/* styles.css */
/* Codex Handoff:
   - デザイントークンは:root定義を更新することで全体反映。
  - アニメーションは[data-animate]属性で制御。新要素にも同属性を付与することで既存ロジックを継承。
   - プレースホルダー画像は images/ ディレクトリ内の実素材で置換済み。差し替え時はファイル名を保つ。 */
:root {
  --color-bg: #F6F6F4;
  --color-text: #151515;
  --color-surface: #FFFFFF;
  --color-accent: #A9A39A;
  --color-border: #D9D6D1;
  --color-focus: #3344FF;

  --font-ja-heading: 'Shippori Mincho B1', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  --font-ja-body: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --font-latin: 'Ibarra Real Nova', 'Times New Roman', serif;
  --font-fallback: serif;

  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 40px;
  --space-8: 48px;
  --space-9: 64px;
  --space-10: 80px;

  --radius-none: 0;
  --radius-sm: 4px;
  --radius-lg: 12px;

  --shadow-soft: 0 12px 32px rgba(21, 21, 21, 0.08);
  --shadow-elevated: 0 20px 44px rgba(21, 21, 21, 0.12);
}

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

body {
  margin: 0;
  font-family: var(--font-ja-body), var(--font-fallback);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

main {
  position: relative;
  z-index: 1;
}

.ink-trace {
  position: fixed;
  inset: -20vh 0 -20vh 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.16;
  transform: translate3d(0, 0, 0) rotate(-3deg);
  will-change: transform;
}

.ink-trace::before,
.ink-trace::after {
  content: "";
  position: absolute;
  inset: -60vh -40vw -40vh -30vw;
  background-size: 280px 280px, 320px 320px;
  mix-blend-mode: multiply;
}

.ink-trace::before {
  background-image:
    linear-gradient(105deg, rgba(21, 21, 21, 0.12) 0%, rgba(21, 21, 21, 0) 65%),
    url("images/fukurou_back.png");
  filter: blur(24px);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  mix-blend-mode: multiply;
}

.ink-trace::after {
  inset: -80vh -30vw -60vh -20vw;
  background-image:
    linear-gradient(120deg, rgba(21, 21, 21, 0.08) 0%, rgba(21, 21, 21, 0) 70%),
    repeating-linear-gradient(135deg, rgba(21, 21, 21, 0.05) 0 6px, rgba(21, 21, 21, 0) 6px 28px);
  filter: blur(18px);
}

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

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

a:hover,
a:focus-visible {
  text-decoration: underline;
}

button {
  font-family: inherit;
  cursor: pointer;
  background: none;
  border: none;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  position: static;
  width: auto;
  height: auto;
  padding: var(--space-2) var(--space-4);
  background: var(--color-text);
  color: var(--color-surface);
  z-index: 1000;
}

.container {
  width: min(calc(100% - 48px), 1120px);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
}

.site-header__logo-text {
  font-family: var(--font-ja-heading);
  font-size: 24px;
  letter-spacing: 0.1em;
}

.site-header__menu-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-text);
  color: var(--color-text);
  background-color: transparent;
}

.site-header__nav {
  display: none;
}

.site-header__nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin: 0;
  padding: var(--space-5) 0;
  list-style: none;
}

.site-header__nav-link {
  font-weight: 500;
}

body.has-js .site-header__nav.is-open {
  display: block;
}

body:not(.has-js) .site-header__nav {
  display: block;
}

.hero {
  position: relative;
  padding-block: clamp(120px, 22vh, 180px) clamp(100px, 20vh, 180px);
  min-height: 88vh;
  display: flex;
  align-items: flex-start;
  overflow: hidden;
}

.hero__background {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero__background img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.9) brightness(0.9);
}

.hero__background::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.18) 0%, rgba(255, 255, 255, 0.06) 45%, rgba(246, 246, 244, 0.8) 100%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
  gap: clamp(var(--space-6), 6vw, var(--space-10));
  text-align: center;
  padding-top: clamp(340px, 42vw, 480px);
  padding-bottom: clamp(80px, 14vh, 160px);
}

.hero__overlay {
  position: absolute;
  top: clamp(24px, 5vw, 120px);
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 1;
}

.hero__overlay-logo {
  width: clamp(240px, 26vw, 380px);
  max-height: 52vh;
  object-fit: contain;
  opacity: 1;
  filter: drop-shadow(0 18px 32px rgba(21, 21, 21, 0.2));
}

.hero__content {
  position: relative;
  max-width: clamp(520px, 46vw, 680px);
  padding-inline: clamp(12px, 2.4vw, 24px);
  display: grid;
  gap: clamp(var(--space-3), 3vw, var(--space-5));
  color: #111;
  z-index: 2;
  text-shadow: 0 14px 42px rgba(255, 255, 255, 0.55);
}

.hero__eyebrow {
  font-family: var(--font-latin);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  font-size: 13px;
  margin-bottom: var(--space-3);
}

.hero__title {
  font-family: var(--font-ja-heading);
  font-size: clamp(28px, 6.5vw, 44px);
  line-height: 1.28;
  letter-spacing: 0.04em;
  margin: 0;
  text-shadow: 0 22px 54px rgba(255, 255, 255, 0.68);
}

.hero__lead {
  font-family: var(--font-ja-body);
  font-size: clamp(16px, 2vw, 22px);
  margin: 0;
  color: rgba(21, 21, 21, 0.78);
  text-shadow: 0 14px 48px rgba(255, 255, 255, 0.58);
}

.hero__description {
  max-width: 42em;
  margin: 0;
  font-family: var(--font-ja-body);
  color: rgba(21, 21, 21, 0.72);
  text-shadow: 0 10px 30px rgba(255, 255, 255, 0.4);
}

.hero__cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-6);
  right: var(--space-6);
  writing-mode: vertical-rl;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  font-size: 12px;
  color: rgba(21, 21, 21, 0.55);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.hero__scroll::after {
  content: "";
  display: inline-block;
  width: 1px;
  height: 56px;
  background: rgba(21, 21, 21, 0.3);
  margin-top: var(--space-2);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  font-weight: 600;
  transition: opacity 0.2s ease;
  text-decoration: none;
}

.button--primary {
  background-color: var(--color-text);
  color: var(--color-surface);
}

.button--primary:hover,
.button--primary:focus-visible {
  opacity: 0.9;
}

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

.section {
  padding-block: var(--space-10);
}

.section__inner {
  display: grid;
  gap: var(--space-8);
}

.section__header {
  margin-bottom: var(--space-6);
  max-width: 640px;
}

.section__title {
  font-family: var(--font-ja-heading);
  font-size: 28px;
  margin: 0 0 var(--space-3);
}

.section__subtitle {
  margin: 0;
  color: var(--color-accent);
}

.concept__quote {
  margin-top: var(--space-6);
  padding-left: var(--space-5);
  border-left: 2px solid var(--color-text);
  font-family: var(--font-ja-heading);
  font-size: 20px;
  letter-spacing: 0.05em;
}

.concept__body {
  display: grid;
  gap: var(--space-7);
}

.concept__visual {
  margin: 0;
}

.concept__visual img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.concept__text {
  display: grid;
  gap: var(--space-5);
  max-width: 640px;
}


.lineup__grid {
  display: grid;
  gap: var(--space-7);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.lineup-card {
  background-color: var(--color-surface);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: var(--space-4);
  position: relative;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.lineup-card::before {
  content: "";
  position: absolute;
  top: var(--space-6);
  left: var(--space-6);
  width: 56px;
  height: 2px;
  background: linear-gradient(90deg, rgba(21, 21, 21, 0.4), rgba(169, 163, 154, 0));
  pointer-events: none;
}

.lineup-card:hover,
.lineup-card:focus-within {
  transform: translateY(-6px);
  box-shadow: var(--shadow-elevated);
}

.lineup-card__title {
  font-family: var(--font-ja-heading);
  font-size: 24px;
  margin: 0;
}

.lineup-card__list {
  margin: 0;
  padding-left: var(--space-6);
}

.gallery__canvas {
  display: grid;
  gap: var(--space-6);
  justify-items: center;
  padding-bottom: var(--space-6);
}

.gallery__piece {
  margin: 0;
  display: grid;
  gap: var(--space-2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 48px rgba(21, 21, 21, 0.18);
  background: var(--color-surface);
  padding: clamp(var(--space-3), 3vw, var(--space-4));
  width: min(520px, 100%);
}

.gallery__piece img {
  width: 100%;
  border-radius: calc(var(--radius-lg) - 4px);
}

.gallery__piece figcaption {
  font-size: 14px;
  color: rgba(21, 21, 21, 0.6);
  letter-spacing: 0.05em;
  text-align: center;
}

@media (min-width: 768px) {
  .gallery__canvas {
    grid-template-columns: repeat(12, 1fr);
    grid-auto-rows: minmax(140px, auto);
    gap: var(--space-7);
    justify-items: stretch;
    align-content: start;
  }

  .gallery__piece {
    width: 100%;
    padding: var(--space-4);
    position: relative;
  }

  .gallery__piece--a {
    grid-column: 1 / span 3;
    grid-row: 1;
  }

  .gallery__piece--b {
    grid-column: 10 / span 3;
    grid-row: 1;
  }

  .gallery__piece--c {
    grid-column: 4 / span 6;
    grid-row: 1 / span 2;
    box-shadow: 0 28px 60px rgba(21, 21, 21, 0.2);
  }

  .gallery__piece--d {
    grid-column: 2 / span 4;
    grid-row: 3;
  }

  .gallery__piece--e {
    grid-column: 8 / span 4;
    grid-row: 3;
  }

  .gallery__piece--f {
    grid-column: 5 / span 4;
    grid-row: 4;
  }
}

.features__grid {
  display: grid;
  gap: var(--space-5);
}

.features-card {
  background-color: transparent;
  border: 1px solid var(--color-border);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.features-card__title {
  font-family: var(--font-ja-heading);
  font-size: 22px;
  margin: 0 0 var(--space-3);
}

.features-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0));
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.features-card:hover::before,
.features-card:focus-within::before {
  opacity: 1;
}

.flow__layout {
  display: grid;
  gap: var(--space-7);
}

.flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-5);
  position: relative;
}

.flow__steps::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 18px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, rgba(21, 21, 21, 0.2), rgba(169, 163, 154, 0.1));
}

.flow__step {
  display: flex;
  gap: var(--space-4);
  padding-left: var(--space-5);
}

.flow__step-number {
  display: inline-flex;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--color-text);
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-family: var(--font-latin);
  background-color: var(--color-surface);
  flex-shrink: 0;
}

.flow__actions {
  background-color: var(--color-surface);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: var(--space-4);
}

.flow__note {
  margin: 0;
  font-size: 14px;
  color: var(--color-accent);
}

.testimonials__grid {
  display: grid;
  gap: var(--space-5);
}

.testimonial-card {
  background-color: var(--color-surface);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.testimonial-card__quote {
  margin: 0 0 var(--space-3);
  font-family: var(--font-ja-heading);
  line-height: 1.7;
}

.testimonial-card__meta {
  margin: 0;
  font-size: 14px;
  color: var(--color-accent);
}

.faq__list {
  border-top: 1px solid var(--color-border);
}

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

.faq__question {
  margin: 0;
}

.faq__question-button {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
  padding: var(--space-4) 0;
  font-family: var(--font-ja-heading);
  font-size: 18px;
  text-align: left;
}

.faq__answer {
  padding-bottom: var(--space-4);
  color: var(--color-text);
}

.faq__answer[hidden] {
  display: none;
}

.site-footer {
  background: linear-gradient(180deg, #151515 0%, #1f1f1d 100%);
  color: var(--color-surface);
  padding-block: var(--space-9);
}

.site-footer__cta {
  text-align: center;
  margin-bottom: var(--space-8);
}

.site-footer__title {
  font-family: var(--font-ja-heading);
  font-size: 28px;
  margin: 0 0 var(--space-4);
}

.site-footer__links {
  display: grid;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

.site-footer__heading {
  margin: 0 0 var(--space-3);
  font-size: 18px;
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.site-footer__list a {
  color: var(--color-surface);
}

.site-footer__text {
  margin: 0 0 var(--space-2);
  font-size: 14px;
}

.site-footer__cta-button {
  background-color: var(--color-surface);
  color: var(--color-text);
}

.site-footer__cta-button:hover,
.site-footer__cta-button:focus-visible {
  opacity: 0.9;
}

[data-animate] {
  will-change: transform, opacity;
}

body.has-js [data-animate] {
  opacity: 0;
  transform: var(--animate-transform, translate3d(0, 32px, 0));
  transition: opacity var(--animate-duration, 0.9s) ease, transform var(--animate-duration, 0.9s) ease, filter 1.1s ease;
  filter: var(--animate-filter, none);
}

body.has-js [data-animate].is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  filter: none;
}

body.has-js [data-animate].is-visible:hover,
body.has-js [data-animate].is-visible:focus-within {
  animation-play-state: paused;
}

[data-animate="fade"] {
  --animate-transform: translate3d(0, 24px, 0);
  --animate-duration: 1.1s;
  --animate-filter: blur(6px);
}

[data-animate="lift"] {
  --animate-transform: translate3d(0, 48px, 0);
  --animate-duration: 0.9s;
}

body.has-js .lineup__grid > [data-animate]:nth-child(2),
body.has-js .features__grid > [data-animate]:nth-child(2),
body.has-js .testimonials__grid > [data-animate]:nth-child(2) {
  transition-delay: 0.12s;
}

body.has-js .lineup__grid > [data-animate]:nth-child(3),
body.has-js .features__grid > [data-animate]:nth-child(3),
body.has-js .testimonials__grid > [data-animate]:nth-child(3) {
  transition-delay: 0.24s;
}

@keyframes rippleFlow {
  0% {
    transform: scale(1) translate3d(-1%, -1%, 0);
    filter: hue-rotate(0deg);
  }
  40% {
    transform: scale(1.015) translate3d(1%, 0.5%, 0);
    filter: hue-rotate(-2deg);
  }
  80% {
    transform: scale(1.02) translate3d(-0.5%, 1%, 0);
    filter: hue-rotate(3deg);
  }
  100% {
    transform: scale(1.01) translate3d(0.5%, -0.5%, 0);
    filter: hue-rotate(0deg);
  }
}

@media (min-width: 768px) {
  .site-header__menu-button {
    display: none;
  }

  .site-header__nav {
    display: block !important;
  }

  .site-header__nav-list {
    flex-direction: row;
    gap: var(--space-6);
    padding: 0;
  }

  .hero__inner {
    justify-content: flex-end;
  }

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

  .concept__body {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: center;
  }

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

  .gallery__canvas {
    min-height: 840px;
  }

  .flow__layout {
    grid-template-columns: 2fr 1fr;
    align-items: start;
  }

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

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

@media (min-width: 1024px) {
  .hero__title {
    font-size: 52px;
  }

  .section__title {
    font-size: 32px;
  }

  .lineup-card {
    padding: var(--space-7);
  }

}

@media (max-width: 767px) {
  .hero {
    padding-block: var(--space-9);
    min-height: 75vh;
  }

  .hero__inner {
    justify-content: flex-start;
    padding-top: clamp(240px, 74vw, 320px);
    gap: var(--space-5);
  }

  .hero__content {
    padding: 0 var(--space-3);
  }

  .hero__title {
    font-size: clamp(24px, 9vw, 30px);
  }

  .hero__lead {
    font-size: clamp(15px, 4.8vw, 18px);
  }

  .hero__description {
    font-size: clamp(14px, 4.5vw, 18px);
  }

  .hero__overlay-logo {
    width: clamp(220px, 58vw, 320px);
    max-height: 48vh;
    opacity: 1;
  }

  .hero__scroll {
    display: none;
  }

  .section__inner {
    gap: var(--space-6);
  }

}

@media (prefers-reduced-motion: reduce) {
  body.has-js [data-animate] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  body.has-js [data-animate].is-visible {
    animation: none !important;
  }

  .hero__scroll::after {
    animation: none;
  }
}