.not-found{min-height:100vh;color:#fff;padding:2rem 1rem;overflow-x:hidden}.not-found-content{max-width:1000px;margin:0 auto;text-align:center}.cassette-container{position:relative;margin:2rem auto 3rem;perspective:1000px}.cassette{display:inline-block;transform:rotateX(10deg) rotateY(-5deg);animation:float 6s ease-in-out infinite}.cassette-body{width:200px;height:120px;background:linear-gradient(145deg,#2c2c2c,#1a1a1a);border-radius:8px;position:relative;box-shadow:0 10px 30px #00000080,inset 0 2px 4px #ffffff1a;border:2px solid #333}.cassette-label{position:absolute;top:15px;left:15px;right:15px;height:40px;background:linear-gradient(45deg,#ff6b6b,#ee5a52);border-radius:4px;display:flex;flex-direction:column;justify-content:center;align-items:center;font-size:.75rem;font-weight:700;text-shadow:1px 1px 2px rgba(0,0,0,.5)}.label-text{font-size:.9rem;letter-spacing:1px}.label-subtext{font-size:.6rem;opacity:.8}.cassette-reels{position:absolute;bottom:15px;left:20px;right:20px;display:flex;justify-content:space-between;align-items:center}.reel{width:30px;height:30px;background:radial-gradient(circle,#444 30%,#222 31%,#444 40%,#222 41%);border-radius:50%;position:relative;border:2px solid #555}.reel.spinning{animation:spin 1s linear infinite}.reel-center{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:8px;height:8px;background:#666;border-radius:50%}.cassette-controls{position:absolute;bottom:15px;left:50%;transform:translate(-50%)}.play-button{background:#333;border:2px solid #555;border-radius:4px;color:#fff;cursor:pointer;font-size:.8rem;padding:4px 8px;transition:all .3s ease}.play-button:hover{background:#444;border-color:#666}.play-button.playing{background:#ff6b6b;border-color:#ee5a52}.cassette-shadow{position:absolute;bottom:-20px;left:50%;transform:translate(-50%);width:180px;height:20px;background:radial-gradient(ellipse,rgba(0,0,0,.3) 0%,transparent 70%);border-radius:50%}@keyframes float{0%,to{transform:rotateX(10deg) rotateY(-5deg) translateY(0)}50%{transform:rotateX(10deg) rotateY(-5deg) translateY(-10px)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.error-text{margin-bottom:2rem}.error-title{font-size:clamp(2.5rem,6vw,4rem);font-weight:700;margin-bottom:.5rem;text-shadow:2px 2px 4px rgba(0,0,0,.3);animation:glow 2s ease-in-out infinite alternate}.error-subtitle{font-size:clamp(1.25rem,3vw,2rem);margin-bottom:1rem;color:#ff6b6b;font-weight:600}.error-description{font-size:1.125rem;opacity:.9;max-width:600px;margin:0 auto;line-height:1.6}@keyframes glow{0%{text-shadow:2px 2px 4px rgba(0,0,0,.3),0 0 10px rgba(255,107,107,.3)}to{text-shadow:2px 2px 4px rgba(0,0,0,.3),0 0 20px rgba(255,107,107,.6)}}.joke-progress{display:flex;justify-content:center;gap:.5rem;margin-bottom:2rem}.progress-dot{width:10px;height:10px;border-radius:50%;background:#ffffff4d;transition:all .3s ease}.progress-dot.active{background:#ff6b6b;transform:scale(1.2)}.error-code{margin-bottom:3rem}.code-display{display:inline-flex;align-items:center;gap:1rem;background:#0000004d;padding:1rem 2rem;border-radius:12px;border:1px solid rgba(255,255,255,.1)}.code-number{font-size:3rem;font-weight:700;color:#ff6b6b;font-family:Courier New,monospace}.code-bars{display:flex;gap:4px;align-items:end}.bar{width:6px;background:#ff6b6b;border-radius:3px;animation:equalizer 1.5s ease-in-out infinite}.bar:nth-child(1){height:20px;animation-delay:0s}.bar:nth-child(2){height:30px;animation-delay:.2s}.bar:nth-child(3){height:15px;animation-delay:.4s}.bar:nth-child(4){height:25px;animation-delay:.6s}.bar:nth-child(5){height:18px;animation-delay:.8s}@keyframes equalizer{0%,to{transform:scaleY(1)}50%{transform:scaleY(.5)}}.navigation-section{margin-bottom:3rem}.navigation-section h3{font-size:1.5rem;margin-bottom:1.5rem;color:#ff6b6b}.navigation-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;max-width:800px;margin:0 auto}.nav-card{background:#ffffff1a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);border-radius:12px;padding:1.5rem 1rem;text-decoration:none;color:#fff;transition:all .3s ease;display:flex;flex-direction:column;align-items:center;gap:.5rem}.nav-card:hover{background:#fff3;transform:translateY(-4px);box-shadow:0 8px 25px #ff6b6b33}.nav-icon{font-size:2rem}.nav-text{font-weight:600;font-size:1rem}.tips-section{margin-bottom:3rem}.tips-section h4{font-size:1.25rem;margin-bottom:1rem;color:#ff6b6b}.tips-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.75rem;max-width:800px;margin:0 auto}.tip-item{background:#ffffff1a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);border-radius:8px;padding:1rem;display:flex;align-items:center;gap:.75rem;transition:all .3s ease}.tip-item:hover{background:#ffffff26;transform:translate(4px)}.tip-emoji{font-size:1.25rem}.tip-text{font-size:.95rem}.back-actions{display:flex;gap:1rem;justify-content:center;margin-bottom:2rem;flex-wrap:wrap}.back-button,.home-button{padding:12px 24px;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;text-decoration:none;display:inline-flex;align-items:center;gap:.5rem}.back-button{background:linear-gradient(45deg,#667eea,#764ba2);color:#fff}.back-button:hover{background:linear-gradient(45deg,#5a6fd8,#6a4190);transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}.home-button{background:linear-gradient(45deg,#ff6b6b,#ee5a52);color:#fff}.home-button:hover{background:linear-gradient(45deg,#ff5252,#e53935);transform:translateY(-2px);box-shadow:0 4px 12px #ff6b6b66}.easter-egg{background:#ffffff1a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);border-radius:12px;padding:1.5rem;max-width:600px;margin:0 auto;font-size:.95rem;line-height:1.6}@media(max-width:768px){.not-found{padding:1rem .5rem}.cassette-body{width:160px;height:100px}.navigation-grid{grid-template-columns:repeat(2,1fr)}.tips-list{grid-template-columns:1fr}.back-actions{flex-direction:column;align-items:center}.back-button,.home-button{width:100%;max-width:300px;justify-content:center}.code-number{font-size:2rem}}@media(max-width:480px){.cassette-body{width:140px;height:85px}.navigation-grid{grid-template-columns:1fr}.nav-card{padding:1rem}.easter-egg{padding:1rem;font-size:.875rem}}