:root {
  --night: #02040a;
  --deep-blue: #071b38;
  --gold: #e3ca62;
  --yellow: #ffe33b;
  --silver: #d9dfe9;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--night); }
body {
  margin: 0;
  background: var(--night);
  color: #fff;
  font-family: 'Klee One', "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", serif;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
}

.campaign-page {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(circle at 78% 20%, rgba(97, 135, 197, .2), transparent 26%),
    radial-gradient(circle at 15% 88%, rgba(24, 69, 133, .2), transparent 30%),
    linear-gradient(145deg, #010205 0%, #040914 54%, #082147 100%);
}

.stars {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .72;
  background-image:
    radial-gradient(circle, rgba(255,255,255,.95) 0 1px, transparent 1.6px),
    radial-gradient(circle, rgba(198,218,255,.8) 0 1.2px, transparent 1.8px),
    radial-gradient(circle, rgba(255,235,140,.55) 0 .8px, transparent 1.4px);
  background-size: 97px 97px, 173px 173px, 61px 61px;
  background-position: 13px 29px, 61px 101px, 29px 17px;
  -webkit-mask-image: linear-gradient(to bottom, #000, rgba(0,0,0,.38));
  mask-image: linear-gradient(to bottom, #000, rgba(0,0,0,.38));
}

.moon-glow {
  position: absolute;
  width: 420px;
  height: 420px;
  top: -190px;
  right: -130px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(255,255,255,.25), rgba(193,211,239,.09) 45%, transparent 70%);
  box-shadow: 0 0 100px rgba(169, 198, 241, .15);
}

.campaign-shell {
  position: relative;
  z-index: 1;
  width: min(1040px, calc(100% - 44px));
  margin: auto;
  padding: clamp(54px, 7vw, 88px) 0 62px;
  display: grid;
  grid-template-columns: minmax(280px, 420px) minmax(0, 1fr);
  align-items: center;
  gap: clamp(44px, 7vw, 92px);
}

.cover-stage { position: relative; width: 100%; }
.cover-halo {
  position: absolute;
  inset: 15% -20% 8%;
  background: radial-gradient(circle, rgba(171, 201, 248, .27), transparent 68%);
  filter: blur(26px);
}
.book-cover {
  position: relative;
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid rgba(255,255,255,.5);
  box-shadow: 0 28px 65px rgba(0,0,0,.65), 0 0 36px rgba(113, 157, 223, .18);
}

.campaign-copy { max-width: 610px; }
.date-label {
  display: inline-block;
  margin: 0 0 20px;
  padding: 9px 15px;
  border: 1px solid rgba(227,202,98,.75);
  color: #fff4a5;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 13px;
  letter-spacing: .08em;
}
.series-label {
  margin: 0 0 18px;
  color: var(--gold);
  font: 11px/1.5 Georgia, "Times New Roman", serif;
  letter-spacing: .3em;
}
h1 { margin: 0 0 26px; font-weight: 500; letter-spacing: .025em; }
h1 span { display: block; font-size: clamp(33px, 4vw, 50px); line-height: 1.48; }
h1 strong {
  display: block;
  margin-top: 17px;
  color: transparent;
  background: linear-gradient(100deg, #fff 5%, #bfc6d0 37%, #fff 64%, #bdc4ce 92%);
  -webkit-background-clip: text;
  background-clip: text;
  font-family: 'Klee One', "Yu Mincho", serif;
  font-size: clamp(27px, 3.4vw, 43px);
  line-height: 1.4;
  letter-spacing: .015em;
}
h1 strong .campaign-heading-line {
  display: block;
  font: inherit;
  line-height: 1.32;
}
.message {
  margin: 0 0 17px;
  color: #fff48b;
  font-family: 'Klee One', "Yu Mincho", serif;
  font-size: clamp(20px, 2.3vw, 27px);
  line-height: 1.75;
  letter-spacing: .05em;
}
.description {
  max-width: 560px;
  margin: 0 0 28px;
  color: #ced5df;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 15px;
  line-height: 1.9;
}
.bonus-note {
  margin: 0 0 26px;
  padding: 16px 18px;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 16px;
  border: 1px solid rgba(227,202,98,.62);
  background: rgba(6, 29, 61, .72);
  box-shadow: inset 0 1px rgba(255,255,255,.05);
}
.bonus-note > span {
  padding: 7px 10px;
  color: #082c5a;
  background: var(--gold);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
}
.bonus-note strong {
  display: block;
  margin-bottom: 4px;
  color: #fff38b;
  font-family: 'Klee One', "Yu Mincho", serif;
  font-size: 17px;
  letter-spacing: .02em;
}
.bonus-note p {
  margin: 0;
  color: #d2d8e2;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 12px;
  line-height: 1.65;
}
.register-button {
  min-height: 72px;
  padding: 13px 17px 13px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: #072d5f;
  background: linear-gradient(100deg, #ffe73c, #f0d333);
  border: 1px solid #fff28a;
  box-shadow: 0 13px 35px rgba(255,220,42,.18), inset 0 1px rgba(255,255,255,.7);
  text-decoration: none;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 17px;
  font-weight: 700;
  transition: transform .2s ease, box-shadow .2s ease;
}
.register-button:hover, .register-button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 18px 42px rgba(255,220,42,.28), inset 0 1px rgba(255,255,255,.7);
}
.register-button:focus-visible { outline: 3px solid #fff; outline-offset: 4px; }
.button-arrow {
  width: 43px;
  height: 43px;
  flex: 0 0 43px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: #08366f;
  font-size: 22px;
}
.button-note {
  margin: 11px 0 0;
  text-align: center;
  color: #969faf;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 11px;
  letter-spacing: .05em;
}

footer {
  position: relative;
  z-index: 1;
  padding: 22px 28px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid rgba(255,255,255,.12);
  color: #7f8999;
  font: 9px/1.4 Georgia, serif;
  letter-spacing: .2em;
}
.mobile-break { display: none; }

@media (max-width: 760px) {
  .campaign-page { min-height: 100svh; }
  .campaign-shell {
    width: min(560px, calc(100% - 36px));
    padding: 42px 0 48px;
    grid-template-columns: 1fr;
    gap: 36px;
    text-align: center;
  }
  .campaign-copy { order: 1; max-width: none; }
  .cover-stage { order: 2; width: min(67vw, 280px); margin: 0 auto; }
  .series-label { margin-top: 0; }
  .description { margin-left: auto; margin-right: auto; }
  .register-button { max-width: 520px; margin: 0 auto; text-align: left; }
  .moon-glow { width: 300px; height: 300px; top: -155px; right: -125px; }
}

@media (max-width: 480px) {
  .campaign-shell { width: calc(100% - 30px); padding-top: 30px; gap: 30px; }
  .date-label { margin-bottom: 17px; font-size: 11px; }
  .series-label { font-size: 9px; letter-spacing: .23em; }
  h1 span { font-size: clamp(29px, 9vw, 38px); }
  h1 strong { font-size: clamp(24px, 7.7vw, 32px); }
  .message { font-size: 19px; }
  .description { font-size: 13px; line-height: 1.85; }
  .register-button { min-height: 66px; padding-left: 20px; font-size: 14px; }
  .button-arrow { width: 39px; height: 39px; flex-basis: 39px; }
  .cover-stage { width: min(72vw, 270px); }
  .bonus-note { padding: 14px; grid-template-columns: 1fr; gap: 10px; text-align: left; }
  .bonus-note > span { justify-self: start; }
  .bonus-note strong { font-size: 15px; }
  .bonus-note p { font-size: 11px; }
  footer { flex-direction: column; align-items: center; padding: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  .register-button { transition: none; }
}

/* ── 追加セクション共通 ── */
.content-sections {
  position: relative;
  z-index: 1;
  background: linear-gradient(to bottom, transparent, rgba(255,255,255,.04) 15%, rgba(255,255,255,.06) 50%, rgba(255,255,255,.04));
}

.c-inner {
  width: min(1040px, calc(100% - 44px));
  margin: 0 auto;
  padding: clamp(60px, 8vw, 96px) 0;
  border-top: 1px solid rgba(255,255,255,.18);
}

.c-eye {
  margin: 0 0 16px;
  color: var(--gold);
  font: 11px/1.5 Georgia, "Times New Roman", serif;
  letter-spacing: .3em;
}

.c-head {
  margin: 0 0 26px;
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 500;
  letter-spacing: .03em;
  line-height: 1.4;
}

.c-lead {
  max-width: 720px;
  margin: 0 0 44px;
  color: #ced5df;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 15px;
  line-height: 2;
}

.c-sub {
  margin: -14px 0 36px;
  color: #b0c4d8;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 14px;
}

/* ── 目次リスト ── */
.toc-list {
  list-style: none;
  padding: 36px 48px;
  margin: 0;
  max-width: 680px;
  background: rgba(240, 243, 252, .92);
  box-shadow: 0 8px 40px rgba(0,0,0,.35), inset 0 1px rgba(255,255,255,.8);
}

.toc-item {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(10,20,60,.1);
  align-items: baseline;
}

.toc-item:first-child { border-top: 1px solid rgba(10,20,60,.1); }

.toc-num {
  color: #8a6e28;
  font-family: 'Klee One', "Yu Mincho", serif;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .1em;
  white-space: nowrap;
}

.toc-title {
  color: #1a2035;
  font-family: 'Klee One', "Yu Mincho", serif;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .06em;
  line-height: 1.7;
}

.chap-label {
  display: block;
  margin-bottom: 10px;
  color: var(--gold);
  font: 10px/1.5 Georgia, serif;
  letter-spacing: .22em;
  opacity: .8;
}

.chap-card h3 {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 500;
  letter-spacing: .03em;
}

.chap-card p {
  margin: 0;
  color: #c0d4e8;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 13px;
  line-height: 1.85;
}

/* ── 特典カード ── */
.gift-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.gift-card {
  padding: 22px 20px;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.2);
}

.gift-card--freq {
  background: rgba(255,255,255,.05);
  border-color: rgba(255,255,255,.18);
}

.gift-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.gift-ch {
  color: var(--gold);
  font: 10px/1.5 Georgia, serif;
  letter-spacing: .18em;
  opacity: .85;
}

.gift-ch--freq {
  color: var(--silver);
  opacity: .75;
}

.gift-dur {
  color: #a0b8cc;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 12px;
  letter-spacing: .05em;
}

.gift-card h3 {
  margin: 0 0 10px;
  font-family: 'Klee One', "Yu Mincho", serif;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .04em;
  line-height: 1.4;
}

.gift-card p {
  margin: 0;
  color: #c0d4e8;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 13px;
  line-height: 1.85;
}

/* ── 著者プロフィール ── */
.author-card {
  padding: 48px 40px;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.22);
  text-align: center;
}

.series-banner {
  width: min(1040px, calc(100% - 44px));
  margin: 36px auto 0;
  border-radius: 6px;
  overflow: hidden;
}

.series-img {
  width: 100%;
  height: auto;
  display: block;
}

.author-name {
  margin: 0 0 10px;
  font-family: 'Klee One', "Yu Mincho", serif;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: .12em;
}

.author-role {
  margin: 0 0 22px;
  color: var(--gold);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 12px;
  letter-spacing: .08em;
  line-height: 1.7;
}

.author-bio-text {
  max-width: 560px;
  margin: 0 auto 16px;
  color: #ced5df;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 14px;
  line-height: 2;
}

.author-site {
  margin: 0;
  color: #a0b8cc;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-size: 11px;
  letter-spacing: .06em;
  line-height: 1.7;
}

/* ── 下部CTA ── */
.c-inner--cta { text-align: center; }

.cta-catch {
  margin: 0 0 16px;
  color: #fff48b;
  font-family: 'Klee One', "Yu Mincho", serif;
  font-size: clamp(20px, 2.3vw, 28px);
  line-height: 1.75;
  letter-spacing: .05em;
}

.cta-bottom .description {
  margin-left: auto;
  margin-right: auto;
}

.cta-btn-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 0;
}

.cta-btn-wrap .register-button {
  max-width: 480px;
  flex: 1;
}

/* ── レスポンシブ（追加分） ── */
@media (max-width: 760px) {
  .c-inner { width: min(560px, calc(100% - 36px)); }
  .chap-grid { grid-template-columns: 1fr; gap: 14px; }
  .chap-card, .chap-card--wide { grid-column: span 1; }
  .gift-grid { grid-template-columns: 1fr; }
  .author-card { padding: 32px 24px; }
}

@media (max-width: 480px) {
  .c-inner { width: calc(100% - 30px); }
  .chap-card, .gift-card { padding: 18px 16px; }
  .author-card { padding: 22px 18px; }
  .cta-btn-wrap .register-button { font-size: 14px; }
}