:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1a1d21;
  --muted: #6b7280;
  --border: #e2e4e8;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --green: #16a34a;
  --green-bg: #dcfce7;
  --amber: #b45309;
  --amber-bg: #fef3c7;
  --red: #dc2626;
  --red-bg: #fee2e2;
  --gray-bg: #e5e7eb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418;
    --card: #1b1f26;
    --text: #e7e9ec;
    --muted: #9aa1ab;
    --border: #2a3038;
    --green-bg: #103820;
    --amber-bg: #3a2b08;
    --red-bg: #3d1414;
    --gray-bg: #262c34;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}
.hidden { display: none !important; }

main { max-width: 860px; margin: 0 auto; padding: 24px 16px 64px; }

header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px; gap: 12px; flex-wrap: wrap;
}
h1 { font-size: 1.5rem; margin: 0; }

.btn {
  border: 1px solid var(--border); background: var(--card); color: var(--text);
  padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 0.9rem;
}
.btn:hover { border-color: var(--primary); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { border-color: transparent; background: transparent; }
.btn:disabled { opacity: 0.55; cursor: wait; }

.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px;
}

.add-form { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.field { display: flex; flex-direction: column; gap: 4px; min-width: 140px; }
.field.grow { flex: 1 1 180px; }
.field label { font-size: 0.78rem; color: var(--muted); }
input, select {
  padding: 9px 10px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font-size: 0.95rem; width: 100%;
}
input:focus, select:focus { outline: 2px solid var(--primary); outline-offset: 0; border-color: transparent; }

.error { color: var(--red); font-size: 0.88rem; margin: 8px 2px; }

.list-toolbar {
  display: flex; justify-content: space-between; align-items: center;
  margin: 18px 2px 10px; color: var(--muted); font-size: 0.88rem;
}
.toggle { cursor: pointer; user-select: none; display: flex; gap: 6px; align-items: center; }

.shipment { margin-bottom: 12px; }
.shipment.archived { opacity: 0.6; }
.shipment-head {
  display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
}
.shipment-title { font-weight: 600; font-size: 1.05rem; }
.shipment-number {
  font-family: ui-monospace, Consolas, monospace; color: var(--muted); font-size: 0.88rem;
}
.provider-chip {
  font-size: 0.72rem; padding: 2px 8px; border-radius: 999px;
  background: var(--gray-bg); color: var(--muted); letter-spacing: 0.02em;
}
.badge {
  font-size: 0.75rem; font-weight: 600; padding: 3px 10px; border-radius: 999px;
  margin-left: auto; white-space: nowrap;
}
.badge.delivered { background: var(--green-bg); color: var(--green); }
.badge.transit   { background: var(--amber-bg); color: var(--amber); }
.badge.problem   { background: var(--red-bg); color: var(--red); }
.badge.unknown   { background: var(--gray-bg); color: var(--muted); }

.events { margin: 12px 0 0; padding: 0; list-style: none; }
.events li {
  display: grid; grid-template-columns: 150px 1fr; gap: 4px 14px;
  padding: 7px 0; border-top: 1px dashed var(--border); font-size: 0.9rem;
}
.events .when { color: var(--muted); font-variant-numeric: tabular-nums; }
.events .loc { color: var(--muted); font-size: 0.82rem; }
@media (max-width: 560px) {
  .events li { grid-template-columns: 1fr; }
}

.shipment-footer {
  display: flex; gap: 8px; margin-top: 12px; align-items: center; flex-wrap: wrap;
}
.shipment-footer .spacer { flex: 1; }
.last-checked { color: var(--muted); font-size: 0.75rem; }
.track-error { color: var(--red); font-size: 0.85rem; margin-top: 10px; }

.status-only { color: var(--muted); font-size: 0.9rem; margin-top: 10px; }

.empty { text-align: center; color: var(--muted); margin-top: 40px; }

/* gate */
.gate {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  background: var(--bg); z-index: 10; padding: 16px;
}
.gate-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 32px; width: 100%; max-width: 360px; display: flex; flex-direction: column; gap: 14px;
  text-align: center;
}
.gate-card h1 { font-size: 1.3rem; }
.gate-card p { margin: 0; color: var(--muted); font-size: 0.9rem; }
.gate-card button {
  padding: 10px; border-radius: 8px; border: none; background: var(--primary);
  color: #fff; font-size: 1rem; cursor: pointer;
}