/* ===========================================================================
   STYLE 06 — COMMERCE / 실전 판매형 PDP
   스마트스토어·쿠팡에 그대로 올릴 수 있는 구조. 갤러리 → 옵션 → 탭 → 상세 → 고정 구매바.
   =========================================================================== */

:root {
  --k-page: 900px;
  --k-read: 700px;

  --k-bg: #ffffff;
  --k-surface: #f7f6f3;
  --k-fg: #191512;
  --k-muted: #6f6a62;
  --k-line: #e6e3dd;
  --k-accent: #c8291b;
  --k-accent-soft: #fdeeec;
  --k-on-accent: #ffffff;

  --k-sans: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --k-serif: var(--k-sans);
  --k-display: var(--k-sans);

  --k-section: clamp(52px, 6.4vw, 88px);
  --k-radius: 10px;
  --sale: #c8291b;
  --ok: #237a4a;
}

body {
  background: #eeece7;
  color: var(--k-fg);
  font-family: var(--k-sans);
  line-height: 1.78;
  letter-spacing: -0.018em;
  padding-bottom: 84px;
}

.k-page {
  box-shadow: 0 0 40px rgba(25, 21, 18, 0.08);
}

/* ------------------------------------------------------------------ 상단 바 */
.gnb {
  position: sticky;
  top: 0;
  z-index: 70;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 20px;
  border-bottom: 1px solid var(--k-line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.gnb__logo {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.gnb__logo span {
  color: var(--k-accent);
}

.gnb__cs {
  font-size: 12px;
  font-weight: 600;
  color: var(--k-muted);
}

.gnb__cs b {
  color: var(--k-accent);
}

/* ------------------------------------------------------------------ 상품 영역 */
.pdp {
  padding: 24px 20px 34px;
}

.gallery__main {
  position: relative;
  overflow: hidden;
  border-radius: var(--k-radius);
  background: var(--k-surface);
  aspect-ratio: 1;
}

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

.gallery__flag {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  display: flex;
  gap: 6px;
}

.flag {
  padding: 5px 10px;
  border-radius: 5px;
  background: var(--k-accent);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.flag--dark {
  background: var(--k-fg);
}

.gallery__thumbs {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-top: 8px;
}

.gallery__thumbs button {
  overflow: hidden;
  border-radius: 7px;
  aspect-ratio: 1;
  background: var(--k-surface);
  outline: 2px solid transparent;
  outline-offset: -2px;
  transition: outline-color 0.2s;
}

.gallery__thumbs button.is-active {
  outline-color: var(--k-fg);
}

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

/* ------------------------------------------------------------------ 정보 -->*/
.buy {
  margin-top: 28px;
}

.buy__brand {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--k-accent);
}

.buy__name {
  margin-top: 8px;
  font-size: clamp(21px, 3.2vw, 28px);
  font-weight: 800;
  line-height: 1.36;
  letter-spacing: -0.04em;
}

.buy__catch {
  margin-top: 8px;
  font-size: 14px;
  color: var(--k-muted);
}

.buy__rate {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  font-size: 13px;
}

.buy__rate .stars {
  color: var(--k-accent);
  letter-spacing: 0.1em;
}

.buy__rate a {
  color: var(--k-muted);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.price {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--k-line);
}

.price__off {
  font-size: clamp(24px, 3.4vw, 30px);
  font-weight: 800;
  color: var(--sale);
  letter-spacing: -0.04em;
}

.price__now {
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 800;
  letter-spacing: -0.045em;
}

.price__list {
  font-size: 15px;
  color: #a9a29a;
  text-decoration: line-through;
}

.benefit {
  display: grid;
  gap: 0;
  margin-top: 20px;
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius);
  overflow: hidden;
}

.benefit__row {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--k-line);
  font-size: 13.5px;
}

.benefit__row:last-child {
  border-bottom: 0;
}

.benefit__row dt {
  color: var(--k-muted);
}

.benefit__row dd {
  margin: 0;
}

.benefit__row dd b {
  color: var(--ok);
}

/* 옵션 */
.opts {
  margin-top: 26px;
}

.opts__label {
  font-size: 13px;
  font-weight: 700;
}

.opts__grid {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.opt {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius);
  background: #fff;
  text-align: left;
  transition: border-color 0.2s, background 0.2s;
}

.opt:hover {
  border-color: #b9b2a8;
}

.opt.is-active {
  border-color: var(--k-fg);
  border-width: 2px;
  background: var(--k-surface);
}

.opt__label {
  font-size: 14.5px;
  font-weight: 700;
}

.opt__badge {
  margin-left: 8px;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--k-accent);
  color: #fff;
  font-size: 10.5px;
  font-weight: 700;
  vertical-align: 2px;
}

.opt__price {
  font-size: 14.5px;
  font-weight: 800;
  letter-spacing: -0.03em;
  white-space: nowrap;
}

.opt__price s {
  display: block;
  font-size: 11.5px;
  font-weight: 500;
  color: #a9a29a;
}

/* 수량 */
.qty {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 18px;
  padding: 14px 16px;
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius);
}

.qty__label {
  font-size: 13.5px;
  color: var(--k-muted);
}

.qty__ctrl {
  display: flex;
  align-items: center;
  gap: 2px;
  border: 1px solid var(--k-line);
  border-radius: 7px;
  overflow: hidden;
}

.qty__ctrl button {
  width: 36px;
  height: 34px;
  background: var(--k-surface);
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
}

.qty__ctrl button:hover {
  background: #ecebe6;
}

.qty__ctrl span {
  min-width: 44px;
  text-align: center;
  font-size: 14.5px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* 합계 */
.total {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 2px solid var(--k-fg);
}

.total__label {
  font-size: 14px;
  font-weight: 700;
}

.total__sum {
  font-size: clamp(24px, 3.6vw, 32px);
  font-weight: 800;
  letter-spacing: -0.045em;
  color: var(--sale);
}

.cta {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 8px;
  margin-top: 16px;
}

.btn {
  display: grid;
  place-items: center;
  padding: 17px 12px;
  border-radius: var(--k-radius);
  font-size: 15.5px;
  font-weight: 800;
  letter-spacing: -0.03em;
  transition: filter 0.2s, background 0.2s;
}

.btn:hover {
  filter: brightness(0.94);
}

.btn--ghost {
  border: 1.5px solid var(--k-fg);
  color: var(--k-fg);
  background: #fff;
}

.btn--primary {
  background: var(--k-accent);
  color: #fff;
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 20px;
}

.trust-chip {
  padding: 12px 8px;
  border-radius: var(--k-radius);
  background: var(--k-surface);
  text-align: center;
  font-size: 11.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--k-muted);
}

.trust-chip b {
  display: block;
  font-size: 13px;
  color: var(--k-fg);
}

/* ------------------------------------------------------------------ 탭 */
.tabs {
  position: sticky;
  top: 47px;
  z-index: 60;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-block: 1px solid var(--k-line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
}

.tabs button {
  position: relative;
  padding: 15px 6px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--k-muted);
  letter-spacing: -0.02em;
}

.tabs button.is-active {
  color: var(--k-fg);
}

.tabs button.is-active::after {
  content: '';
  position: absolute;
  inset: auto 0 -1px 0;
  height: 2px;
  background: var(--k-fg);
}

.tabs button span {
  font-size: 11.5px;
  color: var(--k-accent);
  margin-left: 3px;
}

/* ------------------------------------------------------------------ 상세 섹션 */
.sec {
  padding: var(--k-section) 20px;
  border-bottom: 1px solid var(--k-line);
}

.sec--tint {
  background: var(--k-surface);
}

.sec__no {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--k-accent);
  text-transform: uppercase;
}

.sec__title {
  margin-top: 10px;
  font-size: clamp(22px, 3.4vw, 31px);
  font-weight: 800;
  line-height: 1.34;
  letter-spacing: -0.045em;
}

.sec__title span {
  color: var(--k-accent);
}

.sec__dek {
  max-width: 46ch;
  margin-top: 14px;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--k-muted);
}

.sec--center {
  text-align: center;
}

.sec--center .sec__dek {
  margin-inline: auto;
}

.sec__head {
  margin-bottom: 34px;
}

/* 강조 배너 */
.hl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.hl__item {
  padding: 22px 16px;
  border-radius: var(--k-radius);
  background: #fff;
  border: 1px solid var(--k-line);
  text-align: center;
}

.hl__ico {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--k-accent);
}

.hl__title {
  margin-top: 8px;
  font-size: 15.5px;
  font-weight: 800;
  letter-spacing: -0.035em;
}

.hl__desc {
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.72;
  color: var(--k-muted);
}

.notice-box {
  margin-top: 24px;
  padding: 16px 18px;
  border-radius: var(--k-radius);
  border: 1px solid #f0d6d2;
  background: var(--k-accent-soft);
  font-size: 13px;
  line-height: 1.8;
  color: #8f2318;
}

.notice-box b {
  font-weight: 800;
}

/* ------------------------------------------------------------------ 공통 블록 톤 */
.k-ph {
  border-radius: var(--k-radius);
  background: var(--k-surface);
}

.k-ing__name,
.k-promise__title,
.k-age__title,
.k-serve__title,
.k-item__name,
.k-step__title,
.k-ship__title,
.k-storage__title,
.k-cert__name,
.k-gift__name,
.k-review__title,
.k-faq__q {
  font-family: var(--k-sans);
  font-weight: 800;
  letter-spacing: -0.04em;
}

.k-lineup {
  grid-template-columns: repeat(3, 1fr);
  gap: 18px 12px;
}

.k-item__tag {
  border-radius: 4px;
}

.k-process,
.k-ings,
.k-ship,
.k-serving,
.k-storage,
.k-aging {
  grid-template-columns: repeat(2, 1fr);
}

.k-promises {
  grid-template-columns: 1fr;
  gap: 30px;
}

.k-promise {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 20px;
  align-items: center;
}

.k-promise .k-ph {
  margin-bottom: 0;
}

.k-facility__certs {
  grid-template-columns: repeat(3, 1fr);
}

.k-cert {
  border-radius: var(--k-radius);
  background: #fff;
}

.k-review {
  border-radius: var(--k-radius);
  background: #fff;
}

.k-reviews__list {
  grid-template-columns: 1fr;
}

.k-table {
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius);
  overflow: hidden;
  background: #fff;
}

.k-faq {
  border-top-color: var(--k-fg);
  border-top-width: 2px;
}

.k-storage__item {
  border-top-color: var(--k-accent);
}

.k-gifts {
  grid-template-columns: 1fr;
}

.k-gift {
  border-radius: var(--k-radius);
  background: #fff;
}

/* ------------------------------------------------------------------ 고정 구매바 */
.buybar {
  position: fixed;
  inset: auto 0 0 0;
  z-index: 110;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px calc(11px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--k-line);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(14px);
  box-shadow: 0 -6px 24px rgba(25, 21, 18, 0.09);
  transform: translateY(110%);
  transition: transform 0.35s var(--k-ease);
}

.buybar.is-show {
  transform: none;
}

.buybar__info {
  flex: 1;
  min-width: 0;
}

.buybar__opt {
  font-size: 11.5px;
  color: var(--k-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.buybar__sum {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.045em;
  color: var(--sale);
}

.buybar .btn {
  padding: 14px 24px;
  font-size: 15px;
}

/* 시안 네비게이션이 구매바와 겹치지 않게 */
.k-nav {
  bottom: 82px;
}

/* ------------------------------------------------------------------ 푸터 */
.footer {
  padding: 44px 20px 54px;
  background: var(--k-surface);
}

/* ------------------------------------------------------------------ 반응형 */
@media (min-width: 720px) {
  .pdp {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 34px;
    align-items: start;
    padding: 30px 24px 42px;
  }

  .buy {
    margin-top: 0;
  }

  .k-lineup {
    grid-template-columns: repeat(5, 1fr);
  }

  .k-process,
  .k-ings,
  .k-ship,
  .k-serving,
  .k-storage,
  .k-aging {
    grid-template-columns: repeat(4, 1fr);
  }

  .k-promises {
    grid-template-columns: repeat(3, 1fr);
  }

  .k-promise {
    grid-template-columns: 1fr;
  }

  .k-promise .k-ph {
    margin-bottom: 18px;
  }

  .k-reviews__list {
    grid-template-columns: repeat(2, 1fr);
  }

  .k-gifts {
    grid-template-columns: repeat(3, 1fr);
  }

  .sec {
    padding-inline: 28px;
  }
}

@media (max-width: 560px) {
  .trust-row {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .k-lineup {
    grid-template-columns: repeat(2, 1fr);
  }

  .k-facility__certs {
    grid-template-columns: 1fr;
  }

  .cta {
    grid-template-columns: 1fr 1.4fr;
  }
}