/* Base Reset & Variables */
:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --danger: #ef4444;
  --card-bg: rgba(30, 41, 59, 0.7);
  --card-border: rgba(255, 255, 255, 0.1);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
}

.container {
  margin: 0 auto;
  padding: 1rem;
  width: 100%;
}

/* Utilities */
.space-y-6>*+* {
  margin-top: 1.5rem;
}

.space-y-4>*+* {
  margin-top: 1rem;
}

.mb-2 {
  margin-bottom: 0.5rem;
}

.mb-3 {
  margin-bottom: 0.75rem;
}

.mb-4 {
  margin-bottom: 1rem;
}

.mb-6 {
  margin-bottom: 1.5rem;
}

.mb-8 {
  margin-bottom: 2rem;
}

.mt-2 {
  margin-top: 0.5rem;
}

.px-4 {
  padding-left: 1rem;
  padding-right: 1rem;
}

.py-2 {
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}

.py-6 {
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

.text-sm {
  font-size: 0.875rem;
}

.font-bold {
  font-weight: 700;
}

.text-center {
  text-align: center;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn-header {
  background: var(--bg-secondary);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  padding: 0.5rem;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-btn-header:hover {
  color: var(--text-primary);
  background: #334155;
}

.icon-btn-header.loading svg {
  animation: spin 1s linear infinite;
}

.icon-btn-header.loading {
  pointer-events: none;
  opacity: 0.7;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

h1 {
  font-size: 1.875rem;
  background: linear-gradient(to right, #60a5fa, #a855f7);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

button {
  cursor: pointer;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--card-border);
  border-radius: 0.5rem;
  transition: all 0.2s;
}

button:hover {
  background: #334155;
}

/* Tab Bar */
.tab-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-secondary);
  padding: 0.5rem;
  border-radius: 0.75rem;
  border: 1px solid var(--card-border);
  overflow-x: auto;
}

.tab-list {
  display: flex;
  gap: 0.25rem;
  flex: 1;
  overflow-x: auto;
}

.tab-item {
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  transition: all 0.2s;
}

.tab-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.tab-item.active {
  background: var(--accent);
  color: white;
}

.add-tab-btn {
  padding: 0.5rem;
  background: transparent;
  border: 1px dashed var(--card-border);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.add-tab-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

/* Hidden Panel */
#hiddenPanel {
  display: none;
  background: rgba(30, 41, 59, 0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: 0.75rem;
  padding: 1rem;
}

#hiddenPanel.show {
  display: block;
}

.restore-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: #334155;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  cursor: pointer;
}

.restore-tag:hover {
  background: #475569;
}

/* Categories */
.category {
  background: var(--bg-secondary);
  border-radius: 0.75rem;
  overflow: hidden;
  border: 1px solid var(--card-border);
  transition: opacity 0.3s ease;
}

.category.hidden-client-side {
  display: none;
}

.category-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.03);
  cursor: pointer;
  user-select: none;
}

.category-header:hover {
  background: rgba(255, 255, 255, 0.06);
}

.cat-title {
  font-weight: 600;
  font-size: 1.125rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.category-actions {
  display: flex;
  gap: 0.5rem;
}

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.25rem;
}

.icon-btn:hover {
  color: white;
  background: transparent;
}

/* Items list */
.category-items {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  padding: 1rem;
}

.category.collapsed .category-items {
  display: none;
}

.chevron {
  transition: transform 0.2s;
}

.category.collapsed .chevron {
  transform: rotate(-90deg);
}

/* Cards */
.item-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 0.5rem;
  padding: 1rem;
  transition: transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
  color: inherit;
  display: block;
}

.item-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  border-color: rgba(96, 165, 250, 0.3);
}

.item-title {
  font-weight: 600;
  color: #60a5fa;
  margin-bottom: 0.5rem;
}

.item-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  display: block;
  overflow: visible;
}

.item-date {
  font-size: 0.75rem;
  color: #64748b;
  margin-top: 0.75rem;
  display: block;
  text-align: right;
}

/* Modals */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal.show {
  display: flex;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--card-border);
  border-radius: 1rem;
  padding: 1.5rem;
  max-width: 400px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-large {
  max-width: 600px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.close-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  padding: 0.25rem 0.5rem;
  line-height: 1;
}

.close-btn:hover {
  color: var(--text-primary);
  background: transparent;
}

.modal-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--card-border);
  border-radius: 0.5rem;
  color: var(--text-primary);
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
}

.modal-input:focus {
  outline: none;
  border-color: var(--accent);
}

.modal-actions {
  display: flex;
  gap: 0.75rem;
}

/* Buttons */
.btn {
  padding: 0.625rem 1.25rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: #334155;
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: #475569;
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover {
  background: #dc2626;
}

.btn-small {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
}

.error-text {
  color: var(--danger);
  font-size: 0.875rem;
}

/* Settings */
.settings-section {
  padding: 1rem 0;
  border-bottom: 1px solid var(--card-border);
}

.settings-section:last-child {
  border-bottom: none;
}

.hash-display {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-primary);
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--card-border);
}

.hash-display code {
  flex: 1;
  font-family: 'Fira Code', monospace;
  color: var(--accent);
  font-size: 0.875rem;
  word-break: break-all;
}

.feeds-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.feed-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-primary);
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  border: 1px solid var(--card-border);
}

.feed-item-info {
  flex: 1;
  min-width: 0;
}

.feed-item-name {
  font-size: 0.875rem;
  font-weight: 500;
}

.feed-item-url {
  font-size: 0.75rem;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.feed-item .delete-btn {
  background: transparent;
  border: none;
  color: var(--danger);
  padding: 0.25rem;
  font-size: 1rem;
}

.add-feed-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.add-feed-row .modal-input {
  flex: 1;
  min-width: 150px;
  margin-bottom: 0;
}

.add-feed-row .btn {
  flex-shrink: 0;
}

/* Context Menu */
.context-menu {
  display: none;
  position: fixed;
  background: var(--bg-secondary);
  border: 1px solid var(--card-border);
  border-radius: 0.5rem;
  padding: 0.25rem;
  z-index: 1001;
  min-width: 120px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.context-menu.show {
  display: block;
}

.context-menu-item {
  display: block;
  width: 100%;
  padding: 0.5rem 0.75rem;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 0.875rem;
  text-align: left;
  border-radius: 0.25rem;
}

.context-menu-item:hover {
  background: rgba(255, 255, 255, 0.1);
}

.text-red-400 {
  color: #f87171;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}

.empty-state svg {
  margin: 0 auto 1rem;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}