:root {
  --bg: #0d1117;
  --bg-elevated: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-dim: #1f6feb;
  --danger: #f85149;
  --success: #3fb950;
  --radius: 6px;
}

* {
  box-sizing: border-box;
  scrollbar-width: none;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

header.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
  position: sticky;

  top: 0;
  z-index: 10;
}

header.topbar h1 {
  font-size: 16px;
  font-weight: 600;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

header.topbar h1::before {
  content: "◆";
  color: var(--accent);
  font-size: 14px;
}

.nav-link {
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 14px;
  font-size: 13px;
  text-decoration: none;
}
.nav-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px;
}

/* ---- category tabs ---- */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.tab {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  cursor: pointer;
}
.tab:hover {
  color: var(--text);
  border-color: var(--accent);
}
.tab.active {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
  color: #fff;
}

/* ---- feed grid: 2 per row, 1 on small screens ---- */
.feed-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
@media (max-width: 600px) {
  .feed-grid {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease;
}
.card:hover {
  border-color: var(--accent);
}

.card-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  background: #010409;
  display: block;
}
.card-img.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 28px;
}

.card-body {
  padding: 12px 14px 14px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-source {
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.35;
  margin: 0 0 6px;
}
.card-title a {
  color: var(--text);
  text-decoration: none;
}
.card-title a:hover {
  color: var(--accent);
}

.card-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0 0 10px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-date {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: auto;
}

/* ---- skeleton loading cards ---- */
.skeleton {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.skeleton .sk-img {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(90deg, #161b22 25%, #1c2128 37%, #161b22 63%);
  background-size: 400% 100%;
  animation: sk-pulse 1.4s ease infinite;
}
.skeleton .sk-body {
  padding: 12px 14px 14px;
}
.skeleton .sk-line {
  height: 10px;
  border-radius: 4px;
  margin-bottom: 8px;
  background: linear-gradient(90deg, #161b22 25%, #1c2128 37%, #161b22 63%);
  background-size: 400% 100%;
  animation: sk-pulse 1.4s ease infinite;
}
.skeleton .sk-line.short {
  width: 60%;
}
@keyframes sk-pulse {
  0% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0 50%;
  }
}

.refresh-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.refresh-btn.spinning svg {
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
.cache-note {
  font-size: 11px;
  color: var(--text-muted);
  margin: -8px 0 16px;
}

.empty-state,
.loading-state,
.error-state {
  text-align: center;
  color: var(--text-muted);
  padding: 60px 20px;
  font-size: 14px;
}
.error-state {
  color: var(--danger);
}

/* ---- control page ---- */
.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 20px;
}
.panel h2 {
  font-size: 14px;
  margin: 0 0 14px;
  color: var(--text);
}
.panel h2 .count {
  color: var(--text-muted);
  font-weight: 400;
}

.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
input[type="text"],
input[type="url"],
select {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 8px 10px;
  font-size: 13px;
  flex: 1;
  min-width: 140px;
}
input:focus,
select:focus {
  outline: 1px solid var(--accent);
  border-color: var(--accent);
}

button {
  background: var(--accent-dim);
  color: #fff;
  border: 1px solid var(--accent-dim);
  border-radius: var(--radius);
  padding: 8px 16px;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
}
button:hover {
  background: var(--accent);
  border-color: var(--accent);
}
button.btn-danger {
  background: transparent;
  border-color: var(--border);
  color: var(--danger);
}
button.btn-danger:hover {
  border-color: var(--danger);
  background: rgba(248, 81, 73, 0.1);
}
button.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text-muted);
}
button.btn-ghost:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

.feed-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.feed-row:last-child {
  border-bottom: none;
}
.feed-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.feed-name {
  font-size: 13px;
  font-weight: 500;
}
.feed-url {
  font-size: 11px;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 420px;
}
.badge {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(88, 166, 255, 0.12);
  color: var(--accent);
  margin-left: 6px;
}
.category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}
.category-header h3 {
  font-size: 13px;
  margin: 0;
  color: var(--text);
}
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--bg-elevated);
  border: 1px solid var(--success);
  color: var(--success);
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  opacity: 0;
  transform: translateY(8px);
  transition: all 0.2s ease;
  pointer-events: none;
}
.toast.show {
  opacity: 1;
  transform: translateY(0);
}