/* サトリウム 特設サイト — 覚と第三の眼 */

:root {
  color-scheme: dark light;
  --bg:      #120a16;
  --bg-deep: #08040b;
  --panel:   #1c1023;
  --fg:      #f2e8f2;
  --muted:   #b3a0b9;
  --line:    #2f2039;
  --accent:  #ff87b8;
  --accent-soft: #d9a4ff;
  --glow: rgba(255,135,184,.22);
  --shadow: 0 1px 3px rgba(0,0,0,.55), 0 10px 30px rgba(0,0,0,.4);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg:      #fdf8fb;
    --bg-deep: #f6ecf4;
    --panel:   #f9f1f7;
    --fg:      #33223a;
    --muted:   #7a6480;
    --line:    #ecdfe9;
    --accent:  #c2447c;
    --accent-soft: #8a5bb5;
    --glow: rgba(194,68,124,.12);
    --shadow: 0 1px 2px rgba(80,40,80,.08), 0 8px 22px rgba(80,40,80,.08);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  padding: 0 0 6rem;
  font-family: -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.95;
  color: var(--fg);
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

/* 第三の眼のような、中心から滲む光 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 42% at 50% 0%, var(--glow), transparent 68%),
    radial-gradient(ellipse 55% 38% at 88% 78%, var(--glow), transparent 70%),
    linear-gradient(180deg, var(--bg-deep), transparent 45%);
  pointer-events: none;
}

.wrap { max-width: 44rem; margin: 0 auto; padding: 0 1.25rem; }

/* ヒーロー */
.hero { text-align: center; padding: 4.5rem 0 2.5rem; }
.hero .icon {
  width: 118px; height: 118px;
  border-radius: 1.8rem;
  box-shadow: var(--shadow), 0 0 60px var(--glow);
  display: block; margin: 0 auto 1.6rem;
}
.hero h1 {
  font-size: clamp(1.9rem, 6vw, 2.5rem);
  margin: 0;
  letter-spacing: .1em;
  font-weight: 600;
}
.hero .catch {
  color: var(--accent);
  letter-spacing: .16em;
  font-size: .95rem;
  margin: .6rem 0 0;
}
.hero .lede { color: var(--muted); font-size: .96rem; margin: 1.4rem auto 0; max-width: 30rem; }

.badge {
  display: inline-block;
  margin: 1.75rem 0 0;
  padding: .5rem 1.15rem;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--line));
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel) 75%, transparent);
  font-size: .88rem;
}
.badge a { color: var(--accent); }

h2 {
  font-size: 1rem;
  letter-spacing: .18em;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 1.4rem;
  display: flex; align-items: center; gap: .9rem;
}
h2::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, var(--line), transparent); }

h3 { font-size: 1.02rem; margin: 2rem 0 .35rem; }
h3 .n { color: var(--accent); font-size: .85rem; margin-right: .5rem; }

section { padding: 3rem 0 0; }
p { margin: .7rem 0; }
a { color: var(--accent); }
a:hover { color: var(--accent-soft); }
.muted { color: var(--muted); font-size: .9rem; }
ul { padding-left: 1.3rem; }
li { margin: .4rem 0; }

.shots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: .85rem;
  margin: 1.5rem 0;
}
.shots img {
  width: 100%; height: auto;
  border: 1px solid var(--line);
  border-radius: .7rem;
  box-shadow: var(--shadow);
}

.panel {
  background: color-mix(in srgb, var(--panel) 75%, transparent);
  border: 1px solid var(--line);
  border-radius: .75rem;
  padding: 1.1rem 1.25rem;
  margin: 1.4rem 0;
}
.note { border-left: 3px solid var(--accent); }

.pv { position: relative; aspect-ratio: 16 / 9; }
.pv iframe {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  border: 1px solid var(--line);
  border-radius: .7rem;
}
.pv img { width: 100%; height: auto; border: 1px solid var(--line); border-radius: .7rem; }

.steps { counter-reset: s; list-style: none; padding: 0; }
.steps li { counter-increment: s; position: relative; padding-left: 2.5rem; margin: 1.05rem 0; }
.steps li::before {
  content: counter(s);
  position: absolute; left: 0; top: .35rem;
  width: 1.65rem; height: 1.65rem; border-radius: 50%;
  background: var(--accent); color: var(--bg);
  font-size: .8rem; font-weight: 700;
  display: grid; place-items: center;
}

.chips { display: flex; flex-wrap: wrap; gap: .6rem; padding: 0; list-style: none; margin: 1.4rem 0 0; }
.chips a {
  display: inline-block; padding: .5rem 1.1rem;
  border: 1px solid var(--line); border-radius: 999px;
  background: color-mix(in srgb, var(--panel) 75%, transparent);
  text-decoration: none; font-size: .9rem;
  transition: border-color .18s;
}
.chips a:hover { border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); }

nav.crumb { padding: 2.25rem 0 1.25rem; font-size: .87rem; color: var(--muted); }
nav.crumb a { text-decoration: none; }

footer {
  margin-top: 4.5rem; padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted); font-size: .87rem; line-height: 1.85;
}
.sub { color: var(--muted); font-size: .95rem; margin: .4rem 0 2rem; }