/* Trợ lý Viết Như Hơi Thở™ */
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.vnht-chat{position:fixed;right:clamp(16px,2.3vw,34px);bottom:clamp(82px,8vw,108px);z-index:1100;font-family:"Be Vietnam Pro",Arial,sans-serif;color:#2f1c1d}
.vnht-chat-launcher{display:flex;align-items:center;gap:11px;min-height:58px;padding:8px 17px 8px 9px;border:1px solid rgba(122,34,51,.15);border-radius:999px;background:#85263b;color:#fff;box-shadow:0 13px 35px rgba(74,25,34,.23);cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}
.vnht-chat-launcher:hover{transform:translateY(-2px);background:#722033;box-shadow:0 16px 38px rgba(74,25,34,.3)}
.vnht-chat-launcher:focus-visible,.vnht-chat button:focus-visible,.vnht-chat textarea:focus-visible{outline:3px solid rgba(197,101,67,.38);outline-offset:3px}
.vnht-chat-launcher-icon{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:#fff6ed;color:#85263b;font-family:Georgia,serif;font-size:21px}
.vnht-chat-launcher-label{display:grid;gap:2px;text-align:left;line-height:1.15}
.vnht-chat-launcher-label b{font-size:14px;font-weight:700}
.vnht-chat-launcher-label small{font-size:11px;color:rgba(255,255,255,.8)}
.vnht-chat-panel{position:absolute;right:0;bottom:0;display:flex;flex-direction:column;width:min(390px,calc(100vw - 28px));height:min(650px,calc(100vh - 110px));overflow:hidden;border:1px solid rgba(96,53,43,.16);border-radius:22px;background:#fffdf9;box-shadow:0 24px 70px rgba(54,29,27,.22);opacity:0;visibility:hidden;transform:translateY(14px) scale(.97);transform-origin:bottom right;transition:opacity .22s ease,transform .22s ease,visibility .22s ease}
.vnht-chat.is-open .vnht-chat-panel{opacity:1;visibility:visible;transform:translateY(0) scale(1)}
.vnht-chat.is-open .vnht-chat-launcher{opacity:0;visibility:hidden;pointer-events:none}
.vnht-chat-header{display:flex;align-items:center;justify-content:space-between;padding:15px 16px;background:#85263b;color:#fff}
.vnht-chat-header>div{display:flex;align-items:center;gap:11px;min-width:0}
.vnht-chat-mark{display:grid;place-items:center;flex:0 0 39px;width:39px;height:39px;border-radius:50%;background:#fff8ef;color:#85263b;font-family:Georgia,serif;font-size:21px;font-weight:700}
.vnht-chat-header p{display:grid;gap:4px;margin:0;line-height:1.2}
.vnht-chat-header strong{font-family:"Literata",Georgia,serif;font-size:14px;font-weight:700}
.vnht-chat-header small{display:flex;align-items:center;gap:6px;color:rgba(255,255,255,.83);font-size:11px}
.vnht-chat-header small i{width:7px;height:7px;border-radius:50%;background:#83d6a1;box-shadow:0 0 0 3px rgba(131,214,161,.15)}
.vnht-chat-close{display:grid;place-items:center;width:36px;height:36px;border:0;border-radius:50%;background:rgba(255,255,255,.1);color:#fff;font-size:25px;line-height:1;cursor:pointer}
.vnht-chat-messages{flex:1;display:flex;flex-direction:column;gap:12px;overflow-y:auto;padding:17px 15px 12px;scrollbar-width:thin;scrollbar-color:#d8c4b7 transparent}
.vnht-chat-message{display:flex;max-width:91%;animation:vnht-message-in .2s ease both}
.vnht-chat-message.is-user{align-self:flex-end;justify-content:flex-end}
.vnht-chat-message.is-assistant{align-self:flex-start}
.vnht-chat-bubble{padding:11px 13px;border-radius:16px;background:#f4ede5;border:1px solid rgba(105,64,52,.09)}
.vnht-chat-message.is-user .vnht-chat-bubble{background:#85263b;border-color:#85263b;color:#fff;border-bottom-right-radius:5px}
.vnht-chat-message.is-assistant .vnht-chat-bubble{border-bottom-left-radius:5px}
.vnht-chat-bubble p{margin:0;white-space:pre-line;font-size:14px;line-height:1.57}
.vnht-chat-actions{display:flex;flex-wrap:wrap;gap:7px;margin-top:10px}
.vnht-chat-actions button,.vnht-chat-suggestions button{border:1px solid rgba(133,38,59,.27);border-radius:999px;background:#fffaf5;color:#762238;font:600 12px/1.35 "Be Vietnam Pro",Arial,sans-serif;cursor:pointer;transition:background .18s ease,color .18s ease,border-color .18s ease}
.vnht-chat-actions button{padding:7px 9px}
.vnht-chat-actions button:hover,.vnht-chat-suggestions button:hover{border-color:#85263b;background:#85263b;color:#fff}
.vnht-chat-suggestions{display:flex;gap:7px;overflow-x:auto;padding:4px 15px 11px;scrollbar-width:none}
.vnht-chat-suggestions::-webkit-scrollbar{display:none}
.vnht-chat-suggestions[hidden]{display:none}
.vnht-chat-suggestions button{flex:0 0 auto;max-width:210px;padding:8px 10px;text-align:left}
.vnht-chat-tools{padding:0 15px 6px}
.vnht-chat-show-prompts{padding:3px 0;border:0;background:transparent;color:#8a594b;font:600 11px "Be Vietnam Pro",Arial,sans-serif;cursor:pointer}
.vnht-chat-form{display:flex;align-items:flex-end;gap:8px;margin:0 12px;padding:8px 8px 8px 13px;border:1px solid #d9c8bc;border-radius:16px;background:#fff}
.vnht-chat-form:focus-within{border-color:#9d5364;box-shadow:0 0 0 3px rgba(133,38,59,.08)}
.vnht-chat-form textarea{flex:1;min-height:24px;max-height:96px;resize:none;padding:2px 0;border:0;outline:0;background:transparent;color:#2f1c1d;font:14px/1.45 "Be Vietnam Pro",Arial,sans-serif}
.vnht-chat-form textarea::placeholder{color:#9b847b}
.vnht-chat-form button{display:grid;place-items:center;flex:0 0 36px;width:36px;height:36px;border:0;border-radius:50%;background:#85263b;color:#fff;font-size:20px;font-weight:700;cursor:pointer}
.vnht-chat-note{margin:6px 0 9px;text-align:center;color:#9c887f;font-size:10px;line-height:1.3}
@keyframes vnht-message-in{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:650px){
 .vnht-chat{right:12px;bottom:78px}
 .vnht-chat-launcher{min-height:52px;padding:6px 13px 6px 7px}
 .vnht-chat-launcher-icon{width:38px;height:38px}
 .vnht-chat-panel{position:fixed;right:8px;bottom:70px;left:8px;width:auto;height:min(620px,calc(100dvh - 90px));border-radius:20px}
 .vnht-chat-launcher-label small{display:none}
}
@media(prefers-reduced-motion:reduce){.vnht-chat-panel,.vnht-chat-launcher,.vnht-chat-message{transition:none;animation:none}}