/* serieril.jp index — photo-first, single-flow layout
   写真(マイク)を一枚だけ全面に敷き、テキストは左の暗部に通常フローで重ねる。
   アクセントはWebアプリ群と同系のティール(ダーク用に明度を上げた #8fd8cb)。 */

:root {
  color-scheme: dark;
  --ink: #f5f5f2;
  --muted: rgba(245, 245, 242, 0.72);
  --dim: rgba(245, 245, 242, 0.5);
  --line: rgba(245, 245, 242, 0.22);
  --accent: #8fd8cb;
  --serif:
    "Hiragino Mincho ProN",
    "Yu Mincho",
    "YuMincho",
    "Noto Serif JP",
    Georgia,
    serif;
  --sans:
    "Inter",
    "Helvetica Neue",
    system-ui,
    Arial,
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: #050505;
}

body {
  min-height: 100svh;
  margin: 0;
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.6;
  background:
    linear-gradient(
      100deg,
      rgba(5, 5, 5, 0.88) 0%,
      rgba(5, 5, 5, 0.72) 36%,
      rgba(5, 5, 5, 0.30) 62%,
      rgba(5, 5, 5, 0.18) 100%
    ),
    url("images/index_1920.jpg") center / cover no-repeat fixed #050505;
}

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

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 2px;
}

/* ----- layout: 通常フロー、上下3ブロック ----- */
.page {
  min-height: 100svh;
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(28px, 6vh, 72px) clamp(22px, 5vw, 64px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: clamp(36px, 7vh, 84px);
}

/* ----- masthead ----- */
.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-family: var(--sans);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: 0.02em;
}

h1 .reading {
  display: inline-block;
  margin-left: 0.2em;
  color: var(--muted);
  font-size: 0.42em;
  letter-spacing: 0.08em;
}


/* ----- links ----- */
.links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: clamp(26px, 4vw, 48px);
  max-width: 820px;
}

.link-group {
  margin: 0;
}

.group-label {
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  color: var(--dim);
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.link-group ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.link-group a {
  display: inline-block;
  font-size: clamp(1rem, 1.4vw, 1.12rem);
  line-height: 1.45;
  text-shadow: 0 1px 14px rgba(0, 0, 0, 0.8);
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.link-group a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.link-group ul.sub-links {
  margin: 1px 0 2px;
  padding-left: 0.7rem;
  list-style: none;
  display: grid;
  gap: 2px;
}

.sub-links li {
  margin: 0;
}

.sub-links a {
  font-size: 0.95rem;
  line-height: 1.22;
  color: var(--muted);
}

.sub-links a:hover {
  color: var(--accent);
}

.note {
  display: block;
  margin-bottom: 2px;
  color: var(--dim);
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

/* ----- tagline / footer ----- */
.tagline {
  max-width: 720px;
}

.statement {
  margin: 0;
  font-size: clamp(1.15rem, 2.4vw, 1.65rem);
  font-weight: 500;
  line-height: 1.5;
  text-shadow: 0 1px 18px rgba(0, 0, 0, 0.8);
}

.address {
  margin: 10px 0 0;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
}

.share-link {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  margin-top: 16px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  transition: color 0.15s, border-color 0.15s;
}

.share-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ----- responsive ----- */
@media (max-width: 760px) {
  body {
    background:
      linear-gradient(
        180deg,
        rgba(5, 5, 5, 0.85) 0%,
        rgba(5, 5, 5, 0.6) 45%,
        rgba(5, 5, 5, 0.8) 100%
      ),
      url("images/index_800.jpg") 62% center / cover no-repeat scroll #050505;
  }

  .page {
    justify-content: flex-start;
  }
}