/* =========================================================================
   DESIGN TOKENS
   A ledger-inspired palette: deep navy for trust/structure, warm brass for
   action/attention, warm paper background instead of stark white or dark
   mode. Hairline rules instead of card shadows — this is a register, not
   a SaaS dashboard.
   ========================================================================= */
:root {
  --color-bg:        #F7F5F0;
  --color-surface:   #FFFFFF;
  --color-ink:       #1A1A18;
  --color-muted:     #6B6558;
  --color-primary:   #00173D;   /* brand navy - nav, headings, primary actions */
  --color-primary-soft: #0A2A52;
  --color-accent:    #C08A3E;   /* warm brass - calls to action, highlights */
  --color-line:      #DEDACE;   /* hairline borders */
  --color-success:   #3F6B4A;
  --color-alert:     #FB0137;   /* brand red - also used for danger/destructive actions */

  --font-display: 'Source Serif 4', Georgia, serif;
  --font-body:    'IBM Plex Sans', -apple-system, sans-serif;
  --font-mono:    'IBM Plex Mono', ui-monospace, monospace;

  --radius: 3px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  margin: 0 0 var(--space-3) 0;
  line-height: 1.2;
}
h1 { font-size: 28px; }
h2 { font-size: 20px; }
h3 { font-size: 16px; }

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

.app-shell {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}

.nav {
  background: var(--color-primary);
  color: #EDEAE0;
  padding: var(--space-3) 0;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
.nav .brand {
  font-family: var(--font-display);
  font-size: 18px;
  color: #fff;
  padding: var(--space-3) var(--space-3) var(--space-4);
  border-bottom: 1px solid rgba(255,255,255,0.12);
  margin-bottom: var(--space-2);
}
.nav > a {
  display: block;
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  padding: 8px var(--space-3);
  font-size: 14px;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
.nav > a:hover { background: rgba(255,255,255,0.08); color: #fff; }
.nav > a.active { color: #fff; background: rgba(255,255,255,0.1); }

.main {
  padding: var(--space-5);
  max-width: 1000px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
}

.metric {
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}
.metric .item { min-width: 140px; }
.metric .value {
  font-family: var(--font-mono);
  font-size: 26px;
  font-variant-numeric: tabular-nums;
}
.metric .label {
  color: var(--color-muted);
  font-size: 13px;
}

table { width: 100%; border-collapse: collapse; }
th, td {
  text-align: left;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-line);
  font-size: 14px;
}
th { color: var(--color-muted); font-weight: 500; }
td.num, th.num { text-align: right; font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  border: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 14px;
  cursor: pointer;
}
.btn:hover { background: var(--color-primary-soft); }
.btn.accent { background: var(--color-accent); color: #26190A; }
.btn.accent:hover { filter: brightness(0.95); }

input, select {
  font-family: var(--font-body);
  font-size: 14px;
  padding: var(--space-2);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: #fff;
  width: 100%;
}
label { display: block; font-size: 13px; color: var(--color-muted); margin-bottom: var(--space-1); }
.field { margin-bottom: var(--space-3); }

.status { font-size: 12px; padding: 2px 8px; border-radius: 999px; }
.status.paid, .status.matched { background: #E4EEE6; color: var(--color-success); }
.status.unpaid, .status.unmatched { background: #F3E4E0; color: var(--color-alert); }
.status.partial, .status.suggested { background: #F3EBD8; color: #8A6314; }

.empty {
  color: var(--color-muted);
  font-style: italic;
  padding: var(--space-4) 0;
}

.error { color: var(--color-alert); font-size: 13px; margin-top: var(--space-2); }
.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-card { width: 340px; }

/* ── 8-tab sidebar nav groups ─────────────────────────────────────────── */
.nav-group { }

.nav-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px var(--space-3);
  color: rgba(255,255,255,0.75);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
  user-select: none;
}
.nav-group-header:hover { background: rgba(255,255,255,0.08); color: #fff; }
.nav-group-header.active { color: #fff; background: rgba(255,255,255,0.1); }

.nav-chevron {
  font-size: 14px;
  transition: transform 0.2s;
  opacity: 0.5;
  line-height: 1;
}
.nav-group.nav-open .nav-chevron { transform: rotate(90deg); }

.nav-group-body { display: none; }
.nav-group.nav-open .nav-group-body { display: block; }

/* Sub-items: same style as top-level links, no indent, no dark bg */
.nav-group-body a {
  display: block;
  padding: 8px var(--space-3);
  color: rgba(255,255,255,0.75);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}
.nav-group-body a:hover { background: rgba(255,255,255,0.08); color: #fff; }
.nav-group-body a.active { color: #fff; background: rgba(255,255,255,0.1); }

.nav-signout {
  padding: 8px var(--space-3) !important;
  opacity: 0.6;
  font-size: 14px;
  border-top: 1px solid rgba(255,255,255,0.12);
  margin-top: auto;
}
.nav-signout:hover { opacity: 1; }

/* ── Page tab bars (loans, banking, members) ─────────────────────────── */
.loan-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--color-line);
  margin-bottom: 20px;
}
.loan-tab-btn {
  background: none;
  border: none;
  padding: 10px 18px;
  cursor: pointer;
  font-size: 14px;
  color: var(--color-muted);
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  font-family: inherit;
  transition: color 0.15s;
}
.loan-tab-btn:hover { color: var(--color-ink); }
.loan-tab-btn.active {
  color: var(--color-ink);
  font-weight: 600;
  border-bottom-color: var(--color-accent);
}

/* ── KPI dashboard cards ─────────────────────────────────────────────── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}
.kpi-card {
  border-radius: 6px;
  padding: 16px;
  cursor: pointer;
  transition: opacity 0.15s;
}
.kpi-card:hover { opacity: 0.85; }
.kpi-num   { font-size: 28px; font-weight: 700; }
.kpi-label { font-size: 13px; font-weight: 600; margin-top: 4px; }
.kpi-sub   { font-size: 12px; color: var(--color-muted); margin-top: 2px; }

/* ── Slide-in drawer ─────────────────────────────────────────────────── */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.35);
  display: none;
  z-index: 40;
}
.drawer-backdrop.open { display: block; }

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: 420px;
  max-width: 94vw;
  background: var(--color-surface);
  z-index: 50;
  transform: translateX(100%);
  transition: transform 0.22s ease;
  overflow-y: auto;
  padding: var(--space-4);
  box-shadow: -4px 0 24px rgba(0,0,0,0.14);
}
.drawer.open { transform: translateX(0); }

.drawer h2 { margin-bottom: var(--space-3); }

.drawer-actions {
  display: flex;
  gap: 8px;
  margin-top: var(--space-4);
  flex-wrap: wrap;
}

.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin: var(--space-4) 0 var(--space-2);
}

/* Edhafu logo image. White version on dark backgrounds (sidebar),
   dark version on light backgrounds (sign-in cards). */
img.edhafu-logo { display: block; height: 40px; width: auto; max-width: 100%; }
.auth-brand img.edhafu-logo { height: 56px; margin: 0 auto; }

/* Brand name written inside a sentence (too small for the image) */
.edhafu-name { font-weight: 700; white-space: nowrap; }
.edhafu-name .e { color: #FB0137; }