:root {
  --bg: #ffffff;
  --bg-muted: #f8f9fa;
  --bg-secondary: #e9ecef;
  --border: #dee2e6;
  --border-dashed: #ced4da;
  --text: #212529;
  --text-muted: #6c757d;
  --text-light: #adb5bd;
  --primary: #1a61e6;
  --primary-light: #e7f0ff;
  --success: #198754;
  --warning: #f59e0b;
  --danger: #dc3545;
  --info: #0dcaf0;
  --radius: 0.5rem;
  --radius-sm: 0.25rem;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-card: 0 2px 8px rgba(0,0,0,0.06);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --max-width: 1200px;
  --sidebar-width: 320px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg-muted);
  line-height: 1.5;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-6) var(--space-8);
}

/* Header */
.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: var(--space-4) var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary);
  text-decoration: none;
}
.site-header nav { display: flex; gap: var(--space-6); align-items: center; }
.site-header nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
}
.site-header nav a:hover { color: var(--text); }

/* Cards */
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.card-header {
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-body { padding: var(--space-6); }
.card-title { margin: 0; font-size: 1.125rem; font-weight: 600; }
.card-subtitle { margin: var(--space-1) 0 0; color: var(--text-muted); font-size: 0.875rem; }

/* Sidebar summary */
.sidebar-summary { width: var(--sidebar-width); flex-shrink: 0; }
.summary-header {
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: #fff;
  padding: var(--space-4) var(--space-5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: var(--radius) var(--radius) 0 0;
}
.summary-header .incoterm { font-weight: 700; font-size: 1.125rem; }
.summary-header .date { font-size: 0.875rem; opacity: 0.95; }
.summary-route {
  padding: var(--space-6) var(--space-5);
  text-align: center;
  border-bottom: 1px dashed var(--border-dashed);
}
.summary-route .codes {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}
.summary-route .codes .arrow {
  color: var(--text-muted);
  font-size: 1.25rem;
}
.summary-route .names {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-2);
  font-size: 0.75rem;
  color: var(--text-muted);
}
.summary-meta {
  padding: var(--space-5);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.summary-meta .meta-group h5 {
  margin: 0 0 var(--space-2);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--text-muted);
}
.summary-meta .meta-group p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.25rem;
  background: var(--bg);
  color: var(--text);
  transition: background .15s, border-color .15s, color .15s;
}
.btn:hover { background: var(--bg-secondary); }
.btn:focus { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-primary { background: var(--text); color: #fff; border-color: var(--text); }
.btn-primary:hover { background: #343a40; }
.btn-secondary { background: var(--bg-secondary); border-color: var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-ghost { background: transparent; }
.btn-ghost:hover { background: var(--bg-muted); }
.btn-outline { border-color: var(--border); background: #fff; }
.btn-outline:hover { background: var(--bg-muted); }
.btn-sm { padding: var(--space-1) var(--space-3); font-size: 0.75rem; }
.btn-lg { padding: var(--space-3) var(--space-6); font-size: 1rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1;
}
.badge-amber { background: #fffbeb; color: #92400e; }
.badge-green { background: #ecfdf5; color: #065f46; }
.badge-red { background: #fef2f2; color: #991b1b; }
.badge-cyan { background: #ecfeff; color: #155e75; }
.badge-secondary { background: var(--bg-secondary); color: var(--text-muted); }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
thead th {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
tbody td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
tbody tr:hover { background: var(--bg-muted); }
tbody tr.expanded { background: var(--bg-muted); }
tbody tr.details-row td { padding: 0; border-bottom: none; }
tbody tr.details-row .details-inner {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border);
}

/* Tabs */
.tabs { display: inline-flex; background: var(--bg-muted); border-radius: var(--radius-sm); padding: var(--space-1); gap: var(--space-1); }
.tab {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  background: transparent;
  color: var(--text-muted);
}
.tab.active { background: #fff; color: var(--text); box-shadow: var(--shadow); }
.tab:hover:not(.active) { color: var(--text); }

/* Forms */
.form-group { margin-bottom: var(--space-5); }
.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-2);
}
.form-label .required { color: var(--danger); }
.form-hint { font-size: 0.75rem; color: var(--text-muted); margin-top: var(--space-1); }
.form-control {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  background: #fff;
  color: var(--text);
}
.form-control:focus { outline: 2px solid var(--primary); outline-offset: 0; border-color: var(--primary); }
.form-control:disabled { background: var(--bg-muted); color: var(--text-light); }
.form-control::placeholder { color: var(--text-light); }
select.form-control { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%236c757d' viewBox='0 0 16 16'%3E%3Cpath d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 0.5rem center; padding-right: 2rem; }
textarea.form-control { min-height: 80px; resize: vertical; }
.form-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
.form-row-3 { grid-template-columns: repeat(3, 1fr); }
.form-row-4 { grid-template-columns: repeat(4, 1fr); }

/* Step indicator */
.steps { display: flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-8); }
.step { display: flex; align-items: center; gap: var(--space-2); text-decoration: none; color: var(--text-muted); font-size: 0.875rem; }
.step .step-num {
  width: 1.5rem; height: 1.5rem;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  font-size: 0.75rem; font-weight: 600;
  background: var(--bg-secondary); color: var(--text-muted);
}
.step.active { color: var(--text); font-weight: 600; }
.step.active .step-num { background: var(--text); color: #fff; }
.step.completed { color: var(--text); }
.step.completed .step-num { background: var(--success); color: #fff; }
.step-divider { width: 1.5rem; height: 1px; background: var(--border); }

/* Filters */
.filters { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-6); align-items: center; }
.filters .search { position: relative; }
.filters .search input { padding-left: 2rem; }
.filters .search::before {
  content: ""; position: absolute; left: 0.6rem; top: 50%; transform: translateY(-50%);
  width: 0.875rem; height: 0.875rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%236c757d' viewBox='0 0 16 16'%3E%3Cpath d='M11.742 2.344a6.5 6.5 0 1 0 1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 1-1.414 1.415l-3.85-3.85a1.007 1.007 0 0 1-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0z'/%3E%3C/svg%3E");
  background-size: contain; opacity: 0.6;
}

/* Pagination */
.pagination { display: flex; align-items: center; gap: var(--space-2); margin-top: var(--space-6); }
.pagination button { min-width: 2rem; height: 2rem; padding: 0; }
.pagination .page-info { font-size: 0.875rem; color: var(--text-muted); margin-left: auto; }

/* Modal */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.35);
  display: none; align-items: center; justify-content: center;
  z-index: 100;
}
.modal-overlay.open { display: flex; }
.modal {
  background: #fff; border-radius: var(--radius); max-width: 480px; width: 90%;
  box-shadow: 0 10px 40px rgba(0,0,0,0.15);
}
.modal-header { padding: var(--space-5) var(--space-6) 0; display: flex; justify-content: space-between; align-items: center; }
.modal-title { margin: 0; font-size: 1.125rem; font-weight: 600; }
.modal-body { padding: var(--space-4) var(--space-6); }
.modal-footer { padding: var(--space-4) var(--space-6) var(--space-5); display: flex; justify-content: flex-end; gap: var(--space-3); }

/* Layout helpers */
.two-col { display: flex; gap: var(--space-8); }
.two-col .main { flex: 1; min-width: 0; }

.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }

.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

/* Skeleton */
.skeleton {
  background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--border) 50%, var(--bg-secondary) 75%);
  background-size: 200% 100%;
  animation: skeleton 1.5s infinite;
  border-radius: var(--radius-sm);
}
@keyframes skeleton { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* Truck badge */
.truck-badge {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: 0.75rem; font-weight: 600;
  background: var(--bg-secondary); color: var(--text-muted);
}

/* Responsive */
@media (max-width: 1024px) {
  .two-col { flex-direction: column; }
  .sidebar-summary { width: 100%; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .container { padding: var(--space-4); }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .form-row, .form-row-3, .form-row-4 { grid-template-columns: 1fr; }
  .steps { overflow-x: auto; }
}