:root {
  --cream: #fff7e8;
  --paper: #fffdf8;
  --ink: #2b4159;
  --red: #e05563;
  --green: #3aa176;
  --soft-green: #e6f3d5;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--cream);
  font-family: "Hiragino Maru Gothic ProN", "Hiragino Sans", "Yu Gothic", "Noto Sans JP", system-ui, sans-serif;
  font-weight: 500;
  line-height: 1.9;
}

.shell {
  width: min(100%, 860px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 44px 22px 72px;
}

.back {
  color: var(--ink);
  font-weight: 700;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.paper {
  margin-top: 26px;
  padding: clamp(25px, 6vw, 58px);
  border-radius: 30px;
  background: var(--paper);
  box-shadow: 0 12px 30px rgba(43, 65, 89, 0.10);
}

.kicker {
  margin: 0 0 8px;
  color: var(--green);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(30px, 6vw, 46px);
  font-weight: 700;
}

.date {
  margin: 0 0 36px;
  color: rgba(43, 65, 89, 0.68);
  font-size: 14px;
}

section {
  margin-top: 30px;
}

h2 {
  margin: 0 0 9px;
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 700;
}

.note {
  margin-top: 38px;
  padding: 18px 20px;
  border-radius: 18px;
  background: var(--soft-green);
}

.pill-link {
  display: inline-block;
  margin-top: 26px;
  color: var(--ink);
  font-weight: 700;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.landing {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}

.landing-card {
  width: min(100%, 560px);
  padding: clamp(32px, 6vw, 56px);
  border-radius: 30px;
  background: var(--paper);
  box-shadow: 0 14px 34px rgba(43, 65, 89, 0.12);
  text-align: center;
}

.mark {
  display: grid;
  width: 76px;
  height: 76px;
  margin: 0 auto 18px;
  place-items: center;
  border-radius: 24px;
  color: var(--paper);
  background: var(--red);
  box-shadow: 0 6px 14px rgba(43, 65, 89, 0.18);
  font-size: 44px;
  font-weight: 700;
  transform: rotate(-3deg);
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 26px;
}

.links a {
  padding: 12px 22px;
  border-radius: 999px;
  color: var(--ink);
  background: var(--soft-green);
  box-shadow: 0 2px 8px rgba(43, 65, 89, 0.08);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.links a:first-child {
  background: #e3eefb;
}