:root {
  color-scheme: dark;
  --bg: #101113;
  --bg-soft: #17191d;
  --ink: #f4f1ea;
  --muted: #c8c0b4;
  --subtle: #8f978f;
  --line: rgba(244, 241, 234, 0.14);
  --teal: #74c7b8;
  --rose: #d98997;
  --gold: #e3bd72;
  --panel: rgba(255, 255, 255, 0.07);
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.32);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 86% 8%, rgba(116, 199, 184, 0.22), transparent 27rem),
    linear-gradient(180deg, #101113 0%, #17130f 54%, #101113 100%);
  color: var(--ink);
  font-family:
    "Yu Gothic", "Hiragino Sans", "Meiryo", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.75;
  letter-spacing: 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  min-height: 72px;
  padding: 0 5vw;
  border-bottom: 1px solid var(--line);
  background: rgba(16, 17, 19, 0.86);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 800;
  white-space: nowrap;
}

.brand-mark {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(227, 189, 114, 0.5);
  border-radius: 6px;
  background: linear-gradient(135deg, rgba(227, 189, 114, 0.18), rgba(116, 199, 184, 0.12));
  color: var(--gold);
  font-size: 0.92rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.nav a {
  transition: color 160ms ease;
}

.nav a:hover {
  color: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  align-items: center;
  gap: 5vw;
  overflow: hidden;
  min-height: calc(100svh - 72px);
  padding: 8vh 5vw 10vh;
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  max-width: 620px;
}

.eyebrow {
  margin: 0 0 0.9rem;
  color: var(--teal);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(2.8rem, 7vw, 6.4rem);
  line-height: 1.05;
  letter-spacing: 0;
  overflow-wrap: normal;
  white-space: nowrap;
}

h2 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.7rem);
  line-height: 1.28;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 0.55rem;
  font-size: 1.08rem;
  letter-spacing: 0;
}

.lead {
  margin: 1.4rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.75rem 1.1rem;
  border-radius: 6px;
  font-weight: 800;
  line-height: 1.2;
}

.button.primary {
  background: var(--ink);
  color: #101113;
}

.button.secondary {
  border: 1px solid var(--line);
  color: var(--ink);
}

.notice {
  max-width: 560px;
  margin: 1.5rem 0 0;
  color: var(--subtle);
  font-size: 0.94rem;
}

.product-visual {
  position: relative;
}

.product-visual::before {
  position: absolute;
  inset: -10%;
  content: "";
  background:
    linear-gradient(135deg, rgba(217, 137, 151, 0.22), transparent 38%),
    linear-gradient(315deg, rgba(116, 199, 184, 0.2), transparent 40%);
  filter: blur(12px);
  opacity: 0.9;
}

.visual-shell {
  position: relative;
  overflow: hidden;
  min-height: 480px;
  border: 1px solid rgba(244, 241, 234, 0.16);
  border-radius: 8px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.11), rgba(255, 255, 255, 0.04)),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.03) 0 1px, transparent 1px 64px);
  box-shadow: var(--shadow);
}

.visual-topbar {
  display: flex;
  gap: 0.45rem;
  height: 46px;
  align-items: center;
  padding: 0 1.1rem;
  border-bottom: 1px solid var(--line);
  background: rgba(16, 17, 19, 0.5);
}

.visual-topbar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--rose);
}

.visual-topbar span:nth-child(2) {
  background: var(--gold);
}

.visual-topbar span:nth-child(3) {
  background: var(--teal);
}

.visual-grid {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 1rem;
  padding: 1.15rem;
}

.visual-panel,
.visual-cards article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(16, 17, 19, 0.52);
}

.visual-panel {
  min-height: 370px;
  padding: 1rem;
}

.panel-title {
  width: 72%;
  height: 14px;
  margin-bottom: 1rem;
  border-radius: 999px;
  background: rgba(244, 241, 234, 0.32);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.tag-list span,
.card-lines span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0.32rem 0.6rem;
  border: 1px solid rgba(116, 199, 184, 0.34);
  border-radius: 999px;
  color: #dff6f1;
  background: rgba(116, 199, 184, 0.12);
  font-size: 0.76rem;
  line-height: 1.2;
}

.preference-lines {
  display: grid;
  gap: 0.72rem;
  margin-top: 1.6rem;
}

.preference-lines i {
  display: block;
  height: 42px;
  border-radius: 6px;
  background: linear-gradient(90deg, rgba(244, 241, 234, 0.18), rgba(244, 241, 234, 0.05));
}

.preference-lines i:nth-child(2) {
  width: 86%;
}

.preference-lines i:nth-child(3) {
  width: 68%;
}

.visual-cards {
  display: grid;
  gap: 1rem;
}

.visual-cards article {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 1rem;
  min-height: 176px;
  padding: 1rem;
}

.book-cover {
  min-height: 144px;
  border-radius: 6px;
  background:
    linear-gradient(135deg, rgba(227, 189, 114, 0.92), rgba(217, 137, 151, 0.55)),
    linear-gradient(90deg, rgba(16, 17, 19, 0.22) 0 14px, transparent 14px);
}

.book-cover.alt {
  background:
    linear-gradient(135deg, rgba(116, 199, 184, 0.8), rgba(227, 189, 114, 0.45)),
    linear-gradient(90deg, rgba(16, 17, 19, 0.22) 0 14px, transparent 14px);
}

.card-lines {
  display: grid;
  align-content: center;
  justify-items: start;
  gap: 0.8rem;
}

.card-lines b,
.card-lines i {
  display: block;
  height: 13px;
  border-radius: 999px;
}

.card-lines b {
  width: 86%;
  background: rgba(244, 241, 234, 0.32);
}

.card-lines i {
  width: 62%;
  background: rgba(244, 241, 234, 0.16);
}

.section {
  padding: 6rem 5vw;
  border-bottom: 1px solid var(--line);
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 4vw;
  align-items: start;
  background: rgba(255, 255, 255, 0.02);
}

.section-heading {
  max-width: 680px;
}

.text-block {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.04rem;
}

.text-block p:first-child {
  margin-top: 0;
}

.feature-band {
  background:
    linear-gradient(135deg, rgba(116, 199, 184, 0.12), transparent 36rem),
    #f4efe6;
  color: #17130f;
}

.feature-band .eyebrow {
  color: #27695f;
}

.feature-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(420px, 1.25fr);
  gap: 5vw;
  align-items: start;
}

.feature-copy {
  position: sticky;
  top: 110px;
  max-width: 560px;
}

.feature-copy p {
  margin: 1.1rem 0 0;
  color: #62594f;
  font-size: 1.03rem;
}

.feature-console {
  overflow: hidden;
  border: 1px solid rgba(23, 19, 15, 0.14);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.5)),
    #fbf8f1;
  box-shadow: 0 26px 70px rgba(36, 27, 18, 0.16);
}

.console-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 54px;
  padding: 0 1.2rem;
  border-bottom: 1px solid rgba(23, 19, 15, 0.12);
  color: #665c50;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.console-header i {
  width: 78px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(90deg, #27695f, #d98997, #e3bd72);
}

.feature-steps {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-steps li {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 1.2rem;
  min-height: 132px;
  padding: 1.45rem;
  border-bottom: 1px solid rgba(23, 19, 15, 0.1);
}

.feature-steps li:last-child {
  border-bottom: 0;
}

.step-number {
  display: inline-grid;
  width: 58px;
  height: 58px;
  place-items: center;
  border: 1px solid rgba(39, 105, 95, 0.18);
  border-radius: 8px;
  background: #eff7f4;
  color: #27695f;
  font-size: 0.88rem;
  font-weight: 900;
}

.feature-steps h3 {
  margin: 0 0 0.35rem;
  font-size: 1.16rem;
}

.feature-steps p {
  margin: 0;
  color: #62594f;
  font-size: 0.96rem;
}

.feature-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  margin-top: 1.2rem;
  border: 1px solid rgba(23, 19, 15, 0.12);
  border-radius: 8px;
  background: rgba(23, 19, 15, 0.12);
}

.feature-strip div {
  min-height: 118px;
  padding: 1.1rem;
  background: rgba(255, 255, 255, 0.7);
}

.feature-strip strong {
  display: block;
  margin-bottom: 0.35rem;
}

.feature-strip span {
  display: block;
  color: #62594f;
  font-size: 0.9rem;
  line-height: 1.6;
}

.policy {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 4vw;
}

.policy-list {
  display: grid;
  gap: 0.8rem;
}

.policy-list p {
  margin: 0;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
}

.contact {
  background:
    linear-gradient(135deg, rgba(116, 199, 184, 0.14), transparent 45%),
    rgba(255, 255, 255, 0.03);
}

.contact-inner {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
}

.contact-inner p {
  max-width: 620px;
  color: var(--muted);
}

.mail-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.8rem 1.1rem;
  border: 1px solid rgba(116, 199, 184, 0.42);
  border-radius: 6px;
  color: #dff6f1;
  background: rgba(116, 199, 184, 0.1);
  font-weight: 800;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem 5vw;
  color: var(--subtle);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 920px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.8rem;
    padding-top: 1rem;
    padding-bottom: 1rem;
  }

  .nav {
    width: 100%;
    gap: 0.8rem;
    overflow-x: auto;
    padding-bottom: 0.2rem;
  }

  .hero,
  .intro,
  .policy {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 5rem;
  }

  .feature-layout {
    grid-template-columns: 1fr;
  }

  .feature-copy {
    position: static;
  }

  .feature-strip {
    grid-template-columns: 1fr;
  }

  .contact-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .hero,
  .section {
    padding-right: 1.1rem;
    padding-left: 1.1rem;
  }

  .site-header,
  .site-footer {
    padding-right: 1.1rem;
    padding-left: 1.1rem;
  }

  .hero-actions,
  .button,
  .mail-link {
    width: 100%;
  }

  .product-visual {
    margin-top: 0.5rem;
  }

  .visual-shell {
    min-height: 0;
  }

  .visual-grid,
  .visual-cards article {
    grid-template-columns: 1fr;
  }

  .visual-panel {
    min-height: auto;
  }

  .book-cover {
    min-height: 124px;
  }

  .feature-steps li {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }
}