/* ============================================================
   OHM. — Electronics store
   Tokens: graphite background, "voltage blue" accent, spec-
   sheet typography (Sora display + Inter body + mono for
   prices/specs). Signature element: a mouse-tracking spotlight
   on product cards, rebuilt in plain CSS + a few lines of JS
   (Aceternity "Spotlight" pattern, no library).
   ============================================================ */

:root {
  --bg: #0c0d10;
  --surface: #16181d;
  --surface-2: #1e2127;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #eef0f2;
  --text-dim: #9aa1ab;
  --text-faint: #636973;
  --accent: #4c8fff;
  --accent-soft: rgba(76, 143, 255, 0.14);
  --accent-line: rgba(76, 143, 255, 0.4);
  --success: #34d399;
  --success-soft: rgba(52, 211, 153, 0.14);

  --font-display: "Sora", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --max-w: 1180px;
  --radius: 14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  font-size: 16px;
}

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

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

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--accent);
}

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

::selection { background: var(--accent); color: #060708; }

/* ---------------- Buttons ---------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.94rem;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn-primary { background: var(--accent); color: #05070c; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(76, 143, 255, 0.25); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-ghost { border-color: var(--line-strong); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent-line); background: var(--accent-soft); }
.btn-small { padding: 9px 16px; font-size: 0.85rem; }
.btn-block { width: 100%; }
.btn-link { background: none; border: none; color: var(--text-dim); font-size: 0.85rem; text-decoration: underline; }
.btn-link:hover { color: var(--text); }

/* ---------------- Navbar ---------------- */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12, 13, 16, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-block: 16px;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand .dot { color: var(--accent); }

.nav-center {
  display: flex;
  gap: 30px;
  font-size: 0.92rem;
  color: var(--text-dim);
}
.nav-center a:hover { color: var(--text); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 18px;
}

.cart-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--text-dim);
}
.cart-link:hover { color: var(--text); }
.cart-link svg { width: 20px; height: 20px; }

[data-cart-badge] {
  position: absolute;
  top: -8px;
  right: -10px;
  background: var(--accent);
  color: #05070c;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  min-width: 17px;
  height: 17px;
  border-radius: 999px;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

[data-auth-slot] { display: flex; align-items: center; }
.auth-user { display: flex; align-items: center; gap: 8px; font-size: 0.88rem; }
.auth-avatar { width: 26px; height: 26px; border-radius: 50%; }
.auth-dev-note {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-faint);
  border: 1px dashed var(--line-strong);
  padding: 5px 10px;
  border-radius: 999px;
}

/* ---------------- Hero (landing) ---------------- */

.hero {
  padding: 90px 0 70px;
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 55% 45% at 85% -10%, rgba(76, 143, 255, 0.12), transparent 60%);
  pointer-events: none;
}
.hero .container { position: relative; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.hero-title {
  font-size: clamp(2.2rem, 4.6vw, 3.4rem);
  font-weight: 700;
}
.hero-title span { color: var(--accent); }
.hero-desc {
  margin-top: 20px;
  color: var(--text-dim);
  max-width: 46ch;
  font-size: 1.05rem;
}
.hero-actions { margin-top: 32px; display: flex; gap: 14px; flex-wrap: wrap; }

.hero-spec {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}
.hero-spec img { border-radius: 10px; width: 100%; aspect-ratio: 1; object-fit: cover; }
.hero-spec .spec-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 16px;
}
.hero-spec h3 { margin-top: 6px; font-size: 1.1rem; }
.hero-spec .price { font-family: var(--font-mono); color: var(--accent); margin-top: 8px; font-size: 1.2rem; }

/* ---------------- Categories ---------------- */

.categories { padding: 56px 0; border-bottom: 1px solid var(--line); }
.category-row { display: flex; gap: 12px; flex-wrap: wrap; }
.category-chip {
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  font-size: 0.88rem;
  color: var(--text-dim);
  background: var(--surface);
  transition: border-color 0.2s ease, color 0.2s ease;
}
.category-chip:hover, .category-chip.active {
  border-color: var(--accent-line);
  color: var(--text);
  background: var(--accent-soft);
}

/* ---------------- Section heads ---------------- */

.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 32px; flex-wrap: wrap; gap: 12px; }
.section-head h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); }

/* ---------------- Product grid + spotlight cards ---------------- */

section { padding: 64px 0; }

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

.product-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease;
  isolation: isolate;
}
.product-card:hover { border-color: var(--line-strong); transform: translateY(-3px); }

/* Signature element: spotlight follows the cursor via --mx/--my,
   set by a shared mousemove listener in listing.js / landing.js */
.product-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: radial-gradient(320px circle at var(--mx, 50%) var(--my, 0%), rgba(76, 143, 255, 0.14), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.product-card:hover::before { opacity: 1; }

.product-card-inner { position: relative; z-index: 1; }

.product-card img {
  aspect-ratio: 1;
  object-fit: cover;
  width: 100%;
  border-bottom: 1px solid var(--line);
}
.product-card-body { padding: 18px; }
.product-cat {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}
.product-card h3 { font-size: 1.02rem; margin-top: 6px; font-weight: 600; }
.product-tagline { color: var(--text-dim); font-size: 0.86rem; margin-top: 4px; }
.product-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
}
.product-price { font-family: var(--font-mono); color: var(--accent); font-weight: 600; }
.product-rating { font-size: 0.8rem; color: var(--text-faint); }

/* ---------------- Listing page: filter bar ---------------- */

.filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.filter-bar select {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.88rem;
}
.results-count { font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-faint); }

/* ---------------- Product detail ---------------- */

.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
.detail-gallery img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}
.detail-info .product-cat { margin-bottom: 10px; }
.detail-info h1 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
.detail-meta { display: flex; align-items: center; gap: 14px; margin-top: 10px; color: var(--text-faint); font-size: 0.9rem; }
.detail-price { font-family: var(--font-mono); font-size: 1.7rem; color: var(--accent); margin-top: 18px; font-weight: 600; }
.detail-desc { margin-top: 18px; color: var(--text-dim); max-width: 54ch; }

.qty-stepper {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  width: fit-content;
  margin-top: 24px;
}
.qty-stepper button {
  background: none;
  border: none;
  color: var(--text);
  width: 40px;
  height: 44px;
  font-size: 1.1rem;
}
.qty-stepper button:hover { color: var(--accent); }
.qty-stepper span { width: 40px; text-align: center; font-family: var(--font-mono); }

.detail-actions { margin-top: 20px; display: flex; gap: 14px; align-items: center; }
.add-confirm {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--success);
  opacity: 0;
  transition: opacity 0.2s ease;
}
.add-confirm.show { opacity: 1; }

.spec-table { margin-top: 32px; border-top: 1px solid var(--line); }
.spec-table div {
  display: flex;
  justify-content: space-between;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
}
.spec-table div span:first-child { color: var(--text-faint); font-family: var(--font-mono); font-size: 0.82rem; }

/* ---------------- Cart page ---------------- */

.cart-layout {
  display: grid;
  grid-template-columns: 1.7fr 1fr;
  gap: 40px;
  align-items: start;
}
.cart-items { display: flex; flex-direction: column; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.cart-row {
  background: var(--surface);
  padding: 20px;
  display: grid;
  grid-template-columns: 72px 1fr auto auto;
  gap: 18px;
  align-items: center;
}
.cart-row img { width: 72px; height: 72px; object-fit: cover; border-radius: 8px; }
.cart-row h3 { font-size: 0.98rem; }
.cart-row .cat { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-faint); text-transform: uppercase; }
.cart-row .line-total { font-family: var(--font-mono); color: var(--accent); font-weight: 600; white-space: nowrap; }
.cart-row .remove { color: var(--text-faint); font-size: 0.8rem; }
.cart-row .remove:hover { color: var(--text); }

.empty-cart { text-align: center; padding: 80px 0; color: var(--text-dim); }
.empty-cart .btn { margin-top: 20px; }

.summary-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  position: sticky;
  top: 100px;
}
.summary-card h3 { font-size: 1.05rem; margin-bottom: 18px; }
.summary-line { display: flex; justify-content: space-between; padding: 10px 0; font-size: 0.92rem; color: var(--text-dim); border-bottom: 1px solid var(--line); }
.summary-line.total { color: var(--text); font-weight: 600; font-size: 1.05rem; border-bottom: none; padding-top: 16px; }
.summary-line span:last-child { font-family: var(--font-mono); }

/* ---------------- Checkout ---------------- */

.checkout-gate {
  max-width: 480px;
  margin: 40px auto;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 48px 36px;
}
.checkout-gate .lock-icon {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--accent-soft);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
}
.checkout-gate h2 { font-size: 1.4rem; }
.checkout-gate p { color: var(--text-dim); margin-top: 12px; }
.checkout-gate .btn { margin-top: 26px; }

.checkout-layout { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: start; }
.checkout-form { display: flex; flex-direction: column; gap: 14px; }
.checkout-form label { font-size: 0.82rem; color: var(--text-faint); font-family: var(--font-mono); margin-bottom: -6px; }
.checkout-form input {
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 13px 16px;
  color: var(--text);
  font-size: 0.94rem;
}
.checkout-form input:focus { outline: none; border-color: var(--accent); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.order-confirmation {
  max-width: 520px;
  margin: 40px auto;
  text-align: center;
  padding: 20px 0;
}
.order-confirmation .check {
  width: 64px; height: 64px; border-radius: 50%;
  background: var(--success-soft);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
}
.order-confirmation h2 { font-size: 1.6rem; }
.order-confirmation p { color: var(--text-dim); margin-top: 10px; }
.order-id { font-family: var(--font-mono); color: var(--accent); margin-top: 18px; font-size: 1.1rem; }

/* ---------------- Footer ---------------- */

footer { padding: 40px 0; border-top: 1px solid var(--line); }
footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; color: var(--text-faint); }

/* ---------------- Responsive ---------------- */

@media (max-width: 900px) {
  .hero-grid, .detail-grid, .cart-layout, .checkout-layout { grid-template-columns: 1fr; }
  .nav-center { display: none; }
  .summary-card { position: static; }
}

@media (max-width: 560px) {
  section { padding: 44px 0; }
  .cart-row { grid-template-columns: 56px 1fr; grid-template-areas: "img name" "img controls"; }
  .cart-row img { grid-area: img; width: 56px; height: 56px; }
  .form-row { grid-template-columns: 1fr; }
}