:root {
  --main: #008080;
  --main-dark: #0f5e63;
  --bg: #f4f7f8;
  --card: #ffffff;
  --text: #24323d;
  --muted: #5b6b76;
  --border: #d8e1e5;
  --soft: #e9f6f5;
  --warn-bg: #fff8e8;
  --warn-border: #e7c56b;
  --warn-text: #7a5a00;
  --shadow: 0 12px 28px rgba(21, 45, 54, 0.08);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(0, 128, 128, 0.08), transparent 28%),
    linear-gradient(180deg, #f8fbfc 0%, #eef3f5 100%);
  line-height: 1.7;
}

.page {
  width: min(1080px, calc(100% - 24px));
  margin: 0 auto;
  padding: 20px 0 40px;
}

.back-link {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--main);
  font-weight: 700;
  text-decoration: none;
}

.back-link:hover,
.back-link:focus-visible {
  text-decoration: underline;
}

.card {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero {
  padding: 24px;
}

.eyebrow {
  display: inline-flex;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--soft);
  color: var(--main-dark);
  font-size: 0.82rem;
  font-weight: 700;
}

h1 {
  margin: 14px 0 10px;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  line-height: 1.3;
}

.hero-text {
  margin: 0;
  color: var(--muted);
}

.hero-points {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.mini-note {
  padding: 12px 14px;
  border-radius: 14px;
  background: #f7fbfb;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.93rem;
}

.mini-note.strong {
  background: #eef8f7;
  color: var(--main-dark);
  border-color: #b8d9d6;
  font-weight: 700;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
  margin-top: 18px;
}

.form-card,
.result-card {
  padding: 22px;
}

.section-head h2 {
  margin: 0;
  font-size: 1.12rem;
}

.section-head p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field.full {
  grid-column: 1 / -1;
}

label {
  font-weight: 700;
  font-size: 0.95rem;
}

select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid #c7d4d9;
  border-radius: 14px;
  background: #fff;
  color: var(--text);
  font: inherit;
}

select:focus {
  outline: 3px solid rgba(0, 128, 128, 0.15);
  border-color: var(--main);
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.83rem;
}

.inline-alert {
  margin-top: 18px;
  padding: 13px 14px;
  border-radius: 14px;
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  color: var(--warn-text);
  font-size: 0.9rem;
}

.primary-button {
  margin-top: 18px;
  width: 100%;
  padding: 15px 18px;
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--main), #0b6770);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.primary-button:hover,
.primary-button:focus-visible {
  opacity: 0.96;
}

.result-stack {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.result-box {
  padding: 16px;
  border-radius: 16px;
  background: #f9fbfc;
  border: 1px solid var(--border);
}

.result-box.accent {
  background: linear-gradient(135deg, #edf8f8, #f7fcfb);
  border-color: #c6dddb;
}

.insurance-box {
  background: #f8fbfd;
}

.caution-box {
  background: #fffdf7;
}

.result-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.result-box strong {
  display: block;
  font-size: 1.18rem;
  line-height: 1.5;
}

.result-text {
  margin: 0;
}

.checklist,
.notice-list {
  margin: 0;
  padding-left: 18px;
}

@media (max-width: 880px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .page {
    width: min(100% - 14px, 1080px);
    padding: 14px 0 28px;
  }

  .hero,
  .form-card,
  .result-card {
    padding: 18px;
  }

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

  select,
  .primary-button {
    font-size: 16px;
  }

  .primary-button {
    position: sticky;
    bottom: 10px;
  }
}