#tool-body {
  --c-primary: #0d9488;
  --c-primary-dark: #0f766e;
  --c-primary-soft: #ccfbf1;
  --c-bg: #f8fafc;
  --c-card: #ffffff;
  --c-border: #e2e8f0;
  --c-text: #0f172a;
  --c-text-2: #64748b;
  --c-ok: #059669;
  --c-ok-bg: #ecfdf5;
  --c-warn: #b45309;
  --c-warn-bg: #fffbeb;
  --c-bad: #dc2626;
  --c-bad-bg: #fef2f2;
  --c-shadow: 0 1px 3px rgba(15, 23, 42, .06), 0 4px 14px rgba(15, 23, 42, .04);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--c-text);
  -webkit-font-smoothing: antialiased;
}
.theme-dark-mode #tool-body {
  --c-primary: #2dd4bf;
  --c-primary-dark: #5eead4;
  --c-primary-soft: #134e4a;
  --c-bg: #0f172a;
  --c-card: #1e293b;
  --c-border: #334155;
  --c-text: #f1f5f9;
  --c-text-2: #94a3b8;
  --c-ok: #34d399;
  --c-ok-bg: #064e3b;
  --c-warn: #fbbf24;
  --c-warn-bg: #451a03;
  --c-bad: #f87171;
  --c-bad-bg: #450a0a;
  --c-shadow: none;
}

#tool-body .ls-wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 4px 0 32px;
}
#tool-body .ls-lan-hint {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  padding: 8px 14px;
  border-radius: 10px;
  background: var(--c-primary-soft);
  color: var(--c-primary-dark);
  font-size: 13px;
  font-weight: 600;
}
#tool-body .ls-lan-hint .fa { font-size: 15px; }
.theme-dark-mode #tool-body .ls-lan-hint { color: var(--c-primary); }
#tool-body .ls-hidden { display: none !important; }

/* ===== 提示條 ===== */
#tool-body .ls-notice {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13px;
  line-height: 1.55;
  margin-bottom: 12px;
  animation: lsIn .18s ease;
}
#tool-body .ls-notice.warn { background: var(--c-warn-bg); color: var(--c-warn); }
#tool-body .ls-notice.error { background: var(--c-bad-bg); color: var(--c-bad); }
#tool-body .ls-notice .fa { margin-top: 2px; }

/* ===== 卡片 ===== */
#tool-body .ls-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: 16px;
  box-shadow: var(--c-shadow);
  padding: 22px;
  margin-bottom: 14px;
}

/* ===== 按鈕 ===== */
#tool-body .ls-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 40px;
  padding: 0 18px;
  border-radius: 10px;
  border: 1px solid var(--c-border);
  background: var(--c-card);
  color: var(--c-text);
  font-size: 14px;
  cursor: pointer;
  transition: all .15s ease;
  user-select: none;
}
#tool-body .ls-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }
#tool-body .ls-btn.primary {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
}
.theme-dark-mode #tool-body .ls-btn.primary { color: #06281f; }
#tool-body .ls-btn.primary:hover { background: var(--c-primary-dark); border-color: var(--c-primary-dark); }
#tool-body .ls-btn.big {
  width: 100%;
  height: 48px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 12px;
}
#tool-body .ls-btn.sm {
  height: 30px;
  padding: 0 12px;
  font-size: 12.5px;
  border-radius: 8px;
}
#tool-body .ls-btn[disabled] { opacity: .5; cursor: not-allowed; }

/* ===== 連接卡片：選項卡 ===== */
#tool-body .ls-tabs {
  display: flex;
  padding: 4px;
  background: var(--c-bg);
  border-radius: 12px;
  margin-bottom: 18px;
}
.theme-dark-mode #tool-body .ls-tabs { background: rgba(15, 23, 42, .5); }
#tool-body .ls-tab {
  flex: 1;
  height: 38px;
  border: none;
  border-radius: 9px;
  background: transparent;
  color: var(--c-text-2);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s ease;
}
#tool-body .ls-tab.active {
  background: var(--c-card);
  color: var(--c-text);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(15, 23, 42, .1);
}
#tool-body .ls-tip {
  margin: 0 0 14px;
  font-size: 13px;
  color: var(--c-text-2);
  line-height: 1.6;
  text-align: center;
}
#tool-body .ls-code-input {
  width: 100%;
  height: 56px;
  margin-bottom: 12px;
  border: 1.5px solid var(--c-border);
  border-radius: 12px;
  background: var(--c-bg);
  color: var(--c-text);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 10px;
  text-indent: 10px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  outline: none;
  transition: border-color .15s ease;
}
.theme-dark-mode #tool-body .ls-code-input { background: rgba(15, 23, 42, .5); }
#tool-body .ls-code-input:focus { border-color: var(--c-primary); }
#tool-body .ls-code-input::placeholder {
  color: var(--c-text-2);
  opacity: .4;
  letter-spacing: 10px;
}

/* ===== 等待面板 ===== */
#tool-body .ls-wait-label {
  text-align: center;
  font-size: 13px;
  color: var(--c-text-2);
  margin-bottom: 4px;
}
#tool-body .ls-room-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
#tool-body .ls-room-code {
  text-align: center;
  font-size: 54px;
  font-weight: 800;
  letter-spacing: 14px;
  text-indent: 14px;
  color: var(--c-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  user-select: all;
  animation: lsPulse 2.2s ease-in-out infinite;
}
#tool-body .ls-wait-status {
  text-align: center;
  font-size: 13px;
  color: var(--c-text-2);
  margin: 8px 0 16px;
}
#tool-body .ls-qr {
  display: flex;
  justify-content: center;
  margin-bottom: 10px;
}
#tool-body .ls-qr-tip {
  text-align: center;
  font-size: 12px;
  color: var(--c-text-2);
  margin-bottom: 16px;
}
#tool-body .ls-copy-code {
  width: 36px;
  height: 36px;
  padding: 0;
  justify-content: center;
  flex: none;
}
#tool-body .ls-qr canvas {
  display: block;
  width: 116px !important;
  height: 116px !important;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: 12px;
  box-sizing: content-box;
}
#tool-body .ls-btn-row {
  display: flex;
  justify-content: center;
  gap: 10px;
}

/* ===== 連接中 / 失敗面板 ===== */
#tool-body .ls-pairing { text-align: center; padding: 8px 0 4px; }
#tool-body .ls-pairing-room {
  font-size: 13px;
  color: var(--c-text-2);
  margin-bottom: 14px;
  font-variant-numeric: tabular-nums;
}
#tool-body .ls-pairing-room b {
  color: var(--c-primary);
  letter-spacing: 3px;
  font-size: 15px;
}
#tool-body .ls-spinner {
  width: 34px;
  height: 34px;
  margin: 0 auto 12px;
  border-radius: 50%;
  border: 3px solid var(--c-primary-soft);
  border-top-color: var(--c-primary);
  animation: lsSpin .8s linear infinite;
}
#tool-body .ls-fail-ico {
  width: 40px;
  height: 40px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background: var(--c-bad-bg);
  color: var(--c-bad);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}
#tool-body .ls-pairing-who {
  font-size: 13px;
  color: var(--c-text-2);
  min-height: 1.2em;
  margin: 6px 0 12px;
}
#tool-body .ls-pairing-text {
  font-size: 14px;
  color: var(--c-text);
  margin-bottom: 4px;
}
#tool-body .ls-pairing-sub {
  font-size: 12.5px;
  color: var(--c-text-2);
  margin-bottom: 16px;
  line-height: 1.6;
}

/* ===== 已連接橫幅 ===== */
#tool-body .ls-connbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 12px;
  background: var(--c-ok-bg);
  color: var(--c-ok);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 14px;
  animation: lsIn .18s ease;
}
#tool-body .ls-connbar .ls-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-ok);
  box-shadow: 0 0 0 0 rgba(5, 150, 105, .4);
  animation: lsDot 2s ease-out infinite;
  flex: none;
}
#tool-body .ls-conn-main { flex: 1; min-width: 0; line-height: 1.35; }
#tool-body .ls-conn-line { display: flex; align-items: center; gap: 8px; }
#tool-body .ls-role {
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
  padding: 3px 7px;
  border-radius: 999px;
  background: #059669;
  color: #fff;
  letter-spacing: .5px;
}
#tool-body .ls-role.is-guest { background: #2563eb; color: #fff; }
.theme-dark-mode #tool-body .ls-role { background: #047857; color: #fff; }
.theme-dark-mode #tool-body .ls-role.is-guest { background: #1d4ed8; color: #fff; }
#tool-body .ls-conn-sub {
  margin-top: 3px;
  font-size: 12px;
  font-weight: 500;
  opacity: .8;
}
#tool-body .ls-conn-sub b {
  letter-spacing: 1px;
  font-variant-numeric: tabular-nums;
}
#tool-body .ls-connbar .ls-btn { margin-left: auto; flex: none; }

/* ===== 傳輸區 ===== */
#tool-body .ls-drop {
  border: 2px dashed var(--c-border);
  border-radius: 14px;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 20px;
  color: var(--c-text-2);
  background: var(--c-bg);
  cursor: pointer;
  transition: all .15s ease;
  margin-bottom: 12px;
  text-align: center;
  font-size: 14px;
}
.theme-dark-mode #tool-body .ls-drop { background: rgba(15, 23, 42, .5); }
#tool-body .ls-drop .fa { font-size: 26px; opacity: .6; }
#tool-body .ls-drop:hover, #tool-body .ls-drop.is-over {
  border-color: var(--c-primary);
  color: var(--c-primary);
  background: var(--c-primary-soft);
}
.theme-dark-mode #tool-body .ls-drop:hover, .theme-dark-mode #tool-body .ls-drop.is-over { background: rgba(19, 78, 74, .4); }
#tool-body .ls-text-row {
  position: relative;
}
#tool-body .ls-text-input {
  display: block;
  width: 100%;
  min-width: 0;
  height: 64px;
  min-height: 64px;
  max-height: 140px;
  padding: 10px 88px 10px 14px;
  box-sizing: border-box;
  border: 1.5px solid var(--c-border);
  border-radius: 10px;
  background: var(--c-card);
  color: var(--c-text);
  font-size: 14px;
  font-family: inherit;
  line-height: 1.5;
  resize: none;
  overflow: hidden;
  outline: none;
  transition: border-color .15s ease;
}
#tool-body .ls-text-input:focus { border-color: var(--c-primary); }
#tool-body .ls-text-row .ls-btn {
  position: absolute;
  right: 8px;
  bottom: 8px;
  height: 32px;
  padding: 0 12px;
}
#tool-body .ls-offscreen {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

/* ===== 記錄區 ===== */
#tool-body .ls-rec-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}
#tool-body .ls-dl-hint {
  margin: 0 0 8px;
  font-size: 12px;
  line-height: 1.45;
  color: var(--c-text-2);
}
#tool-body .ls-rec-title {
  font-size: 15px;
  font-weight: 700;
}
#tool-body .ls-rec-tools {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}
#tool-body .ls-switch {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  color: var(--c-text-2);
  cursor: pointer;
  user-select: none;
}
#tool-body .ls-switch input { display: none; }
#tool-body .ls-switch .ls-track {
  width: 34px;
  height: 20px;
  border-radius: 999px;
  background: var(--c-border);
  position: relative;
  transition: background .15s ease;
  flex: 0 0 auto;
}
#tool-body .ls-switch .ls-track::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  transition: transform .15s ease;
  box-shadow: 0 1px 2px rgba(0, 0, 0, .2);
}
#tool-body .ls-switch input:checked + .ls-track { background: var(--c-primary); }
#tool-body .ls-switch input:checked + .ls-track::after { transform: translateX(14px); }

#tool-body .ls-rec {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--c-border);
  animation: lsIn .18s ease;
}
#tool-body .ls-rec:last-child { border-bottom: none; }
#tool-body .ls-rec-ico {
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
}
#tool-body .ls-rec-ico.up { background: #dbeafe; color: #1d4ed8; }
.theme-dark-mode #tool-body .ls-rec-ico.up { background: #1e3a5f; color: #93c5fd; }
#tool-body .ls-rec-ico.down { background: var(--c-ok-bg); color: var(--c-ok); }
#tool-body .ls-rec-ico.bad { background: var(--c-bad-bg); color: var(--c-bad); }
#tool-body .ls-rec-thumb {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--c-border);
  cursor: zoom-in;
}
#tool-body .ls-rec-body { flex: 1; min-width: 0; }
#tool-body .ls-rec-name {
  font-size: 14px;
  font-weight: 600;
  word-break: break-all;
  line-height: 1.45;
}
#tool-body .ls-rec-text {
  font-size: 13.5px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 120px;
  overflow: auto;
}
#tool-body .ls-rec-meta,
#tool-body .ls-rec-sub {
  font-size: 12px;
  font-weight: 400;
  line-height: 1.45;
  color: var(--c-text-2);
}
#tool-body .ls-rec-meta {
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}
#tool-body .ls-rec-sub { margin-top: 2px; }
#tool-body .ls-rec-bar {
  height: 4px;
  margin-top: 8px;
  border-radius: 99px;
  background: var(--c-border);
  overflow: hidden;
}
#tool-body .ls-rec-bar i {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 99px;
  background: var(--c-primary);
  transition: width .12s linear;
}
#tool-body .ls-rec-act {
  flex: 0 0 auto;
  display: flex;
  gap: 6px;
}

#tool-body .ls-foot {
  text-align: center;
  margin-top: 6px;
}
#tool-body .ls-foot .ls-btn { border: none; color: var(--c-text-2); }

@keyframes lsSpin { to { transform: rotate(360deg); } }
@keyframes lsIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
@keyframes lsPulse { 0%, 100% { opacity: 1; } 50% { opacity: .55; } }
@keyframes lsDot {
  0% { box-shadow: 0 0 0 0 rgba(5, 150, 105, .45); }
  70% { box-shadow: 0 0 0 8px rgba(5, 150, 105, 0); }
  100% { box-shadow: 0 0 0 0 rgba(5, 150, 105, 0); }
}

@media (max-width: 640px) {
  #tool-body .ls-card { padding: 16px; border-radius: 14px; }
  #tool-body .ls-room-code { font-size: 40px; letter-spacing: 9px; text-indent: 9px; }
  #tool-body .ls-text-row .ls-btn { width: auto; }
  #tool-body .ls-rec-act .ls-btn .fa { margin: 0; }
  #tool-body .ls-rec-act .ls-btn span { display: none; }
  #tool-body .ls-rec-act .ls-btn.sm { padding: 0 10px; }
}