:root {
  color-scheme: light;
  --ink: #111111;
  --muted: #6b6b6b;
  --line: #e2e2e2;
  --paper: #ffffff;
  --bg: #f6f7f8;
  --danger: #b42318;
  --ok: #067647;
  --warn: #b54708;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Segoe UI", sans-serif;
  font-size: 14px;
}

button, input, select, textarea { font: inherit; }

a { color: #1849a9; }

/* ========== ヘッダー ========== */

.topbar {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-inner {
  align-items: center;
  display: flex;
  gap: 22px;
  margin: 0 auto;
  max-width: 1180px;
  padding: 12px 20px;
}

.topbar-brand { font-weight: 800; letter-spacing: 0.02em; }

.topbar-nav { display: flex; flex-wrap: wrap; gap: 4px; }

.topbar-nav a {
  border-radius: 9px;
  color: var(--ink);
  padding: 7px 14px;
  text-decoration: none;
}

.topbar-nav a:hover { background: var(--bg); }
.topbar-nav a.active { background: var(--ink); color: #ffffff; }

.topbar-user {
  color: var(--muted);
  display: flex;
  gap: 12px;
  margin-left: auto;
  white-space: nowrap;
}

/* ========== ページ ========== */

.page {
  margin: 0 auto;
  max-width: 1180px;
  padding: 24px 20px 64px;
}

h1 { font-size: 22px; margin: 0 0 18px; }
h2 { font-size: 16px; margin: 28px 0 10px; }

/* 静的な説明文は文節改行(keep-all+文中のゼロ幅スペース)で折り返す */
.note { color: var(--muted); font-size: 12px; line-height: 1.7; margin: 6px 0 12px; word-break: keep-all; overflow-wrap: anywhere; }
.small { color: var(--muted); font-size: 12px; }
.empty { color: var(--muted); padding: 20px; text-align: center; }

.flash {
  border-radius: 10px;
  margin-bottom: 16px;
  padding: 12px 14px;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.flash.ok { background: #ecfdf3; color: var(--ok); }
.flash.error { background: #fef3f2; color: var(--danger); white-space: pre-line; }
.flash.warn { background: #fffaeb; color: var(--warn); }

/* ========== ツールバー ========== */

.toolbar {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.toolbar-spacer { flex: 1; }

.inline-form {
  align-items: center;
  display: flex;
  gap: 8px;
}

.button, button {
  background: var(--paper);
  border: 1px solid #cfcfcf;
  border-radius: 9px;
  color: var(--ink);
  cursor: pointer;
  padding: 7px 14px;
  text-decoration: none;
  white-space: nowrap;
}

.button:hover, button:hover { background: #fafafa; }

.button.primary, button.primary {
  background: var(--ink);
  border-color: var(--ink);
  color: #ffffff;
  font-weight: 700;
}
.button.primary:hover, button.primary:hover { background: #2a2a2a; }

button.danger { border-color: #f0c2bd; color: var(--danger); }

input[type="text"], input[type="password"], input[type="number"], input[type="email"],
input[type="date"], input[type="time"], select, textarea {
  background: var(--paper);
  border: 1px solid #cfcfcf;
  border-radius: 8px;
  padding: 6px 9px;
}

textarea { resize: vertical; }

/* ========== 表 ========== */

.grid {
  background: var(--paper);
  border: 1px solid var(--line);
  border-collapse: separate;
  border-radius: 12px;
  border-spacing: 0;
  overflow: hidden;
  width: 100%;
}

.grid th, .grid td {
  border-bottom: 1px solid var(--line);
  padding: 9px 12px;
  text-align: left;
  vertical-align: middle;
}

.grid thead th {
  background: #fbfbfc;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.grid tbody tr:last-child td { border-bottom: 0; }
.grid tfoot th, .grid tfoot td { background: #fbfbfc; border-top: 1px solid var(--line); }

.grid .num { font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.grid .strong { font-weight: 700; }
.grid .nowrap { white-space: nowrap; }
.grid .muted-row { color: var(--muted); }

.link { margin-left: 8px; white-space: nowrap; }

.chip, .tag {
  border-radius: 999px;
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 10px;
}

.tag.draft { background: #f0f0f0; color: var(--muted); }
.tag.issued { background: #ecfdf3; color: var(--ok); }
.tag.invoice { border: 1px solid var(--line); color: var(--ink); }
.tag.receipt { border: 1px solid var(--line); color: var(--ink); }

/* 入金状況 */
.tag.pay-paid { background: #ecfdf3; color: var(--ok); }
.tag.pay-open { background: #fffaeb; color: var(--warn); }
.tag.pay-overdue { background: #fef3f2; color: var(--danger); }

/* 期限超過の行は一覧でひと目で分かるようにする */
.grid tr.row-overdue td { background: #fffbfa; }
.grid td.overdue-date { color: var(--danger); font-weight: 700; }

/* ========== 集計カード ========== */

.stat-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }

.stat {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  flex: 0 1 240px;
  padding: 14px 16px;
}

.stat.overdue { border-color: #f0c2bd; }
.stat.overdue .stat-value { color: var(--danger); }

.stat-value { font-size: 24px; font-weight: 800; font-variant-numeric: tabular-nums; line-height: 1.2; }
.stat-label { color: var(--muted); font-size: 12px; margin-top: 4px; }

/* ========== フォーム ========== */

.card-form {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
}

.form-row {
  align-items: end;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
}

.form-row label { display: grid; font-size: 12px; gap: 4px; }
.form-row label span { color: var(--muted); font-weight: 700; }

.field-wide { flex: 1 1 260px; }
.field-wide input, .field-wide textarea { width: 100%; }

/* ========== 明細テーブル(請求書・領収書の入力) ========== */

.item-table { border-collapse: collapse; width: 100%; }
.item-table th {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 6px;
  text-align: left;
}
.item-table td { padding: 4px 6px; }
.item-table input[type="text"] { width: 100%; }
.item-table input.qty, .item-table input.price { text-align: right; width: 90px; }
.item-table select.rate { width: 80px; }
.item-table .amount-cell { font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; width: 100px; }
.item-table .remove-row { color: var(--danger); }

.totals-box {
  background: var(--bg);
  border-radius: 10px;
  margin-top: 14px;
  padding: 12px 16px;
  max-width: 360px;
  margin-left: auto;
}
.totals-box .row { display: flex; justify-content: space-between; padding: 3px 0; }
.totals-box .row.total { border-top: 1px solid var(--line); font-size: 17px; font-weight: 800; margin-top: 6px; padding-top: 8px; }

.form-actions { display: flex; gap: 10px; margin-top: 18px; }

/* ========== 詳細ビュー ========== */

.detail-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
}
.detail-head { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; margin-bottom: 16px; }
.detail-head .meta { color: var(--muted); font-size: 13px; line-height: 1.9; }
.detail-actions { display: flex; flex-wrap: wrap; gap: 8px; }

/* ========== ログイン ========== */

.login-body {
  align-items: center;
  display: flex;
  justify-content: center;
  min-height: 100vh;
}

.login-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 32px;
  width: min(100%, 380px);
}

.login-card h1 { font-size: 20px; margin: 0 0 4px; text-align: center; }
.login-sub { color: var(--muted); font-size: 13px; margin: 0 0 22px; text-align: center; }

.login-card .field-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 5px;
}

.login-card input {
  border: 1px solid #cfcfcf;
  border-radius: 9px;
  margin-bottom: 16px;
  padding: 10px 12px;
  width: 100%;
}

.login-card .primary {
  background: var(--ink);
  border: 0;
  border-radius: 10px;
  color: #ffffff;
  cursor: pointer;
  font-weight: 700;
  padding: 12px;
  width: 100%;
}

@media (max-width: 720px) {
  .topbar-inner { flex-wrap: wrap; gap: 10px; }
  .topbar-user { margin-left: 0; }
  .page { padding: 18px 12px 48px; }
  .grid { display: block; overflow-x: auto; }
  .totals-box { margin-left: 0; max-width: none; }
  /* 明細テーブルは固定幅列(数量90+単価90+税率80+金額100)で375px端末に収まらないため
     .gridと同じ横スクロール方式にする */
  .item-table { display: block; overflow-x: auto; }
  /* ボタン列・絞り込みフォームは折り返して全ボタンに到達できるようにする */
  .form-actions { flex-wrap: wrap; }
  .inline-form { flex-wrap: wrap; }
  .inline-form input[type="text"] { flex: 1 1 100%; }
  .detail-actions { flex-wrap: wrap; }
}