/* ╔══════════════════════════════════════════╗
   ║  即时通讯 v3 — 旗舰级UI样式             ║
   ║  Design: Premium Glassmorphism + WeChat  ║
   ╚══════════════════════════════════════════╝ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  /* 主色 */
  --primary: #07c160;
  --primary-dark: #06ad56;
  --primary-light: #e8f8ef;
  --primary-glow: rgba(7,193,96,0.25);
  /* 语义色 */
  --danger: #fa5151;
  --warning: #ffc300;
  --info: #10aeff;
  --gold: #f59e0b;
  --purple: #7c3aed;
  /* 中性 */
  --bg: #f0f2f5;
  --bg-white: #ffffff;
  --bg-card: #ffffff;
  --text: #191919;
  --text-secondary: #8e8e93;
  --text-muted: #c7c7cc;
  --border: #e5e5ea;
  --divider: #f2f2f7;
  /* 阴影 */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.10);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.14);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.18);
  /* 圆角 */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  /* 过渡 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --fast: 0.15s;
  --normal: 0.25s;
  --slow: 0.4s;
  /* 字体 */
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

[data-theme="dark"] {
  --bg: #0a0a0a;
  --bg-white: #1c1c1e;
  --bg-card: #1c1c1e;
  --text: #f5f5f7;
  --text-secondary: #98989d;
  --text-muted: #636366;
  --border: #2c2c2e;
  --divider: #2c2c2e;
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.6);
}

*{margin:0;padding:0;box-sizing:border-box}
html{height:100%}
body{
  font-family:var(--font);
  font-size:15px;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  height:100vh;overflow:hidden;
  letter-spacing:-0.01em;
}

/* ══════════════════════════════════
   登录/注册 - 顶级品牌感
   ══════════════════════════════════ */
.auth-page{
  display:flex;align-items:center;justify-content:center;
  min-height:100vh;padding:20px;
  background: radial-gradient(ellipse at 20% 50%, #667eea15 0%, transparent 50%),
              radial-gradient(ellipse at 80% 20%, #764ba215 0%, transparent 50%),
              radial-gradient(ellipse at 50% 80%, #07c16010 0%, transparent 50%),
              linear-gradient(135deg, #0f0f23 0%, #1a1a3e 30%, #0d1b2a 60%, #1b0a2e 100%);
  position:relative;overflow:hidden;
}
.auth-page::before{
  content:'';position:absolute;
  width:600px;height:600px;
  background:radial-gradient(circle,rgba(7,193,96,0.08),transparent 70%);
  border-radius:50%;top:-200px;right:-200px;pointer-events:none;
}
.auth-page::after{
  content:'';position:absolute;
  width:400px;height:400px;
  background:radial-gradient(circle,rgba(124,58,237,0.06),transparent 70%);
  border-radius:50%;bottom:-150px;left:-150px;pointer-events:none;
}
.auth-container{width:100%;max-width:420px;position:relative;z-index:1}
.auth-card{
  background:rgba(255,255,255,0.07);
  backdrop-filter:blur(40px) saturate(180%);
  -webkit-backdrop-filter:blur(40px) saturate(180%);
  border-radius:var(--radius-xl);
  padding:44px 36px;
  box-shadow:var(--shadow-xl),inset 0 1px 0 rgba(255,255,255,0.1);
  border:1px solid rgba(255,255,255,0.12);
  animation:cardIn 0.6s var(--ease);
}
@keyframes cardIn{from{opacity:0;transform:translateY(30px) scale(0.95)}to{opacity:1;transform:translateY(0) scale(1)}}

.auth-header{text-align:center;margin-bottom:36px}
.auth-logo{
  width:72px;height:72px;margin:0 auto 20px;
  background:linear-gradient(135deg,var(--primary),#34d399);
  border-radius:var(--radius-lg);
  display:flex;align-items:center;justify-content:center;
  font-size:36px;box-shadow:0 8px 32px var(--primary-glow);
}
.auth-header h2{font-size:28px;font-weight:700;color:#fff;margin-bottom:6px}
.auth-header p{font-size:15px;color:rgba(255,255,255,0.6)}

.auth-tabs{display:flex;background:rgba(255,255,255,0.06);border-radius:var(--radius-full);padding:3px;margin-bottom:28px}
.auth-tabs .tab{
  flex:1;text-align:center;padding:10px 0;font-size:14px;font-weight:500;
  color:rgba(255,255,255,0.5);border-radius:var(--radius-full);cursor:pointer;
  transition:all var(--normal) var(--ease);
}
.auth-tabs .tab.active{background:rgba(255,255,255,0.15);color:#fff;font-weight:600}

.form-group{margin-bottom:20px}
.form-group label{
  display:block;font-size:13px;font-weight:500;
  color:rgba(255,255,255,0.6);margin-bottom:8px;letter-spacing:0.02em;
}
.form-group input,.form-group textarea{
  width:100%;padding:14px 18px;
  background:rgba(255,255,255,0.06);
  border:1px solid rgba(255,255,255,0.1);
  border-radius:var(--radius-sm);font-size:15px;color:#fff;
  transition:all var(--normal) var(--ease);
  font-family:var(--font);
}
.form-group input:focus,.form-group textarea:focus{
  outline:none;border-color:var(--primary);
  box-shadow:0 0 0 4px rgba(7,193,96,0.12);
  background:rgba(255,255,255,0.1);
}
.form-group input::placeholder{color:rgba(255,255,255,0.25)}

.error-msg{color:var(--danger);font-size:13px;min-height:22px;margin-bottom:4px}

.auth-footer{text-align:center;margin-top:24px;font-size:14px;color:rgba(255,255,255,0.4)}
.auth-footer a{color:var(--primary);text-decoration:none;font-weight:500;transition:color var(--fast)}
.auth-footer a:hover{color:#34d399}
.auth-footer span{margin:0 10px;opacity:0.3}

/* ══════════════════════════════════
   按钮系统
   ══════════════════════════════════ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:12px 24px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;
  cursor:pointer;border:none;transition:all var(--normal) var(--ease);
  letter-spacing:0.01em;position:relative;overflow:hidden;
}
.btn::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,0.1),transparent);pointer-events:none}
.btn-primary{background:linear-gradient(135deg,var(--primary),#34d399);color:#fff;box-shadow:0 4px 16px var(--primary-glow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(7,193,96,0.35)}
.btn-primary:active{transform:scale(0.97)}
.btn-danger{background:linear-gradient(135deg,var(--danger),#ff7043);color:#fff;box-shadow:0 4px 16px rgba(250,81,81,0.25)}
.btn-outline{
  background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.15);
  color:#fff
}
.btn-outline:hover{background:rgba(255,255,255,0.12)}
.btn-full{width:100%}
.btn-sm{padding:7px 16px;font-size:13px}
.btn-lg{padding:16px 32px;font-size:17px}
.btn-send{padding:11px 28px;border-radius:var(--radius-full)}

/* ══════════════════════════════════
   主布局
   ══════════════════════════════════ */
.main-layout{display:flex;height:100vh;max-width:1400px;margin:0 auto}

/* 侧边栏 */
.sidebar{
  width:340px;background:var(--bg-card);border-right:1px solid var(--border);
  display:flex;flex-direction:column;flex-shrink:0;
}
.sidebar-header{
  display:flex;align-items:center;padding:20px 16px;gap:12px;
  background:linear-gradient(180deg,var(--bg-card),var(--divider));
}
.user-avatar{
  width:44px;height:44px;border-radius:var(--radius-full);overflow:hidden;
  flex-shrink:0;box-shadow:var(--shadow-xs);border:2px solid var(--primary-light);
  transition:transform var(--fast);
}
.user-avatar:hover{transform:scale(1.05)}
.user-avatar img{width:100%;height:100%;object-fit:cover}
.user-info{flex:1}
.user-info span{font-size:17px;font-weight:700}
.header-actions{display:flex;gap:4px}
.header-actions button{
  width:38px;height:38px;border-radius:var(--radius-full);border:none;
  background:transparent;font-size:20px;cursor:pointer;
  transition:all var(--fast);display:flex;align-items:center;justify-content:center;
}
.header-actions button:hover{background:var(--border)}

/* 搜索框 */
.search-bar{padding:12px 16px}
.search-bar input{
  width:100%;padding:10px 16px 10px 38px;
  background:var(--bg);border:1px solid transparent;
  border-radius:var(--radius-full);font-size:14px;color:var(--text);
  transition:all var(--normal);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%238e8e93' viewBox='0 0 16 16'%3E%3Cpath d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1.007 1.007 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0z'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:14px center;
}
.search-bar input:focus{outline:none;border-color:var(--primary);background-color:var(--bg-white)}

/* 会话列表 */
.session-list{flex:1;overflow-y:auto;padding:4px 12px}
.session-item{
  display:flex;align-items:center;padding:14px;margin:2px 0;gap:12px;
  cursor:pointer;border-radius:var(--radius-md);
  transition:all var(--fast);position:relative;
}
.session-item:hover{background:var(--divider)}
.session-item.active{background:var(--primary-light)}
.session-item .s-avatar{
  width:52px;height:52px;border-radius:var(--radius-md);
  overflow:hidden;flex-shrink:0;position:relative;
}
.session-item .s-avatar img{width:100%;height:100%;object-fit:cover}
.session-item .s-avatar .online-dot{
  position:absolute;bottom:2px;right:2px;width:10px;height:10px;
  border-radius:50%;background:var(--primary);border:2px solid var(--bg-card);
}
.session-item .s-info{flex:1;min-width:0}
.session-item .s-name{font-size:16px;font-weight:600;margin-bottom:2px;display:flex;align-items:center;gap:6px}
.session-item .s-name .mute-icon{font-size:12px;color:var(--text-muted)}
.session-item .s-last{font-size:13px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.session-item .s-meta{text-align:right;flex-shrink:0}
.session-item .s-time{font-size:11px;color:var(--text-muted);font-weight:500}
.session-item .s-badge{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:20px;height:20px;line-height:20px;text-align:center;
  background:var(--danger);color:#fff;font-size:11px;font-weight:700;
  border-radius:10px;padding:0 6px;margin-top:6px;
  box-shadow:0 2px 8px rgba(250,81,81,0.3);
  animation:badgeIn 0.3s var(--ease);
}
@keyframes badgeIn{from{transform:scale(0)}to{transform:scale(1)}}

/* 聊天区 */
.chat-area{flex:1;display:flex;flex-direction:column;background:var(--bg);min-width:0}
.chat-empty{
  flex:1;display:flex;flex-direction:column;align-items:center;
  justify-content:center;color:var(--text-muted);
}
.chat-empty .empty-icon{
  font-size:80px;margin-bottom:20px;opacity:0.6;
  animation:float 3s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.chat-empty h3{font-size:22px;color:var(--text-secondary);margin-bottom:6px}
.chat-empty p{font-size:15px;color:var(--text-muted)}

.chat-view{flex:1;display:flex;flex-direction:column}
.chat-header{
  display:flex;align-items:center;padding:14px 20px;
  background:var(--bg-card);border-bottom:1px solid var(--border);gap:12px;
  box-shadow:var(--shadow-xs);
}
.btn-back{display:none;background:none;border:none;font-size:22px;cursor:pointer;padding:4px 8px;border-radius:var(--radius-xs)}
.btn-back:hover{background:var(--divider)}
.chat-peer-info{display:flex;align-items:center;gap:10px;flex:1}
.peer-avatar{width:40px;height:40px;border-radius:50%;overflow:hidden;flex-shrink:0}
.peer-avatar img{width:100%;height:100%;object-fit:cover}
.peer-detail span{display:block;font-size:16px;font-weight:700}
.peer-detail small{font-size:12px;color:var(--text-muted)}
.chat-header-actions button{
  width:36px;height:36px;border:none;background:transparent;
  font-size:22px;cursor:pointer;border-radius:var(--radius-xs);transition:all var(--fast);
}
.chat-header-actions button:hover{background:var(--divider)}

/* 消息区 */
.chat-messages{
  flex:1;overflow-y:auto;padding:20px;
  display:flex;flex-direction:column;gap:2px;
  background:var(--bg);
}
.msg-row{display:flex;margin-bottom:12px;animation:msgIn 0.25s var(--ease)}
@keyframes msgIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.msg-row.self{justify-content:flex-end}
.msg-row .msg-content{max-width:72%}
.msg-row .msg-avatar{
  width:36px;height:36px;border-radius:50%;overflow:hidden;flex-shrink:0;
  margin:0 10px;align-self:flex-end;
}
.msg-row .msg-avatar img{width:100%;height:100%;object-fit:cover}

.msg-bubble{
  padding:11px 16px;border-radius:var(--radius-lg);font-size:15px;
  line-height:1.55;word-break:break-word;position:relative;
  transition:box-shadow var(--fast);
}
.msg-row.other .msg-bubble{
  background:var(--bg-white);color:var(--text);
  border-top-left-radius:4px;box-shadow:var(--shadow-xs);
}
.msg-row.self .msg-bubble{
  background:linear-gradient(135deg,var(--primary),#34d399);
  color:#fff;border-top-right-radius:4px;
  box-shadow:0 2px 12px rgba(7,193,96,0.2);
}
.msg-row .msg-name{font-size:12px;color:var(--primary);font-weight:600;margin-bottom:4px}
.msg-row .msg-time{font-size:11px;color:var(--text-muted);margin-top:6px}
.msg-row.self .msg-time{text-align:right}
.msg-row .msg-status{font-size:11px;margin-top:2px;font-weight:500}
.msg-row.self .msg-status{text-align:right;color:rgba(255,255,255,0.7)}
.msg-row.other .msg-status{text-align:left;color:var(--text-muted)}

/* 特殊消息卡片 */
.msg-recalled{background:transparent!important;box-shadow:none!important;color:var(--text-muted)!important;font-style:italic;font-size:13px}

.msg-image{max-width:240px;max-height:240px;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--fast);box-shadow:var(--shadow-sm)}
.msg-image:hover{transform:scale(1.02);box-shadow:var(--shadow-md)}

.msg-location-card{
  background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:12px;text-decoration:none;color:var(--text);display:flex;align-items:center;
  gap:10px;box-shadow:var(--shadow-xs);cursor:pointer
}
.msg-location-card .loc-pin{font-size:28px}
.msg-location-card .loc-info b{display:block;font-size:14px;font-weight:600}
.msg-location-card .loc-info em{font-size:12px;color:var(--text-muted);font-style:normal}
.msg-location-card .loc-btn{background:var(--primary);color:#fff;padding:5px 14px;border-radius:var(--radius-xs);font-size:13px;font-weight:600}

.msg-transfer-card{
  background:linear-gradient(135deg,#fff9e6,#fff3cd);border:1px solid #ffc107;
  border-radius:var(--radius-sm);padding:14px;box-shadow:var(--shadow-xs);
  display:flex;align-items:center;gap:10px;
}
.msg-transfer-card .tf-symbol{font-size:32px;color:var(--gold)}
.msg-transfer-card .tf-info b{display:block;font-size:18px;color:#e67e00}
.msg-transfer-card .tf-info em{font-size:12px;color:var(--text-muted);font-style:normal}

.msg-redpacket-card{
  background:linear-gradient(135deg,#f99d3a,#f85542);color:#fff;
  border-radius:var(--radius-sm);padding:14px;text-align:center;
  cursor:pointer;box-shadow:0 4px 16px rgba(249,157,58,0.3);
  transition:all var(--fast);
}
.msg-redpacket-card:hover{transform:scale(1.02);box-shadow:0 6px 20px rgba(249,157,58,0.4)}
.msg-redpacket-card .rp-icon{font-size:28px}
.msg-redpacket-card .rp-msg{font-size:14px;margin-top:4px}
.msg-redpacket-card .rp-count{font-size:12px;opacity:0.9;margin-top:2px}

.msg-audio{
  display:inline-flex;align-items:center;gap:8px;cursor:pointer;
  min-width:80px;padding:4px 0
}

/* 输入区 */
.chat-input-area{
  background:var(--bg-card);border-top:1px solid var(--border);
  padding:10px 16px;padding-bottom:calc(10px + var(--safe-bottom));
  box-shadow:0 -2px 12px rgba(0,0,0,0.04);
}
.input-toolbar{display:flex;gap:2px;margin-bottom:10px;flex-wrap:wrap}
.tool-btn{
  background:none;border:none;font-size:18px;padding:6px 10px;cursor:pointer;
  border-radius:var(--radius-xs);transition:all var(--fast);color:var(--text-secondary);
}
.tool-btn:hover{background:var(--divider);color:var(--text);transform:translateY(-1px)}
.tool-btn:active{transform:scale(0.9)}
.input-row{display:flex;gap:10px;align-items:center}
.msg-input{
  flex:1;padding:12px 18px;border:2px solid var(--border);
  border-radius:var(--radius-full);font-size:15px;background:var(--bg);color:var(--text);
  transition:all var(--normal);line-height:1.4;
}
.msg-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(7,193,96,0.08)}

/* 模态框 */
.modal-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,0.6);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  z-index:1000;display:flex;align-items:center;justify-content:center;
  animation:fadeIn 0.2s;
}
.modal-dialog{
  background:var(--bg-card);border-radius:var(--radius-lg);padding:28px;
  min-width:340px;max-width:92vw;max-height:85vh;overflow-y:auto;
  box-shadow:var(--shadow-xl);
  animation:slideUp 0.35s var(--ease);
}
.modal-dialog h3{font-size:20px;font-weight:700;margin-bottom:20px;text-align:center}
.modal-actions{display:flex;gap:12px;justify-content:center;margin-top:24px}

/* 图片预览 */
.image-preview{
  position:fixed;inset:0;background:rgba(0,0,0,0.96);
  z-index:2000;display:flex;align-items:center;justify-content:center;
}
.image-preview img{max-width:94vw;max-height:94vh;object-fit:contain;border-radius:var(--radius-sm)}
.preview-close{
  position:absolute;top:24px;right:24px;width:44px;height:44px;
  background:rgba(255,255,255,0.15);border-radius:50%;border:none;
  color:#fff;font-size:26px;cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:all var(--fast);
}
.preview-close:hover{background:rgba(255,255,255,0.25)}

/* 长按菜单 */
.context-menu{
  position:fixed;background:var(--bg-card);border-radius:var(--radius-sm);
  box-shadow:var(--shadow-lg);z-index:1500;min-width:150px;padding:6px;
  animation:slideUp 0.2s var(--ease);border:1px solid var(--border);
}
.context-menu .menu-item{
  padding:10px 16px;font-size:14px;cursor:pointer;display:flex;align-items:center;gap:8px;
  border-radius:var(--radius-xs);transition:all var(--fast);
}
.context-menu .menu-item:hover{background:var(--divider)}
.context-menu .menu-item.danger{color:var(--danger)}

/* WS连接状态 */
.ws-status{
  position:fixed;top:12px;right:50%;transform:translateX(50%);
  padding:6px 20px;border-radius:var(--radius-full);
  font-size:13px;font-weight:600;z-index:999;
  transition:all var(--normal);pointer-events:none;
}
.ws-status.connecting{background:#fff3cd;color:#856404}
.ws-status.connected{background:var(--primary-light);color:var(--primary);opacity:0;transition-delay:2s}

/* 通话浮层 */
.call-overlay{
  position:fixed;inset:0;background:#000;z-index:3000;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
}
.call-overlay .remote-video{width:100%;flex:1;object-fit:cover}
.call-overlay .local-video{
  position:absolute;top:20px;right:20px;width:120px;height:170px;
  border-radius:var(--radius-sm);border:2px solid rgba(255,255,255,0.3);
  object-fit:cover;background:#333;
}
.call-overlay .call-status{color:#fff;font-size:18px;margin:20px 0}
.call-overlay .call-controls{display:flex;gap:20px;margin-bottom:60px}
.call-overlay .call-btn{
  width:56px;height:56px;border-radius:50%;border:none;font-size:24px;
  cursor:pointer;transition:all var(--fast);display:flex;align-items:center;justify-content:center;
}
.call-overlay .call-btn:hover{transform:scale(1.08)}
.call-overlay .call-btn.hangup{background:var(--danger);color:#fff}
.call-overlay .call-btn.mute{background:rgba(255,255,255,0.15);color:#fff}

/* 动画 */
@keyframes slideUp{from{opacity:0;transform:translateY(40px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

/* 响应式 */
@media(max-width:768px){
  .sidebar{position:absolute;z-index:10;width:100%;height:100vh;transition:transform 0.3s var(--ease)}
  .sidebar.hidden{transform:translateX(-100%)}
  .btn-back{display:block}
  .msg-row .msg-content{max-width:85%}
  .auth-card{padding:36px 24px}
}

/* 滚动条 */
::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:rgba(0,0,0,0.12);border-radius:2px}
[data-theme="dark"] ::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.1)}