* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: #f0f4f8;
  color: #333;
  min-height: 100vh;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 16px;
}

h1 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #1e40af;
  margin-bottom: 16px;
  text-align: center;
  letter-spacing: 0.02em;
}

.form-card {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
  margin-bottom: 16px;
}

.form-group {
  margin-bottom: 12px;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: #555;
  margin-bottom: 4px;
}

.form-group input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 0.95rem;
  color: #333;
  transition: border-color 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: #3b82f6;
}

.btn-primary {
  width: 100%;
  padding: 11px;
  background: #3b82f6;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-primary:hover {
  background: #2563eb;
}

.filter-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.filter-btn {
  padding: 6px 14px;
  border: 1px solid #d1d5db;
  border-radius: 20px;
  background: #fff;
  font-size: 0.85rem;
  cursor: pointer;
  color: #555;
  transition: all 0.2s;
}

.filter-btn.active {
  background: #3b82f6;
  border-color: #3b82f6;
  color: #fff;
}

.item-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.item {
  background: #fff;
  border-radius: 10px;
  padding: 14px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.07);
  display: flex;
  align-items: flex-start;
  gap: 12px;
  transition: opacity 0.2s;
}

.item.done {
  opacity: 0.55;
}

.item.done .item-subject {
  text-decoration: line-through;
  color: #888;
}

.item-check {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  cursor: pointer;
  accent-color: #3b82f6;
  margin-top: 2px;
}

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

.item-subject {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
  word-break: break-word;
}

.item-meta {
  font-size: 0.78rem;
  color: #6b7280;
}

.item-memo {
  font-size: 0.82rem;
  color: #9ca3af;
  margin-top: 4px;
  font-style: italic;
  word-break: break-word;
}

.status-badge {
  display: inline-block;
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 10px;
  margin-left: 6px;
  font-weight: 600;
}

.status-badge.pending {
  background: #fef3c7;
  color: #b45309;
}

.status-badge.done {
  background: #d1fae5;
  color: #065f46;
}

.btn-delete {
  flex-shrink: 0;
  background: none;
  border: none;
  color: #d1d5db;
  font-size: 1.1rem;
  cursor: pointer;
  padding: 2px 4px;
  line-height: 1;
  transition: color 0.2s;
}

.btn-delete:hover {
  color: #ef4444;
}

.empty-msg {
  text-align: center;
  color: #9ca3af;
  font-size: 0.9rem;
  padding: 32px 0;
  display: none;
}

.empty-msg.visible {
  display: block;
}

@media (max-width: 400px) {
  h1 {
    font-size: 1.2rem;
  }
  .item-subject {
    font-size: 0.9rem;
  }
}