:root {
  --navy: #1e1b3a;
  --navy-light: #2c2856;
  --purple: #7c3aed;
  --pink: #db2777;
  --bg: #f4f4f8;
  --card: #ffffff;
  --border: #e2e0ec;
  --text: #211f33;
  --text-muted: #6b6880;
  --danger: #dc2626;
  --success: #16a34a;
  --warning: #d97706;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

a { color: var(--purple); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: linear-gradient(180deg, var(--navy), var(--navy-light));
  color: #fff;
  padding: 24px 0;
}

.sidebar-backdrop { display: none; }

.menu-toggle {
  display: none;
  background: none; border: none; cursor: pointer;
  padding: 6px; margin-right: 6px; border-radius: 6px;
  color: var(--text);
}
.menu-toggle svg { width: 22px; height: 22px; display: block; }
.menu-toggle:hover { background: var(--bg); }

.sidebar .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px 24px;
  font-weight: 700;
  font-size: 16px;
}

.brand-badge {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--purple);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  overflow: hidden;
}
.brand-badge img { width: 100%; height: 100%; object-fit: cover; }

.sidebar nav a {
  display: block;
  color: #d8d5f0;
  padding: 10px 20px;
  font-size: 14px;
  border-left: 3px solid transparent;
}
.sidebar nav a:hover { background: rgba(255,255,255,0.06); text-decoration: none; }
.sidebar nav a.active {
  color: #fff;
  border-left-color: var(--pink);
  background: rgba(255,255,255,0.08);
}

.main { flex: 1; min-width: 0; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 28px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  gap: 12px;
}
.topbar form { margin: 0; flex-shrink: 0; }
.topbar button.link-btn {
  background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 14px;
  white-space: nowrap;
}
.topbar button.link-btn:hover { color: var(--danger); }
.topbar > div:first-child { min-width: 0; overflow: hidden; }
.topbar strong, .topbar > div:first-child > div:last-child {
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: block;
}

.content { padding: 28px; }

.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; flex-wrap: wrap; gap: 12px; }
.page-header h1 { margin: 0; font-size: 22px; }
.page-header .sub { color: var(--text-muted); font-size: 13px; margin-top: 4px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
}

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-top: 3px solid var(--purple);
  border-radius: 10px;
  padding: 16px 18px;
}
.stat-card .label { color: var(--text-muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.stat-card .value { font-size: 24px; font-weight: 700; margin-top: 6px; }
.stat-card.pink { border-top-color: var(--pink); }
.stat-card.navy { border-top-color: var(--navy); }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 13.5px; }
thead th { color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
tbody tr:hover { background: #faf9fd; }

.badge {
  display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: #ece9fb; color: var(--purple);
}
.badge.draft { background: #eee; color: #555; }
.badge.sent { background: #e0e7ff; color: #4338ca; }
.badge.accepted, .badge.paid, .badge.issued { background: #dcfce7; color: var(--success); }
.badge.declined, .badge.cancelled { background: #fee2e2; color: var(--danger); }
.badge.converted { background: #ede9fe; color: var(--purple); }
.badge.overdue { background: #fef3c7; color: var(--warning); }
.badge.partially_paid { background: #dbeafe; color: #1d4ed8; }

.btn {
  display: inline-block;
  padding: 9px 16px;
  border-radius: 7px;
  border: 1px solid transparent;
  background: var(--purple);
  color: #fff;
  cursor: pointer;
  font-size: 13.5px;
  font-weight: 600;
}
.btn:hover { background: #6d28d9; text-decoration: none; color: #fff; }
.btn.secondary { background: #fff; color: var(--text); border-color: var(--border); }
.btn.secondary:hover { background: #f7f6fb; }
.btn.danger { background: var(--danger); }
.btn.danger:hover { background: #b91c1c; }
.btn.pink { background: var(--pink); }
.btn.pink:hover { background: #be185d; }
.btn.small { padding: 5px 11px; font-size: 12.5px; }

.btn-row { display: flex; gap: 10px; flex-wrap: wrap; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 13px; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }

input[type=text], input[type=email], input[type=password], input[type=number], input[type=date], input[type=file],
select, textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 13.5px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
textarea { resize: vertical; min-height: 70px; }
input:focus, select:focus, textarea:focus { outline: 2px solid #d9cdfb; border-color: var(--purple); }

.help-text { color: var(--text-muted); font-size: 12px; margin-top: 4px; }
.error-text { color: var(--danger); font-size: 12px; margin-top: 4px; }

.badge.saved { font-size: 11px; padding: 2px 8px; }
input.credential-saved { border-color: #86e0a8; background: #f6fdf9; }
input.credential-saved::placeholder { color: #16a34a; opacity: .75; }

.filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; align-items: end; }
.filters .form-group { margin-bottom: 0; min-width: 160px; }

.section-title { font-size: 15px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; margin: 24px 0 12px; }
.section-title:first-of-type { margin-top: 0; }
.board-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin-bottom: 8px; }
.board-tile {
  display: block; background: var(--card); border: 1px solid var(--border); border-top: 3px solid var(--purple);
  border-radius: 10px; padding: 16px 18px; color: var(--text); text-decoration: none;
}
.board-tile:hover { border-color: var(--purple); text-decoration: none; box-shadow: 0 2px 10px rgba(0,0,0,0.06); }
.board-tile-title { font-weight: 700; margin-bottom: 8px; }
.board-tile-meta { font-size: 12.5px; color: var(--text-muted); display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.modal-backdrop { display: none; position: fixed; inset: 0; background: rgba(20,17,40,0.5); z-index: 100; align-items: center; justify-content: center; padding: 16px; }
.modal-backdrop.open { display: flex; }
.modal { background: #fff; border-radius: 12px; padding: 22px; width: 100%; max-width: 420px; max-height: 90vh; overflow-y: auto; }
.modal h3 { margin: 0 0 16px; }

.items-table input { padding: 7px 9px; }
.items-table td { vertical-align: top; }
.items-table .amount-cell { white-space: nowrap; font-weight: 600; }
.remove-row-btn { background: none; border: none; color: var(--danger); cursor: pointer; font-size: 18px; line-height: 1; }

.totals-box { max-width: 320px; margin-left: auto; }
.totals-box .row { display: flex; justify-content: space-between; padding: 6px 0; font-size: 13.5px; }
.totals-box .row.total { font-weight: 700; font-size: 16px; border-top: 2px solid var(--navy); margin-top: 6px; padding-top: 10px; }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 18px; font-size: 13.5px; }
.alert.success { background: #dcfce7; color: #166534; }
.alert.error { background: #fee2e2; color: #991b1b; }

.empty-state { text-align: center; padding: 40px 20px; color: var(--text-muted); }

.login-wrap { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: var(--navy); padding: 20px; }
.login-card { background: #fff; padding: 36px; border-radius: 12px; width: 100%; max-width: 380px; }
.login-card h1 { font-size: 20px; margin-top: 0; }
.login-badge { width: 52px; height: 52px; border-radius: 50%; background: var(--purple); color: #fff; display:flex; align-items:center; justify-content:center; font-weight:700; font-size: 20px; margin-bottom: 16px; }

.pagination-wrap { margin-top: 16px; }
.pagination-wrap nav { display: flex; }
.pagination-wrap ul { list-style: none; display: flex; gap: 4px; padding: 0; margin: 0; }
.pagination-wrap span, .pagination-wrap a { padding: 6px 11px; border-radius: 6px; border: 1px solid var(--border); font-size: 13px; color: var(--text); }
.pagination-wrap a:hover { background: #f7f6fb; text-decoration: none; }
.pagination-wrap .active span { background: var(--purple); color: #fff; border-color: var(--purple); }

.doc-meta { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 20px; }
.doc-meta .item .label { color: var(--text-muted); font-size: 12px; text-transform: uppercase; }
.doc-meta .item .value { font-size: 14.5px; font-weight: 600; margin-top: 2px; }

.lineage { font-size: 13px; color: var(--text-muted); margin-bottom: 10px; }

.table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table-responsive table { min-width: 560px; }

/* ---------- Mobile ---------- */
@media (max-width: 900px) {
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }

  .sidebar {
    position: fixed;
    top: 0; bottom: 0; left: 0;
    width: 240px;
    max-width: 82vw;
    z-index: 60;
    transform: translateX(-100%);
    transition: transform .22s ease;
    overflow-y: auto;
  }
  .sidebar.open { transform: translateX(0); }

  .sidebar-backdrop {
    display: none;
    position: fixed; inset: 0;
    background: rgba(20, 17, 40, .5);
    z-index: 55;
  }
  .sidebar-backdrop.open { display: block; }

  .main { width: 100%; }

  .topbar { padding: 12px 16px; }
  .content { padding: 16px; }

  .page-header h1 { font-size: 19px; }

  .card { padding: 16px; }

  .stat-grid { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
  .stat-card .value { font-size: 20px; }

  .filters { flex-direction: column; align-items: stretch; }
  .filters .form-group { min-width: 0; }
  .filters .btn { width: 100%; }

  .totals-box { max-width: none; }

  .login-card { padding: 26px 22px; }
}

@media (max-width: 480px) {
  .btn-row .btn { flex: 1 1 auto; text-align: center; }
}