:root{--bg-color: #f4ecd8;--text-main: #3e2723;--gold-light: #fde047;--gold-main: #d4af37;--gold-dark: #b8860b;--brown-dark: #4e342e;--accent-red: #8b0000}*{box-sizing:border-box;margin:0;padding:0;font-family:Georgia,serif}body{background-color:var(--bg-color);color:var(--text-main);overflow:hidden}.app-container{height:100vh;display:flex;flex-direction:column;position:relative;background-image:radial-gradient(circle at center,transparent 0%,rgba(0,0,0,.05) 100%)}.top-bar{height:40px;display:flex;justify-content:space-between;align-items:center;padding:0 20px;background:#ffffff4d;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:10;border-bottom:1px solid rgba(212,175,55,.3)}.content-area{flex:1;overflow-y:auto;overflow-x:hidden;position:relative}.screen-center{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;padding:20px;text-align:center}.screen-padding{padding:20px;height:100%;overflow-y:auto}.padding-top{padding-top:40px}.title-magic{font-size:2.5rem;color:var(--gold-dark);text-shadow:2px 2px 4px rgba(0,0,0,.2);margin-bottom:10px;letter-spacing:2px}.subtitle{font-size:1.2rem;color:var(--brown-dark);font-style:italic}.section-title{font-size:1.8rem;color:var(--brown-dark);text-align:center;margin-bottom:20px;border-bottom:2px solid var(--gold-main);padding-bottom:10px;display:inline-block;width:100%}.era-title-large{font-size:3rem;color:#fff;text-shadow:0 2px 10px rgba(0,0,0,.8);margin-bottom:20px}.sync-text{font-size:.8rem;color:#666}.sync-text.success{color:#2e7d32}.sync-text.error{color:#c62828}.avatar-name{background:var(--gold-main);color:#fff;padding:2px 10px;border-radius:12px;font-size:.8rem;font-weight:700}.toast-container{position:absolute;top:60px;left:50%;transform:translate(-50%);z-index:100;pointer-events:none}.toast{background:#3e2723e6;color:#fff;padding:10px 20px;border-radius:20px;font-size:.9rem;box-shadow:0 4px 12px #0003;animation:fadeInOut 2s ease-in-out forwards}@keyframes fadeInOut{0%{opacity:0;transform:translateY(-10px)}10%{opacity:1;transform:translateY(0)}90%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(-10px)}}button{cursor:pointer;border:none;outline:none;font-family:inherit;transition:all .2s}.btn-primary{background:linear-gradient(135deg,var(--gold-main),var(--gold-dark));color:#fff;padding:12px 30px;border-radius:30px;font-size:1.1rem;font-weight:700;box-shadow:0 4px 15px #d4af3766;display:flex;align-items:center;gap:8px;justify-content:center}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #d4af3799}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{background:transparent;color:var(--brown-dark);border:2px solid var(--brown-dark);padding:10px 24px;border-radius:30px;font-size:1rem;font-weight:700;display:flex;align-items:center;gap:8px}.btn-secondary:hover{background:#4e342e1a}.btn-icon{background:none;color:var(--text-main);display:flex;align-items:center;font-size:1rem;opacity:.8}.btn-icon:hover{opacity:1}.time-machine-svg{width:200px;height:200px;filter:drop-shadow(0 10px 15px rgba(0,0,0,.2))}.era-bg-svg{width:100%;height:100%;object-fit:cover;transition:transform .3s}.char-svg{width:100%;height:100%}.trophy-svg{width:100%;height:100%;filter:drop-shadow(0 4px 6px rgba(0,0,0,.2))}.era-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;padding-bottom:80px}.era-card{height:200px;cursor:pointer;border-radius:12px;box-shadow:0 8px 16px #0000001a;overflow:hidden;position:relative}.era-card.locked{filter:grayscale(.8) opacity(.7);cursor:not-allowed}.era-card-inner{width:100%;height:100%;position:relative}.era-card:hover .era-bg-svg{transform:scale(1.1)}.era-card-overlay{position:absolute;bottom:0;left:0;width:100%;padding:30px 15px 15px;background:linear-gradient(to top,rgba(0,0,0,.8),transparent);color:#fff;display:flex;justify-content:space-between;align-items:flex-end}.lock-icon{color:var(--gold-light)}.detail-screen{position:relative;height:100%;display:flex;align-items:flex-end;justify-content:center;padding:20px 20px 100px}.detail-bg-wrapper{position:absolute;top:0;left:0;width:100%;height:100%;z-index:0}.glass-panel{background:#f4ecd8d9;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(212,175,55,.5);border-radius:16px;padding:24px;z-index:1;box-shadow:0 10px 30px #0000004d;width:100%;max-width:600px}.era-desc{font-size:1.1rem;line-height:1.6;color:var(--brown-dark)}.action-buttons{display:flex;gap:15px;justify-content:center}.scene-3d{width:300px;height:450px;perspective:1000px;margin:0 auto;cursor:pointer}.card-3d-inner{width:100%;height:100%;position:relative;transform-style:preserve-3d}.card-face{position:absolute;width:100%;height:100%;backface-visibility:hidden;border-radius:16px;box-shadow:0 15px 35px #0003;background:#fffaf0;padding:15px;display:flex;flex-direction:column}.card-back{transform:rotateY(180deg);background:#fdf5e6}.card-border-gold{border:2px solid var(--gold-main);border-radius:12px;height:100%;padding:20px;display:flex;flex-direction:column;align-items:center;position:relative}.card-border-gold:before{content:"";position:absolute;top:4px;left:4px;right:4px;bottom:4px;border:1px solid rgba(212,175,55,.5);border-radius:8px;pointer-events:none}.card-name{font-size:1.8rem;color:var(--brown-dark);margin-bottom:15px;font-weight:700}.card-img-container{width:180px;height:180px;border-radius:50%;overflow:hidden;border:4px solid var(--gold-main);margin-bottom:20px;background:#fff;display:flex;justify-content:center;align-items:center;padding:10px}.card-era-tag{background:var(--brown-dark);color:var(--gold-light);padding:4px 12px;border-radius:12px;font-size:.9rem}.click-hint{margin-top:auto;font-size:.8rem;color:#999;animation:pulse 2s infinite}.card-stats{width:100%;background:#d4af371a;padding:10px;border-radius:8px;margin-bottom:15px;text-align:left}.card-story{font-size:1rem;line-height:1.5;color:#555;text-align:left;flex:1}.btn-transform{background:var(--accent-red);color:#fff;border:none;padding:10px 20px;border-radius:20px;font-weight:700;display:flex;align-items:center;gap:5px;box-shadow:0 4px 10px #8b00004d}@keyframes pulse{0%{opacity:.5}50%{opacity:1}to{opacity:.5}}.challenge-layout{display:flex;flex-direction:column;gap:20px;padding-bottom:80px}@media (min-width: 768px){.challenge-layout{flex-direction:row}.challenge-main{flex:2}.history-sidebar{flex:1}}.score-board{display:flex;align-items:center;gap:20px;padding:15px 25px;margin-bottom:20px}.trophy-container{width:60px;height:60px}.score-label{font-size:.9rem;color:#666;text-transform:uppercase;letter-spacing:1px}.score-value{font-size:2.5rem;font-weight:700;color:var(--gold-dark);line-height:1}.parchment-bg{background-color:#fdfbf7;background-image:url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100' height='100' filter='url(%23noise)' opacity='0.05'/%3E%3C/svg%3E");border:1px solid #e0d4b8;border-radius:12px;padding:25px;box-shadow:inset 0 0 20px #8b45130d,0 4px 10px #0000000d}.q-title{color:var(--accent-red);margin-bottom:10px;font-size:1.2rem}.q-text{font-size:1.3rem;line-height:1.6;font-weight:700;color:var(--brown-dark);margin-bottom:20px}.answer-input{width:100%;height:120px;padding:15px;border:2px solid #e0d4b8;border-radius:8px;background:#ffffff80;font-size:1rem;resize:none;margin-bottom:15px;outline:none;transition:border-color .3s}.answer-input:focus{border-color:var(--gold-main);background:#fff}.btn-submit{background:var(--brown-dark);color:#fff;padding:12px 24px;border-radius:8px;font-weight:700;display:flex;align-items:center;gap:8px;margin-left:auto}.btn-submit:disabled{opacity:.7}.feedback-section{text-align:center;padding:20px;background:#d4af371a;border-radius:12px}.score-circle{width:80px;height:80px;border-radius:50%;background:var(--gold-main);color:#fff;display:flex;justify-content:center;align-items:center;font-size:2rem;font-weight:700;margin:0 auto 15px;box-shadow:0 4px 15px #d4af3766}.feedback-text{font-size:1.1rem;font-style:italic;color:var(--brown-dark)}.sidebar-title{display:flex;align-items:center;gap:8px;margin-bottom:15px;color:var(--brown-dark);border-bottom:1px solid rgba(0,0,0,.1);padding-bottom:10px}.history-list{display:flex;flex-direction:column;gap:12px;max-height:400px;overflow-y:auto}.history-item{padding:12px;background:#ffffff80;border-radius:8px;border-left:4px solid var(--gold-main)}.hist-header{display:flex;justify-content:space-between;margin-bottom:5px;font-size:.9rem}.hist-era{font-weight:700;color:var(--brown-dark)}.hist-score{color:var(--accent-red);font-weight:700}.hist-q{font-size:.85rem;color:#555;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.bottom-nav{position:fixed;bottom:0;left:0;width:100%;height:65px;background:#fff;box-shadow:0 -2px 10px #0000000d;display:flex;justify-content:space-around;align-items:center;z-index:50;padding-bottom:env(safe-area-inset-bottom)}.nav-item{display:flex;flex-direction:column;align-items:center;gap:4px;color:#999;background:none;flex:1;padding:10px 0}.nav-item.active{color:var(--gold-dark)}.nav-item span{font-size:.75rem;font-weight:700}