.demo-classes-section{position:relative;background:linear-gradient(180deg,#f8f9fa,#fff);padding:120px 0 140px;overflow:hidden}.demo-bg-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(230,57,70,.02) 1px,transparent 0),linear-gradient(90deg,rgba(230,57,70,.02) 1px,transparent 0);background-size:80px 80px;animation:grid-slide 60s linear infinite;pointer-events:none;z-index:1}@keyframes grid-slide{0%{transform:translate(0)}to{transform:translate(80px,80px)}}.demo-bg-gradient{position:absolute;inset:0;background:radial-gradient(circle at 30% 20%,rgba(230,57,70,.04) 0,transparent 50%),radial-gradient(circle at 70% 80%,rgba(230,57,70,.03) 0,transparent 50%);pointer-events:none;z-index:1}.demo-classes-header{text-align:center;max-width:900px;margin:0 auto 80px;position:relative;z-index:2}.demo-badge{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;background:linear-gradient(135deg,rgba(230,57,70,.08),rgba(230,57,70,.04));border:1.5px solid rgba(230,57,70,.2);border-radius:50px;margin-bottom:24px;transition:all .3s}.demo-badge:hover{background:linear-gradient(135deg,rgba(230,57,70,.12),rgba(230,57,70,.06));border-color:rgba(230,57,70,.3)}.demo-classes-title{font-size:48px;font-weight:800;line-height:1.2;color:#0f172a;margin:0 0 28px;letter-spacing:-.02em}.demo-highlight{background:linear-gradient(135deg,#e63946,#ff6b6b);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:inline}.demo-classes-description{font-size:18px;line-height:1.7;color:#64748b;margin:0;font-weight:500}.demo-classes-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px;position:relative;z-index:2}.demo-class-card{position:relative;cursor:pointer}.demo-card-inner{background:#fff;border:1px solid #e2e8f0;border-radius:24px;overflow:hidden;transition:all .4s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 20px rgba(0,0,0,.04),0 0 0 1px rgba(0,0,0,.02)}.demo-class-card:hover .demo-card-inner{border-color:rgba(230,57,70,.3);box-shadow:0 20px 48px rgba(0,0,0,.12),0 0 0 1px rgba(230,57,70,.1)}.demo-video-preview{position:relative;aspect-ratio:16/9;overflow:hidden;cursor:pointer;background:#000}.demo-thumbnail-image{width:100%;height:100%;-o-object-fit:cover;object-fit:cover;transition:transform .4s ease}.demo-class-card:hover .demo-thumbnail-image{transform:scale(1.05)}.demo-thumbnail-overlay{position:absolute;inset:0;transition:opacity .4s}.demo-class-card:hover .demo-thumbnail-overlay{opacity:.8}.demo-preview-gradient{position:absolute;inset:0;opacity:.15;transition:opacity .4s}.demo-class-card:hover .demo-preview-gradient{opacity:.25}.demo-preview-placeholder{position:absolute;inset:0;background:linear-gradient(135deg,#f1f5f9,#e2e8f0)}.demo-icon,.demo-preview-placeholder{display:flex;align-items:center;justify-content:center}.demo-icon{width:80px;height:80px;border-radius:20px;font-size:40px;box-shadow:0 8px 24px rgba(0,0,0,.1)}.demo-play-overlay{position:absolute;inset:0;background:rgba(0,0,0,.6);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);pointer-events:none}.demo-play-button,.demo-play-overlay{display:flex;align-items:center;justify-content:center}.demo-play-button{width:80px;height:80px;background:hsla(0,0%,100%,.95);border-radius:50%;color:#e63946;box-shadow:0 8px 32px rgba(0,0,0,.3);transform:scale(.9);transition:transform .3s}.demo-class-card:hover .demo-play-button{transform:scale(1)}.demo-play-button svg{margin-left:4px}.demo-level-badge{left:16px;padding:6px 14px;background:hsla(0,0%,100%,.95);border:2px solid;font-size:11px;color:#0f172a;text-transform:uppercase;letter-spacing:.5px}.demo-duration-badge,.demo-level-badge{position:absolute;top:16px;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-radius:12px;font-weight:700;z-index:2}.demo-duration-badge{right:16px;padding:8px 12px;background:rgba(0,0,0,.7);display:flex;align-items:center;gap:6px;color:#fff;font-size:12px}.demo-card-content{padding:28px}.demo-class-title{font-size:20px;font-weight:700;color:#0f172a;margin:0 0 20px;line-height:1.4;letter-spacing:-.01em;min-height:56px}.demo-instructor-info{display:flex;gap:12px;align-items:center;margin-bottom:20px;padding-bottom:20px;border-bottom:1px solid #e2e8f0}.instructor-avatar{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;color:#fff;flex-shrink:0;box-shadow:0 4px 12px rgba(0,0,0,.1)}.instructor-details{flex:1 1}.instructor-name{font-size:14px;font-weight:700;color:#0f172a;margin:0 0 2px}.instructor-role{font-size:12px;font-weight:600;color:#64748b;margin:0}.demo-topics{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}.demo-topic-tag{padding:6px 12px;background:#f1f5f9;border-radius:8px;font-size:11px;font-weight:600;color:#475569;transition:all .3s}.demo-class-card:hover .demo-topic-tag{background:rgba(230,57,70,.08);color:#e63946}.demo-card-footer{justify-content:space-between;gap:12px}.demo-card-footer,.demo-views{display:flex;align-items:center}.demo-views{gap:6px;font-size:13px;font-weight:600;color:#64748b}.demo-views svg{color:#94a3b8}.demo-watch-btn{display:flex;align-items:center;gap:6px;padding:10px 18px;background:transparent;border:1px solid #e2e8f0;border-radius:10px;color:#0f172a;font-size:13px;font-weight:700;cursor:pointer;transition:all .3s}.demo-watch-btn:hover{background:#e63946;border-color:#e63946;color:#fff;transform:translateY(-2px);box-shadow:0 4px 12px rgba(230,57,70,.3)}.demo-modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.95);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);display:flex;align-items:center;justify-content:center;z-index:9999;padding:24px}.demo-modal-content{position:relative;width:100%;max-width:1200px;background:#000;border-radius:24px;overflow:hidden;box-shadow:0 24px 80px rgba(0,0,0,.8)}.demo-modal-close{position:absolute;top:16px;right:16px;width:48px;height:48px;background:hsla(0,0%,100%,.1);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid hsla(0,0%,100%,.2);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;cursor:pointer;transition:all .3s;z-index:10}.demo-modal-close:hover{background:hsla(0,0%,100%,.2);transform:scale(1.1)}.demo-iframe-wrapper{position:relative;width:100%;padding-bottom:56.25%}.demo-iframe-wrapper iframe{position:absolute;top:0;left:0;width:100%;height:100%}@media (max-width:1024px){.demo-classes-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}}@media (max-width:768px){.demo-classes-section{padding:100px 0 120px}.demo-classes-title{font-size:36px}.demo-classes-description{font-size:16px}.demo-classes-grid{grid-template-columns:minmax(0,1fr);gap:24px}.demo-class-title{font-size:18px;min-height:auto}}@media (max-width:480px){.demo-classes-section{padding:80px 0 100px}.demo-classes-title{font-size:32px}.demo-classes-description{font-size:15px}.demo-card-content{padding:24px}.demo-class-title{font-size:17px}.demo-icon,.demo-play-button{width:64px;height:64px}.demo-icon{font-size:32px}}