/* ── Reset & Base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0f1117;
  --bg2:       #161b27;
  --bg3:       #1e2536;
  --border:    #2a3347;
  --accent:    #4f8ef7;
  --accent2:   #6c63ff;
  --text:      #e2e8f0;
  --text2:     #8896a8;
  --text3:     #5a6478;
  --success:   #34d399;
  --warning:   #fbbf24;
  --danger:    #f87171;
  --radius:    10px;
  --radius-sm: 6px;
  --sidebar-w: 220px;
  --header-h:  60px;
  font-size: 14px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
  min-height: 100vh;
}

/* ── Layout ───────────────────────────────────────────────────────────────── */
.app { display: flex; flex-direction: column; height: 100vh; overflow: hidden; }

.header {
  height: var(--header-h);
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 16px;
  flex-shrink: 0;
  z-index: 10;
}

.header-left { flex: 0 0 var(--sidebar-w); }
.header-center { flex: 1; max-width: 640px; }
.header-right { flex: 0 0 auto; margin-left: auto; }

.logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.3px;
}

.body-wrap {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ── Sidebar ──────────────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg2);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  flex-shrink: 0;
  padding: 12px 0;
}

.sidebar-section { margin-bottom: 4px; }

.sidebar-section-title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text3);
  padding: 10px 16px 4px;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  cursor: pointer;
  border-radius: 0;
  transition: background 0.15s;
  user-select: none;
}
.sidebar-item:hover { background: var(--bg3); }
.sidebar-item.active { background: rgba(79, 142, 247, 0.12); color: var(--accent); }
.sidebar-item.active .sidebar-count { background: rgba(79,142,247,0.2); color: var(--accent); }

.sidebar-icon { font-size: 0.9rem; opacity: 0.7; }
.sidebar-label { flex: 1; font-size: 0.85rem; }
.sidebar-count {
  font-size: 0.7rem;
  background: var(--bg3);
  color: var(--text2);
  padding: 1px 7px;
  border-radius: 20px;
  font-weight: 500;
}

.bookmarklet-wrap { padding: 8px 16px 12px; }
.bookmarklet-btn {
  display: inline-block;
  padding: 6px 12px;
  background: var(--bg3);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  color: var(--accent);
  text-decoration: none;
  font-size: 0.8rem;
  cursor: grab;
  transition: border-color 0.15s, background 0.15s;
}
.bookmarklet-btn:hover { border-color: var(--accent); background: rgba(79,142,247,0.1); }
.bookmarklet-hint { font-size: 0.7rem; color: var(--text3); margin-top: 6px; }

/* ── Main ─────────────────────────────────────────────────────────────────── */
.main {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ── URL input ────────────────────────────────────────────────────────────── */
.url-input-wrap {
  display: flex;
  gap: 8px;
}

.url-input-wrap input {
  flex: 1;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 12px;
  color: var(--text);
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.15s;
}
.url-input-wrap input:focus { border-color: var(--accent); }

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  padding: 7px 16px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: opacity 0.15s, background 0.15s;
  white-space: nowrap;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover:not(:disabled) { opacity: 0.88; }
.btn-ghost {
  background: var(--bg3);
  color: var(--text2);
  border: 1px solid var(--border);
}
.btn-ghost:hover:not(:disabled) { background: var(--border); color: var(--text); }
.btn-danger { background: var(--danger); color: #fff; }

/* ── Search bar ───────────────────────────────────────────────────────────── */
.search-bar-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.search-mode-toggle {
  display: flex;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
}
.mode-btn {
  padding: 6px 14px;
  background: transparent;
  border: none;
  color: var(--text2);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
.mode-btn.active { background: var(--accent); color: #fff; }
.mode-btn:hover:not(.active) { background: var(--border); color: var(--text); }

.search-input-wrap {
  display: flex;
  gap: 8px;
  flex: 1;
}
.search-input-wrap input {
  flex: 1;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 12px;
  color: var(--text);
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.15s;
}
.search-input-wrap input:focus { border-color: var(--accent); }

/* ── Grid ─────────────────────────────────────────────────────────────────── */
.grid-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text2);
  font-size: 0.8rem;
}
#gridTitle { font-weight: 600; color: var(--text); }

.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}

/* ── Link Card ────────────────────────────────────────────────────────────── */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
  position: relative;
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(79,142,247,0.12);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 8px;
}
.card-favicon {
  width: 18px;
  height: 18px;
  border-radius: 3px;
  flex-shrink: 0;
  object-fit: contain;
}
.card-favicon-placeholder {
  width: 18px;
  height: 18px;
  background: var(--bg3);
  border-radius: 3px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: var(--text3);
}
.card-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
  flex: 1;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.card-delete {
  opacity: 0;
  background: none;
  border: none;
  color: var(--text3);
  cursor: pointer;
  font-size: 1rem;
  padding: 2px 4px;
  border-radius: 4px;
  transition: opacity 0.15s, color 0.15s;
  flex-shrink: 0;
}
.card:hover .card-delete { opacity: 1; }
.card-delete:hover { color: var(--danger); }

.card-summary {
  font-size: 0.78rem;
  color: var(--text2);
  line-height: 1.5;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 2px;
}
.badge {
  font-size: 0.67rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.badge-article   { background: rgba(52,211,153,0.15); color: var(--success); }
.badge-video     { background: rgba(251,191,36,0.15);  color: var(--warning); }
.badge-social    { background: rgba(168,85,247,0.15);  color: #c084fc; }
.badge-tool      { background: rgba(79,142,247,0.15);  color: var(--accent); }
.badge-repo      { background: rgba(99,102,241,0.15);  color: #818cf8; }
.badge-podcast   { background: rgba(251,146,60,0.15);  color: #fb923c; }
.badge-other     { background: var(--bg3);              color: var(--text3); }
.badge-social_post { background: rgba(168,85,247,0.15); color: #c084fc; }

.card-topics {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}
.topic-tag {
  font-size: 0.68rem;
  background: var(--bg3);
  color: var(--text3);
  padding: 2px 7px;
  border-radius: 20px;
  border: 1px solid var(--border);
}
.card-date {
  font-size: 0.7rem;
  color: var(--text3);
  margin-left: auto;
}

/* Processing state */
.card.processing {
  opacity: 0.7;
  border-color: var(--border);
}
.card.processing .card-title::after {
  content: "";
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  margin-left: 6px;
  animation: pulse 1.2s ease-in-out infinite;
  vertical-align: middle;
}
.card.failed { border-color: rgba(248,113,113,0.3); }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* ── Chat ─────────────────────────────────────────────────────────────────── */
.chat-messages {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  max-height: 360px;
  overflow-y: auto;
}

.chat-msg {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.chat-msg.user { flex-direction: row-reverse; }
.chat-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem;
  flex-shrink: 0;
}
.chat-msg.user .chat-avatar   { background: var(--accent); color: #fff; }
.chat-msg.assistant .chat-avatar { background: var(--bg3); color: var(--text2); }
.chat-bubble {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.83rem;
  line-height: 1.6;
  max-width: 85%;
  color: var(--text);
}
.chat-msg.user .chat-bubble {
  background: rgba(79,142,247,0.15);
  border-color: rgba(79,142,247,0.3);
}
.chat-bubble a { color: var(--accent); }
.chat-bubble p { margin: 0; }

.chat-thinking {
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 4px 0;
}
.chat-thinking span {
  width: 6px; height: 6px;
  background: var(--text3);
  border-radius: 50%;
  animation: bounce 1.2s ease-in-out infinite;
}
.chat-thinking span:nth-child(2) { animation-delay: 0.2s; }
.chat-thinking span:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce {
  0%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-5px); }
}

/* ── Toast ────────────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-size: 0.83rem;
  color: var(--text);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  z-index: 1000;
  animation: slideIn 0.2s ease;
}
.toast.success { border-color: var(--success); color: var(--success); }
.toast.error   { border-color: var(--danger);  color: var(--danger); }
@keyframes slideIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Empty state ──────────────────────────────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 60px 20px;
  color: var(--text3);
}
.empty-icon { font-size: 2.5rem; }
.empty-text { font-size: 0.88rem; }

/* ── Load more ────────────────────────────────────────────────────────────── */
.load-more { display: flex; justify-content: center; padding: 8px 0 20px; }

/* ── Scrollbar ────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }