.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  padding: 0 28px;
  height: 64px;
  background: var(--bg);
  border-bottom: 1px solid var(--border-soft);
  position: sticky;
  top: 0;
  z-index: 20;
}
.logo {
  height: 36px;
  width: auto;
  display: block;
}
.topbar-right {
  margin-left: auto;
  display: flex;
  gap: 8px;
  align-items: center;
}
.btn-sm {
  font-size: 14px;
  font-weight: 500;
  padding: 8px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  transition: background .15s, border-color .15s, color .15s;
}
.btn-sm:hover { background: var(--hover); border-color: #b8b8b8; }
.btn-primary {
  background: var(--navy);
  color: #fff;
  border-color: var(--navy);
}
.btn-primary:hover { background: #002a55; border-color: #002a55; }
#refresh-btn { width: 36px; height: 36px; padding: 0; font-size: 16px; border-radius: 50%; }

/* Filters bar */
.filters-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  padding: 14px 28px;
  background: var(--bg);
  border-bottom: 1px solid var(--border-soft);
  position: sticky;
  top: 64px;
  z-index: 19;
}
.search-box {
  padding: 9px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: 14px;
  width: 280px;
  outline: none;
  background: var(--bg);
  color: var(--fg);
}
.search-box:focus { border-color: var(--navy); }
.filter-count {
  margin-left: auto;
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
}

/* Grid */
.grid {
  padding: 24px 28px 48px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.grid-empty {
  padding: 80px 24px;
  text-align: center;
  color: var(--muted);
  font-size: 15px;
}

/* Responsive */
@media (max-width: 900px) {
  .topbar { padding: 0 16px; }
  .filters-bar { padding: 10px 16px; }
  .search-box { width: 100%; flex: 1 1 200px; }
  .grid { padding: 16px; gap: 16px; }
}
@media (max-width: 600px) {
  .grid { grid-template-columns: 1fr; }
}