/* ============================================================
   对话工作台 chat.css · 全屏应用布局 · 移动端抽屉
   ============================================================ */
html,body{height:100%}
body.chat-page{overflow:hidden;background:#F3F5FB}

.chat-layout{display:flex;height:100dvh;padding-top:var(--nav-h)}

/* ---------- 侧栏 ---------- */
.chat-side{width:272px;flex-shrink:0;background:#fff;border-right:1px solid var(--line);
  display:flex;flex-direction:column;transition:transform .32s cubic-bezier(.22,1,.3,1);z-index:30}
.side-top{padding:14px}
.btn-new{width:100%;justify-content:center}
.side-search{margin:0 14px 10px;position:relative}
.side-search input{width:100%;padding:9px 12px 9px 34px;border-radius:10px;border:1.4px solid var(--line);background:#F7F8FC;font-size:.86rem}
.side-search input:focus{border-color:var(--primary);background:#fff}
.side-search svg{position:absolute;left:11px;top:50%;transform:translateY(-50%);width:15px;height:15px;color:var(--ink-3)}
.side-list{flex:1;overflow-y:auto;padding:4px 10px 16px}
.conv-item{display:flex;align-items:center;gap:9px;padding:10px 12px;border-radius:12px;cursor:pointer;
  color:var(--ink-2);font-size:.9rem;transition:.15s;margin-bottom:2px;position:relative}
.conv-item:hover{background:var(--bg-soft)}
.conv-item.cur{background:rgba(61,90,254,.09);color:var(--primary);font-weight:600}
.conv-item svg{width:16px;height:16px;flex-shrink:0;opacity:.7}
.conv-item span{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.conv-del,.conv-ren{opacity:0;width:26px;height:26px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--ink-3);flex-shrink:0}
.conv-item:hover .conv-del,.conv-item:hover .conv-ren{opacity:1}
@media(hover:none){.conv-del,.conv-ren{opacity:.55}}
.conv-del:hover{background:rgba(239,68,68,.12);color:var(--err)}
.conv-ren:hover{background:rgba(61,90,254,.12);color:var(--primary)}
.side-foot{padding:12px 14px;border-top:1px solid var(--line);font-size:.78rem;color:var(--ink-3);
  display:flex;justify-content:space-between;align-items:center}
.side-foot a{color:var(--primary);font-weight:600}

/* ---------- 主区 ---------- */
.chat-main{flex:1;display:flex;flex-direction:column;min-width:0;position:relative}
.chat-top{display:flex;align-items:center;gap:10px;padding:10px 18px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.86);backdrop-filter:blur(10px)}
.side-toggle{display:none;width:36px;height:36px;border-radius:10px;align-items:center;justify-content:center;color:var(--ink-2)}
.side-toggle svg{width:20px;height:20px}
@media(max-width:900px){
  .chat-side{position:fixed;top:var(--nav-h);bottom:0;left:0;transform:translateX(-105%);box-shadow:var(--shadow-l)}
  .chat-side.open{transform:none}
  .side-mask{position:fixed;inset:var(--nav-h) 0 0 0;background:rgba(18,22,48,.4);z-index:25;opacity:0;pointer-events:none;transition:.3s}
  .side-mask.show{opacity:1;pointer-events:auto}
  .side-toggle{display:flex}
}
.model-pill{display:inline-flex;align-items:center;gap:7px;padding:8px 14px;border-radius:12px;border:1.4px solid var(--line);background:#fff;font-weight:700;font-size:.88rem;cursor:pointer;transition:.2s;max-width:52vw}
.model-pill:hover{border-color:var(--primary)}
.model-pill .dot{background:var(--ok)}
.model-pill small{color:var(--ink-3);font-weight:600}
@media(max-width:520px){.model-pill small{display:none}}

.chat-msgs{flex:1;overflow-y:auto;padding:26px 0 20px;scroll-behavior:smooth}
.msg-wrap{max-width:820px;margin:0 auto;padding:0 20px;display:flex;flex-direction:column;gap:26px}
@media(max-width:640px){.msg-wrap{padding:0 14px}}
.msg{display:flex;gap:12px;animation:msgIn .35s cubic-bezier(.22,1,.3,1)}
@keyframes msgIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.msg .avatar{width:34px;height:34px;flex-shrink:0;margin-top:2px}
.msg-body{flex:1;min-width:0}
.msg-role{font-size:.8rem;font-weight:700;color:var(--ink-3);margin-bottom:5px}
.msg-bubble{padding:13px 17px;border-radius:16px;font-size:.95rem;line-height:1.75;color:var(--ink-2);word-break:break-word}
.msg.user .msg-bubble{background:var(--grad-main);color:#fff;border-top-left-radius:5px;margin-left:auto;max-width:88%;width:fit-content}
.msg.user{flex-direction:row-reverse}
.msg.ai .msg-bubble{background:#fff;border:1px solid var(--line);border-top-left-radius:5px;box-shadow:var(--shadow-s)}
.msg-bubble p{margin:0 0 .6em}
.msg-bubble p:last-child{margin-bottom:0}
.msg-bubble ul,.msg-bubble ol{margin:.4em 0 .6em;padding-left:1.4em}
.msg-bubble ul{list-style:disc}.msg-bubble ol{list-style:decimal}
.msg-bubble h1,.msg-bubble h2,.msg-bubble h3{margin:.6em 0 .4em;color:var(--ink);font-weight:800}
.msg-bubble h1{font-size:1.15rem}.msg-bubble h2{font-size:1.05rem}.msg-bubble h3{font-size:1rem}
.msg-bubble blockquote{border-left:3px solid var(--primary);background:rgba(61,90,254,.06);
  padding:8px 12px;border-radius:0 10px 10px 0;margin:.5em 0;font-size:.9em}
.msg-bubble code{background:rgba(61,90,254,.08);color:var(--primary-deep);padding:1.5px 6px;border-radius:6px;font-family:var(--mono);font-size:.85em}
.msg-bubble pre{background:#101430;color:#DCE2FF;border-radius:12px;padding:14px 16px;overflow-x:auto;margin:.6em 0;font-size:.84rem;line-height:1.65}
.msg-bubble pre code{background:none;color:inherit;padding:0}
.code-block{margin:.6em 0}
.code-block pre{margin:0;border-top-left-radius:0}
.code-bar{display:flex;align-items:center;justify-content:space-between;background:#1B2050;color:#9AA4E0;
  border-radius:12px 12px 0 0;padding:6px 12px;font-size:.72rem;font-family:var(--mono)}
.code-copy{background:rgba(255,255,255,.1);color:#DCE2FF;border:1px solid rgba(255,255,255,.16);border-radius:7px;
  padding:3px 10px;font-size:.72rem;cursor:pointer;transition:.2s}
.code-copy:hover{background:rgba(255,255,255,.22)}
.msg-bubble hr{border:none;border-top:1px dashed var(--line);margin:.8em 0}
.msg-bubble table{border-collapse:collapse;margin:.5em 0;font-size:.86em}
.msg-bubble td,.msg-bubble th{border:1px solid var(--line);padding:5px 10px}
.msg-bubble em{color:var(--ink-3);font-size:.85em;font-style:normal}
.msg-actions{display:flex;gap:6px;margin-top:8px;opacity:.65}
.msg-actions button{font-size:.75rem;color:var(--ink-3);padding:4px 9px;border-radius:8px}
.msg-actions button:hover{background:var(--bg-soft);color:var(--primary)}

/* 搜索卡片 */
.search-card{border:1px solid var(--line);background:#fff;border-radius:14px;padding:13px 15px;margin-bottom:10px;animation:msgIn .35s}
.search-card b{font-size:.8rem;color:var(--primary);display:flex;gap:6px;align-items:center;margin-bottom:9px}
.search-card .si{display:flex;flex-direction:column;gap:2px;padding:7px 0;border-top:1px dashed var(--line)}
.search-card .si:first-of-type{border-top:none}
.search-card .si b2{font-size:.85rem;color:var(--ink);font-weight:600}
.search-card .si small{color:var(--ink-3);font-size:.78rem;line-height:1.5}
/* 思考过程 */
.think-card{border:1px dashed rgba(124,77,255,.4);background:rgba(124,77,255,.05);border-radius:14px;padding:12px 15px;margin-bottom:10px;font-size:.86rem;color:var(--ink-2)}
.think-card b{display:flex;gap:6px;align-items:center;color:var(--violet);font-size:.8rem;margin-bottom:6px}
.think-card .spinner.dark{width:13px;height:13px;border-width:2px}
/* 使用提示 */
.usage-tip{font-size:.75rem;color:var(--ink-3);margin-top:8px;display:flex;gap:12px}

/* 欢迎屏 */
.chat-welcome{max-width:820px;margin:0 auto;padding:7vh 20px 0;text-align:center}
.chat-welcome .logo-big{width:64px;height:64px;border-radius:18px;background:var(--grad-main);margin:0 auto 18px;
  display:flex;align-items:center;justify-content:center;box-shadow:0 10px 30px rgba(80,70,255,.35);animation:float 5s ease-in-out infinite}
.chat-welcome .logo-big svg{width:34px;height:34px}
.chat-welcome h2{font-size:1.5rem;font-weight:900;margin-bottom:8px}
.chat-welcome p{color:var(--ink-3);font-size:.92rem;margin-bottom:28px}
.welcome-recs{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;text-align:left}
@media(max-width:640px){.welcome-recs{grid-template-columns:1fr}}
.welcome-recs button{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px;font-size:.9rem;
  color:var(--ink-2);transition:.2s;line-height:1.5;text-align:left}
.welcome-recs button:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-s)}

/* ---------- 输入区 ---------- */
.chat-inputbar{padding:12px 20px calc(14px + env(safe-area-inset-bottom));background:linear-gradient(180deg,rgba(243,245,251,0),#F3F5FB 30%)}
.inputbox{max-width:820px;margin:0 auto;background:#fff;border:1.5px solid var(--line);border-radius:20px;
  padding:12px 14px 9px;box-shadow:var(--shadow-m);transition:.25s}
.inputbox:focus-within{border-color:var(--primary);box-shadow:0 10px 32px rgba(61,90,254,.18)}
.inputbox textarea{width:100%;border:none;background:transparent;resize:none;font-size:.97rem;line-height:1.6;min-height:44px;max-height:150px}
.inputbox-tools{display:flex;align-items:center;gap:7px;flex-wrap:wrap}
.stop-btn{display:none;align-items:center;gap:7px;padding:8px 16px;border-radius:12px;border:1.4px solid var(--err);color:var(--err);font-weight:700;font-size:.85rem}
.stop-btn.show{display:inline-flex}