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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: #f4f6f9;
  color: #333;
  min-height: 100vh;
}

.container {
  max-width: 700px;
  margin: 0 auto;
  padding: 20px 16px;
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: #1a1a2e;
}

h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 14px;
  color: #444;
}

.form-card {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

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

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: #555;
  margin-bottom: 4px;
}

.form-group input[type="date"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 0.95rem;
  background: #fafafa;
  transition: border-color 0.2s;
}

.form-group input[type="date"]:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #4a90d9;
  background: #fff;
}

.form-group textarea {
  resize: vertical;
  font-family: inherit;
}

.btn-primary {
  width: 100%;
  padding: 11px;
  background: #4a90d9;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-primary:hover {
  background: #357abd;
}

.filter-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
  font-size: 0.88rem;
  color: #555;
}

.filter-bar select {
  padding: 6px 10px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 0.88rem;
  background: #fff;
}

.filter-check {
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}

.filter-check input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

#postList {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.empty-message {
  text-align: center;
  color: #aaa;
  font-size: 0.9rem;
  padding: 40px 0;
}

.post-item {
  background: #fff;
  border-radius: 10px;
  padding: 14px 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.07);
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.post-item.posted {
  opacity: 0.55;
}

.post-check {
  margin-top: 3px;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: #4a90d9;
}

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

.post-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
  flex-wrap: wrap;
}

.post-date {
  font-size: 0.85rem;
  font-weight: 700;
  color: #333;
}

.post-item.posted .post-date {
  text-decoration: line-through;
  color: #aaa;
}

.platform-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 20px;
  white-space: nowrap;
}

.badge-twitter { background: #e8f4fd; color: #1da1f2; }
.badge-instagram { background: #fce4ec; color: #e91e63; }
.badge-facebook { background: #e3f2fd; color: #1877f2; }
.badge-youtube { background: #ffebee; color: #ff0000; }
.badge-tiktok { background: #f3e5f5; color: #69c9d0; }
.badge-other { background: #f5f5f5; color: #666; }

.post-memo {
  font-size: 0.9rem;
  color: #555;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.5;
}

.post-item.posted .post-memo {
  text-decoration: line-through;
  color: #bbb;
}

.post-actions {
  flex-shrink: 0;
}

.btn-delete {
  background: none;
  border: none;
  color: #ccc;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 2px 4px;
  line-height: 1;
  transition: color 0.2s;
}

.btn-delete:hover {
  color: #e74c3c;
}

@media (max-width: 375px) {
  h1 { font-size: 1.3rem; }
  .form-card { padding: 16px; }
  .post-item { padding: 12px; }
}