/* Internal Ledger & Fund-Balance Tool — design system
   Minimal, spacious, professional. Neutral surfaces, one accent color,
   semantic money colors always paired with a +/- sign and a label. */

:root {
  --color-bg: #f7f7f5;
  --color-surface: #ffffff;
  --color-surface-sunken: #f1f1ee;
  --color-border: #e4e4e0;
  --color-text: #1e2129;
  --color-text-muted: #5b6072;
  --color-text-faint: #8b90a0;
  --color-accent: #2f5d9f;
  --color-accent-hover: #244a80;
  --color-accent-contrast: #ffffff;
  --color-credit: #1c7a4d;
  --color-credit-bg: #e8f5ee;
  --color-debit: #b0322a;
  --color-debit-bg: #fbecea;
  --color-warning: #9a6b12;
  --color-warning-bg: #fbf1de;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(20, 22, 30, 0.06);
  --shadow-md: 0 4px 16px rgba(20, 22, 30, 0.08);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #14161c;
    --color-surface: #1c1f28;
    --color-surface-sunken: #21242e;
    --color-border: #2c3040;
    --color-text: #eceef2;
    --color-text-muted: #a6acbf;
    --color-text-faint: #767c90;
    --color-accent: #6ea1e6;
    --color-accent-hover: #8bb4ec;
    --color-accent-contrast: #0c1626;
    --color-credit: #4fbf85;
    --color-credit-bg: #123a29;
    --color-debit: #e07b74;
    --color-debit-bg: #3d1c1a;
    --color-warning: #e0b84e;
    --color-warning-bg: #3a2f10;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.money, time, .tabular {
  font-variant-numeric: tabular-nums;
}

a { color: var(--color-accent); }

h1, h2, h3 { line-height: 1.25; margin: 0 0 var(--space-3); }
h1 { font-size: 1.75rem; font-weight: 650; }
h2 { font-size: 1.25rem; font-weight: 600; }
h3 { font-size: 1rem; font-weight: 600; }
p { margin: 0 0 var(--space-3); color: var(--color-text-muted); }

/* Layout shell */
.shell { min-height: 100vh; display: flex; flex-direction: column; }
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-3) var(--space-5);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.topbar__brand { font-weight: 650; letter-spacing: -0.01em; }
.topbar__nav { display: flex; gap: var(--space-4); align-items: center; }
.topbar__nav a { color: var(--color-text-muted); text-decoration: none; font-size: 0.9rem; }
.topbar__nav a:hover, .topbar__nav a.is-active { color: var(--color-text); }
.main {
  flex: 1;
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-5);
}
.main--narrow { max-width: 460px; }

.guest-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
}

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-5);
}
.card + .card { margin-top: var(--space-4); }
.card--elevated { box-shadow: var(--shadow-md); }

/* Forms */
label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: var(--space-1); color: var(--color-text); }
.field { margin-bottom: var(--space-4); }
.field__hint { font-size: 0.8rem; color: var(--color-text-faint); margin-top: var(--space-1); }
input[type="text"], input[type="password"], input[type="number"], input[type="date"], select, textarea {
  width: 100%;
  font: inherit;
  font-variant-numeric: tabular-nums;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}
.form-error {
  color: var(--color-debit);
  font-size: 0.82rem;
  margin-top: var(--space-1);
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font: inherit; font-weight: 600; font-size: 0.9rem;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}
.btn--primary { background: var(--color-accent); color: var(--color-accent-contrast); }
.btn--primary:hover { background: var(--color-accent-hover); }
.btn--secondary { background: var(--color-surface); color: var(--color-text); border-color: var(--color-border); }
.btn--secondary:hover { background: var(--color-surface-sunken); }
.btn--danger { background: var(--color-debit); color: #fff; }
.btn--block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Money display: never color-only, always +/- and a label */
.money-amount { font-variant-numeric: tabular-nums; font-weight: 600; }
.money-amount--credit { color: var(--color-credit); }
.money-amount--debit { color: var(--color-debit); }
.money-hero { font-size: 2.5rem; font-weight: 700; font-variant-numeric: tabular-nums; }

/* Status badges */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.78rem; font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
}
.badge--active, .badge--approved, .badge--ok { background: var(--color-credit-bg); color: var(--color-credit); }
.badge--pending { background: var(--color-warning-bg); color: var(--color-warning); }
.badge--disabled, .badge--revoked, .badge--rejected { background: var(--color-surface-sunken); color: var(--color-text-muted); }
.badge--deactivated, .badge--voided, .badge--mismatch { background: var(--color-debit-bg); color: var(--color-debit); }

/* Tables */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: var(--space-3); border-bottom: 1px solid var(--color-border); }
th { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--color-text-faint); font-weight: 600; }
td.is-numeric, th.is-numeric { text-align: right; font-variant-numeric: tabular-nums; }
tr.is-superseded td { color: var(--color-text-faint); text-decoration: line-through; }

/* Alerts / empty states */
.alert { border-radius: var(--radius-md); padding: var(--space-4); margin-bottom: var(--space-4); }
.alert--info { background: var(--color-surface-sunken); color: var(--color-text-muted); }
.alert--warning { background: var(--color-warning-bg); color: var(--color-warning); }
.alert--danger { background: var(--color-debit-bg); color: var(--color-debit); }
.empty-state { text-align: center; padding: var(--space-7) var(--space-4); color: var(--color-text-faint); }

/* Toasts */
#toast-container {
  position: fixed; bottom: var(--space-5); right: var(--space-5);
  display: flex; flex-direction: column; gap: var(--space-2);
  z-index: 1000;
}
.toast {
  background: var(--color-text); color: var(--color-bg);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  font-size: 0.88rem;
  max-width: 320px;
}
.toast--success { background: var(--color-credit); color: #fff; }
.toast--error { background: var(--color-debit); color: #fff; }

.full-width { width: 100%; }
pre { white-space: pre-wrap; word-break: break-word; font-size: 0.8rem; background: var(--color-surface-sunken); padding: var(--space-2); border-radius: var(--radius-sm); }
details summary { cursor: pointer; color: var(--color-accent); font-size: 0.85rem; }
details[open] summary { margin-bottom: var(--space-2); }
.stat-row { display: flex; gap: var(--space-4); }
.stat-card { flex: 1; text-decoration: none; color: inherit; }
.stat-card:hover { box-shadow: var(--shadow-md); }
.stack { display: flex; flex-direction: column; gap: var(--space-3); }
.row { display: flex; gap: var(--space-3); align-items: center; flex-wrap: wrap; }
.row--between { justify-content: space-between; }
.muted { color: var(--color-text-muted); }
.faint { color: var(--color-text-faint); font-size: 0.85rem; }

/* Responsive: narrow viewports get horizontally-scrollable tables and a
   stacked, wrapping top bar instead of overflowing the page. */
@media (max-width: 720px) {
  .main { padding: var(--space-4); }
  .topbar { flex-direction: column; align-items: flex-start; gap: var(--space-2); }
  .card { overflow-x: auto; }
  table { min-width: 480px; }
  .money-hero { font-size: 2rem; }
  .stat-row { flex-direction: column; }
}