/* =====================================================================
   ひより写真室 — index.css （ホームのページ固有レイアウト）
   共有トークン（tokens.css）の :root 変数のみを使用。新規の色・書体は
   一切足さない。12カラムを非対称に運用し、生成りの紙面に採光の余白。
   ===================================================================== */

/* 本文コンテンツは木漏れ日レイヤー(z:1)の上へ */
.site-header,
.site-main,
.site-footer { position: relative; z-index: 2; }

/* ---------- preloader inner ---------- */
.preloader-inner { display: grid; justify-items: center; gap: var(--space-1); }

/* ---------- header ---------- */
.site-header {
  position: fixed; inset-block-start: 0; inset-inline: 0; z-index: 60;
  padding-block: var(--space-2);
  transition: background-color var(--dur-2) var(--ease-out-quart);
}
.site-header.scrolled {
  background: color-mix(in oklab, var(--color-bg) 84%, transparent);
  -webkit-backdrop-filter: blur(7px);
          backdrop-filter: blur(7px);
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-3);
}
.site-brand {
  font-family: var(--font-hand); font-weight: 600;
  font-size: var(--step-1); letter-spacing: 0.05em;
}
.site-nav { display: flex; gap: clamp(1rem, 2.4vw, 2.4rem); align-items: baseline; }
.site-nav a { font-size: var(--step--1); letter-spacing: 0.1em; }
.site-nav a.is-current { color: var(--color-accent); }
.nav-toggle { display: none; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; align-items: center;
  padding-block: calc(var(--space-7) + var(--space-3)) var(--space-6);
}
.hero__inner { position: relative; width: 100%; }
.hero__latin {
  position: absolute; top: -0.34em; right: 0;
  font-size: clamp(2.6rem, 10vw, 9rem);
  line-height: 0.9;
  color: color-mix(in oklab, var(--color-accent) 34%, transparent);
  pointer-events: none; user-select: none;
  z-index: 0;
}
.hero__eyebrow { position: relative; margin-bottom: var(--space-4); }
.hero__title {
  position: relative;
  font-family: var(--font-body);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: 0.012em;
  font-feature-settings: "palt" 1;
  font-size: clamp(2.7rem, 8.6vw, 7.6rem);
}
.hero__line { display: block; }
.hero__body {
  position: relative;
  margin-top: var(--space-4);
  max-width: 34ch;
  font-size: var(--step-1);
  line-height: 1.9;
  grid-column: auto;
}
.hero__sign {
  position: absolute; right: 0; bottom: 0;
  font-size: var(--step-1); color: var(--color-muted);
}
.hero__scroll {
  position: absolute; left: var(--page-inline); bottom: var(--space-4);
  display: flex; flex-direction: column; align-items: center; gap: var(--space-2);
}
.hero__scroll-line {
  position: relative; width: 1px; height: clamp(44px, 8vh, 84px);
  background: var(--color-hairline-strong); overflow: hidden;
}
.hero__scroll-line::after {
  content: ""; position: absolute; inset: 0;
  background: var(--color-accent);
  animation: cue 2.6s var(--ease-in-out-quart) infinite;
}
.hero__scroll-label { writing-mode: vertical-rl; letter-spacing: 0.24em; }
@keyframes cue {
  0% { transform: translateY(-100%); }
  60%, 100% { transform: translateY(100%); }
}

/* ---------- manifesto ---------- */
.manifesto { position: relative; }
.manifesto__side {
  grid-column: 1 / 2;
  display: flex; justify-content: flex-start;
}
.manifesto__side .vertical {
  font-family: var(--font-hand);
  font-size: var(--step-1);
  color: color-mix(in oklab, var(--color-accent) 68%, var(--color-muted));
}
.manifesto__body { grid-column: 7 / 13; }
.manifesto__body h2 {
  font-family: var(--font-body); font-weight: 700;
  font-feature-settings: "palt" 1;
  margin-block: var(--space-2) var(--space-4);
}
.manifesto__body p { font-size: var(--step-1); line-height: 1.95; max-width: 40ch; }

/* ---------- gallery ---------- */
.gallery__intro { max-width: 62ch; }
.gallery__intro h2 {
  font-family: var(--font-body); font-weight: 700;
  font-feature-settings: "palt" 1;
  margin-block: var(--space-2) var(--space-3);
}
.panels {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
  margin-top: var(--space-5);
  align-items: start;
}
.panel { position: relative; }
.panel--haru  { grid-column: 1 / 7; }
.panel--natsu { grid-column: 7 / 13; margin-top: clamp(2rem, 11vh, 9rem); }
.panel--aki   { grid-column: 2 / 8;  margin-top: clamp(-3.5rem, -4vh, -1rem); }
.panel--fuyu  { grid-column: 8 / 13; margin-top: clamp(1rem, 6vh, 5rem); }
.panel__inner { position: relative; aspect-ratio: 4 / 5; width: 100%; }
.panel__art { position: absolute; inset: 0; width: 100%; height: 100%; color: var(--color-fg); }
.panel__cap {
  position: absolute; left: var(--space-3); right: var(--space-3); bottom: var(--space-3);
  display: flex; align-items: flex-end; justify-content: space-between; gap: var(--space-2);
}
.panel__season { font-size: var(--step-1); color: var(--color-fg); }
.panel__meta { font-size: var(--step--1); }

/* 季節ごとの色面（パレット内 color-mix のみ） */
.panel--haru  .season-panel { background: linear-gradient(165deg, color-mix(in oklab, var(--wakaba) 42%, var(--kinari)), var(--kinari) 78%); }
.panel--natsu .season-panel { background: linear-gradient(165deg, color-mix(in oklab, var(--awaai) 56%, var(--kinari)), var(--kinari) 80%); }
.panel--aki   .season-panel { background: linear-gradient(165deg, color-mix(in oklab, var(--wakaba) 34%, var(--kinari)), var(--kinari) 82%); }
.panel--fuyu  .season-panel { background: linear-gradient(165deg, color-mix(in oklab, var(--awaai) 64%, var(--kinari)), var(--kinari) 82%); }

/* ---------- process ---------- */
.process { position: relative; }
.process__band {
  background: color-mix(in oklab, var(--color-surface) 38%, var(--color-bg));
  padding-block: var(--space-6);
}
.process__nums {
  grid-column: 1 / 4;
  display: flex; flex-direction: column; gap: var(--space-3);
}
.process__num { display: flex; align-items: baseline; gap: var(--space-2); }
.process__num .index-num { font-size: var(--step-2); }
.process__num-note { color: var(--color-muted); font-size: var(--step--1); }
.process__body { grid-column: 5 / 12; }
.process__body h2 {
  font-family: var(--font-body); font-weight: 700;
  font-feature-settings: "palt" 1;
  margin-block: var(--space-2) var(--space-3);
}
.process__body p { font-size: var(--step-1); line-height: 1.95; max-width: 44ch; }

/* ---------- list ---------- */
.list__head { max-width: 62ch; }
.list__head h2 {
  font-family: var(--font-body); font-weight: 700;
  font-feature-settings: "palt" 1;
  margin-block: var(--space-2) var(--space-3);
}
.place-list { margin-top: var(--space-5); border-top: 1px solid var(--color-hairline); }
.place-row {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-3);
  align-items: baseline;
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--color-hairline);
}
.place-row__num { font-size: var(--step-1); }
.place-row__name {
  font-weight: 500; font-size: var(--step-1);
  color: color-mix(in oklab, var(--color-fg) 86%, var(--color-muted));
  transition: color var(--dur-1) var(--ease-out-quart);
}
.place-row__note { color: var(--color-muted); font-size: var(--step--1); }
.place-row::after {
  content: ""; position: absolute; left: 0; bottom: -1px; height: 1px; width: 100%;
  background: var(--color-accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-2) var(--ease-out-quart);
}
.place-row:hover::after { transform: scaleX(1); }
.place-row:hover .place-row__name { color: var(--color-fg); }

/* ---------- footer ---------- */
.site-footer { padding-block: var(--space-6) var(--space-5); }
.footer__rule { margin-bottom: var(--space-5); }
.footer__cta { text-align: center; }
.footer__title {
  font-family: var(--font-display); font-weight: 300; font-style: normal;
  line-height: 1.0; letter-spacing: 0.005em;
  font-size: clamp(2.6rem, 12vw, 11rem);
  margin-block: var(--space-2) var(--space-3);
}
.footer__body { max-width: 44ch; margin-inline: auto; }
.footer__contact {
  display: flex; gap: var(--space-4); justify-content: center; flex-wrap: wrap;
  margin-top: var(--space-4); max-width: none;
  font-family: var(--font-display); font-size: var(--step-1); letter-spacing: 0.02em;
}
.footer__marquee {
  margin-block: var(--space-6);
  font-family: var(--font-display); font-style: italic; font-weight: 400;
  font-size: var(--step-3); color: var(--color-muted);
}
.footer__marquee .marquee-track > span::after { content: "·"; margin-left: clamp(1.2rem, 3vw, 3rem); color: color-mix(in oklab, var(--color-muted) 60%, transparent); }
.footer__bottom {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: var(--space-3); flex-wrap: wrap;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-hairline);
  font-size: var(--step--1); color: var(--color-muted);
}
.footer__nav { display: flex; gap: var(--space-4); }
.footer__nav a { letter-spacing: 0.08em; }
.footer__copy { max-width: none; }

/* =====================================================================
   レスポンシブ：設計された各段
   ===================================================================== */
@media (max-width: 1024px) {
  .hero__body { max-width: 40ch; }
  .manifesto__body { grid-column: 6 / 13; }
}

@media (max-width: 720px) {
  /* モバイル nav：全画面メニュー */
  .nav-toggle {
    display: inline-flex; flex-direction: column; justify-content: center; align-items: center;
    gap: 6px; width: 44px; height: 44px; position: relative; z-index: 70;
  }
  .nav-toggle span {
    display: block; width: 24px; height: 1.5px; background: var(--color-fg);
    transition: transform var(--dur-1) var(--ease-out-quart), opacity var(--dur-1) var(--ease-out-quart);
  }
  .site-nav {
    position: fixed; inset: 0; z-index: 65;
    flex-direction: column; align-items: center; justify-content: center;
    gap: var(--space-4);
    background: color-mix(in oklab, var(--color-bg) 96%, transparent);
    transform: translateY(-100%);
    transition: transform var(--dur-2) var(--ease-in-out-quart);
  }
  .site-nav a { font-size: var(--step-2); font-family: var(--font-display); letter-spacing: 0.04em; }
  body.nav-open .site-nav { transform: translateY(0); }
  body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
  body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
  body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

  /* ゴースト英字はブランドの手書きサインと重ならないよう、
     上寄りに移し、透明度を落とし、字を小さくする。 */
  .hero__latin { top: auto; bottom: 42%; right: 0; font-size: clamp(2.2rem, 13vw, 3.6rem); opacity: 0.5; }
  .hero__sign { position: static; display: block; margin-top: var(--space-4); }
  .hero__scroll { left: 0; }
  .hero__scroll-label { writing-mode: horizontal-tb; letter-spacing: 0.2em; }

  .manifesto__side { grid-column: 1 / -1; margin-bottom: var(--space-3); }
  .manifesto__side .vertical { writing-mode: horizontal-tb; }
  .manifesto__body { grid-column: 1 / -1; }

  .panels { grid-template-columns: 1fr; gap: var(--space-4); }
  .panel--haru, .panel--natsu, .panel--aki, .panel--fuyu {
    grid-column: 1 / -1; margin-top: 0;
  }
  .panel__inner { aspect-ratio: 3 / 4; }

  .process__nums { grid-column: 1 / -1; flex-direction: row; flex-wrap: wrap; gap: var(--space-3) var(--space-4); margin-bottom: var(--space-4); }
  .process__body { grid-column: 1 / -1; }

  .footer__contact { flex-direction: column; gap: var(--space-2); }
  .footer__bottom { flex-direction: column; }
}

@media (max-width: 480px) {
  .place-row { grid-template-columns: auto 1fr; row-gap: var(--space-1); }
  .place-row__note { grid-column: 2 / 3; }
  .hero__latin { bottom: 44%; font-size: clamp(2rem, 14vw, 3.2rem); }
}

/* reduced-motion：スクロール誘導の点滅も止める */
@media (prefers-reduced-motion: reduce) {
  .hero__scroll-line::after { animation: none !important; transform: translateY(0) !important; opacity: 0.4; }
}