:root {
  --bg: #f7f8fa;
  --bg-card: #ffffff;
  --fg: #1a1c20;
  --fg-muted: #6b7280;
  --accent: #0a3d62;
  --accent-soft: #d6eaf8;
  --critical: #c0392b;
  --critical-bg: #fdecea;
  --expensive: #b7791f;
  --expensive-bg: #fef5e7;
  --cold: #2980b9;
  --cold-bg: #ebf5fb;
  --done: #27ae60;
  --border: #e5e7eb;
  --topbar-h: 56px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1116;
    --bg-card: #161b22;
    --fg: #e6edf3;
    --fg-muted: #8b949e;
    --accent: #4a90d9;
    --accent-soft: #1a2a3a;
    --critical: #ff6b5b;
    --critical-bg: #3a1410;
    --expensive: #f5b452;
    --expensive-bg: #3a2a10;
    --cold: #5dade2;
    --cold-bg: #102a3a;
    --done: #58d68d;
    --border: #30363d;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font: 16px/1.4 -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}
input, button, textarea { font: inherit; color: inherit; }

.muted { color: var(--fg-muted); }
.error { color: var(--critical); min-height: 1.4em; }

/* === Login === */
.login {
  max-width: 400px; margin: 0 auto; padding: 40px 20px;
}
.login h1 { font-size: 32px; margin: 60px 0 8px; }
.login form { display: flex; flex-direction: column; gap: 12px; margin-top: 30px; }
.login input {
  padding: 14px 16px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg-card); font-size: 17px;
}
.login button {
  padding: 14px; background: var(--accent); color: white;
  border: 0; border-radius: 10px; font-size: 17px; font-weight: 600;
  cursor: pointer;
}

/* === Topbar === */
.topbar {
  position: sticky; top: 0; z-index: 10;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 12px;
  padding: 0 16px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}
.topbar h1 {
  font-size: 18px; font-weight: 600; margin: 0;
  flex: 1; min-width: 0;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.topbar button.ghost {
  background: transparent; border: 0; padding: 8px 12px;
  font-size: 22px; cursor: pointer; color: var(--fg);
  border-radius: 8px;
}
.topbar button.ghost:hover { background: var(--accent-soft); }
.progress {
  font-size: 13px; color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
  padding: 4px 8px; background: var(--bg); border-radius: 8px;
}
.progress.complete { color: var(--done); font-weight: 600; }

/* === Trip list === */
.trips { padding: 16px; max-width: 700px; margin: 0 auto; }
.trip-card {
  display: block; padding: 16px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 12px; margin-bottom: 12px;
  text-decoration: none; color: inherit;
  cursor: pointer;
}
.trip-card h2 { margin: 0 0 6px; font-size: 18px; }
.trip-card .meta { color: var(--fg-muted); font-size: 14px; }
.trip-card.upcoming { border-left: 4px solid var(--accent); }
.trip-card.imminent { border-left: 4px solid var(--critical); background: var(--critical-bg); }

/* === Filters === */
.filters {
  display: flex; gap: 8px; padding: 12px 16px;
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  background: var(--bg);
  position: sticky; top: var(--topbar-h); z-index: 9;
  border-bottom: 1px solid var(--border);
}
.filters button {
  flex-shrink: 0; padding: 8px 14px;
  border: 1px solid var(--border); background: var(--bg-card);
  border-radius: 999px; font-size: 14px; cursor: pointer; color: var(--fg);
}
.filters button.active {
  background: var(--accent); color: white; border-color: var(--accent);
}

/* === Trip detail === */
.trip-detail { max-width: 700px; margin: 0 auto; padding: 8px 0 80px; }

.list-section {
  background: var(--bg-card);
  border-radius: 0;
  margin: 0 0 4px;
  border-bottom: 1px solid var(--border);
}
@media (min-width: 540px) {
  .list-section { margin: 12px 16px; border-radius: 12px; border: 1px solid var(--border); }
}
.list-header {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px; cursor: pointer;
  background: linear-gradient(0deg, transparent, transparent);
  user-select: none;
}
.list-header h2 { margin: 0; font-size: 16px; flex: 1; font-weight: 600; }
.list-header .count {
  font-size: 13px; color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
}
.list-header .chev { color: var(--fg-muted); transition: transform 0.2s; }
.list-section.collapsed .chev { transform: rotate(-90deg); }
.list-section.collapsed .items { display: none; }

.items { padding: 0 0 8px; }

.item {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 10px 16px; min-height: 44px;
  border-top: 1px solid var(--border);
  cursor: pointer;
  user-select: none;
}
.item:first-child { border-top: 0; }
.item.indent-1 { padding-left: 40px; }
.item.indent-2 { padding-left: 64px; }

.item .checkbox {
  flex-shrink: 0; width: 24px; height: 24px;
  border: 2px solid var(--border); border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  margin-top: 1px;
  transition: background 0.15s, border-color 0.15s;
}
.item.done .checkbox { background: var(--done); border-color: var(--done); }
.item.done .checkbox::after { content: '✓'; color: white; font-weight: 700; font-size: 16px; }

.item .text { flex: 1; min-width: 0; word-wrap: break-word; }
.item.done .text { text-decoration: line-through; color: var(--fg-muted); }

.item .meta { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 4px; }
.item .badge {
  font-size: 11px; padding: 2px 6px; border-radius: 4px;
  background: var(--accent-soft); color: var(--accent);
  font-weight: 600;
}
.item.criticality-critical { background: linear-gradient(90deg, var(--critical-bg) 0, transparent 60%); }
.item.criticality-critical .text::before { content: '⚠️ '; }
.item.criticality-expensive .text::before { content: '💰 '; }
.item.criticality-cold_chain { background: linear-gradient(90deg, var(--cold-bg) 0, transparent 60%); }
.item.criticality-cold_chain .text::before { content: '🧊 '; }
.item.criticality-prep_critical .text::before { content: '⚠️ '; }
.item.criticality-prep_critical { background: linear-gradient(90deg, var(--critical-bg) 0, transparent 60%); }

.item .due {
  font-size: 11px; padding: 2px 6px; border-radius: 4px;
  background: var(--bg); color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
}
.item .due.overdue { background: var(--critical-bg); color: var(--critical); font-weight: 600; }
.item .due.today { background: var(--expensive-bg); color: var(--expensive); font-weight: 600; }

.item .done-by {
  font-size: 11px; color: var(--fg-muted);
  font-style: italic;
}

/* Add item (quick) */
.list-section .add-row {
  display: flex; gap: 8px; padding: 10px 16px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.list-section .add-row input {
  flex: 1; padding: 8px 12px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg-card);
}
.list-section .add-row button {
  padding: 8px 14px; background: var(--accent); color: white;
  border: 0; border-radius: 8px; cursor: pointer; font-weight: 600;
}

.empty {
  padding: 60px 24px; text-align: center; color: var(--fg-muted);
}

/* === Documents === */
.docs-section {
  margin: 12px 0 16px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}
@media (min-width: 540px) {
  .docs-section { margin: 12px 16px; border-radius: 12px; border: 1px solid var(--border); }
}
.docs-section .docs-header {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.docs-section .docs-header h2 { margin: 0; flex: 1; font-size: 16px; font-weight: 600; }
.docs-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px; padding: 12px;
}
.doc-card {
  display: flex; flex-direction: column; gap: 4px;
  padding: 10px; min-height: 90px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; cursor: pointer; text-decoration: none; color: inherit;
  position: relative;
}
.doc-card:active { transform: scale(0.98); }
.doc-card .doc-icon { font-size: 28px; line-height: 1; }
.doc-card .doc-name {
  font-size: 13px; font-weight: 600;
  overflow: hidden; text-overflow: ellipsis; -webkit-line-clamp: 2;
  display: -webkit-box; -webkit-box-orient: vertical;
}
.doc-card .doc-meta {
  font-size: 11px; color: var(--fg-muted);
  display: flex; gap: 6px; flex-wrap: wrap;
  margin-top: auto;
}
.doc-card.global { border-color: var(--accent); }
.doc-card .global-tag {
  position: absolute; top: 4px; right: 4px;
  font-size: 10px; padding: 2px 5px;
  background: var(--accent); color: white; border-radius: 4px;
  font-weight: 600;
}

.doc-add {
  display: flex; align-items: center; justify-content: center;
  border: 2px dashed var(--border); background: transparent;
  font-size: 28px; color: var(--accent); cursor: pointer;
  border-radius: 8px; min-height: 90px;
}
.doc-add:hover { border-color: var(--accent); background: var(--accent-soft); }

/* Item attachments inline */
.item-attachments {
  display: flex; gap: 4px; flex-wrap: wrap; margin-top: 6px;
}
.item-attachment {
  font-size: 11px; padding: 2px 6px; border-radius: 4px;
  background: var(--accent-soft); color: var(--accent);
  text-decoration: none;
}

/* === Modal === */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  display: flex; align-items: flex-end; justify-content: center;
  z-index: 100; backdrop-filter: blur(4px);
}
@media (min-width: 540px) {
  .modal-backdrop { align-items: center; }
}
.modal {
  background: var(--bg-card);
  width: 100%; max-width: 500px;
  max-height: 90vh; overflow-y: auto;
  border-radius: 16px 16px 0 0;
  padding: 16px;
  padding-bottom: max(16px, env(safe-area-inset-bottom));
}
@media (min-width: 540px) {
  .modal { border-radius: 16px; max-height: 80vh; }
}
.modal header {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 12px;
}
.modal header h2 { margin: 0; flex: 1; font-size: 18px; }
.modal header .close-btn {
  background: transparent; border: 0; font-size: 22px;
  cursor: pointer; color: var(--fg-muted);
  padding: 4px 10px; border-radius: 6px;
}
.modal label {
  display: flex; flex-direction: column; gap: 4px;
  margin-bottom: 12px; font-size: 13px; color: var(--fg-muted);
}
.modal input[type="text"],
.modal input[type="file"],
.modal select,
.modal textarea {
  padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--fg);
  font-size: 16px;
}
.modal .checkbox-label {
  flex-direction: row; align-items: center; gap: 10px;
  font-size: 14px; color: var(--fg);
}
.modal .checkbox-label input { width: auto; }
.modal-actions {
  display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px;
}
.modal-actions button {
  padding: 12px 18px; border-radius: 8px;
  border: 0; cursor: pointer; font-weight: 600; font-size: 15px;
}
.modal-actions button.primary {
  background: var(--accent); color: white;
}
.modal-actions button.ghost {
  background: var(--bg); color: var(--fg);
  border: 1px solid var(--border);
}
.modal progress {
  width: 100%; margin-top: 8px;
}