:root {
  --bg: #0a0a0f;
  --bg-soft: #101018;
  --surface: #17171f;
  --surface-2: #1e1e28;
  --border: #2a2a36;
  --text: #f3efe8;
  --text-dim: #96919f;
  --text-faint: #635f6c;
  --pink: #ff2e88;
  --violet: #8b5cf6;
  --blue: #3ea8ff;
  --danger: #ff5470;
  --success: #43e6a0;
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --font-display: 'Bebas Neue', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --gradient: linear-gradient(90deg, var(--pink), var(--violet) 50%, var(--blue));
  --header-h: 64px;
  --max-width: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button { font-family: inherit; }
h1, h2 { margin: 0; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px; background: rgba(10,10,15,0.85); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border); z-index: 100;
}
.icon-btn {
  background: none; border: none; color: var(--text); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--radius-sm); position: relative;
}
.icon-btn:hover { background: var(--surface-2); }
.wordmark {
  font-family: var(--font-body); font-weight: 700; font-size: 17px;
  letter-spacing: 0.2px; color: var(--text); text-decoration: none;
  background: none; border: none; cursor: pointer;
}
.cart-badge {
  position: absolute; top: 2px; right: 2px; background: var(--pink); color: #fff;
  font-size: 10px; font-weight: 700; min-width: 16px; height: 16px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center; padding: 0 4px;
}

/* ---------- Overlay / Side menu / Cart drawer ---------- */
.overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6); opacity: 0;
  pointer-events: none; transition: opacity .25s ease; z-index: 150;
}
.overlay.active { opacity: 1; pointer-events: auto; }

.side-menu {
  position: fixed; top: 0; left: 0; bottom: 0; width: 280px; max-width: 80vw;
  background: var(--surface); border-right: 1px solid var(--border);
  transform: translateX(-100%); transition: transform .3s ease; z-index: 200;
  padding: 24px 20px; display: flex; flex-direction: column; gap: 4px;
}
.side-menu.active { transform: translateX(0); }
.side-menu-link {
  font-family: var(--font-display); font-size: 28px; letter-spacing: .5px;
  color: var(--text); text-decoration: none; padding: 14px 8px; border-radius: var(--radius-sm);
}
.side-menu-link:hover { background: var(--surface-2); color: var(--pink); }

.cart-drawer {
  position: fixed; top: 0; right: 0; bottom: 0; width: 380px; max-width: 90vw;
  background: var(--surface); border-left: 1px solid var(--border);
  transform: translateX(100%); transition: transform .3s ease; z-index: 200;
  display: flex; flex-direction: column;
}
.cart-drawer.active { transform: translateX(0); }
.cart-drawer-header {
  padding: 20px; border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
}
.cart-drawer-title { font-family: var(--font-display); font-size: 24px; letter-spacing: .5px; }
.cart-drawer-items { flex: 1; overflow-y: auto; padding: 4px 20px; }
.cart-drawer-footer { padding: 20px; border-top: 1px solid var(--border); }

.cart-line { display: flex; gap: 12px; padding: 16px 0; border-bottom: 1px solid var(--border); }
.cart-line-swatch { width: 56px; height: 56px; border-radius: var(--radius-sm); flex-shrink: 0; }
.cart-line-info { flex: 1; min-width: 0; }
.cart-line-name { font-weight: 600; font-size: 14px; }
.cart-line-meta { color: var(--text-dim); font-size: 13px; margin-top: 2px; }
.cart-line-price { font-weight: 600; font-size: 14px; margin-top: 6px; }
.cart-line-remove {
  background: none; border: none; color: var(--text-dim); font-size: 12px;
  text-decoration: underline; cursor: pointer; padding: 0; margin-top: 6px;
}
.cart-line-remove:hover { color: var(--danger); }
.cart-empty { color: var(--text-dim); text-align: center; padding: 48px 0; }

/* ---------- Buttons ---------- */
.btn {
  font-weight: 600; font-size: 15px; padding: 14px 20px; border-radius: var(--radius-sm);
  border: none; cursor: pointer; transition: transform .15s ease, opacity .15s ease;
}
.btn:active { transform: scale(.98); }
.btn-primary { background: var(--gradient); color: #0a0a0f; width: 100%; }
.btn-primary:hover { opacity: .92; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--pink); color: var(--pink); }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ---------- Layout / sections ---------- */
.hero { width: 100%; height: min(56vh, 460px); margin-top: var(--header-h); }
.section { max-width: var(--max-width); margin: 0 auto; padding: 48px 20px; }
.collection-title {
  font-family: var(--font-display); font-size: 32px; letter-spacing: .5px;
  margin-bottom: 18px; display: flex; align-items: baseline; gap: 12px;
}
.collection-title small { font-family: var(--font-body); font-size: 13px; color: var(--text-dim); font-weight: 500; }
.divider { height: 2px; background: var(--gradient); border: none; margin: 40px 0; opacity: .6; }
.site-footer { text-align: center; color: var(--text-faint); font-size: 13px; padding: 40px 20px 60px; }

/* ---------- Product rail / card ---------- */
.rail { display: flex; gap: 16px; overflow-x: auto; padding: 4px 4px 12px; scroll-snap-type: x proximity; }
.rail::-webkit-scrollbar { height: 6px; }
.rail::-webkit-scrollbar-thumb { background: var(--surface-2); border-radius: 3px; }
.product-card {
  flex: 0 0 auto; width: 190px; scroll-snap-align: start; cursor: pointer;
  background: none; border: none; padding: 0; text-align: left; color: inherit;
}
.product-swatch {
  width: 190px; height: 230px; border-radius: var(--radius);
  margin-bottom: 10px; transition: transform .25s ease;
}
.product-card:hover .product-swatch { transform: translateY(-4px); }
.product-name { font-weight: 600; font-size: 15px; }
.product-price { color: var(--text-dim); font-size: 14px; margin-top: 2px; }

/* ---------- Product detail ---------- */
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.product-detail-swatch { width: 100%; aspect-ratio: 1; border-radius: var(--radius-lg); }
.product-detail-name { font-family: var(--font-display); font-size: 42px; letter-spacing: .5px; }
.product-detail-price { font-size: 19px; color: var(--text-dim); margin: 6px 0 26px; }
.field-label {
  font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .6px;
  color: var(--text-dim); margin-bottom: 10px; display: block;
}
.size-grid { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.size-btn {
  min-width: 52px; height: 44px; padding: 0 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font-weight: 600; cursor: pointer;
}
.size-btn.selected { border-color: var(--pink); background: rgba(255,46,136,.12); color: var(--pink); }
.qty-stepper {
  display: inline-flex; align-items: center; border: 1px solid var(--border);
  border-radius: var(--radius-sm); margin-bottom: 28px;
}
.qty-stepper button { width: 44px; height: 44px; background: none; border: none; color: var(--text); font-size: 18px; cursor: pointer; }
.qty-stepper span { min-width: 36px; text-align: center; font-weight: 600; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--surface-2); border: 1px solid var(--border); padding: 14px 22px;
  border-radius: var(--radius); display: flex; align-items: center; gap: 10px;
  opacity: 0; pointer-events: none; transition: all .25s ease; z-index: 300; max-width: 90vw;
}
.toast.active { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); flex-shrink: 0; }

/* ---------- Checkout ---------- */
.checkout-layout { display: grid; grid-template-columns: 1.3fr 1fr; gap: 56px; align-items: start; }
.checkout-summary {
  position: sticky; top: calc(var(--header-h) + 24px); background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 20px;
}
.summary-title { font-family: var(--font-display); font-size: 20px; letter-spacing: .5px; margin-bottom: 14px; }
.form-group { margin-bottom: 30px; }
.form-group-title { font-family: var(--font-display); font-size: 22px; letter-spacing: .5px; margin-bottom: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field { margin-bottom: 12px; }
.field input, .field select {
  width: 100%; background: var(--bg-soft); border: 1px solid var(--border); color: var(--text);
  padding: 13px 14px; border-radius: var(--radius-sm); font-family: var(--font-body); font-size: 14px;
}
.field select { appearance: none; }
.field input::placeholder { color: var(--text-faint); }
.field input:focus, .field select:focus { outline: none; border-color: var(--blue); }
.field.invalid input, .field.invalid select { border-color: var(--danger); background: rgba(255,84,112,.06); }
.field-optional { color: var(--text-faint); font-weight: 400; text-transform: none; letter-spacing: 0; }
.error-banner {
  background: rgba(255,84,112,.1); border: 1px solid var(--danger); color: var(--danger);
  padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 20px; font-size: 14px;
  font-weight: 500; display: none;
}
.error-banner.active { display: block; }

.shipping-options { display: flex; flex-direction: column; gap: 10px; }
.shipping-option {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 16px;
  cursor: pointer; display: flex; justify-content: space-between; align-items: center;
}
.shipping-option.selected { border-color: var(--pink); background: rgba(255,46,136,.06); }
.shipping-option-name { font-weight: 600; }
.shipping-option-date { color: var(--text-dim); font-size: 13px; margin-top: 2px; }
.shipping-option-price { font-weight: 700; font-family: var(--font-display); font-size: 18px; }

/* ---------- Payment ---------- */
.order-number-badge {
  display: inline-block; font-size: 13px; color: var(--text-dim); background: var(--surface-2);
  padding: 6px 12px; border-radius: 20px; margin-bottom: 8px;
}
.summary-row { display: flex; justify-content: space-between; padding: 8px 0; font-size: 14px; color: var(--text-dim); }
.summary-row.total {
  color: var(--text); font-weight: 700; font-size: 18px; border-top: 1px solid var(--border);
  margin-top: 8px; padding-top: 14px;
}
.payment-methods { display: flex; flex-direction: column; gap: 12px; margin: 24px 0; }
.payment-method { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.payment-method.selected { border-color: var(--pink); }
.payment-method-head {
  padding: 16px; display: flex; justify-content: space-between; align-items: center;
  cursor: pointer; font-weight: 600;
}
.payment-method.selected .payment-method-head { color: var(--pink); }
.payment-method-body {
  padding: 0 16px; max-height: 0; overflow: hidden; transition: all .25s ease;
  color: var(--text-dim); font-size: 14px; line-height: 1.6;
}
.payment-method.open .payment-method-body { padding: 0 16px 16px; max-height: 200px; }
.selected-payment-banner {
  background: var(--surface-2); border-radius: var(--radius-sm); padding: 14px 16px;
  margin-bottom: 16px; font-size: 14px; display: none; font-weight: 600;
}
.selected-payment-banner.active { display: block; }
.place-order-note { color: var(--text-faint); font-size: 12px; margin-top: 12px; line-height: 1.5; }

/* ---------- Sizing guide ---------- */
.sizing-rect { width: 100%; max-width: 720px; height: 420px; border-radius: var(--radius); margin: 0 auto; }

/* ---------- Confirmation ---------- */
.confirmation { text-align: center; padding: 90px 20px; max-width: 480px; margin: 0 auto; }
.confirmation-icon { width: 64px; height: 64px; border-radius: 50%; background: var(--gradient); margin: 0 auto 24px; }
.confirmation h1 { font-family: var(--font-display); font-size: 36px; margin-bottom: 12px; letter-spacing: .5px; }
.confirmation p { color: var(--text-dim); margin-bottom: 32px; line-height: 1.6; }

/* ---------- View switching ---------- */
.view { display: none; }
.view.active { display: block; animation: fadeIn .3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .product-detail { grid-template-columns: 1fr; }
  .checkout-layout { grid-template-columns: 1fr; }
  .checkout-summary { position: static; order: -1; }
  .form-row { grid-template-columns: 1fr; }
  .cart-drawer, .side-menu { width: 100%; max-width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}