/* =============================================
   産前産後休暇 計算ツール — style.css
   Design: Mobile-first, pink/warm theme
   ============================================= */

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

:root {
  --primary: #e0547a;
  --primary-hover: #c9486d;
  --primary-rgb: 224, 84, 122;
  --primary-soft: #fff0f4;
  --postnatal: #f97316;
  --postnatal-soft: #fff7ed;
  --total: #8b5cf6;
  --total-soft: #f5f3ff;
  --bg: #f9f7f4;
  --surface: #ffffff;
  --text: #1a1a2e;
  --muted: #6b7280;
  --border: #e5e7eb;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.12), 0 2px 6px rgba(0, 0, 0, 0.06);
  --transition: 0.15s ease;
}

body {
  font-family: 'Outfit', 'BIZ UDPGothic', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 {
  letter-spacing: -0.02em;
}

/* ===== Header ===== */
header {
  background: linear-gradient(135deg, #b5274d 0%, #e0547a 60%, #f08098 100%);
  color: white;
  padding: 2.25rem 1.25rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 70%, rgba(255, 255, 255, 0.08) 0%, transparent 55%),
    radial-gradient(ellipse at 80% 15%, rgba(255, 255, 255, 0.06) 0%, transparent 50%);
  pointer-events: none;
}

.header-inner {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
}

.header-icon {
  font-size: 2.25rem;
  margin-bottom: 0.5rem;
  line-height: 1;
  opacity: 0.95;
}

header h1 {
  font-size: clamp(1.35rem, 5vw, 1.85rem);
  font-weight: 800;
}

.header-sub {
  margin-top: 0.4rem;
  font-size: 0.875rem;
  opacity: 0.88;
}

/* ===== Main ===== */
main {
  max-width: 680px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

/* ===== Card ===== */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  border: 1px solid rgba(0, 0, 0, 0.04);
  margin-bottom: 1rem;
}

/* ===== Section title ===== */
.section-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.section-title .bi {
  color: var(--primary);
}

/* ===== Form ===== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.form-label .bi {
  color: var(--primary);
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  min-height: 44px;
  cursor: pointer;
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.18);
}

/* ===== Toggle switch ===== */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  background: var(--primary-soft);
  border-radius: 10px;
  margin-bottom: 1.25rem;
}

.toggle-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  cursor: pointer;
  flex: 1;
}

.toggle-label .bi {
  display: inline;
  color: var(--primary);
  margin-right: 0.25rem;
}

.toggle-note {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--muted);
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 52px;
  height: 28px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: #d1d5db;
  border-radius: 28px;
  transition: background var(--transition);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  left: 4px;
  bottom: 4px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--transition);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--primary);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(24px);
}

.toggle-switch:focus-within .toggle-slider {
  box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.25);
}

/* ===== Calculate button ===== */
.btn-calc {
  width: 100%;
  padding: 0.875rem 1.5rem;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 52px;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 2px 8px rgba(var(--primary-rgb), 0.35);
}

.btn-calc:hover {
  background: var(--primary-hover);
  box-shadow: 0 4px 14px rgba(var(--primary-rgb), 0.45);
  transform: translateY(-1px);
}

.btn-calc:active {
  transform: translateY(0);
  box-shadow: 0 1px 4px rgba(var(--primary-rgb), 0.3);
}

/* ===== Results area ===== */
.results-area {
  margin-top: 0;
}

/* ===== Result cards ===== */
.result-card {
  transition: box-shadow var(--transition), transform var(--transition);
}

.result-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.result-card-header {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  margin-bottom: 1.125rem;
  padding-bottom: 0.875rem;
  border-bottom: 1.5px solid var(--border);
}

.result-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.prenatal-icon {
  background: var(--primary-soft);
  color: var(--primary);
}

.postnatal-icon {
  background: var(--postnatal-soft);
  color: var(--postnatal);
}

.total-icon {
  background: var(--total-soft);
  color: var(--total);
}

.result-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.result-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.1rem 0.6rem;
  border-radius: 100px;
  background: var(--primary-soft);
  color: var(--primary);
}

.postnatal-badge {
  background: var(--postnatal-soft);
  color: var(--postnatal);
}

.total-badge {
  background: var(--total-soft);
  color: var(--total);
}

.result-rows {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  margin-bottom: 0.875rem;
}

.result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.result-row-label {
  font-size: 0.8125rem;
  color: var(--muted);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  white-space: nowrap;
}

.result-row-label .bi {
  font-size: 0.75rem;
}

.result-row-value {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
  text-align: right;
}

.result-row-value.highlight {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
}

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

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

.result-note {
  font-size: 0.775rem;
  color: var(--muted);
  background: var(--bg);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  display: flex;
  align-items: flex-start;
  gap: 0.35rem;
  line-height: 1.5;
}

.result-note .bi {
  flex-shrink: 0;
  margin-top: 0.15rem;
}

/* ===== Timeline card ===== */
.timeline-card {
  overflow: hidden;
}

.timeline-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1.125rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.timeline-title .bi {
  color: var(--muted);
}

.timeline-wrapper {
  position: relative;
}

.tl-bar {
  display: flex;
  align-items: stretch;
  height: 44px;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 0.625rem;
}

.tl-prenatal {
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  position: relative;
  transition: flex var(--transition);
}

.tl-postnatal {
  background: var(--postnatal);
  flex: 56;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
}

.tl-birth {
  width: 28px;
  flex-shrink: 0;
  background: #1a1a2e;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fbbf24;
  font-size: 0.75rem;
  z-index: 1;
}

.tl-label-inside {
  font-size: 0.7rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 0 6px;
}

.tl-today-marker {
  position: absolute;
  top: 0;
  height: 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 5;
  pointer-events: none;
}

.tl-today-line {
  width: 2px;
  height: 44px;
  background: #1a1a2e;
  opacity: 0.7;
}

.tl-today-label {
  position: absolute;
  top: -20px;
  font-size: 0.65rem;
  font-weight: 700;
  background: #1a1a2e;
  color: white;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  white-space: nowrap;
}

.tl-dates {
  display: flex;
  justify-content: space-between;
  font-size: 0.725rem;
  color: var(--muted);
  font-weight: 500;
  padding: 0 0;
  margin-top: 0.25rem;
}

.tl-dates span {
  flex: 1;
  text-align: center;
}

.tl-dates span:first-child {
  text-align: left;
}

.tl-dates span:last-child {
  text-align: right;
}

/* ===== Copy button ===== */
.btn-copy {
  width: 100%;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  transition: background var(--transition), color var(--transition), transform var(--transition);
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.btn-copy:hover {
  background: var(--primary-soft);
  transform: translateY(-1px);
}

.btn-copy:active {
  transform: translateY(0);
}

.copy-msg {
  text-align: center;
  font-size: 0.8125rem;
  color: #16a34a;
  font-weight: 600;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}

/* ===== Ad unit ===== */
.ad-unit {
  background: #f3f4f6;
  border-radius: 8px;
  min-height: 90px;
  margin-bottom: 1rem;
  overflow: hidden;
}

/* ===== How-to section ===== */
.howto-section {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  border: 1px solid rgba(0, 0, 0, 0.04);
  margin-top: 1rem;
}

.howto-section h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--primary-soft);
}

.howto-section h2:first-child {
  margin-top: 0;
}

.howto-section p {
  font-size: 0.875rem;
  color: #374151;
  line-height: 1.8;
  margin-bottom: 0.75rem;
}

.howto-steps {
  padding-left: 1.25rem;
  font-size: 0.875rem;
  color: #374151;
  line-height: 1.9;
}

.howto-steps li {
  margin-bottom: 0.25rem;
}

/* ===== Rule table ===== */
.rule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
  margin-bottom: 0.5rem;
}

.rule-table th,
.rule-table td {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
  line-height: 1.6;
}

.rule-table thead tr {
  background: var(--primary-soft);
}

.rule-table th {
  font-weight: 700;
  color: var(--primary);
  font-size: 0.75rem;
}

.rule-table tbody tr:nth-child(even) {
  background: #fafafa;
}

/* ===== Notes list ===== */
.notes-list {
  padding-left: 1.25rem;
  font-size: 0.8375rem;
  color: #374151;
  line-height: 1.9;
}

.notes-list li {
  margin-bottom: 0.25rem;
}

/* ===== Benefits list ===== */
.benefits-list {
  font-size: 0.8375rem;
  color: #374151;
}

.benefits-list dt {
  font-weight: 700;
  color: var(--text);
  margin-top: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.benefits-list dt .bi {
  color: var(--primary);
}

.benefits-list dt:first-child {
  margin-top: 0;
}

.benefits-list dd {
  margin-left: 1.25rem;
  margin-top: 0.2rem;
  line-height: 1.75;
  color: #4b5563;
}

/* ===== Actual date input (secondary) ===== */
.actual-input-hint {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

/* ===== Diff card ===== */
.diff-card {
  border-left: 4px solid #0f766e;
}

.diff-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.875rem;
  border-bottom: 1.5px solid var(--border);
}

.diff-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: #f0fdfa;
  color: #0f766e;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.diff-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.diff-summary-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.2rem 0.75rem;
  border-radius: 100px;
  background: #f0fdfa;
  color: #0f766e;
}

.diff-summary-pill.early { background: #fef3c7; color: #92400e; }
.diff-summary-pill.late  { background: #fee2e2; color: #991b1b; }
.diff-summary-pill.same  { background: #f0fdf4; color: #166534; }

.diff-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
  margin-bottom: 0.75rem;
}

.diff-table th {
  padding: 0.5rem 0.625rem;
  text-align: left;
  font-weight: 700;
  font-size: 0.72rem;
  color: var(--muted);
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}

.diff-table td {
  padding: 0.55rem 0.625rem;
  border-bottom: 1px solid #f3f4f6;
  vertical-align: middle;
  line-height: 1.5;
}

.diff-table tr:last-child td { border-bottom: none; }

.diff-table .row-label {
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.diff-table .col-due   { color: var(--primary); }
.diff-table .col-actual { color: #0f766e; }

.delta-pill {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.1rem 0.5rem;
  border-radius: 100px;
  white-space: nowrap;
}

.delta-pill.neg  { background: #fef3c7; color: #92400e; }
.delta-pill.pos  { background: #fee2e2; color: #991b1b; }
.delta-pill.zero { background: #f0fdf4; color: #166534; }

/* ===== Dual timeline (due vs actual) ===== */
.tl-rows {
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
}

.tl-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.tl-row-label {
  font-size: 0.65rem;
  font-weight: 700;
  width: 28px;
  flex-shrink: 0;
  color: var(--muted);
  text-align: right;
}

.tl-row-bar {
  display: flex;
  align-items: stretch;
  height: 36px;
  border-radius: 6px;
  overflow: hidden;
  flex: 1;
  position: relative;
}

/* actual row slightly translucent */
.tl-row--actual .tl-prenatal { opacity: 0.75; }
.tl-row--actual .tl-postnatal { opacity: 0.75; }

.tl-birth-actual {
  width: 28px;
  flex-shrink: 0;
  background: #0f766e;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.7rem;
  z-index: 1;
}

.tl-legend {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.625rem;
  font-size: 0.72rem;
  color: var(--muted);
}

.tl-legend-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.tl-legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  flex-shrink: 0;
}

/* ===== Footer ===== */
footer {
  text-align: center;
  padding: 2.5rem 1.25rem;
  font-size: 0.85rem;
  color: #9ca3af;
  border-top: 1px solid var(--border);
}

footer a {
  color: #6b7280;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

footer a:hover {
  text-decoration: underline;
  color: var(--primary);
}

footer p + p {
  margin-top: 0.5rem;
}

/* ===== Responsive ===== */
@media (min-width: 640px) {
  main {
    padding: 2rem 1.25rem 3.5rem;
  }

  .card {
    padding: 1.75rem;
  }

  .howto-section {
    padding: 1.75rem;
  }
}

@media (max-width: 480px) {
  .result-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
  }

  .result-row-value {
    text-align: left;
  }

  .tl-label-inside {
    font-size: 0.6rem;
    padding: 0 3px;
  }

  .rule-table th,
  .rule-table td {
    padding: 0.4rem 0.5rem;
    font-size: 0.75rem;
  }
}