:root {
  --bg: #f7fafc;
  --surface: #fff;
  --text: #1a202c;
  --text-muted: #718096;
  --primary: #2b6cb0;
  --primary-hover: #2c5282;
  --border: #e2e8f0;
  --success: #276749;
  --danger: #c53030;
  --radius: 8px;
  --tap: 44px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  padding-bottom: env(safe-area-inset-bottom);
}

.header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1rem;
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-title {
  margin: 0 0 0.75rem 0;
  font-size: 1.25rem;
  font-weight: 700;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.nav-link {
  display: inline-block;
  padding: 0.5rem 0.75rem;
  min-height: var(--tap);
  line-height: 1.4;
  color: var(--primary);
  text-decoration: none;
  border-radius: var(--radius);
  font-weight: 500;
}

.nav-link:hover,
.nav-link:focus {
  background: var(--border);
}

.nav-link.active {
  background: var(--primary);
  color: #fff;
}

.main {
  padding: 1rem;
  max-width: 640px;
  margin: 0 auto;
}

.loading {
  color: var(--text-muted);
}

.section-title {
  margin: 0 0 0.75rem 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.card-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 0.75rem;
}

.card:last-child {
  margin-bottom: 0;
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}

.card-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.card-meta {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.card-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--tap);
  padding: 0.5rem 1rem;
  font-size: 0.9375rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  font-family: inherit;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--primary-hover);
}

.btn-secondary {
  background: var(--border);
  color: var(--text);
}

.btn-secondary:hover,
.btn-secondary:focus {
  background: #cbd5e0;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover,
.btn-danger:focus {
  background: #9b2c2c;
}

.btn-sm {
  min-height: 36px;
  padding: 0.35rem 0.75rem;
  font-size: 0.875rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.35rem;
  font-size: 0.9375rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  min-height: var(--tap);
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
}

.form-group textarea {
  min-height: 80px;
  resize: vertical;
}

.form-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.empty {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-muted);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.stat-card:hover,
.stat-card:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(43, 108, 176, 0.2);
  outline: none;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.stat-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.checklist-item:last-child {
  border-bottom: none;
}

.checklist-item-body {
  flex: 1;
  min-width: 0;
}

.checklist-item-text {
  margin: 0;
}

.checklist-target {
  color: var(--text-muted);
  font-size: 0.9em;
}

.checklist-satisfied {
  margin: 0.35rem 0 0;
  font-size: 0.9rem;
  color: var(--success);
  font-weight: 500;
}

.checklist-item-satisfied .checklist-item-text {
  color: var(--text-muted);
}

.checklist-item-actions {
  flex-shrink: 0;
  display: flex;
  gap: 0.35rem;
}

.task-done .card-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.toast {
  position: fixed;
  bottom: 1rem;
  left: 1rem;
  right: 1rem;
  max-width: 400px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  background: var(--text);
  color: #fff;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  text-align: center;
  transform: translateY(120%);
  transition: transform 0.2s;
  z-index: 100;
}

.toast.show {
  transform: translateY(0);
}

.offline-banner {
  background: #744210;
  color: #fff;
  padding: 0.5rem 1rem;
  text-align: center;
  font-size: 0.875rem;
}

.category-badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  background: var(--border);
  border-radius: 4px;
  color: var(--text-muted);
}