@import "https://fonts.googleapis.com/css2?family=Coiny&family=Nunito:wght@300;400;500;600;700;800&display=swap";:root{--pink:#ffe5ec;--pink-deep:#ff8fab;--yellow:#fff4d6;--yellow-deep:#f4c430;--green:#ddf4e7;--green-deep:#48bb78;--blue:#dceeff;--blue-deep:#4299e1;--purple:#f7f1ff;--purple-deep:#9f7aea;--bg:#faf9fb;--surface:#fff;--surface-hover:#f8f7fa;--text:#2d3748;--text-secondary:#718096;--text-muted:#a0aec0;--border:#edf2f7;--border-light:#f7fafc;--accent:#805ad5;--accent-light:#b794f4;--success:#38a169;--warning:#dd6b20;--danger:#e53e3e;--sidebar-w:260px;--topbar-h:64px;--radius:14px;--radius-sm:8px;--radius-lg:20px;--shadow-sm:0 2px 4px #00000005;--shadow:0 6px 18px #0000000a;--shadow-lg:0 10px 30px #0000000f;--shadow-glow:0 0 20px #805ad51f}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:Nunito,-apple-system,sans-serif;font-weight:500;line-height:1.6;overflow-x:hidden}.app-layout{min-height:100vh;display:flex}.sidebar{width:var(--sidebar-w);background:var(--surface);border-right:1px solid var(--border-light);z-index:100;flex-direction:column;transition:transform .3s cubic-bezier(.4,0,.2,1);display:flex;position:fixed;top:0;bottom:0;left:0}.sidebar-logo{border-bottom:1px solid var(--border-light);align-items:center;gap:12px;padding:20px 24px;display:flex}.logo-icon{background:linear-gradient(135deg, var(--pink-deep), var(--purple-deep));color:#fff;border-radius:12px;justify-content:center;align-items:center;width:42px;height:42px;font-family:Coiny,cursive;font-size:20px;display:flex}.logo-text{background:linear-gradient(135deg, var(--pink-deep), var(--accent));-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-family:Coiny,cursive;font-size:18px}.sidebar-nav{flex-direction:column;flex:1;gap:2px;padding:12px;display:flex;overflow-y:auto}.nav-item{border-radius:var(--radius-sm);cursor:pointer;color:var(--text-secondary);text-align:left;background:0 0;border:none;align-items:center;gap:12px;width:100%;padding:11px 16px;font-family:inherit;font-size:14px;font-weight:500;transition:all .2s;display:flex}.nav-item:hover{background:var(--surface-hover);color:var(--text)}.nav-item.active{color:var(--accent);background:linear-gradient(135deg,#6c5ce714,#a29bfe14);font-weight:600}.nav-item.active .nav-icon{color:var(--accent)}.nav-icon{flex-shrink:0;justify-content:center;align-items:center;width:20px;height:20px;font-size:18px;display:flex}.sidebar-footer{border-top:1px solid var(--border-light);padding:16px}.user-profile{border-radius:var(--radius-sm);align-items:center;gap:12px;padding:8px;display:flex}.user-avatar{background:linear-gradient(135deg, var(--green-deep), var(--blue-deep));color:#fff;border-radius:10px;justify-content:center;align-items:center;width:38px;height:38px;font-size:16px;font-weight:700;display:flex}.user-info{flex-direction:column;display:flex}.user-name{font-size:13px;font-weight:600}.user-level{color:var(--text-muted);font-size:11px}.main-content{margin-left:var(--sidebar-w);flex:1;min-height:100vh}.topbar{height:var(--topbar-h);background:var(--surface);border-bottom:1px solid var(--border-light);z-index:50;align-items:center;gap:16px;padding:0 28px;display:flex;position:sticky;top:0}.menu-toggle{cursor:pointer;color:var(--text-secondary);background:0 0;border:none;font-size:22px;display:none}.search-box{background:var(--bg);border-radius:10px;flex:1;align-items:center;gap:8px;max-width:480px;padding:0 14px;display:flex}.search-box input{color:var(--text);background:0 0;border:none;outline:none;flex:1;padding:10px 0;font-family:inherit;font-size:14px}.search-icon{color:var(--text-muted);flex-shrink:0;font-size:16px}.topbar-actions{align-items:center;gap:12px;margin-left:auto;display:flex}.notif-btn{cursor:pointer;background:0 0;border:none;padding:6px;font-size:20px;position:relative}.notif-badge{background:var(--danger);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:16px;height:16px;font-size:10px;font-weight:700;display:flex;position:absolute;top:0;right:0}.page-content{padding:28px;animation:.3s fadeIn}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.page-title{color:var(--text);margin-bottom:4px;font-family:Coiny,cursive;font-size:26px}.page-subtitle{color:var(--text-secondary);margin-bottom:24px;font-size:14px}.card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow-sm);border:1px solid var(--border-light);padding:24px;transition:box-shadow .2s,transform .2s}.card:hover{box-shadow:var(--shadow)}.card-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.card-title{font-size:16px;font-weight:700}.card-badge{border-radius:20px;padding:4px 12px;font-size:11px;font-weight:600}.grid-2{grid-template-columns:repeat(2,1fr);gap:20px;display:grid}.grid-3{grid-template-columns:repeat(3,1fr);gap:20px;display:grid}.grid-4{grid-template-columns:repeat(4,1fr);gap:20px;display:grid}.grid-auto{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;display:grid}.stat-card{border-radius:var(--radius);background:var(--surface);border:1px solid var(--border-light);align-items:center;gap:16px;padding:20px;transition:transform .2s;display:flex}.stat-card:hover{transform:translateY(-2px)}.stat-icon{border-radius:14px;justify-content:center;align-items:center;width:48px;height:48px;font-size:22px;display:flex}.stat-value{font-size:24px;font-weight:800;line-height:1}.stat-label{color:var(--text-secondary);margin-top:2px;font-size:13px}.progress-bar{background:var(--border-light);border-radius:4px;height:8px;overflow:hidden}.progress-fill{background:linear-gradient(90deg, var(--accent), var(--accent-light));border-radius:4px;height:100%;transition:width .6s cubic-bezier(.4,0,.2,1)}.btn{border-radius:var(--radius-sm);cursor:pointer;border:none;align-items:center;gap:8px;padding:10px 20px;font-family:inherit;font-size:14px;font-weight:600;transition:all .2s;display:inline-flex}.btn-primary{background:linear-gradient(135deg, var(--accent), var(--accent-light));color:#fff;box-shadow:0 4px 12px #6c5ce74d}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 20px #6c5ce766}.btn-secondary{background:var(--bg);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:var(--surface-hover)}.btn-sm{padding:6px 14px;font-size:12px}.btn-lg{padding:14px 28px;font-size:16px}.tag{border-radius:20px;align-items:center;gap:4px;padding:4px 12px;font-size:12px;font-weight:600;display:inline-flex}.tag-pink{background:var(--pink);color:var(--pink-deep)}.tag-green{background:var(--green);color:var(--green-deep)}.tag-blue{background:var(--blue);color:var(--blue-deep)}.tag-yellow{background:var(--yellow);color:var(--yellow-deep)}.tag-purple{background:var(--purple);color:var(--purple-deep)}.quest-item{border-radius:var(--radius-sm);background:var(--bg);align-items:center;gap:14px;padding:14px 16px;transition:background .2s;display:flex}.quest-item:hover{background:var(--surface-hover)}.quest-icon{font-size:24px}.quest-info{flex:1}.quest-title{font-size:14px;font-weight:600}.quest-progress-text{color:var(--text-muted);font-size:12px}.quest-xp{color:var(--accent);font-size:13px;font-weight:700}.continue-item{border-radius:var(--radius-sm);background:var(--bg);cursor:pointer;align-items:center;gap:14px;padding:16px;transition:all .2s;display:flex}.continue-item:hover{background:var(--surface-hover);transform:translate(4px)}.continue-icon{font-size:28px}.continue-info{flex:1}.continue-title{font-size:14px;font-weight:600}.continue-sub{color:var(--text-muted);font-size:12px}.flashcard-container{perspective:1000px;cursor:pointer;width:100%;max-width:480px;height:320px;margin:0 auto}.flashcard{width:100%;height:100%;transform-style:preserve-3d;transition:transform .6s cubic-bezier(.4,0,.2,1);position:relative}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{backface-visibility:hidden;border-radius:var(--radius-lg);box-shadow:var(--shadow);flex-direction:column;justify-content:center;align-items:center;padding:32px;display:flex;position:absolute;inset:0}.flashcard-front{color:#fff;background:linear-gradient(135deg,#6c5ce7,#a29bfe)}.flashcard-back{background:var(--surface);border:2px solid var(--border-light);transform:rotateY(180deg)}.flashcard-word{margin-bottom:12px;font-family:Coiny,cursive;font-size:48px}.flashcard-pronunciation{opacity:.8;margin-bottom:8px;font-size:18px}.flashcard-type{background:#fff3;border-radius:20px;padding:4px 14px;font-size:13px}.flashcard-meaning{color:var(--accent);margin-bottom:16px;font-size:28px;font-weight:700}.flashcard-example{text-align:center;color:var(--text-secondary);font-size:14px;line-height:1.8}.hangul-grid{grid-template-columns:repeat(auto-fill,minmax(80px,1fr));gap:10px;display:grid}.hangul-cell{aspect-ratio:1;background:var(--surface);border:2px solid var(--border-light);border-radius:var(--radius-sm);cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:4px;transition:all .2s;display:flex}.hangul-cell:hover{border-color:var(--accent);box-shadow:var(--shadow-glow);transform:scale(1.08)}.hangul-cell.active{border-color:var(--accent);background:var(--purple)}.hangul-char{font-size:32px;font-weight:700}.hangul-rom{color:var(--text-muted);font-size:11px}.grammar-card{background:var(--surface);border:1px solid var(--border-light);border-radius:var(--radius);cursor:pointer;padding:24px;transition:all .25s}.grammar-card:hover{border-color:var(--accent-light);box-shadow:var(--shadow-glow);transform:translateY(-3px)}.grammar-pattern{color:var(--accent);margin-bottom:6px;font-size:24px;font-weight:800}.grammar-name{margin-bottom:8px;font-size:15px;font-weight:600}.grammar-formula{color:var(--text-secondary);background:var(--bg);border-radius:var(--radius-sm);padding:8px 12px;font-size:13px}.exercise-box{background:var(--bg);border-radius:var(--radius);margin-top:16px;padding:24px}.exercise-question{margin-bottom:16px;font-size:18px;font-weight:600}.exercise-input{border:2px solid var(--border);border-radius:var(--radius-sm);outline:none;width:100%;padding:12px 16px;font-family:inherit;font-size:16px;transition:border-color .2s}.exercise-input:focus{border-color:var(--accent)}.exercise-input.correct{border-color:var(--success);background:#f0fff4}.exercise-input.wrong{border-color:var(--danger);background:#fff5f5}.exercise-hint{color:var(--text-muted);margin-top:8px;font-size:13px;font-style:italic}.ai-fab{background:linear-gradient(135deg, var(--accent), var(--pink-deep));cursor:pointer;z-index:200;color:#fff;border:none;border-radius:50%;justify-content:center;align-items:center;width:56px;height:56px;font-size:24px;transition:transform .2s;display:flex;position:fixed;bottom:24px;right:24px;box-shadow:0 4px 20px #6c5ce766}.ai-fab:hover{transform:scale(1.1)}.ai-widget{background:var(--surface);border-radius:var(--radius-lg);width:360px;height:480px;box-shadow:var(--shadow-lg);z-index:200;opacity:0;pointer-events:none;flex-direction:column;transition:all .3s cubic-bezier(.4,0,.2,1);display:flex;position:fixed;bottom:92px;right:24px;transform:scale(.9)}.ai-widget.open{opacity:1;pointer-events:all;transform:scale(1)}.ai-widget-header{border-bottom:1px solid var(--border-light);align-items:center;gap:10px;padding:16px 20px;font-weight:600;display:flex}.ai-avatar-small{background:linear-gradient(135deg, var(--accent), var(--pink-deep));border-radius:10px;justify-content:center;align-items:center;width:32px;height:32px;font-size:16px;display:flex}.ai-close{cursor:pointer;color:var(--text-muted);background:0 0;border:none;margin-left:auto;padding:4px;font-size:18px}.ai-chat-body{flex-direction:column;flex:1;gap:12px;padding:16px;display:flex;overflow-y:auto}.ai-msg{border-radius:14px;max-width:85%;padding:12px 16px;font-size:14px;line-height:1.5}.ai-msg.bot{background:var(--bg);border-bottom-left-radius:4px;align-self:flex-start}.ai-msg.user{background:var(--accent);color:#fff;border-bottom-right-radius:4px;align-self:flex-end}.ai-input-area{border-top:1px solid var(--border-light);gap:8px;padding:12px 16px;display:flex}.ai-input{border:1px solid var(--border);border-radius:10px;outline:none;flex:1;padding:10px 14px;font-family:inherit;font-size:14px}.ai-input:focus{border-color:var(--accent)}.ai-send{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:10px;width:40px;height:40px;font-size:18px;transition:background .2s}.ai-send:hover{background:var(--accent-light)}.tab-group{background:var(--bg);border-radius:10px;gap:4px;margin-bottom:20px;padding:4px;display:flex}.tab-btn{cursor:pointer;color:var(--text-secondary);background:0 0;border:none;border-radius:8px;padding:8px 18px;font-family:inherit;font-size:13px;font-weight:500;transition:all .2s}.tab-btn.active{background:var(--surface);color:var(--accent);box-shadow:var(--shadow-sm);font-weight:600}.badge-item{border-radius:var(--radius-sm);background:var(--bg);text-align:center;flex-direction:column;align-items:center;gap:6px;padding:16px;display:flex}.badge-icon{font-size:32px}.badge-name{font-size:12px;font-weight:600}@media (width<=1024px){.grid-4,.grid-3{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main-content{margin-left:0}.menu-toggle{display:block}.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.page-content{padding:16px}.ai-widget{width:calc(100vw - 32px);right:16px}}