/* kashi38aro.com ポートフォリオ（プロトタイプ）
   構成は kyotaro.org/focus を参考にした「固定ヘッダー＋全幅ビジュアルの縦積み」。
   色・文言は仮。確定したら :root と各HTMLの [仮] を差し替える。 */

:root {
  --bg: #fff;
  --ink: #111;
  --muted: #8a8a8a;
  --link: #1a1ad6;
  --grad-a: #a6d900;
  --grad-b: #ff4454;
  --header-h: 92px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

/* ---- ヘッダー ---- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 10;
  height: var(--header-h);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 22px 28px 0;
  /* 下端へ向けて背景を透明にフェードさせる。フェード部分の下の作品はクリックできるよう、ヘッダー自体はクリックを通す */
  background: linear-gradient(to bottom, var(--bg) 0, var(--bg) 62%, rgba(255, 255, 255, 0) 100%);
  pointer-events: none;
}
.site-header a { pointer-events: auto; }

.brand {
  display: block;
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "MS PMincho", serif;
  font-size: 24px;
  line-height: 1;
  letter-spacing: .08em;
  text-transform: lowercase;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 16px;
}
.site-nav a {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--muted);
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] {
  color: var(--link);
  border-bottom-color: var(--link);
}

/* ---- focus：ビジュアルの複数列グリッド ---- */
main { padding-top: var(--header-h); }
.work-visual { line-height: 0; }

/* 作品は元の比率のまま表示する。列ごとに高さがずれてよいので、段組みで隙間なく詰める */
.work-grid { columns: 3; column-gap: 0; }
@media (max-width: 900px) { .work-grid { columns: 2; } }
@media (max-width: 640px) { .work-grid { columns: 1; } }

.work { position: relative; display: block; overflow: hidden; break-inside: avoid; }

.work-visual {
  position: relative;
  width: 100%;
  overflow: hidden;
  /* 暗い下地は端数ピクセルで細い黒線に見えるため、透明にする */
  background: transparent;
}
.work-visual img,
.work-visual video {
  width: calc(100% + 1px); /* 列の境目の端数ピクセルを1px重ねて埋める */
  max-width: none;
  height: auto;
  display: block;
}
/* 画像が未定の間の仮ビジュアル */
.work-visual.is-placeholder {
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(60% 80% at 20% 30%, var(--grad-a) 0%, transparent 70%),
    radial-gradient(60% 80% at 80% 70%, var(--grad-b) 0%, transparent 70%),
    #111;
}
.placeholder-tag {
  line-height: 1.5;
  position: absolute;
  right: 12px;
  bottom: 10px;
  padding: 2px 8px;
  font-size: 10px;
  letter-spacing: .12em;
  color: #fff;
  background: rgba(0, 0, 0, .55);
}

/* タイトルはホバー（またはキーボードフォーカス）したときだけ重ねて出す */
.work-title {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
  justify-content: center;
  padding: 16px;
  text-align: center;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: #fff;
  background: rgba(0, 0, 0, .5);
  opacity: 0;
  transition: opacity .2s ease;
}
.work-tags { font-size: 10px; font-weight: 400; letter-spacing: .14em; opacity: .85; }

.work:hover .work-title,
.work:focus-visible .work-title { opacity: 1; }
/* ホバーできない端末（スマホ）では常に隠すと題名が読めないため、下端に出す */
@media (hover: none) {
  .work-title {
    inset: auto 0 0 0;
    justify-content: flex-start;
    padding: 8px 10px;
    font-size: 11px;
    opacity: 1;
    background: linear-gradient(transparent, rgba(0, 0, 0, .6));
  }
}

/* ---- テキストページ（about / contact / works） ---- */
.page {
  max-width: 720px;
  padding: 48px 28px 96px;
  font-size: 14px;
  line-height: 2;
}
.page h1 {
  margin: 0 0 28px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--muted);
}
.page p { margin: 0 0 1.4em; }
.page a { border-bottom: 1px solid currentColor; }

.work-list { list-style: none; margin: 0; padding: 0; }
.work-list li { border-top: 1px solid #e5e5e5; }
.work-list li:last-child { border-bottom: 1px solid #e5e5e5; }
.work-list a {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 0;
  font-size: 13px;
}
.work-list .meta { color: var(--muted); font-size: 11px; letter-spacing: .08em; }

/* ---- スマホ ---- */
@media (max-width: 640px) {
  :root { --header-h: 96px; }
  .site-header { gap: 12px; padding: 16px 16px 0; }
  .brand { font-size: 20px; }
  .site-nav { gap: 8px 12px; }
  .page { padding: 32px 16px 72px; }
}

/* ---- 作品詳細 ---- */
.detail-video { display: block; width: 100%; max-height: calc(100vh - var(--header-h) - 96px); background: #000; }
.detail-meta { padding: 16px 28px 64px; }
.detail-title { margin: 0; font-size: 14px; font-weight: 700; letter-spacing: .06em; }
.detail-info { margin: 6px 0 0; font-size: 11px; letter-spacing: .12em; color: var(--muted); }
@media (max-width: 640px) { .detail-meta { padding: 12px 16px 48px; } }

/* ---- about：上にリール、下に「写真｜経歴」（kyotaro.org/about-kyotaro を参考） ---- */
.about { padding: 40px 28px 96px; }
.about-reel {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #111;
  position: relative;
}
.about-body {
  display: grid;
  grid-template-columns: minmax(200px, 1fr) 2fr;
  gap: 32px;
  margin-top: 40px;
  align-items: start;
}
.about-photo {
  position: relative;
  aspect-ratio: 2 / 5;
  background: #ddd;
}
.about-photo img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.about-text { font-size: 12px; line-height: 2; letter-spacing: .04em; }
.about-text p { margin: 0 0 1.6em; }
.about-name { margin: 0 0 1.2em; font-size: 13px; font-weight: 700; }
.about-awards { list-style: none; margin: 0 0 2em; padding: 0; }
.about-awards .year { display: inline-block; min-width: 4.5em; }
.about-office { color: var(--muted); font-size: 11px; }
@media (max-width: 640px) {
  .about { padding: 24px 16px 72px; }
  .about-body { grid-template-columns: 1fr; gap: 24px; }
  .about-photo { max-width: 320px; }
}

.detail-image { display: block; max-width: 100%; max-height: calc(100vh - var(--header-h) - 96px); margin: 0 auto; }

/* ホバー時のプレビュー動画：静止画の上に重ねる */
.work-visual video.work-preview {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity .2s ease;
}
.work-visual video.work-preview.is-playing { opacity: 1; }
/* 題名の暗い膜は動画の上に出す */
.work-title { z-index: 1; }

.detail-desc { margin: 14px 0 0; font-size: 12px; letter-spacing: .04em; }
.detail-desc a { border-bottom: 1px solid currentColor; }

/* JSで左→右・上→下の順に並べ直したあとの列（JSが無ければ上の段組みのまま） */
.work-grid.is-masonry { display: flex; columns: auto; }
.work-grid.is-masonry .work-col { flex: 1 1 0; min-width: 0; }

.about-name-en { margin-bottom: .2em; }
.about-handle { color: var(--muted); }
.about-links { list-style: none; margin: 0 0 1.6em; padding: 0; }
.about-links li { display: flex; align-items: center; gap: 10px; }
.about-links .label { display: inline-flex; width: 18px; color: var(--ink); }
.sns-icon { width: 18px; height: 18px; display: block; }
.about-links a { border-bottom: 1px solid currentColor; }

.about-career { list-style: none; margin: 0 0 2em; padding: 0; }
.about-career li { display: flex; gap: 16px; }
.about-career .year { flex: none; min-width: 6.5em; color: var(--muted); }

.about-office a { border-bottom: 1px solid currentColor; }

/* ホバーしなくても常に出す、タイル下端のラベル（創作ではない活動などの区別用） */
.work-label {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 18px 12px 8px;
  font-size: 10px;
  letter-spacing: .08em;
  color: #fff;
  background: linear-gradient(transparent, rgba(0, 0, 0, .55));
  pointer-events: none;
}
/* ホバーできない端末では題名が下端に出るため、ラベルは上端へ逃がす */
@media (hover: none) {
  .work-label {
    top: 0;
    bottom: auto;
    padding: 8px 12px 18px;
    background: linear-gradient(rgba(0, 0, 0, .55), transparent);
  }
}

/* ---- 右下の「先頭へ戻る」アイコン ---- */
.to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 20;
  width: 40px;
  height: 40px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  /* 円は置かず、矢印だけを出す。背景との差で色が反転するので、明るい場所では暗く、暗い場所では明るく見える */
  color: #fff;
  background: transparent;
  mix-blend-mode: difference;
  cursor: pointer;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity .25s ease, transform .25s ease, background .2s ease;
}
.to-top.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.to-top svg { width: 24px; height: 24px; }
.to-top:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; }
@media (max-width: 640px) { .to-top { right: 14px; bottom: 14px; } }
@media (prefers-reduced-motion: reduce) { .to-top { transition: none; } }