/* =============================================
   国民健康保険料 計算ツール
   Design: Blue系
   ============================================= */

:root {
  --primary: #1d4ed8;
  --primary-hover: #1e40af;
  --primary-light: #eff6ff;
  --accent: #3b82f6;
  --bg: #f8faff;
  --surface: #ffffff;
  --text: #1a1a2e;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.08);
  --transition: 0.15s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'BIZ UDPGothic', 'Outfit', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 1rem;
}

/* Header */
header {
  background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 100%);
  color: #fff; padding: 2.5rem 1rem 2rem; text-align: center;
}
.header-inner { max-width: 760px; margin: 0 auto; }
.header-badge {
  display: inline-flex; align-items: center; gap: 0.3rem;
  background: rgba(255,255,255,0.2); border-radius: 20px;
  padding: 0.25rem 0.75rem; font-size: 0.8rem; margin-bottom: 0.75rem;
}
h1 { font-family: 'Outfit', sans-serif; font-size: clamp(1.4rem, 4vw, 2rem); font-weight: 800; line-height: 1.2; }
.subtitle { margin-top: 0.5rem; font-size: 0.9rem; opacity: 0.9; }

/* Main */
main { max-width: 760px; margin: 0 auto; padding: 1.5rem 1rem 3rem; }

/* Ad unit */
.ad-unit { min-height: 0; margin: 1rem 0; }

/* Privacy notice */
.privacy-notice {
  background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: var(--radius-sm);
  padding: 0.6rem 1rem; font-size: 0.85rem; color: #166534;
  display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1.25rem;
}

/* Card */
.card {
  background: var(--surface); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1.5rem; margin-bottom: 1.25rem;
}
.tool-section h2, .result-section h2, section h2 {
  font-family: 'Outfit', sans-serif; font-size: 1.1rem; font-weight: 700;
  margin-bottom: 1.25rem; display: flex; align-items: center; gap: 0.4rem;
}

/* Form grid */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1.25rem; }
@media (max-width: 500px) { .form-grid { grid-template-columns: 1fr; } }

.field { display: flex; flex-direction: column; gap: 0.3rem; }
.field-label { font-size: 0.85rem; font-weight: 700; color: var(--text); }
.required { background: #ef4444; color: #fff; font-size: 0.7rem; padding: 0.1rem 0.35rem; border-radius: 4px; margin-left: 0.3rem; }
.field-hint { font-size: 0.78rem; color: var(--text-muted); }
.input-wrapper { display: flex; align-items: center; gap: 0.5rem; }
.input-wrapper input, select {
  flex: 1; border: 2px solid var(--border); border-radius: var(--radius-sm);
  padding: 0.55rem 0.75rem; font-size: 1rem; color: var(--text); background: #fff;
  transition: border-color var(--transition);
}
.input-wrapper input:focus, select:focus { outline: none; border-color: var(--accent); }
.input-suffix { font-size: 0.85rem; color: var(--text-muted); white-space: nowrap; }

/* Primary button */
.btn-primary {
  display: flex; align-items: center; justify-content: center; gap: 0.5rem;
  width: 100%; background: linear-gradient(135deg, #1d4ed8, #2563eb);
  color: #fff; border: none; border-radius: var(--radius);
  padding: 1rem; font-size: 1.1rem; font-weight: 800;
  cursor: pointer; transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 14px rgba(29,78,216,0.35);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(29,78,216,0.4); }
.btn-primary:active { transform: translateY(0); }

/* Result main grid */
.result-main-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1.25rem; }
@media (max-width: 480px) { .result-main-grid { grid-template-columns: 1fr; } }
.result-main-card {
  background: var(--surface); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1.25rem; text-align: center;
  border-top: 3px solid var(--accent);
}
.result-monthly { border-top-color: var(--primary); }
.result-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.25rem; }
.result-value { font-family: 'Outfit', sans-serif; font-size: 1.9rem; font-weight: 800; color: var(--primary); }
.result-value.monthly { color: #1e40af; }
.result-unit { font-size: 0.72rem; color: var(--text-muted); }

/* Reduction badge */
.reduction-badge {
  background: #fef9c3; border: 1px solid #fde047; border-radius: var(--radius-sm);
  padding: 0.6rem 1rem; font-size: 0.875rem; color: #854d0e;
  display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1.25rem;
}

/* Breakdown card */
.breakdown-card { margin-bottom: 1.25rem; }
.breakdown-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 1rem; display: flex; align-items: center; gap: 0.4rem; }
.breakdown-grid { display: grid; grid-template-columns: 180px 1fr; gap: 1.5rem; align-items: center; }
@media (max-width: 500px) { .breakdown-grid { grid-template-columns: 1fr; } }
.chart-wrapper { position: relative; height: 180px; }
.breakdown-table { display: flex; flex-direction: column; gap: 0.5rem; }
.breakdown-row { display: flex; justify-content: space-between; align-items: center; padding: 0.4rem 0; border-bottom: 1px solid var(--border); }
.breakdown-row:last-child { border-bottom: none; }
.breakdown-total { font-weight: 700; color: var(--primary); }
.breakdown-label { display: flex; align-items: center; gap: 0.4rem; font-size: 0.875rem; }
.breakdown-amount { font-weight: 700; font-size: 0.9rem; }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot-medical { background: #3b82f6; }
.dot-support  { background: #f59e0b; }
.dot-care     { background: #10b981; }

/* Comparison card */
.comparison-card { margin-bottom: 1.25rem; }
.comparison-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.4rem; }
.comparison-desc { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1rem; }
.comparison-field { margin-bottom: 1rem; }
.comparison-table { display: flex; flex-direction: column; gap: 0.25rem; }
.comp-row { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 0.5rem; padding: 0.5rem; border-radius: 6px; font-size: 0.875rem; }
.comp-header { font-size: 0.78rem; color: var(--text-muted); font-weight: 700; }
.comp-row:nth-child(2) { background: #eff6ff; }
.comp-row:nth-child(3) { background: #fffbeb; }
.comp-label { display: flex; align-items: center; gap: 0.4rem; font-weight: 600; }
.comp-winner { text-align: center; padding: 0.5rem; border-radius: 6px; font-weight: 700; font-size: 0.875rem; margin-top: 0.5rem; background: var(--primary-light); }

/* Disclaimer */
.disclaimer { font-size: 0.78rem; color: var(--text-muted); padding: 0.75rem; background: #f9fafb; border-radius: var(--radius-sm); display: flex; align-items: flex-start; gap: 0.4rem; line-height: 1.5; margin-top: 1rem; }

/* Howto section */
.howto-section { }
.howto-section h2, .faq-section h2 { font-family: 'Outfit', sans-serif; font-size: 1.05rem; font-weight: 700; margin-bottom: 1rem; display: flex; align-items: center; gap: 0.4rem; }
.accordion-list, .faq-list { display: flex; flex-direction: column; gap: 0.5rem; }
.accordion-item, .faq-item { border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.accordion-btn {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 0.85rem 1rem; background: #fff; border: none; cursor: pointer;
  font-size: 0.9rem; font-weight: 700; color: var(--text); text-align: left;
}
.accordion-btn:hover { background: var(--primary-light); }
.acc-icon { color: var(--text-muted); transition: transform 0.2s; flex-shrink: 0; }
.accordion-btn[aria-expanded="true"] .acc-icon { transform: rotate(180deg); }
.accordion-body { display: none; padding: 0.75rem 1rem; font-size: 0.875rem; line-height: 1.7; color: var(--text); border-top: 1px solid var(--border); }
.step-num { background: var(--primary); color: #fff; border-radius: 50%; width: 22px; height: 22px; display: inline-flex; align-items: center; justify-content: center; font-size: 0.75rem; font-weight: 700; flex-shrink: 0; }
.info-box { background: var(--primary-light); border-left: 4px solid var(--accent); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 1rem; margin-top: 1rem; }
.info-box h3 { font-size: 0.9rem; font-weight: 700; margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.4rem; }
.info-box p { font-size: 0.85rem; line-height: 1.7; }

/* FAQ section */
.faq-section { }

/* Footer */
footer { background: #1e1e2e; color: #aaa; text-align: center; padding: 2rem 1rem; font-size: 0.8rem; }
footer a { color: #3b82f6; text-decoration: none; }
footer nav { display: flex; justify-content: center; flex-wrap: wrap; gap: 1rem; margin-bottom: 0.75rem; }