:root {
  --bg:        #0f1216;
  --panel:     #161b22;
  --panel-2:   #1c232c;
  --line:      #262d38;
  --text:      #e4e8ee;
  --muted:     #8b95a5;
  --accent:    #6ea8fe;
  --accent-dim:#2a3d5c;
  --good:      #4ec9a0;
  --warn:      #e0b24c;
  --bad:       #e06c6c;
  --radius:    12px;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.65 "Noto Sans TC", "Microsoft JhengHei", "PingFang TC", system-ui, sans-serif;
}

/* ── 頂列 ───────────────────────────────────────────── */

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  flex: none;
}

.brand { display: flex; align-items: center; gap: 8px; }

.quota {
  font-size: 11.5px;
  color: var(--muted);
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 9px;
  white-space: nowrap;
  cursor: help;
}
.notice {
  color: var(--warn);
  background: rgba(224,178,76,.08);
  border: 1px solid rgba(224,178,76,.35);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
  margin: 6px 0;
}
.notice.quota-hit { color: var(--bad); background: rgba(224,108,108,.08); border-color: rgba(224,108,108,.4); }
.quota.warn { color: var(--warn); border-color: var(--warn); }
.quota.bad  { color: var(--bad);  border-color: var(--bad); }

.dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--muted);
  transition: background .3s;
}
.dot.on   { background: var(--good); box-shadow: 0 0 8px rgba(78,201,160,.6); }
.dot.busy { background: var(--warn); animation: pulse 1s infinite; }
.dot.err  { background: var(--bad); }

@keyframes pulse { 50% { opacity: .3; } }

.meta {
  flex: 1;
  color: var(--muted);
  font-size: 12.5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ghost {
  background: none;
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 5px 11px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 12.5px;
  font-family: inherit;
}
.ghost:hover { color: var(--text); border-color: var(--accent-dim); }

/* ── 論壇帳號登入（公開模式：每個訪客登入自己的帳號）───── */

.forum-login {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.forum-login[hidden] { display: none; }

.forum-login-box {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  width: min(90%, 380px);
}
.forum-login-box h1 { font-size: 18px; margin: 0 0 6px; }
.forum-login-box p { color: var(--muted); font-size: 13px; margin: 0 0 18px; line-height: 1.6; }
.forum-login-box input {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  padding: 10px 12px;
  font: inherit;
  margin-bottom: 12px;
}
.forum-login-box input:focus { outline: none; border-color: var(--accent); }
.forum-login-box button {
  width: 100%;
  background: var(--accent);
  color: #0d1117;
  border: none;
  border-radius: 8px;
  padding: 10px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.forum-login-box button:disabled { background: var(--line); color: var(--muted); cursor: not-allowed; }
.forum-login-box .err { color: var(--bad); font-size: 13px; margin-top: 10px; min-height: 16px; }

/* ── 對話區 ─────────────────────────────────────────── */

.log {
  flex: 1;
  overflow-y: auto;
  padding: 22px 16px 8px;
  scroll-behavior: smooth;
}

.log > * {
  max-width: 780px;
  margin: 0 auto 16px;
}

.welcome { text-align: center; padding: 36px 0 12px; }
.welcome h1 { font-size: 24px; margin: 0 0 8px; font-weight: 600; }
.welcome p { color: var(--muted); margin: 0 0 18px; }
.welcome .hint { font-size: 13px; margin-top: 20px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }

.chip {
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 7px 13px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 13.5px;
  font-family: inherit;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }

.bubble-user {
  background: var(--accent-dim);
  border: 1px solid #35507a;
  border-radius: var(--radius) var(--radius) 3px var(--radius);
  padding: 9px 14px;
  width: fit-content;
  max-width: min(78%, 620px);
  margin-left: auto;
  margin-right: max(0px, calc(50% - 390px));
  white-space: pre-wrap;
  word-break: break-word;
}

.turn {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 3px var(--radius) var(--radius) var(--radius);
  padding: 14px 16px;
}

/* ── 進度／狀態 ─────────────────────────────────────── */

.status {
  color: var(--muted);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0;
}

.spinner {
  width: 11px; height: 11px;
  border: 2px solid var(--line);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  flex: none;
}
@keyframes spin { to { transform: rotate(360deg); } }

.status.done .spinner {
  border: none;
  width: 11px; height: 11px;
  animation: none;
  background: none;
}
.status.done::before { content: "✓"; color: var(--good); font-size: 12px; }
.status.done .spinner { display: none; }

/* ── 搜尋條件 ───────────────────────────────────────── */

.plan {
  background: var(--panel-2);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 10px 13px;
  margin: 10px 0 14px;
  font-size: 13.5px;
}
.plan .explain { margin-bottom: 8px; }
.plan .tags { display: flex; flex-wrap: wrap; gap: 6px; }

.tag {
  background: #131920;
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 11.5px;
}
.tag.engine-claude { color: var(--accent); border-color: var(--accent-dim); }
.tag.engine-rule   { color: var(--good); border-color: #24463c; }
.tag.note          { color: var(--warn); border-color: #4a3c1c; }

/* ── 摘要 ───────────────────────────────────────────── */

.summary {
  background: linear-gradient(180deg, #17202c, #151b23);
  border: 1px solid #263449;
  border-radius: 10px;
  padding: 13px 15px;
  margin: 4px 0 14px;
  white-space: pre-wrap;
  word-break: break-word;
}
.summary .label {
  display: block;
  font-size: 11.5px;
  color: var(--accent);
  letter-spacing: .06em;
  margin-bottom: 6px;
}

.summary p { margin: 0 0 10px; }
.summary p:last-child { margin-bottom: 0; }
.summary strong { color: var(--accent); font-weight: 700; }
.summary ul, .summary ol { margin: 4px 0 12px; padding-left: 22px; }
.summary li { margin: 3px 0; }
.summary li:last-child { margin-bottom: 0; }
.summary hr { border: none; border-top: 1px solid var(--line); margin: 12px 0; }

.summary .sources {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}
.summary .sources .label { margin-bottom: 8px; }
.summary .sources .results { gap: 6px; }

/* ── 結果清單 ───────────────────────────────────────── */

.count { font-size: 13px; color: var(--muted); margin-bottom: 10px; }

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

.card {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 11px 13px;
  transition: border-color .15s;
}
.card:hover { border-color: var(--accent-dim); }

.card .row1 { display: flex; align-items: baseline; gap: 8px; }

.card .idx {
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  flex: none;
  min-width: 20px;
}

.card a.title {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  word-break: break-word;
}
.card a.title:hover { color: var(--accent); text-decoration: underline; }

.card .row2 {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  margin: 6px 0 0 28px;
  font-size: 12.5px;
  color: var(--muted);
}
.card .row2 b { color: #b6c0cf; font-weight: 500; }

.badge {
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 5px;
  flex: none;
}
.badge.sticky   { background: #3a2f14; color: var(--warn); }
.badge.old      { background: #2f2020; color: #d59191; }
.badge.fresh    { background: #14302a; color: var(--good); }
.badge.external { background: #1c2f3a; color: #7ec8e3; }

.card .snippet {
  margin: 6px 0 0 28px;
  font-size: 12.5px;
  color: var(--muted);
}

.empty {
  color: var(--muted);
  background: var(--panel-2);
  border: 1px dashed var(--line);
  border-radius: 10px;
  padding: 16px;
  text-align: center;
}

.error {
  background: #2a1a1a;
  border: 1px solid #4d2b2b;
  color: #f0b4b4;
  border-radius: 10px;
  padding: 11px 14px;
}

.ask {
  background: #241f14;
  border: 1px solid #4a3f22;
  color: #e8d5a8;
  border-radius: 10px;
  padding: 11px 14px;
}

/* ── 輸入區 ─────────────────────────────────────────── */

.composer {
  flex: none;
  display: flex;
  gap: 10px;
  align-items: flex-end;
  padding: 12px 16px 16px;
  background: var(--panel);
  border-top: 1px solid var(--line);
}
.composer[hidden] { display: none; }

.composer textarea {
  flex: 1;
  max-width: 690px;
  margin-left: auto;
  resize: none;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  padding: 11px 13px;
  font: inherit;
  line-height: 1.5;
  max-height: 160px;
  overflow-y: auto;
}
.composer textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.composer button {
  margin-right: auto;
  background: var(--accent);
  color: #0d1117;
  border: none;
  border-radius: 10px;
  padding: 11px 20px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  flex: none;
}
.composer button:disabled { background: var(--line); color: var(--muted); cursor: not-allowed; }

@media (max-width: 640px) {
  .bubble-user { margin-right: 0; max-width: 88%; }
  .card .row2 { margin-left: 0; }
  .composer textarea, .composer button { margin: 0; }
}