:root {
  --yk-ink: #263326;
  --yk-muted: #66705f;
  --yk-paper: #fbfaf4;
  --yk-field: #eef3df;
  --yk-line: #d8ddc9;
  --yk-leaf: #496b35;
  --yk-earth: #8b6849;
  --yk-tomato: #bd4f38;
  --yk-shadow: 0 18px 60px rgba(38, 51, 38, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--yk-ink);
  background: var(--yk-paper);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, system-ui, sans-serif;
  line-height: 1.75;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

.yk-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 22px 0;
}

.yk-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--yk-ink);
  font-weight: 700;
  text-decoration: none;
}

.yk-mark__leaf {
  width: 18px;
  height: 18px;
  border-radius: 70% 8px 70% 8px;
  background: linear-gradient(135deg, var(--yk-leaf), #86a55f);
  transform: rotate(-20deg);
}

.yk-nav {
  display: flex;
  gap: 22px;
  color: var(--yk-muted);
  font-size: 0.95rem;
}

.yk-nav a {
  text-decoration: none;
}

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

.yk-hero {
  display: grid;
  grid-template-columns: minmax(320px, 0.86fr) minmax(520px, 1.14fr);
  align-items: center;
  gap: 34px;
  width: min(1180px, calc(100% - 48px));
  margin: 12px auto 80px;
}

.yk-hero__copy {
  padding: 44px 0;
}

.yk-kicker {
  margin: 0 0 10px;
  color: var(--yk-earth);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0;
}

.yk-hero h1 {
  margin: 0;
  max-width: 12em;
  font-size: clamp(2.5rem, 5vw, 4.8rem);
  line-height: 1.12;
  letter-spacing: 0;
}

.yk-lead {
  max-width: 34em;
  margin: 24px 0 30px;
  color: var(--yk-muted);
  font-size: 1.08rem;
}

.yk-primary-link,
.yk-secondary-link {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 12px 22px;
  border-radius: 6px;
  background: var(--yk-leaf);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.yk-secondary-link {
  background: var(--yk-earth);
}

.yk-hero__media {
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--yk-shadow);
}

.yk-hero__media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.yk-season-strip,
.yk-calendar-panel,
.yk-easy-crops,
.yk-morning {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto 76px;
}

.yk-section-note {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 22px;
}

.yk-section-note h2,
.yk-calendar-head h2,
.yk-easy-crops h2,
.yk-morning h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  line-height: 1.24;
  letter-spacing: 0;
}

.yk-season-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.yk-season-card {
  min-height: 245px;
  padding: 24px;
  border: 1px solid var(--yk-line);
  border-radius: 8px;
  background: #fffef9;
}

.yk-season-card span {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 999px;
  background: var(--yk-field);
  color: var(--yk-leaf);
  font-weight: 700;
}

.yk-season-card h3 {
  margin: 20px 0 10px;
  font-size: 1.25rem;
}

.yk-season-card p {
  margin: 0;
  color: var(--yk-muted);
}

.yk-calendar-panel {
  padding: 38px;
  border-radius: 8px;
  background: #f3f0e4;
}

.yk-calendar-head {
  max-width: 760px;
  margin-bottom: 26px;
}

.yk-calendar-head p:last-child {
  margin: 14px 0 0;
  color: var(--yk-muted);
}

.yk-table-wrap {
  overflow-x: auto;
}

.yk-month-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  background: #fffef9;
  border: 1px solid var(--yk-line);
}

.yk-month-table th,
.yk-month-table td {
  padding: 18px 20px;
  border-bottom: 1px solid var(--yk-line);
  text-align: left;
  vertical-align: top;
}

.yk-month-table thead th {
  background: var(--yk-leaf);
  color: #fff;
}

.yk-month-table tbody th {
  color: var(--yk-earth);
  width: 150px;
}

.yk-crop-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.yk-crop-row article {
  padding: 26px;
  border-left: 6px solid var(--yk-tomato);
  background: #fffef9;
  box-shadow: 0 10px 34px rgba(38, 51, 38, 0.08);
}

.yk-crop-row h3 {
  margin: 0 0 10px;
  font-size: 1.3rem;
}

.yk-crop-row p {
  margin: 0;
  color: var(--yk-muted);
}

.yk-morning {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 22px;
  align-items: stretch;
}

.yk-morning__card,
.yk-morning__aside {
  border-radius: 8px;
  padding: 34px;
}

.yk-morning__card {
  background: var(--yk-field);
}

.yk-morning__card ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 20px;
  margin: 24px 0 28px;
  padding-left: 1.3em;
}

.yk-morning__aside {
  background: #fffef9;
  border: 1px solid var(--yk-line);
}

.yk-morning__aside h3 {
  margin: 0 0 12px;
}

.yk-morning__aside p {
  margin: 0;
  color: var(--yk-muted);
}

.yk-footer {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 36px 0 46px;
  border-top: 1px solid var(--yk-line);
  color: var(--yk-muted);
}

.yk-footer p {
  margin: 0;
}

.yk-footer p:first-child {
  color: var(--yk-ink);
  font-weight: 700;
}

.yk-footer a {
  color: var(--yk-leaf);
  font-weight: 700;
}

.yk-policy {
  width: min(860px, calc(100% - 48px));
  margin: 34px auto 80px;
  padding: 42px;
  border: 1px solid var(--yk-line);
  border-radius: 8px;
  background: #fffef9;
}

.yk-policy h1 {
  margin: 0 0 22px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.2;
}

.yk-policy h2 {
  margin: 30px 0 8px;
  font-size: 1.35rem;
}

.yk-policy p {
  color: var(--yk-muted);
}

.yk-policy__back {
  display: inline-flex;
  margin-top: 22px;
  color: var(--yk-leaf);
  font-weight: 700;
}

@media (max-width: 900px) {
  .yk-topbar,
  .yk-section-note {
    align-items: flex-start;
    flex-direction: column;
  }

  .yk-hero,
  .yk-morning {
    grid-template-columns: 1fr;
  }

  .yk-season-grid,
  .yk-crop-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .yk-topbar,
  .yk-hero,
  .yk-season-strip,
  .yk-calendar-panel,
  .yk-easy-crops,
  .yk-morning,
  .yk-footer {
    width: min(100% - 28px, 1180px);
  }

  .yk-policy {
    width: min(100% - 28px, 860px);
    padding: 24px;
  }

  .yk-nav {
    flex-wrap: wrap;
    gap: 12px 18px;
  }

  .yk-hero {
    margin-bottom: 54px;
  }

  .yk-hero__copy {
    padding: 18px 0 0;
  }

  .yk-season-grid,
  .yk-crop-row,
  .yk-morning__card ul {
    grid-template-columns: 1fr;
  }

  .yk-calendar-panel,
  .yk-morning__card,
  .yk-morning__aside {
    padding: 24px;
  }
}