:root {
  --accent: #f97316;
  --accent-dark: #ea580c;
  --ink: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --bg: #f6f7f9;
  --card: #ffffff;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
}

* { box-sizing: border-box; }

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

a { color: inherit; text-decoration: none; }

/* ---------- Layout ---------- */
.app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: #14181f;
  color: #cbd2dd;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar .brand {
  padding: 20px 18px;
  font-weight: 700;
  font-size: 16px;
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,.08);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar .brand span.dot { color: var(--accent); }

.sidebar nav { padding: 14px 10px; flex: 1; }

.sidebar nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 4px;
  color: #b7c0cd;
  font-weight: 500;
  transition: background .15s, color .15s;
}
.sidebar nav a:hover { background: rgba(255,255,255,.06); color: #fff; }
.sidebar nav a.active { background: var(--accent); color: #fff; }

.sidebar .sidebar-footer {
  padding: 14px 18px;
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: 12px;
  color: #8992a1;
}

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

.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar h1 { font-size: 18px; margin: 0; font-weight: 600; }
.topbar .user-chip { display:flex; align-items:center; gap:10px; font-size:13px; color: var(--muted); }
.topbar .user-chip strong { color: var(--ink); }

.content { padding: 24px; flex: 1; }

/* ---------- Cards ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 20px;
}
.card h2, .card h3 {
  margin-top: 0;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--muted);
  font-weight: 700;
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.card-header h2, .card-header h3 { margin: 0; }

/* ---------- Grid helpers ---------- */
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ---------- Stat cards ---------- */
.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.stat .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing:.04em; }
.stat .value { font-size: 26px; font-weight: 700; margin-top: 6px; }
.stat .value.accent { color: var(--accent); }

/* ---------- Forms ---------- */
label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .03em;
  color: var(--muted);
  margin-bottom: 6px;
}
.field { margin-bottom: 16px; }
input[type=text], input[type=email], input[type=password], input[type=number],
input[type=date], input[type=tel], input[type=search], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--ink);
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(249,115,22,.15);
}
textarea { resize: vertical; min-height: 80px; }

.form-actions { display: flex; gap: 10px; margin-top: 20px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, border-color .15s, transform .05s;
  text-align: center;
}
.btn:hover { background: #f3f4f6; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
.btn-danger { background: #fff; border-color: var(--danger); color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-success { background: var(--success); border-color: var(--success); color: #fff; }
.btn-sm { padding: 6px 10px; font-size: 12px; }
.btn-block { width: 100%; justify-content: center; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn-ghost:hover { background: #f3f4f6; color: var(--ink); }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
table th, table td {
  padding: 11px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 13.5px;
  white-space: nowrap;
}
table th {
  color: var(--muted);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: .04em;
  font-weight: 700;
  background: #fafafa;
}
table tbody tr:hover { background: #fafbfc; }
table td.wrap { white-space: normal; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .03em;
}
.badge-new { background:#e0e7ff; color:#4338ca; }
.badge-contacted { background:#fef3c7; color:#b45309; }
.badge-qualified { background:#dbeafe; color:#1d4ed8; }
.badge-converted { background:#dcfce7; color:#15803d; }
.badge-lost { background:#fee2e2; color:#b91c1c; }
.badge-paid { background:#dcfce7; color:#15803d; }
.badge-unpaid { background:#fef3c7; color:#b45309; }
.badge-overdue { background:#fee2e2; color:#b91c1c; }

/* ---------- Alerts ---------- */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 18px;
  font-size: 13.5px;
  border: 1px solid transparent;
}
.alert-success { background:#f0fdf4; border-color:#bbf7d0; color:#15803d; }
.alert-danger { background:#fef2f2; border-color:#fecaca; color:#b91c1c; }
.alert-info { background:#eff6ff; border-color:#bfdbfe; color:#1d4ed8; }

/* ---------- Pagination ---------- */
.pagination { display: flex; gap: 6px; margin-top: 18px; flex-wrap: wrap; }
.pagination a, .pagination span {
  padding: 7px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--ink);
}
.pagination a:hover { background: #f3f4f6; }
.pagination .active { background: var(--accent); border-color: var(--accent); color: #fff; }
.pagination .disabled { color: #c1c5cc; }

/* ---------- Search / filter bar ---------- */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.toolbar form { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.toolbar input, .toolbar select { min-width: 180px; }

/* ---------- Login page ---------- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #14181f 0%, #1f2430 100%);
  padding: 20px;
}
.login-card {
  background: #fff;
  width: 100%;
  max-width: 380px;
  border-radius: 14px;
  padding: 36px 32px;
  box-shadow: 0 20px 40px rgba(0,0,0,.25);
}
.login-card .logo {
  font-weight: 800;
  font-size: 20px;
  margin-bottom: 4px;
  text-align:center;
}
.login-card .logo span { color: var(--accent); }
.login-card p.sub { text-align:center; color: var(--muted); margin-top:0; margin-bottom: 24px; font-size: 13px;}

/* ---------- Invoice preview / print ---------- */
.invoice-box {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 900px;
  margin: 0 auto;
}
.invoice-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 3px solid var(--accent);
  padding-bottom: 18px;
  margin-bottom: 20px;
}
.invoice-head h2 { font-size: 24px; margin: 0 0 4px; color: var(--ink); text-transform:none; letter-spacing:0;}
.invoice-head .muted { color: var(--muted); font-size: 13px; }
.invoice-head .title { text-align: right; }
.invoice-head .title h3 { color: var(--accent); font-size: 22px; margin: 0; letter-spacing: .02em; text-transform: uppercase; }
.invoice-head .title .meta { color: var(--muted); font-size: 12.5px; margin-top: 6px; line-height:1.6; }

.invoice-parties { display: flex; gap: 40px; margin-bottom: 24px; flex-wrap: wrap; }
.invoice-parties .party { flex: 1; min-width: 220px; }
.invoice-parties .party h4 {
  font-size: 11.5px; text-transform: uppercase; letter-spacing:.04em; color: var(--muted); margin: 0 0 6px;
}
.invoice-parties .party strong { display:block; font-size:14px; margin-bottom:2px;}
.invoice-parties .party .lines { color: #4b5563; font-size: 13px; line-height: 1.5; }

.invoice-table th { background: var(--accent); color: #fff; }
.invoice-table td, .invoice-table th { padding: 10px 12px; }
.invoice-table td.num, .invoice-table th.num { text-align: right; }

.invoice-summary { max-width: 320px; margin-left: auto; margin-top: 16px; }
.invoice-summary .row { display: flex; justify-content: space-between; padding: 6px 0; font-size: 13.5px; color: #374151; }
.invoice-summary .row.total { border-top: 2px solid var(--accent); margin-top: 6px; padding-top: 10px; font-size: 16px; font-weight: 700; color: var(--ink); }

.invoice-words { font-style: italic; color: var(--muted); font-size: 12.5px; margin-top: 18px; }
.invoice-footer-note { text-align: center; color: #9ca3af; font-size: 11.5px; margin-top: 34px; }

/* Item row builder (add/edit invoice) */
.items-table input, .items-table select { padding: 7px 8px; font-size: 13px; }
.items-table td { vertical-align: middle; }
.items-table .amt-cell { font-weight: 600; white-space: nowrap; }
.remove-row { color: var(--danger); cursor: pointer; font-weight: 700; font-size: 16px; background:none;border:none; }

/* ---------- Responsive ---------- */
@media (max-width: 800px) {
  .sidebar { position: fixed; left: -240px; z-index: 100; transition: left .2s; }
  .sidebar.open { left: 0; }
  .content { padding: 16px; }
  .topbar { padding: 12px 16px; }
  .invoice-box { padding: 18px; }
  .invoice-parties { gap: 20px; }
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--ink);
}
@media (max-width: 800px) {
  .menu-toggle { display: inline-block; }
}

.text-muted { color: var(--muted); }
.text-right { text-align: right; }
.mb-0 { margin-bottom: 0; }
.small { font-size: 12px; }

@media print {
  .no-print { display: none !important; }
  body { background: #fff; }
  .invoice-box { border: none; box-shadow: none; padding: 0; max-width: 100%; }
  .content { padding: 0; }
}