:root {
  --midnight: #07111d;
  --ink: #101820;
  --ash: #d8d2c8;
  --paper: #f4efe6;
  --amber: #c99554;
  --ember: #a64232;
  --line: #12b45b;
  --line-dark: #0d8f48;
  --muted: #9ca7ae;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--midnight);
  color: var(--paper);
  font-family: "Zen Kaku Gothic New", system-ui, sans-serif;
  line-height: 1.9;
  letter-spacing: 0;
}

img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.wrap {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.narrow {
  width: min(680px, calc(100% - 40px));
}

.section-dark {
  background:
    radial-gradient(circle at 78% 12%, rgba(201, 149, 84, 0.15), transparent 28%),
    linear-gradient(135deg, #040910 0%, #0a1724 50%, #11100f 100%);
}

.section-quiet {
  padding: 96px 0;
  background: #0c1118;
}

.section-warm {
  padding: 96px 0;
  background: linear-gradient(180deg, #21170f 0%, #f0e7d8 48%, #efe8dc 100%);
  color: #1f1b17;
}

.section-paper {
  padding: 96px 0;
  background: var(--paper);
  color: #1f1b17;
}

.hero {
  min-height: 100svh;
  padding: 40px 0 70px;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 42px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 20px;
  color: var(--ash);
  font-size: clamp(0.8rem, 1.7vw, 0.95rem);
  border-left: 3px solid var(--amber);
  padding-left: 12px;
}

h1,
h2,
.section-kicker {
  font-family: "Noto Serif JP", serif;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 8.5vw, 6.7rem);
  line-height: 1.05;
  font-weight: 900;
  text-wrap: balance;
}

h2 {
  margin: 0 0 28px;
  font-size: clamp(1.85rem, 4.4vw, 3.5rem);
  line-height: 1.45;
}

.lead {
  margin: 30px 0 0;
  color: #d9e0e4;
  font-size: clamp(1rem, 2.2vw, 1.18rem);
}

.hero-image {
  margin: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.offer-box {
  margin: 32px 0 28px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(244, 239, 230, 0.18);
  border-radius: 8px;
  color: #f3eee6;
}

.offer-box p {
  margin: 0;
}

.offer-label {
  width: max-content;
  max-width: 100%;
  padding: 4px 10px;
  background: var(--ember);
  color: #fff;
  font-weight: 700;
  font-size: 0.86rem;
}

.offer-title {
  margin-top: 16px !important;
  font-family: "Noto Serif JP", serif;
  font-size: clamp(1.5rem, 4vw, 2.15rem);
  font-weight: 900;
}

.offer-box strong {
  display: block;
  margin-top: 16px;
  color: #ffe0a6;
  font-size: 1.1rem;
}

.cta {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: min(100%, 340px);
  min-height: 68px;
  padding: 14px 28px;
  border-radius: 8px;
  background: linear-gradient(180deg, #20ca70 0%, var(--line) 100%);
  color: #fff;
  text-decoration: none;
  font-weight: 900;
  line-height: 1.3;
  box-shadow: 0 14px 34px rgba(18, 180, 91, 0.3);
}

.cta span {
  display: block;
  margin-top: 3px;
  font-size: 0.84rem;
  font-weight: 700;
}

.cta-dark {
  margin: 36px auto 0;
  display: flex;
  width: min(100%, 360px);
  background: linear-gradient(180deg, #ff9e43 0%, #ef7d22 100%);
  box-shadow: 0 14px 34px rgba(167, 75, 16, 0.28);
}

.story,
.letter {
  margin: 0;
  font-family: "Noto Serif JP", serif;
  font-size: clamp(1.16rem, 2.65vw, 1.48rem);
  line-height: 2.15;
  font-weight: 500;
}

.wide-photo {
  width: min(960px, calc(100% - 40px));
  aspect-ratio: 3 / 2;
  margin: 56px auto;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.wide-photo img {
  object-position: center;
}

.split {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 52px;
  align-items: center;
}

.reverse {
  grid-template-columns: 1.05fr 0.95fr;
}

.section-kicker {
  margin: 0 0 28px;
  font-size: clamp(2rem, 5vw, 4.2rem);
  line-height: 1.25;
  font-weight: 900;
}

.panel-photo,
.book-photo {
  display: block;
  margin: 0;
  overflow: hidden;
  box-shadow: var(--shadow);
  border-radius: 8px;
  position: relative;
  z-index: 1;
}

.panel-photo {
  aspect-ratio: 3 / 2;
}

.book-photo {
  aspect-ratio: 1 / 1;
  background: #252525;
}

.benefits {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 680px;
  padding: 0;
  margin: 56px auto 0;
  list-style: none;
}

.benefits li {
  position: relative;
  min-height: 0;
  padding: 22px 22px 22px 60px;
  background: rgba(255, 255, 255, 0.64);
  border: 1px solid rgba(32, 24, 18, 0.12);
  border-radius: 8px;
  font-weight: 700;
  line-height: 1.55;
}

.benefits li::before {
  content: "✓";
  position: absolute;
  top: 22px;
  left: 22px;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  background: var(--line);
  color: #fff;
  border-radius: 50%;
  font-size: 0.85rem;
}

.detail-box {
  padding: 28px;
  border: 1px solid rgba(31, 27, 23, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.56);
}

.detail-box p {
  margin: 0 0 18px;
}

.detail-box p:last-of-type {
  margin-bottom: 0;
}

.cta-in-box {
  width: min(100%, 360px);
  margin: 24px 0 0;
}

.book-title {
  font-family: "Noto Serif JP", serif;
  font-weight: 900;
  font-size: 1.5rem;
  line-height: 1.55;
}

.book-title span {
  font-size: 1rem;
}

.detail-head {
  margin: 24px 0 4px !important;
  color: var(--ember);
  font-weight: 900;
}

.letter {
  margin-top: 72px;
  padding-top: 56px;
  border-top: 1px solid rgba(31, 27, 23, 0.16);
}

.letter span,
.final span {
  color: var(--amber);
}

.final {
  padding: 96px 0 70px;
}

.final .cta {
  width: min(100%, 360px);
  margin: 48px auto 0;
  display: flex;
}

.note {
  margin: 18px 0 0;
  color: var(--muted);
  text-align: center;
  font-size: 0.85rem;
  line-height: 1.75;
}

@media (max-width: 920px) {
  .hero {
    min-height: auto;
    padding-top: 34px;
  }

  .hero-grid,
  .split,
  .reverse {
    grid-template-columns: 1fr;
  }

  .hero-image {
    order: -1;
  }

  .benefits {
    grid-template-columns: 1fr;
  }

  .benefits li {
    min-height: 0;
    padding: 18px 18px 18px 54px;
  }

  .benefits li::before {
    top: 19px;
    left: 18px;
  }
}

@media (max-width: 560px) {
  .wrap,
  .narrow,
  .wide-photo {
    width: min(100% - 28px, 1080px);
  }

  .section-quiet,
  .section-warm,
  .section-paper,
  .final {
    padding: 72px 0;
  }

  .hero-grid {
    gap: 28px;
  }

  .hero-image {
    aspect-ratio: 4 / 5;
  }

  .offer-box,
  .detail-box {
    padding: 20px;
  }

  .wide-photo {
    margin: 42px auto;
    aspect-ratio: 4 / 5;
  }

  .wide-photo img {
    object-position: 42% center;
  }

  .panel-photo {
    aspect-ratio: 4 / 5;
  }

  .story,
  .letter {
    line-height: 2.05;
  }
}