/* =========================================================
   menu4 — каталог кухни + корзина
   ========================================================= */

:root {
  --red: #c8102e;
  --red-hot: #e11d3a;
  --red-deep: #8f0b20;
  --ink: #0a0a0c;
  --paper: #fff;
  --sand: #f3eee6;
  --sand-2: #e8dfd2;
  --muted: rgba(10, 10, 12, 0.58);
  --line: rgba(10, 10, 12, 0.12);
  --pad: clamp(1rem, 3.5vw, 2.25rem);
  --font: "Manrope", "Segoe UI", system-ui, sans-serif;
  --display: "Bebas Neue", Impact, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max: 1180px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body.menu4 {
  margin: 0;
  min-height: 100svh;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(200, 16, 46, 0.08), transparent 55%),
    linear-gradient(180deg, #faf7f2 0%, var(--sand) 40%, #efe6da 100%);
  line-height: 1.5;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: 0;
  cursor: pointer;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Header */
.m4-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem var(--pad);
  background: rgba(10, 10, 12, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: #fff;
}

.m4-logo .logo-img {
  width: auto;
  height: clamp(1.7rem, 3vw, 2.15rem);
  filter:
    drop-shadow(0 0 1px rgba(255, 255, 255, 0.7))
    drop-shadow(0 0 8px rgba(200, 16, 46, 0.3));
}

.m4-header-meta {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.m4-link,
.m4-phone {
  font-size: 0.88rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.78);
}

.m4-phone {
  color: #fff;
}

.m4-cart-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: var(--red);
  color: #fff;
  font-weight: 800;
  font-size: 0.88rem;
  position: relative;
  transition: background 0.2s, transform 0.2s var(--ease);
}

.m4-cart-btn:hover {
  background: var(--red-hot);
  transform: translateY(-1px);
}

.m4-cart-btn svg {
  width: 1.15rem;
  height: 1.15rem;
}

.m4-cart-btn em {
  position: absolute;
  top: -0.35rem;
  right: -0.25rem;
  min-width: 1.25rem;
  height: 1.25rem;
  padding: 0 0.3rem;
  border-radius: 999px;
  background: #fff;
  color: var(--red);
  font-style: normal;
  font-size: 0.72rem;
  font-weight: 800;
  display: grid;
  place-items: center;
}

/* Hero */
.m4-main {
  padding-bottom: 3rem;
}

.m4-hero {
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: clamp(1.75rem, 4vw, 2.75rem) var(--pad) 1.25rem;
  display: grid;
  gap: 1rem;
  grid-template-columns: 1.4fr 0.8fr;
  align-items: end;
}

.m4-eyebrow {
  margin: 0 0 0.35rem;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red);
}

.m4-hero h1 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2.6rem, 7vw, 4.2rem);
  letter-spacing: 0.02em;
  line-height: 0.95;
  text-transform: uppercase;
}

.m4-hero-copy p:last-child {
  margin: 0.75rem 0 0;
  max-width: 38rem;
  color: var(--muted);
  font-weight: 600;
}

.m4-hero-note {
  display: grid;
  gap: 0.35rem;
  padding: 1rem 1.1rem;
  border-radius: 1rem;
  background: rgba(200, 16, 46, 0.08);
  border: 1px solid rgba(200, 16, 46, 0.18);
}

.m4-hero-note strong {
  font-size: 0.95rem;
}

.m4-hero-note span {
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 600;
}

/* Shop layout: sidebar + catalog */
.m4-shop {
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 0.5rem var(--pad) 0;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 1.25rem 1.5rem;
  align-items: start;
}

.m4-sidebar-sticky {
  position: sticky;
  top: 6.5rem;
  display: grid;
  gap: 0.75rem;
  padding: 1rem;
  border-radius: 1.15rem;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  box-shadow: 0 10px 28px rgba(20, 12, 8, 0.04);
}

.m4-sidebar-title {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.m4-search-wrap input {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border-radius: 0.75rem;
  border: 1px solid var(--line);
  background: #fff;
  outline: none;
  font-size: 0.9rem;
}

.m4-search-wrap input:focus {
  border-color: rgba(200, 16, 46, 0.45);
  box-shadow: 0 0 0 3px rgba(200, 16, 46, 0.12);
}

.m4-filters {
  display: grid;
  gap: 0.35rem;
}

.m4-filter {
  width: 100%;
  text-align: left;
  padding: 0.55rem 0.75rem;
  border-radius: 0.7rem;
  border: 1px solid transparent;
  background: transparent;
  font-size: 0.9rem;
  font-weight: 700;
  color: rgba(10, 10, 12, 0.72);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.m4-filter.is-active,
.m4-filter:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.m4-count {
  margin: 0.15rem 0 0;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
}

/* Grid */
.m4-catalog {
  min-width: 0;
}

.m4-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.m4-card {
  display: grid;
  grid-template-rows: auto 1fr;
  border-radius: 1.15rem;
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(13, 13, 15, 0.08);
  box-shadow: 0 10px 28px rgba(20, 12, 8, 0.05);
  transition: transform 0.25s var(--ease), box-shadow 0.25s;
}

.m4-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 36px rgba(20, 12, 8, 0.1);
}

.m4-cart-btn.is-bump {
  animation: m4CartBump 0.45s var(--ease);
}

@keyframes m4CartBump {
  0% { transform: scale(1); }
  35% { transform: scale(1.14); }
  70% { transform: scale(0.94); }
  100% { transform: scale(1); }
}

.m4-fly {
  position: fixed;
  z-index: 120;
  pointer-events: none;
  border-radius: 999px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  border: 2px solid #fff;
}

.m4-fly img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.m4-card-media {
  display: block;
  position: relative;
  aspect-ratio: 4 / 3;
  background:
    radial-gradient(ellipse 80% 70% at 50% 40%, rgba(255, 255, 255, 0.55), transparent 70%),
    linear-gradient(160deg, #efe6da 0%, #e4d8c8 100%);
  overflow: hidden;
}

.m4-card-badge {
  position: absolute;
  right: 0.7rem;
  top: 0.7rem;
  z-index: 1;
  padding: 0.28rem 0.55rem;
  border-radius: 999px;
  background: var(--red);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.m4-card-body h3 a {
  color: inherit;
}

.m4-card-body h3 a:hover {
  color: var(--red);
}

.m4-add {
  text-decoration: none;
}

/* Product page */
.m4-product-status {
  width: min(100%, var(--max));
  margin: 2rem auto;
  padding: 0 var(--pad);
  font-weight: 700;
  color: var(--muted);
}

.m4-product {
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 1.25rem var(--pad) 2rem;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 1.5rem 2rem;
  align-items: start;
}

.m4-product-media {
  border-radius: 1.25rem;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 70% at 50% 40%, rgba(255, 255, 255, 0.55), transparent 70%),
    linear-gradient(160deg, #efe6da 0%, #e4d8c8 100%);
  aspect-ratio: 4 / 3;
  box-shadow: 0 16px 40px rgba(20, 12, 8, 0.08);
}

.m4-product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.m4-product-cat {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--red);
}

.m4-product-body h1 {
  margin: 0;
  font-family: var(--font);
  font-size: clamp(1.55rem, 3.5vw, 2.2rem);
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.15;
}

.m4-product-desc {
  margin: 0.85rem 0 0;
  color: var(--muted);
  font-weight: 600;
  line-height: 1.55;
}

.m4-product-buy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
  margin-top: 1.25rem;
}

.m4-product-price {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.m4-product-hint {
  margin: 0.55rem 0 0;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--red);
}

.m4-product-parent {
  margin: 1.25rem 0 0;
  font-size: 0.9rem;
  font-weight: 650;
  color: var(--muted);
}

.m4-product-parent a {
  color: var(--red);
  text-decoration: underline;
}

.m4-options {
  margin-top: 1.75rem;
}

.m4-options h2 {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.m4-options-list {
  display: grid;
  gap: 0.55rem;
}

.m4-option {
  display: grid;
  grid-template-columns: 4.2rem 1fr auto;
  gap: 0.75rem;
  align-items: center;
  width: 100%;
  padding: 0.55rem;
  border-radius: 0.95rem;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.75);
  text-align: left;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}

.m4-option:hover {
  border-color: rgba(200, 16, 46, 0.35);
  transform: translateY(-1px);
}

.m4-option.is-active {
  border-color: var(--red);
  background: rgba(200, 16, 46, 0.08);
  box-shadow: 0 0 0 2px rgba(200, 16, 46, 0.12);
}

.m4-option img {
  width: 4.2rem;
  height: 4.2rem;
  border-radius: 0.65rem;
  object-fit: cover;
  object-position: center;
  display: block;
  background: linear-gradient(160deg, #efe6da 0%, #e4d8c8 100%);
}

.m4-option-copy {
  display: grid;
  gap: 0.2rem;
  min-width: 0;
}

.m4-option-copy strong {
  font-size: 0.95rem;
  font-weight: 800;
  line-height: 1.25;
}

.m4-option-copy small {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.m4-option em {
  font-style: normal;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  font-size: 0.92rem;
}

.m4-btn-primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

@media (max-width: 960px) {
  .m4-product {
    grid-template-columns: 1fr;
  }
}

.m4-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.45s var(--ease);
}

.m4-card:hover .m4-card-media img {
  transform: scale(1.04);
}

.m4-card-media.is-fallback img {
  opacity: 0.72;
  filter: saturate(0.85);
}

.m4-card-cat {
  position: absolute;
  left: 0.7rem;
  top: 0.7rem;
  padding: 0.28rem 0.55rem;
  border-radius: 999px;
  background: rgba(10, 10, 12, 0.72);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.m4-card-body {
  display: grid;
  gap: 0.55rem;
  padding: 0.95rem 1rem 1.05rem;
  align-content: start;
}

.m4-card-body h3 {
  margin: 0;
  font-family: var(--font);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.25;
  text-transform: none;
}

.m4-card-desc {
  margin: 0;
  font-size: 0.84rem;
  color: var(--muted);
  font-weight: 600;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 3.6em;
}

.m4-card-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: auto;
  padding-top: 0.25rem;
}

.m4-card-price {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.m4-add {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.4rem;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 800;
  transition: background 0.2s, transform 0.2s;
}

.m4-add:hover {
  background: var(--red);
  transform: translateY(-1px);
}

.m4-empty {
  margin: 2rem 0;
  text-align: center;
  color: var(--muted);
  font-weight: 700;
}

/* PDFs */
.m4-pdfs {
  width: min(100%, var(--max));
  margin: 2.5rem auto 0;
  padding: 0 var(--pad);
}

.m4-pdfs-head h2 {
  margin: 0;
  font-family: var(--display);
  font-size: 1.8rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.m4-pdfs-head p {
  margin: 0.35rem 0 0.9rem;
  color: var(--muted);
  font-weight: 600;
}

.m4-pdf-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.85rem;
}

.m4-pdf-card {
  display: grid;
  grid-template-rows: auto 1fr;
  border-radius: 1.15rem;
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(13, 13, 15, 0.08);
  box-shadow: 0 12px 30px rgba(20, 12, 8, 0.06);
  transition: transform 0.25s var(--ease), box-shadow 0.25s;
}

.m4-pdf-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgba(20, 12, 8, 0.12);
}

.m4-pdf-cover {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: linear-gradient(160deg, #efe6da 0%, #e4d8c8 100%);
}

.m4-pdf-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.45s var(--ease);
}

.m4-pdf-card:hover .m4-pdf-cover img {
  transform: scale(1.04);
}

.m4-pdf-badge {
  position: absolute;
  left: 0.65rem;
  top: 0.65rem;
  padding: 0.28rem 0.55rem;
  border-radius: 999px;
  background: rgba(10, 10, 12, 0.78);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.m4-pdf-body {
  display: grid;
  gap: 0.45rem;
  padding: 0.95rem 0.95rem 1rem;
  align-content: start;
}

.m4-pdf-body h3 {
  margin: 0;
  font-family: var(--display);
  font-size: 1.45rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  line-height: 1;
}

.m4-pdf-body p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 600;
  line-height: 1.35;
  min-height: 2.2em;
}

.m4-pdf-meta {
  font-size: 0.72rem;
  font-weight: 700;
  color: rgba(10, 10, 12, 0.45);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.m4-pdf-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
  margin-top: 0.25rem;
}

.m4-pdf-open,
.m4-pdf-dl {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.35rem;
  padding: 0.45rem 0.65rem;
  border-radius: 0.75rem;
  font-size: 0.78rem;
  font-weight: 800;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.m4-pdf-open {
  background: var(--ink);
  color: #fff;
}

.m4-pdf-open:hover {
  background: var(--red);
}

.m4-pdf-dl {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.8);
}

.m4-pdf-dl:hover {
  border-color: rgba(200, 16, 46, 0.35);
  color: var(--red);
}

.m4-pdf-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 1.25rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.65);
  border: 1px dashed var(--line);
  text-align: center;
  color: var(--muted);
  font-weight: 700;
}

/* Drawer */
.m4-drawer[hidden] {
  display: none !important;
}

.m4-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(8, 8, 10, 0.5);
  z-index: 50;
}

.m4-drawer-panel {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 60;
  width: min(100%, 420px);
  height: 100%;
  background: #111114;
  color: #fff;
  display: flex;
  flex-direction: column;
  box-shadow: -20px 0 50px rgba(0, 0, 0, 0.35);
  animation: drawerIn 0.28s var(--ease);
}

@keyframes drawerIn {
  from {
    transform: translateX(12%);
    opacity: 0.6;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.m4-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  flex: 0 0 auto;
}

.m4-drawer-head h2 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 800;
}

.m4-icon-btn {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  font-size: 1.4rem;
  line-height: 1;
}

.m4-drawer-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

.m4-cart-list {
  padding: 0.75rem 1.1rem;
  display: grid;
  gap: 0.65rem;
  align-content: start;
}

.m4-cart-empty {
  margin: 1.5rem 1.1rem;
  color: rgba(255, 255, 255, 0.55);
  font-weight: 600;
}

.m4-cart-item {
  display: grid;
  grid-template-columns: 3.4rem 1fr auto;
  gap: 0.7rem;
  align-items: center;
  padding: 0.55rem;
  border-radius: 0.85rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.m4-cart-item img {
  width: 3.4rem;
  height: 3.4rem;
  border-radius: 0.55rem;
  object-fit: cover;
  object-position: center;
  display: block;
  background: linear-gradient(160deg, #efe6da 0%, #e4d8c8 100%);
}

.m4-cart-item strong {
  display: block;
  font-size: 0.9rem;
  line-height: 1.25;
}

.m4-cart-item small {
  color: rgba(255, 255, 255, 0.55);
  font-weight: 650;
}

.m4-qty {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: 0.35rem;
}

.m4-qty button {
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 0.45rem;
  background: rgba(255, 255, 255, 0.1);
  font-weight: 800;
}

.m4-qty span {
  min-width: 1.2rem;
  text-align: center;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.m4-cart-item-sum {
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.m4-cart-footer {
  padding: 0.9rem 1.1rem 1.2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background: #0c0c0f;
}

.m4-cart-checkout {
  width: 100%;
  margin-top: 0.35rem;
}

.m4-cart-total {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.85rem;
  font-weight: 700;
}

.m4-cart-total strong {
  font-size: 1.35rem;
  font-weight: 800;
}

.m4-order {
  display: grid;
  gap: 0.55rem;
}

.m4-order label {
  display: grid;
  gap: 0.3rem;
}

.m4-order label > span {
  font-size: 0.75rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.m4-order input,
.m4-order textarea {
  width: 100%;
  padding: 0.7rem 0.8rem;
  border-radius: 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  outline: none;
  resize: vertical;
}

.m4-order input:focus,
.m4-order textarea:focus {
  border-color: rgba(225, 29, 58, 0.55);
}

.m4-consent {
  grid-template-columns: auto 1fr !important;
  gap: 0.55rem !important;
  align-items: start;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.65);
}

.m4-consent a {
  color: #ff8fa0;
  text-decoration: underline;
}

.m4-order-error {
  margin: 0;
  color: #ff8fa0;
  font-size: 0.85rem;
  font-weight: 700;
}

.m4-order-actions {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.m4-btn-primary,
.m4-btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.7rem;
  padding: 0.65rem 0.9rem;
  border-radius: 0.85rem;
  font-weight: 800;
  font-size: 0.9rem;
}

.m4-btn-primary {
  background: var(--red);
  color: #fff;
}

.m4-btn-primary:hover {
  background: var(--red-hot);
}

.m4-btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #fff;
}

.m4-btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.4);
}

/* Toast / footer */
.m4-toast {
  position: fixed;
  left: 50%;
  bottom: 1.25rem;
  transform: translateX(-50%);
  z-index: 80;
  max-width: min(92vw, 420px);
  padding: 0.85rem 1.1rem;
  border-radius: 0.9rem;
  background: #111;
  color: #fff;
  font-weight: 700;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.m4-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.25rem;
  justify-content: center;
  padding: 1.5rem var(--pad) 2rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: rgba(10, 10, 12, 0.55);
}

.m4-footer a:hover {
  color: var(--red);
}

@media (max-width: 1100px) {
  .m4-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .m4-pdf-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .m4-hero {
    grid-template-columns: 1fr;
  }

  .m4-shop {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .m4-sidebar-sticky {
    position: sticky;
    top: 6.2rem;
    z-index: 15;
    backdrop-filter: blur(10px);
    background: rgba(250, 247, 242, 0.94);
  }

  .m4-filters {
    display: flex;
    flex-wrap: nowrap;
    gap: 0.4rem;
    overflow-x: auto;
    padding-bottom: 0.1rem;
    scrollbar-width: thin;
  }

  .m4-filter {
    width: auto;
    flex: 0 0 auto;
    border-radius: 999px;
    border-color: var(--line);
    background: rgba(255, 255, 255, 0.8);
    white-space: nowrap;
  }
}

@media (max-width: 640px) {
  .m4-link {
    display: none;
  }

  .m4-cart-btn span {
    display: none;
  }

  .m4-grid {
    grid-template-columns: 1fr;
  }

  .m4-pdf-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .m4-sidebar-sticky {
    top: 6rem;
    padding: 0.85rem;
  }

  .m4-card-desc {
    -webkit-line-clamp: 2;
    min-height: 0;
  }

  .m4-order-actions {
    grid-template-columns: 1fr;
  }

  .m4-pdf-grid {
    grid-template-columns: 1fr;
  }
}