@charset "utf-8";
/* mokuhyou.study-set.com 『目標の正体』読者専用ページ
   配色は表紙に合わせる：淡い朱色（コーラル）×青×白 */

:root {
  --coral: #f2917e;
  --coral-light: #fbe3dd;
  --blue: #2f7fc1;
  --blue-dark: #1b4965;
  --ink: #2b2b2b;
  --paper: #ffffff;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.9;
}

/* ===== ヒーロー ===== */
.hero {
  background: var(--coral-light);
  text-align: center;
  padding: 48px 20px 56px;
  border-bottom: 4px solid var(--coral);
}
.hero img.cover {
  width: 280px;
  max-width: 80%;
  height: auto;
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
  border-radius: 4px;
}
.hero h1 {
  font-size: 1.7rem;
  margin-top: 28px;
  color: var(--ink);
  letter-spacing: .05em;
}
.hero .subtitle {
  font-size: 1rem;
  color: #555;
  margin-top: 6px;
}
.hero .author {
  font-size: .95rem;
  color: #777;
  margin-top: 4px;
}
.hero .lead {
  max-width: 640px;
  margin: 22px auto 0;
  font-size: 1rem;
  text-align: left;
}
.amazon-btn {
  display: inline-block;
  margin-top: 26px;
  background: var(--blue);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 14px 44px;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(47,127,193,.4);
  transition: transform .15s, box-shadow .15s;
}
.amazon-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(47,127,193,.5);
}
.amazon-note {
  font-size: .8rem;
  color: #888;
  margin-top: 10px;
}
.ai-publishing-cta {
  max-width: 520px;
  margin: 40px auto 0;
  padding: 22px 26px 24px;
  background: rgba(255,255,255,.75);
  border-radius: 14px;
  box-shadow: 0 2px 12px rgba(0,0,0,.05);
  text-align: center;
}
.ai-publishing-cta p {
  font-size: .88rem;
  color: #555;
  text-align: left;
  margin: 0 0 14px;
  line-height: 1.8;
}
.ai-pub-btn {
  display: inline-block;
  background: transparent;
  color: var(--coral);
  text-decoration: none;
  font-weight: 600;
  font-size: .92rem;
  padding: 9px 28px;
  border-radius: 999px;
  border: 1.5px solid var(--coral);
  transition: background .15s, color .15s;
}
.ai-pub-btn:hover {
  background: var(--coral);
  color: #fff;
}

/* ===== シリーズ他作品（KDP本棚スタイル） ===== */
.series-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 26px;
}
.series-row {
  display: flex;
  gap: 26px;
  padding: 22px 24px;
  background: #fff;
  border: 1px solid #e8e8e8;
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  transition: transform .15s, box-shadow .15s, border-color .15s;
}
.series-row:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(0,0,0,.06);
  border-color: var(--coral);
}
.series-row img {
  width: 110px;
  height: auto;
  flex-shrink: 0;
  border-radius: 4px;
  align-self: flex-start;
  box-shadow: 0 2px 8px rgba(0,0,0,.18);
}
.series-meta {
  flex: 1;
  min-width: 0;
}
.series-num {
  display: inline-block;
  font-size: .7rem;
  background: #eef3f8;
  color: var(--blue-dark);
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 4px;
  margin-bottom: 8px;
  letter-spacing: .08em;
}
.series-row h3 {
  font-size: 1.15rem;
  margin: 0 0 4px;
  color: var(--ink);
  line-height: 1.45;
  font-weight: 700;
}
.series-author {
  font-size: .8rem;
  color: #888;
  margin: 0 0 12px;
}
.series-desc {
  font-size: .88rem;
  color: #555;
  margin: 0 0 14px;
  line-height: 1.75;
}
.series-btn {
  display: inline-block;
  font-size: .85rem;
  color: var(--blue);
  font-weight: 600;
}
@media (max-width: 600px) {
  .series-row {
    padding: 16px;
    gap: 14px;
  }
  .series-row img {
    width: 84px;
  }
  .series-row h3 {
    font-size: 1rem;
  }
}

/* ===== 本文セクション ===== */
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 20px 0;
}
section {
  margin-top: 56px;
}
main > section:first-child {
  margin-top: 0;
}
section h2 {
  font-size: 1.35rem;
  color: var(--blue-dark);
  border-left: 8px solid var(--coral);
  padding-left: 14px;
  margin-bottom: 22px;
  line-height: 1.5;
}
section h3 {
  font-size: 1.1rem;
  color: var(--blue-dark);
  margin: 30px 0 12px;
}
section p {
  margin-bottom: 1em;
}
.preparing {
  background: #f6f6f6;
  border: 1px dashed #ccc;
  border-radius: 8px;
  padding: 24px;
  color: #888;
  text-align: center;
}

/* ===== 要点解説〜最前線ブロック（背景色で区切り） ===== */
.essence-bg {
  background: #faf6ef;
  padding: 60px 0 80px;
  margin-top: 56px;
  border-top: 1px solid #ece4d4;
}
.essence-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}

footer {
  background: var(--blue-dark);
  color: #fff;
  text-align: center;
  padding: 28px 20px;
  font-size: .85rem;
  line-height: 1.8;
}

footer p {
  margin: .2em 0;
}

/* Tablet readability */
@media (min-width: 601px) and (max-width: 1366px) {
  .hero {
    padding: 56px 32px 64px;
  }
  .hero img.cover {
    width: 320px;
  }
  .hero h1 {
    font-size: 2rem;
  }
  .hero .subtitle {
    font-size: 1.08rem;
  }
  .hero .author {
    font-size: 1rem;
  }
  .hero .lead {
    max-width: 720px;
    font-size: 1.08rem;
    line-height: 1.95;
  }
  .amazon-btn {
    font-size: 1.1rem;
    padding: 15px 48px;
  }
  .amazon-note {
    font-size: .9rem;
  }
  .ai-publishing-cta {
    max-width: 640px;
    padding: 26px 32px;
  }
  .ai-publishing-cta p {
    font-size: 1rem;
    line-height: 1.9;
  }
  .ai-pub-btn {
    font-size: 1rem;
    padding: 10px 32px;
  }
  main,
  .essence-inner {
    max-width: 820px;
    padding-left: 32px;
    padding-right: 32px;
  }
  section {
    margin-top: 64px;
  }
  section h2 {
    font-size: 1.55rem;
  }
  section h3 {
    font-size: 1.28rem;
    margin-top: 36px;
  }
  section p {
    font-size: 1.08rem;
    line-height: 1.95;
  }
  .series-row {
    gap: 30px;
    padding: 26px 30px;
  }
  .series-row img {
    width: 132px;
  }
  .series-num {
    font-size: .82rem;
  }
  .series-row h3 {
    font-size: 1.32rem;
  }
  .series-author {
    font-size: .92rem;
  }
  .series-desc {
    font-size: 1rem;
    line-height: 1.85;
  }
  .series-btn {
    font-size: .96rem;
  }
  footer {
    font-size: .95rem;
  }
}

@media (max-width: 600px) {
  .hero {
    padding: 36px 16px 44px;
  }
  .hero h1 {
    font-size: 1.35rem;
  }
  .hero .lead {
    font-size: .95rem;
  }
  .ai-publishing-cta {
    padding: 20px;
    border-radius: 10px;
  }
  main {
    padding: 34px 16px 0;
  }
  .essence-bg {
    padding: 48px 0 64px;
    margin-top: 44px;
  }
  .essence-inner {
    padding: 0 16px;
  }
  section {
    margin-top: 44px;
  }
  section h2 {
    font-size: 1.2rem;
  }
  section h3 {
    font-size: 1rem;
  }
}