:root {
  --color-bg: #f5f7f6;
  --color-surface: #ffffff;
  --color-text: #1f2a2a;
  --color-muted: #5f6b6b;
  --color-border: #d8e0df;
  --color-primary: #2a6f6f;
  --color-primary-dark: #1d5252;
  --color-accent: #c76b2c;
  --color-accent-dark: #a3551f;
  --color-danger: #b3352c;
  --color-warning-bg: #fff4e5;
  --color-warning-text: #8a5a00;
  font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", -apple-system, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

.save-banner {
  background: var(--color-warning-bg);
  color: var(--color-warning-text);
  padding: 8px 16px;
  text-align: center;
  font-size: 0.9rem;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--color-primary);
  color: #fff;
}

.app-title {
  font-size: 1.3rem;
  font-weight: bold;
}

.app-tagline {
  display: block;
  font-size: 0.75rem;
  font-weight: normal;
  opacity: 0.85;
}

.pro-status { display: flex; align-items: center; gap: 10px; }

.pro-badge {
  background: var(--color-accent);
  color: #fff;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: bold;
}

.tabs {
  display: flex;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
}

.tab-btn {
  flex: 1 0 auto;
  padding: 12px 16px;
  border: none;
  background: none;
  font-size: 0.95rem;
  cursor: pointer;
  color: var(--color-muted);
  border-bottom: 3px solid transparent;
}

.tab-btn[aria-selected="true"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: bold;
}

main { padding: 16px; max-width: 1200px; margin: 0 auto; }

.view[hidden] { display: none; }

.create-layout {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.form-pane {
  flex: 1 1 40%;
  min-width: 320px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.preview-pane {
  flex: 1 1 60%;
  min-width: 320px;
  position: sticky;
  top: 16px;
}

@media (max-width: 900px) {
  .create-layout { flex-direction: column; }
  .preview-pane { position: static; width: 100%; }
}

.field-group {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field-group legend {
  font-weight: bold;
  padding: 0 4px;
  color: var(--color-primary-dark);
}

label { font-size: 0.85rem; color: var(--color-muted); }

input[type="text"], input[type="number"], input[type="date"],
input[type="email"], input[type="search"], input[type="file"],
select, textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.95rem;
  font-family: inherit;
  background: #fff;
  color: var(--color-text);
}

.field-invalid { border-color: var(--color-danger) !important; background: #fff5f4; }

.inline-check { display: flex; align-items: center; gap: 6px; font-size: 0.95rem; color: var(--color-text); }
.radio-row { display: flex; gap: 16px; font-size: 0.9rem; color: var(--color-text); }
.radio-row label { display: flex; align-items: center; gap: 4px; color: var(--color-text); }

.btn {
  padding: 9px 16px;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-text);
  cursor: pointer;
  font-size: 0.9rem;
}
.btn:hover { background: #eef2f1; }
.btn-primary { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-accent { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.btn-accent:hover { background: var(--color-accent-dark); }
.btn-danger { background: #fff; color: var(--color-danger); border-color: var(--color-danger); }
.btn-danger:hover { background: #fbeceb; }
.btn-small { padding: 5px 10px; font-size: 0.8rem; }
.btn-tiny { padding: 2px 7px; font-size: 0.8rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

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

.items-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.items-table th { text-align: left; font-size: 0.8rem; color: var(--color-muted); padding: 4px 4px; }
.items-table td { padding: 3px 4px; }
.item-controls { white-space: nowrap; }

.warning-text { color: var(--color-warning-text); background: var(--color-warning-bg); padding: 6px 10px; border-radius: 6px; font-size: 0.85rem; }

.count-text { font-size: 0.85rem; color: var(--color-muted); }
.view-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; gap: 10px; }

.card-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px; }
.card-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.card-item .card-main { flex: 1 1 auto; }
.card-item .card-title { font-weight: bold; }
.card-item .card-sub { font-size: 0.82rem; color: var(--color-muted); }
.card-item .card-actions { display: flex; gap: 6px; }

/* ===== A4 プレビュー ===== */
.sheet {
  background: #fff;
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  width: 100%;
  max-width: 620px;
  aspect-ratio: 210 / 297;
  margin: 0 auto;
  padding: 24px 28px;
  font-size: 0.72rem;
  color: #111;
  overflow-y: auto;
}

.sheet-header { display: flex; justify-content: space-between; align-items: baseline; border-bottom: 2px solid #333; padding-bottom: 8px; margin-bottom: 12px; }
.sheet-title { font-size: 1.5rem; font-weight: bold; letter-spacing: 0.3em; }
.sheet-docno { font-size: 0.75rem; color: #555; }

.sheet-top { display: flex; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.sheet-client { flex: 1 1 55%; }
.sheet-client-name { font-size: 1.05rem; font-weight: bold; border-bottom: 1px solid #333; padding-bottom: 4px; margin-bottom: 4px; }
.sheet-issuer { flex: 1 1 40%; text-align: right; position: relative; }
.sheet-logo { max-width: 120px; max-height: 50px; display: block; margin-left: auto; margin-bottom: 4px; }
.sheet-seal { width: 44px; height: 44px; object-fit: contain; position: absolute; right: 0; top: 10px; opacity: 0.9; }

.sheet-grand { display: flex; justify-content: space-between; align-items: baseline; background: #f2f6f5; padding: 8px 12px; border-radius: 4px; margin-bottom: 10px; }
.sheet-grand #sheet-grand-amount { font-size: 1.3rem; font-weight: bold; }

.sheet-items, .sheet-taxbreakdown { width: 100%; border-collapse: collapse; margin-bottom: 8px; }
.sheet-items th, .sheet-items td, .sheet-taxbreakdown th, .sheet-taxbreakdown td {
  border-bottom: 1px solid #ccc;
  padding: 4px 6px;
  text-align: right;
}
.sheet-items th:first-child, .sheet-items td:first-child,
.sheet-taxbreakdown th:first-child, .sheet-taxbreakdown td:first-child { text-align: left; }

.sheet-totals { margin-left: auto; width: 55%; margin-bottom: 10px; }
.sheet-totals > div { display: flex; justify-content: space-between; padding: 2px 0; }
.sheet-taxmode-note { text-align: right; color: #555; font-size: 0.68rem; }

.sheet-receipt-reason { border: 1px solid #333; padding: 8px; margin-bottom: 10px; }

.sheet-bank, .sheet-note { font-size: 0.7rem; color: #333; white-space: pre-wrap; margin-top: 6px; }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px);
  background: #1f2a2a; color: #fff; padding: 10px 20px; border-radius: 8px;
  font-size: 0.9rem; opacity: 0; pointer-events: none; transition: opacity 0.2s, transform 0.2s;
  z-index: 200; max-width: 90vw; text-align: center;
}
.toast-visible { opacity: 1; transform: translate(-50%, 0); }

/* ===== モーダル ===== */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.45);
  display: flex; align-items: center; justify-content: center; padding: 20px; z-index: 100;
}
.modal-overlay[hidden] { display: none; }
.modal-box {
  background: #fff; border-radius: 10px; padding: 24px; max-width: 480px; width: 100%;
  max-height: 85vh; overflow-y: auto;
}
.modal-actions { display: flex; gap: 10px; margin-top: 14px; }

/* ===== SEOセクション ===== */
.seo-content { max-width: 800px; margin: 40px auto; padding: 0 16px; }
.seo-content h1 { font-size: 1.4rem; }
.seo-content h2 { font-size: 1.15rem; margin-top: 2em; color: var(--color-primary-dark); }
.faq dt { font-weight: bold; margin-top: 1em; }
.faq dd { margin-left: 0; color: var(--color-muted); }

.app-footer {
  display: flex; flex-wrap: wrap; gap: 16px; justify-content: center;
  padding: 20px; font-size: 0.8rem; color: var(--color-muted);
  border-top: 1px solid var(--color-border); margin-top: 20px;
}
.app-footer a { color: var(--color-primary); }

/* ===== 印刷 ===== */
@page { size: A4; margin: 12mm; }

@media print {
  body * { visibility: hidden; }
  .sheet, .sheet * { visibility: visible; }
  .sheet {
    position: absolute; left: 0; top: 0;
    width: 210mm; height: auto; aspect-ratio: unset;
    max-width: none; box-shadow: none; border: none;
    padding: 0; margin: 0; overflow: visible;
    font-size: 11pt;
  }
}