/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #ffffff;
  --text-primary: #111111;
  --text-secondary: #777777;
  --border-color: #eeeeee;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #000000;
    --text-primary: #ffffff;
    --text-secondary: #888888;
    --border-color: #222222;
  }
}

body {
  font-family: var(--font-sans);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 700px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Header */
.header {
  margin-bottom: 2rem;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.header-nav {
  display: flex;
  gap: 1rem;
}

.nav-link {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
}

.nav-link.active,
.nav-link:hover {
  color: var(--text-primary);
}

.logo {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-secondary);
  text-decoration: none;
}

.search-container {
  flex: 1;
  max-width: 240px;
}

.search-input {
  width: 100%;
  padding: 0.25rem 0;
  border: none;
  border-bottom: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-primary);
  font-size: 0.85rem;
  transition: border-color 0.2s;
}

.search-input:focus {
  outline: none;
  border-color: var(--text-primary);
}

/* Nav */
.sub-nav {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2rem;
  font-size: 0.8rem;
}

.nav-tabs {
  display: flex;
  gap: 1rem;
}

.nav-tab {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
}

.nav-tab.active {
  color: var(--text-primary);
  font-weight: 600;
}

.nav-tools {
  display: flex;
  gap: 1rem;
}

.minimal-select {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 0;
}

/* Stats */
.stats-bar {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  text-transform: uppercase;
}

/* List */
.bookmarks-grid {
  display: flex;
  flex-direction: column;
}

.bookmark-card {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border-color);
  position: relative;
}

.bookmark-card:last-child {
  border-bottom: none;
}

.bookmark-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  display: inline-block;
  margin-bottom: 0.25rem;
}

.bookmark-title:hover {
  text-decoration: underline;
}

.bookmark-description {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.bookmark-metadata {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.7rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.bookmark-tags {
  display: flex;
  gap: 0.5rem;
}

.tag {
  color: var(--text-secondary);
  opacity: 0.7;
}

.tag::before { content: '#'; }

.favorite-btn {
  position: absolute;
  right: 0;
  top: 1.35rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.1s;
}

.bookmark-card:hover .favorite-btn,
.favorite-btn.active {
  opacity: 1;
}

.favorite-btn.active {
  color: var(--text-primary);
}

/* Footer */
.footer {
  margin-top: 5rem;
  padding: 2rem 0;
  border-top: 1px solid var(--border-color);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.footer a {
  color: var(--text-primary);
  text-decoration: none;
}

.footer kbd {
  font-family: var(--font-mono);
  opacity: 0.5;
}

.hidden { display: none !important; }

.loading {
  padding: 4rem 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.loading-spinner {
  width: 16px;
  height: 16px;
  border: 1px solid var(--border-color);
  border-top-color: var(--text-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Load More Button */
.load-more-btn {
  display: block;
  width: 100%;
  padding: 1rem;
  margin-top: 1rem;
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.load-more-btn:hover,
.load-more-btn:focus-visible {
  color: var(--text-primary);
  border-color: var(--text-primary);
  outline: none;
}