/* ===== テーマ（色） ===== */
:root {
  color-scheme: light;
  --bg: #cfe6f5; --surface: rgba(255,255,255,.9);
  --text: #1d2530; --muted: #566170; --line: rgba(29,37,48,.14);
  --accent: #2a6a8c; --accent-ink: #ffffff; --tint: rgba(42,106,140,.11);
  --bar: rgba(255,255,255,.74); --dim: 0;
  --shadow: 0 1px 2px rgba(16,24,40,.08), 0 10px 28px rgba(16,24,40,.12);
  --radius: 16px;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b1016; --surface: rgba(18,25,34,.86);
  --text: #e7ebf0; --muted: #a3adba; --line: rgba(231,235,240,.16);
  --accent: #7fc3e0; --accent-ink: #06202c; --tint: rgba(127,195,224,.14);
  --bar: rgba(10,15,21,.74); --dim: .52;
  --shadow: 0 1px 2px rgba(0,0,0,.45), 0 12px 32px rgba(0,0,0,.4);
}
/* JavaScriptが動かない環境でも、OSの設定に合わせてダークにする */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --bg: #0b1016; --surface: rgba(18,25,34,.86);
    --text: #e7ebf0; --muted: #a3adba; --line: rgba(231,235,240,.16);
    --accent: #7fc3e0; --accent-ink: #06202c; --tint: rgba(127,195,224,.14);
    --bar: rgba(10,15,21,.74); --dim: .52;
    --shadow: 0 1px 2px rgba(0,0,0,.45), 0 12px 32px rgba(0,0,0,.4);
  }
}

/* ===== 基本 ===== */
*, *::before, *::after { box-sizing: border-box; }
html { background: var(--bg); scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: transparent; color: var(--text);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", Meiryo, system-ui, sans-serif;
  line-height: 1.85; font-size: 1rem; letter-spacing: .02em; -webkit-font-smoothing: antialiased;
}
h1, h2, h3, p, ul, dl, dd { margin: 0; }
ul { padding: 0; list-style: none; }
a { color: inherit; }
svg { width: 1.25em; height: 1.25em; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.wrap { width: min(100% - 2.5rem, 880px); margin-inline: auto; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: var(--accent-ink); padding: .5rem 1rem; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }

/* ===== 四季の背景（スクロールで 春→夏→秋→冬） ===== */
.scene { position: fixed; inset: 0; z-index: -2; overflow: hidden; background: var(--bg); pointer-events: none; }
.scene::after { content: ""; position: absolute; inset: 0; background: #060a12; opacity: var(--dim); transition: opacity .4s; }
.season { position: absolute; inset: 0; will-change: opacity; }
.s0 { opacity: var(--o0, 1); } .s1 { opacity: var(--o1, 0); } .s2 { opacity: var(--o2, 0); } .s3 { opacity: var(--o3, 0); }
.layer { position: absolute; left: 0; right: 0; top: -70px; bottom: -70px; background-repeat: no-repeat; background-size: cover; background-position: center bottom; }
.sky  { transform: translate3d(0, calc((var(--p, 0) - .5) * -24px), 0); }
.land { transform: translate3d(0, calc((var(--p, 0) - .5) * -60px), 0); }
.s0 .sky { background-image: url(scenes/sky-spring.svg); }  .s0 .land { background-image: url(scenes/land-spring.svg); }
.s1 .sky { background-image: url(scenes/sky-summer.svg); }  .s1 .land { background-image: url(scenes/land-summer.svg); }
.s2 .sky { background-image: url(scenes/sky-autumn.svg); }  .s2 .land { background-image: url(scenes/land-autumn.svg); }
.s3 .sky { background-image: url(scenes/sky-winter.svg); }  .s3 .land { background-image: url(scenes/land-winter.svg); }

/* 朝霧（あさぎり）。秋〜冬に濃く、夏はうっすら */
.mist { position: absolute; left: 0; right: 0; bottom: 8%; height: 40%; overflow: hidden; opacity: var(--mist, .3);
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 35%, #000 65%, transparent);
          mask-image: linear-gradient(to bottom, transparent, #000 35%, #000 65%, transparent); }
.mist i { position: absolute; top: 0; bottom: 0; left: 0; width: 200%;
  background: radial-gradient(ellipse 22% 38% at 25% 55%, rgba(255,255,255,.78), transparent 70%),
              radial-gradient(ellipse 18% 30% at 75% 40%, rgba(255,255,255,.62), transparent 70%);
  background-size: 50% 100%; background-repeat: repeat-x; animation: drift 90s linear infinite; }
.mist i.b { top: 14%; opacity: .7; animation-duration: 150s; animation-direction: reverse; }
@keyframes drift { to { transform: translate3d(-50%, 0, 0); } }
.fx { position: fixed; inset: 0; width: 100%; height: 100%; z-index: -1; pointer-events: none; }

/* 今の季節の表示 */
.season-chip {
  position: fixed; z-index: 40; right: max(14px, env(safe-area-inset-right)); bottom: calc(14px + env(safe-area-inset-bottom));
  display: flex; align-items: center; gap: .6rem; padding: .35rem 1rem .35rem .4rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: 999px; box-shadow: var(--shadow);
  font-size: .78rem; pointer-events: none;
}
.season-chip .kanji { width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; background: var(--accent); color: var(--accent-ink); font-weight: 700; font-size: 1.05rem; }
.season-chip .cap { display: flex; flex-direction: column; line-height: 1.35; gap: 3px; }
.seasons { display: flex; gap: 5px; }
.seasons i { width: 14px; height: 4px; border-radius: 2px; background: var(--line); transition: background .3s; }
.seasons i.on { background: var(--accent); }

/* ===== 上部バー ===== */
.bar {
  position: sticky; top: 0; z-index: 50; display: flex; align-items: center; gap: 1rem;
  padding: .6rem max(1rem, env(safe-area-inset-right)) .6rem max(1rem, env(safe-area-inset-left));
  padding-top: calc(.6rem + env(safe-area-inset-top));
  background: var(--bar); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line);
}
.brand { text-decoration: none; font-weight: 700; letter-spacing: .12em; color: var(--accent); }
.bar nav { margin-left: auto; display: flex; gap: clamp(.6rem, 2.5vw, 1.4rem); font-size: .88rem; }
.bar nav a { text-decoration: none; color: var(--muted); padding: .25rem 0; border-bottom: 2px solid transparent; }
.bar nav a:hover { color: var(--text); border-color: var(--accent); }
.icon-btn { width: 40px; height: 40px; display: grid; place-items: center; cursor: pointer; background: transparent; color: var(--text); border: 1px solid var(--line); border-radius: 50%; }
.icon-btn:hover { background: var(--tint); }
.i-moon { display: none; }
:root[data-theme="light"] .i-sun { display: none; }
:root[data-theme="light"] .i-moon { display: block; }

/* ===== ヒーロー ===== */
.hero { min-height: min(86vh, 760px); min-height: min(86svh, 760px); display: grid; align-content: center; padding-block: clamp(2rem, 7vw, 4.5rem); }
.hero-card {
  text-align: center; background: var(--surface); border: 1px solid var(--line); border-radius: 26px; box-shadow: var(--shadow);
  padding: clamp(1.6rem, 5vw, 2.8rem) clamp(1.2rem, 4vw, 2.4rem);
}
.avatar {
  display: block; width: 148px; height: 148px; margin: 0 auto 1.3rem; border-radius: 50%; object-fit: cover; object-position: center 25%;
  border: 4px solid var(--surface); box-shadow: 0 0 0 2px var(--accent), var(--shadow); background: var(--tint);
}
.eyebrow { color: var(--accent); font-size: .8rem; letter-spacing: .32em; font-weight: 600; }
.hero h1 { font-size: clamp(2.1rem, 7vw, 3.4rem); line-height: 1.25; margin-top: .4rem; letter-spacing: .08em; }
.role { color: var(--muted); margin-top: .5rem; font-size: clamp(.95rem, 2.6vw, 1.1rem); }
.lead { max-width: 34em; margin: 1.3rem auto 0; }
.cta { margin-top: 1.7rem; display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: .5rem; text-decoration: none; font-weight: 600; padding: .8rem 1.4rem; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); color: var(--text); transition: transform .2s, box-shadow .2s; }
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

/* ===== セクション ===== */
.section { padding-block: clamp(2.2rem, 6vw, 4rem); }
.section h2 {
  display: block; width: fit-content; max-width: 100%; margin-bottom: 1.2rem; padding: .55rem 1.2rem;
  font-size: clamp(1.35rem, 4vw, 1.75rem); line-height: 1.4; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow);
}
.section h2 span { display: block; color: var(--accent); font-size: .72rem; letter-spacing: .26em; text-transform: uppercase; font-weight: 600; }
.section-lead { display: block; width: fit-content; max-width: 100%; margin: 0 0 1.2rem; padding: .45rem 1rem; color: var(--muted); background: var(--surface); border: 1px solid var(--line); border-radius: 12px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: clamp(1.1rem, 3.2vw, 1.8rem); }
.card p + p { margin-top: .9rem; }
.card h3 { font-size: 1rem; margin-bottom: .6rem; padding-left: .7rem; border-left: 3px solid var(--accent); line-height: 1.4; }
.card + .card, .card + .grid-3 { margin-top: 1rem; }

.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); gap: .9rem 1.5rem; margin-top: 1.4rem; padding-top: 1.2rem; border-top: 1px dashed var(--line); }
.facts dt { color: var(--muted); font-size: .78rem; letter-spacing: .1em; }
.facts dd { font-weight: 500; }

.quals li { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding: .7rem 0; border-bottom: 1px dashed var(--line); }
.quals li:last-child, .skill-list li:last-child { border-bottom: 0; }
.quals strong { display: block; font-weight: 600; }
.quals small { color: var(--muted); font-size: .8rem; }
.quals time { color: var(--accent); font-weight: 600; white-space: nowrap; font-variant-numeric: tabular-nums; }
.grid-3 { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr)); }
.grid-3 .card + .card { margin-top: 0; }
.skill-list li { display: flex; justify-content: space-between; align-items: center; gap: .8rem; padding: .55rem 0; border-bottom: 1px dashed var(--line); font-size: .95rem; }
.dots { display: inline-flex; gap: 4px; }
.dots i { width: 8px; height: 8px; border-radius: 50%; background: var(--line); }
.dots i.on { background: var(--accent); }

.tiles { display: grid; gap: .8rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr)); }
.tile { display: flex; align-items: center; gap: .9rem; text-decoration: none; padding: .9rem 1rem; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); transition: transform .2s, border-color .2s; }
.tile:hover { transform: translateY(-3px); border-color: var(--accent); }
.ico { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--tint); color: var(--accent); flex: none; }
.ico.badge { font-size: .72rem; font-weight: 800; letter-spacing: .02em; }
.tile-text { display: flex; flex-direction: column; min-width: 0; line-height: 1.5; }
.tile-text b { font-weight: 600; }
.tile-text small { color: var(--muted); overflow-wrap: anywhere; }

.foot { padding: 1.6rem 0 calc(5rem + env(safe-area-inset-bottom)); text-align: center; color: var(--muted); font-size: .82rem; background: var(--surface); border-top: 1px solid var(--line); }
.sample-note { margin-top: .3rem; }

.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }

@media (max-width: 520px) {
  .bar nav { font-size: .8rem; gap: .7rem; }
  .quals li { flex-direction: column; gap: .1rem; }
  .season-chip .cap b { display: none; }
  .season-chip { padding-right: .8rem; }
  .avatar { width: 128px; height: 128px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .tile { transition: none; }
  .mist i { animation: none; }
  .sky, .land { transform: none; }
  .fx { display: none; }
}
@media print {
  .bar, .cta, .skip, .scene, .fx, .season-chip { display: none; }
  html, body { background: #fff; color: #000; }
  .card, .tile, .hero-card { box-shadow: none; }
}