/* ============================================
   style.css — Sample Portfolio
   ============================================ */

/* ---------- リセット・変数 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg:     #0a0a0a;
  --color-footer: #e8e4dc;
  --color-white:  #f5f4f0;
  --font-en:      'Cormorant Garamond', serif;
  --font-ja:      'Noto Sans JP', sans-serif;
  --ease:         0.4s ease;
  --ease-slow:    0.6s cubic-bezier(0.76, 0, 0.24, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--color-bg);
  color: var(--color-white);
  font-family: var(--font-ja);
  font-weight: 300;
  line-height: 1.8;
  overflow-x: hidden;
}

/* JSで付与されるスクロールロック */
body.is-locked {
  overflow: hidden;
}

img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

ul {
  list-style: none;
}

/* ---------- 動的背景エリア ---------- */
.content-wrap {
  background: var(--color-bg);
  position: relative;
  z-index: 10;
  transition: background 0.6s ease, color 0.6s ease;
}

body.is-inverted .content-wrap {
  background: var(--color-footer);
  color: var(--color-bg);
}

/* ---------- 共通：アニメーション・テキスト ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(4vh);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

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

.roll-text {
  position: relative;
  display: inline-block;
  overflow: hidden;
  vertical-align: middle;
  visibility: hidden;
  padding-bottom: 0.2em; 
}

.roll-text::before,
.roll-text::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  visibility: visible;
  transition: transform var(--ease-slow);
  padding-bottom: 0.2em;
}

.roll-text::after {
  transform: translateY(100%);
}

a:hover .roll-text::before,
button:hover .roll-text::before {
  transform: translateY(-100%);
}

a:hover .roll-text::after,
button:hover .roll-text::after {
  transform: translateY(0);
}

.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  opacity: 0.7;
  border-bottom: 1px solid rgba(255,255,255,0.3);
  padding-bottom: 0.2rem;
  transition: opacity var(--ease), border-color var(--ease);
}

.arrow-link:hover {
  opacity: 1;
}

.arrow-link__icon {
  transition: transform var(--ease-slow);
}

.arrow-link:hover .arrow-link__icon {
  transform: translate(0.3rem, -0.3rem);
}

body.is-inverted .arrow-link {
  border-bottom-color: rgba(10,10,10,0.3);
}

/* ---------- HEADER ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 3vh 4vw;
  color: var(--color-white);
  transition: color 0.6s ease;
}

body.is-inverted .header {
  color: var(--color-bg);
}

.header__logo a {
  font-family: var(--font-en);
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  transition: opacity var(--ease);
}

.header__logo a:hover {
  opacity: 0.6;
}

.header__nav ul {
  display: flex;
  gap: 3vw;
}

.header__nav a {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.6;
  position: relative;
  padding-bottom: 0.2rem;
  transition: opacity var(--ease);
}

.header__nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width 0.35s ease;
}

.header__nav a:hover {
  opacity: 1;
}

.header__nav a:hover::after {
  width: 100%;
}

.nav__copy {
  display: none;
}

.header__menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 0.4rem;
  width: 2rem;
  height: 2rem;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 110;
}

.header__menu-btn span {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--color-white);
  transition: var(--ease);
}

body.is-inverted .header__menu-btn span {
  background: var(--color-bg);
}

.header__menu-btn.is-open span:nth-child(1) {
  transform: translateY(0.2rem) rotate(45deg);
}

.header__menu-btn.is-open span:nth-child(2) {
  transform: translateY(-0.25rem) rotate(-45deg);
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  width: 100vw;
  height: 100svh;
  color: var(--color-white);
}

.hero__video-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100svh;
  z-index: -1;
  overflow: hidden;
  background: #1a1a1a;
}

.hero__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  will-change: transform, filter;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.40);
  z-index: 1;
}

.hero__content {
  position: absolute;
  z-index: 2;
  bottom: 12vh;
  left: 4vw;
}

.hero__sub {
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  opacity: 0.55;
  margin-bottom: 1vh;
}

.hero__title {
  font-family: var(--font-en);
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 300;
  line-height: 1;
  letter-spacing: 0.04em;
  margin-bottom: 2vh;
}

.hero__catch {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  opacity: 0.65;
}

.hero__scroll {
  position: absolute;
  z-index: 2;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-bottom: 8vh;
  opacity: 0.65;
  transition: opacity var(--ease);
}

.hero__scroll:hover {
  opacity: 1;
}

.hero__scroll-text {
  font-size: 0.65rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  margin-bottom: 1vh;
}

.hero__scroll::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 1px;
  height: 7vh;
  background: var(--color-white);
  animation: scrollLine 1.8s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- WORKS ---------- */
.works {
  padding: 10vh 4vw;
}

.section-title {
  font-family: var(--font-en);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 300;
  letter-spacing: 0.06em;
  line-height: 1;
  margin-bottom: 5vh;
}

.works__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.2vw;
}

.works__item a {
  display: block;
  overflow: hidden;
}

.works__thumb {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #1a1a1a;
}

.works__thumb img {
  transition: transform 0.6s ease;
}

.works__item a:hover .works__thumb img {
  transform: scale(1.05);
}

.works__info {
  padding: 2vh 0 4vh;
  transition: opacity var(--ease);
}

.works__item a:hover .works__info {
  opacity: 0.6;
}

.works__cat {
  font-size: 0.65rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  opacity: 0.45;
  display: block;
  margin-bottom: 0.5vh;
}

.works__name {
  font-family: var(--font-en);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.05em;
}

/* ---------- ABOUT ---------- */
.about {
  padding-top: 15vh;
  overflow: hidden;
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1.2fr;
  align-items: center;
  gap: 5vw;
  padding: 0 4vw;
  margin-bottom: 12vh;
}

.about__left {
  grid-column: 1 / 3;
  grid-row: 1;
  z-index: 2;
  pointer-events: none;
}

.about__center {
  grid-column: 2 / 3;
  grid-row: 1;
  z-index: 1;
  /* PC時は幅を狭くし、高さをキープする縦長比率に設定 */
  width: 75%;
  margin: 0 auto;
  aspect-ratio: 9 / 16;
  background: #1a1a1a;
}

.about__center img {
  filter: grayscale(30%);
}

.about__right {
  grid-column: 3 / 4;
  grid-row: 1;
  z-index: 2;
  padding-left: 2vw;
}

.about__heading {
  font-family: var(--font-en);
  font-size: clamp(4rem, 8.5vw, 9rem);
  font-weight: 300;
  line-height: 0.95;
  letter-spacing: -0.01em;
  color: #fff;
  mix-blend-mode: difference;
}

.about__text-ja {
  font-size: 0.9rem;
  line-height: 2;
  margin-bottom: 3vh;
  letter-spacing: 0.05em;
}

/* スライダー (ロゴ対応最適化版) */
.about__scroller {
  width: 100%;
  overflow: hidden;
  padding-bottom: 10vh;
}

.about__scroller-inner {
  display: flex;
  width: max-content; /* 中身の数に合わせて幅を自動計算 */
  animation: scroll 30s linear infinite;
}

.about__scroller-item {
  width: 20vw; /* ロゴの幅 */
  padding: 0 2vw; /* ロゴ同士の余白 */
  display: flex;
  align-items: center;
  justify-content: center;
}

.about__scroller-item img {
  width: 100%;
  height: auto;
  object-fit: contain; /* ロゴの比率を保つ */
  filter: grayscale(100%);
  transition: filter var(--ease);
}

.about__scroller-item:hover img {
  filter: grayscale(0%);
}

@keyframes scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); } /* 半分(1セット分)まで進んでループ */
}

/* ---------- FOOTER ---------- */
.footer {
  background: transparent;
  min-height: 80svh;
  padding: 8vh 4vw 4vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.footer__top {
  display: flex;
  align-items: flex-start;
  margin-top: 5vh;
}

.footer__sns {
  display: flex;
  flex-direction: column;
  gap: 3vh;
}

.footer__sns-link {
  font-family: var(--font-en);
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 300;
  letter-spacing: 0.02em;
  line-height: 1;
  opacity: 0.6;
  display: flex;
  align-items: baseline;
  gap: 1vw;
  transition: opacity var(--ease), transform var(--ease-slow);
}

.footer__sns-link:hover {
  opacity: 1;
  transform: translateY(-0.5vh);
}

.footer__sns-arrow {
  font-size: 0.5em;
  opacity: 0.7;
  transition: transform var(--ease-slow);
}

.footer__sns-link:hover .footer__sns-arrow {
  transform: translate(0.5rem, -0.5rem);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.footer__logo-main {
  font-family: var(--font-en);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  margin-bottom: 0.5vh;
}

/* コピーライト向けにletter-spacingを調整 */
.footer__logo-sub {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  opacity: 0.6;
}

.footer__totop {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1vh;
  font-family: var(--font-ja);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: inherit;
  opacity: 0.6;
  transition: opacity var(--ease);
}

.footer__totop:hover {
  opacity: 1;
}

.footer__totop-arrow {
  font-size: 1.2rem;
  transition: transform var(--ease-slow);
}

.footer__totop:hover .footer__totop-arrow {
  transform: translateY(-0.5vh);
}

/* ---------- 画像拡大モーダル ---------- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  cursor: zoom-out;
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.modal.is-active {
  opacity: 1;
  pointer-events: auto;
}

.modal img {
  max-width: 90%;
  max-height: 80%;
  object-fit: contain;
  transform: scale(0.9);
  transition: transform 0.4s ease;
}

.modal.is-active img {
  transform: scale(1);
}

/* ---------- レスポンシブ ---------- */
@media (max-width: 900px) {
  .works__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about__inner {
    grid-template-columns: 1fr;
    gap: 5vh;
  }

  .about__left {
    grid-column: 1 / -1;
    grid-row: 1;
    margin-bottom: -15vh;
    z-index: 2;
    pointer-events: auto;
  }

  .about__center {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 85%;
    margin: 0 auto;
    /* スマホ・タブレット時は元の比率に戻す */
    aspect-ratio: 3 / 4;
  }

  .about__right {
    grid-column: 1 / -1;
    grid-row: 3;
    padding-left: 0;
  }

  .about__scroller-item {
    width: 40vw;
  }
}

@media (max-width: 600px) {
  .header {
    padding: 3vh 5vw;
  }

  .header__menu-btn {
    display: flex;
  }

  .header__nav {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
  }

  body.is-inverted .header__nav {
    background: var(--color-footer);
  }

  .header__nav.is-open {
    display: flex;
  }

  .header__nav ul {
    flex-direction: column;
    align-items: center;
    gap: 5vh;
  }

  .header__nav a {
    font-size: 1.1rem;
    letter-spacing: 0.2em;
  }

  .nav__copy {
    display: block;
    position: absolute;
    bottom: 5vh;
    font-size: 0.6rem;
    opacity: 0.4;
    letter-spacing: 0.1em;
  }

  .hero__content {
    left: 5vw;
    bottom: 15vh;
  }

  .works {
    padding: 10vh 5vw;
  }

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

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 5vh;
  }

  .footer__totop {
    align-self: flex-end;
  }

  .about__scroller-item {
    width: 50vw;
  }
}