/* CC Voice v3 — 样式 (用户系统 + 好友 + IM) */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg-primary: #0f1117;
  --bg-secondary: #151820;
  --bg-card: rgba(30, 32, 38, 0.8);
  --bg-sidebar: #12141a;
  --text-primary: #e2e4e9;
  --text-secondary: #8a8f98;
  --text-muted: #6b7280;
  --accent-start: #6366f1;
  --accent-end: #8b5cf6;
  --accent-light: #a5b4fc;
  --border: rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.08);
  --border-input: rgba(255, 255, 255, 0.1);
  --success: #10b981;
  --warning: #f59e0b;
  --info: #3b82f6;
  --error: #ef4444;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
}

/* ─── Login Screen ────────────────────────────────── */
.login-screen {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
  z-index: 200;
}
.login-screen::before {
  content: ''; position: absolute; top: 20%; left: 50%; transform: translateX(-50%);
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, transparent 70%);
  pointer-events: none;
}
.login-card {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; align-items: center;
  padding: 40px 32px; width: 320px;
  background: var(--bg-card); border-radius: 20px;
  border: 1px solid var(--border-light);
  backdrop-filter: blur(20px);
  animation: fadeSlideIn 0.4s ease-out;
}
.login-logo { font-size: 48px; margin-bottom: 12px; }
.login-title {
  font-size: 24px; font-weight: 700; margin-bottom: 4px;
  background: linear-gradient(135deg, var(--accent-light), #818cf8);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.login-subtitle { font-size: 13px; color: var(--text-muted); margin-bottom: 24px; }
.login-input {
  width: 100%; padding: 12px 16px; border-radius: 12px;
  border: 1px solid var(--border-input); background: rgba(0,0,0,0.3);
  color: var(--text-primary); font-size: 15px; outline: none;
  font-family: 'Inter', -apple-system, sans-serif;
  text-align: center; transition: border-color 0.2s;
}
.login-input:focus { border-color: var(--accent-start); }
.login-input::placeholder { color: var(--text-muted); }
.login-btn {
  width: 100%; margin-top: 12px; padding: 12px 0; border-radius: 12px; border: none;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: #fff; font-size: 15px; font-weight: 600; cursor: pointer;
  font-family: 'Inter', -apple-system, sans-serif;
  transition: opacity 0.2s;
}
.login-btn:active { opacity: 0.85; }
.login-referral { margin-top: 8px; font-family: 'JetBrains Mono', monospace; letter-spacing: 0.1em; text-transform: uppercase; }
.login-error { font-size: 12px; color: var(--error); margin-top: 8px; display: none; text-align: center; }
.login-hint { font-size: 11px; color: var(--text-muted); margin-top: 16px; text-align: center; line-height: 1.5; }
.logout-btn { color: var(--error) !important; font-size: 12px !important; }

/* ─── Sidebar Overlay ─────────────────────────────── */
.sidebar-overlay {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 98;
  opacity: 0; pointer-events: none;
  transition: opacity 0.3s;
}
.sidebar-overlay.visible { opacity: 1; pointer-events: auto; }

/* ─── Sidebar ─────────────────────────────────────── */
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: 300px; max-width: 80vw;
  background: var(--bg-sidebar);
  z-index: 99;
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  display: flex; flex-direction: column;
  border-right: 1px solid var(--border);
}
.sidebar.open { transform: translateX(0); }

.sidebar-header {
  padding: 16px 16px 12px;
  display: flex; justify-content: space-between; align-items: center;
  border-bottom: 1px solid var(--border);
}
.sidebar-title {
  font-size: 16px; font-weight: 700;
  background: linear-gradient(135deg, var(--accent-light), #818cf8);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.sidebar-close {
  background: none; border: none; color: var(--text-muted); font-size: 18px; cursor: pointer;
  width: 32px; height: 32px; display: flex; align-items: center; justify-content: center;
  border-radius: 8px;
}
.sidebar-close:active { background: rgba(255,255,255,0.06); }

/* Sidebar tabs */
.sidebar-tabs {
  display: flex; gap: 0; border-bottom: 1px solid var(--border);
}
.sidebar-tab {
  flex: 1; padding: 10px 0; border: none; background: none;
  color: var(--text-muted); font-size: 13px; font-weight: 500;
  cursor: pointer; transition: all 0.2s;
  border-bottom: 2px solid transparent;
}
.sidebar-tab.tab-active {
  color: var(--accent-light);
  border-bottom-color: var(--accent-start);
  background: rgba(99, 102, 241, 0.06);
}
.sidebar-tab:active { background: rgba(255,255,255,0.04); }

.sidebar-actions {
  display: flex; gap: 6px; padding: 12px 16px;
}
.sidebar-btn {
  padding: 6px 12px; border-radius: 8px; border: 1px solid var(--border-light);
  background: rgba(255,255,255,0.04); color: var(--text-secondary);
  font-size: 13px; cursor: pointer; transition: all 0.2s;
}
.sidebar-btn:active { background: rgba(255,255,255,0.1); }
.new-conv-btn, .add-friend-btn {
  flex: 1; background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: #fff; font-weight: 600; border: none;
}

/* My invite code */
.my-invite-code {
  padding: 8px 16px; font-size: 12px; color: var(--accent-light);
  font-family: 'JetBrains Mono', monospace; letter-spacing: 0.03em;
  background: rgba(99, 102, 241, 0.06); border-bottom: 1px solid var(--border);
  text-align: center; cursor: pointer; user-select: all;
}

/* Add friend panel */
.add-friend-panel {
  display: flex; gap: 8px; padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  animation: fadeSlideIn 0.2s ease-out;
}
.add-friend-input {
  flex: 1; padding: 8px 12px; border-radius: 8px;
  border: 1px solid var(--border-input); background: rgba(0,0,0,0.3);
  color: var(--text-primary); font-size: 13px; outline: none;
  font-family: 'JetBrains Mono', monospace;
}
.add-friend-input:focus { border-color: var(--accent-start); }
.add-friend-submit {
  padding: 8px 16px; border-radius: 8px; border: none;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: #fff; font-size: 13px; font-weight: 600; cursor: pointer;
}
.add-friend-submit:active { opacity: 0.85; }

/* Search box */
.search-box { padding: 0 16px 12px; }
.search-input {
  width: 100%; padding: 8px 12px; border-radius: 8px;
  border: 1px solid var(--border-input); background: rgba(0,0,0,0.3);
  color: var(--text-primary); font-size: 13px; outline: none;
}
.search-input:focus { border-color: var(--accent-start); }
.search-results, .starred-panel { max-height: 200px; overflow-y: auto; padding: 0 16px; }
.search-result-item {
  padding: 10px 12px; border-radius: 8px; margin-bottom: 4px;
  background: rgba(255,255,255,0.03); cursor: pointer; transition: background 0.15s;
}
.search-result-item:active { background: rgba(255,255,255,0.08); }
.search-result-title { font-size: 12px; font-weight: 600; color: var(--accent-light); margin-bottom: 2px; }
.search-result-snippet { font-size: 12px; color: var(--text-secondary); line-height: 1.4; }
.search-result-time { font-size: 10px; color: var(--text-muted); margin-top: 4px; font-family: 'JetBrains Mono', monospace; }
.search-empty { padding: 20px; text-align: center; color: var(--text-muted); font-size: 13px; }

/* Conversation list */
.conv-list { flex: 1; overflow-y: auto; padding: 4px 8px; }
.conv-list::-webkit-scrollbar { width: 3px; }
.conv-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 3px; }

.conv-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px; border-radius: 10px; margin-bottom: 2px;
  cursor: pointer; transition: background 0.15s;
}
.conv-item:active, .conv-item.active { background: rgba(99, 102, 241, 0.12); }
.conv-item.pinned { border-left: 2px solid var(--accent-start); }

.conv-item-main { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.conv-icon { font-size: 12px; margin-bottom: 1px; }
.conv-pin { font-size: 10px; }
.conv-title-text { font-size: 13px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.conv-meta { font-size: 10px; color: var(--text-muted); font-family: 'JetBrains Mono', monospace; }

.conv-item-actions { display: flex; gap: 2px; opacity: 0; transition: opacity 0.15s; flex-shrink: 0; }
.conv-item:active .conv-item-actions, .conv-item:hover .conv-item-actions { opacity: 1; }
@media (hover: none) { .conv-item-actions { opacity: 0.6; } }

.conv-action-btn {
  background: none; border: none; font-size: 12px; padding: 4px; cursor: pointer;
  border-radius: 4px; opacity: 0.6; transition: opacity 0.15s;
}
.conv-action-btn:active { opacity: 1; background: rgba(255,255,255,0.06); }
.conv-action-btn.danger:active { background: rgba(239,68,68,0.15); }

.conv-empty { padding: 40px 20px; text-align: center; color: var(--text-muted); font-size: 13px; white-space: pre-line; line-height: 1.6; }

/* Unread badge */
.unread-badge {
  min-width: 18px; height: 18px; padding: 0 5px; border-radius: 9px;
  background: var(--error); color: #fff; font-size: 10px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}

/* ─── Friends List ────────────────────────────────── */
.friends-list { flex: 1; overflow-y: auto; padding: 4px 8px; }
.friends-list::-webkit-scrollbar { width: 3px; }
.friends-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 3px; }

.friend-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px; border-radius: 10px; margin-bottom: 2px;
  transition: background 0.15s;
}
.friend-item:active { background: rgba(255,255,255,0.04); }
.friend-info { display: flex; align-items: center; gap: 10px; flex: 1; min-width: 0; }
.friend-avatar {
  width: 36px; height: 36px; border-radius: 50%; flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: #fff; font-size: 15px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.friend-name { font-size: 14px; font-weight: 500; display: flex; align-items: center; gap: 6px; }
.friend-code { font-size: 11px; color: var(--text-muted); font-family: 'JetBrains Mono', monospace; }
.friend-avatar.online { box-shadow: 0 0 0 2px var(--success); }
.online-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--success); display: inline-block; flex-shrink: 0; }
.friend-actions { display: flex; gap: 6px; flex-shrink: 0; }
.friend-chat-btn {
  padding: 5px 12px; border-radius: 8px; border: none;
  background: rgba(99, 102, 241, 0.15); color: var(--accent-light);
  font-size: 12px; font-weight: 500; cursor: pointer; transition: background 0.2s;
}
.friend-chat-btn:active { background: rgba(99, 102, 241, 0.3); }
.friend-remove-btn {
  padding: 5px 8px; border-radius: 8px; border: none;
  background: rgba(239, 68, 68, 0.1); color: var(--error);
  font-size: 12px; cursor: pointer; transition: background 0.2s;
}
.friend-remove-btn:active { background: rgba(239, 68, 68, 0.25); }

/* ─── App Shell ────────────────────────────────────── */
#mainApp {
  width: 100%; height: 100vh; height: 100dvh;
}

#app {
  width: 100%; max-width: 480px;
  height: 100vh; height: 100dvh;
  margin: 0 auto; display: flex; flex-direction: column;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
  position: relative; overflow: hidden;
}

#app::before {
  content: ''; position: absolute; top: -120px; left: 50%; transform: translateX(-50%);
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
  pointer-events: none; z-index: 0;
}

/* ─── Header ───────────────────────────────────────── */
.header {
  padding: 16px 12px 16px 16px; display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--border); backdrop-filter: blur(20px); position: relative; z-index: 10;
}
.header-title {
  font-size: 18px; font-weight: 700; letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--accent-light), #818cf8);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.header-subtitle {
  font-size: 11px; color: var(--text-muted); margin-top: 1px; letter-spacing: 0.03em;
  max-width: 160px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.header-actions { display: flex; gap: 6px; align-items: center; }

/* Connection badge */
.conn-badge { display: flex; align-items: center; gap: 4px; padding: 4px 10px; border-radius: 20px; font-size: 11px; transition: all 0.3s; }
.conn-badge.connected { background: rgba(16,185,129,0.12); color: var(--success); }
.conn-badge.disconnected { background: rgba(239,68,68,0.12); color: var(--error); }
.conn-badge.connecting { background: rgba(245,158,11,0.12); color: var(--warning); }
.conn-dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* Icon buttons */
.icon-btn {
  background: rgba(255,255,255,0.06); border: 1px solid var(--border-light); color: #9ca3af;
  width: 32px; height: 32px; border-radius: 8px; font-size: 14px; font-weight: 600;
  cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background 0.2s;
}
.icon-btn:active { background: rgba(255,255,255,0.12); }
.icon-btn.lang { color: var(--accent-light); font-size: 12px; }

/* ─── Settings ─────────────────────────────────────── */
.settings-panel { padding: 16px 20px; background: rgba(20,22,28,0.95); border-bottom: 1px solid var(--border); backdrop-filter: blur(20px); animation: fadeSlideIn 0.2s ease-out; }
.settings-label { font-size: 12px; color: var(--text-muted); margin-bottom: 8px; }
.settings-input { width: 100%; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border-input); background: rgba(0,0,0,0.3); color: var(--text-primary); font-size: 13px; font-family: 'JetBrains Mono', monospace; outline: none; }
.settings-input:focus { border-color: var(--accent-start); }
.settings-actions { display: flex; gap: 8px; margin-top: 12px; }
.btn-primary { flex: 1; padding: 8px 0; border-radius: 8px; border: none; background: linear-gradient(135deg, var(--accent-start), var(--accent-end)); color: #fff; font-size: 13px; font-weight: 600; cursor: pointer; }
.btn-secondary { flex: 1; padding: 8px 0; border-radius: 8px; border: 1px solid var(--border-input); background: transparent; color: #9ca3af; font-size: 13px; cursor: pointer; }

/* ─── Messages ─────────────────────────────────────── */
.messages { flex: 1; overflow-y: auto; padding: 20px 16px; display: flex; flex-direction: column; scroll-behavior: smooth; -webkit-overflow-scrolling: touch; }
.messages::-webkit-scrollbar { width: 4px; }
.messages::-webkit-scrollbar-track { background: transparent; }
.messages::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }

.msg { display: flex; flex-direction: column; margin-bottom: 16px; animation: fadeSlideIn 0.3s ease-out; }
.msg.user { align-items: flex-end; }
.msg.assistant { align-items: flex-start; }
.msg.other-user { align-items: flex-start; }

.msg-meta { font-size: 11px; color: var(--text-secondary); margin-bottom: 4px; font-family: 'JetBrains Mono', monospace; letter-spacing: 0.05em; text-transform: uppercase; display: flex; align-items: center; gap: 6px; }
.msg-time { opacity: 0.6; }

/* Star button */
.star-btn { background: none; border: none; font-size: 10px; cursor: pointer; opacity: 0.3; transition: opacity 0.2s; padding: 0 2px; }
.star-btn:active, .star-btn.starred { opacity: 1; }

.msg-bubble { max-width: 85%; padding: 12px 16px; font-size: 14px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; backdrop-filter: blur(10px); }
.msg.user .msg-bubble { border-radius: 16px 16px 4px 16px; background: linear-gradient(135deg, var(--accent-start), var(--accent-end)); color: #fff; }
.msg.assistant .msg-bubble { border-radius: 16px 16px 16px 4px; background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border); }
.msg.other-user .msg-bubble { border-radius: 16px 16px 16px 4px; background: rgba(59, 130, 246, 0.12); color: var(--text-primary); border: 1px solid rgba(59, 130, 246, 0.2); }

.msg-status { margin-bottom: 6px; font-size: 12px; opacity: 0.8; display: flex; align-items: center; gap: 6px; }
.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; }
.status-dot.thinking { background: var(--warning); animation: pulse 1.5s infinite; }
.status-dot.executing { background: var(--info); animation: pulse 1.5s infinite; }
.status-dot.done { background: var(--success); }
.status-dot.error { background: var(--error); }

.empty-state { text-align: center; color: var(--text-muted); padding: 40px 20px; font-size: 14px; }

/* ─── Input Area ───────────────────────────────────── */
.input-area { padding: 12px 16px 28px; border-top: 1px solid var(--border); background: rgba(15,17,23,0.9); backdrop-filter: blur(20px); display: flex; flex-direction: column; align-items: center; gap: 12px; }
.input-row { display: flex; gap: 8px; width: 100%; }
.text-input { flex: 1; padding: 12px 16px; border-radius: 24px; border: 1px solid var(--border-light); background: rgba(255,255,255,0.04); color: var(--text-primary); font-size: 14px; outline: none; font-family: 'Inter', -apple-system, sans-serif; transition: border-color 0.2s; }
.text-input:focus { border-color: var(--accent-start); }
.text-input::placeholder { color: var(--text-muted); }

.send-btn { padding: 0 20px; border-radius: 24px; border: none; background: rgba(255,255,255,0.06); color: #4b5563; font-size: 13px; font-weight: 600; cursor: default; transition: all 0.2s; }
.send-btn.active { background: linear-gradient(135deg, var(--accent-start), var(--accent-end)); color: #fff; cursor: pointer; }

/* Voice button */
.voice-btn { width: 88px; height: 88px; border-radius: 50%; border: none; background: linear-gradient(135deg, var(--accent-start), var(--accent-end)); color: #fff; font-size: 13px; font-weight: 600; cursor: pointer; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; transition: all 0.2s ease; box-shadow: 0 4px 24px rgba(99,102,241,0.3); font-family: 'Inter', -apple-system, sans-serif; touch-action: none; user-select: none; -webkit-user-select: none; }
.voice-btn.holding { background: linear-gradient(135deg, #ef4444, #f97316); transform: scale(1.15); box-shadow: 0 0 40px rgba(239,68,68,0.4), 0 0 80px rgba(239,68,68,0.15); }
.voice-btn-label { font-size: 10px; }

/* ─── Animations ───────────────────────────────────── */
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
@keyframes fadeSlideIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ─── v2: suggestion 消息样式 ─────────────────────── */
.msg.suggestion { align-self: flex-end; }
.msg.suggestion .msg-bubble {
  background: rgba(234, 179, 8, 0.15);
  border: 1px solid rgba(234, 179, 8, 0.3);
  border-radius: 16px 16px 4px 16px;
  color: var(--text-primary);
  font-style: italic;
}
.msg.suggestion .msg-meta { color: rgba(234, 179, 8, 0.8); }

/* v2: Observer 提示条 */
.role-hint {
  text-align: center; font-size: 11px; padding: 4px 0;
  color: rgba(234, 179, 8, 0.7); background: rgba(234, 179, 8, 0.08);
  border-radius: 8px; margin: 0 16px 4px;
}

/* v2: "发指令"按钮 */
.execute-btn {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff; border: none; border-radius: 20px;
  padding: 8px 16px; font-size: 13px; font-weight: 600;
  cursor: pointer; white-space: nowrap; flex-shrink: 0;
  font-family: 'Inter', -apple-system, sans-serif;
}

/* v2: 蒸馏面板 */
.distill-panel {
  margin: 0 12px 8px; padding: 12px; background: var(--card-bg);
  border: 1px solid rgba(234, 179, 8, 0.3); border-radius: 12px;
}
.distill-loading { text-align: center; color: var(--text-secondary); padding: 16px; animation: pulse 1.5s infinite; }
.distill-textarea {
  width: 100%; min-height: 80px; max-height: 200px; resize: vertical;
  background: var(--bg-primary); color: var(--text-primary);
  border: 1px solid var(--border-color); border-radius: 8px;
  padding: 8px; font-size: 14px; font-family: inherit;
}
.distill-actions { display: flex; gap: 8px; margin-top: 8px; justify-content: flex-end; }
.distill-btn {
  border: none; border-radius: 16px; padding: 6px 16px;
  font-size: 13px; font-weight: 600; cursor: pointer;
  font-family: 'Inter', -apple-system, sans-serif;
}
.distill-btn.cancel { background: var(--bg-secondary); color: var(--text-secondary); }
.distill-btn.confirm { background: linear-gradient(135deg, var(--accent-start), var(--accent-end)); color: #fff; }

/* ─── Safe area ────────────────────────────────────── */
@supports (padding-top: env(safe-area-inset-top)) {
  .header { padding-top: calc(16px + env(safe-area-inset-top)); }
  .sidebar-header { padding-top: calc(16px + env(safe-area-inset-top)); }
  .input-area { padding-bottom: calc(28px + env(safe-area-inset-bottom)); }
  .login-screen { padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom) 0; }
}