* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Noto Sans TC", "Segoe UI", sans-serif;
  background: #f6f7fb;
  color: #1f2430;
}
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  flex-wrap: wrap;
  gap: 10px;
}
.brand { font-weight: 700; font-size: 1.2rem; color: #2a6df5; text-decoration: none; }
.topbar nav { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.topbar nav a { color: #1f2430; text-decoration: none; }
.topbar nav a:hover { color: #2a6df5; }
.who { color: #6b7280; font-size: 0.9rem; }

.container { max-width: 880px; margin: 0 auto; padding: 24px 16px 60px; }

.hero { text-align: center; padding: 60px 16px; }
.hero h1 { font-size: 2rem; margin-bottom: 12px; }
.hero p { color: #4b5563; margin-bottom: 24px; }
.hero-actions { display: flex; justify-content: center; gap: 12px; }

.btn {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 8px;
  border: 1px solid #d1d5db;
  background: #fff;
  color: #1f2430;
  text-decoration: none;
  cursor: pointer;
  font-size: 0.95rem;
}
.btn:hover { border-color: #2a6df5; color: #2a6df5; }
.btn-primary { background: #2a6df5; border-color: #2a6df5; color: #fff; }
.btn-primary:hover { background: #1d5ae0; color: #fff; }
.btn-danger { background: #fff; border-color: #e23d3d; color: #e23d3d; }
.btn-danger:hover { background: #e23d3d; color: #fff; }

.auth-card { max-width: 380px; margin: 40px auto; background: #fff; padding: 28px; border-radius: 12px; box-shadow: 0 1px 4px rgba(0,0,0,0.06); }
.auth-card form { display: flex; flex-direction: column; gap: 14px; margin: 16px 0; }
.auth-card label { display: flex; flex-direction: column; gap: 6px; font-size: 0.9rem; color: #374151; }

.trip-form { background: #fff; padding: 24px; border-radius: 12px; display: flex; flex-direction: column; gap: 16px; box-shadow: 0 1px 4px rgba(0,0,0,0.06); }
.trip-form label { display: flex; flex-direction: column; gap: 6px; font-size: 0.9rem; color: #374151; }
.trip-form .row { display: flex; gap: 16px; }
.trip-form .row label { flex: 1; }

input[type=text], input[type=email], input[type=password], input[type=date], textarea {
  padding: 9px 10px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font-size: 0.95rem;
}

.trip-feed { margin-top: 40px; }
.trip-feed-top { margin-top: 24px; }
.trip-feed h2 { margin-bottom: 16px; }
.trip-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin-bottom: 32px; }
.trip-card { display: block; background: #fff; padding: 16px; border-radius: 10px; text-decoration: none; color: #1f2430; box-shadow: 0 1px 4px rgba(0,0,0,0.06); }
.trip-card:hover { box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
.trip-card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.trip-photo { display: block; width: 100%; height: 120px; object-fit: cover; border-radius: 8px; margin-bottom: 10px; }
.trip-cover { display: block; width: 100%; max-height: 260px; object-fit: cover; border-radius: 10px; margin-bottom: 14px; }
.meta { color: #6b7280; font-size: 0.85rem; margin: 0; }
.empty { color: #9ca3af; }

.trip-header { background: #fff; padding: 20px; border-radius: 12px; margin-bottom: 20px; box-shadow: 0 1px 4px rgba(0,0,0,0.06); }
.trip-header .actions { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.share-box { margin-top: 16px; display: flex; flex-direction: column; gap: 6px; }
.share-box label { font-size: 0.85rem; color: #6b7280; }
.share-box input { width: 100%; }
.badge { background: #ecfdf3; color: #0a8f45; padding: 6px 12px; border-radius: 20px; font-size: 0.9rem; }

.day-block { background: #fff; padding: 16px 18px; border-radius: 10px; margin-bottom: 14px; box-shadow: 0 1px 4px rgba(0,0,0,0.06); }
.day-block h4 { margin: 0 0 10px; }
.day-block.new-day { opacity: 0.85; border: 1px dashed #d1d5db; box-shadow: none; }
.item-list { list-style: none; padding: 0; margin: 0 0 10px; display: flex; flex-direction: column; gap: 8px; }
.item-list li { display: flex; align-items: center; gap: 10px; }
.item-list .time { color: #2a6df5; font-weight: 600; font-size: 0.85rem; min-width: 60px; }
.item-list .content { flex: 1; }
.link-btn { background: none; border: none; color: #9ca3af; cursor: pointer; font-size: 0.8rem; padding: 0; }
.link-btn:hover { color: #e23d3d; }

.add-item-form, .edit-item-form { display: flex; gap: 8px; flex-wrap: wrap; }
.add-item-form .time-input, .edit-item-form .time-input { max-width: 120px; }
.add-item-form input[type=text], .edit-item-form input[type=text] { flex: 1; min-width: 140px; }
.edit-item-form { flex: 1; }
.item-list li { flex-wrap: wrap; }

.participant-list { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.participant-list li { background: #eef2ff; padding: 6px 12px; border-radius: 16px; font-size: 0.85rem; }

.error { color: #e23d3d; font-size: 0.9rem; }

.admin-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 10px; overflow: hidden; margin-bottom: 28px; box-shadow: 0 1px 4px rgba(0,0,0,0.06); }
.admin-table th, .admin-table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid #eef0f3; font-size: 0.9rem; }
.admin-table th { background: #f6f7fb; color: #6b7280; font-weight: 600; }

form { margin: 0; }