@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@600;700;800&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --bg: #F5F6F8;
  --surface: #FFFFFF;
  --ink: #14171F;
  --ink-soft: #6B7280;
  --ink-faint: #9CA3AF;
  --border: #E7E9EE;

  --accent: #4F46E5;
  --accent-hover: #4338CA;
  --accent-soft: #EEF0FE;

  --success: #16A34A;
  --success-soft: #E9F9EF;
  --warning: #C2760C;
  --warning-soft: #FDF3DF;
  --danger: #DC2626;
  --danger-soft: #FDEBEB;
  --neutral: #6B7280;
  --neutral-soft: #F0F1F3;

  --font-display: "Manrope", "Inter", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(20, 23, 31, 0.05);
  --shadow-md: 0 8px 24px rgba(20, 23, 31, 0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- Auth pages ---------- */

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 40px 36px;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 4px;
}

.brand .dot { color: var(--accent); }

.tagline {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin: 0 0 28px;
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.field input, .field select, .field textarea {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  font-size: 0.95rem;
  color: var(--ink);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.field-mono input { font-family: var(--font-mono); }

button {
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 600;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease, opacity 0.15s ease;
}

.btn-primary {
  width: 100%;
  padding: 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  margin-top: 8px;
}

.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  padding: 10px 16px;
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover { border-color: var(--ink-faint); }

.btn-text {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 0.85rem;
  padding: 0;
}

.btn-text:hover { color: var(--accent-hover); }

.switch-line {
  text-align: center;
  margin-top: 20px;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.error-banner {
  background: var(--danger-soft);
  color: var(--danger);
  border: 1px solid rgba(220, 38, 38, 0.25);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 0.85rem;
  margin-bottom: 16px;
  display: none;
}

.error-banner.show { display: block; }

/* ---------- App shell ---------- */

.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 232px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 28px 18px;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar .brand { font-size: 1.35rem; margin: 0 0 32px; padding: 0 10px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-bottom: 2px;
}

.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }

.nav-item.active {
  background: var(--accent-soft);
  color: var(--accent);
}

.nav-item:not(.active):hover { background: var(--neutral-soft); color: var(--ink); }

.sidebar-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--ink-soft);
  padding-left: 10px;
}

.main {
  flex: 1;
  padding: 36px 44px;
  max-width: 1040px;
  padding-bottom: 100px; /* room above the mobile bottom nav */
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 24px;
}

.page-header h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.6rem;
  letter-spacing: -0.01em;
  margin: 0 0 4px;
}

.page-header p { color: var(--ink-soft); margin: 0; font-size: 0.88rem; }

.summary-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 28px;
}

.summary-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.summary-card .label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.summary-card .value {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 1.55rem;
}

.summary-card.alert { border-color: rgba(220, 38, 38, 0.3); }
.summary-card.alert .value { color: var(--danger); }

/* Ledger table */

.ledger {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.ledger-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 15px 20px;
  border-bottom: 1px solid var(--border);
  border-left: 3px solid transparent;
  font-size: 0.9rem;
  transition: background 0.12s ease;
}

.ledger-row:hover { background: #FBFBFC; }
.ledger-row:last-child { border-bottom: none; }

.ledger-row.head {
  background: var(--bg);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  font-weight: 600;
}
.ledger-row.head:hover { background: var(--bg); }

/* Status-colored left edge — no JS needed, driven by the stamp inside */
.ledger-row:has(.stamp-paid) { border-left-color: var(--success); }
.ledger-row:has(.stamp-unpaid) { border-left-color: var(--warning); }
.ledger-row:has(.stamp-overdue) { border-left-color: var(--danger); }

.ledger-row .amount { font-family: var(--font-mono); font-weight: 500; }
.ledger-row .date { font-family: var(--font-mono); color: var(--ink-soft); font-size: 0.85rem; }

.flagged-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.flag-card {
  border: 1px solid var(--border);
  border-left: 3px solid transparent;
  border-radius: var(--radius-md);
  padding: 18px 20px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.flag-card:has(.stamp-open) { border-left-color: var(--warning); }
.flag-card:has(.stamp-disputed) { border-left-color: var(--neutral); }
.flag-card:has(.stamp-resolved) { border-left-color: var(--success); }
.flag-card:has(.stamp-confirmed_fraud) { border-left-color: var(--danger); }

.flag-card .fname { font-weight: 600; margin-bottom: 2px; }
.flag-card .finst { font-size: 0.8rem; color: var(--ink-soft); margin-bottom: 10px; }
.flag-card .freason { font-size: 0.87rem; margin-bottom: 10px; line-height: 1.5; }
.flag-card .fmeta { display: flex; justify-content: space-between; align-items: center; }
.flag-card .famount { font-family: var(--font-mono); font-size: 0.85rem; color: var(--ink-soft); }

/* Status pills — flat, soft-colored chips */

.stamp {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-body);
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: capitalize;
  padding: 4px 10px;
  border-radius: 999px;
}

.stamp::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.stamp-unpaid { color: var(--warning); background: var(--warning-soft); }
.stamp-paid { color: var(--success); background: var(--success-soft); }
.stamp-overdue { color: var(--danger); background: var(--danger-soft); }
.stamp-open { color: var(--warning); background: var(--warning-soft); }
.stamp-disputed { color: var(--neutral); background: var(--neutral-soft); }
.stamp-resolved { color: var(--success); background: var(--success-soft); }
.stamp-confirmed_fraud { color: var(--danger); background: var(--danger-soft); }

.icon-btn {
  background: none;
  border: none;
  color: var(--ink-soft);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
}

.icon-btn:hover { color: var(--ink); background: var(--neutral-soft); }

.empty-state {
  padding: 48px 20px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.form-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  padding: 22px 24px;
  margin-bottom: 24px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}

.hidden { display: none !important; }

/* ---------- Mobile bottom nav ---------- */

.bottom-nav {
  display: none;
}

@media (max-width: 860px) {
  .app-shell { flex-direction: column; }

  .sidebar { display: none; }

  .main {
    padding: 20px 16px 96px;
    max-width: 100%;
  }

  .summary-row, .form-grid, .flagged-grid {
    grid-template-columns: 1fr;
  }

  .ledger-row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 16px 18px;
  }

  .ledger-row.head { display: none; }

  .page-header {
    flex-direction: column;
    align-items: stretch;
  }

  .page-header .btn-secondary { width: 100%; }

  .bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--surface);
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 16px rgba(20, 23, 31, 0.06);
    padding: 6px 4px calc(6px + env(safe-area-inset-bottom));
    z-index: 40;
  }

  .bottom-nav .nav-item {
    flex: 1;
    flex-direction: column;
    gap: 3px;
    font-size: 0.68rem;
    padding: 8px 4px;
    border-radius: var(--radius-sm);
    min-height: 52px;
    justify-content: center;
  }

  .bottom-nav .nav-item.active { background: transparent; }
  .bottom-nav .nav-item svg { width: 20px; height: 20px; }
}

@media (min-width: 861px) {
  .bottom-nav { display: none !important; }
}