/* ==========================================================================
   Design tokens (shared convention across this user's Flask tools)
   ========================================================================== */
:root {
  color-scheme: light dark;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;

  --text-xs: 11px;
  --text-sm: 12.5px;
  --text-base: 14px;
  --text-md: 15px;
  --text-lg: 17px;
  --text-xl: 21px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 999px;

  --transition-fast: 120ms ease;
  --transition-base: 180ms ease;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, .05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, .07), 0 1px 2px rgba(0, 0, 0, .04);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, .09);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, .14);

  --color-bg: #f4f5f7;
  --color-surface: #ffffff;
  --color-surface-raised: #fafbfc;
  --color-border: #dde1e6;
  --color-border-strong: #c2c8d1;
  --color-text: #1f2328;
  --color-text-muted: #656d78;
  --color-text-subtle: #97a0ab;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-active: #1e40af;
  --color-primary-subtle: #eaf0ff;
  --color-success: #15803d;
  --color-success-subtle: #eafbf0;
  --color-warning: #b45309;
  --color-warning-subtle: #fef3e2;
  --color-danger: #dc2626;
  --color-danger-subtle: #fdedec;
  --color-focus-ring: #2563eb;

  --color-chart-plan: #97a0ab;
  --color-chart-last-year: #b45309;
  --color-chart-actual: #2563eb;
  --color-chart-forecast: #15803d;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #14161a;
    --color-surface: #1c1f26;
    --color-surface-raised: #242832;
    --color-border: #333844;
    --color-border-strong: #454b58;
    --color-text: #e8eaed;
    --color-text-muted: #9aa1ab;
    --color-text-subtle: #6d7480;
    --color-primary: #6d97fb;
    --color-primary-hover: #8bacfc;
    --color-primary-active: #517fe8;
    --color-primary-subtle: #1c2a4d;
    --color-success: #4ade80;
    --color-success-subtle: #0e2f1c;
    --color-warning: #fbbf24;
    --color-warning-subtle: #3a2707;
    --color-danger: #f87171;
    --color-danger-subtle: #3a1414;
    --color-focus-ring: #8bacfc;

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, .35);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, .4);
    --shadow-md: 0 6px 16px rgba(0, 0, 0, .45);
    --shadow-lg: 0 16px 32px rgba(0, 0, 0, .55);

    --color-chart-plan: #6d7480;
    --color-chart-last-year: #fbbf24;
    --color-chart-actual: #6d97fb;
    --color-chart-forecast: #4ade80;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--text-base);
  line-height: 1.6;
}

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  background: var(--color-surface);
  color: var(--color-text);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
}
.skip-link:focus { left: var(--space-3); top: var(--space-3); }

/* ==========================================================================
   Layout shell
   ========================================================================== */
.topbar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.topbar h1 { font-size: var(--text-lg); margin: 0; font-weight: 700; }
.topbar h1 a { color: var(--color-text); }
.topbar nav { display: flex; gap: var(--space-4); margin-left: auto; }
.topbar nav a { font-weight: 600; font-size: var(--text-base); color: var(--color-text-muted); }
.topbar nav a:hover { color: var(--color-primary); text-decoration: none; }

.container { max-width: 1320px; margin: 0 auto; padding: var(--space-5) var(--space-6) var(--space-12); }

.section-title { font-size: var(--text-lg); margin: var(--space-2) 0 var(--space-4); }

/* ==========================================================================
   Buttons
   ========================================================================== */
button, .button-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  font-size: var(--text-sm);
  font-family: inherit;
  line-height: 1.4;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
button:hover, .button-link:hover { text-decoration: none; background: var(--color-surface-raised); border-color: var(--color-border-strong); }
button:disabled, .button-link[disabled] { opacity: .4; cursor: not-allowed; }

button.primary, .button-link.primary { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
button.primary:hover, .button-link.primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }

button.danger, .button-link.danger { color: var(--color-danger); border-color: var(--color-danger); }
button.danger:hover, .button-link.danger:hover { background: var(--color-danger-subtle); }

button.small, .button-link.small { padding: var(--space-1) var(--space-2); font-size: var(--text-xs); }
button.ghost, .button-link.ghost { border-color: transparent; background: transparent; }
button.ghost:hover, .button-link.ghost:hover { background: var(--color-surface-raised); }

.logout-form { margin-left: auto; }

/* ==========================================================================
   Auth (login)
   ========================================================================== */
.auth-shell { min-height: calc(100vh - 60px); display: flex; align-items: center; justify-content: center; padding: var(--space-6); }
.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-8) var(--space-6);
}
.auth-title { font-size: var(--text-lg); text-align: center; margin: 0 0 var(--space-6); }
.auth-field { position: relative; display: flex; flex-direction: column; gap: var(--space-1); }
.auth-field label { font-size: var(--text-xs); font-weight: 600; color: var(--color-text-muted); }
.auth-field input {
  padding: var(--space-3) var(--space-10) var(--space-3) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--text-base);
  background: var(--color-surface);
  color: var(--color-text);
}
.auth-toggle-visibility {
  position: absolute;
  right: var(--space-1);
  bottom: var(--space-1);
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  padding: var(--space-2);
}
.alert { display: flex; align-items: center; gap: var(--space-2); padding: var(--space-3); border-radius: var(--radius-sm); font-size: var(--text-sm); margin: var(--space-3) 0; }
.alert-danger { background: var(--color-danger-subtle); color: var(--color-danger); }
.auth-card .form-actions { position: static; box-shadow: none; border: none; padding: 0; margin-top: var(--space-4); }
.auth-card .form-actions button { width: 100%; justify-content: center; }

/* ==========================================================================
   Tabs
   ========================================================================== */
.tab-strip { display: flex; gap: var(--space-2); margin-bottom: var(--space-4); border-bottom: 1px solid var(--color-border); flex-wrap: wrap; }
.tab-link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.tab-link:hover { color: var(--color-text); text-decoration: none; }
.tab-link.is-active { color: var(--color-primary); border-color: var(--color-primary); }

/* ==========================================================================
   Filter bar
   ========================================================================== */
.filter-bar { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-4); margin-bottom: var(--space-4); }
.filter-row { display: flex; flex-wrap: wrap; gap: var(--space-4); align-items: center; }
.filter-row label { display: flex; flex-direction: column; font-size: var(--text-xs); color: var(--color-text-muted); gap: var(--space-1); font-weight: 600; }
.filter-row select, .filter-row input { padding: var(--space-2) var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: var(--text-base); background: var(--color-surface); color: var(--color-text); }
.hint { color: var(--color-text-muted); font-size: var(--text-sm); margin: var(--space-1) 0 0; }
.hint-inline { color: var(--color-warning); font-size: var(--text-xs); }

/* ==========================================================================
   KPI cards
   ========================================================================== */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--space-4); margin-bottom: var(--space-6); }
.kpi-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-4); box-shadow: var(--shadow-xs); }
.kpi-card-forecast { border-color: var(--color-primary); }
.kpi-label { font-size: var(--text-xs); color: var(--color-text-muted); font-weight: 600; margin-bottom: var(--space-2); }
.kpi-value { font-size: var(--text-xl); font-weight: 700; }
.kpi-sub { font-size: var(--text-sm); margin-top: var(--space-1); font-weight: 600; }

/* ==========================================================================
   Chart
   ========================================================================== */
.chart-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-4); margin-bottom: var(--space-6); }
.chart-container { width: 100%; overflow-x: auto; }
.chart-container-inner { position: relative; }
.chart-container svg { width: 100%; height: auto; min-width: 640px; display: block; }
.chart-legend { display: flex; gap: var(--space-4); flex-wrap: wrap; margin-top: var(--space-2); font-size: var(--text-sm); }
.chart-legend-item { display: inline-flex; align-items: center; gap: var(--space-1); }
.chart-legend-swatch { width: 12px; height: 12px; border-radius: 2px; display: inline-block; }

.chart-tooltip {
  position: absolute;
  z-index: 50;
  pointer-events: none;
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  min-width: 160px;
  white-space: nowrap;
}
.chart-tooltip-title { font-size: var(--text-sm); font-weight: 700; margin-bottom: var(--space-1); color: var(--color-text); }
.chart-tooltip-row { display: flex; align-items: center; gap: var(--space-2); padding: 2px 0; }
.chart-tooltip-swatch { width: 9px; height: 9px; border-radius: 2px; flex-shrink: 0; }
.chart-tooltip-label { color: var(--color-text-muted); flex: 1; }
.chart-tooltip-value { font-weight: 600; color: var(--color-text); text-align: right; }

/* ==========================================================================
   Tables
   ========================================================================== */
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; }
th, td { padding: var(--space-2) var(--space-3); border-bottom: 1px solid var(--color-border); text-align: right; vertical-align: middle; font-size: var(--text-sm); white-space: nowrap; }
th:first-child, td:first-child, th:nth-child(2), td:nth-child(2) { text-align: left; }
th { background: var(--color-surface-raised); color: var(--color-text-muted); font-weight: 600; }
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--color-surface-raised); }

.budget-table .cell-sub { font-size: var(--text-xs); color: var(--color-text-muted); font-weight: normal; }
.row-status-in_progress { background: var(--color-primary-subtle); }
.row-status-future td { color: var(--color-text-subtle); }

.status-badge { display: inline-flex; padding: 2px var(--space-2); border-radius: var(--radius-full); font-size: var(--text-xs); font-weight: 600; }
.status-closed { background: var(--color-surface-raised); color: var(--color-text-muted); border: 1px solid var(--color-border); }
.status-progress { background: var(--color-primary); color: #fff; }
.status-future { background: transparent; color: var(--color-text-subtle); border: 1px dashed var(--color-border); }

.num-pos { color: var(--color-success); font-weight: 700; }
.num-neg { color: var(--color-danger); font-weight: 700; }
.num-flat { color: var(--color-text-muted); }

/* ==========================================================================
   Forms
   ========================================================================== */
.record-form { display: flex; flex-direction: column; gap: var(--space-4); max-width: 900px; }
.form-section { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-4); }
.form-section-title { font-size: var(--text-md); margin: 0 0 var(--space-3); }
.form-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.form-grid label.wide { grid-column: 1 / -1; }
.form-grid label { display: flex; flex-direction: column; gap: var(--space-1); font-size: var(--text-xs); color: var(--color-text-muted); font-weight: 600; }
.form-grid input {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--text-base);
  font-family: inherit;
  background: var(--color-surface);
  color: var(--color-text);
}
.form-actions { display: flex; gap: var(--space-3); }

.input-mode-toggle { display: flex; gap: var(--space-4); margin-bottom: var(--space-3); }
.radio-inline { display: inline-flex !important; flex-direction: row !important; align-items: center; gap: var(--space-1); font-size: var(--text-sm) !important; color: var(--color-text) !important; font-weight: 600; }
.form-grid label.is-inactive { opacity: .45; }
.form-grid input:disabled { background: var(--color-surface-raised); cursor: not-allowed; }

.history-section { margin-top: var(--space-6); max-width: 900px; }

/* ==========================================================================
   Masters (facility management)
   ========================================================================== */
.master-section { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-4); max-width: 760px; }
.master-table input[type="text"] { padding: var(--space-1) var(--space-2); border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface); color: var(--color-text); width: 220px; }
.reorder-cell { display: flex; flex-direction: column; gap: 2px; text-align: left; }
.reorder-cell button:disabled { opacity: .3; cursor: not-allowed; }
.inline-form { display: inline-flex; gap: var(--space-1); align-items: center; margin: 0; }
.actions { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; justify-content: flex-end; }
.add-form { margin-top: var(--space-3); }

.empty { color: var(--color-text-muted); padding: var(--space-8) var(--space-4); text-align: center; }

.recent-months-table td.recent-month-cell { text-align: left; min-width: 160px; }
.recent-month-label { font-weight: 600; margin-bottom: 2px; display: flex; align-items: center; gap: var(--space-2); }