:root{--primary: #10b981;--primary-dark: #059669;--bg: #f1f4f3;--panel: #ffffff;--text: #1f2937;--muted: #9ca3af;--bubble-self: #95ec69;--bubble-other: #ffffff;--danger: #ef4444;--safe-bottom: env(safe-area-inset-bottom, 0px)}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#app{height:100%}body{font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Helvetica Neue,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);font-size:15px;overscroll-behavior:none}button{font-family:inherit;border:none;cursor:pointer;background:none;color:inherit}input,textarea{font-family:inherit;border:none;outline:none;background:none}img{-webkit-user-drag:none}.chat-shell{height:100dvh;display:flex;flex-direction:column;background:var(--bg)}@media (min-width: 720px){.chat-shell{max-width:560px;margin:0 auto;box-shadow:0 0 40px #00000014}}.toast-wrap{position:fixed;top:calc(env(safe-area-inset-top,0px) + 14px);left:50%;transform:translate(-50%);z-index:999;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}.toast{max-width:82vw;background:#111827e6;color:#fff;padding:9px 16px;border-radius:10px;font-size:14px;word-break:break-all}.toast.error{background:#dc2626eb}.toast.success{background:#059669eb}.toast-enter-active,.toast-leave-active{transition:all .25s ease}.toast-enter-from,.toast-leave-to{opacity:0;transform:translateY(-8px)}.btn-primary{background:var(--primary);color:#fff;border-radius:12px;padding:12px 18px;font-size:15px;font-weight:600;transition:background .15s}.btn-primary:active{background:var(--primary-dark)}.btn-primary:disabled{opacity:.55}.field{background:#f3f4f6;border-radius:12px;padding:13px 14px;font-size:15px;width:100%}