:root {
  --bg: #0e1116;
  --bg-soft: #151a22;
  --panel: #1a2029;
  --panel-2: #202734;
  --ink: #e5e9f0;
  --muted: #9da8b8;
  --line: #2d3645;
  --accent: #25c59a;
  --assistant: #1b2330;
  --user: #182b3a;
  --code: #0f141b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  min-height: 100vh;
  font-family: "Space Grotesk", "Noto Sans TC", sans-serif;
  background: radial-gradient(circle at 12% -10%, #1c2f41 0%, rgba(28, 47, 65, 0) 40%), var(--bg);
}

.topbar {
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(15, 20, 29, 0.92);
  backdrop-filter: blur(8px);
}

.topbar h1 {
  margin: 0 0 10px;
  font-size: 20px;
  letter-spacing: 0.01em;
}

.path-row { display: flex; gap: 8px; }

.path-row button {
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  background: linear-gradient(135deg, #1bb78d, #0f8b6c);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
}

.path-row button:disabled {
  opacity: 0.6;
  cursor: wait;
}

#pickFolderBtn {
  background: #1a2431;
  border: 1px solid #304155;
}

.file-note {
  margin-top: 6px;
  font-size: 12px;
  color: #9fb1c7;
}

.default-path-hint {
  margin-top: 4px;
  font-size: 12px;
  color: #8ec0ff;
}

.default-path-hint code {
  background: rgba(142, 192, 255, 0.12);
  border: 1px solid rgba(142, 192, 255, 0.3);
  border-radius: 6px;
  padding: 1px 6px;
  color: #cbe3ff;
}

.import-status {
  margin-top: 8px;
  display: none;
  align-items: center;
  gap: 8px;
  color: #7de3c4;
  font-size: 13px;
}

.import-status.is-visible { display: inline-flex; }

.spinner {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid #2d6e5a;
  border-top-color: #34dbac;
  animation: spin 0.9s linear infinite;
}

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

.layout {
  display: grid;
  grid-template-columns: 350px 1fr;
  height: calc(100vh - 120px);
}

.sidebar {
  border-right: 1px solid var(--line);
  padding: 12px;
  overflow: auto;
  background: #0f141b;
}

.sidebar-title {
  font-weight: 700;
  margin-bottom: 10px;
}

.segmented-filter {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  margin-bottom: 10px;
}

.segmented-filter button {
  border: 1px solid #2f3b4d;
  border-radius: 9px;
  padding: 8px 6px;
  background: #16202b;
  color: #a8b5c5;
  font-size: 12px;
  cursor: pointer;
}

.segmented-filter button:hover {
  border-color: #4d6f96;
  color: #d8e6f8;
}

.segmented-filter button.is-active {
  border-color: #2ecba0;
  background: rgba(37, 197, 154, 0.16);
  color: #dcfff5;
}

.search-input-row {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

#filterInput {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  background: var(--panel);
  color: var(--ink);
}

#clearSearchBtn {
  border: 1px solid #314458;
  border-radius: 10px;
  background: #161f2a;
  color: #98aec8;
  padding: 0 12px;
  font-size: 12px;
  cursor: pointer;
}

#clearSearchBtn:hover {
  border-color: #3f6b9a;
  color: #d3e7ff;
}

.conversation-list { display: flex; flex-direction: column; gap: 10px; }

.project-group {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  overflow: hidden;
}

.project-header {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(120deg, #1c2633 0%, #171f2a 100%);
  display: flex;
  justify-content: space-between;
  padding: 8px 10px;
  font-weight: 600;
  color: #d7deea;
}

.project-items {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
}

.project-group.collapsed .project-items {
  display: none;
}

.conversation-row {
  display: flex;
  gap: 6px;
  align-items: stretch;
}

.conversation-item {
  flex: 1;
  min-width: 0;
  text-align: left;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 10px;
  background: var(--panel-2);
  color: var(--ink);
  cursor: pointer;
}

.conversation-item:hover,
.conversation-item.active {
  border-color: #2ecba0;
  box-shadow: inset 0 0 0 1px rgba(46, 203, 160, 0.25);
}

.conversation-title {
  font-weight: 600;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.search-snippet {
  margin-top: 6px;
  color: #9fb2c8;
  font-size: 12px;
  line-height: 1.45;
  white-space: normal;
}

.rename-conversation-btn {
  flex: 0 0 auto;
  border: 1px solid #314458;
  border-radius: 10px;
  padding: 0 10px;
  min-width: 50px;
  background: #161f2a;
  color: #98aec8;
  font-size: 12px;
  cursor: pointer;
}

.rename-conversation-btn:hover {
  border-color: #3f6b9a;
  color: #d3e7ff;
}

.chat-area {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 16px;
}

.chat-title {
  color: var(--muted);
  margin-bottom: 0;
}

.chat-toolbar {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin-bottom: 12px;
  gap: 10px;
}

.messages {
  overflow: auto;
  padding-right: 8px;
  padding-left: 8px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  max-width: 100%;
}

.chat-row.user { justify-content: flex-end; }
.chat-row.user .message-avatar { order: 2; }
.chat-row.user .message-bubble { order: 1; background: var(--user); }

.chat-row.assistant-log {
  position: relative;
  padding-left: 22px;
}

.chat-row.assistant-log::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 28px;
  bottom: -14px;
  width: 2px;
  background: linear-gradient(180deg, rgba(37, 197, 154, 0.8), rgba(37, 197, 154, 0.12));
}

.chat-row.assistant-log:last-child::before {
  display: none;
}

.chat-row.search-hit .message-bubble {
  border-color: #f1bf43;
  box-shadow: inset 0 0 0 1px rgba(241, 191, 67, 0.28);
}

.message-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #122437;
  border: 1px solid #2f4f6d;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: #88ccff;
  flex: 0 0 30px;
}

.chat-row.assistant .message-avatar {
  background: #132921;
  border-color: #36b991;
  color: #79e4c3;
}

.message-bubble {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px 12px;
  max-width: min(900px, 78vw);
  background: var(--assistant);
}

.chat-row.assistant .message-bubble {
  position: relative;
}

.chat-row.assistant-log .message-bubble {
  max-width: min(1100px, 82vw);
  background: #141a22;
  border-color: #253344;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.message-body p { margin: 0 0 10px; line-height: 1.55; }
.message-body p:last-child { margin-bottom: 0; }

.search-mark {
  background: rgba(241, 191, 67, 0.2);
  border: 1px solid rgba(241, 191, 67, 0.42);
  border-radius: 4px;
  padding: 0 2px;
  color: #ffe6a7;
}

.section-title {
  margin: 8px 0 10px;
  color: #d8e5ff;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.activity-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 6px 0;
  color: #c8d5e9;
  font-size: 15px;
}

.activity-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #35cc9f;
  flex: 0 0 8px;
}

.activity-kind {
  color: #f2f7ff;
  font-weight: 700;
}

.activity-detail {
  color: #aebcd3;
}

.todo-item {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 5px 0;
  padding-left: 16px;
}

.todo-mark {
  color: #84d8bd;
  font-weight: 700;
}

.todo-item.done .todo-text {
  color: #7f8ea5;
  text-decoration: line-through;
}

.todo-item.open .todo-text {
  color: #c5d2e6;
}

.inline-code {
  display: inline-block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.9em;
  padding: 2px 6px;
  border-radius: 6px;
  background: #111827;
  border: 1px solid #2c394f;
  color: #9dd3ff;
}

.code-shell {
  margin: 0 0 10px;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid #2b3443;
  background: #0c1017;
}

.code-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #0c1118;
  color: #b7c6dd;
  padding: 6px 8px;
  font-size: 12px;
}

.code-actions {
  display: inline-flex;
  gap: 6px;
}

.code-lang {
  text-transform: lowercase;
  letter-spacing: 0.03em;
  color: #7de3c4;
}

.copy-code-btn {
  border: 1px solid #3a475d;
  background: #192230;
  color: #dce8ff;
  border-radius: 6px;
  font-size: 12px;
  padding: 3px 8px;
  cursor: pointer;
}

.toggle-code-btn {
  border: 1px solid #3a475d;
  background: #121a26;
  color: #9fd4ff;
  border-radius: 6px;
  font-size: 12px;
  padding: 3px 8px;
  cursor: pointer;
}

.code-block {
  margin: 0;
  padding: 10px 0;
  overflow-x: auto;
  background: var(--code);
}

.code-shell.is-collapsed .code-block {
  max-height: 260px;
  overflow: hidden;
  position: relative;
}

.code-shell.is-collapsed .code-block::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 56px;
  background: linear-gradient(180deg, rgba(15, 20, 27, 0), rgba(15, 20, 27, 0.96));
}

.code-lines {
  display: block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  color: #eaf0ff;
}

.code-line {
  display: grid;
  grid-template-columns: 44px 1fr;
  align-items: start;
}

.line-no {
  text-align: right;
  color: #6f809a;
  padding-right: 10px;
  user-select: none;
}

.line-text {
  white-space: pre;
  padding-right: 14px;
}

.meta {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}

.collapsed-message .message-body {
  max-height: 220px;
  overflow: hidden;
  position: relative;
}

.collapsed-message .message-body::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 44px;
  background: linear-gradient(180deg, rgba(24, 43, 58, 0), rgba(24, 43, 58, 0.95));
}

.toggle-message-btn {
  margin-top: 8px;
  border: 1px solid #3a4a61;
  background: #142334;
  color: #dce8ff;
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 12px;
  cursor: pointer;
}

.empty-state {
  border: 1px dashed #365066;
  border-radius: 12px;
  padding: 14px;
  color: var(--muted);
  background: rgba(20, 27, 36, 0.7);
}

.floating-jump-controls {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 35;
  display: inline-flex;
  flex-direction: column;
  gap: 8px;
}

.floating-jump-controls button {
  width: 40px;
  height: 40px;
  border: 1px solid #3a4a61;
  background: #132133;
  color: #dce8ff;
  border-radius: 999px;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
}

.floating-jump-controls button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.code-modal {
  position: fixed;
  inset: 0;
  display: none;
  z-index: 50;
}

.code-modal.is-open {
  display: block;
}

.code-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 5, 10, 0.72);
}

.code-modal-panel {
  position: absolute;
  inset: 6vh 6vw;
  background: #0b1119;
  border: 1px solid #334158;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.code-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  border-bottom: 1px solid #2d3a4f;
  background: #101824;
}

#closeCodeModalBtn {
  border: 1px solid #40536f;
  background: #172335;
  color: #d8e8ff;
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
}

.code-modal-body {
  margin: 0;
  padding: 14px;
  overflow: auto;
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  line-height: 1.55;
  color: #eaf0ff;
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
    height: auto;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    max-height: 45vh;
  }

  .chat-area {
    min-height: 54vh;
  }

  .message-bubble {
    max-width: 100%;
  }

  .chat-row.assistant-log::before {
    display: none;
  }

  .floating-jump-controls {
    right: 10px;
    bottom: 10px;
  }
}