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.feedback-btn{border-color:var(--light-border)}.feedback-btn:hover{transform:scale(1.1);border-color:var(--primary-color)}.feedback-btn:disabled{cursor:not-allowed;opacity:.5;transform:none;border-color:#ccc!important}.share-question-btn{background-color:#f0f0f0;color:#333;border:1px solid #ccc;border-radius:20px;padding:5px 12px;cursor:pointer;font-size:.85em;font-weight:500;margin-left:auto;transition:all .2s ease}.share-question-btn:hover{background-color:#e0e0e0;border-color:#999}body.dark-mode .share-question-btn{background-color:var(--secondary-color);border-color:var(--secondary-hover-color);color:var(--text-color)}.swal2-container.swal2-backdrop-show{background:rgba(0,0,0,.4)!important;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}.swal2-popup{border-radius:20px!important;padding:2em!important;box-shadow:0 10px 30px rgba(0,0,0,.2),0 0 0 1px rgba(0,0,0,.05)!important}.swal2-popup.popup-correct{background:linear-gradient(145deg,#f0fff4,#d4edda)!important;border:1px solid #a3e6cb!important}.swal2-popup.popup-correct .swal2-title{color:#14532d!important}.swal2-popup.popup-correct .swal2-html-container{color:#166534!important;font-size:1.1em!important;line-height:1.7!important;width:100%;text-align:left;padding-left:1px}.swal2-popup.popup-correct .swal2-confirm{background:linear-gradient(to bottom,#28a745,#218838)!important;box-shadow:0 4px 0 0 #15803d!important}.swal2-popup.popup-incorrect{background:linear-gradient(145deg,#fff5f5,#f8d7da)!important;border:1px solid #f5c6cb!important}.swal2-popup.popup-incorrect .swal2-title{color:#7f1d1d!important}.swal2-popup.popup-incorrect .swal2-html-container{color:#991b1b!important;font-size:1.1em!important;line-height:1.7!important;width:100%;text-align:left;padding-left:1px}#learning-mobile-share-btn{background-color:#6c757d!important;color:#fff!important}#learning-mobile-share-btn svg{stroke:white!important}#learning-mobile-share-btn:hover{background-color:#5a6268!important}body.dark-mode #learning-mobile-share-btn{background-color:#4b5563!important}body.dark-mode #learning-mobile-share-btn:hover{background-color:#6b7280!important}.swal2-popup.popup-incorrect .swal2-confirm{background:linear-gradient(to bottom,#dc3545,#c82333)!important;box-shadow:0 4px 0 0 #b91c1c!important}.swal2-title{font-size:2em!important;font-weight:700!important;padding:.5em 0!important}.swal2-confirm{border:none!important;border-radius:12px!important;padding:.8em 2em!important;font-size:1.1em!important;font-weight:600!important;color:#fff!important;transform:translateY(0);transition:all .15s ease-out!important}.swal2-confirm:hover{filter:brightness(110%);transform:translateY(-2px)}.swal2-confirm:active{transform:translateY(1px);filter:brightness(100%);box-shadow:0 2px 0 0 rgba(0,0,0,.2)!important}.swal2-container.swal2-backdrop-show{background:rgba(0,0,0,.4)!important;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}.swal2-popup{display:flex!important;flex-direction:column!important;background:#fff!important;border-radius:20px!important;padding:1.5em 2em 2em 2em!important;box-shadow:0 10px 30px rgba(0,0,0,.1),0 0 0 1px rgba(0,0,0,.05)!important;border:1px solid rgba(0,0,0,.05)!important;width:90vw!important;max-width:100%}.swal2-title{font-size:clamp(1.5em, 5vw, 1.8em)!important;font-weight:700!important;padding:.5em 0!important;color:#333!important;line-height:1.3!important}.swal2-html-container{font-size:clamp(1em, 4vw, 1.1em)!important;line-height:1.7!important;color:#555!important;margin:0 0 1.5em 0!important;text-align:left!important}.swal2-html-container p{margin:0 0 10px 0!important}.swal2-html-container strong{color:#333}.swal2-actions{gap:1em!important}.swal2-styled{border-radius:12px!important;padding:.8em 2em!important;font-size:1em!important;font-weight:600!important;transform:translateY(0);transition:all .2s ease-out!important;box-shadow:0 2px 5px rgba(0,0,0,.1)!important;border:none!important}.swal2-styled:hover{transform:translateY(-2px);filter:brightness(105%)}.swal2-styled:active{transform:translateY(0);filter:brightness(100%);box-shadow:0 1px 2px rgba(0,0,0,.1)!important}.swal2-confirm{background:linear-gradient(to top,#007bff,#0d6efd)!important;color:#fff!important}.swal2-cancel{background:#e9ecef!important;color:#495057!important}.swal2-popup.popup-correct{background:linear-gradient(145deg,#f0fff4,#e6f7ec)!important}.swal2-popup.popup-correct .swal2-title{color:#14532d!important}.swal2-popup.popup-correct .swal2-html-container{color:#166534!important}.swal2-popup.popup-correct .swal2-confirm{background:linear-gradient(to top,#28a745,#218838)!important}.swal2-popup.popup-incorrect{background:linear-gradient(145deg,#fff5f5,#fdeded)!important}.swal2-popup.popup-incorrect .swal2-title{color:#7f1d1d!important}.swal2-popup.popup-incorrect .swal2-html-container{color:#991b1b!important}.swal2-popup.popup-incorrect .swal2-confirm{background:linear-gradient(to top,#dc3545,#c82333)!important}.swal2-icon{margin:1em auto .5em auto!important;border-width:.2em!important}body.dark-mode .swal2-popup{background:#2c2c32!important;color:#e5e7eb!important;border:1px solid rgba(255,255,255,.1)!important;box-shadow:0 10px 30px rgba(0,0,0,.2)!important}body.dark-mode .swal2-title{color:#fff!important}body.dark-mode .swal2-html-container{color:#c7c7d2!important}body.dark-mode .swal2-html-container strong{color:#fff}body.dark-mode .swal2-cancel{background:#4b5563!important;color:#e5e7eb!important}body.dark-mode .swal2-popup.popup-correct{background:linear-gradient(145deg,#052e16,#064e3b)!important}body.dark-mode .swal2-popup.popup-incorrect{background:linear-gradient(145deg,#450a0a,#7f1d1d)!important}body.dark-mode .swal2-popup.popup-correct .swal2-html-container,body.dark-mode .swal2-popup.popup-correct .swal2-title,body.dark-mode .swal2-popup.popup-incorrect .swal2-html-container,body.dark-mode .swal2-popup.popup-incorrect .swal2-title{color:#fff!important}.swal2-container.swal2-backdrop-show{background:rgba(0,0,0,.4)!important;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}.swal2-popup{display:flex!important;flex-direction:column!important;background:#fff!important;border-radius:20px!important;padding:1.5em 2em 2em 2em!important;box-shadow:0 10px 30px rgba(0,0,0,.1),0 0 0 1px rgba(0,0,0,.05)!important;border:1px solid rgba(0,0,0,.05)!important;width:90vw!important;max-width:500px!important}.swal2-title{font-size:clamp(1.5em, 5vw, 1.8em)!important;font-weight:700!important;padding:.5em 0!important;color:#333!important;line-height:1.3!important}.swal2-html-container{font-size:clamp(1em, 4vw, 1.1em)!important;line-height:1.7!important;color:#555!important;margin:0 0 1.5em 0!important;text-align:left!important}.swal2-html-container p{margin:0 0 10px 0!important}.swal2-html-container strong{color:#333}.swal2-actions{gap:1em!important}.swal2-styled{border-radius:12px!important;padding:.8em 2em!important;font-size:1em!important;font-weight:600!important;transform:translateY(0);transition:all .2s ease-out!important;box-shadow:0 2px 5px rgba(0,0,0,.1)!important;border:none!important}.swal2-styled:hover{transform:translateY(-2px);filter:brightness(105%)}.swal2-styled:active{transform:translateY(0);filter:brightness(100%);box-shadow:0 1px 2px rgba(0,0,0,.1)!important}.swal2-confirm{background:linear-gradient(to top,#007bff,#0d6efd)!important;color:#fff!important}.swal2-cancel{background:#e9ecef!important;color:#495057!important}.swal2-popup.popup-correct{background:linear-gradient(145deg,#f0fff4,#e6f7ec)!important}.swal2-popup.popup-correct .swal2-title{color:#14532d!important}.swal2-popup.popup-correct .swal2-html-container{color:#166534!important}.swal2-popup.popup-correct .swal2-confirm{background:linear-gradient(to top,#28a745,#218838)!important}.swal2-popup.popup-incorrect{background:linear-gradient(145deg,#fff5f5,#fdeded)!important}.swal2-popup.popup-incorrect .swal2-title{color:#7f1d1d!important}.swal2-popup.popup-incorrect .swal2-html-container{color:#991b1b!important}.swal2-popup.popup-incorrect .swal2-confirm{background:linear-gradient(to top,#dc3545,#c82333)!important}.swal2-icon{margin:1em auto .5em auto!important;border-width:.2em!important}body.dark-mode .swal2-popup{background:#2c2c32!important;color:#e5e7eb!important;border:1px solid rgba(255,255,255,.1)!important;box-shadow:0 10px 30px rgba(0,0,0,.2)!important}body.dark-mode .swal2-title{color:#fff!important}body.dark-mode .swal2-html-container{color:#c7c7d2!important}body.dark-mode .swal2-html-container strong{color:#fff}body.dark-mode .swal2-cancel{background:#4b5563!important;color:#e5e7eb!important}body.dark-mode .swal2-popup.popup-correct{background:linear-gradient(145deg,#052e16,#064e3b)!important}body.dark-mode .swal2-popup.popup-incorrect{background:linear-gradient(145deg,#450a0a,#7f1d1d)!important}body.dark-mode .swal2-popup.popup-correct .swal2-html-container,body.dark-mode .swal2-popup.popup-correct .swal2-title,body.dark-mode .swal2-popup.popup-incorrect .swal2-html-container,body.dark-mode .swal2-popup.popup-incorrect .swal2-title{color:#fff!important}.swal2-toast.swal2-popup{width:auto!important;max-width:380px!important;padding:1em 1.2em!important;box-shadow:0 5px 15px rgba(0,0,0,.15)!important;flex-direction:row!important;align-items:center!important;gap:1em!important}.swal2-toast .swal2-icon{width:2.5em!important;height:2.5em!important;margin:0!important;font-size:1.2rem!important}.swal2-toast .swal2-title{font-size:1.1em!important;padding:0!important;text-align:left;color:#333!important}.swal2-toast .swal2-html-container{font-size:1em!important;margin:0!important;padding:0!important;text-align:left;color:#555!important}.swal2-toast .swal2-html-container b{color:var(--primary-color)}.swal2-toast .swal2-actions,.swal2-toast .swal2-footer{display:none!important}.swal2-toast .swal2-timer-progress-bar{height:5px!important;border-radius:0 0 16px 16px;background-color:var(--primary-color)!important;opacity:.7}body.dark-mode .swal2-toast.swal2-popup{background:#374151!important;border-color:rgba(255,255,255,.1)!important}body.dark-mode .swal2-toast .swal2-title{color:#f9fafb!important}body.dark-mode .swal2-toast .swal2-html-container{color:#d1d5db!important}body.dark-mode .swal2-toast .swal2-html-container b{color:#60a5fa}.zalo-chat-bubble{position:fixed;bottom:25px;right:25px;width:60px;height:60px;background-color:#0068ff;border-radius:50%;box-shadow:0 4px 12px rgba(0,0,0,.2);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .2s ease;z-index:999}.zalo-chat-bubble:hover{transform:scale(1.1)}.zalo-chat-bubble img{width:32px;height:32px}#zalo-iframe-container{display:none;position:fixed;bottom:25px;right:25px;width:350px;height:420px;border:1px solid #e5e5e5;border-radius:8px;box-shadow:0 5px 20px rgba(0,0,0,.2);overflow:hidden;z-index:1000}#zalo-iframe{width:100%;height:100%;border:none}#zalo-close-btn{position:absolute;top:5px;right:5px;width:24px;height:24px;background-color:rgba(0,0,0,.3);color:#fff;border:none;border-radius:50%;cursor:pointer;font-weight:700;font-size:14px;line-height:24px;text-align:center;z-index:1001}body.zalo-chat-open .zalo-chat-bubble{display:none}#personal-goal-container{border-left:5px solid var(--primary-color);background-color:#f0f7ff;text-align:center}body.dark-mode #personal-goal-container{background-color:#1f2937;border-left-color:var(--primary-hover-color)}#countdown-timer{font-size:1.3em;font-weight:700;color:var(--danger-color);margin-bottom:15px;animation:pulse-red 2s infinite}#exam-date-input{padding:10px;border-radius:8px;border:1px solid var(--light-border);font-size:1em;margin:0 10px 10px 0;background-color:var(--white-color);color:var(--text-color)}#reset-goal-button,#set-goal-button{width:auto;min-width:150px;margin:0 auto}#reset-goal-button{background-color:var(--secondary-color)!important}#personal-goal-container{border-left:5px solid var(--primary-color);background-color:#f0f7ff;text-align:center}body.dark-mode #personal-goal-container{background-color:#1f2937;border-left-color:var(--primary-hover-color)}#countdown-timer{font-size:1.3em;font-weight:700;color:var(--danger-color);margin-bottom:15px;animation:pulse-red 2s infinite}#exam-date-input{padding:10px;border-radius:8px;border:1px solid var(--light-border);font-size:1em;margin:0 10px 10px 0;background-color:var(--white-color);color:var(--text-color)}#reset-goal-button,#set-goal-button{width:auto;min-width:150px;margin:0 auto}#reset-goal-button{background-color:var(--secondary-color)!important}.exam-set-button{display:inline-block;padding:10px 24px;font-size:1em;font-weight:600;color:#fff;border:none;border-radius:8px;text-align:center;cursor:pointer;transition:all .2s ease-in-out;text-decoration:none;box-shadow:0 2px 4px rgba(0,0,0,.1)}.exam-set-button:hover{transform:translateY(-2px);box-shadow:0 4px 8px rgba(0,0,0,.15)}.exam-set-button:disabled{cursor:not-allowed;opacity:.6;transform:none;box-shadow:none}#set-goal-button,.category-button-group>.exam-set-button{background-color:var(--primary-color)}#set-goal-button:hover,.category-button-group>.exam-set-button:hover{background-color:var(--primary-hover-color)}#reset-goal-button{background-color:var(--secondary-color)!important}#reset-goal-button:hover{background-color:var(--secondary-hover-color)!important}.swal2-popup.features-popup-custom{max-width:1200px!important}.swal2-popup.contact-popup{max-width:700px!important}.swal2-popup.guide-popup{max-width:650px!important}body.zalo-chat-hidden .zalo-chat-widget{display:none!important;visibility:hidden!important;opacity:0!important}@media (max-width:768px){#quiz-main-screen{position:relative;padding-top:60px}#quiz-main-screen .quiz-header-mobile{position:absolute;top:0;left:0;width:100%;z-index:100;background-color:var(--white-color);padding:8px 15px;box-sizing:border-box;border-bottom:1px solid var(--light-border);display:flex;align-items:center;gap:15px}#quiz-main-screen .quiz-header-mobile.sticky{position:fixed;box-shadow:0 2px 8px rgba(0,0,0,.1)}#quiz-main-screen .quiz-header-mobile .progress-container{flex-grow:1;margin-bottom:0}#quiz-main-screen .quiz-header-mobile .timer{position:static;margin-bottom:0;flex-shrink:0}}.swal2-popup.video-popup-fullscreen{width:90vw!important;max-width:90vw!important;padding:1em!important}.swal2-popup.video-popup-fullscreen .swal2-html-container{padding:0;margin:1em 0 0 0}.swal2-container.custom-toast-container{pointer-events:none}.swal2-popup.custom-toast-popup{padding:1em!important;border-radius:12px!important;width:auto!important;max-width:400px!important;box-shadow:0 5px 15px rgba(0,0,0,.15)!important;pointer-events:auto;display:flex!important;align-items:center!important}.swal2-popup.custom-toast-popup .swal2-header{padding:0 .5em!important}.swal2-popup.custom-toast-popup .swal2-title{font-size:1em!important}.swal2-popup.custom-toast-popup .swal2-actions{margin:0 0 0 1.5em!important}@media (max-width:768px){#quiz-main-screen .quiz-header-mobile{padding-top:12px;padding-bottom:12px}#quiz-main-screen .progress-container{height:26px}#quiz-main-screen .progress-text{font-size:1em}#quiz-main-screen .timer{font-size:1.4em}}
/* CSS CHO HỆ THỐNG ĐÁNH GIÁ SAO */
#star-rating-container {
    display: flex;
    justify-content: center;
    font-size: 2.5em; /* Kích thước sao */
    cursor: pointer;
    color: #ccc;
}
.star:hover,
.star.hovered {
    color: #f39c12; /* Màu vàng khi di chuột qua */
}
.star.rated {
    color: #f39c12; /* Màu vàng khi đã được chọn */
}
#rating-feedback-text {
    text-align: center;
    font-weight: bold;
    color: var(--success-color);
    display: none; /* Mặc định ẩn đi */
    margin-top: 15px;
}
/* Tự động ẩn phần đánh giá khi đang trong màn hình thi/học */
body.fullscreen-active #rating-section {
    display: none;
}