.learn-landing{max-width:900px;min-height:100vh;color:var(--empire-text);margin:0 auto;padding:40px 20px}.learn-hero{text-align:center;margin-bottom:48px}.learn-hero h1{color:var(--empire-red);text-shadow:0 0 30px var(--empire-red-glow);margin-bottom:12px;font-size:42px}.learn-subtitle{color:var(--empire-text-muted);margin-bottom:8px;font-size:20px}.learn-hint{color:#666;font-size:14px}.learn-hint-code{background:var(--empire-card);color:var(--empire-red);border-radius:6px;padding:4px 10px;font-family:monospace}.learn-topics{flex-direction:column;gap:20px;margin-bottom:40px;display:flex}.learn-topic-card{background:var(--empire-card);border:2px solid var(--empire-card-border);cursor:pointer;border-radius:16px;padding:28px;transition:all .3s;position:relative;overflow:hidden}.learn-topic-card:hover{border-color:var(--topic-color,var(--empire-red));transform:translateY(-2px);box-shadow:0 8px 30px #0000004d}.learn-topic-card.selected{border-color:var(--topic-color,var(--empire-red));box-shadow:0 0 20px var(--topic-color,var(--empire-red-glow))}.learn-topic-card:before{content:"";background:var(--topic-color,var(--empire-red));opacity:0;width:4px;height:100%;transition:opacity .3s;position:absolute;top:0;left:0}.learn-topic-card.selected:before{opacity:1}.topic-icon{margin-bottom:12px;font-size:48px}.learn-topic-card h3{color:var(--empire-text);margin-bottom:8px;font-size:24px}.learn-topic-card p{color:var(--empire-text-muted);margin-bottom:16px;font-size:15px;line-height:1.6}.topic-levels{border-top:1px solid var(--empire-card-border);margin-top:20px;padding-top:20px;animation:.3s fadeIn}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.level-label{color:var(--empire-text-muted);text-transform:uppercase;letter-spacing:1px;margin-bottom:12px;font-size:13px}.level-buttons{flex-wrap:wrap;gap:10px;display:flex}.level-btn{border:1px solid var(--empire-card-border);color:var(--empire-text-muted);cursor:pointer;background:0 0;border-radius:8px;padding:8px 20px;font-size:14px;transition:all .2s}.level-btn:hover{border-color:var(--topic-color,var(--empire-red));color:var(--topic-color,var(--empire-red))}.level-btn.active{background:var(--topic-color,var(--empire-red));border-color:var(--topic-color,var(--empire-red));color:#fff}.learn-actions{justify-content:center;margin-bottom:32px;display:flex}.start-btn{background:var(--empire-red);color:#fff;cursor:pointer;border:none;border-radius:12px;padding:16px 48px;font-size:16px;font-weight:600;transition:all .3s}.start-btn:hover:not(:disabled){box-shadow:0 0 30px var(--empire-red-glow);background:#ff6b7a;transform:translateY(-2px)}.start-btn:disabled{color:#666;cursor:not-allowed;background:#3a3a5a}.learn-aim-shortcut{text-align:center;background:var(--empire-card);border:1px dashed var(--empire-card-border);border-radius:12px;padding:24px}.learn-aim-shortcut p{color:var(--empire-text-muted);margin-bottom:12px;font-size:14px}.aim-direct-btn{border:1px solid var(--empire-red);color:var(--empire-red);cursor:pointer;background:0 0;border-radius:8px;padding:10px 24px;font-size:14px;transition:all .2s}.aim-direct-btn:hover{background:var(--empire-red);color:#fff}@media (width<=600px){.learn-hero h1{font-size:32px}.learn-topic-card{padding:20px}.level-buttons{gap:8px}.level-btn{padding:6px 14px;font-size:13px}}.language-name-input{margin-bottom:12px}.language-name-input input{border:1px solid var(--empire-card-border,#2a2a3a);background:var(--empire-dark,#0a0a0f);width:100%;color:var(--empire-text,#e0e0e0);border-radius:6px;padding:8px 12px;font-size:14px}.resume-error{color:var(--empire-warning,#f59e0b);margin-top:8px;font-size:13px}.tutorial-overlay{z-index:1000;-webkit-overflow-scrolling:touch;background:#0a0a0ff2;justify-content:center;align-items:flex-start;padding:20px;display:flex;position:fixed;inset:0;overflow-y:auto}.tutorial-card{background:var(--empire-card);border:1px solid var(--empire-card-border);border-radius:16px;flex-direction:column;gap:20px;width:100%;max-width:700px;margin-top:20px;margin-bottom:20px;padding:32px;animation:.4s ease-out tutorialSlideIn;display:flex}@keyframes tutorialSlideIn{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.tutorial-header{flex-shrink:0;justify-content:space-between;align-items:center;display:flex}.tutorial-badge{background:var(--empire-red);color:#fff;text-transform:uppercase;letter-spacing:1px;border-radius:20px;padding:6px 14px;font-size:12px;font-weight:600}.tutorial-skip{border:1px solid var(--empire-card-border);color:var(--empire-text-muted);cursor:pointer;background:0 0;border-radius:8px;flex-shrink:0;padding:6px 14px;font-size:13px;transition:all .2s}.tutorial-skip:hover{border-color:var(--empire-red);color:var(--empire-red)}.tutorial-content{text-align:center;flex-shrink:0}.tutorial-piece-icon{margin-bottom:12px;font-size:48px;animation:2s ease-in-out infinite pieceFloat}@keyframes pieceFloat{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.tutorial-title{color:var(--empire-red);text-shadow:0 0 20px var(--empire-red-glow);margin-bottom:6px;font-size:24px}.tutorial-subtitle{color:var(--empire-text-muted);margin-bottom:12px;font-size:15px;font-weight:400}.tutorial-text{color:var(--empire-text);max-width:600px;margin:0 auto;font-size:14px;line-height:1.7}.tutorial-visual{flex-shrink:0;justify-content:center;padding:8px 0;display:flex}.mini-board{flex-direction:column;align-items:center;gap:4px;display:flex}.mini-board-files{gap:0;padding-left:24px;display:flex}.mini-file-label{text-align:center;width:36px;color:var(--empire-text-muted);text-transform:uppercase;font-size:11px}.mini-board-ranks{flex-direction:column;display:flex}.mini-rank{align-items:center;gap:0;display:flex}.mini-rank-label{text-align:center;width:24px;color:var(--empire-text-muted);font-size:11px}.mini-square{justify-content:center;align-items:center;width:36px;height:36px;font-size:20px;transition:all .3s;display:flex}.mini-square.light{background:#d4a373}.mini-square.dark{background:#5c4033}.mini-square.highlighted{box-shadow:0 0 15px var(--empire-red-glow);border:2px solid var(--empire-red);z-index:1}.mini-piece{filter:drop-shadow(0 2px 4px #00000080)}.tutorial-nav{border-top:1px solid var(--empire-card-border);flex-shrink:0;justify-content:space-between;align-items:center;padding-top:16px;display:flex}.tutorial-btn{cursor:pointer;border:none;border-radius:10px;padding:10px 20px;font-size:14px;font-weight:600;transition:all .2s}.tutorial-btn:disabled{opacity:.3;cursor:not-allowed}.tutorial-btn-prev{border:1px solid var(--empire-card-border);color:var(--empire-text-muted);background:0 0}.tutorial-btn-prev:hover:not(:disabled){border-color:var(--empire-text);color:var(--empire-text)}.tutorial-btn-next{background:var(--empire-red);color:#fff}.tutorial-btn-next:hover{box-shadow:0 0 20px var(--empire-red-glow);background:#ff6b7a}.tutorial-dots{gap:8px;display:flex}.tutorial-dot{background:var(--empire-card-border);border-radius:50%;width:8px;height:8px;transition:all .3s}.tutorial-dot.active{background:var(--empire-red);box-shadow:0 0 10px var(--empire-red-glow);transform:scale(1.3)}@media (width<=600px){.tutorial-overlay{padding:10px}.tutorial-card{gap:16px;margin-top:10px;margin-bottom:10px;padding:20px}.tutorial-title{font-size:20px}.tutorial-subtitle{font-size:14px}.tutorial-text{font-size:13px}.tutorial-piece-icon{font-size:36px}.mini-square{width:28px;height:28px;font-size:16px}.mini-file-label,.mini-rank-label{width:18px;font-size:9px}.mini-file-label{width:28px}.tutorial-btn{padding:8px 14px;font-size:13px}}.chess-loading{background:var(--empire-dark);min-height:100vh;color:var(--empire-text);flex-direction:column;justify-content:center;align-items:center;gap:16px;display:flex}.chess-loading-spinner{font-size:48px;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.chess-container{max-width:1200px;min-height:100vh;margin:0 auto;padding:20px}.chess-header{border-bottom:1px solid var(--empire-card-border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px;padding-bottom:16px;display:flex}.chess-title-group{align-items:center;gap:16px;display:flex}.chess-header h1{color:var(--empire-red);text-shadow:0 0 20px var(--empire-red-glow);margin:0;font-size:28px}.chess-eval-badge{background:var(--empire-card);border:1px solid var(--empire-card-border);border-radius:20px;padding:4px 12px;font-size:14px;font-weight:600}.chess-controls{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.chess-controls button,.chess-controls select{background:var(--empire-card);border:1px solid var(--empire-card-border);color:var(--empire-text);cursor:pointer;border-radius:8px;padding:8px 16px;font-size:14px;transition:all .2s}.chess-controls button:hover:not(:disabled){background:var(--empire-red);border-color:var(--empire-red);color:#fff}.chess-controls button:disabled{opacity:.4;cursor:not-allowed}.chess-controls select:hover{border-color:var(--empire-red)}.chess-layout{grid-template-columns:1fr 360px;align-items:start;gap:24px;display:grid}.chess-board-area{position:relative}.aim-thinking-overlay{z-index:10;background:#0a0a0fb3;border-radius:8px;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.aim-thinking-box{background:var(--empire-card);border:1px solid var(--empire-red);border-radius:12px;flex-direction:column;align-items:center;gap:12px;padding:20px 32px;animation:1.5s ease-in-out infinite thinkingPulse;display:flex}@keyframes thinkingPulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.8;transform:scale(.98)}}.aim-thinking-icon{font-size:32px}.aim-thinking-dots{gap:6px;display:flex}.aim-thinking-dots span{background:var(--empire-red);border-radius:50%;width:8px;height:8px;animation:1s ease-in-out infinite dotBounce}.aim-thinking-dots span:nth-child(2){animation-delay:.2s}.aim-thinking-dots span:nth-child(3){animation-delay:.4s}@keyframes dotBounce{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.chess-sidebar{flex-direction:column;gap:16px;display:flex}.aim-chat{background:var(--empire-card);border:1px solid var(--empire-card-border);border-radius:12px;align-items:flex-start;gap:12px;padding:16px;display:flex}.aim-avatar{flex-direction:column;flex-shrink:0;align-items:center;gap:4px;display:flex}.aim-avatar-icon{font-size:32px}.aim-avatar-label{color:var(--empire-red);text-transform:uppercase;letter-spacing:1px;font-size:10px;font-weight:600}.aim-bubble{color:#d0d0e0;background:#252540;border-radius:4px 12px 12px;flex:1;padding:12px 16px;font-size:14px;line-height:1.6}.aim-bubble p{margin:0}.move-history,.game-info,.chess-hints{background:var(--empire-card);border:1px solid var(--empire-card-border);border-radius:12px;padding:16px}.move-history h3,.game-info h3,.chess-hints h3{color:var(--empire-red);text-transform:uppercase;letter-spacing:1px;margin-bottom:12px;font-size:13px;font-weight:600}.moves-list{max-height:200px;overflow-y:auto}.empty-moves{color:#555;font-size:13px;font-style:italic}.moves-pairs{flex-direction:column;gap:4px;display:flex}.move-pair{border-radius:4px;gap:8px;padding:4px 8px;font-family:Courier New,monospace;font-size:13px;display:flex}.move-pair:nth-child(odd){background:#e945600d}.move-number{color:var(--empire-text-muted);flex-shrink:0;width:24px}.move-white,.move-black{width:60px;color:var(--empire-text)}.status-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.status-item{flex-direction:column;gap:4px;display:flex}.status-label{color:var(--empire-text-muted);text-transform:uppercase;letter-spacing:1px;font-size:11px}.status-value{color:var(--empire-text);font-size:14px;font-weight:600}.status-win{color:var(--empire-success)}.status-loss{color:#ef4444}.status-draw{color:var(--empire-warning)}.chess-hints ul{margin:0;padding:0;font-size:13px;list-style:none}.chess-hints li{color:var(--empire-text-muted);border-bottom:1px solid var(--empire-card-border);padding:8px 0;line-height:1.5}.chess-hints li:last-child{border-bottom:none}.chess-hints li:before{content:"→ ";color:var(--empire-red)}.review-tutorial-btn{border:1px solid var(--empire-card-border);width:100%;color:var(--empire-text-muted);cursor:pointer;background:0 0;border-radius:10px;padding:12px;font-size:14px;transition:all .2s}.review-tutorial-btn:hover{border-color:var(--empire-red);color:var(--empire-red)}@media (width<=900px){.chess-layout{grid-template-columns:1fr}.chess-header{text-align:center;flex-direction:column}.chess-title-group{flex-direction:column;gap:8px}.chess-controls{justify-content:center}}.lang-template{max-width:720px;color:var(--empire-text);margin:0 auto;padding:32px 20px}.lang-loading{flex-direction:column;justify-content:center;align-items:center;gap:16px;height:100vh;display:flex}.lang-spinner{font-size:48px}.lang-header h1{color:var(--empire-red);margin-bottom:8px}.lang-resume-msg{color:var(--empire-text-muted);margin-bottom:24px}.lang-symbol-grid{grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;margin:16px 0;display:grid}.lang-symbol-card{background:var(--empire-card);border:1px solid var(--empire-card-border);text-align:center;border-radius:10px;padding:16px}.lang-symbol{margin-bottom:8px;font-size:32px}.lang-sound{color:var(--empire-red);font-size:14px}.lang-example{color:var(--empire-text-muted);margin-top:6px;font-size:12px}.lang-practice{margin-top:16px}.lang-practice-word{background:var(--empire-card);border-radius:6px;margin:4px;padding:4px 10px;font-size:14px;display:inline-block}.lang-answer-box,.lang-chat-input{gap:8px;margin:16px 0;display:flex}.lang-answer-box input,.lang-chat-input input{border:1px solid var(--empire-card-border);background:var(--empire-dark);color:var(--empire-text);border-radius:8px;flex:1;padding:10px}.lang-feedback.incorrect{color:var(--empire-warning)}.lang-actions{margin:16px 0}.lang-chat-msg.you{text-align:right;color:var(--empire-text)}.lang-native-prompt{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:12px;max-width:480px;height:100vh;display:flex}.lang-native-prompt .lang-answer-box{width:100%;margin-top:16px}.lang-symbol-card{cursor:pointer;transition:border-color .2s}.lang-symbol-row,.lang-example-row{justify-content:center;align-items:center;gap:6px;display:flex}.lang-speak-btn{cursor:pointer;background:0 0;border:none;padding:2px;font-size:16px;line-height:1}.lang-speak-btn-small{font-size:12px}.lang-speak-btn-inline{margin-left:4px;font-size:11px}.lang-word-exercise{background:var(--empire-card);border:1px solid var(--empire-card-border);border-radius:10px;margin-top:20px;padding:16px}.lang-exercise-prompt{margin-bottom:10px;font-size:14px}.lang-page{height:100vh;display:flex;overflow:hidden}.lang-main{flex:1;overflow-y:auto}.lang-main .lang-template{height:auto}.lang-chat-panel{border-left:1px solid var(--empire-card-border,#2a2a3a);background:var(--empire-card,#1a1a2e);flex-direction:column;flex-shrink:0;width:340px;height:100vh;display:flex}.lang-chat-panel-header{border-bottom:1px solid var(--empire-card-border,#2a2a3a);color:var(--empire-red,#e94560);justify-content:space-between;align-items:center;padding:14px 16px;font-weight:600;display:flex}.lang-chat-close{color:var(--empire-text,#e0e0e0);cursor:pointer;background:0 0;border:none;font-size:16px;display:none}.lang-chat-log{flex:1;padding:12px 16px;overflow-y:auto}.lang-chat-msg.you{text-align:right}.lang-chat-msg.aim{text-align:left;color:var(--empire-red,#e94560)}.lang-chat-typing{opacity:.6;font-style:italic}.lang-chat-input{border-top:1px solid var(--empire-card-border,#2a2a3a);gap:8px;padding:12px 16px;display:flex}.lang-chat-input input{border:1px solid var(--empire-card-border,#2a2a3a);background:var(--empire-dark,#0a0a0f);color:var(--empire-text,#e0e0e0);border-radius:8px;flex:1;padding:10px}.lang-chat-bubble{background:var(--empire-red,#e94560);cursor:pointer;z-index:45;border:none;border-radius:50%;width:56px;height:56px;font-size:24px;display:none;position:fixed;bottom:20px;right:20px;box-shadow:0 4px 12px #0006}.lang-chat-backdrop{display:none}@media (width<=768px){.lang-page{height:auto;display:block;overflow:visible}.lang-main{overflow-y:visible}.lang-chat-panel{z-index:50;width:100%;max-width:400px;height:100vh;transition:transform .25s;position:fixed;top:0;bottom:0;right:0;transform:translate(100%)}.lang-chat-panel.open{transform:translate(0)}.lang-chat-close{display:block}.lang-chat-bubble{justify-content:center;align-items:center;display:flex}.lang-chat-backdrop{z-index:40;background:#00000080;display:block;position:fixed;inset:0}}.lang-actions button,.lang-answer-box button,.lang-native-prompt button,.lang-chat-input button,.lang-chat-bubble{background:var(--lang-primary,var(--empire-red,#e94560))}.lang-header h1{color:var(--lang-primary,var(--empire-red,#e94560))}.lang-symbol-card.active{border-color:var(--lang-primary,var(--empire-red,#e94560))}.lang-word-exercise strong{color:var(--lang-accent,var(--lang-primary,var(--empire-red,#e94560)))}.lang-feedback.correct{color:var(--lang-secondary-contrast,#22c55e)}.lang-actions button,.lang-answer-box button,.lang-native-prompt button,.lang-chat-input button,.lang-chat-bubble{background:var(--lang-primary,var(--empire-red,#e94560))}.lang-chat-panel{background:linear-gradient(#14141f 0%,#1a1a2e 100%)}.lang-chat-panel-header{border-bottom:1px solid var(--empire-card-border,#2a2a3a);background:#ffffff05;align-items:center;gap:10px;padding:16px 18px;display:flex}.lang-chat-panel-header:before{content:"✨";font-size:18px}.lang-chat-panel-header span{letter-spacing:.3px;color:var(--lang-primary,var(--empire-red,#e94560));font-size:15px}.lang-chat-log{flex-direction:column;gap:10px;padding:16px;display:flex}.lang-chat-msg{word-wrap:break-word;border-radius:16px;max-width:85%;margin:0;padding:10px 14px;font-size:14px;line-height:1.45}.lang-chat-msg.you{background:var(--lang-primary,var(--empire-red,#e94560));color:#fff;text-align:left;border-bottom-right-radius:4px;align-self:flex-end}.lang-chat-msg.aim{color:var(--empire-text,#e0e0e0);border:1px solid var(--empire-card-border,#2a2a3a);text-align:left;background:#ffffff0f;border-bottom-left-radius:4px;align-self:flex-start}.lang-chat-typing{background:0 0!important;border:none!important}.lang-chat-input{background:#ffffff05;gap:10px;padding:14px 16px}.lang-chat-input input{border-radius:20px;padding:10px 16px}.lang-chat-input button{color:#fff;cursor:pointer;border:none;border-radius:20px;padding:10px 18px;font-weight:600}.lang-chat-bubble{border:3px solid #ffffff26}.lang-quiz-level-buttons{gap:10px;display:flex}.lang-quiz-level-buttons button{border:1px solid var(--empire-card-border,#2a2a3a);color:var(--empire-text,#e0e0e0);cursor:pointer;background:#ffffff0d;border-radius:10px;flex:1;padding:12px;font-weight:600}.lang-quiz-level-buttons button:hover{border-color:var(--lang-primary,var(--empire-red,#e94560))}.lang-quiz-choices{flex-direction:column;gap:8px;margin-bottom:12px;display:flex}.lang-quiz-choice-row{align-items:center;gap:8px;display:flex}.lang-quiz-choice-btn{text-align:left;border:1px solid var(--empire-card-border,#2a2a3a);color:var(--empire-text,#e0e0e0);cursor:pointer;background:#ffffff0a;border-radius:10px;flex:1;padding:12px 16px;font-size:15px}.lang-quiz-choice-btn:hover:not(.disabled){border-color:var(--lang-primary,var(--empire-red,#e94560));background:#ffffff14}.lang-quiz-choice-btn.disabled{opacity:.6;cursor:default}.lang-quiz-next-mcq{background:var(--lang-primary,var(--empire-red,#e94560));color:#fff;cursor:pointer;border:none;border-radius:8px;margin-top:8px;padding:10px 20px}.lang-mic-btn{border:1px solid var(--empire-card-border,#2a2a3a);cursor:pointer;background:#ffffff14;border-radius:8px;padding:8px 10px;font-size:16px}.lang-mic-btn.listening{border-color:var(--lang-primary,var(--empire-red,#e94560));animation:1s infinite lang-mic-pulse}@keyframes lang-mic-pulse{0%,to{opacity:1}50%{opacity:.4}}.lang-sentence-row{align-items:center;gap:8px;margin:12px 0 4px;display:flex}.lang-sentence{font-size:22px;font-weight:600}.lang-sentence-translation{color:var(--empire-text-muted,#a0a0c0);margin-bottom:16px}.lang-chat-panel .lang-chat-log{flex:auto;min-height:0;max-height:none;margin-bottom:0}.lang-chat-panel .lang-chat-input{flex-shrink:0;margin-top:auto}:root{--empire-red:#e94560;--empire-red-glow:#e945604d;--empire-dark:#0a0a0f;--empire-card:#1a1a2e;--empire-card-border:#2a2a3a;--empire-text:#e0e0e0;--empire-text-muted:#a0a0c0;--empire-success:#22c55e;--empire-warning:#f59e0b}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--empire-dark);color:var(--empire-text);min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}a{color:var(--empire-red)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--empire-dark)}::-webkit-scrollbar-thumb{background:var(--empire-card-border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--empire-red)}