/* ======================================================================
   WeChat-style layout. Loaded AFTER styles.css, so it overrides the old look.
   Phone  : one full screen at a time, bottom tab bar, "‹" back, full-screen chat.
   Desktop: narrow icon rail + list column + chat column (like WeChat for PC).
   ====================================================================== */
:root{--wx-bg:#ededed;--wx-bar:#f7f7f7;--wx-green:#07c160;--wx-sent:#95ec69;--wx-line:#e5e5e5;--wx-text:#191919;--wx-sub:#8a8a8a;--wx-white:#fff;--wx-link:#576b95;--wx-red:#fa5151}
html,body{height:100%;background:var(--wx-bg);color:var(--wx-text);overscroll-behavior:none}
button{font-family:inherit}
.wx-app{display:flex;height:100vh;height:100dvh;min-height:0;overflow:hidden;background:var(--wx-bg);grid-template-columns:none}
.wx-app *{box-sizing:border-box}

/* ---------- avatars: rounded squares ---------- */
.avatar{border-radius:6px;background:#8a96a8;color:#fff;font-weight:600;font-size:13px}
.avatar.green{background:#5a9e6f}.avatar.orange{background:#d9944f}.avatar.violet{background:#8a7fb0}.avatar.navy{background:#4a6a85}
.avatar.profile{width:64px;height:64px;font-size:20px;background:#4a6a85}
.avatar.group{background:linear-gradient(135deg,#7fb5a4,#4f8f86)}
.avatar.small{width:40px;height:40px;margin-bottom:0;align-self:flex-start;font-size:12px}

/* ---------- columns ---------- */
.wx-col{display:flex;flex-direction:column;min-width:0;min-height:0;background:var(--wx-white)}
.wx-col-list{flex:0 0 100%;overflow:hidden}
.wx-col-chat{flex:0 0 100%;display:none;background:var(--wx-bg)}
.wx-rail{display:none}

/* phone: show exactly one column */
.wx-mode-chat .wx-col-list{display:none}
.wx-mode-chat .wx-col-chat{display:flex}

/* ---------- top navigation bar ---------- */
.wx-nav{position:relative;display:flex;align-items:center;flex:0 0 auto;height:calc(46px + env(safe-area-inset-top));padding:env(safe-area-inset-top) 6px 0;border-bottom:1px solid var(--wx-line);background:var(--wx-bar)}
.wx-nav h1{flex:1;margin:0;overflow:hidden;font-size:17px;font-weight:600;line-height:1.2;text-align:center;text-overflow:ellipsis;white-space:nowrap;letter-spacing:0}
.wx-nav-side{display:flex;flex:0 0 64px;align-items:center}
.wx-nav-side.right{justify-content:flex-end}
.wx-back{position:relative;display:flex;align-items:center;flex:0 0 64px;height:44px;padding:0 8px;border:0;background:none;color:var(--wx-text);font-size:34px;line-height:1;text-align:left;cursor:pointer}
.wx-back-badge,.wx-badge{min-width:18px;padding:0 5px;border-radius:9px;background:#c9c9c9;color:#fff;font-size:11px;font-weight:500;line-height:18px;text-align:center}
.wx-back-badge{margin-left:2px;background:#c9c9c9;font-size:12px}
.wx-badge.alert{background:var(--wx-red)}
.wx-nav .wx-title small{color:var(--wx-sub);font-weight:400}
.wx-nav.chat h1{display:flex;flex-direction:column;gap:1px}
.wx-nav.chat .wx-conn{display:block;color:var(--wx-sub);font-size:10px;font-weight:400;line-height:1}
.wx-nav.chat .wx-conn[data-status="online"]{display:none}
.wx-plus,.wx-more{width:44px;height:44px;border:0;background:none;color:var(--wx-text);font-size:26px;cursor:pointer}
.wx-more{font-size:22px;letter-spacing:1px}
.wx-link{border:0;background:none;color:var(--wx-link);font-size:15px;padding:0 8px;cursor:pointer}

/* ---------- search bar ---------- */
.wx-search{padding:8px 10px;background:var(--wx-bar)}
.wx-search-box{display:flex;align-items:center;justify-content:center;gap:6px;width:100%;height:34px;border:0;border-radius:6px;background:#fff;color:#a0a0a0;font-size:15px;cursor:pointer}
.wx-search-box span{font-size:16px}

/* ---------- lists / rows ---------- */
.wx-list{flex:1 1 auto;min-height:0;overflow-y:auto;background:var(--wx-white);-webkit-overflow-scrolling:touch}
.wx-chat-row{position:relative;width:100%;background:var(--wx-white)}
.wx-chat-row>.wx-row{padding-right:48px}
.wx-hide-chat{position:absolute;z-index:2;top:50%;right:9px;display:grid;place-items:center;width:28px;height:28px;padding:0;transform:translateY(-50%);border:0;border-radius:50%;background:rgba(0,0,0,.06);color:#888;font-size:21px;line-height:1;cursor:pointer;-webkit-tap-highlight-color:transparent}
.wx-hide-chat:hover,.wx-hide-chat:focus-visible{background:rgba(0,0,0,.12);color:#333;outline:none}
.wx-row{position:relative;display:flex;align-items:center;gap:12px;width:100%;padding:11px 14px;border:0;background:var(--wx-white);color:var(--wx-text);text-align:left;cursor:pointer;-webkit-tap-highlight-color:transparent}
.wx-row::after{content:"";position:absolute;left:72px;right:0;bottom:0;border-bottom:1px solid #efefef}
.wx-row:active,.wx-row.active{background:#d9d9d9}
.wx-row.static{cursor:default}.wx-row.static:active{background:var(--wx-white)}
.wx-ava{position:relative;display:flex;flex:0 0 auto}
.wx-ava .avatar{width:46px;height:46px}
.wx-ava .wx-badge{position:absolute;top:-6px;right:-7px;z-index:1}
.wx-row-main{display:flex;flex:1;flex-direction:column;gap:3px;min-width:0}
.wx-row-top{display:flex;align-items:baseline;justify-content:space-between;gap:8px}
.wx-row strong{overflow:hidden;font-size:16px;font-weight:400;text-overflow:ellipsis;white-space:nowrap}
.wx-row small{overflow:hidden;color:var(--wx-sub);font-size:13px;text-overflow:ellipsis;white-space:nowrap}
.wx-row time{flex:0 0 auto;color:#b2b2b2;font-size:12px}
.wx-row.special .wx-ava .wx-special{display:grid;place-items:center;width:46px;height:46px;border-radius:6px;color:#fff;font-size:22px;font-weight:700}
.wx-special.orange{background:#fa9d3b}.wx-special.green{background:#07c160}
.wx-letter{padding:4px 14px;background:var(--wx-bg);color:var(--wx-sub);font-size:13px}
.wx-count{padding:16px;color:var(--wx-sub);font-size:13px;text-align:center}
.wx-group-title{padding:14px 14px 6px;background:var(--wx-bg);color:var(--wx-sub);font-size:13px}
.wx-group-title:empty{height:10px;padding:0}
.wx-empty{padding:60px 24px;color:var(--wx-sub);font-size:14px;line-height:1.8;text-align:center}
.wx-empty.small{padding:36px 24px}
.wx-muted{flex:0 0 auto;color:var(--wx-sub);font-size:13px}
.wx-actions{display:flex;flex:0 0 auto;gap:6px}
.wx-btn{flex:0 0 auto;min-width:56px;height:32px;padding:0 12px;border:0;border-radius:5px;background:var(--wx-green);color:#fff;font-size:14px;cursor:pointer}
.wx-btn.ghost{background:#f2f2f2;color:var(--wx-text)}
.wx-btn.full{display:block;width:100%;height:42px;margin-top:12px;font-size:16px}
.wx-cell-icon.purple{background:#8a7fb0}
.wx-tag.solo{margin-left:6px;vertical-align:1px}
.wx-discover .wx-row small{max-width:100%}
/* admin: create group / add members, WeChat form-card look */
.wx-forms{background:var(--wx-bg)}
.wx-form-card{margin:0 0 10px;padding:4px 14px 14px;background:#fff}
.wx-form-head{display:flex;align-items:baseline;justify-content:space-between;padding:12px 0 4px}
.wx-form-head-actions{display:flex;align-items:center;gap:8px}.wx-group-members-admin{display:grid;gap:6px;padding:8px 0;border-top:1px solid #f0f0f0;border-bottom:1px solid #f0f0f0}.wx-admin-member{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:36px}.wx-admin-member>span{display:flex;align-items:center;gap:7px;min-width:0}.wx-admin-member .avatar{width:30px;height:30px;font-size:10px}.wx-admin-member strong{overflow:hidden;font-size:13px;font-weight:400;text-overflow:ellipsis;white-space:nowrap}.wx-admin-member small{color:var(--wx-sub);font-size:11px}
.wx-form-head small{color:var(--wx-sub);font-size:12px}
.wx-field{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid #f0f0f0;font-size:16px}
.wx-field span{flex:0 0 64px;color:var(--wx-text)}
.wx-field input{flex:1;min-width:0;border:0;background:transparent;font-size:16px;outline:0}
.wx-picks{max-height:46vh;overflow-y:auto}
.wx-pick{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid #f4f4f4;cursor:pointer}
.wx-pick input{position:absolute;opacity:0;pointer-events:none}
.wx-pick-box{flex:0 0 22px;width:22px;height:22px;border:1.5px solid #c8c8c8;border-radius:50%;background:#fff}
.wx-pick input:checked+.wx-pick-box{border-color:var(--wx-green);background:var(--wx-green) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M5 12.500l4.500 4.500L19 7.500' fill='none' stroke='%23fff' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/16px no-repeat}
.wx-pick .avatar{width:40px;height:40px}
.wx-pick .wx-row-main strong{font-size:16px;font-weight:400}
.wx-form-card .form-message{margin-top:8px;font-size:13px}
.wx-form-card .form-message.error{color:var(--wx-red)}
.wx-form-card .form-message.success{color:var(--wx-green)}
.wx-btn.small{min-width:0;height:28px;padding:0 9px;font-size:12px}
.wx-btn.gold{background:#fa9d3b}
.wx-row-actions{display:flex;flex:0 0 auto;flex-direction:column;align-items:flex-end;gap:6px}
.wx-btn:disabled{opacity:.5}

/* ---------- plus menu ---------- */
.wx-plus-menu{position:absolute;z-index:50;top:calc(52px + env(safe-area-inset-top));right:8px;width:158px;padding:4px 0;border-radius:6px;background:#4c4c4c;box-shadow:0 6px 20px rgba(0,0,0,.25)}
.wx-plus-menu[hidden]{display:none}
.wx-plus-menu::before{content:"";position:absolute;top:-6px;right:14px;border:6px solid transparent;border-top:0;border-bottom-color:#4c4c4c}
.wx-plus-menu button{display:flex;align-items:center;gap:12px;width:100%;height:46px;padding:0 16px;border:0;background:none;color:#fff;font-size:15px;text-align:left;cursor:pointer}
.wx-plus-menu button:active{background:#3a3a3a}
.wx-plus-menu i{width:20px;font-size:18px;font-style:normal;text-align:center}

/* ---------- add friend ---------- */
.wx-search-form{display:flex;align-items:center;gap:8px;margin:0;padding:10px;background:var(--wx-bar)}
.wx-search-form span{position:absolute;margin-left:12px;color:#a0a0a0}
.wx-search-form input{flex:1;height:36px;padding:0 12px 0 34px;border:0;border-radius:6px;background:#fff;color:var(--wx-text);font-size:16px;outline:0}
.wx-search-form button{height:36px;padding:0 14px;border:0;border-radius:6px;background:var(--wx-green);color:#fff;font-size:15px;cursor:pointer}
.wx-hint{margin:0;padding:8px 14px;background:var(--wx-bar);color:var(--wx-sub);font-size:13px}.wx-hint b{color:var(--wx-text)}

/* ---------- cells (discover / me) ---------- */
.wx-cell{display:flex;align-items:center;gap:14px;width:100%;height:54px;padding:0 14px;border:0;border-bottom:1px solid #f0f0f0;background:#fff;color:var(--wx-text);font-size:16px;text-align:left;cursor:pointer}
.wx-cell:active{background:#d9d9d9}
.wx-cell>span:nth-child(2){flex:1}
.wx-cell i{color:#c4c4c4;font-size:22px;font-style:normal}
.wx-cell em{color:var(--wx-sub);font-size:14px;font-style:normal}
.wx-cell-icon{display:grid;place-items:center;width:30px;height:30px;border-radius:6px;color:#fff;font-size:17px}
.wx-cell-icon.green{background:#07c160}.wx-cell-icon.orange{background:#fa9d3b}.wx-cell-icon.blue{background:#10aeff}.wx-cell-icon.gray{background:#8a8a8a}.wx-cell-icon.red{background:#fa5151}
.wx-cell.danger{color:var(--wx-red)}.wx-cell.center{justify-content:center}
.wx-me-card{display:flex;align-items:center;gap:16px;padding:calc(28px + env(safe-area-inset-top)) 18px 24px;background:#fff}
.wx-me-card div{display:flex;flex-direction:column;gap:8px}
.wx-me-card strong{font-size:22px;font-weight:600}
.wx-me-card span{color:var(--wx-sub);font-size:14px}
.wx-tag{margin-left:8px;padding:1px 6px;border-radius:3px;background:#fde8d7;color:#c2650a;font-size:11px;font-style:normal}
.wx-foot{margin:0;padding:18px;color:var(--wx-sub);font-size:12px;text-align:center}

/* ---------- bottom tab bar ---------- */
.wx-tabbar{position:absolute;left:0;right:0;bottom:0;z-index:30;display:flex;height:calc(56px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);border-top:1px solid var(--wx-line);background:var(--wx-bar)}
.wx-tab{display:flex;flex:1;flex-direction:column;align-items:center;justify-content:center;gap:2px;border:0;background:none;color:#191919;font-size:11px;cursor:pointer;-webkit-tap-highlight-color:transparent}
.wx-tab-icon{position:relative;display:block;width:28px;height:28px}
.wx-tab-icon svg{width:28px;height:28px;fill:#7a7a7a}
.wx-tab.active{color:var(--wx-green)}.wx-tab.active svg{fill:var(--wx-green)}
.wx-tab-icon .wx-badge{position:absolute;top:-4px;left:16px}
.wx-app:not(.wx-mode-chat) .wx-col-list{padding-bottom:calc(56px + env(safe-area-inset-bottom))}
.wx-mode-page .wx-tabbar{display:none}
.wx-mode-page .wx-col-list{padding-bottom:0}
.wx-placeholder{display:none}

/* ---------- chat ---------- */
.wx-col-chat{position:relative}
.messages{flex:1 1 auto;height:auto;min-height:0;padding:6px 12px 12px;overflow-y:auto;background:var(--wx-bg);scroll-behavior:auto;overscroll-behavior:contain}
.message-row{gap:9px;margin:16px 0;align-items:flex-start}
.message-bubble-wrap{max-width:min(76%,520px)}
.sender-name,.sender-name.green,.sender-name.orange,.sender-name.violet,.sender-name.navy{margin:0 0 3px 2px;color:#7a7a7a;font-size:12px}
.sender-name strong{font-weight:400}.sender-name small{color:#b0b0b0}
.message-bubble{position:relative;display:inline-block;max-width:100%;padding:10px 13px;border-radius:6px;background:#fff;color:var(--wx-text);font-size:16px;line-height:1.5;text-align:left;box-shadow:none}
.message-row:not(.mine) .message-bubble::before{content:"";position:absolute;top:13px;left:-5px;border:5px solid transparent;border-right-color:#fff;border-left:0}
.message-row.mine .message-bubble{border-radius:6px;background:var(--wx-sent);color:var(--wx-text)}
.message-row.mine .message-bubble::before{content:"";position:absolute;top:13px;right:-5px;border:5px solid transparent;border-left-color:var(--wx-sent);border-right:0}
.message-row.recalled{justify-content:center}
.message-row.recalled .avatar{display:none}
.message-row.recalled .message-bubble-wrap{max-width:100%}
.message-row.recalled .message-bubble{display:block;padding:0;background:transparent;color:#a0a0a0;font-size:12px;font-style:normal;text-align:center}
.message-row.recalled .message-bubble::before,.message-row.recalled .sender-name,.message-row.recalled time{display:none}
.message-bubble-wrap time{display:block;margin-top:3px;color:#b2b2b2;font-size:11px}
.message-row.mine .message-bubble-wrap{text-align:right}
.message-link{color:var(--wx-link);text-decoration:none}
.message-image{border:0;border-radius:6px;object-fit:cover}
.message-file{border-radius:6px;background:#fff}.message-row.mine .message-file{background:#fff}
.history-button{display:block;margin:6px auto 12px;padding:5px 14px;border:0;border-radius:12px;background:rgba(0,0,0,.06);color:var(--wx-link);font-size:13px}

/* composer */
.composer{display:flex;flex-direction:column;flex:0 0 auto;margin:0;padding:6px 10px calc(6px + env(safe-area-inset-bottom));gap:4px;border:0;border-top:1px solid var(--wx-line);border-radius:0;background:var(--wx-bar);min-height:0}
.composer-row{display:flex;align-items:center;gap:8px}
.composer-row input[name="message"]{flex:1;min-width:0;height:38px;padding:0 10px;border:0;border-radius:6px;background:#fff;color:var(--wx-text);font-size:16px;outline:0}
.composer .composer-icon{display:grid;place-items:center;flex:0 0 38px;width:38px;height:38px;min-height:0;padding:0;border:1.5px solid #333;border-radius:50%;background:transparent;color:#333;font-size:22px;line-height:1}
.composer .send-button{flex:0 0 auto;width:auto;min-width:58px;height:38px;padding:0 14px;border:0;border-radius:6px;background:var(--wx-green);color:#fff;font-size:15px;font-weight:600}
.composer .ttl-select{order:2;align-self:flex-start;height:22px;padding:0;border:0;background:transparent;color:var(--wx-sub);font-size:11px}
.composer-row{order:1}

/* group members panel */
.wx-members{flex:0 0 auto;max-height:46vh;overflow-y:auto;padding:0;border-bottom:1px solid var(--wx-line);background:#fff}
.wx-members-head{display:flex;align-items:center;justify-content:space-between;padding:12px 14px 4px}
.wx-members-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(76px,1fr));gap:12px 6px;padding:8px 10px 14px}
.wx-member{display:flex;flex-direction:column;align-items:center;gap:3px;text-align:center}
.wx-member .avatar{width:48px;height:48px}
.wx-member strong{max-width:100%;overflow:hidden;font-size:12px;font-weight:400;text-overflow:ellipsis;white-space:nowrap}
.wx-member small{color:var(--wx-sub);font-size:10px}
.wx-member-act .mini-action{padding:2px 8px;border:0;border-radius:4px;background:var(--wx-green);color:#fff;font-size:11px}
.wx-member-act .friend-ok,.wx-member-act .member-muted{font-size:10px;color:var(--wx-sub)}

/* modals / toast */
.toast{border:0;border-radius:8px;background:rgba(0,0,0,.78);color:#fff}
.primary-small,.primary-button{border-radius:6px;background:var(--wx-green)}

/* ====================== desktop: three columns ====================== */
@media(min-width:821px){
  .wx-app{background:var(--wx-bg)}
  .wx-rail{display:flex;flex:0 0 64px;flex-direction:column;align-items:center;gap:6px;padding:18px 0 14px;background:#2e2e2e}
  .wx-rail-me{margin-bottom:14px}
  .wx-rail-me .avatar.profile{width:38px;height:38px;font-size:13px}
  .wx-rail-btn{position:relative;display:grid;place-items:center;width:44px;height:44px;border:0;border-radius:8px;background:transparent;cursor:pointer}
  .wx-rail-btn svg{width:26px;height:26px;fill:#8d8d8d}
  .wx-rail-btn:hover{background:#3b3b3b}
  .wx-rail-btn.active svg{fill:var(--wx-green)}
  .wx-rail-gap{flex:1}
  .wx-rail .wx-tab-icon{width:26px;height:26px}
  .wx-rail .wx-badge{left:14px}
  .wx-col-list{flex:0 0 300px;display:flex;border-right:1px solid var(--wx-line);background:#e9e9e9}
  .wx-col-list .wx-list,.wx-col-list .wx-search{background:#e9e9e9}
  .wx-col-list .wx-nav{background:#e9e9e9;height:52px;padding-top:0;border-bottom:0}
  .wx-col-list .wx-row{background:#e9e9e9}
  .wx-col-list .wx-row:hover{background:#dedede}
  .wx-col-list .wx-row.active{background:#c9c9c9}
  .wx-col-list .wx-row::after{display:none}
  .wx-col-list .wx-search-box{background:#dcdcdc}
  .wx-col-list .wx-cell{background:#e9e9e9}
  .wx-col-chat{display:flex;flex:1 1 auto;min-width:0;background:var(--wx-bg)}
  .wx-mode-chat .wx-col-list,.wx-mode-chat .wx-col-chat{display:flex}
  .wx-tabbar{display:none}
  .wx-app:not(.wx-mode-chat) .wx-col-list,.wx-mode-page .wx-col-list{padding-bottom:0}
  .wx-placeholder{display:flex;flex:1;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:#b5b5b5}
  .wx-logo{display:grid;place-items:center;width:72px;height:72px;border-radius:16px;background:#dcdcdc;color:#fff;font-size:34px}
  .wx-col-chat .wx-nav{background:var(--wx-bg);height:56px;padding-top:0}
  .wx-col-chat .wx-back{display:none}
  .wx-col-chat .wx-nav-side{flex-basis:64px}
  .wx-col-chat .wx-nav h1{font-size:17px}
  .message-bubble-wrap{max-width:min(60%,560px)}
  .wx-tab-label{display:none}
  .composer{padding-bottom:8px}
  .wx-plus-menu{top:50px}
}

/* Multi-line composer: long Chinese text wraps like WeChat and grows only
   within the chat bar, keeping the message history readable above it. */
.composer-row{align-items:flex-end}
.composer-row textarea[name="message"]{display:block;flex:1;min-width:0;width:100%;min-height:38px;max-height:132px;margin:0;padding:8px 10px;border:0;border-radius:6px;background:#fff;color:var(--wx-text);font:inherit;font-size:16px;line-height:1.35;outline:0;resize:none;overflow-y:hidden;overflow-wrap:anywhere;white-space:pre-wrap}
.composer-row textarea[name="message"]::placeholder{color:var(--wx-sub)}
@media(max-width:820px){
  .app-shell.chat-view .composer-row textarea[name="message"]{min-height:38px;max-height:108px;padding:8px 10px;font-size:16px;line-height:1.35}
}