}
.summary-row { display: flex; justify-content: space-between; font-size: 0.92rem; margin-bottom: 10px; color: var(--text-dim); }
.summary-row.total { color: var(--text); font-weight: 700; font-size: 1.1rem; border-top: 1px solid var(--border); padding-top: 14px; margin-top: 14px; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 620px) { .form-grid { grid-template-columns: 1fr; } }
.form-field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.form-field label { font-size: 0.82rem; color: var(--text-dim); }
.form-field input, .form-field textarea, .form-field select {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
}
.form-field textarea { resize: vertical; min-height: 90px; }
.form-field input::placeholder, .form-field textarea::placeholder { color: var(--text-faint); }

.empty-state { text-align: center; padding: 60px 20px; color: var(--text-dim); }
.empty-state a { color: var(--accent); text-decoration: underline; }

/* ============================================
   ABOUT / TRUST / TESTIMONIAL
   ============================================ */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
@media (max-width: 860px) { .about-grid { grid-template-columns: 1fr; } }

.stat-strip { display: flex; gap: 40px; margin-top: 30px; flex-wrap: wrap; }
.stat-strip .stat .num { font-family: var(--font-mono); font-size: 1.8rem; color: var(--accent); font-weight: 700; }
.stat-strip .stat .lbl { font-size: 0.8rem; color: var(--text-faint); }

/* ============================================
   FAQ
   ============================================ */
.faq-item { border-bottom: 1px solid var(--border); padding: 20px 0; }
.faq-item summary { cursor: pointer; font-weight: 600; font-family: var(--font-display); list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--accent); font-size: 1.3rem; }
.faq-item[open] summary::after { content: "–"; }
.faq-item p { margin-top: 12px; font-size: 0.92rem; }

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 50px 0 30px;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 30px;
  margin-bottom: 40px;
}
@media (max-width: 780px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-grid h4 { font-size: 0.85rem; margin-bottom: 14px; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.06em; }
.footer-grid ul li { margin-bottom: 10px; }
.footer-grid a { font-size: 0.88rem; color: var(--text-dim); }
.footer-grid a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; border-top: 1px solid var(--border); padding-top: 24px; font-size: 0.8rem; color: var(--text-faint); }

/* ============================================
   POLICY PAGES (Privacy / Terms / Shipping)
   ============================================ */
.policy-content { max-width: 760px; }
.policy-content h2 { margin-top: 36px; margin-bottom: 12px; font-size: 1.2rem; }
.policy-content p, .policy-content li { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 10px; }
.policy-content ul { padding-left: 20px; list-style: disc; }
.updated-tag { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); margin-top: 10px; }

/* ============================================
   TOAST / CONFIRMATION
   ============================================ */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 10px 30px -10px rgba(0,0,0,0.5);
  transform: translateY(120%);
  transition: transform 0.25s ease;
  z-index: 200;
}
.toast.show { transform: translateY(0); }

.confirm-box {
  text-align: center;
  padding: 70px 24px;
  max-width: 560px;
  margin: 0 auto;
}
.confirm-box .icon-badge {
  width: 64px; height: 64px;
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 24px;
}