:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1f232d;
  --border: #2a2f3a;
  --text: #e8eaf0;
  --muted: #8b93a5;
  --accent: #4f8cff;
  --accent-2: #6ee7b7;
  --danger: #f87171;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
  display: flex;
  flex-direction: column;
  height: 100dvh;
}

header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: calc(10px + env(safe-area-inset-top)) 14px 10px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
  flex-shrink: 0;
}

header .title {
  font-size: 17px;
  font-weight: 600;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

header a.btn, header button.btn {
  font-size: 14px;
  color: var(--accent);
  text-decoration: none;
  background: none;
  border: none;
  padding: 6px 4px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}

#app-link-bar {
  display: none;
  padding: 8px 14px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
  flex-shrink: 0;
}

#app-link-bar a { color: var(--accent-2); text-decoration: none; }

#messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 14px calc(16px + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.msg {
  max-width: 88%;
  padding: 10px 14px;
  border-radius: 16px;
  line-height: 1.6;
  font-size: 15px;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg.user {
  align-self: flex-end;
  background: var(--accent);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.msg.assistant {
  align-self: flex-start;
  background: var(--panel);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.msg .reasoning {
  color: var(--muted);
  font-size: 13px;
  border-left: 2px solid var(--border);
  padding-left: 10px;
  margin-bottom: 8px;
  max-height: 160px;
  overflow-y: auto;
}

.msg .content:empty { display: none; }

.tool-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.tool-chips:empty { display: none; }

.chip {
  font-size: 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 10px;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.chip.running { color: var(--accent); border-color: var(--accent); }
.chip.done { color: var(--accent-2); }

.app-card {
  align-self: flex-start;
  background: linear-gradient(135deg, #1c2433, #17211c);
  border: 1px solid var(--accent-2);
  border-radius: 16px;
  padding: 14px 18px;
  max-width: 88%;
}

.app-card .name { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.app-card .hint { font-size: 13px; color: var(--muted); margin-bottom: 10px; line-height: 1.5; }

.app-card a.open-btn {
  display: block;
  text-align: center;
  background: var(--accent-2);
  color: #0f1115;
  font-weight: 600;
  text-decoration: none;
  border-radius: 10px;
  padding: 12px;
  min-height: 44px;
}

.msg.error {
  align-self: center;
  background: rgba(248, 113, 113, 0.12);
  border: 1px solid var(--danger);
  color: var(--danger);
  font-size: 14px;
}

#typing {
  display: none;
  align-self: flex-start;
  color: var(--muted);
  font-size: 13px;
  padding: 4px 8px;
}

#input-bar {
  display: flex;
  gap: 8px;
  padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
  background: var(--panel);
  flex-shrink: 0;
}

#input {
  flex: 1;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 11px 16px;
  color: var(--text);
  font-size: 16px;
  min-height: 44px;
  outline: none;
  resize: none;
  font-family: inherit;
}

#input:focus { border-color: var(--accent); }

#send-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 22px;
  padding: 0 20px;
  font-size: 15px;
  font-weight: 600;
  min-height: 44px;
  min-width: 64px;
  cursor: pointer;
}

#send-btn:disabled { opacity: 0.4; }

#send-btn.stop { background: var(--danger); }

/* 常驻悬浮「打开应用」按钮 */
#float-open {
  position: fixed;
  right: 16px;
  bottom: calc(96px + env(safe-area-inset-bottom));
  z-index: 50;
  padding: 12px 20px;
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #06251a;
  font-size: 15px;
  font-weight: 700;
  box-shadow: 0 6px 20px rgba(108, 240, 194, 0.35);
  cursor: pointer;
  max-width: 60vw;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#float-open:active { transform: scale(0.95); }

/* ---- 列表页 ---- */
#apps-list {
  flex: 1;
  overflow-y: auto;
  padding: 16px 14px calc(16px + env(safe-area-inset-bottom));
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  align-content: start;
}

.app-item {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.app-item .icon { font-size: 32px; }
.app-item .name { font-weight: 600; font-size: 15px; word-break: break-all; }
.app-item .time { font-size: 12px; color: var(--muted); }

.app-item .actions {
  display: flex;
  gap: 6px;
  margin-top: 4px;
  flex-wrap: wrap;
}

.app-item .actions a, .app-item .actions button {
  font-size: 13px;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  min-height: 36px;
  display: inline-flex;
  align-items: center;
}

.app-item .actions a.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.app-item .actions button.danger { color: var(--danger); }

.empty-tip {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--muted);
  margin-top: 60px;
  line-height: 2;
}

.badge-busy {
  font-size: 11px;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 1px 8px;
  align-self: flex-start;
}

/* ---- 侧边栏 ---- */
#sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 280px;
  max-width: 82vw;
  background: var(--panel);
  border-right: 1px solid var(--border);
  transform: translateX(-100%);
  transition: transform 0.2s ease;
  z-index: 30;
  display: flex;
  flex-direction: column;
  padding-top: env(safe-area-inset-top);
}

#sidebar.open { transform: translateX(0); }

#sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 25;
}

#sidebar-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 14px 10px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}

#new-session-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 13px;
  padding: 8px 12px;
  min-height: 36px;
  cursor: pointer;
}

#session-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.session-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 10px;
  border-radius: 10px;
  cursor: pointer;
  color: var(--text);
}

.session-item.active { background: var(--panel-2); }
.session-item:active { background: var(--panel-2); }

.session-item .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: transparent;
  flex-shrink: 0;
}

.session-item .dot.running {
  background: var(--accent-2);
  animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
  50% { opacity: 0.3; }
}

.session-item .s-title {
  flex: 1;
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.session-item .s-btn {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 14px;
  padding: 6px;
  min-width: 32px;
  min-height: 32px;
  cursor: pointer;
  visibility: hidden;
}

.session-item.active .s-btn, .session-item:active .s-btn { visibility: visible; }

@media (hover: hover) {
  .session-item:hover .s-btn { visibility: visible; }
}

.session-empty {
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  margin-top: 30px;
}

.icon-btn {
  font-size: 18px;
  color: var(--text) !important;
  padding: 6px 8px !important;
}

/* 应用卡片（会话内） */
.app-card .app-icon { font-size: 22px; margin-right: 6px; }