.usa-assistant,.usa-assistant button,.usa-assistant input,.usa-assistant textarea,.usa-assistant select{font-family:"Vazirmatn",-apple-system,BlinkMacSystemFont,"Segoe UI",Tahoma,Arial,sans-serif}
.usa-assistant{direction:rtl;position:fixed;z-index:999999;right:22px;bottom:22px;line-height:1.7;--usa-primary:#0b74de;--usa-primary-dark:#1d4ed8}
.usa-launcher{width:64px;height:64px;border:0;border-radius:50%;background:linear-gradient(135deg,var(--usa-primary),var(--usa-primary-dark));color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 18px 40px rgba(15,35,95,.28);cursor:pointer;transition:transform .2s ease,box-shadow .2s ease;padding:0}
.usa-launcher:hover{transform:translateY(-2px);box-shadow:0 20px 44px rgba(15,35,95,.32)}
.usa-launcher-icon{font-size:24px;line-height:1}
.usa-launcher-label{display:none}
.usa-panel[hidden]{display:none!important}
.usa-panel{position:absolute;right:0;bottom:82px;width:min(380px,calc(100vw - 28px));height:min(570px,calc(100vh - 120px));background:#fff;border:1px solid #dbe4f0;border-radius:16px;box-shadow:0 22px 56px rgba(15,23,42,.20);overflow:hidden;display:flex;flex-direction:column}
.usa-header{padding:12px 18px 10px;background:linear-gradient(135deg,var(--usa-primary),var(--usa-primary-dark));color:#fff;display:flex;align-items:flex-start;justify-content:space-between;position:relative}
.usa-header:after{content:"";position:absolute;inset:auto -40px -40px auto;width:180px;height:180px;border-radius:50%;background:rgba(255,255,255,.08);filter:blur(1px)}
.usa-header-text{position:relative;z-index:1;text-align:right;padding-top:0}
.usa-header strong{display:block;font-size:20px;font-weight:800;line-height:1.25;margin:0}
.usa-header small{display:block;font-size:13px;opacity:.92}
.usa-assistant .usa-close{position:relative;z-index:1;width:30px!important;height:30px!important;min-width:30px!important;max-width:30px!important;min-height:30px!important;padding:0!important;margin:0!important;border:1px solid rgba(255,255,255,.20)!important;border-radius:7px!important;background:rgba(255,255,255,.10)!important;color:#fff!important;font-size:13px!important;line-height:1!important;display:flex!important;align-items:center!important;justify-content:center!important;cursor:pointer;flex:0 0 30px!important;box-shadow:none!important;transition:background .2s ease,border-color .2s ease}
.usa-assistant .usa-close:hover{background:rgba(255,255,255,.18)!important;border-color:rgba(255,255,255,.32)!important}
.usa-messages{flex:1;overflow:auto;background:linear-gradient(180deg,#f8fbff 0%,#ffffff 100%);padding:16px 14px 14px}
.usa-thread{display:flex;flex-direction:column;gap:14px}
.usa-row{display:flex;align-items:flex-end;gap:10px;max-width:100%}
.usa-row.user{justify-content:flex-end}
.usa-row.user .usa-bubble-wrap{align-items:flex-end}
.usa-row.user .usa-avatar{order:2;background:#3b82f6;position:relative;color:#fff}
.usa-row.assistant .usa-avatar{background:#eef4ff;color:#2f5fcc;border:1px solid #cfe0ff}
.usa-row.user .usa-avatar::before{content:"";position:absolute;top:7px;left:50%;transform:translateX(-50%);width:8px;height:8px;border-radius:50%;background:#fff}
.usa-row.user .usa-avatar::after{content:"";position:absolute;left:50%;bottom:6px;transform:translateX(-50%);width:15px;height:8px;border-radius:8px 8px 5px 5px;background:#fff}

.usa-avatar{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:#fff;box-shadow:none;flex:0 0 auto}
.usa-bubble-wrap{display:flex;flex-direction:column;gap:5px;max-width:calc(100% - 42px)}
.usa-time{font-size:12px;color:#8b96a8;padding:0 4px}
.usa-bubble{padding:11px 13px;border-radius:14px;font-size:14px;overflow-wrap:anywhere;box-shadow:none}
.usa-bubble.assistant{background:#fff;color:#1f2937;border:1px solid #dce5f2;border-top-right-radius:8px;white-space:pre-line}
.usa-bubble.assistant p{margin:0 0 10px}.usa-bubble.assistant p:last-child{margin-bottom:0}
.usa-bubble.assistant ul,.usa-bubble.assistant ol{margin:0;padding-inline-start:22px}
.usa-bubble.user{background:linear-gradient(135deg,var(--usa-primary),var(--usa-primary-dark));color:#fff;border-top-left-radius:8px}
.usa-bubble a{color:#2563eb;text-decoration:underline}
.usa-bubble.user a{color:#fff}
.usa-typing .usa-bubble{min-width:54px;text-align:center;letter-spacing:2px}
.usa-suggestions-section{margin-top:16px;border-top:1px solid #edf2f7;padding-top:12px}
.usa-suggestions-section h4{margin:0 0 9px;font-size:15px;color:#111827}
.usa-suggestions{display:flex;flex-wrap:wrap;gap:7px}
.usa-suggestion{border:1.5px solid #b8ccff;background:#fff;color:#2f5fcc;border-radius:999px;padding:7px 10px;font-size:12px;line-height:1.4;font-weight:600;cursor:pointer;transition:all .2s ease;box-shadow:0 1px 2px rgba(15,23,42,.03)}
.usa-suggestion:hover{transform:translateY(-1px);border-color:#8aabff;box-shadow:0 8px 18px rgba(53,94,230,.12)}
.usa-form{border-top:1px solid #e8eef6;background:#fff;padding:11px 13px;display:flex;align-items:center;gap:10px}
.usa-form input{flex:1;min-width:0;height:46px;border:1px solid #d7dfeb;border-radius:12px;padding:0 18px;font-size:15px;outline:none;background:#fff;color:#111827}
.usa-form input::placeholder{color:#9aa5b5}
.usa-form input:focus{border-color:#7aa2ff;box-shadow:0 0 0 4px rgba(59,130,246,.12)}
.usa-send{width:46px;height:46px;border:0;border-radius:12px;background:linear-gradient(135deg,var(--usa-primary),var(--usa-primary-dark));color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:none;font-size:20px;font-weight:700;flex:0 0 auto}
.usa-send span{display:inline-block;transform:rotate(180deg)}
@media(max-width:600px){
  .usa-assistant{right:12px;bottom:12px}
  .usa-launcher{width:58px;height:58px}
  .usa-panel{position:fixed;right:10px;left:10px;bottom:80px;width:auto;height:min(68vh,570px);border-radius:16px}
  .usa-header strong{font-size:20px}
  .usa-header small{font-size:12px}
  .usa-form{padding:12px}
  .usa-send,.usa-form input{height:46px}
}

/* v0.2.0: تصنيفات الأسئلة، أزرار الإجابة والتقييم */
.usa-categories{display:flex;gap:6px;overflow-x:auto;padding:0 0 8px;margin-bottom:2px;scrollbar-width:thin}
.usa-categories[hidden]{display:none!important}
.usa-category{flex:0 0 auto;border:1px solid #d7e2f7;background:#f8fbff;color:#64748b;border-radius:8px;padding:5px 9px;font-size:11px;font-weight:700;cursor:pointer;box-shadow:none}
.usa-category.active{background:#eef4ff;border-color:#9bb8ff;color:#2f5fcc}
.usa-answer-actions{display:flex;flex-wrap:wrap;gap:6px;margin-top:2px}
.usa-answer-action{display:inline-flex;align-items:center;justify-content:center;text-decoration:none!important;border:1px solid #adc4ff;border-radius:8px;background:#f7faff;color:#2f5fcc!important;padding:6px 10px;font-size:12px;font-weight:700;line-height:1.4}
.usa-answer-action:hover{background:#edf3ff;border-color:#86a7ff}
.usa-feedback{display:flex;align-items:center;gap:5px;margin-top:3px;color:#7a8699;font-size:11px}
.usa-feedback-btn{width:28px;height:28px;min-width:28px!important;min-height:28px!important;padding:0!important;border:1px solid #dbe4f0!important;border-radius:7px!important;background:#fff!important;box-shadow:none!important;cursor:pointer;font-size:13px!important;display:flex!important;align-items:center!important;justify-content:center!important}
.usa-feedback-btn:hover,.usa-feedback-btn.selected{background:#f2f6ff!important;border-color:#a9c0f7!important}
.usa-feedback-btn:disabled{cursor:default;opacity:.65}
.usa-hp{position:absolute!important;left:-10000px!important;top:auto!important;width:1px!important;height:1px!important;overflow:hidden!important;opacity:0!important;pointer-events:none!important}


/* v0.2.6: تجربة محادثة بملء الشاشة على الهاتف */
@media (max-width:768px){
  html.usa-mobile-chat-open,
  body.usa-mobile-chat-open{overflow:hidden!important;overscroll-behavior:none}

  .usa-assistant{right:12px;bottom:12px}
  .usa-assistant.usa-open .usa-launcher{display:none!important}

  .usa-panel{
    position:fixed!important;
    inset:0!important;
    width:100vw!important;
    max-width:none!important;
    height:100vh!important;
    height:100dvh!important;
    max-height:none!important;
    margin:0!important;
    border:0!important;
    border-radius:0!important;
    box-shadow:none!important;
    background:#fff;
    overflow:hidden;
    z-index:1000000;
  }

  .usa-header{
    flex:0 0 auto;
    min-height:56px;
    align-items:center;
    padding-top:calc(12px + env(safe-area-inset-top));
    padding-right:calc(18px + env(safe-area-inset-right));
    padding-bottom:10px;
    padding-left:calc(18px + env(safe-area-inset-left));
  }

  .usa-header strong{font-size:20px}

  .usa-assistant .usa-close{
    width:32px!important;
    height:32px!important;
    min-width:32px!important;
    max-width:32px!important;
    min-height:32px!important;
    flex-basis:32px!important;
    font-size:0!important;
    border-radius:8px!important;
  }
  .usa-assistant .usa-close::before{
    content:"→";
    font-family:Arial,sans-serif;
    font-size:20px;
    font-weight:700;
    line-height:1;
    color:#fff;
  }

  .usa-messages{
    min-height:0;
    flex:1 1 auto;
    padding:16px 14px 18px;
    overscroll-behavior:contain;
    -webkit-overflow-scrolling:touch;
  }

  .usa-form{
    flex:0 0 auto;
    padding-top:11px;
    padding-right:calc(13px + env(safe-area-inset-right));
    padding-bottom:calc(11px + env(safe-area-inset-bottom));
    padding-left:calc(13px + env(safe-area-inset-left));
    background:#fff;
  }

  .usa-form input{height:48px;font-size:16px}
  .usa-send{width:48px;height:48px}

  .usa-categories{scrollbar-width:none}
  .usa-categories::-webkit-scrollbar{display:none}
}