::view-transition-old(root),::view-transition-new(root){animation-duration:.3s}.transition-forward::view-transition-old(root){animation:.3s cubic-bezier(.4,0,.2,1) both slide-out-to-left}.transition-forward::view-transition-new(root){animation:.3s cubic-bezier(.4,0,.2,1) both slide-in-from-right}.transition-back::view-transition-old(root){animation:.3s cubic-bezier(.4,0,.2,1) both slide-out-to-right}.transition-back::view-transition-new(root){animation:.3s cubic-bezier(.4,0,.2,1) both slide-in-from-left}@keyframes slide-out-to-left{to{transform:translate(-20%);opacity:0}}@keyframes slide-in-from-right{0%{transform:translate(100%)}}@keyframes slide-out-to-right{to{transform:translate(100%);z-index:100}}@keyframes slide-in-from-left{0%{transform:translate(-20%);opacity:0}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-5);font-weight:var(--font-medium);border-radius:var(--radius-lg);transition:all var(--transition-fast);white-space:nowrap;transform:scale(1)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.btn:active:not(:disabled){transform:scale(.96)}.btn-primary{background:linear-gradient(135deg,var(--color-primary-500),var(--color-primary-600));color:#fff;box-shadow:var(--shadow-md)}.btn-primary:hover:not(:disabled){background:linear-gradient(135deg,var(--color-primary-600),var(--color-primary-700));box-shadow:var(--shadow-lg),var(--shadow-glow);transform:translateY(-1px)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary)}.btn-secondary:hover:not(:disabled){background:var(--border-color)}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover:not(:disabled){background:var(--bg-tertiary);color:var(--text-primary)}.btn-danger{background:linear-gradient(135deg,var(--color-danger-500),var(--color-danger-600));color:#fff}.btn-danger:hover:not(:disabled){background:linear-gradient(135deg,var(--color-danger-600),var(--color-danger-600))}.btn-success{background:linear-gradient(135deg,var(--color-success-500),var(--color-success-600));color:#fff}.btn-lg{padding:var(--space-4) var(--space-6);font-size:var(--text-lg)}.btn-sm{padding:var(--space-2) var(--space-3);font-size:var(--text-sm)}.btn-icon{width:40px;height:40px;padding:0;border-radius:var(--radius-full)}.btn-block{width:100%}.card{background:var(--bg-card);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-radius:var(--radius-xl);box-shadow:var(--shadow-sm);border:1px solid var(--border-color);overflow:hidden;transition:transform var(--transition-base),box-shadow var(--transition-base)}.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md),var(--shadow-glow);border-color:var(--color-primary-300)}.card-header{padding:var(--space-4);border-bottom:1px solid var(--border-color)}.card-body{padding:var(--space-4)}.card-footer{padding:var(--space-4);border-top:1px solid var(--border-color);background:#00000005}.flashcard{perspective:1000px;width:100%;min-height:300px}.flashcard-inner{position:relative;width:100%;height:100%;min-height:300px;transition:transform .6s;transform-style:preserve-3d}.flashcard.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{position:absolute;width:100%;min-height:300px;backface-visibility:hidden;background:var(--bg-card);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);border:1px solid var(--border-color);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-6)}.flashcard-back{transform:rotateY(180deg)}.flashcard-word{font-size:var(--text-4xl);font-weight:var(--font-bold);margin-bottom:var(--space-4);text-align:center}.flashcard-phonetic{font-size:var(--text-lg);color:var(--text-secondary);margin-bottom:var(--space-4)}.flashcard-definition{font-size:var(--text-lg);line-height:var(--leading-relaxed);text-align:center;color:var(--text-primary)}.flashcard-examples{margin-top:var(--space-4);font-size:var(--text-base);color:var(--text-secondary);font-style:italic}.input-group{display:flex;flex-direction:column;gap:var(--space-2)}.input-label{font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--text-secondary)}.input{width:100%;padding:var(--space-3) var(--space-4);background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);color:var(--text-primary);transition:all var(--transition-fast)}.input:focus{outline:none;border-color:var(--color-primary-500);box-shadow:0 0 0 3px var(--color-primary-100)}[data-theme=dark] .input:focus{box-shadow:0 0 0 3px #6366f133}.input::placeholder{color:var(--text-tertiary)}.textarea{min-height:120px;resize:vertical}.progress{width:100%;height:8px;background:var(--bg-tertiary);border-radius:var(--radius-full);overflow:hidden}.progress-bar{height:100%;background:linear-gradient(90deg,var(--color-primary-500),var(--color-primary-400));border-radius:var(--radius-full);transition:width var(--transition-slow)}.progress-lg{height:12px}.badge{display:inline-flex;align-items:center;padding:var(--space-1) var(--space-2);font-size:var(--text-xs);font-weight:var(--font-medium);border-radius:var(--radius-full);background:var(--bg-tertiary);color:var(--text-secondary)}.badge-primary{background:var(--color-primary-100);color:var(--color-primary-700)}.badge-success{background:var(--color-success-50);color:var(--color-success-600)}.badge-warning{background:var(--color-warning-50);color:var(--color-warning-600)}.badge-danger{background:var(--color-danger-50);color:var(--color-danger-600)}.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-4)}.stat-card{background:var(--bg-card);border-radius:var(--radius-xl);padding:var(--space-4);border:1px solid var(--border-color);text-align:center}.stat-value{font-size:var(--text-3xl);font-weight:var(--font-bold);color:var(--color-primary-500)}.stat-label{font-size:var(--text-sm);color:var(--text-secondary);margin-top:var(--space-1)}.rating-buttons{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-2);margin-top:var(--space-4)}.rating-btn{display:flex;flex-direction:column;align-items:center;gap:var(--space-1);padding:var(--space-3);border-radius:var(--radius-lg);font-weight:var(--font-medium);transition:all var(--transition-fast);border:2px solid transparent}.rating-btn:hover{transform:translateY(-2px)}.rating-btn.again{background:var(--color-danger-50);color:var(--color-danger-600);border-color:var(--color-danger-200)}.rating-btn.again:hover{background:var(--color-danger-100)}.rating-btn.hard{background:var(--color-warning-50);color:var(--color-warning-600);border-color:var(--color-warning-200)}.rating-btn.hard:hover{background:var(--color-warning-100)}.rating-btn.good{background:var(--color-success-50);color:var(--color-success-600);border-color:var(--color-success-200)}.rating-btn.good:hover{background:var(--color-success-100)}.rating-btn.easy{background:var(--color-primary-50);color:var(--color-primary-600);border-color:var(--color-primary-200)}.rating-btn.easy:hover{background:var(--color-primary-100)}.rating-interval{font-size:var(--text-xs);opacity:.7}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-12) var(--space-4);text-align:center}.empty-state-icon{font-size:4rem;margin-bottom:var(--space-4);opacity:.5}.empty-state-title{font-size:var(--text-xl);font-weight:var(--font-semibold);color:var(--text-primary);margin-bottom:var(--space-2)}.empty-state-description{color:var(--text-secondary);margin-bottom:var(--space-6)}.list{display:flex;flex-direction:column}.list-item{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-4);border-bottom:1px solid var(--border-color);transition:background var(--transition-fast)}.list-item:last-child{border-bottom:none}.list-item:hover{background:var(--bg-secondary)}.list-item-content{flex:1;min-width:0}.list-item-title{font-weight:var(--font-medium);margin-bottom:var(--space-1)}.list-item-subtitle{font-size:var(--text-sm);color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.tabs{display:flex;border-bottom:1px solid var(--border-color);overflow-x:auto}.tab{flex:1;padding:var(--space-3) var(--space-4);text-align:center;color:var(--text-secondary);font-weight:var(--font-medium);border-bottom:2px solid transparent;transition:all var(--transition-fast);white-space:nowrap}.tab:hover{color:var(--text-primary);background:var(--bg-secondary)}.tab.active{color:var(--color-primary-500);border-bottom-color:var(--color-primary-500)}.calendar-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:var(--space-1)}.calendar-day{aspect-ratio:1;border-radius:var(--radius-sm);background:var(--bg-tertiary);transition:all var(--transition-fast)}.calendar-day.level-1{background:var(--color-primary-200)}.calendar-day.level-2{background:var(--color-primary-400)}.calendar-day.level-3{background:var(--color-primary-500)}.calendar-day.level-4{background:var(--color-primary-700)}.loading{display:flex;align-items:center;justify-content:center;padding:var(--space-8)}.spinner{width:40px;height:40px;border:3px solid var(--border-color);border-top-color:var(--color-primary-500);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.speak-btn{width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:var(--color-primary-100);border-radius:var(--radius-full);color:var(--color-primary-600);font-size:var(--text-xl);transition:all var(--transition-fast)}.speak-btn:hover{background:var(--color-primary-200);transform:scale(1.05)}.speak-btn:active{transform:scale(.95)}.speak-btn.speaking{animation:pulse 1s infinite}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}.fab{position:fixed;bottom:calc(var(--nav-height) + var(--space-4));right:var(--space-4);width:56px;height:56px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--color-primary-500),var(--color-primary-600));color:#fff;border-radius:var(--radius-full);box-shadow:var(--shadow-lg),var(--shadow-glow);font-size:var(--text-2xl);transition:all var(--transition-fast);z-index:var(--z-dropdown)}.fab:hover{transform:scale(1.1);box-shadow:var(--shadow-xl),var(--shadow-glow)}.fab:active{transform:scale(.95)}:root{--color-primary-50: hsla(234, 100%, 97%, 1);--color-primary-100: hsla(234, 100%, 94%, 1);--color-primary-200: hsla(234, 100%, 89%, 1);--color-primary-300: hsla(234, 100%, 81%, 1);--color-primary-400: hsla(234, 90%, 72%, 1);--color-primary-500: hsla(234, 89%, 64%, 1);--color-primary-600: hsla(234, 78%, 56%, 1);--color-primary-700: hsla(234, 71%, 49%, 1);--color-primary-800: hsla(234, 70%, 41%, 1);--color-primary-900: hsla(234, 69%, 35%, 1);--color-accent-blue: #3b82f6;--color-accent-purple: #8b5cf6;--color-accent-pink: #ec4899;--color-success-50: hsla(158, 95%, 96%, 1);--color-success-500: #10b981;--color-success-600: #059669;--color-warning-50: hsla(45, 100%, 96%, 1);--color-warning-500: #f59e0b;--color-warning-600: #d97706;--color-danger-50: hsla(0, 100%, 97%, 1);--color-danger-500: #ef4444;--color-danger-600: #dc2626;--color-neutral-50: #fafafa;--color-neutral-100: #f4f4f5;--color-neutral-200: #e4e4e7;--color-neutral-300: #d4d4d8;--color-neutral-400: #a1a1aa;--color-neutral-500: #71717a;--color-neutral-600: #52525b;--color-neutral-700: #3f3f46;--color-neutral-800: #27272a;--color-neutral-900: #18181b;--bg-primary: #ffffff;--bg-secondary: #fdfdff;--bg-tertiary: var(--color-neutral-100);--bg-card: rgba(255, 255, 255, .65);--bg-glass: rgba(255, 255, 255, .45);--bg-glass-strong: rgba(255, 255, 255, .75);--bg-overlay: rgba(15, 23, 42, .4);--text-primary: #0f172a;--text-secondary: #475569;--text-tertiary: #94a3b8;--text-inverse: #ffffff;--border-color: rgba(255, 255, 255, .25);--border-color-strong: rgba(226, 232, 240, .8);--border-glass: 1px solid rgba(255, 255, 255, .35);--border-glow: 0 0 0 1px rgba(255, 255, 255, .2), 0 0 10px rgba(99, 102, 241, .1);--font-sans: "Outfit", "Inter", "Noto Sans TC", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: "Fira Code", "Consolas", monospace;--text-xs: .7rem;--text-sm: .85rem;--text-base: .95rem;--text-lg: 1.1rem;--text-xl: 1.35rem;--text-2xl: 1.75rem;--text-3xl: 2.25rem;--text-4xl: 3rem;--font-normal: 400;--font-medium: 500;--font-semibold: 600;--font-bold: 700;--leading-tight: 1.15;--leading-normal: 1.5;--leading-relaxed: 1.75;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-8: 2rem;--space-10: 2.5rem;--space-12: 3rem;--space-16: 4rem;--radius-sm: .4rem;--radius-md: .75rem;--radius-lg: 1rem;--radius-xl: 1.5rem;--radius-2xl: 2rem;--radius-full: 9999px;--shadow-sm: 0 2px 4px 0 rgba(0, 0, 0, .02);--shadow-md: 0 10px 25px -5px rgba(0, 0, 0, .05), 0 8px 10px -6px rgba(0, 0, 0, .03);--shadow-lg: 0 20px 50px -12px rgba(0, 0, 0, .1);--shadow-xl: 0 35px 60px -15px rgba(0, 0, 0, .2);--shadow-glow: 0 0 25px rgba(99, 102, 241, .2);--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .4s cubic-bezier(.4, 0, .2, 1);--transition-spring: .4s cubic-bezier(.34, 1.56, .64, 1);--z-dropdown: 100;--z-sticky: 200;--z-modal: 300;--z-toast: 400;--header-height: 70px;--nav-height: 80px;--safe-area-inset-bottom: env(safe-area-inset-bottom, 0px);--max-width: 500px}[data-theme=dark]{--bg-primary: #020617;--bg-secondary: #0f172a;--bg-tertiary: #1e293b;--bg-card: rgba(15, 23, 42, .7);--bg-glass: rgba(15, 23, 42, .6);--bg-glass-strong: rgba(15, 23, 42, .9);--bg-overlay: rgba(0, 0, 0, .8);--text-primary: #f8fafc;--text-secondary: #cbd5e1;--text-tertiary: #64748b;--border-color: rgba(255, 255, 255, .08);--border-color-strong: rgba(255, 255, 255, .15);--border-glass: 1px solid rgba(255, 255, 255, .06);--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .5);--shadow-md: 0 10px 25px -5px rgba(0, 0, 0, .6);--shadow-lg: 0 20px 50px -12px rgba(0, 0, 0, .8);--shadow-glow: 0 0 30px rgba(99, 102, 241, .4)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-tap-highlight-color:transparent;touch-action:manipulation}body{font-family:var(--font-sans);font-size:var(--text-base);line-height:var(--leading-normal);color:var(--text-primary);background-color:var(--bg-primary);background-image:radial-gradient(at 0% 0%,hsla(234,100%,85%,.3) 0px,transparent 50%),radial-gradient(at 100% 0%,hsla(280,100%,85%,.3) 0px,transparent 50%);background-attachment:fixed;min-height:100vh;margin:0;display:flex;justify-content:center;align-items:center}#app{width:100%;min-height:100vh;background:var(--bg-primary);position:relative;display:flex;flex-direction:column}[data-theme=dark] body{background-color:#0f172a;background-image:radial-gradient(at 0% 0%,hsla(240,100%,15%,.5) 0px,transparent 50%),radial-gradient(at 100% 100%,hsla(280,100%,15%,.5) 0px,transparent 50%)}.header{position:fixed;top:0;left:0;width:100%;height:var(--header-height);background:var(--bg-glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color);z-index:var(--z-sticky)}.bottom-nav{position:fixed;bottom:0;left:0;width:100%;height:calc(var(--nav-height) + var(--safe-area-inset-bottom));background:var(--bg-glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--border-color);display:flex;justify-content:space-around;align-items:center;z-index:var(--z-sticky);padding-bottom:var(--safe-area-inset-bottom)}.main{flex:1;width:100%;overflow-x:hidden;overflow-y:auto;padding-top:calc(var(--header-height) + var(--space-4));padding-bottom:calc(var(--nav-height) + var(--space-4))}@media(min-width:768px){body{background-color:var(--bg-secondary)}[data-theme=dark] body{background-color:#0a0f1a}#app{width:100%;max-width:100%;min-height:100vh;margin:0;display:block;position:relative}.header{position:fixed;top:0;left:0;right:0;width:100%;z-index:var(--z-sticky)}.header-content{max-width:1200px;margin:0 auto}.bottom-nav{position:fixed;left:0;top:var(--header-height);bottom:0;width:240px;height:auto;flex-direction:column;justify-content:flex-start;align-items:stretch;padding:var(--space-4);padding-top:var(--space-6);gap:var(--space-2);border-top:none;border-right:1px solid var(--border-color);background:var(--bg-glass-strong)}.nav-item{flex-direction:row;justify-content:flex-start;padding:var(--space-3) var(--space-4);border-radius:var(--radius-lg);gap:var(--space-3)}.nav-icon{font-size:var(--text-xl)}.nav-label{font-size:var(--text-base);display:block}.nav-item.active{background:var(--color-primary-50)}[data-theme=dark] .nav-item.active{background:#6366f126}.main{margin-left:240px;margin-top:0;width:auto;min-height:100vh;padding:calc(var(--header-height) + var(--space-6)) var(--space-8) var(--space-8);max-width:1200px}.main::-webkit-scrollbar{width:8px}.main::-webkit-scrollbar-track{background:transparent}.main::-webkit-scrollbar-thumb{background-color:var(--color-neutral-300);border-radius:20px}.toast-container{right:var(--space-6);left:auto;transform:none}}@media(min-width:1280px){#app{max-width:1400px;grid-template-columns:280px 1fr}.bottom-nav{width:280px}.main{margin-left:280px;width:calc(100% - 280px);padding:calc(var(--header-height) + var(--space-8)) var(--space-10) var(--space-10)}}.logo{display:flex;align-items:center;gap:var(--space-2)}.logo-icon{font-size:var(--text-2xl);animation:flame 1.5s ease-in-out infinite alternate}@keyframes flame{0%{transform:scale(1)}to{transform:scale(1.1)}}.logo-text{font-size:var(--text-xl);font-weight:var(--font-bold);background:linear-gradient(135deg,var(--color-primary-500),var(--color-primary-700));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.streak-badge{display:flex;align-items:center;gap:var(--space-1);padding:var(--space-2) var(--space-3);background:linear-gradient(135deg,var(--color-warning-500),var(--color-danger-500));border-radius:var(--radius-full);color:#fff;font-weight:var(--font-semibold)}.streak-icon{font-size:var(--text-sm)}.streak-count{font-size:var(--text-lg)}.streak-label{font-size:var(--text-sm)}.nav-item{display:flex;flex-direction:column;align-items:center;gap:var(--space-1);padding:var(--space-2) var(--space-3);color:var(--text-tertiary);transition:all var(--transition-fast);border-radius:var(--radius-lg)}.nav-item:hover{color:var(--text-secondary);background:var(--bg-tertiary)}.nav-item.active{color:var(--color-primary-500)}.nav-item.active .nav-icon{transform:scale(1.1)}.nav-icon{font-size:var(--text-xl);transition:transform var(--transition-spring)}.nav-label{font-size:var(--text-xs);font-weight:var(--font-medium)}.toast-container{position:fixed;top:calc(var(--header-height) + var(--space-4));left:50%;transform:translate(-50%);z-index:var(--z-toast);display:flex;flex-direction:column;gap:var(--space-2);pointer-events:none}.toast{padding:var(--space-3) var(--space-4);background:var(--bg-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);border-left:4px solid var(--color-primary-500);animation:slideIn var(--transition-spring);pointer-events:auto}.toast.success{border-left-color:var(--color-success-500)}.toast.error{border-left-color:var(--color-danger-500)}.toast.warning{border-left-color:var(--color-warning-500)}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.modal-container{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--bg-overlay);display:flex;align-items:center;justify-content:center;z-index:var(--z-modal);padding:var(--space-4)}.modal-container.hidden{display:none}.modal{background:var(--bg-card);border-radius:var(--radius-xl);box-shadow:var(--shadow-xl);max-width:90%;max-height:90%;overflow:auto;animation:modalIn var(--transition-spring)}@keyframes modalIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-4);border-bottom:1px solid var(--border-color)}.modal-title{font-size:var(--text-lg);font-weight:var(--font-semibold)}.modal-close{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-full);color:var(--text-secondary);transition:all var(--transition-fast)}.modal-close:hover{background:var(--bg-tertiary);color:var(--text-primary)}.modal-body{padding:var(--space-4)}.modal-footer{display:flex;gap:var(--space-3);justify-content:flex-end;padding:var(--space-4);border-top:1px solid var(--border-color)}.glass{background:var(--bg-glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-color)}.hidden{display:none!important}.text-center{text-align:center}.text-secondary{color:var(--text-secondary)}.font-semibold{font-weight:var(--font-semibold)}.mt-2{margin-top:var(--space-2)}.mt-4{margin-top:var(--space-4)}.mb-2{margin-bottom:var(--space-2)}.mb-4{margin-bottom:var(--space-4)}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-2{gap:var(--space-2)}.gap-4{gap:var(--space-4)}.w-full{width:100%}.mascot-img,.mascot-large{animation:mascot-float 3s ease-in-out infinite;filter:drop-shadow(0 4px 8px rgba(0,0,0,.1));border-radius:50%;background:radial-gradient(circle,#ffffffe6,#fff0 70%)}[data-theme=dark] .mascot-img,[data-theme=dark] .mascot-large{filter:drop-shadow(0 4px 12px rgba(255,150,50,.3));background:radial-gradient(circle,#282832e6,#28283200 70%)}@keyframes mascot-float{0%,to{transform:translateY(0) rotate(0)}25%{transform:translateY(-6px) rotate(-2deg)}75%{transform:translateY(-6px) rotate(2deg)}}.mascot-img.excited,.mascot-large.excited{animation:mascot-bounce .5s ease-in-out 3}@keyframes mascot-bounce{0%,to{transform:scale(1)}50%{transform:scale(1.15)}}.levelup-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000d9;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:var(--z-modal);animation:fadeIn .3s ease}.levelup-content{text-align:center;color:#fff;animation:levelup-pop .5s cubic-bezier(.34,1.56,.64,1)}.levelup-badge{font-size:80px;margin-bottom:var(--space-4);animation:glow-pulse 1.5s ease-in-out infinite}.levelup-title{font-size:var(--text-3xl);font-weight:var(--font-bold);background:linear-gradient(135deg,gold,#ff6b35);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:var(--space-2)}.levelup-level{font-size:var(--text-4xl);font-weight:var(--font-bold);color:gold;text-shadow:0 0 20px rgba(255,215,0,.5)}@keyframes levelup-pop{0%{transform:scale(0);opacity:0}to{transform:scale(1);opacity:1}}@keyframes glow-pulse{0%,to{filter:drop-shadow(0 0 10px rgba(255,215,0,.5))}50%{filter:drop-shadow(0 0 30px rgba(255,215,0,.9))}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}#confetti-canvas{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:calc(var(--z-modal) + 1)}button:active,.btn:active,.nav-item:active{transform:scale(.96);transition:transform .1s}