:root {
  --primary: #922041;
  --primary-dark: #7a1a35;
  --primary-soft: #fdf2f5;
  --success: #16a34a;
  --background: #f5f5f4;
  --foreground: #1c1917;
  --muted: #78716c;
  --border: #e7e5e4;
  --white: #ffffff;
  --danger: #dc2626;
  --radius: 16px;
  --font: "Poppins", "Segoe UI", sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--background);
  color: var(--foreground);
  min-height: 100dvh;
  padding-bottom: 88px;
}

/* Header */
.product-header {
  background: var(--primary);
  padding: 12px 16px;
  position: sticky;
  top: 0;
  z-index: 40;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.15);
  color: var(--white);
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 8px 16px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
}

.btn-back svg { width: 18px; height: 18px; }

/* Main */
.product-main {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Hero card */
.product-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.product-image-wrap {
  aspect-ratio: 1;
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.product-image-wrap img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.product-info {
  padding: 16px 20px 20px;
}

.product-info h1 {
  font-size: 22px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 8px;
}

.product-info .description {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.5;
  margin-bottom: 12px;
}

.price-row { margin-bottom: 10px; }

.price-old {
  font-size: 13px;
  color: var(--muted);
  text-decoration: line-through;
}

.price-current {
  font-size: 28px;
  font-weight: 800;
  color: var(--success);
  line-height: 1.1;
}

.discount-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--primary);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  margin-top: 6px;
}

/* Accordion sections */
.option-section,
.notes-section {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 1px 6px rgba(0,0,0,0.04);
}

.option-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  cursor: pointer;
  user-select: none;
  gap: 12px;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.option-header-left h2 {
  font-size: 16px;
  font-weight: 700;
}

.option-header-left p {
  font-size: 13px;
  color: var(--muted);
  margin-top: 2px;
}

.option-header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.counter-badge {
  background: var(--foreground);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  min-width: 36px;
  text-align: center;
}

.check-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #d6d3d1;
  transition: all 0.2s;
}

.check-icon.done {
  background: var(--success);
  color: var(--white);
}

.chevron {
  width: 20px;
  height: 20px;
  color: var(--muted);
  transition: transform 0.2s;
}

.option-section.open .chevron { transform: rotate(180deg); }

.option-body {
  display: none;
  border-top: 1px solid var(--border);
}

.option-section.open .option-body { display: block; }

/* Radio options */
.radio-option {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}

.radio-option:last-child { border-bottom: none; }

.radio-option input { display: none; }

.radio-circle {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid #d6d3d1;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.radio-option input:checked + .radio-circle {
  border-color: var(--primary);
}

.radio-option input:checked + .radio-circle::after {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
}

.radio-label { font-size: 15px; font-weight: 500; }

/* Extra items */
.extra-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}

.extra-item:last-child { border-bottom: none; }

.extra-info h3 { font-size: 14px; font-weight: 600; }

.extra-info p {
  font-size: 12px;
  color: var(--success);
  font-weight: 600;
  margin-top: 2px;
}

.qty-control {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  background: var(--white);
}

.qty-btn {
  width: 36px;
  height: 36px;
  border: none;
  background: none;
  font-size: 18px;
  color: var(--muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qty-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.qty-value {
  min-width: 24px;
  text-align: center;
  font-size: 15px;
  font-weight: 700;
}

/* Notes */
.notes-section { padding: 16px 18px 18px; }

.notes-section h2 {
  font-size: 16px;
  font-weight: 700;
}

.notes-section p {
  font-size: 13px;
  color: var(--muted);
  margin: 4px 0 12px;
}

.notes-section textarea {
  width: 100%;
  min-height: 90px;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 14px;
  resize: vertical;
  outline: none;
}

.notes-section textarea:focus { border-color: var(--primary); }

.char-count {
  text-align: right;
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
}

/* Sticky footer */
.product-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--white);
  border-top: 1px solid var(--border);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 50;
  box-shadow: 0 -4px 16px rgba(0,0,0,0.06);
}

.footer-qty {
  display: flex;
  align-items: center;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  flex-shrink: 0;
}

.footer-qty .qty-btn { width: 40px; height: 44px; }

.footer-qty .qty-value { min-width: 28px; font-size: 16px; }

.btn-add {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: 999px;
  padding: 14px 20px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: filter 0.15s;
  gap: 8px;
}

.btn-add:hover:not(:disabled) { filter: brightness(1.05); }

.btn-add:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-add-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-add svg { width: 20px; height: 20px; }

.btn-add-price { font-size: 16px; font-weight: 800; }

/* Toast */
.toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--foreground);
  color: var(--white);
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s;
  z-index: 60;
  white-space: nowrap;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Cart drawer */
.cart-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 70;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}

.cart-overlay.open { opacity: 1; pointer-events: auto; }

.cart-drawer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-height: 85dvh;
  background: var(--white);
  border-radius: 20px 20px 0 0;
  z-index: 80;
  transform: translateY(100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
}

.cart-drawer.open { transform: translateY(0); }

.cart-header {
  background: var(--primary);
  color: var(--white);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-radius: 20px 20px 0 0;
}

.cart-header h2 {
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cart-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.15);
  color: var(--white);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cart-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
}

.cart-item {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.cart-item img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  border-radius: 8px;
  background: #fafaf9;
}

.cart-item-info { flex: 1; }

.cart-item-info h3 { font-size: 14px; font-weight: 700; }

.cart-item-info p { font-size: 12px; color: var(--muted); margin-top: 2px; }

.cart-item-price {
  font-size: 15px;
  font-weight: 800;
  color: var(--success);
  margin-top: 4px;
}

.cart-item-remove {
  flex-shrink: 0;
  align-self: flex-start;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background: #fef2f2;
  color: #dc2626;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease;
}

.cart-item-remove:hover {
  background: #fee2e2;
}

.cart-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--muted);
}

.cart-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.cart-total {
  display: flex;
  justify-content: space-between;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}

.btn-checkout {
  width: 100%;
  background: var(--success);
  color: var(--white);
  border: none;
  border-radius: 999px;
  padding: 14px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

.btn-continue {
  width: 100%;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 13px;
  margin-top: 8px;
  cursor: pointer;
  padding: 8px;
}

.cart-fab {
  position: fixed;
  bottom: 100px;
  right: 16px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  border: none;
  box-shadow: 0 4px 16px rgba(146,32,65,0.4);
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 45;
}

.cart-fab.visible { display: flex; }

.cart-fab-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  background: var(--danger);
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (min-width: 481px) {
  .product-footer {
    max-width: 480px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 16px 16px 0 0;
  }
}