:root {
  --primary: #0b2a5b;
  --primary-light: #153d7a;
  --accent: #c9a34e;
  --bg: #f3f4f6;
  --card: #fff;
  --text: #1f2937;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --income: #15803d;
  --income-bg: #f0fdf4;
  --expense: #b91c1c;
  --expense-bg: #fef2f2;
  --warn: #b45309;
  --warn-bg: #fffbeb;
  --radius: 8px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ── Nav ── */
.nav {
  background: var(--primary);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0,0,0,.15);
}
.nav-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
}
.nav-brand {
  color: var(--accent);
  text-decoration: none;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .5px;
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  padding: 4px 8px;
}
.nav-links a {
  color: rgba(255,255,255,.8);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 14px;
  transition: background .15s;
}
.nav-links a:hover, .nav-links a.active {
  background: rgba(255,255,255,.12);
  color: #fff;
}
.logout-link { opacity: .6; }

@media (max-width: 700px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 52px;
    left: 0; right: 0;
    background: var(--primary);
    padding: 8px 16px 16px;
    flex-direction: column;
    box-shadow: 0 4px 8px rgba(0,0,0,.2);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 12px; font-size: 15px; }
}

@media (min-width: 701px) {
  .nav-links { display: flex; gap: 4px; align-items: center; }
}

/* ── Container ── */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 16px;
}

/* ── Flash ── */
.flash-wrap { margin-bottom: 12px; }
.flash {
  background: var(--income-bg);
  color: var(--income);
  border: 1px solid #bbf7d0;
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 14px;
}
.flash-error {
  background: var(--expense-bg);
  color: var(--expense);
  border-color: #fecaca;
}

/* ── Alert ── */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 14px;
}
.alert-warn {
  background: var(--warn-bg);
  color: var(--warn);
  border: 1px solid #fde68a;
}
.alert a { color: inherit; font-weight: 600; }

/* ── Cards ── */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 1px 2px rgba(0,0,0,.05);
}
.card h2 { font-size: 16px; margin-bottom: 12px; color: var(--primary); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}
@media (max-width: 500px) {
  .card-grid { grid-template-columns: 1fr; }
}
.summary-card { text-align: center; }
.summary-card.year { opacity: .8; }
.card-label { font-size: 13px; color: var(--text-muted); margin-bottom: 4px; }
.card-value { font-size: 22px; font-weight: 700; }
.card-value.income { color: var(--income); }
.card-value.expense { color: var(--expense); }
.summary-card.year .card-value { font-size: 18px; }

.card-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.card-header-row h2 { margin-bottom: 0; }

/* ── Page header ── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.page-header h1 { font-size: 20px; color: var(--primary); }
.month-nav { display: flex; gap: 6px; }

/* ── Tables ── */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th {
  text-align: left;
  padding: 8px 10px;
  font-size: 12px;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
.table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.table tr.clickable { cursor: pointer; }
.table tr.clickable:hover { background: #f9fafb; }
.amount { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.desc-cell { max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

@media (max-width: 600px) {
  .table { font-size: 13px; }
  .table th, .table td { padding: 6px 6px; }
  .table th:nth-child(n+5), .table td:nth-child(n+5) { display: none; }
}

/* ── Tags ── */
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}
.tag-income { background: var(--income-bg); color: var(--income); }
.tag-expense { background: var(--expense-bg); color: var(--expense); }
.tag-export { background: #eff6ff; color: #1d4ed8; margin-left: 4px; }
.tag-complete { background: var(--income-bg); color: var(--income); }
.tag-missing { background: var(--expense-bg); color: var(--expense); }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s;
  white-space: nowrap;
}
.btn:hover { background: #f3f4f6; }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-lg { padding: 12px 24px; font-size: 15px; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-light); }
.btn-danger {
  background: #fff;
  color: var(--expense);
  border-color: var(--expense);
}
.btn-danger:hover { background: var(--expense-bg); }

/* ── Forms ── */
.form-card { max-width: 640px; }
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group input[type="password"],
.form-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 16px;
  background: #fff;
  color: var(--text);
  -webkit-appearance: none;
}
.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(11,42,91,.1);
}
.form-group input[type="file"] {
  font-size: 14px;
  padding: 8px 0;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
@media (max-width: 500px) {
  .form-row { grid-template-columns: 1fr; }
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.toggle-group { display: flex; gap: 0; }
.toggle input { display: none; }
.toggle-btn {
  display: block;
  padding: 10px 20px;
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 14px;
  transition: all .15s;
}
.toggle:first-child .toggle-btn { border-radius: var(--radius) 0 0 var(--radius); }
.toggle:last-child .toggle-btn { border-radius: 0 var(--radius) var(--radius) 0; border-left: none; }
.toggle input:checked + .expense-btn { background: var(--expense); color: #fff; border-color: var(--expense); }
.toggle input:checked + .income-btn { background: var(--income); color: #fff; border-color: var(--income); }

.checkbox-label {
  display: flex !important;
  align-items: center;
  gap: 8px;
  font-weight: 400 !important;
  cursor: pointer;
}
.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
}

.hint {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 8px;
  line-height: 1.4;
}
.meta-info {
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-muted);
}

/* ── Receipt preview ── */
.receipt-preview { margin: 4px 0; }
.receipt-img {
  max-width: 200px;
  max-height: 200px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

/* ── Filter bar ── */
.filter-bar { padding: 12px 16px; }
.filter-form {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
.filter-form select {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  background: #fff;
}
.filter-totals {
  display: flex;
  gap: 16px;
  font-size: 14px;
  font-weight: 600;
}
.filter-totals .income { color: var(--income); }
.filter-totals .expense { color: var(--expense); }

/* ── Export docs ── */
.doc-checklist-legend {
  margin: 8px 0 12px 20px;
  font-size: 14px;
}
.doc-checklist-legend li { margin-bottom: 2px; }

.export-doc-card { border-left: 4px solid var(--border); }
.export-doc-card.complete { border-left-color: var(--income); }
.export-doc-card.incomplete { border-left-color: var(--expense); }

.export-doc-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  flex-wrap: wrap;
}
.awb-line { font-size: 13px; color: var(--text-muted); margin: 4px 0 8px; }

.doc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 12px;
}
@media (max-width: 500px) {
  .doc-grid { grid-template-columns: 1fr; }
}
.doc-item {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13px;
}
.doc-item.done {
  background: var(--income-bg);
  border-color: #bbf7d0;
}
.doc-item-label { margin-bottom: 4px; font-weight: 500; }
.doc-item.done .doc-item-label { color: var(--income); }

.upload-inline { margin-top: 4px; }
.upload-inline input[type="file"] { font-size: 12px; }

/* ── Export page ── */
.export-year-card h2 { margin-bottom: 16px; }
.export-buttons { display: flex; gap: 10px; flex-wrap: wrap; }
.checklist { margin: 12px 0 0 20px; font-size: 14px; }
.checklist li { margin-bottom: 6px; }

/* ── Login ── */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--primary) 0%, #1e3a5f 100%);
}
.login-card {
  background: var(--card);
  border-radius: 12px;
  padding: 40px 32px;
  width: 100%;
  max-width: 380px;
  margin: 16px;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0,0,0,.2);
}
.login-card h1 {
  color: var(--primary);
  font-size: 24px;
  margin-bottom: 4px;
}
.login-sub {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 24px;
}
.login-card input[type="password"] {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 16px;
  margin-bottom: 16px;
  text-align: center;
}
.login-card input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(11,42,91,.1);
}
.login-card button {
  width: 100%;
  padding: 12px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  cursor: pointer;
  transition: background .15s;
}
.login-card button:hover { background: var(--primary-light); }

/* ── Misc ── */
.empty {
  text-align: center;
  color: var(--text-muted);
  padding: 32px 0;
  font-size: 14px;
}
.income { color: var(--income); }
.expense { color: var(--expense); }