:root{
  --bg: #0b0f14;
  --panel: #0f1624;
  --panel2: #0c1320;
  --text: #e6edf3;
  --muted: rgba(230,237,243,.68);
  --border: rgba(230,237,243,.10);
  --chip: rgba(230,237,243,.08);

  --primary: #4f8cff;
  --primary2: rgba(79,140,255,.16);

  --shadow: 0 14px 50px rgba(0,0,0,.42);
  --shadow2: 0 10px 26px rgba(0,0,0,.28);

  --radius: 14px;
  --radius2: 18px;

  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --ease: cubic-bezier(.2,.8,.2,1);
}

[data-theme="light"]{
  --bg: #f6f7fb;
  --panel: #ffffff;
  --panel2: #ffffff;
  --text: #0b1220;
  --muted: rgba(11,18,32,.62);
  --border: rgba(11,18,32,.10);
  --chip: rgba(11,18,32,.06);

  --primary: #2563eb;
  --primary2: rgba(37,99,235,.12);

  --shadow: 0 16px 44px rgba(0,0,0,.10);
  --shadow2: 0 10px 24px rgba(0,0,0,.08);
}

*{ box-sizing: border-box; }
html, body{ 
  height: 100%;
  margin: 0;
  padding: 0;
  /* 核心修改：禁止整个窗口滚动 */
  overflow: hidden; 
  /* 针对 iOS 的修复，防止橡皮筋回弹效果 */
  position: fixed; 
  width: 100%;}
body{
  margin:0;
  background: radial-gradient(1200px 800px at 20% -10%, rgba(79,140,255,.12), transparent 60%),
              radial-gradient(900px 700px at 90% 0%, rgba(122,92,255,.10), transparent 55%),
              var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a{ color: var(--primary); text-decoration: none; }
a:hover{ text-decoration: underline; }

::selection{ background: rgba(79,140,255,.28); }

.app{
  height:100%;
  display:flex;
}

/* ---------- Scrollbar ---------- */
*::-webkit-scrollbar{ height: 10px; width: 10px; }
*::-webkit-scrollbar-thumb{
  background: rgba(255,255,255,.12);
  border: 2px solid transparent;
  background-clip: padding-box;
  border-radius: 999px;
}
[data-theme="light"] *::-webkit-scrollbar-thumb{
  background: rgba(11,18,32,.18);
  border: 2px solid transparent;
  background-clip: padding-box;
}


/* ---------- Sidebar ---------- */
.sidebar{
  width: 320px;
  background: linear-gradient(180deg, var(--panel), rgba(0,0,0,0) 70%), var(--panel);
  border-right: 1px solid var(--border);
  padding: 14px;
  display:flex;
  flex-direction: column;
  gap: 14px;
}

.sidebar-top{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 10px;
}

.brand{
  font-weight: 800;
  letter-spacing: .3px;
  cursor: pointer;
  border-radius: 10px;
  padding: 6px 8px;
  transition: background .15s var(--ease);
}

.brand:hover,
.brand:focus-visible{
  background: color-mix(in srgb, var(--chip) 82%, transparent);
  outline: none;
}

.sidebar-section{
  background: color-mix(in srgb, var(--panel2) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  box-shadow: none;
}

.sidebar-section.plain{
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
}

.sidebar-section.grow{
  flex:1;
  overflow:hidden;
  display:flex;
  flex-direction: column;
}

.sidebar-label{
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
}

.model-row{
  display:flex;
  gap: 8px;
  align-items:center;
}

.select{
  width: 100%;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 10px;
  outline: none;
  transition: border-color .18s var(--ease), background .18s var(--ease);
}
.select:focus{
  border-color: rgba(79,140,255,.55);
  background: rgba(79,140,255,.06);
}
.select option{ color: #111; }

.hint{
  margin-top: 8px;
  font-size: 12px;
  color: var(--muted);
  min-height: 16px;
}

.chat-list{
  display:flex;
  flex-direction: column;
  gap: 2px;
  overflow:auto;
  padding-right: 2px;
}

.project-new-btn{
  width: 100%;
  justify-content: flex-start;
  margin-bottom: 8px;
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 14px;
}

.project-list{
  display:flex;
  flex-direction: column;
  gap: 2px;
  max-height: 160px;
  overflow: auto;
  padding-right: 2px;
}

.project-item{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 10px;
  min-height: 32px;
  padding: 6px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  transition: background .15s var(--ease), border-color .15s var(--ease), color .15s var(--ease);
}

.project-item:hover{
  background: color-mix(in srgb, var(--chip) 84%, transparent);
}

.project-item.active{
  border-color: transparent;
  background: color-mix(in srgb, var(--primary2) 80%, transparent);
}

.project-item-title{
  font-size: 14px;
  font-weight: 500;
  overflow:hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  flex: 1;
}

.project-item-meta{
  font-size: 12px;
  color: var(--muted);
  flex-shrink: 0;
}

.project-item-actions{
  display: flex;
  align-items: center;
}

.project-delete-btn{
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  border-radius: 8px;
  font-size: 12px;
  line-height: 1;
  padding: 4px 6px;
  cursor: pointer;
  opacity: 0;
  transition: opacity .15s var(--ease), background .15s var(--ease), color .15s var(--ease);
}

.project-item:hover .project-delete-btn,
.project-item.active .project-delete-btn{
  opacity: 1;
}

.project-delete-btn:hover{
  background: var(--chip);
  color: #f87171;
}

.chat-header-row{
  display:flex;
  align-items:center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.chat-manage-btn{
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
}

.chat-batch-bar{
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
  margin-bottom: 8px;
  display:flex;
  flex-direction: column;
  gap: 8px;
  background: color-mix(in srgb, var(--panel2) 84%, transparent);
}

.chat-batch-actions{
  display:flex;
  gap: 6px;
  flex-wrap: wrap;
}

.chat-batch-actions .btn{
  padding: 6px 10px;
  font-size: 12px;
}

.chat-item-left{
  display:flex;
  align-items:center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.chat-select-box{
  width: 16px;
  height: 16px;
  margin: 0;
}

.chat-project-tag{
  font-size: 11px;
  color: var(--muted);
  flex-shrink: 0;
}

.chat-menu-wrap{
  position: relative;
}

.chat-menu-btn{
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity .15s var(--ease), background .15s var(--ease), color .15s var(--ease);
}

.chat-menu-btn:hover{
  background: var(--chip);
  color: var(--text);
}

.chat-item:hover .chat-menu-btn,
.chat-item.active .chat-menu-btn,
.chat-menu-wrap.open .chat-menu-btn,
.chat-item.selecting .chat-menu-btn{
  opacity: 1;
}

.chat-menu{
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  min-width: 140px;
  padding: 6px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 96%, transparent);
  box-shadow: var(--shadow2);
  display:flex;
  flex-direction: column;
  gap: 4px;
  z-index: 20;
}

.chat-menu-item{
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  text-align: left;
  font-size: 12px;
  padding: 6px 8px;
  cursor: pointer;
}

.chat-menu-item:hover{
  background: var(--chip);
  border-color: var(--border);
}

.chat-rename-input{
  width: 100%;
  border: 1px solid color-mix(in srgb, var(--primary) 65%, var(--border));
  background: color-mix(in srgb, var(--panel2) 90%, transparent);
  color: var(--text);
  border-radius: 8px;
  font-size: 13px;
  padding: 4px 8px;
  outline: none;
}

.floating-menu{
  position: fixed;
  z-index: 1200;
}

.floating-menu-panel{
  min-width: 160px;
  max-height: 320px;
  overflow: auto;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 96%, transparent);
  box-shadow: var(--shadow);
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.floating-menu-item{
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  text-align: left;
  padding: 8px 10px;
  font-size: 13px;
  cursor: pointer;
}

.floating-menu-item:hover{
  background: var(--chip);
  border-color: var(--border);
}

.floating-menu-item.danger{
  color: #f87171;
}

.floating-menu-empty{
  padding: 8px 10px;
  font-size: 12px;
  color: var(--muted);
}

.floating-menu-label{
  padding: 6px 8px 2px 8px;
  font-size: 12px;
  color: var(--muted);
}

.floating-menu-input{
  width: 100%;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel2) 92%, transparent);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 13px;
  outline: none;
}

.floating-menu-input:focus{
  border-color: color-mix(in srgb, var(--primary) 65%, var(--border));
}

.floating-menu-actions{
  display: flex;
  justify-content: flex-end;
  gap: 6px;
}

.chat-item{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 10px;
  min-height: 36px;
  padding: 7px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  cursor:pointer;
  transition: background .15s var(--ease), border-color .15s var(--ease);
}

.chat-item:hover{
  background: color-mix(in srgb, var(--chip) 84%, transparent);
}

.chat-item.active{
  border-color: transparent;
  background: color-mix(in srgb, var(--primary2) 80%, transparent);
}

.chat-item.selecting{
  background: color-mix(in srgb, var(--chip) 66%, transparent);
}

.chat-item.dragging{
  opacity: .45;
}

.chat-item.drag-over{
  border-color: color-mix(in srgb, var(--primary) 70%, var(--border));
  background: color-mix(in srgb, var(--primary2) 70%, transparent);
}

.chat-title{
  font-size: 14px;
  color: var(--text);
  overflow:hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  flex: 1;
}

.chat-actions{
  display:flex;
  gap: 6px;
  align-items: center;
}

.sidebar-bottom{
  display:flex;
  justify-content: flex-end;
}

/* ---------- Main ---------- */
.main{
  flex:1;
  display:flex;
  flex-direction: column;
  min-width: 0;
}

.view{
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.view[hidden]{
  display: none;
}

.topbar{
  height: 56px;
  display:flex;
  align-items:center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
}

.topbar-title{
  font-weight: 650;
  overflow:hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.topbar-actions{ display:flex; gap: 8px; }

/* ---------- Account ---------- */
.account-content{
  flex: 1;
  overflow: auto;
  padding: 20px 20px 28px 20px;
  animation: viewFade .2s var(--ease) both;
}

.account-hero{
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: linear-gradient(120deg, rgba(79,140,255,.18), rgba(10,16,26,.7));
  box-shadow: var(--shadow2);
}

.account-identity{
  display:flex;
  align-items: center;
  gap: 14px;
}

.account-meta{
  display:flex;
  flex-direction: column;
  gap: 4px;
}

.account-avatar{
  width: 48px;
  height: 48px;
  border-radius: 16px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(160deg, #6aa1ff, #2b5fff);
  box-shadow: 0 10px 24px rgba(79,140,255,.35);
}

.account-name{
  font-weight: 700;
  font-size: 18px;
}

.account-sub{
  font-size: 12px;
  color: var(--muted);
}

.plan-pill{
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(79,140,255,.45);
  background: rgba(79,140,255,.16);
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.account-grid{
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.card{
  border-radius: 18px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, color-mix(in srgb, var(--panel) 94%, transparent), var(--panel));
  box-shadow: var(--shadow2);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: cardRise .28s var(--ease) both;
}

.account-grid .card:nth-child(1){ animation-delay: .02s; }
.account-grid .card:nth-child(2){ animation-delay: .05s; }
.account-grid .card:nth-child(3){ animation-delay: .08s; }
.account-grid .card:nth-child(4){ animation-delay: .11s; }

.card-title{
  font-weight: 650;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: .2px;
  text-transform: uppercase;
}

.points-main{
  display:flex;
  align-items: baseline;
  gap: 10px;
}

.points-num{
  font-size: 28px;
  font-weight: 750;
}

.points-label{
  font-size: 12px;
  color: var(--muted);
}

.points-bar{
  position: relative;
  height: 8px;
  border-radius: 999px;
  background: rgba(255,255,255,.08);
  overflow: hidden;
}

.points-bar-fill{
  height: 100%;
  background: linear-gradient(90deg, #6aa1ff, #7cc4ff);
  border-radius: 999px;
  width: 0%;
  transition: width .3s var(--ease);
}

.points-meta{
  display:flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted);
}

.points-reset{
  opacity: .9;
}

.status-row{
  display:flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--panel2) 90%, transparent);
  border: 1px solid var(--border);
}

.status-label{
  font-size: 12px;
  color: var(--muted);
}

.status-value{
  font-weight: 600;
}

.plan-grid{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.plan-tile{
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px;
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
  transition: transform .15s var(--ease), border-color .15s var(--ease), background .15s var(--ease);
}

.plan-tile:hover{
  transform: translateY(-1px);
  background: rgba(79,140,255,.08);
  border-color: rgba(79,140,255,.35);
}

.plan-tile.active{
  background: rgba(79,140,255,.16);
  border-color: rgba(79,140,255,.55);
  box-shadow: 0 8px 20px rgba(79,140,255,.18);
}

.plan-name{
  font-weight: 650;
  margin-bottom: 4px;
}

.plan-detail{
  font-size: 11px;
  color: var(--muted);
}

.auth-row{
  display:flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel2) 92%, transparent);
}

.auth-kind{
  display:flex;
  align-items:center;
  gap: 10px;
}

.auth-icon{
  width: 32px;
  height: 32px;
  border-radius: 10px;
  display:flex;
  align-items:center;
  justify-content:center;
  background: rgba(79,140,255,.18);
}

.auth-label{
  font-weight: 600;
}

.auth-desc{
  font-size: 12px;
  color: var(--muted);
}

.auth-actions{
  display:flex;
  align-items:center;
  gap: 10px;
}

.tag{
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.06);
  color: var(--muted);
}

.tag.ok{
  color: #7dd3fc;
  border-color: rgba(125,211,252,.35);
  background: rgba(125,211,252,.12);
}

.auth-note{
  font-size: 12px;
  color: var(--muted);
}

.usage-grid{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.usage-item{
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel2) 90%, transparent);
}

.usage-label{
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .6px;
}

.usage-value{
  margin-top: 6px;
  font-size: 20px;
  font-weight: 700;
}

.usage-hint{
  font-size: 12px;
  color: var(--muted);
}

.token-usage-summary{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 12px 0;
}

.token-usage-stat{
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel2) 90%, transparent);
}

.token-usage-label{
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .6px;
}

.token-usage-value{
  margin-top: 6px;
  font-size: 18px;
  font-weight: 700;
}

.token-usage-table{
  display: grid;
  gap: 8px;
}

.token-usage-row{
  display: grid;
  grid-template-columns: minmax(0, 2fr) repeat(3, minmax(0, 1fr));
  gap: 8px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel2) 88%, transparent);
  font-size: 12px;
}

.token-usage-row.token-usage-head{
  padding: 0 4px;
  border: none;
  background: transparent;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .6px;
  font-size: 11px;
}

.token-usage-model{
  font-weight: 600;
}

.token-usage-empty{
  padding: 12px;
  border-radius: 12px;
  border: 1px dashed var(--border);
  text-align: center;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 640px){
  .token-usage-summary{
    grid-template-columns: 1fr;
  }
  .token-usage-row{
    grid-template-columns: minmax(0, 1.2fr) repeat(3, minmax(0, .8fr));
    font-size: 11px;
  }
}

@keyframes viewFade{
  from{ opacity: 0; transform: translateY(6px); }
  to{ opacity: 1; transform: translateY(0); }
}

@keyframes cardRise{
  from{ opacity: 0; transform: translateY(10px) scale(.98); }
  to{ opacity: 1; transform: translateY(0) scale(1); }
}

/* ---------- Messages ---------- */
.messages{
  flex:1;
  overflow:auto;
  padding: 18px 18px 0 18px;
}

.messages::before{
  content:"";
  display:block;
  height: 10px;
}

.welcome-splash{
  min-height: calc(100vh - 260px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px 16px;
}

.welcome-title{
  margin: 0;
  font-size: clamp(30px, 4.2vw, 46px);
  line-height: 1.16;
  font-weight: 760;
  letter-spacing: .2px;
}

.welcome-subtitle{
  margin: 12px 0 0 0;
  font-size: 15px;
  color: var(--muted);
}

.msg{
  max-width: 920px;
  margin: 0 auto 14px auto;
  display:flex;
  gap: 12px;
  min-width: 0;
}

.avatar{
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display:flex;
  align-items:center;
  justify-content:center;
  background: color-mix(in srgb, var(--chip) 92%, transparent);
  border: 1px solid var(--border);
  flex: 0 0 auto;
  font-size: 12px;
  color: var(--muted);
}

.bubble{
  flex:1;
  background: linear-gradient(180deg, color-mix(in srgb, var(--panel) 92%, transparent), var(--panel));
  border: 1px solid var(--border);
  border-radius: var(--radius2);
  padding: 12px 14px;
  box-shadow: var(--shadow2);
  min-width: 0;
}

.msg.user .bubble{
  background: linear-gradient(180deg, rgba(79,140,255,.14), rgba(79,140,255,.08));
  border-color: rgba(79,140,255,.22);
}

.meta{
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
  display:flex;
  align-items:center;
  gap: 8px;
}

.text{
  white-space: pre-wrap;
  line-height: 1.68;
  font-size: 14px;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.text .markdown-content{
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.text .markdown-content p,
.text .markdown-content li,
.text .markdown-content a{
  overflow-wrap: anywhere;
  word-break: break-word;
}

.text .markdown-content a{
  white-space: normal;
}

.text .markdown-content .katex,
.text .markdown-content .katex * {
  white-space: nowrap !important;
  overflow-wrap: normal !important;
  word-break: normal !important;
}

.text .markdown-content .katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 2px 0;
}

.thinking-inline{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 2px 0 10px 0;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: .2px;
  transform-origin: left center;
  animation: thinkingFloat 1.9s ease-in-out infinite;
}

.thinking-inline-label{
  line-height: 1;
  animation: thinkingBreath 1.6s ease-in-out infinite;
}

.thinking-inline-ellipsis{
  display: inline-block;
  width: 6ch;
  text-align: left;
  white-space: nowrap;
  color: color-mix(in srgb, var(--primary) 86%, var(--text));
  letter-spacing: 1px;
}

@keyframes thinkingBreath {
  0%, 100% { opacity: .66; }
  50% { opacity: 1; }
}

@keyframes thinkingFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-1px); }
}

/* Rich blocks (for JS rendered code fences) */
.codewrap{
  margin-top: 10px;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow:hidden;
  background: color-mix(in srgb, var(--panel2) 92%, transparent);
}

.codebar{
  display:flex;
  justify-content: space-between;
  align-items:center;
  gap: 10px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 72%, transparent);
  color: var(--muted);
  font-size: 12px;
}

.codebar .lang{
  font-family: var(--mono);
  opacity: .9;
}

pre{
  margin: 0;
  padding: 12px 12px;
  overflow:auto;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.55;
}
code{ font-family: var(--mono); }

.inline-code{
  font-family: var(--mono);
  font-size: .95em;
  padding: 2px 6px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--chip);
}

/* Images in message */
.images{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.thumb{
  width: 168px;
  height: 116px;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid var(--border);
  cursor: zoom-in;
  background: var(--chip);
  transition: transform .15s var(--ease), box-shadow .15s var(--ease);
}
.thumb:hover{
  transform: translateY(-2px);
  box-shadow: var(--shadow2);
}

/* ---------- Composer ---------- */
.composer{
  padding: 14px 14px 18px 14px;
}

.composer-inner{
  max-width: 980px;
  margin: 0 auto;
  background: linear-gradient(180deg, color-mix(in srgb, var(--panel) 96%, transparent), var(--panel));
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 10px;
  box-shadow: var(--shadow);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}

.composer-inner:focus-within{
  border-color: rgba(79,140,255,.55);
  transform: translateY(-1px);
}

.composer-inner.dragover{
  outline: 2px dashed rgba(79,140,255,.45);
  outline-offset: 4px;
}

.attachments{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  padding: 4px 6px 8px 6px;
}

.attachment{
  display:flex;
  align-items:center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 14px;
  background: var(--chip);
  border: 1px solid var(--border);
}

.attachment img{
  width: 38px;
  height: 38px;
  border-radius: 12px;
  object-fit: cover;
  border: 1px solid var(--border);
}

.attachment .name{
  max-width: 220px;
  overflow:hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  font-size: 12px;
  color: var(--text);
}

.composer-row{
  display:flex;
  gap: 10px;
  align-items: flex-end;
  padding: 6px;
}

.input{
  flex:1;
  resize: none;
  background: transparent;
  color: var(--text);
  border: none;
  outline: none;
  font-size: 14px;
  line-height: 1.55;
  max-height: 180px;
}
.input::placeholder{ color: color-mix(in srgb, var(--muted) 80%, transparent); }

.composer-hint{
  padding: 0 8px 6px 8px;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- Buttons ---------- */
.btn{
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 12px;
  padding: 9px 12px;
  cursor:pointer;
  transition: background .15s var(--ease), transform .15s var(--ease), border-color .15s var(--ease), opacity .15s var(--ease);
  user-select: none;
}

.btn:hover{ background: var(--chip); transform: translateY(-1px); }
.btn:active{ transform: translateY(0px); }
.btn:disabled{ opacity: .55; cursor: not-allowed; transform: none; }

.btn-ghost{ background: transparent; }

.btn-primary{
  background: var(--primary);
  border-color: rgba(255,255,255,.0);
  color: white;
}
.btn-primary:hover{ filter: brightness(1.05); }

.btn-toggle[data-active="true"]{
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  border-color: color-mix(in srgb, var(--primary) 60%, var(--border));
  color: var(--primary);
}

.icon{ font-size: 16px; }

.mobile-only{ display:none; }

/* ---------- Modal ---------- */
.modal{
  position: fixed;
  inset: 0;
  display:none;
  align-items:center;
  justify-content:center;
  z-index: 1000;
}

.modal.show{ display:flex; }

.modal-backdrop{
  position:absolute;
  inset:0;
  background: rgba(0,0,0,.62);
  backdrop-filter: blur(4px);
}

.modal-content{
  position:relative;
  z-index:1;
  max-width: min(1200px, 94vw);
  max-height: min(820px, 90vh);
  border-radius: 18px;
  overflow: auto;
  background: rgba(0,0,0,.22);
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-overflow-scrolling: touch;
  animation: pop .14s var(--ease) both;
}
@keyframes pop{
  from{ transform: scale(.98); opacity: .2; }
  to{ transform: scale(1); opacity: 1; }
}

.modal-content img{
  width: auto;
  height: auto;
  max-width: none;
  max-height: none;
  display:block;
  flex: 0 0 auto;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(0,0,0,.12);
}

/* ---------- Responsive ---------- */
@media (max-width: 920px){
  .sidebar{
    position: fixed;
    left: 0; top: 0; bottom: 0;
    transform: translateX(-102%);
    transition: transform .2s var(--ease);
    z-index: 900;
    box-shadow: var(--shadow);
  }
  .sidebar.open{ transform: translateX(0); }
  .mobile-only{ display:inline-flex; }

  .messages{ padding: 16px 12px 0 12px; }
  .msg{ gap: 10px; }
  .thumb{ width: 46vw; height: 30vw; max-width: 210px; max-height: 140px; }

  .composer{ padding: 10px 10px 12px 10px; }

  .account-content{
    padding: 16px 14px 22px 14px;
  }

  .account-hero{
    flex-direction: column;
    align-items: flex-start;
  }

  .account-grid{
    grid-template-columns: 1fr;
  }

  .plan-grid{
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce){
  *{ transition: none !important; animation: none !important; }
}


/* ===== Auth Modal ===== */
.auth-modal{
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1200;
}
.auth-modal.show{ display: flex; }

.auth-backdrop{
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.62);
  backdrop-filter: blur(4px);
}

.auth-card{
  position: relative;
  z-index: 1;
  width: min(420px, 92vw);
  border-radius: 18px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, color-mix(in srgb, var(--panel) 96%, transparent), var(--panel));
  box-shadow: var(--shadow);
  padding: 14px;
}

.auth-title{
  font-weight: 750;
  margin-bottom: 10px;
}

.auth-tabs{
  display:flex;
  gap: 8px;
  margin-bottom: 12px;
}

.auth-tab{
  flex:1;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 12px;
  padding: 10px;
  cursor: pointer;
}
.auth-tab.active{
  border-color: rgba(79,140,255,.45);
  background: var(--primary2);
}

.auth-form{
  display:flex;
  flex-direction: column;
  gap: 10px;
}

.auth-input{
  width: 100%;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  outline: none;
}
.auth-input:focus{
  border-color: rgba(79,140,255,.55);
  background: rgba(79,140,255,.06);
}

.auth-hint{
  min-height: 16px;
  font-size: 12px;
  color: var(--muted);
}

/* ===== 代码块增强样式 ===== */
.code-block-wrapper {
  position: relative;
  margin: 12px 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: color-mix(in srgb, var(--panel2) 92%, transparent);
  border: 1px solid var(--border);
  box-shadow: var(--shadow2);
}

/* 代码块头部 */
.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: color-mix(in srgb, var(--panel) 72%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

/* 语言标签 */
.code-language {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.8px;
  opacity: 0.9;
}

/* 复制按钮 */
.code-copy-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--muted);
  font-size: 11px;
  cursor: pointer;
  transition: all 0.15s var(--ease);
  user-select: none;
}

.code-copy-btn:hover {
  background: var(--chip);
  border-color: rgba(79,140,255,.35);
  color: var(--text);
  transform: translateY(-1px);
}

.code-copy-btn:active {
  transform: translateY(0);
}

.code-copy-btn.copied {
  background: rgba(79,140,255,.18);
  border-color: rgba(79,140,255,.45);
  color: var(--primary);
}

.code-copy-btn svg {
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  opacity: 0.9;
}

/* 代码块内容区域 */
.code-block-wrapper pre {
  margin: 0;
  padding: 14px 14px;
  overflow-x: auto;
  background: transparent;
}

.code-block-wrapper code {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}

/* 行内代码保持原样 */
.text code:not(.code-block-wrapper code) {
  font-family: var(--mono);
  font-size: 0.95em;
  padding: 2px 6px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--chip);
}

/* Markdown 渲染内容的代码块适配 */
.markdown-content .code-block-wrapper {
  margin: 12px 0;
}

/* 移动端适配 */
@media (max-width: 920px) {
  .code-header {
    padding: 6px 10px;
  }
  
  .code-language {
    font-size: 10px;
  }
  
  .code-copy-btn {
    padding: 5px 8px;
    font-size: 10px;
  }
  
  .code-copy-btn svg {
    width: 12px;
    height: 12px;
  }
  
  .code-block-wrapper pre {
    padding: 12px 10px;
  }
  
  .code-block-wrapper code {
    font-size: 12px;
  }
}

/* 减少动效模式 */
@media (prefers-reduced-motion: reduce) {
  .code-copy-btn {
    transition: none !important;
  }
}