:root {
  --rss-bg: #121212;
  --rss-text: #eee;
  --rss-sidebar-bg: rgba(255, 255, 255, 0.02);
  --rss-border: rgba(255, 255, 255, 0.08);
  --rss-card-bg: rgba(255, 255, 255, 0.03);
  --rss-card-hover: rgba(255, 255, 255, 0.06);
  --rss-muted: #888;
  --rss-accent: #fff;
}

@media (prefers-color-scheme: light) {
  :root {
    --rss-bg: #fff;
    --rss-text: #222;
    --rss-sidebar-bg: #f9f9f9;
    --rss-border: #e0e0e0;
    --rss-card-bg: #f5f5f5;
    --rss-card-hover: #ebebeb;
    --rss-muted: #666;
    --rss-accent: #000;
  }
}

#rss-view {
  background-color: var(--rss-bg);
  color: var(--rss-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  height: 100vh;
}

.rss-layout {
  display: flex;
  height: 100%;
}

/* Sidebar Tree */
.rss-sidebar {
  width: 280px;
  min-width: 280px;
  background: var(--rss-sidebar-bg);
  border-right: 1px solid var(--rss-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar-header {
  padding: 30px 20px 20px;
  border-bottom: 1px solid var(--rss-border);
}

.sidebar-header h3 {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--rss-muted);
  letter-spacing: 1px;
}

.rss-tree-container {
  padding: 10px 0;
  flex-grow: 1;
}

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid var(--rss-border);
  background: var(--rss-sidebar-bg);
}

.add-feed-btn {
  width: 100%;
  padding: 10px;
  background: transparent;
  border: 1px dashed var(--rss-muted);
  color: var(--rss-muted);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s;
}

.add-feed-btn:hover {
  border-color: var(--rss-accent);
  color: var(--rss-accent);
  background: var(--rss-card-bg);
}

.tree-folder {
  display: flex;
  flex-direction: column;
}

.folder-title {
  padding: 0;
  font-size: 0.95rem;
  color: var(--rss-muted);
  cursor: pointer;
  display: flex;
  align-items: stretch;
  transition: all 0.2s;
  user-select: none;
}

.folder-title:hover .folder-label {
  color: var(--rss-accent);
}

.folder-arrow {
  padding: 10px 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--rss-muted);
  transition: all 0.2s;
}

.folder-arrow:hover {
  background: var(--rss-card-bg);
  color: var(--rss-accent);
}

.folder-arrow::before {
  content: '▶';
  font-size: 0.6rem;
  transition: transform 0.2s;
}

.tree-folder.expanded > .folder-title .folder-arrow::before {
  transform: rotate(90deg);
}

.folder-label {
  flex-grow: 1;
  padding: 10px 5px;
  display: flex;
  align-items: center;
  transition: all 0.2s;
}

.folder-label:hover {
  background: var(--rss-card-bg);
}

.folder-label.active {
  color: var(--rss-accent);
  font-weight: 500;
}

.folder-content {
  display: none;
  flex-direction: column;
}

.tree-folder.expanded .folder-content {
  display: flex;
}

.tree-leaf {
  padding: 6px 40px;
  font-size: 0.85rem;
  color: var(--rss-muted);
  cursor: pointer;
  text-decoration: none;
  display: block;
  transition: all 0.15s;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tree-leaf:hover {
  background: var(--rss-card-bg);
  color: var(--rss-text);
}

.tree-leaf.active {
  color: var(--rss-accent);
  background: var(--rss-card-hover);
  box-shadow: inset 3px 0 0 var(--rss-accent);
}

/* Content Area */
.rss-main {
  flex-grow: 1;
  overflow-y: auto;
}

.rss-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px;
}

/* Modal Styling */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: #1a1a1a;
  border: 1px solid var(--rss-border);
  width: min(90vw, 500px);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.modal-header {
  padding: 20px;
  border-bottom: 1px solid var(--rss-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 { margin: 0; font-size: 1.1rem; }

.modal-close {
  background: transparent;
  border: none;
  color: var(--rss-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

.modal-body {
  padding: 24px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-group label {
  font-size: 0.8rem;
  color: var(--rss-muted);
}

.input-group input {
  background: #222;
  border: 1px solid var(--rss-border);
  padding: 12px;
  border-radius: 8px;
  color: #fff;
  font-size: 1rem;
}

.validation-status {
  margin-top: 15px;
  font-size: 0.85rem;
  min-height: 1.2em;
}

.validation-status.error { color: #f47e7e; }
.validation-status.success { color: #82c91e; }

.modal-footer {
  padding: 20px;
  background: rgba(255, 255, 255, 0.02);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

.modal-btn {
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s;
}

.modal-btn.primary { background: #444; color: #fff; }
.modal-btn.success { background: #2f9e44; color: #fff; }
.modal-btn.warn { background: #f08c00; color: #fff; }

.modal-btn:hover { filter: brightness(1.2); }

.rss-header {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--rss-border);
  padding-bottom: 20px;
}

.log-btn:hover {
  border-color: var(--rss-muted);
  color: var(--rss-text);
}

.view-controls {
  display: flex;
  background: rgba(255, 255, 255, 0.05);
  padding: 3px;
  border-radius: 6px;
  gap: 2px;
}

.view-btn {
  background: transparent;
  border: none;
  color: #666;
  font-size: 0.7rem;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all 0.2s;
}

.view-btn:hover {
  color: #aaa;
}

.view-btn.active {
  background: var(--rss-card-hover);
  color: var(--rss-accent);
}

.rss-status {
  font-size: 0.85rem;
  color: var(--rss-muted);
  font-weight: 400;
}

.rss-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  min-height: 400px;
  align-content: start;
}

/* List View Modifier */
.rss-grid.list {
  grid-template-columns: 1fr;
  gap: 12px;
}

.rss-grid.list .feed-card {
  flex-direction: row;
  align-items: center;
  padding: 12px 20px;
  gap: 20px;
}

.rss-grid.list .feed-header {
  margin-bottom: 0;
  width: 150px;
  min-width: 150px;
}

.rss-grid.list h3 {
  font-size: 1rem;
  flex-grow: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rss-grid.list .feed-excerpt {
  display: none; /* Hide excerpt in list view for compactness */
}

.rss-grid.list .feed-date {
  margin-top: 0;
  min-width: 100px;
  text-align: right;
}

.rss-loader {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 200px;
  color: #666;
  font-style: italic;
  font-size: 1.1rem;
}

/* Sidebar Toggle Button (Mobile) */
.sidebar-toggle {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--rss-bg);
  border: 1px solid var(--rss-border);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.sidebar-toggle span,
.sidebar-toggle span::before,
.sidebar-toggle span::after {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--rss-accent);
  position: absolute;
  transition: all 0.2s;
}

.sidebar-toggle span::before { top: -6px; }
.sidebar-toggle span::after { top: 6px; }

/* Responsive Adjustments */
@media (max-width: 768px) {
  .sidebar-toggle {
    display: flex;
  }

  .rss-layout {
    position: relative;
  }

  .rss-sidebar {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 900;
    background: var(--rss-bg);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    width: 250px;
    box-shadow: 10px 0 30px rgba(0, 0, 0, 0.2);
  }

  .sidebar-open .rss-sidebar {
    transform: translateX(0);
  }

  .rss-container {
    padding: 20px;
  }

  .rss-header h2 {
    font-size: 1.5rem;
  }

  .rss-grid {
    grid-template-columns: 1fr;
  }
}
.feed-card {
  background: var(--rss-card-bg);
  border: 1px solid var(--rss-border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.2s ease, background 0.2s ease;
  text-decoration: none;
  color: inherit;
}

.feed-card:hover {
  background: var(--rss-card-hover);
  transform: translateY(-4px);
  border-color: var(--rss-muted);
}

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

.feed-card .feed-icon {
  width: 16px;
  height: 16px;
  border-radius: 2px;
  opacity: 0.8;
  flex-shrink: 0;
}

.feed-card .feed-source {
  font-size: 0.7rem;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 1px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.feed-card h3 {
  margin: 0;
  font-size: 1.1rem;
  line-height: 1.4;
  font-weight: 500;
  color: var(--rss-accent);
}

.feed-card .feed-excerpt {
  font-size: 0.9rem;
  color: #aaa;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.feed-card .feed-date {
  margin-top: auto;
  font-size: 0.8rem;
  color: #666;
}

/* Scrollbar styling */
#rss-view::-webkit-scrollbar {
  width: 8px;
}

#rss-view::-webkit-scrollbar-track {
  background: transparent;
}

#rss-view::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
}

#rss-view::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}