:root{--red-deep:#9B1D1D;--red-bright:#E31B23;--red-soft:#F9E6E6;--cream:#FDFAF7}.installation-hero{background:linear-gradient(145deg,var(--cream),var(--white));padding:60px 0 40px;position:relative;overflow:hidden}.installation-hero-content{max-width:1000px}.installation-hero-stats .stat-item{background:linear-gradient(145deg,var(--white),var(--cream));border:1px solid rgb(155 29 29 / .15)}.installation-hero-stats .stat-number{color:var(--red-bright);font-size:1.8rem}.quick-start{padding:60px 0;background:var(--white)}.steps-container{max-width:900px;margin:40px auto 0}.quick-step{display:flex;gap:25px;margin-bottom:30px;background:linear-gradient(145deg,var(--cream),var(--white));border-radius:30px;padding:30px;box-shadow:var(--shadow-sm);border:1px solid rgb(155 29 29 / .1);transition:var(--transition-smooth)}.quick-step:hover{transform:translateX(10px);box-shadow:var(--shadow-hover)}.step-number{width:60px;height:60px;background:linear-gradient(135deg,var(--red-deep),var(--red-bright));color:var(--white);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.8rem;font-weight:700;flex-shrink:0;box-shadow:0 5px 15px rgb(155 29 29 / .3)}.step-content h3{font-size:1.4rem;margin-bottom:10px;color:var(--charcoal)}.step-content p{color:var(--text-secondary);margin-bottom:15px}.step-note{background:var(--red-soft);padding:12px 20px;border-radius:20px;display:flex;align-items:center;gap:12px;margin-top:15px}.step-note i{color:var(--red-bright);font-size:1.2rem}.player-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:10px}.player-list li{display:flex;align-items:center;gap:8px;color:var(--text-primary)}.player-list i{color:var(--red-bright)}.device-tabs-section{padding:40px 0 20px;background:linear-gradient(145deg,var(--cream),var(--white))}.device-tabs{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:40px 0 20px}.device-tab{padding:12px 20px;background:var(--white);border:1px solid rgb(155 29 29 / .2);border-radius:50px;font-weight:600;color:var(--text-primary);cursor:pointer;transition:var(--transition-smooth);display:flex;align-items:center;gap:8px}.device-tab i{color:var(--red-bright);font-size:1.1rem}.device-tab:hover{background:var(--red-soft);border-color:var(--red-bright);transform:translateY(-2px)}.device-tab.active{background:linear-gradient(135deg,var(--red-deep),var(--red-bright));color:var(--white);border-color:#fff0}.device-tab.active i{color:var(--white)}.device-guides{padding:30px 0 60px;background:linear-gradient(145deg,var(--cream),var(--white))}.device-guide{display:none;background:var(--white);border-radius:40px;padding:40px;box-shadow:var(--shadow-premium);border:1px solid rgb(155 29 29 / .1)}.device-guide.active{display:block;animation:fadeIn 0.5s ease}@keyframes fadeIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.guide-header{text-align:center;margin-bottom:40px;padding-bottom:30px;border-bottom:2px solid var(--red-soft)}.guide-icon{width:100px;height:100px;background:linear-gradient(135deg,var(--red-soft),var(--white));border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:3rem;color:var(--red-deep);margin:0 auto 20px;border:2px solid var(--red-bright);box-shadow:var(--shadow-sm)}.guide-header h2{font-size:2rem;margin-bottom:10px;color:var(--charcoal)}.guide-header p{color:var(--text-secondary);font-size:1.1rem}.guide-content{max-width:800px;margin:0 auto}.guide-section{margin-bottom:40px;padding-bottom:30px;border-bottom:1px solid var(--red-soft)}.guide-section h3{font-size:1.4rem;margin-bottom:20px;color:var(--charcoal);display:flex;align-items:center;gap:10px}.guide-section h3 i{color:var(--red-bright)}.guide-section ul,.guide-section ol{padding-left:20px;margin-bottom:20px}.guide-section li{margin-bottom:10px;color:var(--text-secondary)}.guide-section li strong{color:var(--red-deep)}.guide-section ul li{list-style-type:none;display:flex;align-items:center;gap:10px}.guide-section ul li i{color:var(--red-bright)}.tip-box{background:var(--red-soft);border-left:4px solid var(--red-bright);padding:20px;border-radius:15px;margin:20px 0;display:flex;gap:15px;align-items:flex-start}.tip-box i{color:var(--red-bright);font-size:1.5rem;flex-shrink:0}.help-box{background:linear-gradient(135deg,var(--red-deep),var(--red-bright));color:var(--white);padding:25px;border-radius:25px;display:flex;gap:20px;align-items:center;margin-top:30px}.help-box i{font-size:2.5rem}.help-box h4{font-size:1.2rem;margin-bottom:5px}.help-box p{opacity:.9}.help-box a{color:var(--white);text-decoration:underline}.video-tutorials{padding:60px 0;background:var(--white)}.videos-grid{display:grid;grid-template-columns:1fr;gap:25px;margin-top:40px}.video-card{background:var(--white);border-radius:25px;overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid rgb(155 29 29 / .1);transition:var(--transition-smooth)}.video-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}.video-thumbnail{background:linear-gradient(135deg,var(--red-deep),var(--red-bright));color:var(--white);padding:40px;text-align:center;position:relative}.video-thumbnail i{font-size:4rem;margin-bottom:10px;filter:drop-shadow(0 5px 15px rgb(0 0 0 / .3))}.video-thumbnail span{display:block;font-size:1.1rem;font-weight:600}.video-info{padding:25px}.video-info h3{font-size:1.2rem;margin-bottom:10px;color:var(--charcoal)}.video-info p{color:var(--text-secondary);margin-bottom:15px;font-size:.95rem}.common-issues{padding:60px 0;background:linear-gradient(145deg,var(--cream),var(--white))}.issues-grid{display:grid;grid-template-columns:1fr;gap:25px;margin:40px 0}.issue-card{background:var(--white);border-radius:25px;padding:30px;box-shadow:var(--shadow-sm);border:1px solid rgb(155 29 29 / .1);transition:var(--transition-smooth)}.issue-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}.issue-icon{width:70px;height:70px;background:var(--red-soft);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2rem;color:var(--red-bright);margin-bottom:20px}.issue-card h3{font-size:1.3rem;margin-bottom:15px;color:var(--charcoal)}.issue-card ul li{margin-bottom:10px;display:flex;align-items:center;gap:10px;color:var(--text-secondary)}.issue-card ul li i{color:var(--red-bright)}.support-cta{text-align:center;background:linear-gradient(135deg,var(--red-deep),var(--red-bright));color:var(--white);padding:50px;border-radius:40px;margin-top:40px}.support-cta h3{font-size:1.8rem;margin-bottom:15px}.support-cta p{font-size:1.1rem;margin-bottom:25px;opacity:.95}.recommended-players{padding:60px 0;background:var(--white)}.players-grid{display:grid;grid-template-columns:1fr;gap:25px;margin-top:40px}.player-card{background:var(--white);border-radius:25px;padding:30px;box-shadow:var(--shadow-sm);border:1px solid rgb(155 29 29 / .1);transition:var(--transition-smooth);text-align:center}.player-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}.player-icon{width:80px;height:80px;background:linear-gradient(135deg,var(--red-soft),var(--white));border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2.5rem;color:var(--red-bright);margin:0 auto 20px;border:2px solid var(--red-bright)}.player-card h3{font-size:1.3rem;margin-bottom:5px;color:var(--charcoal)}.player-device{color:var(--red-bright);font-weight:600;margin-bottom:20px}.player-card ul{text-align:left;margin-bottom:25px}.player-card ul li{margin-bottom:8px;display:flex;align-items:center;gap:8px;color:var(--text-secondary)}.player-card ul li i{color:var(--red-bright)}.installation-faq{background:linear-gradient(145deg,var(--cream),var(--white))}.installation-cta{background:linear-gradient(135deg,var(--red-deep),var(--red-bright))}@media (min-width:640px){.videos-grid{grid-template-columns:repeat(2,1fr)}.issues-grid{grid-template-columns:repeat(2,1fr)}.players-grid{grid-template-columns:repeat(2,1fr)}.player-list{grid-template-columns:repeat(2,1fr)}}@media (min-width:992px){.videos-grid{grid-template-columns:repeat(4,1fr)}.issues-grid{grid-template-columns:repeat(4,1fr)}.players-grid{grid-template-columns:repeat(4,1fr)}.installation-hero-stats .stat-item{min-width:110px}}.mobile-nav{position:fixed;top:0;right:-100%;width:85%;max-width:400px;height:100vh;background:#fff;z-index:9999;transition:right 0.3s ease;box-shadow:-5px 0 30px rgb(0 0 0 / .1);overflow-y:auto}.mobile-nav.active{right:0}.mobile-nav-container{padding:30px 20px}.mobile-nav-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid rgb(155 29 29 / .1)}.mobile-logo{font-size:1.5rem;font-weight:700;color:var(--charcoal);text-decoration:none}.mobile-nav-close{background:none;border:none;font-size:2rem;cursor:pointer;color:var(--charcoal);padding:0 10px;line-height:1}.mobile-nav-links{display:flex;flex-direction:column;gap:15px;margin-bottom:30px}.mobile-nav-links a{display:flex;align-items:center;gap:10px;padding:12px 15px;color:var(--charcoal);text-decoration:none;font-weight:500;border-radius:12px;transition:all 0.3s ease;background:var(--cream)}.mobile-nav-links a i{width:24px;color:var(--red-bright)}.mobile-nav-links a.active,.mobile-nav-links a:hover{background:linear-gradient(135deg,var(--red-deep),var(--red-bright));color:#fff}.mobile-nav-links a.active i,.mobile-nav-links a:hover i{color:#fff}.mobile-nav-actions{display:flex;flex-direction:column;gap:10px;margin-bottom:30px}.mobile-nav-actions .btn{text-align:center;padding:15px}.mobile-nav-contact{margin-bottom:30px}.contact-item{display:flex;align-items:center;gap:10px;padding:10px 0;color:var(--text-secondary);text-decoration:none}.contact-item i{width:24px;color:var(--red-bright)}.mobile-nav-social{display:flex;gap:15px;justify-content:center}.mobile-nav-social a{width:40px;height:40px;background:var(--cream);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--red-deep);transition:all 0.3s ease}.mobile-nav-social a:hover{background:var(--red-bright);color:#fff}.mobile-menu-toggle{display:none;flex-direction:column;justify-content:space-between;width:30px;height:21px;background:#fff0;border:none;cursor:pointer;padding:0;z-index:100}.mobile-menu-toggle span{width:100%;height:3px;background:var(--charcoal);transition:all 0.3s ease;border-radius:3px}@media (max-width:768px){.nav-links{display:none}.header-actions{display:none}.mobile-menu-toggle{display:flex}.sticky-mobile-cta{display:block}}body.menu-open{overflow:hidden}