:root{--primary-color:#193c76;--secondary-color:#0077b6;--accent-color:#00b4d8;--success-color:#28a745;--danger-color:#dc3545;--warning-color:#ffc107;--dark-color:#212529;--light-color:#f8f9fa;--border-color:#dee2e6;--shadow:0 2px 8px rgba(0,0,0,0.1);--shadow-lg:0 4px 16px rgba(0,0,0,0.15)}.course-detail-page{min-height:100vh;background:linear-gradient(135deg,#f8f9fa 0%,#e9ecef 100%);padding-top:80px;padding-bottom:60px}.course-header{padding:20px 0;background:white;margin-bottom:30px}.breadcrumb{background:transparent;padding:0;margin:0}.breadcrumb-item a{color:var(--primary-color);text-decoration:none;transition:color 0.3s}.breadcrumb-item a:hover{color:var(--secondary-color)}.breadcrumb-item.active{color:#666}.course-main{background:white;border-radius:16px;padding:30px;box-shadow:var(--shadow);margin-bottom:30px}.course-image-wrapper{position:relative;width:100%;padding-top:56.25%;overflow:hidden;border-radius:12px;background:var(--light-color);margin-bottom:30px}.course-image{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover}.discount-badge-large{position:absolute;top:20px;right:20px;background:var(--danger-color);color:white;padding:12px 20px;border-radius:12px;font-size:20px;font-weight:700;z-index:2;box-shadow:0 4px 12px rgba(220,53,69,0.4)}.course-title-section{margin-bottom:30px}.course-category-badge{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:white;padding:6px 16px;border-radius:20px;font-size:14px;font-weight:600;margin-bottom:15px}.course-title{font-size:32px;font-weight:700;color:var(--dark-color);margin-bottom:20px;line-height:1.3}.course-meta{display:flex;flex-wrap:wrap;gap:24px}.meta-item{display:flex;align-items:center;gap:8px;color:#666;font-size:14px}.meta-item i{color:var(--primary-color);font-size:16px}.course-description-section{margin-bottom:40px;padding-top:30px;border-top:2px solid var(--border-color)}.section-title{font-size:24px;font-weight:700;color:var(--dark-color);margin-bottom:20px}.description-content{font-size:16px;line-height:1.8;color:#444}.course-modules-section{padding-top:30px;border-top:2px solid var(--border-color)}.modules-list{display:flex;flex-direction:column;gap:20px}.module-item{background:var(--light-color);border-radius:12px;overflow:hidden}.module-header{display:flex;justify-content:space-between;align-items:flex-start;padding:20px;background:white}.module-info{flex:1}.module-title{font-size:18px;font-weight:600;color:var(--dark-color);margin:0 0 8px 0;display:flex;align-items:center;gap:10px}.module-title i{color:var(--primary-color)}.module-description{font-size:14px;color:#666;margin:0}.module-meta{display:flex;align-items:center;gap:10px}.material-count{background:var(--primary-color);color:white;padding:6px 12px;border-radius:20px;font-size:13px;font-weight:600}.materials-list{padding:0 20px 20px}.material-item{display:flex;align-items:center;gap:12px;padding:12px;background:white;border-radius:8px;margin-bottom:8px;transition:all 0.3s ease}.material-item:hover{background:#f8f9fa;transform:translateX(4px)}.material-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:8px;background:var(--light-color)}.material-item.preview .material-icon{background:rgba(0,119,182,0.1);color:var(--secondary-color)}.material-item.locked .material-icon{background:rgba(0,0,0,0.05);color:#999}.material-info{flex:1;display:flex;justify-content:space-between;align-items:center}.material-title{font-size:14px;color:var(--dark-color);font-weight:500}.material-duration{font-size:13px;color:#666}.preview-badge{background:var(--success-color);color:white;padding:4px 10px;border-radius:12px;font-size:12px;font-weight:600;display:flex;align-items:center;gap:4px}.pricing-sidebar{top:100px}.pricing-card{background:white;border-radius:16px;padding:30px;box-shadow:var(--shadow-lg);border:2px solid var(--border-color)}.pricing-title{font-size:20px;font-weight:700;color:var(--dark-color);margin-bottom:20px;text-align:center}.pricing-options{display:flex;flex-direction:column;gap:12px;margin-bottom:24px}.pricing-option{border:2px solid var(--border-color);border-radius:12px;padding:16px;cursor:pointer;transition:all 0.3s ease;position:relative}.pricing-option:hover{border-color:var(--primary-color);transform:translateY(-2px);box-shadow:0 4px 12px rgba(25,60,118,0.15)}.pricing-option.selected{border-color:var(--primary-color);background:linear-gradient(135deg,rgba(25,60,118,0.05),rgba(0,119,182,0.05));box-shadow:0 4px 12px rgba(25,60,118,0.2)}.pricing-option input[type="radio"]{display:none}.pricing-option label{cursor:pointer;margin:0}.option-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.option-info{display:flex;align-items:center;gap:10px}.option-label{font-size:16px;font-weight:600;color:var(--dark-color)}.recommended-badge{background:linear-gradient(135deg,#f59e0b,#d97706);color:white;padding:4px 10px;border-radius:12px;font-size:11px;font-weight:700;display:flex;align-items:center;gap:4px}.option-check{width:24px;height:24px;border-radius:50%;border:2px solid var(--border-color);display:flex;align-items:center;justify-content:center;transition:all 0.3s ease}.pricing-option.selected .option-check{background:var(--primary-color);border-color:var(--primary-color)}.option-check i{color:white;font-size:14px;display:none}.pricing-option.selected .option-check i{display:block}.option-pricing{display:flex;align-items:center;gap:10px;margin-bottom:8px}.price-old{font-size:14px;color:#999;text-decoration:line-through}.price-new{font-size:24px;font-weight:700;color:var(--primary-color)}.discount-info{font-size:13px;color:var(--success-color);font-weight:600}.total-price-section{background:var(--light-color);padding:20px;border-radius:12px;margin-bottom:20px}.total-label{font-size:14px;color:#666;margin-bottom:8px}.total-price{font-size:32px;font-weight:700;color:var(--primary-color)}.action-buttons{display:flex;flex-direction:column;gap:12px}.btn-buy-now,.btn-add-cart{width:100%;padding:14px 20px;border:none;border-radius:10px;font-size:16px;font-weight:600;cursor:pointer;transition:all 0.3s ease;display:flex;align-items:center;justify-content:center;gap:10px}.btn-buy-now{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:white}.btn-buy-now:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(25,60,118,0.3)}.btn-add-cart{background:white;border:2px solid var(--primary-color);color:var(--primary-color)}.btn-add-cart:hover{background:var(--primary-color);color:white}.features-list{margin-top:30px;padding-top:20px;border-top:1px solid var(--border-color)}.features-list h4{font-size:16px;font-weight:600;color:var(--dark-color);margin-bottom:15px}.features-list ul{list-style:none;padding:0;margin:0}.features-list li{display:flex;align-items:center;gap:10px;padding:8px 0;font-size:14px;color:#666}.features-list li i{color:var(--success-color);font-size:16px}.guarantee-badge{display:flex;align-items:center;gap:12px;background:linear-gradient(135deg,rgba(40,167,69,0.1),rgba(32,201,151,0.1));padding:16px;border-radius:12px;margin-top:20px;border:1px solid rgba(40,167,69,0.2)}.guarantee-badge i{font-size:32px;color:var(--success-color)}.guarantee-badge strong{font-size:14px;color:var(--dark-color);display:block;margin-bottom:2px}.guarantee-badge p{font-size:12px;color:#666;margin:0}.no-pricing{text-align:center;padding:40px 20px}.btn-back{display:inline-block;margin-top:20px;padding:12px 24px;background:var(--primary-color);color:white;text-decoration:none;border-radius:8px;font-weight:600;transition:all 0.3s ease}.btn-back:hover{background:var(--secondary-color);transform:translateY(-2px)}@media (max-width:991px){.pricing-sidebar{position:static !important;margin-top:30px}.course-title{font-size:26px}}@media (max-width:768px){.course-detail-page{padding-top:70px}.course-main{padding:20px}.course-title{font-size:22px}.course-meta{gap:12px}.meta-item{font-size:13px}.pricing-card{padding:20px}.total-price{font-size:28px}}@media (max-width:576px){.course-title{font-size:20px}.discount-badge-large{padding:8px 14px;font-size:16px}.module-header{flex-direction:column;gap:12px}.option-header{flex-direction:column;align-items:flex-start;gap:8px}.price-new{font-size:20px}}.quantity-section{background:linear-gradient(135deg,#f8f9fa 0%,#e9ecef 100%);padding:20px;border-radius:12px;margin-bottom:20px;border:2px solid var(--border-color)}.quantity-label{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--dark-color);margin-bottom:12px}.quantity-label i{color:var(--primary-color)}.quantity-controls{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:12px}.qty-btn{width:40px;height:40px;border:2px solid var(--primary-color);background:white;border-radius:10px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all 0.3s ease;font-size:16px;color:var(--primary-color)}.qty-btn:hover:not(:disabled){background:var(--primary-color);color:white;transform:scale(1.05)}.qty-btn:disabled{opacity:0.5;cursor:not-allowed}.qty-display{display:flex;align-items:center;gap:8px;background:white;padding:10px 20px;border-radius:10px;border:2px solid var(--border-color);min-width:120px;justify-content:center}.qty-display input{display:none}.qty-display #quantityDisplay{font-size:24px;font-weight:700;color:var(--primary-color);min-width:30px;text-align:center}.qty-display .qty-unit{font-size:16px;color:#666;font-weight:500}.duration-info{display:flex;align-items:center;justify-content:center;gap:6px;font-size:13px;color:#666;padding:10px;background:white;border-radius:8px}.duration-info i{color:var(--primary-color)}.duration-info strong{color:var(--primary-color);font-weight:700}.total-savings{text-align:center;font-size:14px;color:var(--success-color);font-weight:600;margin-top:8px;padding:8px;background:rgba(40,167,69,0.1);border-radius:8px}.course-image{animation:fadeIn 0.5s ease-in}@keyframes fadeIn{from{opacity:0}to{opacity:1}}.course-image.loading{opacity:0.6;animation:pulse 1.5s ease-in-out infinite}@keyframes pulse{0%,100%{opacity:0.6}50%{opacity:0.3}}@media (max-width:768px){.quantity-section{padding:16px}.quantity-label{font-size:13px}.qty-btn{width:36px;height:36px;font-size:14px}.qty-display{padding:8px 16px;min-width:100px}.qty-display #quantityDisplay{font-size:20px}.duration-info{font-size:12px}}@media (max-width:576px){.quantity-controls{gap:8px}.qty-btn{width:32px;height:32px;font-size:12px}.qty-display{padding:6px 12px;min-width:80px}.qty-display #quantityDisplay{font-size:18px}}.btn-buy-now:disabled{opacity:0.7;cursor:not-allowed;transform:none !important}.btn-buy-now:disabled:hover{transform:none !important}.alert{animation:slideInRight 0.3s ease-out}@keyframes slideInRight{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}.alert.fade-out{animation:slideOutRight 0.3s ease-out}@keyframes slideOutRight{from{transform:translateX(0);opacity:1}to{transform:translateX(100%);opacity:0}}.preview-badge-btn{background:linear-gradient(135deg,var(--success-color),#20c997);color:white;padding:6px 14px;border-radius:20px;font-size:13px;font-weight:600;display:flex;align-items:center;gap:6px;border:none;cursor:pointer;transition:all 0.3s ease;white-space:nowrap}.preview-badge-btn:hover{transform:scale(1.05);box-shadow:0 4px 12px rgba(40,167,69,0.3)}.preview-badge-btn i{font-size:14px}.material-item.preview{background:rgba(40,167,69,0.02);border-left:3px solid var(--success-color)}.material-item.preview:hover{background:rgba(40,167,69,0.05)}.material-item.preview .material-icon{background:rgba(40,167,69,0.1);color:var(--success-color)}@media (max-width:768px){.preview-badge-btn{padding:5px 12px;font-size:12px}.preview-badge-btn i{font-size:13px}}@media (max-width:576px){.material-item{flex-wrap:wrap}.preview-badge-btn{margin-left:auto;margin-top:8px}}