:root {
  --ink: #142b2c;
  --ink-soft: #274344;
  --paper: #f7f3ea;
  --paper-deep: #eee7da;
  --white: #fffdf8;
  --green: #176c63;
  --green-dark: #0d514b;
  --mint: #b8d8cc;
  --copper: #a94c2d;
  --line: rgba(20, 43, 44, 0.16);
  --shadow: 0 24px 70px rgba(20, 43, 44, 0.12);
  --radius: 22px;
  --shell: min(1120px, calc(100% - 40px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 3px;
  box-shadow: 0 0 0 6px var(--white);
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 8px 14px;
  color: white;
  background: var(--ink);
  border-radius: 8px;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(20, 43, 44, 0.1);
  background: rgba(247, 243, 234, 0.92);
  backdrop-filter: blur(14px);
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.site-name {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  line-height: 1.2;
  letter-spacing: 0.06em;
  text-decoration: none;
  white-space: nowrap;
}

.site-name strong {
  font-size: 15px;
  letter-spacing: 0.12em;
}

.site-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  color: var(--paper);
  background: var(--ink);
  border-radius: 50%;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 18px;
}

.site-nav {
  display: flex;
  gap: 28px;
  margin-left: auto;
}

.site-nav a {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
}

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

.button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 24px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  color: var(--white);
  background: var(--ink);
  box-shadow: 0 8px 20px rgba(20, 43, 44, 0.14);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.4;
  text-decoration: none;
  transition: transform 180ms ease, background 180ms ease;
}

.button:hover {
  background: var(--green-dark);
  box-shadow: 0 12px 28px rgba(20, 43, 44, 0.2);
  transform: translateY(-2px);
}

.button-small {
  min-height: 44px;
  padding: 8px 18px;
  font-size: 12px;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 108px 0 104px;
  background:
    radial-gradient(circle at 78% 22%, rgba(184, 216, 204, 0.58), transparent 28%),
    linear-gradient(90deg, rgba(20, 43, 44, 0.045) 1px, transparent 1px),
    linear-gradient(rgba(20, 43, 44, 0.045) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
}

.hero::after {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  right: -180px;
  bottom: -260px;
  border: 1px solid rgba(20, 43, 44, 0.18);
  border-radius: 50%;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.22fr) minmax(330px, 0.78fr);
  gap: clamp(56px, 8vw, 112px);
  align-items: center;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  display: inline-block;
  margin: 0 10px 4px 0;
  background: currentColor;
}

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

h1,
h2 {
  margin: 0;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", serif;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.35;
}

h1 {
  font-size: clamp(42px, 5.7vw, 76px);
}

h1 em {
  position: relative;
  color: var(--green);
  font-style: normal;
}

h1 em::after {
  content: "";
  position: absolute;
  z-index: -1;
  right: -3px;
  bottom: 3px;
  left: -3px;
  height: 12px;
  background: rgba(184, 216, 204, 0.7);
}

h2 {
  font-size: clamp(32px, 4vw, 50px);
}

h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.5;
}

.hero-lead {
  max-width: 690px;
  margin: 32px 0 0;
  color: var(--ink-soft);
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 2;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 22px;
  margin-top: 38px;
}

.text-link {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  font-size: 14px;
  font-weight: 700;
  text-underline-offset: 5px;
}

.hero-panel {
  position: relative;
  padding: 30px;
  color: var(--white);
  background: var(--ink);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero-panel::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 16px -16px -16px 16px;
  border: 1px solid rgba(20, 43, 44, 0.2);
  border-radius: inherit;
}

.panel-kicker {
  margin: 0 0 22px;
  color: var(--mint);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.decision-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.decision-list li {
  display: flex;
  gap: 15px;
  align-items: center;
  padding: 18px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.decision-list span {
  color: var(--mint);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
}

.decision-list strong {
  font-size: 15px;
}

.panel-result {
  display: flex;
  gap: 15px;
  align-items: center;
  margin-top: 16px;
  padding: 18px;
  color: var(--ink);
  background: var(--mint);
  border-radius: 15px;
}

.panel-result > span {
  font-size: 24px;
}

.panel-result p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
}

.principles {
  color: var(--white);
  background: var(--green-dark);
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.principle-grid > div {
  display: flex;
  gap: 14px;
  align-items: center;
  min-height: 102px;
  padding: 22px 30px;
  border-left: 1px solid rgba(255, 255, 255, 0.16);
}

.principle-grid > div:last-child {
  border-right: 1px solid rgba(255, 255, 255, 0.16);
}

.principle-grid span {
  color: var(--mint);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
}

.principle-grid p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
}

.section {
  padding: 112px 0;
}

.section-warm {
  background: var(--paper-deep);
}

.two-column-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 80px;
  align-items: end;
  margin-bottom: 54px;
}

.section-intro {
  margin: 0 0 4px;
  color: #536160;
  font-size: 15px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.problem-card {
  min-height: 222px;
  grid-column: span 2;
  padding: 26px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.problem-card:nth-child(4),
.problem-card:nth-child(5) {
  grid-column: span 3;
}

.problem-card-accent {
  color: var(--white);
  background: var(--green);
  border-color: var(--green);
}

.card-number {
  display: block;
  margin-bottom: 32px;
  color: var(--copper);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
}

.problem-card-accent .card-number {
  color: #d9eee7;
}

.problem-card p {
  margin: 12px 0 0;
  color: #5d6968;
  font-size: 14px;
}

.problem-card-accent p {
  color: #e4f0ec;
}

.process-list {
  margin-top: 0;
  margin-bottom: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.process-list li {
  display: grid;
  grid-template-columns: 70px 150px 1fr;
  gap: 24px;
  align-items: center;
  min-height: 112px;
  border-bottom: 1px solid var(--line);
}

.process-list .step-number {
  color: var(--copper);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
}

.process-list li div {
  display: contents;
}

.process-list h3 {
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 26px;
}

.process-list p {
  margin: 0;
  color: #536160;
}

.section-ink {
  color: var(--white);
  background: var(--ink);
}

.inverse .eyebrow {
  color: var(--mint);
}

.inverse .section-intro {
  color: #c3cfcc;
}

.example-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  border-left: 1px solid rgba(255, 255, 255, 0.18);
}

.example-grid article {
  min-height: 190px;
  padding: 26px;
  border-right: 1px solid rgba(255, 255, 255, 0.18);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.example-grid span {
  color: var(--mint);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
}

.example-grid h3 {
  margin-top: 34px;
  font-size: 20px;
}

.example-grid p {
  margin: 8px 0 0;
  color: #bcc9c7;
  font-size: 14px;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.case-card {
  display: flex;
  flex-direction: column;
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(20, 43, 44, 0.06);
}

.case-type {
  margin: 0 0 18px;
  color: var(--green);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.case-card h3 {
  min-height: 82px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.case-card dl {
  margin: 10px 0 0;
}

.case-card dl div {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 10px;
  padding-top: 14px;
}

.case-card dt {
  color: var(--copper);
  font-size: 11px;
  font-weight: 800;
}

.case-card dd {
  margin: 0;
  color: #596665;
  font-size: 13px;
  line-height: 1.75;
}

.section-safety {
  padding: 0;
  background: var(--mint);
}

.safety-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 72px;
  padding-top: 86px;
  padding-bottom: 86px;
}

.safety-heading p:last-child {
  max-width: 440px;
  margin: 24px 0 0;
  color: #31504e;
}

.safety-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(20, 43, 44, 0.2);
  list-style: none;
}

.safety-list li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(20, 43, 44, 0.2);
  font-size: 14px;
  font-weight: 700;
}

.safety-list span {
  color: var(--green-dark);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
}

.profile-card {
  display: grid;
  grid-template-columns: 220px 1fr;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.profile-label {
  display: grid;
  place-items: center;
  padding: 30px;
  color: var(--mint);
  background: var(--ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.16em;
  line-height: 2;
  text-align: center;
}

.profile-copy {
  padding: 52px 58px;
}

.profile-copy h2 {
  font-size: clamp(30px, 3.5vw, 43px);
}

.profile-copy > p:not(.eyebrow):not(.profile-title) {
  margin: 24px 0 0;
  color: #536160;
}

.profile-copy .profile-name {
  margin: 28px 0 0;
  color: var(--ink);
  font-family: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", serif;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.profile-title {
  margin: 24px 0 0;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.contact-section {
  padding: 24px 0 96px;
}

.contact-card {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  align-items: center;
  padding: 58px;
  color: var(--white);
  background: var(--green-dark);
  border-radius: 28px;
}

.contact-card .eyebrow {
  color: var(--mint);
}

.contact-card h2 {
  font-size: clamp(30px, 3.7vw, 46px);
}

.contact-card > div {
  max-width: 780px;
}

.contact-card p:not(.eyebrow) {
  margin: 18px 0 24px;
  color: #d5e6e1;
}

.contact-card .contact-email {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.contact-email a,
.footer-inner a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.button-light {
  color: var(--ink);
  background: var(--white);
  border-color: var(--white);
}

.button-light:hover {
  color: var(--white);
}

.site-footer {
  padding: 30px 0;
  color: #c4d0cd;
  background: var(--ink);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  align-items: end;
}

.footer-inner p {
  margin: 0;
  font-size: 11px;
}

.footer-inner p:last-child {
  text-align: right;
}

@media (max-width: 900px) {
  .site-nav {
    display: none;
  }

  .header-cta {
    margin-left: auto;
  }

  .hero-grid,
  .two-column-heading,
  .safety-layout {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 58px;
  }

  .two-column-heading {
    gap: 24px;
  }

  .section-intro {
    max-width: 640px;
  }

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

  .case-card h3 {
    min-height: 0;
  }

  .profile-card {
    grid-template-columns: 150px 1fr;
  }
}

@media (max-width: 680px) {
  :root {
    --shell: min(100% - 28px, 1120px);
    --radius: 17px;
  }

  html {
    scroll-padding-top: 72px;
  }

  body {
    font-size: 15px;
  }

  .header-inner {
    min-height: 68px;
  }

  .site-mark {
    width: 36px;
    height: 36px;
  }

  .site-name strong {
    font-size: 13px;
  }

  .header-cta {
    min-height: 44px;
    padding-inline: 14px;
  }

  .hero {
    padding: 68px 0 78px;
    background-size: auto, 32px 32px, 32px 32px;
  }

  .hero-grid {
    gap: 48px;
  }

  h1 {
    font-size: clamp(38px, 11vw, 52px);
  }

  h2 {
    font-size: 31px;
  }

  .hero-lead {
    margin-top: 24px;
    line-height: 1.9;
  }

  .hero-actions {
    align-items: stretch;
    margin-top: 28px;
  }

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

  .hero-panel {
    padding: 24px;
    border-radius: 22px;
  }

  .principle-grid {
    grid-template-columns: 1fr;
    padding: 16px 0;
  }

  .principle-grid > div,
  .principle-grid > div:last-child {
    min-height: auto;
    padding: 13px 6px;
    border: 0;
  }

  .section {
    padding: 76px 0;
  }

  .two-column-heading {
    margin-bottom: 34px;
  }

  .problem-grid,
  .example-grid {
    grid-template-columns: 1fr;
  }

  .problem-card,
  .problem-card:nth-child(4),
  .problem-card:nth-child(5) {
    min-height: 0;
    grid-column: auto;
  }

  .card-number {
    margin-bottom: 20px;
  }

  .example-grid article {
    min-height: 0;
  }

  .example-grid h3 {
    margin-top: 20px;
  }

  .process-list li {
    grid-template-columns: 38px 1fr;
    gap: 14px;
    min-height: 0;
    padding: 22px 0;
  }

  .process-list li div {
    display: block;
  }

  .process-list h3 {
    font-size: 21px;
  }

  .process-list p {
    margin-top: 4px;
    font-size: 13px;
  }

  .safety-layout {
    gap: 40px;
    padding-top: 66px;
    padding-bottom: 66px;
  }

  .profile-card {
    grid-template-columns: 1fr;
  }

  .profile-label {
    display: none;
  }

  .profile-copy {
    padding: 32px 26px;
  }

  .contact-section {
    padding-bottom: 70px;
  }

  .contact-card {
    display: grid;
    padding: 34px 26px;
  }

  .footer-inner {
    display: block;
  }

  .footer-inner p:last-child {
    margin-top: 14px;
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

.button:focus-visible {
  box-shadow: 0 0 0 6px var(--white);
}