/* ==========================================================================
   noa LP - style.css
   基準幅: 1440px（PC版のみ / 大まかなレイアウト実装段階）
   ========================================================================== */

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

html {
  font-size: 62.5%; /* 1rem = 10px */
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

h1, h2, h3, p {
  margin: 0;
}

/* ---------- Variables ---------- */
:root {
  /* colors */
  --color-bg: #ffffff;
  --color-cream: #f1eee7;
  --color-ivory: #f6f4f0;
  --color-gray-bg: #f2f2f0;
  --color-text: #1a1a1a;
  --color-text-sub: #6b6b66;
  --color-border: #1a1a1a;
  --color-dark-overlay: rgba(0, 0, 0, 0.45);

  /* fonts */
  --font-serif: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", serif;
  --font-sans: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif;

  /* layout */
  --content-max: 1600px;
  --pad-x: clamp(32px, 6.94vw, 100px);
  --header-height: 70px;
  --hero-height: 633px;
  --hero-left-width: 624px;
}

/* アンカーリンクでスクロールした際、固定ヘッダーに隠れないための余白 */
section[id] {
  scroll-margin-top: var(--header-height);
}

/* ---------- Layout helpers ---------- */
.section-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

.section-label {
  font-size: 1.3rem;
  letter-spacing: 0.15em;
  font-weight: 700;
  color: var(--color-text);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 3.2rem;
  line-height: 1.5;
  font-weight: 600;
  margin-top: 20px;
}

.section-lead {
  margin-top: 24px;
  font-size: 1.5rem;
  line-height: 1.9;
  color: var(--color-text);
}

/* ---------- Button ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 32px;
  margin-top: 32px;
  padding: 18px 28px;
  font-size: 1.4rem;
  letter-spacing: 0.05em;
  white-space: nowrap;
  transition: opacity 0.2s ease;
}

.btn:hover {
  opacity: 0.7;
}

.btn--outline {
  border: 1px solid var(--color-border);
  color: var(--color-text);
  background: transparent;
}

.btn--solid {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: #fff;
  backdrop-filter: blur(2px);
}

.btn__arrow {
  font-size: 1rem;
}

/* ---------- Site Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 100;
  background: transparent;
  box-shadow: none;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.is-scrolled {
  background: var(--color-cream);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

.site-header.is-scrolled .site-header__right {
  color: var(--color-text);
}

.site-header.is-scrolled .header-divider {
  background: rgba(0, 0, 0, 0.2);
}

.site-header.is-scrolled .header-cart {
  border-color: var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 var(--pad-x);
}

.site-header__left {
  display: flex;
  align-items: center;
  gap: 60px;
}

.logo a {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  letter-spacing: 0.25em;
  color: var(--color-text);
}

.global-nav ul {
  display: flex;
  gap: 40px;
}

.global-nav a {
  font-size: 1.3rem;
  letter-spacing: 0.08em;
  color: var(--color-text);
}

.site-header__right {
  display: flex;
  align-items: center;
  gap: 20px;
  color: #fff;
  transition: color 0.3s ease;
}

.header-link {
  font-size: 1.2rem;
  letter-spacing: 0.05em;
}

.header-divider {
  width: 1px;
  height: 14px;
  background: rgba(255, 255, 255, 0.5);
  transition: background-color 0.3s ease;
}

.header-cart {
  font-size: 1.2rem;
  letter-spacing: 0.05em;
  border: 1px solid rgba(255, 255, 255, 0.7);
  padding: 8px 18px;
  transition: border-color 0.3s ease;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  display: flex;
  height: var(--hero-height);
}

.hero__text {
  flex: 0 0 var(--hero-left-width);
  background-color: var(--color-cream);
  background-image: url("../images/アセット 41-80.jpg");
  background-size: cover;
  background-position: center;
  padding: 96px var(--pad-x) 27px;
  display: flex;
  flex-direction: column;
}

.hero__mark {
  display: block;
  width: 40px;
  height: 1px;
  background: var(--color-text);
  margin-bottom: 48px;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: 4.2rem;
  line-height: 1.5;
  font-weight: 400;
  letter-spacing: 0.03em;
}

.hero__title-highlight {
  position: relative;
  z-index: 0;
}

.hero__title-highlight::before {
  content: "";
  position: absolute;
  z-index: -1;
  left: 0;
  right: 0;
  top: 0.51em;
  height: 0.6em;
  background-color: #f8f7f4;
  transform: scaleX(0);
  transform-origin: left;
  animation: heroHighlightIn 0.5s ease forwards;
  animation-delay: var(--line-delay, 0s);
}

.hero__title .char {
  display: inline-block;
  opacity: 0;
  transform: translateY(12px);
  animation: heroCharIn 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes heroCharIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroHighlightIn {
  to {
    transform: scaleX(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero__title .char {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .hero__title-highlight::before {
    animation: none;
    transform: scaleX(1);
  }
}

.hero__lead {
  margin-top: 28px;
  font-size: 2.2rem;
  line-height: 1.85;
}

.hero__cta {
  width: 296px;
  height: 54px;
  flex-shrink: 0;
  margin-top: 16px;
  padding: 0 32px;
  justify-content: space-between;
  gap: 0;
  font-size: 1.5rem;
}

.hero__brand {
  margin-top: 32px;
}

.hero__brand-name {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  letter-spacing: 0.15em;
}

.hero__brand-sub {
  margin-top: 6px;
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  color: var(--color-text-sub);
}

.hero__visual {
  position: relative;
  flex: 1 1 auto;
  overflow: hidden;
}

.hero__visual picture {
  display: block;
  width: 100%;
  height: 100%;
}

.hero__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

.hero__visual-copy {
  position: absolute;
  top: 190px;
  right: 95px;
  color: #fff;
  font-family: var(--font-serif);
  font-size: 2rem;
  line-height: 1.6;
  text-align: left;
}

.hero__visual-tag {
  position: absolute;
  top: 343px;
  right: 148px;
  color: #fff;
  font-size: 1.1rem;
  letter-spacing: 0.15em;
  line-height: 2;
  text-align: left;
}

/* ---------- Features ---------- */
.features {
  background: var(--color-bg);
}

.features__list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 56px var(--pad-x);
}

.features__item {
  padding: 0 30px;
  border-left: 1px solid #ddd;
}

.features__item:first-child {
  border-left: none;
  padding-left: 0;
}

.features__num {
  display: block;
  font-size: 1.3rem;
  color: var(--color-text-sub);
  margin-bottom: 14px;
}

.features__title {
  font-family: var(--font-serif);
  font-size: 1.9rem;
  font-weight: 600;
}

.features__desc {
  margin-top: 10px;
  font-size: 1.3rem;
  color: var(--color-text-sub);
}

/* ---------- Concept ---------- */
.concept {
  display: flex;
  align-items: stretch;
  background: var(--color-ivory);
}

.concept__image {
  position: relative;
  flex: 0 0 49.3%;
  overflow: hidden;
}

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

.concept__tag {
  position: absolute;
  left: 40px;
  bottom: 40px;
  color: #fff;
  font-size: 1.1rem;
  letter-spacing: 0.15em;
  line-height: 1.8;
}

.concept__body {
  flex: 1 1 auto;
  padding: 80px 60px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.concept__sub {
  position: relative;
  flex: 0 0 17%;
  margin: 80px var(--pad-x) 80px 0;
  align-self: center;
}

.concept__sub img {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.concept__sub-caption {
  margin-top: 16px;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
  line-height: 1.7;
  color: var(--color-text);
}

/* ---------- Ingredients ---------- */
.ingredients {
  background: var(--color-bg);
  padding: 100px 0;
}

.ingredients__inner {
  display: flex;
  gap: 60px;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

.ingredients__body {
  flex: 0 0 340px;
}

.ingredients__content {
  flex: 1 1 auto;
}

.ingredients__list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.ingredients__item img {
  width: 100%;
  aspect-ratio: 228 / 173;
  object-fit: cover;
}

.ingredients__item h3 {
  margin-top: 20px;
  font-family: var(--font-serif);
  font-size: 1.7rem;
  font-weight: 600;
}

.ingredients__item p {
  margin-top: 6px;
  font-size: 1.3rem;
  color: var(--color-text-sub);
}

.ingredients__links {
  display: flex;
  gap: 40px;
  margin-top: 32px;
}

.ingredients__links a {
  font-size: 1.3rem;
}

/* ---------- Moisture Banner ---------- */
.moisture {
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.moisture__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -1;
}

.moisture__text {
  padding: 60px var(--pad-x);
  max-width: 700px;
  color: var(--color-text);
}

.moisture__text .section-lead {
  color: var(--color-text);
}

.moisture__tag {
  position: absolute;
  right: 60px;
  top: 50%;
  transform: translateY(-50%);
  color: #fff;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  letter-spacing: 0.15em;
  line-height: 1.9;
  text-align: right;
}

/* ---------- Voice ---------- */
.voice {
  position: relative;
  background: var(--color-gray-bg);
  padding: 80px var(--pad-x) 44px;
}

.voice__intro {
  max-width: 500px;
}

.voice__list {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 50px;
}

.voice__item {
  background: var(--color-ivory);
  padding: 30px;
  min-height: 130px;
}

.voice__comment {
  font-size: 1.4rem;
  line-height: 1.8;
}

.voice__person {
  margin-top: 20px;
  font-size: 1.2rem;
  color: var(--color-text-sub);
}

.voice__more {
  position: absolute;
  right: 0;
  bottom: 24px;
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  font-size: 1.2rem;
  letter-spacing: 0.05em;
}

/* ---------- CTA ---------- */
.cta {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.cta__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--color-dark-overlay);
  z-index: -1;
}

.cta__content {
  text-align: center;
  color: #fff;
}

.cta__title {
  font-family: var(--font-serif);
  font-size: 2.6rem;
  font-weight: 600;
}

.cta__lead {
  margin-top: 16px;
  font-size: 1.5rem;
}

.cta .btn--solid {
  justify-content: center;
  gap: 20px;
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 24px var(--pad-x);
  text-align: center;
  background: var(--color-text);
  color: #fff;
}

.site-footer__copy {
  font-size: 1.1rem;
  letter-spacing: 0.1em;
}

/* ---------- Mobile Nav (hamburger) ---------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--color-text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-open .nav-toggle__bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-open .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-open .nav-toggle__bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.mobile-nav {
  background: var(--color-cream);
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  padding: 0 24px;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.25s ease, padding 0.35s ease;
}

.mobile-nav.is-open {
  max-height: 480px;
  opacity: 1;
  padding: 20px 24px 28px;
}

.mobile-nav ul {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.mobile-nav a {
  font-size: 1.5rem;
  letter-spacing: 0.05em;
  color: var(--color-text);
}

.mobile-nav__actions {
  display: flex;
  gap: 24px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.mobile-nav__actions a {
  font-size: 1.3rem;
  letter-spacing: 0.05em;
  color: var(--color-text);
}

/* ---------- Scroll Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-group > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-group.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

.reveal-group.is-visible > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-group.is-visible > *:nth-child(3) { transition-delay: 0.2s; }
.reveal-group.is-visible > *:nth-child(4) { transition-delay: 0.3s; }

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal-group > * {
    transition: none;
    opacity: 1;
    transform: none;
  }

  .mobile-nav {
    transition: none;
  }

  .nav-toggle__bar {
    transition: none;
  }
}

/* ==========================================================================
   Mobile Layout (max-width: 768px)
   ========================================================================== */
@media (max-width: 768px) {
  /* ---- Common ---- */
  .btn {
    gap: 20px;
    padding: 14px 20px;
    font-size: 1.3rem;
  }

  .section-title {
    font-size: 2.4rem;
  }

  .section-lead {
    font-size: 1.4rem;
    margin-top: 18px;
  }

  /* ---- Header ---- */
  .site-header {
    position: static;
    height: auto;
    background: var(--color-cream);
  }

  .site-header__inner {
    padding: 16px 20px;
  }

  .logo a {
    font-size: 1.8rem;
  }

  .global-nav,
  .site-header__right {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .mobile-nav[hidden] {
    display: none;
  }

  /* ---- Hero ---- */
  /* 画像を先頭に、メインコピーはボトル右側に縦書きで重ねる構成 */
  .hero {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-areas:
      "visual"
      "lead"
      "cta"
      "brand";
    height: auto;
    background-color: var(--color-cream);
    background-image: url("../images/アセット 41-80.jpg");
    background-size: cover;
    background-position: center;
  }

  .hero__text {
    display: contents;
  }

  .hero__mark {
    display: none;
  }

  .hero__title {
    grid-area: visual;
    align-self: start;
    justify-self: end;
    z-index: 1;
    margin: 15% 15% 0 0;
    writing-mode: vertical-rl;
    text-orientation: upright;
    display: flex;
    flex-direction: column;
    gap: 0;
    color: #fff;
    font-size: 1.55rem;
    line-height: 0.8;
    letter-spacing: 0.05em;
  }

  .hero__title-highlight::before {
    display: none;
  }

  .hero__lead {
    grid-area: lead;
    margin: 0;
    padding: 28px 24px 0;
    font-size: 1.5rem;
    text-align: center;
  }

  .hero__cta {
    grid-area: cta;
    width: auto;
    max-width: none;
    margin: 24px 24px 0;
    justify-self: center;
  }

  .hero__brand {
    grid-area: brand;
    margin: 24px 24px 32px;
    text-align: center;
  }

  .hero__visual {
    grid-area: visual;
    z-index: 0;
    width: 100%;
    aspect-ratio: 6 / 5;
    height: auto;
  }

  .hero__visual-copy {
    display: none;
  }

  .hero__visual-tag {
    top: auto;
    right: auto;
    bottom: 20px;
    left: 20px;
    font-size: 1rem;
    line-height: 1.8;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.7);
  }

  /* ---- Features ---- */
  .features__list {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 20px;
    padding: 40px 24px;
  }

  .features__item {
    border-left: none;
    border-top: 1px solid #ddd;
    padding: 20px 0 0;
  }

  .features__item:nth-child(1),
  .features__item:nth-child(2) {
    border-top: none;
    padding-top: 0;
  }

  /* ---- Concept ---- */
  .concept {
    flex-direction: column;
  }

  .concept__image {
    flex: none;
    width: 100%;
    height: 340px;
  }

  .concept__body {
    padding: 36px 24px;
  }

  .concept__sub {
    flex: none;
    align-self: flex-start;
    width: 140px;
    margin: 32px 0 40px 24px;
  }

  /* ---- Ingredients ---- */
  .ingredients {
    padding: 56px 0;
  }

  .ingredients__inner {
    flex-direction: column;
    gap: 32px;
    padding: 0 24px;
  }

  .ingredients__body {
    flex: none;
  }

  .ingredients__list {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .ingredients__links {
    flex-direction: column;
    gap: 12px;
  }

  /* ---- Moisture Banner ---- */
  .moisture {
    display: block;
    min-height: auto;
  }

  .moisture__bg {
    position: static;
    width: 100%;
    height: 300px;
  }

  .moisture__text {
    max-width: 100%;
    padding: 40px 24px 48px;
    background: var(--color-cream);
  }

  .moisture__tag {
    top: 205px;
    bottom: auto;
    right: 20px;
    transform: none;
    color: #fff;
    font-size: 0.95rem;
  }

  /* ---- Voice ---- */
  .voice {
    padding: 56px 24px 40px;
  }

  .voice__list {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 32px;
  }

  .voice__more {
    display: flex;
    position: static;
    width: fit-content;
    margin-top: 24px;
    margin-left: auto;
  }

  /* ---- CTA ---- */
  .cta {
    min-height: 320px;
    padding: 0 24px;
  }

  .cta__title {
    font-size: 2rem;
  }

  .cta__lead {
    font-size: 1.3rem;
  }

  .cta .btn--solid {
    width: 100%;
    max-width: 296px;
  }

  /* ---- Footer ---- */
  .site-footer {
    padding: 20px 24px;
  }
}