/* =========================================
   Crystal 121 LP — style.css
   Mobile-first. White / Beige / Soft Green.
   ========================================= */

:root {
  --color-base: #ffffff;
  --color-surface: #f7f3ec;
  --color-surface-2: #eee7d8;
  --color-accent-1: #c8d5bb;
  --color-accent-1-soft: #e6ece0;
  --color-accent-2: #b8a47c;
  --color-text: #2a2a2a;
  --color-subtext: #6b6b6b;
  --color-line: #e5ddcf;
  --color-cta: #2a2a2a;

  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 20px;

  --shadow-soft: 0 6px 24px rgba(42, 42, 42, 0.06);
  --shadow-lift: 0 18px 40px rgba(42, 42, 42, 0.10);

  --font-serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  --font-display: "Cormorant Garamond", "Noto Serif JP", serif;

  --container-max: 1200px;
  --section-pad-y: 72px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

@media (min-width: 900px) {
  :root {
    --section-pad-y: 120px;
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  color: var(--color-text);
  background: var(--color-base);
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: opacity 0.25s var(--ease), color 0.25s var(--ease);
}

a:hover {
  opacity: 0.7;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.04em;
  margin: 0;
}

p {
  margin: 0;
}

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

dd {
  margin: 0;
}

button {
  font: inherit;
}

/* ---------- Layout Primitives ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

@media (min-width: 900px) {
  .container {
    padding: 0 48px;
  }
}

section {
  padding: var(--section-pad-y) 0;
}

.eyebrow {
  font-family: var(--font-display);
  font-size: 0.82rem;
  letter-spacing: 0.28em;
  color: var(--color-accent-2);
  text-transform: uppercase;
  margin-bottom: 20px;
  font-weight: 400;
}

.section-title {
  font-size: clamp(1.5rem, 4.6vw, 2.3rem);
  letter-spacing: 0.08em;
  margin-bottom: 40px;
  text-align: center;
}

.section-title--left {
  text-align: left;
}

.pc-only { display: none; }
@media (min-width: 768px) {
  .pc-only { display: inline; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 28px;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  border: 1px solid var(--color-cta);
  border-radius: 2px;
  transition: background 0.3s var(--ease), color 0.3s var(--ease), transform 0.25s var(--ease);
  cursor: pointer;
  background: transparent;
  color: var(--color-cta);
  text-align: center;
  min-width: 220px;
}

.btn:hover {
  opacity: 1;
  transform: translateY(-1px);
}

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

.btn--primary:hover {
  background: #000;
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--color-cta);
}

.btn--ghost:hover {
  background: var(--color-cta);
  color: #fff;
}

.btn--large {
  padding: 20px 36px;
  font-size: 1rem;
  min-width: 260px;
}

.btn__arrow {
  display: inline-block;
  transition: transform 0.3s var(--ease);
}

.btn:hover .btn__arrow {
  transform: translateY(3px);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-line);
}

.site-header__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header__logo {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--color-text);
}

.logo-mark {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.06em;
  color: var(--color-accent-2);
}

.logo-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-style: italic;
  letter-spacing: 0.04em;
}

.site-nav {
  display: none;
  gap: 28px;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
}

@media (min-width: 768px) {
  .site-nav {
    display: flex;
  }
  .site-header__inner {
    padding: 18px 48px;
  }
}

/* ---------- 1. HERO ---------- */
.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 80px 0;
  background: var(--color-surface);
}

.hero__image {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 65% center;
}

.hero__image-veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(255, 255, 255, 0.92) 0%,
    rgba(255, 255, 255, 0.8) 40%,
    rgba(255, 255, 255, 0.35) 75%,
    rgba(255, 255, 255, 0) 100%
  );
}

@media (max-width: 767px) {
  .hero__image-veil {
    background: linear-gradient(
      to bottom,
      rgba(255, 255, 255, 0.85) 0%,
      rgba(255, 255, 255, 0.7) 45%,
      rgba(255, 255, 255, 0.4) 70%,
      rgba(255, 255, 255, 0.15) 100%
    );
  }
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

@media (min-width: 900px) {
  .hero__content {
    padding: 0 48px;
  }
}

.hero__eyebrow {
  font-family: var(--font-display);
  font-size: 0.82rem;
  letter-spacing: 0.3em;
  color: var(--color-accent-2);
  margin-bottom: 28px;
}

.hero__eyebrow span {
  color: var(--color-text);
}

.hero__title {
  font-size: clamp(1.9rem, 6vw, 3.3rem);
  line-height: 1.45;
  letter-spacing: 0.08em;
  margin-bottom: 32px;
  max-width: 18em;
}

.hero__lead {
  font-size: 1rem;
  line-height: 2;
  color: var(--color-subtext);
  margin-bottom: 40px;
  max-width: 30em;
}

.hero__cta {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 40px;
  max-width: 320px;
}

@media (min-width: 640px) {
  .hero__cta {
    flex-direction: row;
    max-width: none;
    flex-wrap: wrap;
  }
}

.hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--color-subtext);
}

.hero__badges li {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.hero__badges li:not(:last-child)::after {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--color-accent-2);
  border-radius: 50%;
  margin-left: 10px;
}

/* ---------- 2. CONCERN ---------- */
.concern {
  background: var(--color-base);
}

.concern__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin: 56px 0 48px;
}

@media (min-width: 640px) {
  .concern__list {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 48px;
  }
}

@media (min-width: 1024px) {
  .concern__list {
    grid-template-columns: repeat(4, 1fr);
  }
}

.concern__list li {
  padding: 28px 20px;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  text-align: center;
}

.concern__num {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.18em;
  color: var(--color-accent-2);
  display: block;
  margin-bottom: 12px;
}

.concern__list h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
  letter-spacing: 0.05em;
}

.concern__list p {
  font-size: 0.88rem;
  color: var(--color-subtext);
  line-height: 1.75;
}

.concern__turn {
  text-align: center;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--color-text);
  letter-spacing: 0.08em;
  margin-top: 32px;
}

/* ---------- 3. CONCEPT ---------- */
.concept {
  background: var(--color-surface);
}

.concept__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

@media (min-width: 900px) {
  .concept__grid {
    grid-template-columns: 1.1fr 1fr;
    gap: 80px;
  }
}

.concept__image img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.concept__text p {
  color: var(--color-subtext);
  margin-bottom: 20px;
  line-height: 2;
}

.concept__text strong {
  color: var(--color-text);
  font-weight: 500;
}

/* ---------- 4. EGF ---------- */
.egf {
  background: var(--color-base);
}

.egf__lead {
  text-align: center;
  max-width: 44em;
  margin: 0 auto 56px;
  color: var(--color-subtext);
  font-size: 1rem;
  line-height: 2;
}

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

@media (min-width: 768px) {
  .egf__cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }
}

.egf-card {
  padding: 40px 28px;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  text-align: center;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.egf-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}

.egf-card__icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  color: var(--color-accent-2);
}

.egf-card__icon svg {
  width: 100%;
  height: 100%;
}

.egf-card h3 {
  font-size: 1.05rem;
  margin-bottom: 12px;
  letter-spacing: 0.06em;
}

.egf-card p {
  color: var(--color-subtext);
  font-size: 0.9rem;
  line-height: 1.85;
}

/* ---------- 5. HERO PRODUCT (Essence) ---------- */
.hero-product {
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-accent-1-soft) 100%);
}

.hero-product__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

@media (min-width: 900px) {
  .hero-product__grid {
    grid-template-columns: 1fr 1.1fr;
    gap: 80px;
  }
}

.hero-product__image {
  text-align: center;
}

.hero-product__image img {
  max-width: 420px;
  margin: 0 auto;
  filter: drop-shadow(0 20px 40px rgba(42, 42, 42, 0.12));
}

.product-name {
  font-family: var(--font-display);
  font-style: italic;
  letter-spacing: 0.04em;
  color: var(--color-accent-2);
  font-size: 0.7em;
  display: inline-block;
  margin-top: 8px;
}

.hero-product__lead {
  color: var(--color-subtext);
  line-height: 2;
  margin-bottom: 32px;
}

.spec {
  border-top: 1px solid var(--color-line);
  margin-bottom: 32px;
}

.spec > div {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.92rem;
}

.spec dt {
  color: var(--color-accent-2);
  letter-spacing: 0.1em;
  font-weight: 500;
}

.spec dd {
  color: var(--color-text);
  line-height: 1.75;
}

.hero-product__note {
  font-size: 0.78rem;
  color: var(--color-subtext);
  margin-top: 16px;
}

.price {
  font-family: var(--font-sans);
  font-size: 1.35rem;
  letter-spacing: 0.02em;
  color: var(--color-text);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* ---------- 6. LINE ---------- */
.line {
  background: var(--color-base);
}

.line__cards {
  display: grid;
  gap: 28px;
  grid-template-columns: 1fr;
  margin-top: 56px;
}

@media (min-width: 768px) {
  .line__cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}

.product-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 40px 28px;
  text-align: center;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}

.product-card__image {
  width: 100%;
  max-width: 280px;
  aspect-ratio: 1 / 1;
  margin: 0 auto 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-card__image img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 16px 30px rgba(42, 42, 42, 0.12));
}

.product-card__category {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  color: var(--color-accent-2);
  margin-bottom: 10px;
}

.product-card h3 {
  font-size: 1.25rem;
  margin-bottom: 16px;
  letter-spacing: 0.06em;
}

.product-card__copy {
  color: var(--color-subtext);
  font-size: 0.92rem;
  line-height: 1.85;
  margin-bottom: 24px;
}

.product-card__spec {
  text-align: left;
  border-top: 1px solid var(--color-line);
  margin-bottom: 24px;
}

.product-card__spec > div {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.85rem;
}

.product-card__spec dt {
  color: var(--color-accent-2);
  letter-spacing: 0.1em;
}

.product-card .btn {
  margin-top: auto;
}

/* ---------- 7. STEPS ---------- */
.steps {
  background: var(--color-surface);
}

.steps__list {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
  max-width: 900px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .steps__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }
}

.steps__list li {
  background: var(--color-base);
  padding: 32px 28px;
  border-radius: var(--radius-md);
  position: relative;
  border: 1px solid var(--color-line);
}

.steps__num {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.28em;
  color: var(--color-accent-2);
  display: block;
  margin-bottom: 14px;
}

.steps__list h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
  letter-spacing: 0.06em;
}

.steps__list p {
  color: var(--color-subtext);
  font-size: 0.9rem;
  line-height: 1.85;
}

/* ---------- 8. FEATURES ---------- */
.features {
  background: var(--color-base);
}

.features__grid {
  display: grid;
  gap: 28px;
  grid-template-columns: repeat(2, 1fr);
  max-width: 960px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .features__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
  }
}

.features__grid li {
  text-align: center;
  padding: 28px 16px;
}

.feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  color: var(--color-accent-2);
}

.feature-icon svg {
  width: 100%;
  height: 100%;
}

.features__grid h3 {
  font-size: 1rem;
  margin-bottom: 10px;
  letter-spacing: 0.08em;
}

.features__grid p {
  color: var(--color-subtext);
  font-size: 0.85rem;
  line-height: 1.8;
}

/* ---------- 9. BOTANICAL ---------- */
.botanical {
  background: var(--color-accent-1-soft);
}

.botanical__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

@media (min-width: 900px) {
  .botanical__grid {
    grid-template-columns: 1fr 1.1fr;
    gap: 80px;
  }
}

.botanical__image img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.botanical__list > div {
  padding: 24px 0;
  border-bottom: 1px solid rgba(184, 164, 124, 0.25);
}

.botanical__list > div:first-child {
  border-top: 1px solid rgba(184, 164, 124, 0.25);
}

.botanical__list dt {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  color: var(--color-text);
}

.botanical__list dd {
  color: var(--color-subtext);
  font-size: 0.9rem;
  line-height: 1.85;
}

/* ---------- 10. FAQ ---------- */
.faq {
  background: var(--color-base);
}

.faq__list {
  max-width: 780px;
  margin: 0 auto;
}

.faq__item {
  border-bottom: 1px solid var(--color-line);
}

.faq__item summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  font-family: var(--font-serif);
  font-size: 1rem;
  letter-spacing: 0.05em;
  transition: color 0.2s var(--ease);
}

.faq__item summary::-webkit-details-marker {
  display: none;
}

.faq__item summary:hover {
  color: var(--color-accent-2);
}

.faq__mark {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--color-accent-2);
  transition: transform 0.3s var(--ease);
  flex-shrink: 0;
}

.faq__item[open] .faq__mark {
  transform: rotate(45deg);
}

.faq__body {
  padding: 0 8px 24px;
  color: var(--color-subtext);
  font-size: 0.92rem;
  line-height: 1.95;
}

/* ---------- 11. FINAL CTA ---------- */
.final-cta {
  background: var(--color-surface);
  text-align: center;
}

.final-cta__lead {
  color: var(--color-subtext);
  margin-bottom: 48px;
}

.final-cta__cards {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
  max-width: 1000px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .final-cta__cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.final-card {
  background: var(--color-base);
  padding: 32px 24px;
  border-radius: var(--radius-md);
  text-align: center;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  color: var(--color-text);
}

.final-card:hover {
  opacity: 1;
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}

.final-card img {
  width: 100%;
  max-width: 180px;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  margin-bottom: 20px;
  filter: drop-shadow(0 12px 20px rgba(42, 42, 42, 0.1));
}

.final-card__tag {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--color-cta);
  color: #fff;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  padding: 4px 10px;
  border-radius: 2px;
}

.final-card h3 {
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.final-card p {
  color: var(--color-subtext);
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.final-card__price {
  font-family: var(--font-sans);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
  margin-bottom: 20px;
  font-variant-numeric: tabular-nums;
}

.final-card__btn {
  margin-top: auto;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  padding: 10px 24px;
  border: 1px solid var(--color-cta);
  color: var(--color-cta);
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}

.final-card:hover .final-card__btn {
  background: var(--color-cta);
  color: #fff;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-text);
  color: #d8d3c7;
  padding: 56px 0 32px;
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: 32px;
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .site-footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.site-footer__brand .logo-mark {
  color: var(--color-accent-2);
}

.site-footer__brand .logo-name {
  color: #fff;
}

.site-footer__brand p {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  margin-top: 8px;
  color: #b8b2a4;
}

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
}

.site-footer__nav a {
  color: #d8d3c7;
}

.site-footer__copyright {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: #8d8879;
}

/* ---------- Fade-in on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  html {
    scroll-behavior: auto;
  }
}