:root {
  --bg: #ffffff;
  --surface: #fafafa;
  --line: #e9e9e9;
  --text: #111111;
  --muted: #6f6f6f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Manrope', sans-serif;
  color: var(--text);
  background: var(--bg);
}

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

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

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--line);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.header-inner {
  min-height: 84px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark-wrap {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.brand-mark {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

.brand-mark-silhouette {
  transform: scale(1.34);
  filter: brightness(0) saturate(100%);
  opacity: 0.95;
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  gap: 24px;
  font-size: 0.88rem;
  color: var(--muted);
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--muted);
  transition: color 0.2s ease;
  white-space: nowrap;
}

.social-link:hover {
  color: var(--text);
}

.social-link svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.intro {
  max-width: 760px;
  padding: 72px 0 44px;
}

.intro-kicker,
.section-label {
  margin: 0 0 12px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.intro h1 {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.intro-text,
.product-description,
.simple-info p,
.footer-inner {
  color: var(--muted);
}

.intro-text {
  max-width: 640px;
  margin: 22px 0 0;
  font-size: 1.02rem;
  line-height: 1.8;
}

.product-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 44px;
  align-items: start;
}

.media-frame,
.purchase-box,
.simple-info article {
  border: 1px solid var(--line);
  background: var(--surface);
}

.media-frame {
  position: relative;
  padding: 28px;
  perspective: 1400px;
  overflow: hidden;
  cursor: zoom-in;
}

.media-frame::after {
  content: '';
  position: absolute;
  inset: 18% 12%;
  background: radial-gradient(circle, rgba(17, 17, 17, 0.08), transparent 60%);
  filter: blur(26px);
  pointer-events: none;
}

.product-stage-inner {
  position: relative;
  transition: transform 0.18s ease-out;
  transform-style: preserve-3d;
  will-change: transform;
}

#product-image {
  width: 100%;
  height: auto;
  object-fit: contain;
  transform: translateZ(42px);
  filter: drop-shadow(0 18px 28px rgba(0, 0, 0, 0.12));
}

.image-action {
  margin-top: 14px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

.image-action:hover {
  color: var(--text);
}

.product-info {
  padding-top: 8px;
}

.product-info h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.product-description {
  margin: 18px 0 0;
  font-size: 1rem;
  line-height: 1.8;
}

.price {
  margin-top: 22px;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.05em;
}

.product-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.product-notes span {
  padding: 10px 14px;
  border: 1px solid var(--line);
  font-size: 0.84rem;
  color: var(--muted);
  background: #fff;
}

.purchase-box {
  margin-top: 28px;
  padding: 24px;
}

.form-group + .form-group {
  margin-top: 18px;
}

label {
  display: block;
  margin-bottom: 10px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.select,
.quantity-input {
  width: 100%;
  min-height: 54px;
  padding: 0 14px;
  border: 1px solid #dcdcdc;
  background: #fff;
  color: var(--text);
  font: inherit;
}

.btn {
  width: 100%;
  min-height: 56px;
  margin-top: 22px;
  border: none;
  background: #111111;
  color: #ffffff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.message {
  min-height: 22px;
  margin-top: 12px;
  color: #b42318;
  font-size: 0.92rem;
}

.simple-info {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  padding: 56px 0 80px;
}

.simple-info article {
  padding: 22px;
}

.simple-info p:last-child {
  margin: 0;
  line-height: 1.8;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer-inner {
  min-height: 70px;
  font-size: 0.88rem;
}

.image-viewer[hidden] {
  display: none;
}

.image-viewer {
  position: fixed;
  inset: 0;
  z-index: 50;
}

.image-viewer-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.94);
}

.image-viewer-panel {
  position: relative;
  z-index: 1;
  width: min(1200px, calc(100% - 32px));
  height: min(92vh, 920px);
  margin: 4vh auto;
  border: 1px solid var(--line);
  background: #fff;
  overflow: hidden;
}

.viewer-close {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 2;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.viewer-toolbar {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  display: flex;
  gap: 8px;
}

.viewer-tool {
  min-width: 52px;
  height: 42px;
  padding: 0 12px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

.viewer-stage {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  cursor: grab;
}

.viewer-stage.is-dragging {
  cursor: grabbing;
}

#viewer-image {
  max-width: none;
  width: min(760px, 80vw);
  user-select: none;
  -webkit-user-drag: none;
  transform-origin: center center;
  will-change: transform;
}

.center {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  text-align: center;
  padding: 90px 0;
}

.center h2 {
  margin: 0 0 16px;
  font-size: clamp(2.4rem, 5vw, 4rem);
  letter-spacing: -0.04em;
}

.center p {
  margin: 0 0 26px;
  color: var(--muted);
  line-height: 1.8;
}

@media (max-width: 900px) {
  .product-layout,
  .simple-info {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .header-inner,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 18px 0;
  }

  .nav {
    gap: 16px;
  }

  .social-link {
    font-size: 0.82rem;
  }

  .brand-mark-wrap {
    width: 46px;
    height: 46px;
  }

  .intro {
    padding: 42px 0 28px;
  }

  .media-frame,
  .purchase-box,
  .simple-info article {
    padding: 18px;
  }

  .image-viewer-panel {
    width: calc(100% - 16px);
    height: 92vh;
    margin: 4vh auto;
  }
}