/* VTW AI Chatbot V5 Smart - fixed header/menu/input */
.vtw-ai-v4-launcher{position:fixed;right:22px;bottom:40px;width:58px;height:58px;border-radius:50%;background:#d80000;color:#fff;display:flex;align-items:center;justify-content:center;font-size:27px;box-shadow:0 8px 25px rgba(0,0,0,.25);z-index:999999;cursor:pointer}
.vtw-ai-v4-launcher svg{display:block}
.vtw-ai-v4-launcher.hide{display:none!important}
.vtw-ai-v4-box{position:fixed;right:22px;bottom:40px;width:390px;max-width:calc(100vw - 20px);height:590px;max-height:calc(100vh - 104px);background:#fff;border-radius:14px;box-shadow:0 10px 40px rgba(0,0,0,.28);z-index:999999;display:none;overflow:hidden;font-family:Arial,Helvetica,sans-serif}
.vtw-ai-v4-box.open{display:block}
.vtw-ai-v4-header{background:#D80000;color:#fff;padding:6px 10px;display:flex;align-items:center;gap:8px;min-height:48px;height:48px;position:relative}
.vtw-ai-v4-avatar{width:34px;height:34px;border-radius:50%;background:#fff;color:#D80000;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;overflow:hidden;flex:0 0 auto}
.vtw-ai-v4-avatar img{width:100%;height:100%;object-fit:cover}
.vtw-ai-v4-title{min-width:0;flex:1}
.vtw-ai-v4-title strong{display:block;font-size:15px;line-height:1.1;margin:0 0 1px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.vtw-ai-v4-title span{display:block;font-size:11.5px;line-height:1.15;opacity:.95;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.vtw-ai-v4-menu-wrap{position:relative;margin-left:auto;flex:0 0 auto}
.vtw-ai-v4-menu-btn,.vtw-ai-v4-close{width:36px!important;height:36px!important;min-width:36px!important;min-height:36px!important;border-radius:50%!important;border:0!important;background:transparent!important;color:#fff!important;display:flex!important;align-items:center!important;justify-content:center!important;font-size:22px!important;font-weight:700!important;line-height:1!important;padding:0!important;margin:0!important;cursor:pointer!important;box-shadow:none!important;text-align:center!important;aspect-ratio:1/1!important}
.vtw-ai-v4-menu-btn:hover,.vtw-ai-v4-close:hover{background:rgba(255,255,255,.15)!important;transform:scale(1.04)}
.vtw-ai-v4-top-menu{position:absolute;top:43px;right:0;width:170px;background:#fff;border:1px solid #e5e7eb;border-radius:12px;box-shadow:0 8px 24px rgba(0,0,0,.18);padding:7px;z-index:10}
.vtw-ai-v4-top-menu button{display:block;width:100%;border:0;background:#fff;color:#111827;text-align:left;border-radius:9px;padding:9px 10px;font-size:13px;font-weight:700;cursor:pointer;line-height:1.25;text-transform:none;box-shadow:none}
.vtw-ai-v4-top-menu button:hover{background:#fde8e8;color:#D80000}
.vtw-ai-v4-body{height:calc(100% - 48px);overflow-y:auto;overflow-x:hidden;padding:12px 18px;background:#fff;scroll-behavior:smooth}
.vtw-ai-v4-center{text-align:center;line-height:1.35;font-size:15px;margin:0 0 10px}
.vtw-ai-v4-form label{display:block;font-weight:700;margin:9px 0 5px;color:#111;font-size:15px;line-height:1.25}
.vtw-ai-v4-form label b{color:red}
.vtw-ai-v4-form input,.vtw-ai-v4-form select,.vtw-ai-v4-input input{width:100%;box-sizing:border-box;border:1px solid #ddd;border-radius:18px;padding:8px 13px;font-size:14px;line-height:1.3;outline:none;background:#fff;height:39px;min-height:39px;box-shadow:none}
.vtw-ai-v4-form input:focus,.vtw-ai-v4-form select:focus,.vtw-ai-v4-input input:focus{border-color:#D80000;box-shadow:0 0 0 2px rgba(216,0,0,.12)}
.vtw-ai-v4-form select{appearance:auto;-webkit-appearance:menulist}
#vtwAiV4cStart{width:100%;border:0;border-radius:22px;background:#D80000;color:#fff;font-size:15px;font-weight:700;padding:10px 14px;margin-top:14px;cursor:pointer;height:42px;line-height:1;box-shadow:none;text-transform:none}
#vtwAiV4cStart:hover{background:#b30000}
.vtw-ai-v4-chat{height:100%;min-height:100%;display:flex;flex-direction:column;gap:8px}
.vtw-ai-v4-messages{flex:1 1 auto;display:flex;flex-direction:column;gap:8px;margin:0;padding:0 0 4px;overflow-y:auto;min-height:0}
.vtw-ai-v4-msg{padding:10px 12px;border-radius:14px;line-height:1.45;white-space:pre-line;font-size:14px;word-break:break-word}
.vtw-ai-v4-msg.bot{background:#eef1f5;color:#222;margin-right:24px}
.vtw-ai-v4-msg.user{background:#D80000;color:#fff;margin-left:24px;align-self:flex-end}
.vtw-ai-v4-link-wrap{margin-top:8px;display:flex;flex-wrap:wrap;gap:6px}
.vtw-ai-v4-link-btn{display:inline-flex;align-items:center;justify-content:center;background:#D80000;color:#fff!important;text-decoration:none!important;border-radius:18px;padding:8px 13px;font-weight:700;font-size:13px;line-height:1.2;box-shadow:0 2px 8px rgba(11,99,182,.22)}
.vtw-ai-v4-link-btn:hover{background:#b30000;color:#fff!important}
.vtw-ai-v4-actions,.vtw-ai-v4-category-menu{display:none!important}
.vtw-ai-v4-input{flex:0 0 auto;display:flex;gap:8px;background:#fff;padding:8px 0 0;border-top:1px solid #f0f0f0;z-index:2}
.vtw-ai-v4-input input{border-radius:0;padding:8px 12px;height:38px;min-height:38px}
.vtw-ai-v4-input button{background:#D80000;color:#fff;border:0;border-radius:18px;padding:0 14px;font-weight:700;cursor:pointer;font-size:14px;box-shadow:none;min-width:58px;text-transform:none}
.vtw-ai-v4-box *{box-sizing:border-box}
.vtw-ai-v4-box input,.vtw-ai-v4-box select,.vtw-ai-v4-box button{font-family:Arial,Helvetica,sans-serif}
@media(max-width:520px){.vtw-ai-v4-launcher{right:16px;bottom:66px;width:56px;height:56px}.vtw-ai-v4-box{right:8px;left:8px;bottom:8px;width:auto;height:84vh;max-width:none;max-height:84vh;border-radius:14px}.vtw-ai-v4-header{min-height:48px;height:48px;padding:6px 10px}.vtw-ai-v4-avatar{width:34px;height:34px}.vtw-ai-v4-title strong{font-size:15px}.vtw-ai-v4-title span{font-size:11.5px}.vtw-ai-v4-menu-btn,.vtw-ai-v4-close{width:36px!important;height:36px!important;min-width:36px!important;min-height:36px!important;font-size:22px!important}.vtw-ai-v4-body{height:calc(100% - 48px);padding:10px 14px}.vtw-ai-v4-center{font-size:14px;margin-bottom:9px}.vtw-ai-v4-form label{margin:8px 0 4px;font-size:14px}.vtw-ai-v4-form input,.vtw-ai-v4-form select{height:38px;min-height:38px;padding:8px 12px;font-size:14px;border-radius:17px}#vtwAiV4cStart{height:40px;padding:9px 12px;margin-top:12px;font-size:14px}.vtw-ai-v4-msg{font-size:13.5px;padding:9px 11px}}

/* V9.1: menu chọn lại nhu cầu trong đầu ô chat */
.vtw-ai-v4-top-menu{width:230px!important;max-height:360px;overflow:auto}
.vtw-ai-v4-category-menu{display:block;background:#f8fafc;border:1px solid #e5e7eb;border-radius:10px;padding:6px;margin:5px 0 7px;max-height:190px;overflow:auto}
.vtw-ai-v4-category-menu[style*="display: none"]{display:none!important}
.vtw-ai-v4-category-menu button{font-weight:600!important;font-size:12.5px!important;padding:8px 9px!important;margin:2px 0!important;background:#fff!important;border:1px solid #edf0f4!important;color:#111827!important}
.vtw-ai-v4-category-menu button:hover{background:#eaf4ff!important;color:#d80000!important;border-color:#b9d9ff!important}
.vtw-ai-v4-menu-empty{font-size:12.5px;color:#6b7280;padding:8px;text-align:center}

/* V9.1.1: menu nhu cầu bám vào nút 3 gạch trước ô nhập */
.vtw-ai-v4-input{position:relative;align-items:center}
.vtw-ai-v4-input-menu-btn{width:42px!important;min-width:42px!important;height:38px!important;border:0!important;background:#fff!important;color:#111!important;border-radius:0!important;font-size:25px!important;line-height:1!important;padding:0!important;margin:0!important;box-shadow:none!important;display:flex!important;align-items:center!important;justify-content:center!important;cursor:pointer!important;text-transform:none!important}
.vtw-ai-v4-input-menu-btn:hover{background:#f3f7fb!important;color:#D80000!important}
.vtw-ai-v4-input-need-panel{position:absolute;left:0;right:0;bottom:52px;background:#fff;border:1px solid #dbe3ef;border-radius:14px;box-shadow:0 8px 28px rgba(0,0,0,.18);padding:8px;max-height:260px;overflow:auto;z-index:50}
.vtw-ai-v4-input-need-panel button{display:block;width:100%;border:1px solid #edf0f4!important;background:#fff!important;color:#111827!important;text-align:left;border-radius:9px;padding:8px 10px!important;font-size:13px!important;font-weight:600!important;line-height:1.25!important;margin:3px 0!important;box-shadow:none!important;text-transform:none!important;cursor:pointer!important}
.vtw-ai-v4-input-need-panel button:hover{background:#fde8e8!important;color:#D80000!important;border-color:#f3b8b8!important}
.vtw-ai-v4-need-parent{font-size:12px;font-weight:800;color:#D80000;margin:6px 2px 4px;padding-top:5px;border-top:1px solid #eef2f7}
.vtw-ai-v4-need-group:first-child .vtw-ai-v4-need-parent{border-top:0;padding-top:0;margin-top:0}
.vtw-ai-v4-category-menu .vtw-ai-v4-need-parent{font-size:12px;font-weight:800;color:#D80000;margin:6px 2px 4px}
/* Hiệu ứng lan tỏa quanh nút launcher */
.vtw-ai-v4-launcher{position:fixed}
.vtw-ai-v4-launcher-pulse{position:absolute;inset:0;border-radius:50%;background:#D80000;z-index:-1;animation:vtwLauncherPulse 2s infinite ease-out;pointer-events:none}
.vtw-ai-v4-launcher.hide .vtw-ai-v4-launcher-pulse{display:none}
@keyframes vtwLauncherPulse{0%{transform:scale(1);opacity:.55}100%{transform:scale(1.6);opacity:0}}

/* Bong bóng gợi ý chat */
.vtw-ai-v4-bubble{position:fixed;right:92px;bottom:52px;background:#D80000;color:#fff;padding:10px 16px;border-radius:20px;box-shadow:0 8px 22px rgba(0,0,0,.25);font-size:14px;font-weight:700;white-space:nowrap;z-index:999998;opacity:0;visibility:hidden;transform:translateX(12px) scale(.92);transition:opacity .35s ease,transform .35s cubic-bezier(.34,1.56,.64,1),visibility .35s;font-family:Arial,Helvetica,sans-serif;cursor:pointer}
.vtw-ai-v4-bubble:after{content:'';position:absolute;right:-6px;top:50%;transform:translateY(-50%) rotate(45deg);width:12px;height:12px;background:#D80000;box-shadow:2px -2px 3px rgba(0,0,0,.1)}
.vtw-ai-v4-bubble.show{opacity:1;visibility:visible;transform:translateX(0) scale(1);animation:vtwBubbleWiggle 2.6s ease-in-out .4s 1}
@keyframes vtwBubbleWiggle{0%,100%{transform:translateX(0) scale(1)}8%{transform:translateX(0) scale(1.04)}16%{transform:translateX(0) scale(1)}}

@media(max-width:520px){
    .vtw-ai-v4-bubble{right:80px;bottom:76px;font-size:13px;padding:9px 14px}
}
/*CSS cho nút mic*/
.vtw-ai-v4-mic-btn{width:42px!important;min-width:42px!important;height:38px!important;border:0!important;background:#fff!important;color:#111!important;border-radius:0!important;padding:0!important;margin:0!important;box-shadow:none!important;display:flex!important;align-items:center!important;justify-content:center!important;cursor:pointer!important}
.vtw-ai-v4-mic-btn svg{width:20px;height:20px;display:block;pointer-events:none}
.vtw-ai-v4-mic-btn:hover{background:#f3f7fb!important;color:#D80000!important}
.vtw-ai-v4-mic-btn.recording{color:#fff!important;background:#D80000!important;animation:vtwMicPulse 1.2s infinite}
@keyframes vtwMicPulse{0%,100%{opacity:1}50%{opacity:.6}}
.vtw-ai-v4-input button:disabled,
.vtw-ai-v4-mic-btn:disabled,
.vtw-ai-v4-input input:disabled{opacity:.5;cursor:not-allowed}