:root {
  color-scheme: light;
  --ink: #1d1920;
  --muted: #6e646c;
  --paper: #fff9f4;
  --card: #ffffff;
  --accent: #e84962;
  --accent-soft: #ffeaed;
  --line: #eadfd8;
  --max: 1040px;
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", system-ui, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--paper); line-height: 1.8; }
a { color: inherit; }
.site-header { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 18px max(24px, calc((100vw - var(--max)) / 2)); background: color-mix(in srgb, var(--paper) 92%, transparent); border-bottom: 1px solid var(--line); backdrop-filter: blur(16px); }
.brand { color: var(--ink); font-size: 22px; font-weight: 900; letter-spacing: .12em; text-decoration: none; }
nav, .footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
nav a, .footer-links a { color: var(--muted); font-size: 14px; font-weight: 700; text-decoration: none; }
nav a:hover, .footer-links a:hover { color: var(--accent); }
main { min-height: 70vh; }
.hero, .page { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }
.hero { display: grid; grid-template-columns: 1.2fr .8fr; gap: 56px; align-items: center; min-height: 72vh; padding: 72px 0; }
.eyebrow { color: var(--accent); font-weight: 900; letter-spacing: .08em; }
h1 { margin: 12px 0 18px; font-size: clamp(42px, 6vw, 72px); line-height: 1.08; letter-spacing: -.04em; }
.hero-line { white-space: nowrap; }
.lead { max-width: 620px; color: var(--muted); font-size: clamp(17px, 2.2vw, 21px); }
.hero-art { position: relative; min-height: 430px; overflow: hidden; border-radius: 36px; background: linear-gradient(145deg, #18151b 0%, #583447 58%, var(--accent) 100%); box-shadow: 0 28px 70px #2f17262b; }
.hero-art::before { content: "このサキ、どうなる？"; position: absolute; inset: 45% 24px auto; color: white; font-size: clamp(24px, 3vw, 38px); font-weight: 900; text-align: center; }
.hero-art::after { content: "第5話を読んだあなたが、次の物語をつくる。"; position: absolute; inset: auto 32px 44px; color: #ffffffb8; text-align: center; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 48px; }
.feature { padding: 24px; background: var(--card); border: 1px solid var(--line); border-radius: 22px; }
.feature strong { display: block; margin-bottom: 8px; }
.page { padding: 64px 0 100px; }
.page h1 { font-size: clamp(34px, 6vw, 58px); }
.page h2 { margin-top: 48px; font-size: 24px; line-height: 1.4; }
.page h3 { margin-top: 28px; font-size: 18px; }
.page p, .page li { color: #514950; }
.page section { max-width: 760px; }
/* 運営者の表示。項目名と内容を横に並べ、狭い画面では縦へ落とす。 */
.operator { display: grid; grid-template-columns: 6em 1fr; gap: 6px 16px; margin: 16px 0; }
.operator dt { color: #8b8189; font-size: 14px; }
.operator dd { margin: 0; color: #514950; }
@media (max-width: 520px) { .operator { grid-template-columns: 1fr; gap: 2px; } .operator dd { margin-bottom: 10px; } }
.meta { color: var(--muted); font-size: 14px; }
.notice { margin: 28px 0; padding: 18px 20px; background: var(--accent-soft); border-radius: 16px; }
.faq { padding: 22px 0; border-bottom: 1px solid var(--line); }
.faq h3 { margin: 0 0 6px; }
form { max-width: 680px; margin-top: 36px; padding: 28px; background: white; border: 1px solid var(--line); border-radius: 24px; }
label { display: block; margin: 18px 0 7px; font-weight: 800; }
input, select, textarea { width: 100%; padding: 13px 14px; color: var(--ink); background: #fff; border: 1px solid #d9cec8; border-radius: 12px; font: inherit; }
textarea { min-height: 180px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 3px solid #e8496228; border-color: var(--accent); }
.honeypot { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
button, .button { display: inline-flex; justify-content: center; margin-top: 22px; padding: 13px 22px; color: white; background: var(--accent); border: 0; border-radius: 999px; font: inherit; font-weight: 900; text-decoration: none; cursor: pointer; }
button:hover, .button:hover { filter: brightness(.94); }
footer { padding: 38px 20px; background: #211d22; color: white; }
.footer-inner { display: grid; gap: 18px; width: min(var(--max), 100%); margin: auto; }
.footer-links a, footer small { color: #ffffffa8; }
@media (max-width: 760px) {
  .site-header { align-items: flex-start; padding: 15px 20px; }
  .site-header nav { gap: 11px; justify-content: flex-end; }
  .site-header nav a { font-size: 12px; }
  .hero { grid-template-columns: 1fr; gap: 30px; padding: 48px 0 72px; }
  .hero-line { white-space: normal; }
  .hero-art { min-height: 360px; }
  .feature-grid { grid-template-columns: 1fr; }
  form { padding: 20px; }
}