:root {
  --bg: #f4f7f8;
  --panel: #ffffff;
  --line: #d7e0e4;
  --line-strong: #b7c6cc;
  --text: #1f2d35;
  --muted: #5d6b75;
  --primary: #0f766e;
  --primary-soft: #e0f2ef;
  --danger: #a8471b;
  --danger-soft: #fff3eb;
  --dark: #16323f;
  --highlight: #f2f8fb;
  --shadow: 0 12px 28px rgba(31, 45, 53, 0.08);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: linear-gradient(180deg, #eef4f5 0%, #f8fafb 100%);
  color: var(--text);
  font-family: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.7;
}
.page {
  width: min(1160px, calc(100% - 24px));
  margin: 0 auto;
  padding: 20px 0 40px;
}
.back-link {
  display: inline-flex;
  margin-bottom: 16px;
  color: var(--primary);
  text-decoration: none;
  font-weight: 700;
}
.back-link:hover,
.back-link:focus-visible { text-decoration: underline; }
.hero,
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}
.hero { padding: 28px; }
.hero-badge {
  display: inline-flex;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.hero h1 {
  margin: 14px 0 10px;
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  line-height: 1.25;
}
.hero-text { margin: 0; color: var(--muted); }
.notice-box {
  margin-top: 18px;
  padding: 18px 20px;
  border: 1px solid #f0c5a5;
  border-radius: 18px;
  background: linear-gradient(180deg, #fff9f2 0%, #fff5eb 100%);
}
.notice-box strong {
  display: block;
  margin-bottom: 8px;
  color: var(--danger);
  font-size: 1.04rem;
}
.notice-box ul { margin: 0; padding-left: 1.2rem; }
.notice-box li { font-size: 0.98rem; }
.step-panel { margin-top: 20px; padding: 22px; }
.panel-heading { margin-bottom: 18px; }
.panel-heading h2,
.result-section h3,
.subsection-head h3,
.breakdown-head h4 { margin: 0 0 8px; }
.panel-heading p,
.subsection-head p,
.field-hint,
.guide-note,
.toggle-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}
.step-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.step-card {
  display: block;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fbfcfc;
  color: inherit;
  text-decoration: none;
}
.step-card.current {
  border-color: #99d1c8;
  background: linear-gradient(180deg, #ecf8f6 0%, #ffffff 100%);
}
.step-card.link-card:hover,
.step-card.link-card:focus-visible {
  border-color: var(--primary);
  transform: translateY(-1px);
}
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 700;
}
.step-card strong { display: block; margin-top: 12px; font-size: 1rem; }
.step-card p { margin: 8px 0 0; color: var(--muted); font-size: 0.92rem; }
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  gap: 20px;
  margin-top: 20px;
  align-items: start;
}
.panel { padding: 22px; }
.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.action-row-top { margin-bottom: 18px; }
.action-button,
.guide-button {
  appearance: none;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: #fff;
  color: var(--text);
  padding: 12px 18px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
}
.action-button.primary,
.guide-button.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.action-button.dark {
  background: var(--dark);
  border-color: var(--dark);
  color: #fff;
}
.action-button:hover,
.action-button:focus-visible,
.guide-button:hover,
.guide-button:focus-visible { opacity: 0.92; }
.form-message {
  display: none;
  margin-bottom: 16px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid #f0c5a5;
  background: var(--danger-soft);
  color: var(--danger);
  font-size: 0.94rem;
}
.form-message.visible { display: block; }
.subsection {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.subsection:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}
.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}
.field-full { grid-column: 1 / -1; }
.field span:first-child,
.toggle-label {
  font-weight: 700;
  font-size: 0.95rem;
}
.input-wrap {
  display: flex;
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: #fff;
  padding-right: 14px;
  overflow: hidden;
}
.input-wrap:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.14);
}
.input-wrap input {
  width: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  padding: 14px 14px 14px 16px;
  font: inherit;
}
.input-wrap span:last-child {
  color: var(--muted);
  font-size: 0.92rem;
  white-space: nowrap;
}
.toggle-box {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #f8fbfb;
}
.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.radio-group label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 14px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  font-weight: 700;
  cursor: pointer;
}
.radio-group input { margin: 0; }
.bonus-field { margin-top: 16px; }
.bonus-field.is-disabled { opacity: 0.68; }
.result-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.result-section {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}
.result-section:first-of-type {
  border-top: 0;
  padding-top: 0;
}
.highlight-grid,
.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.highlight-grid { margin-bottom: 14px; }
.summary-card {
  padding: 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #fff;
}
.summary-card.major {
  background: linear-gradient(180deg, #ecf8f6 0%, #ffffff 100%);
  border-color: #99d1c8;
}
.summary-card.accent {
  background: linear-gradient(180deg, #f2f8fb 0%, #ffffff 100%);
  border-color: #b9d2de;
}
.summary-card span,
.comparison-metric span {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
}
.summary-card strong,
.comparison-metric strong {
  display: block;
  margin-top: 6px;
  font-size: clamp(1.08rem, 2.4vw, 1.38rem);
  line-height: 1.35;
}
.summary-card.major strong,
.summary-card.accent strong {
  font-size: clamp(1.5rem, 3vw, 2rem);
}
.bonus-card.is-hidden { display: none; }
.comparison-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}
.comparison-metric {
  padding: 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: #fbfcfc;
}
.breakdown-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.breakdown-card {
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #fff;
}
.breakdown-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
  margin-bottom: 10px;
}
.breakdown-head strong { font-size: 1.1rem; }
.cost-list { margin: 0; }
.cost-list div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid #edf1f3;
}
.cost-list dt { color: var(--muted); }
.cost-list dd {
  margin: 0;
  font-weight: 700;
  text-align: right;
}
.cost-list .total-row {
  border-bottom: 0;
  padding-bottom: 0;
}
.cost-list .total-row dt,
.cost-list .total-row dd {
  color: var(--text);
  font-size: 1rem;
}
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}
.compare-table th,
.compare-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}
.compare-table th {
  background: #f6faf9;
  font-size: 0.88rem;
}
.compare-table tr.current { background: var(--highlight); }
.compare-table tbody tr:last-child td { border-bottom: 0; }
.empty-row { text-align: center; color: var(--muted); }
.insight-list {
  display: grid;
  gap: 12px;
}
.insight-card {
  padding: 15px 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: #fff;
}
.insight-card p { margin: 0; color: var(--muted); }
.guide-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.guide-button.secondary { color: var(--primary); }
.guide-note { margin-top: 12px; }
@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .step-grid,
  .highlight-grid,
  .summary-grid,
  .comparison-strip,
  .breakdown-grid,
  .field-grid { grid-template-columns: 1fr; }
  .field-full { grid-column: auto; }
}
@media (max-width: 640px) {
  .page {
    width: min(100%, calc(100% - 16px));
    padding-top: 16px;
  }
  .hero,
  .panel {
    border-radius: 20px;
  }
  .hero,
  .step-panel,
  .panel { padding: 18px; }
  .hero h1 { font-size: 1.72rem; }
  .action-row,
  .guide-actions { flex-direction: column; }
  .action-button,
  .guide-button { width: 100%; }
  .input-wrap input { font-size: 16px; }
}