:root {
  color-scheme: light;
  --color-bg: #f5f7f6;
  --color-surface: #ffffff;
  --color-text: #1f2a24;
  --color-text-muted: #5b6660;
  --color-primary: #2f6f5e;
  --color-primary-dark: #234f42;
  --color-primary-light: #e3f0ec;
  --color-border: #d9e0dc;
  --color-selected-bg: #2f6f5e;
  --color-selected-text: #ffffff;
  --color-caution-bg: #fbf6e8;
  --color-caution-border: #e8dcb0;
  --radius: 14px;
  --gap: 14px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", system-ui, -apple-system, sans-serif;
  -webkit-text-size-adjust: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

body {
  padding-bottom: 48px;
}

.app-header {
  background: var(--color-primary);
  color: #fff;
  padding: 20px 16px 24px;
  text-align: center;
}

.app-header .facility-name {
  font-size: 18px;
  font-weight: 600;
  opacity: 0.9;
  margin: 0 0 2px;
}

.app-header h1 {
  font-size: 26px;
  margin: 0 0 6px;
  line-height: 1.3;
}

.app-header .subtitle {
  font-size: 13px;
  opacity: 0.85;
  margin: 0;
}

main {
  max-width: 640px;
  width: 100%;
  margin: 0 auto;
  padding: 16px;
}

.lead {
  text-align: center;
  font-size: 15px;
  color: var(--color-text-muted);
  margin: 4px 0 20px;
}

.step {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  padding: 16px;
  margin-bottom: 16px;
}

.step-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 12px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-size: 14px;
  flex-shrink: 0;
}

.step-status {
  margin-left: auto;
  font-size: 13px;
  color: var(--color-text-muted);
}

.option-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.option-grid.cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.option-grid.cols-1 {
  grid-template-columns: minmax(0, 1fr);
}

.option-btn {
  appearance: none;
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: 12px;
  padding: 16px 8px;
  font-size: 16px;
  font-weight: 600;
  min-height: 56px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  min-width: 0;
  width: 100%;
}

.option-btn:active {
  transform: scale(0.98);
}

.option-btn[aria-pressed="true"] {
  background: var(--color-selected-bg);
  border-color: var(--color-selected-bg);
  color: var(--color-selected-text);
}

.option-btn.small {
  font-size: 14px;
  min-height: 48px;
}

.option-btn.wide {
  text-align: left;
}

.option-btn.skip-option {
  border-style: dashed;
  color: var(--color-text-muted);
  font-weight: 500;
}

.option-btn.skip-option[aria-pressed="true"] {
  background: var(--color-text-muted);
  border-color: var(--color-text-muted);
  color: #fff;
}

.days-control {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.days-control button {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  background: var(--color-surface);
  color: var(--color-primary);
  font-size: 22px;
  font-weight: 700;
  cursor: pointer;
}

.days-control button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.days-value {
  font-size: 28px;
  font-weight: 700;
  min-width: 90px;
  text-align: center;
}

.days-value .unit {
  font-size: 15px;
  font-weight: 500;
  margin-left: 4px;
}

.toggle-row {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.toggle-row .option-btn {
  flex: 1;
}

.number-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.number-input-row input[type="number"] {
  flex: 1;
  font-size: 18px;
  padding: 12px;
  border-radius: 10px;
  border: 2px solid var(--color-border);
  min-height: 48px;
  width: 100%;
}

.number-input-row .unit {
  font-size: 15px;
  color: var(--color-text-muted);
}

.field-hint {
  font-size: 12px;
  color: var(--color-text-muted);
  margin: 8px 0 0;
}

.calc-button {
  display: block;
  width: 100%;
  padding: 18px;
  font-size: 18px;
  font-weight: 700;
  border-radius: 14px;
  border: none;
  background: var(--color-primary);
  color: #fff;
  cursor: pointer;
  margin-top: 8px;
}

.calc-button:disabled {
  background: #9fb3ac;
  cursor: not-allowed;
}

/* Result panel */
.result-panel {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  padding: 20px 16px;
  margin-bottom: 16px;
}

.result-panel h2 {
  font-size: 15px;
  color: var(--color-text-muted);
  margin: 0 0 4px;
  font-weight: 600;
}

.result-final {
  text-align: center;
  padding: 8px 0 20px;
  border-bottom: 1px dashed var(--color-border);
  margin-bottom: 16px;
}

.result-final .label {
  font-size: 14px;
  color: var(--color-text-muted);
}

.result-final .amount {
  font-size: 40px;
  font-weight: 800;
  color: var(--color-primary-dark);
  line-height: 1.2;
}

.result-final .amount .yen {
  font-size: 22px;
  margin-left: 2px;
}

.result-section {
  margin-bottom: 18px;
}

.result-section h3 {
  font-size: 15px;
  margin: 0 0 8px;
  color: var(--color-primary-dark);
  border-left: 4px solid var(--color-primary);
  padding-left: 8px;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 6px 0;
  font-size: 15px;
}

.result-row .name {
  color: var(--color-text-muted);
}

.result-row .value {
  font-weight: 700;
  font-size: 17px;
}

.result-row.total {
  border-top: 1px solid var(--color-border);
  margin-top: 4px;
  padding-top: 10px;
}

.result-row.highlight .value {
  color: var(--color-primary-dark);
}

.arrow-row {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 14px;
  padding: 2px 0;
}

.reduction-banner {
  background: var(--color-primary-light);
  border-radius: 10px;
  padding: 10px 12px;
  text-align: center;
  font-size: 14px;
  color: var(--color-primary-dark);
  margin-top: 8px;
}

.caution-box {
  background: var(--color-caution-bg);
  border: 1px solid var(--color-caution-border);
  border-radius: 12px;
  padding: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 16px;
}

.result-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.print-button,
.reset-button {
  display: block;
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 12px;
  border: 2px solid var(--color-primary);
  background: #fff;
  color: var(--color-primary);
  cursor: pointer;
}

.print-button {
  background: var(--color-primary);
  color: #fff;
}

.print-only-header {
  display: none;
}

footer.app-footer {
  text-align: center;
  font-size: 12px;
  color: var(--color-text-muted);
  line-height: 1.8;
  padding: 16px;
  white-space: pre-line;
}

[hidden] {
  display: none !important;
}

/* 印刷・PDF保存用のレイアウト調整。
   結果画面(result-panel)以外はすべて非表示にし、白背景・黒文字の書類らしい見た目にする。 */
@media print {
  html,
  body {
    background: #fff;
  }

  .app-header,
  .lead,
  .step,
  .calc-button,
  .print-button,
  .reset-button,
  footer.app-footer {
    display: none !important;
  }

  main {
    max-width: none;
    padding: 0;
  }

  .result-panel {
    border: none;
    padding: 0;
  }

  .print-only-header {
    display: block;
    text-align: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid #000;
  }

  .print-facility-name {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 4px;
  }

  .print-date {
    font-size: 12px;
    color: #333;
    margin: 0;
  }

  .result-final {
    border-bottom: 1px solid #999;
  }

  .result-final .amount {
    color: #000;
  }

  .result-section h3 {
    color: #000;
    border-left-color: #000;
  }

  .result-row.highlight .value,
  .result-row .value {
    color: #000;
  }

  .reduction-banner {
    background: #fff;
    border: 1px solid #999;
  }

  .caution-box {
    background: #fff;
    border: 1px solid #999;
  }
}