:root {
  --ink: #20232a;
  --muted: #616976;
  --line: #dce2e8;
  --paper: #fbfaf7;
  --surface: #ffffff;
  --forest: #1f5f4b;
  --teal: #197d8a;
  --coral: #c9624b;
  --gold: #d9ad5f;
  --shadow: 0 18px 45px rgba(31, 45, 61, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Segoe UI", "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.65;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(18px, 4vw, 56px);
  background: rgba(251, 250, 247, 0.92);
  border-bottom: 1px solid rgba(220, 226, 232, 0.78);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  color: var(--muted);
  font-size: 14px;
}

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

.hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.55fr);
  align-items: end;
  gap: 28px;
  padding: 110px clamp(18px, 5vw, 72px) 56px;
  background:
    linear-gradient(90deg, rgba(32, 35, 42, 0.82), rgba(32, 35, 42, 0.36), rgba(32, 35, 42, 0.12)),
    url("https://images.unsplash.com/photo-1522708323590-d24dbb6b0267?auto=format&fit=crop&w=2200&q=80") center / cover;
  color: #fff;
}

.hero-copy {
  max-width: 860px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.04;
  letter-spacing: 0;
}

.lead {
  max-width: 620px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button,
button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 11px 18px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.button.primary,
button {
  background: var(--coral);
  color: #fff;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.42);
}

.hero-panel {
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(18px);
}

.hero-panel span,
.metrics span,
.category-card span,
.result span,
.topic-list span {
  color: var(--teal);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.hero-panel span {
  color: var(--gold);
}

.hero-panel strong {
  display: block;
  margin-top: 8px;
  font-size: 24px;
  line-height: 1.25;
}

.hero-panel p {
  color: rgba(255, 255, 255, 0.82);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 0 clamp(18px, 5vw, 72px);
  transform: translateY(-28px);
  background: var(--line);
  box-shadow: var(--shadow);
}

.metrics div {
  min-height: 168px;
  padding: 24px;
  background: var(--surface);
}

.metrics strong {
  display: block;
  margin-top: 10px;
  font-size: 22px;
}

.metrics p,
.category-card p,
.topic-list p,
.quality li,
footer span {
  color: var(--muted);
}

.text-link {
  display: inline-flex;
  margin-top: 12px;
  color: var(--forest);
  font-weight: 800;
}

.text-link:hover {
  color: var(--coral);
}

.section {
  padding: 68px clamp(18px, 5vw, 72px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 26px;
}

h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.12;
  letter-spacing: 0;
}

.category-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 16px;
}

.category-card {
  min-height: 232px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(31, 45, 61, 0.06);
}

.category-card.featured {
  grid-row: span 2;
  padding: 0;
  overflow: hidden;
}

.category-card.featured img {
  width: 100%;
  aspect-ratio: 1.45 / 1;
  object-fit: cover;
}

.category-card.featured div {
  padding: 22px;
}

.category-card h3,
.topic-list h3 {
  margin: 10px 0 8px;
  font-size: 22px;
  line-height: 1.28;
}

.tool-band {
  background: #eef5f3;
}

.tool-layout {
  display: grid;
  grid-template-columns: minmax(280px, 420px) minmax(0, 1fr);
  gap: 20px;
  align-items: stretch;
}

.planner,
.result {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.planner {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-weight: 700;
}

select {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 10px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

.result {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.result strong {
  display: block;
  margin-top: 8px;
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.16;
}

.topic-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.topic-list article {
  min-height: 240px;
  padding: 22px;
  border-left: 5px solid var(--forest);
  border-radius: 8px;
  background: var(--surface);
}

.template-section {
  background: #f7efe9;
}

.template-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.template-grid article {
  min-height: 250px;
  padding: 24px;
  border: 1px solid rgba(201, 98, 75, 0.25);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(217, 173, 95, 0.18), rgba(255, 255, 255, 0.86)),
    var(--surface);
}

.template-grid span {
  color: var(--coral);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.template-grid h3 {
  margin: 12px 0 8px;
  font-size: 24px;
  line-height: 1.24;
}

.template-grid p {
  color: var(--muted);
}

.quality {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 32px;
  background: var(--ink);
  color: #fff;
}

.quality ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.quality li {
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.82);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px clamp(18px, 5vw, 72px);
  border-top: 1px solid var(--line);
  background: var(--surface);
}

@media (max-width: 920px) {
  .site-header,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .tool-layout,
  .quality {
    grid-template-columns: 1fr;
  }

  .metrics,
  .category-grid,
  .topic-list,
  .template-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 86px;
  }

  .metrics {
    transform: none;
    margin-top: 18px;
  }
}

@media (max-width: 560px) {
  .site-header {
    position: static;
  }

  nav {
    width: 100%;
    justify-content: space-between;
  }

  h1 {
    font-size: 40px;
  }

  .section {
    padding-top: 48px;
    padding-bottom: 48px;
  }

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