:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --border: #e2e4e9;
  --text: #1c1f26;
  --text-muted: #6b7280;
  --primary: #2f5d50;
  --primary-dark: #244a40;
  --primary-soft: #e7f0ed;
  --danger: #c0392b;
  --danger-soft: #fbeceb;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 1px 3px rgba(16, 24, 40, 0.06);
  font-size: 15px;
}

* { box-sizing: border-box; }

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

button { font-family: inherit; }

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

/* Sidebar */
.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 8px 20px;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}

.brand-title { font-weight: 700; font-size: 14.5px; }
.brand-sub { font-size: 12px; color: var(--text-muted); }

.nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
  border: none;
  background: transparent;
  color: var(--text);
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
}

.nav-item:hover { background: var(--bg); }
.nav-item.active { background: var(--primary-soft); color: var(--primary-dark); font-weight: 600; }
.nav-icon { font-size: 15px; width: 18px; text-align: center; }

.nav-divider { height: 1px; background: var(--border); margin: 10px 4px; }

.sidebar-footer { font-size: 11.5px; color: var(--text-muted); padding: 10px 8px 0; }

/* Content */
.content {
  flex: 1;
  padding: 28px 36px 60px;
  max-width: 1180px;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 22px;
  gap: 16px;
}

.page-title { font-size: 21px; font-weight: 700; margin: 0 0 4px; }
.page-sub { color: var(--text-muted); font-size: 13.5px; margin: 0; }

.header-actions { display: flex; gap: 10px; flex-shrink: 0; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
}

.btn:hover { background: var(--bg); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { color: var(--danger); border-color: var(--danger-soft); background: var(--danger-soft); }
.btn-danger:hover { background: #f6d9d6; }
.btn-ghost { border-color: transparent; background: transparent; }
.btn-ghost:hover { background: var(--bg); }
.btn-sm { padding: 6px 11px; font-size: 12.5px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* Cards / panels */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  margin-bottom: 18px;
}

.panel-title {
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Form elements */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 18px;
}

.field { display: flex; flex-direction: column; gap: 5px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 12.5px; font-weight: 600; color: var(--text-muted); }

input[type=text], input[type=number], input[type=date], input[type=email], select, textarea {
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 9px 11px;
  font-size: 13.5px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  width: 100%;
}

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

textarea { resize: vertical; min-height: 60px; }

/* Cards grid (companies / customers) */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
}

.entity-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 16px 18px;
  box-shadow: var(--shadow);
}

.entity-card h3 { margin: 0 0 4px; font-size: 14.5px; }
.entity-card .muted { color: var(--text-muted); font-size: 12.5px; margin: 2px 0; }
.entity-card .card-actions { display: flex; gap: 8px; margin-top: 12px; }

.empty-state {
  text-align: center;
  padding: 50px 20px;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: #fff;
}

/* Tables */
table.data-table { width: 100%; border-collapse: collapse; }
table.data-table th {
  text-align: left;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: .03em;
  color: var(--text-muted);
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}
table.data-table td {
  padding: 10px;
  border-bottom: 1px solid var(--border);
  font-size: 13.5px;
  vertical-align: middle;
}
table.data-table tr:last-child td { border-bottom: none; }
table.data-table tr:hover td { background: var(--bg); }

/* Line-item builder */
.section-block {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 14px;
  background: #fbfbfc;
}

.section-block-head {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
}

.section-block-head input[type=text] { flex: 1; font-weight: 600; }

.items-table { width: 100%; border-collapse: collapse; margin-bottom: 8px; }
.items-table th {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-muted);
  text-align: left;
  padding: 4px 6px;
}
.items-table td { padding: 4px 6px; }
.items-table input { font-size: 13px; }
.items-table td.amount-cell { text-align: right; font-variant-numeric: tabular-nums; padding-right: 10px; white-space: nowrap; }
.items-table th.amount-col, .items-table td.qty-col, .items-table th.qty-col { width: 90px; }
.items-table th.price-col, .items-table td.price-col { width: 120px; }
.items-table td.action-col, .items-table th.action-col { width: 34px; }

.discount-row { display: flex; gap: 8px; align-items: center; margin-top: 6px; }
.discount-row input[type=text] { flex: 1; }
.discount-row select { width: 110px; }
.discount-row input[type=number] { width: 90px; }

.section-subtotal {
  display: flex;
  justify-content: flex-end;
  gap: 24px;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
  font-size: 13.5px;
}
.section-subtotal .label { color: var(--text-muted); }
.section-subtotal .value { font-weight: 700; font-variant-numeric: tabular-nums; }

.grand-total-bar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 18px;
  padding: 16px 22px;
  background: var(--primary-soft);
  border-radius: var(--radius);
  font-size: 16px;
  margin-bottom: 18px;
}
.grand-total-bar .value { font-weight: 800; color: var(--primary-dark); font-variant-numeric: tabular-nums; }

.icon-btn {
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 15px;
  padding: 4px 6px;
  border-radius: 6px;
}
.icon-btn:hover { background: var(--danger-soft); color: var(--danger); }

.add-row-btn {
  border: 1px dashed var(--border);
  background: transparent;
  color: var(--primary-dark);
  font-size: 12.5px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 7px;
  cursor: pointer;
}
.add-row-btn:hover { background: var(--primary-soft); }

.toolbar-row {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
  align-items: center;
}

.search-input { max-width: 260px; }

.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 20px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  text-transform: uppercase;
}
.badge.quotation { background: #eef1fb; color: #3946a8; }

.toggle-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 12px;
}

.small-muted { color: var(--text-muted); font-size: 12.5px; }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(20, 22, 28, .45);
  display: flex; align-items: center; justify-content: center; z-index: 50;
}
.modal {
  background: #fff; border-radius: var(--radius); padding: 24px; width: 460px;
  max-width: 92vw; box-shadow: 0 20px 50px rgba(0,0,0,.25);
}
.modal h3 { margin-top: 0; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }

.toast {
  position: fixed; bottom: 22px; right: 22px; background: var(--primary-dark); color: #fff;
  padding: 12px 18px; border-radius: 8px; font-size: 13.5px; box-shadow: var(--shadow); z-index: 100;
}

/* Login screen */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}
.login-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px 36px;
  width: 360px;
  max-width: 90vw;
  text-align: center;
}
.login-card h1 { font-size: 19px; margin: 0 0 6px; }
.login-error {
  margin-top: 16px;
  background: var(--danger-soft);
  color: var(--danger);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 12.5px;
  text-align: left;
}
.owner-badge {
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg);
  border-radius: 20px;
  padding: 2px 8px;
}