.presentation-container{width:100vw;height:100vh;display:flex;align-items:center;justify-content:center;background-color:#000;position:relative;overflow:hidden}.slide-image{max-width:100%;max-height:100%;width:100%;height:100%;object-fit:contain;-webkit-user-select:none;user-select:none;-webkit-user-drag:none;transition:opacity .3s ease}.slide-image[loading=lazy]{opacity:0;animation:fadeIn .3s ease forwards}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeOut{0%{opacity:1}to{opacity:0}}.image-loader{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:5}.loader-spinner{width:50px;height:50px;border:4px solid rgba(255,255,255,.2);border-top-color:#fffc;border-radius:50%;animation:spin .8s linear infinite}.download-button,.help-button,.nav-button{background:linear-gradient(135deg,#0006,#0000004d);border:2px solid rgba(255,255,255,.3);color:#fff;width:48px;height:48px;border-radius:12px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s ease;padding:0;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:10;box-shadow:0 4px 12px #0000004d}.download-button svg,.help-button svg,.nav-button svg{width:24px;height:24px}.download-button:hover:not(:disabled),.help-button:hover:not(:disabled){background:linear-gradient(135deg,#00000080,#0006);border-color:#ffffff80;transform:scale(1.05);box-shadow:0 6px 16px #0006}.nav-button:hover:not(:disabled){background:linear-gradient(135deg,#00000080,#0006);border-color:#ffffff80;box-shadow:0 6px 16px #0006}.download-button:active:not(:disabled),.help-button:active:not(:disabled){transform:scale(.95)}.nav-button:active:not(:disabled){background:linear-gradient(135deg,#0009,#00000080);box-shadow:0 2px 8px #0000004d}.download-button:disabled,.help-button:disabled,.nav-button:disabled{opacity:.3;cursor:not-allowed}.download-button{position:absolute;top:20px;right:20px}.help-button{position:absolute;top:20px;right:80px}.nav-button{position:absolute;top:50%;transform:translateY(-50%)}.nav-button-left{left:20px}.nav-button-right{right:20px}.help-popup{position:absolute;top:0;left:0;right:0;bottom:0;background-color:#000000b3;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);display:flex;align-items:center;justify-content:center;z-index:100;animation:fadeIn .5s ease}.help-popup.fade-out{animation:fadeOut .5s ease forwards}.help-content{background-color:#ffffff1a;border:2px solid rgba(255,255,255,.3);border-radius:16px;padding:30px;max-width:500px;width:90%;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:#fff}.help-content h3{margin:0 0 20px;font-size:24px;font-weight:600;text-align:center}.help-section{display:flex;align-items:flex-start;gap:15px;margin-bottom:20px}.help-icon{font-size:32px;flex-shrink:0}.help-section strong{display:block;margin-bottom:5px;font-size:16px}.help-section p{margin:0;opacity:.9;font-size:14px;line-height:1.5}.help-close{width:100%;padding:12px;background-color:#fff3;border:2px solid rgba(255,255,255,.3);border-radius:8px;color:#fff;font-size:16px;font-weight:500;cursor:pointer;transition:all .3s ease;margin-top:10px}.help-close:hover{background-color:#ffffff4d;border-color:#ffffff80}@media (max-width: 768px){.download-button,.help-button{top:15px;width:44px;height:44px}.download-button{right:15px}.help-button{right:70px}.download-button svg,.help-button svg,.nav-button svg{width:22px;height:22px}.nav-button{width:44px;height:44px}.nav-button-left{left:15px}.nav-button-right{right:15px}.loader-spinner{width:40px;height:40px}.help-content{padding:20px}.help-content h3{font-size:20px}.help-icon{font-size:24px}.help-section strong{font-size:14px}.help-section p{font-size:13px}}.admin-login{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2)}.login-container{background:#fff;padding:3rem;border-radius:12px;box-shadow:0 20px 60px #0000004d;width:100%;max-width:400px}.login-container h1{margin:0 0 2rem;color:#333;text-align:center;font-size:2rem}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;color:#555;font-weight:500}.form-group input{width:100%;padding:.75rem;border:2px solid #e0e0e0;border-radius:6px;font-size:1rem;transition:border-color .3s}.form-group input:focus{outline:none;border-color:#667eea}.error-message{color:#e74c3c;background:#ffeaea;padding:.75rem;border-radius:6px;margin-bottom:1rem;text-align:center}.login-button{width:100%;padding:.75rem;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:6px;font-size:1rem;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s}.login-button:hover{transform:translateY(-2px);box-shadow:0 5px 20px #667eea66}.admin-panel{min-height:100vh;background:#f5f5f5}.admin-header{background:#fff;padding:1.5rem 2rem;box-shadow:0 2px 10px #0000001a;display:flex;justify-content:space-between;align-items:center}.admin-header h1{margin:0;color:#333;font-size:1.75rem}.logout-button{padding:.5rem 1.5rem;background:#e74c3c;color:#fff;border:none;border-radius:6px;cursor:pointer;font-weight:500;transition:background .3s}.logout-button:hover{background:#c0392b}.admin-tabs{background:#fff;padding:0 2rem;display:flex;gap:.5rem;border-bottom:2px solid #e0e0e0}.tab-button{padding:1rem 2rem;background:none;border:none;border-bottom:3px solid transparent;color:#666;font-size:1rem;font-weight:500;cursor:pointer;transition:all .3s;margin-bottom:-2px}.tab-button:hover{color:#667eea}.tab-button.active{color:#667eea;border-bottom-color:#667eea}.admin-content{padding:2rem;max-height:calc(100vh - 200px);overflow-y:auto;overflow-x:hidden}.admin-content::-webkit-scrollbar{width:8px}.admin-content::-webkit-scrollbar-track{background:#f1f1f1}.admin-content::-webkit-scrollbar-thumb{background:#888;border-radius:4px}.admin-content::-webkit-scrollbar-thumb:hover{background:#555}.loading-spinner{display:flex;align-items:center;justify-content:center;min-height:400px;color:#667eea;font-size:1.1rem;font-weight:500}.loading-spinner:after{content:"";width:40px;height:40px;margin-left:1rem;border:4px solid #e0e0e0;border-top-color:#667eea;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow:hidden}#root{width:100vw;height:100vh}