: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(1140px, 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: 1.02rem;
}

.notice-box ul {
  margin: 0;
  padding-left: 1.2rem;
}

.notice-box li {
  font-size: 0.98rem;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(350px, 0.96fr);
  gap: 20px;
  margin-top: 20px;
  align-items: start;
}

.panel {
  padding: 22px;
}

.panel-heading {
  margin-bottom: 18px;
}

.panel-heading h2,
.result-section h3,
.subsection-head h3 {
  margin: 0 0 8px;
}

.panel-heading p,
.field-hint,
.guide-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.action-row-top {
  margin-bottom: 18px;
}

.action-button,
.ratio-chip,
.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,
.ratio-chip:hover,
.ratio-chip: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: 0.9rem;
}

.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;
}

.bonus-field,
.ratio-field {
  margin-top: 16px;
}

.bonus-field.is-disabled {
  opacity: 0.68;
}

.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;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.ratio-chip {
  min-width: 78px;
  padding-inline: 16px;
}

.ratio-chip.is-active {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary);
}

.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;
}

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

.summary-card {
  padding: 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #fff;
}

.summary-card span {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
}

.summary-card strong {
  display: block;
  margin-top: 6px;
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  line-height: 1.35;
}

.summary-card.highlight {
  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.highlight strong,
.summary-card.accent strong {
  font-size: clamp(1.35rem, 3vw, 1.8rem);
}

.bonus-card.is-hidden {
  display: none;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

.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 tbody 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 strong {
  display: block;
  margin-bottom: 6px;
}

.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: 920px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .page {
    width: min(100%, calc(100% - 16px));
    padding-top: 16px;
  }

  .hero,
  .panel {
    border-radius: 20px;
  }

  .hero {
    padding: 22px 18px;
  }

  .panel {
    padding: 18px;
  }

  .hero h1 {
    font-size: 1.7rem;
  }

  .field-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .action-row,
  .guide-actions {
    flex-direction: column;
  }

  .action-button,
  .guide-button,
  .ratio-chip {
    width: 100%;
  }
}