@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@700&family=Source+Sans+Pro:wght@300;400;600;700&display=swap');

:root {
  --navy: #1a2744;
  --gold: #c9a84c;
  --success: #1e7e5e;
  --danger: #c0392b;
  --warning: #dd6b20;
  --info: #2c7be5;
  --bg: #f4f6fb;
  --light: #f8f9fc;
  --border: #e2e8f0;
  --text: #2d3748;
  --text-muted: #718096;
  --sidebar-w: 240px;
  --header-h: 60px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Source Sans Pro', Arial, sans-serif; font-size: 14px; color: var(--text); background: var(--bg); line-height: 1.5; }

/* === AUTH === */
.auth-body { background: linear-gradient(135deg, var(--navy) 0%, #2d4a7a 100%); min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.auth-container { background: #fff; border-radius: 12px; padding: 40px; width: 100%; max-width: 420px; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.auth-logo { text-align: center; margin-bottom: 28px; }
.auth-form { margin-top: 20px; }

/* === LAYOUT === */
.app-layout { display: flex; min-height: 100vh; }
.sidebar { width: var(--sidebar-w); background: var(--navy); flex-shrink: 0; display: flex; flex-direction: column; position: fixed; top: 0; left: 0; bottom: 0; z-index: 100; overflow-y: auto; }
.sidebar-brand { padding: 20px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.sidebar-brand-name { font-family: 'Playfair Display', serif; font-size: 16px; color: #fff; }
.sidebar-brand-sub { font-size: 11px; color: rgba(255,255,255,0.4); margin-top: 2px; }
.sidebar-company { padding: 14px 20px; background: rgba(255,255,255,0.05); border-bottom: 1px solid rgba(255,255,255,0.08); font-size: 12px; color: rgba(255,255,255,0.6); }
.sidebar-company strong { display: block; color: var(--gold); font-size: 13px; }
.sidebar-nav { padding: 12px 0; flex: 1; }
.nav-section { font-size: 9px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: rgba(255,255,255,0.3); padding: 14px 20px 6px; }
.nav-item { }
.nav-link { display: flex; align-items: center; gap: 10px; padding: 9px 20px; color: rgba(255,255,255,0.65); text-decoration: none; font-size: 13px; transition: all 0.15s; }
.nav-link:hover, .nav-link.active { background: rgba(255,255,255,0.1); color: #fff; }
.nav-link.active { border-left: 3px solid var(--gold); }
.nav-link i { width: 16px; text-align: center; flex-shrink: 0; }
.nav-badge { background: var(--danger); color: #fff; font-size: 10px; font-weight: 700; padding: 1px 6px; border-radius: 9px; margin-left: auto; }
.nav-badge.warning { background: var(--warning); }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,0.08); }
.sidebar-footer a { display: flex; align-items: center; gap: 8px; color: rgba(255,255,255,0.5); text-decoration: none; font-size: 12px; padding: 5px 0; }
.sidebar-footer a:hover { color: #fff; }

.main-content { margin-left: var(--sidebar-w); min-height: 100vh; display: flex; flex-direction: column; flex: 1; }
.top-header { height: var(--header-h); background: #fff; border-bottom: 1px solid var(--border); display: flex; align-items: center; padding: 0 24px; gap: 16px; position: sticky; top: 0; z-index: 50; }
.header-title { font-family: 'Playfair Display', serif; font-size: 18px; color: var(--navy); font-weight: 700; }
.header-breadcrumb { font-size: 11px; color: var(--text-muted); margin-top: 1px; }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.header-avatar { width: 34px; height: 34px; background: var(--navy); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; color: var(--gold); font-size: 14px; cursor: pointer; }
.uk-flag-badge { font-size: 11px; background: var(--light); border: 1px solid var(--border); padding: 3px 10px; border-radius: 20px; color: var(--text-muted); }
.page-content { padding: 24px; flex: 1; }

/* === CARDS === */
.card { background: #fff; border-radius: 10px; border: 1px solid var(--border); margin-bottom: 20px; overflow: hidden; }
.card-header { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; border-bottom: 1px solid var(--border); background: #fff; flex-wrap: wrap; gap: 8px; }
.card-title { font-family: 'Playfair Display', serif; font-size: 15px; color: var(--navy); font-weight: 700; }
.card-body { padding: 20px; }
.card-footer { padding: 12px 20px; border-top: 1px solid var(--border); background: var(--light); }

/* === STATS GRID === */
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; margin-bottom: 20px; }
.stat-card { background: #fff; border-radius: 10px; padding: 18px 20px; border: 1px solid var(--border); border-top: 3px solid var(--navy); position: relative; overflow: hidden; }
.stat-card.navy { border-top-color: var(--navy); }
.stat-card.gold { border-top-color: var(--gold); }
.stat-card.success { border-top-color: var(--success); }
.stat-card.danger { border-top-color: var(--danger); }
.stat-card.warning { border-top-color: var(--warning); }
.stat-card.info { border-top-color: var(--info); }
.stat-card.secondary { border-top-color: var(--text-muted); }
.stat-label { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 1.5px; color: var(--text-muted); margin-bottom: 6px; }
.stat-value { font-size: 24px; font-weight: 700; color: var(--navy); line-height: 1; }
.stat-card.gold .stat-value { color: var(--gold); }
.stat-card.success .stat-value { color: var(--success); }
.stat-card.danger .stat-value { color: var(--danger); }
.stat-card.info .stat-value { color: var(--info); }
.stat-icon { position: absolute; right: 16px; top: 16px; font-size: 24px; opacity: 0.1; color: var(--navy); }

/* === TABLE === */
.table-responsive { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; }
.table thead tr { background: var(--navy); }
.table thead th { padding: 10px 14px; color: rgba(255,255,255,0.8); font-size: 10px; text-transform: uppercase; letter-spacing: 1px; font-weight: 700; white-space: nowrap; text-align: left; }
.table tbody tr { border-bottom: 1px solid var(--border); transition: background 0.1s; }
.table tbody tr:hover { background: var(--light); }
.table tbody td { padding: 10px 14px; font-size: 13px; vertical-align: middle; }
.table tfoot td, .table tfoot th { padding: 10px 14px; font-weight: 700; background: var(--light); }
.text-right { text-align: right !important; }
.text-center { text-align: center !important; }
.text-muted { color: var(--text-muted) !important; }
.fw-bold { font-weight: 700 !important; }
.font-mono { font-family: monospace !important; }

/* === FORMS === */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); margin-bottom: 5px; }
.form-control { width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; font-family: inherit; color: var(--text); background: #fff; transition: border-color 0.15s; }
.form-control:focus { outline: none; border-color: var(--navy); box-shadow: 0 0 0 3px rgba(26,39,68,0.08); }
.form-control[readonly] { background: var(--light); color: var(--text-muted); }
.form-row { display: grid; gap: 16px; }
.form-row-2 { grid-template-columns: 1fr 1fr; }
.form-row-3 { grid-template-columns: 1fr 1fr 1fr; }
.form-row-4 { grid-template-columns: 1fr 1fr 1fr 1fr; }
.required { color: var(--danger); }

/* === BUTTONS === */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 6px; font-size: 13px; font-weight: 600; font-family: inherit; border: 2px solid transparent; cursor: pointer; text-decoration: none; transition: all 0.15s; white-space: nowrap; }
.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 15px; }
.btn-primary { background: var(--navy); color: #fff; border-color: var(--navy); }
.btn-primary:hover { background: #243666; }
.btn-success { background: var(--success); color: #fff; border-color: var(--success); }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-warning { background: var(--warning); color: #fff; border-color: var(--warning); }
.btn-outline-primary { background: transparent; color: var(--navy); border-color: var(--navy); }
.btn-outline-primary:hover { background: var(--navy); color: #fff; }
.btn-outline-secondary { background: transparent; color: var(--text-muted); border-color: var(--border); }
.btn-outline-secondary:hover { background: var(--light); color: var(--text); }
.btn-outline-danger { background: transparent; color: var(--danger); border-color: var(--danger); }
.btn-outline-danger:hover { background: var(--danger); color: #fff; }
.btn-outline-success { background: transparent; color: var(--success); border-color: var(--success); }
.btn-outline-success:hover { background: var(--success); color: #fff; }
.actions { display: flex; gap: 4px; }

/* === BADGES === */
.badge { display: inline-block; padding: 3px 9px; border-radius: 12px; font-size: 11px; font-weight: 700; }
.badge-success { background: #d1fae5; color: var(--success); }
.badge-danger { background: #fee2e2; color: var(--danger); }
.badge-warning { background: #fef3c7; color: var(--warning); }
.badge-info { background: #dbeafe; color: var(--info); }
.badge-navy { background: #dde3ef; color: var(--navy); }
.badge-gold { background: #fef9e7; color: #b7860b; }
.badge-secondary { background: #f1f5f9; color: var(--text-muted); }
.badge-primary { background: var(--navy); color: #fff; }

/* === ALERTS === */
.alert { display: flex; align-items: flex-start; gap: 10px; padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 13px; }
.alert i { flex-shrink: 0; margin-top: 1px; }
.alert-success { background: #d1fae5; color: #065f46; border: 1px solid #6ee7b7; }
.alert-danger  { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }
.alert-warning { background: #fef3c7; color: #92400e; border: 1px solid #fcd34d; }
.alert-info    { background: #dbeafe; color: #1e40af; border: 1px solid #93c5fd; }

/* === MODALS === */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1000; align-items: center; justify-content: center; }
.modal-overlay.active { display: flex; }
.modal { background: #fff; border-radius: 12px; width: 100%; max-width: 560px; max-height: 90vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.modal-title { font-family: 'Playfair Display', serif; font-size: 16px; color: var(--navy); font-weight: 700; }
.modal-close { background: none; border: none; font-size: 22px; cursor: pointer; color: var(--text-muted); line-height: 1; }
.modal-body { padding: 20px; }
.modal-footer { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; background: var(--light); }

/* === LINE ITEMS TABLE === */
.line-items-table { width: 100%; border-collapse: collapse; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.line-items-table thead tr { background: var(--navy); }
.line-items-table thead th { padding: 9px 10px; color: rgba(255,255,255,0.8); font-size: 10px; text-transform: uppercase; letter-spacing: 1px; text-align: left; }
.line-items-table tbody tr { border-bottom: 1px solid var(--border); }
.line-items-table tbody td { padding: 6px 6px; }
.line-items-table .form-control { padding: 6px 8px; font-size: 12px; }
.remove-row { background: none; border: none; color: var(--danger); cursor: pointer; font-size: 14px; padding: 4px 8px; }

/* === INVOICE TOTALS === */
.invoice-totals { display: flex; justify-content: flex-end; padding: 16px 0 0; }
.invoice-totals-table { width: 280px; border-collapse: collapse; }
.invoice-totals-table td { padding: 6px 0; font-size: 14px; }
.invoice-totals-table td:last-child { text-align: right; font-weight: 600; }
.invoice-totals-table .total-row td { padding-top: 12px; font-size: 18px; font-weight: 700; color: var(--navy); border-top: 2px solid var(--navy); }
.invoice-meta { display: grid; grid-template-columns: repeat(auto-fit,minmax(140px,1fr)); gap: 12px; background: var(--light); padding: 14px; border-radius: 8px; margin-bottom: 16px; }
.invoice-meta-item label { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); display: block; margin-bottom: 3px; }
.invoice-meta-item span { font-size: 13px; font-weight: 600; color: var(--navy); }

/* === PAGINATION === */
.pagination { display: flex; gap: 4px; }
.page-link { padding: 6px 12px; border: 1px solid var(--border); border-radius: 5px; text-decoration: none; color: var(--text); font-size: 13px; }
.page-link.active { background: var(--navy); color: #fff; border-color: var(--navy); }
.page-link:hover:not(.active) { background: var(--light); }

/* === UTILITIES === */
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 12px; }
.mt-3 { margin-top: 16px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 12px; }
.mb-3 { margin-bottom: 16px; }

/* === PAID STAMP === */
.paid-stamp { position: absolute; top: 30px; right: 30px; border: 4px solid var(--success); color: var(--success); padding: 8px 20px; border-radius: 8px; transform: rotate(-12deg); font-size: 28px; font-weight: 900; opacity: 0.3; letter-spacing: 2px; pointer-events: none; }

/* === MOBILE === */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); transition: transform 0.3s; }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  #menu-toggle { display: block !important; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .form-row-3, .form-row-4 { grid-template-columns: 1fr; }
  .form-row-2 { grid-template-columns: 1fr; }
}

/* ===== UK DATEPICKER ===== */
.ukdp-overlay {
  position: absolute;
  z-index: 9999;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.18);
  width: 260px;
  font-family: 'Source Sans Pro', Arial, sans-serif;
  font-size: 13px;
  user-select: none;
}
.ukdp-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--navy);
  color: #fff;
  padding: 10px 12px;
  border-radius: 9px 9px 0 0;
}
.ukdp-title { font-weight: 700; font-size: 14px; }
.ukdp-nav {
  background: none; border: none; color: #fff; cursor: pointer;
  font-size: 22px; line-height: 1; padding: 0 4px; opacity: 0.8;
}
.ukdp-nav:hover { opacity: 1; }
.ukdp-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  padding: 8px;
  gap: 2px;
}
.ukdp-dayname {
  text-align: center; font-size: 10px; font-weight: 700;
  color: var(--text-muted); padding: 4px 0;
  text-transform: uppercase; letter-spacing: 0.5px;
}
.ukdp-cell {
  text-align: center; padding: 6px 2px; border-radius: 5px;
  cursor: pointer; font-size: 12px; color: var(--text);
}
.ukdp-cell:hover { background: var(--light); }
.ukdp-empty { cursor: default; }
.ukdp-today { color: var(--gold); font-weight: 700; }
.ukdp-selected { background: var(--navy) !important; color: #fff !important; font-weight: 700; }
.ukdp-footer {
  display: flex; justify-content: space-between;
  padding: 8px 10px; border-top: 1px solid var(--border);
}
.ukdp-today-btn, .ukdp-clear-btn {
  background: none; border: 1px solid var(--border); border-radius: 5px;
  padding: 4px 12px; font-size: 12px; cursor: pointer; color: var(--text-muted);
}
.ukdp-today-btn:hover { background: var(--navy); color: #fff; border-color: var(--navy); }
.ukdp-clear-btn:hover  { background: var(--danger); color: #fff; border-color: var(--danger); }