:root{--primary-bg:#ffffff;--secondary-bg:#f8fafc;--content-bg:#ffffff;--text-primary:#1e293b;--text-secondary:#64748b;--text-accent:#3b82f6;--border-color:#e2e8f0;--shadow-light:0 4px 6px -1px rgba(0,0,0,0.1),0 2px 4px -1px rgba(0,0,0,0.06);--shadow-medium:0 10px 15px -3px rgba(0,0,0,0.1),0 4px 6px -2px rgba(0,0,0,0.05);--gradient-primary:linear-gradient(135deg,#667eea,#764ba2);--gradient-accent:linear-gradient(135deg,#f093fb,#f5576c);--border-radius:12px;--transition:all 0.3s cubic-bezier(0.4,0,0.2,1)}@media (prefers-color-scheme:dark){:root{--primary-bg:#0f172a;--secondary-bg:#1e293b;--content-bg:#334155;--text-primary:#f1f5f9;--text-secondary:#cbd5e1;--text-accent:#60a5fa;--border-color:#475569;--shadow-light:0 4px 6px -1px rgba(0,0,0,0.3),0 2px 4px -1px rgba(0,0,0,0.2);--shadow-medium:0 10px 15px -3px rgba(0,0,0,0.4),0 4px 6px -2px rgba(0,0,0,0.2)}}.presentation-page{min-height:100vh;background:var(--primary-bg);background-image:radial-gradient(circle at 25% 25%,rgba(59,130,246,.05) 0,transparent 50%),radial-gradient(circle at 75% 75%,rgba(139,92,246,.05) 0,transparent 50%);color:var(--text-primary);transition:var(--transition);position:relative;overflow-x:hidden}.presentation-page:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient-primary);z-index:10}.presentation-container{max-width:1200px;margin:0 auto;padding:2rem 1.5rem;position:relative}.presentation-content{background:var(--content-bg);border-radius:var(--border-radius);box-shadow:var(--shadow-medium);border:1px solid var(--border-color);overflow:hidden;backdrop-filter:blur(10px);transition:var(--transition)}.presentation-content:hover{transform:translateY(-2px);box-shadow:0 20px 25px -5px rgba(0,0,0,.1),0 10px 10px -5px rgba(0,0,0,.04)}.presentation-header{text-align:center;padding:3rem 2rem 2rem;background:var(--gradient-primary);color:white;position:relative;overflow:hidden}.presentation-header:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');opacity:.1}.presentation-title{font-size:3rem;font-weight:800;margin-bottom:1rem;background:linear-gradient(45deg,#ffffff,#e2e8f0);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-shadow:0 2px 4px rgba(0,0,0,.1);position:relative;z-index:1;letter-spacing:-.02em}.presentation-description{font-size:1.25rem;line-height:1.8;max-width:600px;margin:0 auto;opacity:.95;position:relative;z-index:1;font-weight:300}.slides-wrapper{padding:2rem;background:var(--secondary-bg);min-height:500px;display:flex;align-items:center;justify-content:center;position:relative}.slides-wrapper:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:repeating-linear-gradient(45deg,transparent,transparent 10px,rgba(59,130,246,.03) 0,rgba(59,130,246,.03) 20px);pointer-events:none}.navigation-wrapper{padding:2rem;background:var(--content-bg);border-top:1px solid var(--border-color);position:relative}.navigation-wrapper:before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:100px;height:1px;background:var(--gradient-accent)}@media (max-width:768px){.presentation-container{padding:1rem}.presentation-header{padding:2rem 1rem 1.5rem}.presentation-title{font-size:2.5rem}.presentation-description{font-size:1.125rem}.navigation-wrapper,.slides-wrapper{padding:1.5rem}}@media (max-width:480px){.presentation-title{font-size:2rem}.presentation-description{font-size:1rem}.navigation-wrapper,.slides-wrapper{padding:1rem}}@keyframes slideIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.presentation-content{animation:slideIn .6s ease-out}.presentation-content:focus-within{outline:2px solid var(--text-accent);outline-offset:2px}@media print{.presentation-page{background:white;color:black}.presentation-content{box-shadow:none;border:1px solid #ccc}.presentation-header{background:#f0f0f0;color:black}}