/* ===== RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --black: #111111;
  --white: #f7f7f5;
  --gray:  #888888;
  --header-h: 56px;
  --font: "Helvetica Neue", Helvetica, Arial, "Hiragino Sans", "Yu Gothic", sans-serif;
}

html {
  font-size: 16px;
}

body {
  background: var(--white);
  color: var(--black);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}

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

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


/* ===== HEADER ===== */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 250;
  height: var(--header-h);
  background: var(--white);
  border-bottom: 1px solid var(--black);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  height: 100%;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

/* INFO・CONTACTページのKOHHI — アニメーション終端と完全一致 */
.logo-kohhi {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1;
}

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

.pc-nav a {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: opacity 0.2s;
}

.pc-nav a:hover { opacity: 0.4; }

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 16px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--black);
  transition: transform 0.3s, opacity 0.3s;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }


/* ===== MOBILE NAV ===== */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0;
  z-index: 251;
  background: var(--white);
  border-bottom: 1px solid var(--black);
  flex-direction: column;
  padding: 16px 20px;
  transform: translateY(-100%);
  opacity: 0;
  transition: transform 0.35s ease, opacity 0.35s ease;
}

.mobile-nav.open {
  transform: translateY(0);
  opacity: 1;
}

.mobile-nav .nav-link {
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 14px 0;
  border-bottom: 1px solid #e0e0e0;
}

.mobile-nav .nav-link:last-child { border-bottom: none; }


/* ===== HERO ===== */
.hero {
  margin-top: var(--header-h);
  height: calc(100vh - var(--header-h));
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 0 64px;
  position: relative;
  border-bottom: 1px solid var(--black);
}

.hero-name {
  font-size: clamp(40px, 7.5vw, 110px);
  font-weight: 700;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
  letter-spacing: 0; /* 各スパンで管理 */
}

.hl {
  display: inline-block;
  overflow: hidden;
  white-space: nowrap;
  letter-spacing: 0.05em;
  vertical-align: top;
}

.hl.fade {
  will-change: opacity, width;
}

.hero-sub {
  margin-top: 32px;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray);
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  right: 64px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray);
  transition: opacity 0.2s;
}

.hero-scroll:hover { opacity: 0.4; }


/* ===== SECTION LABEL ===== */
.section-label {
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gray);
  padding: 20px 64px;
  border-bottom: 1px solid #e0e0e0;
}


/* ===== WORKS — 縦1列 ===== */
.works {
  border-bottom: 1px solid var(--black);
}

.works-list {
  /* 縦積み */
}

.work-item {
  border-bottom: 1px solid var(--black);
  cursor: pointer;
  overflow: hidden;
}

.work-item:last-child {
  border-bottom: none;
}

.work-img-wrap {
  width: 100%;
  overflow: hidden;
  line-height: 0;
}

.work-img-wrap img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.7s ease;
}

.work-item:hover .work-img-wrap img {
  transform: scale(1.03);
}

.work-meta {
  padding: 18px 64px;
  display: flex;
  align-items: baseline;
  gap: 16px;
  border-top: 1px solid #e0e0e0;
}

.work-num {
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--gray);
  flex-shrink: 0;
}

.work-title {
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  flex: 1;
}

.work-year {
  font-size: 11px;
  color: var(--gray);
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.work-arrow {
  font-size: 11px;
  color: var(--gray);
  letter-spacing: 0.05em;
  flex-shrink: 0;
  transition: transform 0.2s;
}

.work-item:hover .work-arrow {
  transform: translateX(4px);
}


/* ===== INFO ===== */
.info {
  border-bottom: 1px solid var(--black);
}

.info-inner {
  display: grid;
  grid-template-columns: 280px 1fr;
  padding: 80px 64px;
  gap: 64px;
}

.info-ja {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

.info-en {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray);
}

.info-body p {
  font-size: 14px;
  line-height: 2;
  letter-spacing: 0.04em;
  margin-bottom: 32px;
}

.info-career {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-bottom: 8px;
}

.info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.info-list li {
  font-size: 12px;
  letter-spacing: 0.08em;
  display: flex;
  gap: 12px;
  align-items: baseline;
}

.info-list li span { color: var(--gray); }

.info-list-en li {
  color: var(--gray);
  overflow-wrap: break-word;
  word-break: break-word;
}

.pc-only { display: inline; }

.info-portrait {
  width: 100%;
  height: auto;
  margin-bottom: 20px;
  object-fit: cover;
}

.info-bilingual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.info-col-en,
.info-col-ja {
  min-width: 0; /* グリッド内での折り返し保証 */
}

.info-en-body {
  font-size: 13px;
  line-height: 2;
  letter-spacing: 0.02em;
  color: var(--gray);
  margin-bottom: 32px;
  overflow-wrap: break-word;
  word-break: break-word;
}

.info-address {
  font-size: 12px;
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--gray);
  margin-top: 8px;
  border-top: 1px solid #e0e0e0;
  padding-top: 24px;
}


/* ===== CONTACT ===== */
.contact {
  border-bottom: 1px solid var(--black);
}

.contact-inner {
  padding: 80px 64px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-text {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gray);
}

.contact-mail {
  font-size: 18px;
  letter-spacing: 0.08em;
  transition: opacity 0.2s;
  display: inline-block;
}

.contact-mail:hover { opacity: 0.4; }

.contact-insta {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transition: opacity 0.2s;
  display: inline-block;
}

.contact-insta:hover { opacity: 0.4; }


/* ===== FOOTER ===== */
footer {
  padding: 24px 64px;
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--gray);
  text-transform: uppercase;
}


/* =========================================
   OVERLAY（作品詳細）
   ========================================= */
.overlay {
  position: fixed;
  top: var(--header-h); left: 0; right: 0; bottom: 0;
  z-index: 200;
  background: var(--white);
  overflow-y: auto;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-100%);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.overlay.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}

.overlay-header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--header-h);
  background: var(--white);
  border-bottom: 1px solid var(--black);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0 16px;
}

.overlay-title {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: calc(100% - 56px);
}

.overlay-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  padding: 8px;
  line-height: 1;
  color: var(--black);
  letter-spacing: 0;
  transition: opacity 0.2s;
}

.overlay-close:hover { opacity: 0.4; }

.overlay-body {
  /* サブ写真を縦1列 */
}

/* 説明文エリア */
.overlay-desc {
  width: calc(100% - 820px);
  padding: 24px 16px;
  border-bottom: 1px solid var(--black);
}

.overlay-desc-heading {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 24px;
}

.overlay-desc-ja {
  font-size: 12px;
  line-height: 2;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}

.overlay-desc-en {
  font-size: 11px;
  line-height: 1.9;
  letter-spacing: 0.02em;
  color: var(--gray);
  margin-bottom: 0;
}

.overlay-desc-en + .overlay-desc-en {
  margin-top: 12px;
}

/* 写真エリア */
.overlay-photo {
  width: calc(100% - 820px);
  line-height: 0;
  border-bottom: 1px solid var(--black);
}

.overlay-photo img {
  width: 100%;
  height: auto;
  display: block;
}

@media (max-width: 767px) {
  .overlay-photo,
  .overlay-desc {
    width: 100%;
  }
  .overlay-desc {
    padding: 32px 20px;
  }
  .overlay-desc-heading { font-size: 12px; margin-bottom: 32px; }
  .overlay-desc-ja  { font-size: 13px; margin-bottom: 32px; }
  .overlay-desc-en  { font-size: 12px; }
}


/* =========================================
   RESPONSIVE — TABLET
   ========================================= */
@media (max-width: 1024px) {
  .hero { padding: 0 40px; }
  .hero-scroll { right: 40px; }
  .section-label { padding: 20px 40px; }
  .work-meta { padding: 16px 40px; }
  .info-inner { grid-template-columns: 200px 1fr; gap: 40px; padding: 60px 40px; }
  .contact-inner { padding: 60px 40px; }
  footer { padding: 20px 40px; }
}


/* =========================================
   RESPONSIVE — MOBILE
   ========================================= */
@media (max-width: 767px) {
  :root { --header-h: 50px; }

  .header-inner { padding: 0 20px; }
  .pc-nav { display: none; }
  .hamburger { display: flex; }
  .mobile-nav { display: flex; }

  .hero { padding: 0 20px; height: calc(100svh - var(--header-h)); }
  .hero-scroll { right: 20px; bottom: 24px; }

  .section-label { padding: 16px 20px; }

  .work-meta { padding: 14px 20px; }
  .work-title { font-size: 12px; }

  .info-inner { grid-template-columns: 1fr; gap: 32px; padding: 48px 20px; }
  .info-bilingual { grid-template-columns: 1fr; gap: 0; }
  .info-career { grid-template-columns: 1fr; gap: 0; }
  .pc-only { display: none; }

  .contact-inner { padding: 48px 20px; }
  .contact-mail { font-size: 15px; }

  footer { padding: 20px; }

  .overlay-header { padding: 0 20px; }
}