@import"https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;600;700&display=swap";:root{--bg-primary: #0d0d1a;--bg-secondary: #0a0a12;--bg-tertiary: #1a1a2e;--bg-dark: #0a0a12;--text-primary: #ffffff;--text-secondary: #b4b4cc;--text-muted: #7a7a9a;--border-color: rgba(99, 102, 241, .2);--accent-color: #6366f1;--accent-hover: #818cf8;--accent-light: rgba(99, 102, 241, .15);--accent-glow: rgba(99, 102, 241, .4);--success-color: #10b981;--error-color: #ef4444;--warning-color: #f59e0b;--neon-purple: #a855f7;--neon-blue: #3b82f6;--neon-green: #10b981;--header-bg: linear-gradient(135deg, #0f0f1a, #1a1a2e);--hero-bg: linear-gradient(135deg, #0d0d1a 0%, #1a1a2e 50%, #16213e 100%);--card-shadow: 0 4px 20px rgba(0, 0, 0, .4);--result-table-header: #6366f1;--editor-bg: #0d0d14;--panel-bg: #0d0d1a;--hero-text: #ffffff;--mode-card-bg: rgba(13, 13, 26, .8);--mode-card-border: rgba(99, 102, 241, .3);--track-primary-rgb: 99, 102, 241}[data-theme=light]{--bg-primary: #ffffff;--bg-secondary: #f8f9fc;--bg-tertiary: #eef1f6;--bg-dark: #1a1a2e;--text-primary: #1a1a2e;--text-secondary: #4a4a6a;--text-muted: #7a7a9a;--border-color: #e0e4ef;--accent-color: #6366f1;--accent-hover: #4f46e5;--accent-light: rgba(99, 102, 241, .1);--accent-glow: rgba(99, 102, 241, .2);--success-color: #10b981;--error-color: #ef4444;--warning-color: #f59e0b;--neon-purple: #a855f7;--neon-blue: #3b82f6;--neon-green: #10b981;--header-bg: linear-gradient(135deg, #1a1a2e, #16213e);--hero-bg: linear-gradient(135deg, #f0f4ff 0%, #e8ecff 50%, #f5f0ff 100%);--card-shadow: 0 4px 20px rgba(99, 102, 241, .1);--result-table-header: #6366f1;--editor-bg: #1e1e1e;--panel-bg: #ffffff;--hero-text: #1a1a2e;--mode-card-bg: #ffffff;--mode-card-border: rgba(99, 102, 241, .2);--track-primary-rgb: 99, 102, 241}:root{--space-0: 0;--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;--space-20: 5rem;--space-24: 6rem;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 10px;--radius-2xl: 12px;--radius-3xl: 16px;--radius-4xl: 24px;--radius-full: 100px;--gap-xs: var(--space-1);--gap-sm: var(--space-2);--gap-md: var(--space-3);--gap-lg: var(--space-4);--gap-xl: var(--space-6)}:root{--font-xs: .65rem;--font-sm: .75rem;--font-base: .85rem;--font-md: .9rem;--font-lg: .95rem;--font-xl: 1rem;--font-2xl: 1.1rem;--font-3xl: 1.2rem;--font-4xl: 1.3rem;--font-5xl: 2.5rem;--font-6xl: 4rem;--font-normal: 400;--font-medium: 500;--font-semibold: 600;--font-bold: 700;--font-extrabold: 800;--font-black: 900;--leading-none: 1;--leading-tight: 1.4;--leading-normal: 1.6;--leading-relaxed: 1.7;--tracking-tighter: -.02em;--tracking-tight: -.01em;--tracking-normal: 0;--tracking-wide: .05em;--tracking-wider: .08em;--tracking-widest: .1em;--tracking-ultra: .2em}:root{--breakpoint-sm: 600px;--breakpoint-md: 768px;--breakpoint-lg: 1024px;--breakpoint-xl: 1200px;--breakpoint-2xl: 1400px}body{background-color:var(--bg-secondary);color:var(--text-primary);transition:background-color .3s ease,color .3s ease}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{width:100%;height:100%;min-height:100vh;margin:0!important;padding:0!important;overflow:hidden!important}body{font-family:Noto Sans KR,-apple-system,BlinkMacSystemFont,system-ui,Roboto,Helvetica Neue,Segoe UI,Apple SD Gothic Neo,Malgun Gothic,sans-serif;font-size:14px;line-height:1.6;color:#fff;background:#0d0d1a;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}a{color:#06c;text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;font-family:inherit}code{font-family:SF Mono,Monaco,Courier New,monospace;font-size:.9em;background:#f0f0f0;padding:.1em .3em;border-radius:3px}.floating-contact{position:fixed;bottom:24px;right:24px;z-index:9999}.floating-btn{width:56px;height:56px;border-radius:50%;border:none;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-size:1.5rem;cursor:pointer;box-shadow:0 4px 15px #667eea66;transition:all .3s ease;display:flex;align-items:center;justify-content:center}.floating-btn:hover{transform:scale(1.1);box-shadow:0 6px 20px #667eea80}.floating-btn.open{background:#555;transform:rotate(90deg)}.floating-menu{position:absolute;bottom:70px;right:0;background:#fff;border-radius:12px;box-shadow:0 8px 30px #00000026;min-width:200px;overflow:hidden;animation:slideUp .2s ease-out}@keyframes slideUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.floating-menu-header{padding:12px 16px;font-weight:600;color:#333;border-bottom:1px solid #eee;font-size:.9rem}.floating-menu-item{display:flex;align-items:center;gap:10px;width:100%;padding:12px 16px;border:none;background:none;cursor:pointer;font-size:.9rem;color:#444;text-align:left;transition:background .2s}.floating-menu-item:hover{background:#f5f5f5}.floating-menu-item .icon{font-size:1.1rem;width:24px;text-align:center}.floating-menu-item.kakao:hover{background:#fee500;color:#3c1e1e}.floating-menu-item.slack:hover{background:#4a154b;color:#fff}.floating-menu-item.faq:hover{background:#e8f4fd;color:#06c}.floating-menu-item.email:hover{background:#e8f5e9;color:#2e7d32}.floating-menu-empty{display:flex;align-items:center;gap:8px;padding:16px;color:#888;font-size:.85rem}.modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background:var(--bg-primary);border-radius:12px;padding:2rem;width:100%;max-width:400px;position:relative;box-shadow:0 10px 40px #0000004d}.modal-close{position:absolute;top:1rem;right:1rem;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text-muted)}.modal-content h2{margin:0 0 1.5rem;color:var(--text-primary);text-align:center}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.5rem;color:var(--text-secondary);font-size:.9rem}.form-group input{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:6px;font-size:1rem;background:var(--bg-primary);color:var(--text-primary);box-sizing:border-box}.form-group input:focus{outline:none;border-color:var(--accent-color)}.error-message{color:var(--error-color);font-size:.85rem;margin-bottom:1rem;padding:.5rem;background:#dc35451a;border-radius:4px}.btn-primary{width:100%;padding:.75rem;background:var(--accent-color);color:#fff;border:none;border-radius:6px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s}.btn-primary:hover{background:var(--accent-hover)}.btn-primary:disabled{background:var(--text-muted);cursor:not-allowed}.divider{display:flex;align-items:center;margin:1.5rem 0}.divider:before,.divider:after{content:"";flex:1;height:1px;background:var(--border-color)}.divider span{padding:0 1rem;color:var(--text-muted);font-size:.85rem}.social-buttons{display:flex;flex-direction:column;gap:.75rem}.btn-google,.btn-kakao{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:6px;font-size:.95rem;cursor:pointer;background:var(--bg-primary);color:var(--text-primary);transition:background .2s}.btn-google:hover,.btn-kakao:hover{background:var(--bg-tertiary)}.mode-switch{margin-top:1.5rem;text-align:center;color:var(--text-muted);font-size:.9rem}.mode-switch button{background:none;border:none;color:var(--accent-color);cursor:pointer;font-weight:600}.mode-switch button:hover{text-decoration:underline}.onboarding-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;z-index:9998;pointer-events:none}.onboarding-highlight-box{position:fixed;background:transparent;border:3px solid #3b82f6;border-radius:12px;box-shadow:0 0 0 9999px #000000bf,0 0 30px #3b82f699;z-index:9999;pointer-events:none;animation:pulseHighlight 2s infinite;transition:all .4s ease}@keyframes pulseHighlight{0%,to{border-color:#3b82f6;box-shadow:0 0 0 9999px #000000bf,0 0 20px #3b82f680}50%{border-color:#60a5fa;box-shadow:0 0 0 9999px #000000bf,0 0 40px #3b82f6cc}}.onboarding-tooltip{width:360px;padding:20px;background:#fff;border-radius:16px;box-shadow:0 20px 60px #0000004d;z-index:10000;pointer-events:auto;animation:slideIn .4s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.onboarding-loading{text-align:center;padding:30px;color:#666;font-size:1rem}.onboarding-header{display:flex;justify-content:flex-end;margin-bottom:8px}.step-indicator{font-size:.8rem;color:#888;background:#f0f0f0;padding:4px 10px;border-radius:10px}.onboarding-title{margin:0 0 10px;font-size:1.25rem;font-weight:700;color:#1a1a2e}.onboarding-content{margin:0 0 20px;font-size:.95rem;line-height:1.6;color:#555}.onboarding-buttons{display:flex;justify-content:space-between;align-items:center}.btn-group{display:flex;gap:8px}.btn-skip{padding:10px 16px;font-size:.85rem;color:#888;background:transparent;border:1px solid #ddd;border-radius:8px;cursor:pointer;transition:all .2s}.btn-skip:hover{background:#f5f5f5;color:#555}.btn-prev{padding:10px 18px;font-size:.9rem;color:#555;background:#f0f0f0;border:none;border-radius:8px;cursor:pointer;transition:all .2s}.btn-prev:hover{background:#e0e0e0}.btn-next{padding:10px 22px;font-size:.95rem;font-weight:600;color:#fff;background:linear-gradient(135deg,#3b82f6,#2563eb);border:none;border-radius:8px;cursor:pointer;transition:all .2s}.btn-next:hover{background:linear-gradient(135deg,#2563eb,#1d4ed8);transform:translateY(-1px);box-shadow:0 4px 15px #2563eb66}[data-theme=dark] .onboarding-tooltip{background:#2d2d44}[data-theme=dark] .step-indicator{background:#3a3a4a;color:#aaa}[data-theme=dark] .onboarding-title{color:#fff}[data-theme=dark] .onboarding-content{color:#ccc}[data-theme=dark] .onboarding-loading{color:#aaa}[data-theme=dark] .btn-skip{color:#aaa;border-color:#3a3a4a}[data-theme=dark] .btn-skip:hover{background:#3a3a4a;color:#fff}[data-theme=dark] .btn-prev{background:#3a3a4a;color:#ccc}[data-theme=dark] .btn-prev:hover{background:#4a4a5a}.skeleton{display:inline-block;background:linear-gradient(90deg,var(--bg-tertiary, #e0e0e0) 25%,var(--bg-secondary, #f5f5f5) 50%,var(--bg-tertiary, #e0e0e0) 75%);background-size:200% 100%;animation:skeleton-shimmer 1.5s ease-in-out infinite;border-radius:6px}@keyframes skeleton-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton-text{height:1em;width:80%;margin:.5em 0}.skeleton-text.short{width:50%}.skeleton-title{height:1.5em;width:60%;margin-bottom:1em}.skeleton-card{height:120px;width:100%;border-radius:12px}.skeleton-button{height:40px;width:140px;border-radius:8px}.skeleton-avatar{width:40px;height:40px;border-radius:50%}.skeleton-page{padding:2rem;display:flex;flex-direction:column;gap:1rem}.skeleton-header{display:flex;align-items:center;gap:1rem;margin-bottom:1rem}.skeleton-row{display:flex;gap:1rem}.skeleton-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}.toast-container{position:fixed;top:20px;right:20px;z-index:9999;display:flex;flex-direction:column;gap:10px;pointer-events:none}.toast{padding:12px 24px;border-radius:8px;background:#1e1e1ee6;color:#fff;font-size:14px;font-weight:500;box-shadow:0 4px 12px #0003;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);animation:toast-in .3s ease-out;border-left:4px solid #6366f1}.toast-info{border-left-color:#6366f1}.toast-success{border-left-color:#10b981}.toast-warning{border-left-color:#f59e0b}.toast-error{border-left-color:#ef4444}@keyframes toast-in{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}.weekend-closed-container{display:flex;justify-content:center;align-items:center;min-height:calc(100vh - 100px);padding:2rem;background:radial-gradient(circle at top right,rgba(99,102,241,.05),transparent),radial-gradient(circle at bottom left,rgba(168,85,247,.05),transparent)}.weekend-closed-content{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:24px;padding:4rem 2rem;text-align:center;max-width:600px;width:100%;box-shadow:0 20px 50px #0000001a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.weekend-closed-icon{font-size:5rem;margin-bottom:2rem;display:block}.weekend-closed-content h1{font-size:2.5rem;margin-bottom:1.5rem;background:linear-gradient(135deg,#6366f1,#a855f7);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;font-weight:800}.weekend-closed-content p{font-size:1.125rem;color:var(--text-secondary);margin-bottom:.75rem;line-height:1.6}.weekend-closed-info{margin-top:3rem;padding:1rem 2rem;background:var(--bg-tertiary);border-radius:99px;display:inline-block;color:var(--text-muted);font-size:.9rem;border:1px solid var(--border-color)}@media(max-width:768px){.weekend-closed-content{padding:3rem 1.5rem}.weekend-closed-content h1{font-size:2rem}}.weekend-practice-link{margin-top:2rem}.practice-link-btn{display:inline-flex;align-items:center;gap:.5rem;padding:.875rem 2rem;background:linear-gradient(135deg,#10b981,#059669);color:#fff;text-decoration:none;border-radius:12px;font-weight:600;font-size:1rem;transition:all .3s ease;box-shadow:0 4px 15px #10b9814d}.practice-link-btn:hover{transform:translateY(-2px);box-shadow:0 8px 25px #10b98166}[data-track=core]{--track-primary: #3b82f6;--track-primary-rgb: 59, 130, 246;--track-secondary: #64748b;--track-accent: #0ea5e9;--track-gradient: linear-gradient(135deg, rgba(59, 130, 246, .2), rgba(100, 116, 139, .1));--track-glow: 0 0 15px rgba(59, 130, 246, .3)}[data-track=future]{--track-primary: #a855f7;--track-primary-rgb: 168, 85, 247;--track-secondary: #22d3ee;--track-accent: #f472b6;--track-gradient: linear-gradient(135deg, rgba(168, 85, 247, .2), rgba(34, 211, 238, .15));--track-glow: 0 0 20px rgba(168, 85, 247, .4)}.track-switcher{display:flex;background:#0003;border-radius:8px;padding:3px;gap:2px}.track-btn{padding:.4rem .8rem;border:none;border-radius:6px;background:transparent;color:#fff9;font-size:.8rem;font-weight:500;cursor:pointer;transition:all .2s;white-space:nowrap;text-decoration:none;display:inline-block}.track-btn:hover{color:#ffffffe6;background:#ffffff1a;text-decoration:none}.track-btn.active{background:#ffffff26;color:#fff;font-weight:600}[data-track=core] .track-btn.active{background:var(--track-primary);color:#fff;box-shadow:var(--track-glow)}[data-track=future] .track-btn.active{background:var(--track-primary);color:#fff;box-shadow:var(--track-glow);animation:neonPulse 2s infinite ease-in-out}@keyframes neonPulse{0%,to{box-shadow:0 0 10px #a855f766}50%{box-shadow:0 0 20px #a855f799}}.header{background:var(--track-gradient, linear-gradient(135deg, rgba(102, 126, 234, .15), rgba(118, 75, 162, .15)))}.app{display:flex;flex-direction:column;width:100%;height:100vh;min-height:100vh;overflow:hidden;padding:1rem;box-sizing:border-box}.header{display:flex;align-items:center;gap:2rem;padding:0 1.5rem;height:60px;min-height:60px;margin:0 0 1rem;background:linear-gradient(135deg,#667eea26,#764ba226);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);border-radius:16px;box-shadow:0 8px 32px #0000001a;color:#fff;flex-shrink:0;position:relative;z-index:1000}.logo{font-size:1.2rem;font-weight:700;white-space:nowrap;color:#fff;text-decoration:none}.logo:hover{opacity:.9;text-decoration:none}@keyframes neonFlicker{0%,to{opacity:1}50%{opacity:.8}}.badge-new-tiny{display:inline-block;font-size:.6rem;font-weight:800;color:#fff;background:#ef4444;padding:.1rem .3rem;border-radius:4px;vertical-align:top;margin-left:2px;box-shadow:0 0 10px #ef444480;animation:pulse-small 2s infinite}@keyframes pulse-small{0%{transform:scale(1)}50%{transform:scale(1.1)}to{transform:scale(1)}}.nav{display:flex;gap:.25rem}.nav a{padding:.5rem 1rem;color:#ffffffb3;text-decoration:none;border-radius:6px;font-size:.9rem;transition:all .2s}.nav a:hover{color:#fff;background:#ffffff1a;text-decoration:none}.nav a.active{color:#fff;background:rgba(var(--track-primary-rgb),.2);box-shadow:inset 0 0 10px rgba(var(--track-primary-rgb),.1);font-weight:600;border:1px solid rgba(var(--track-primary-rgb),.3)}.nav-disabled{display:flex;align-items:center;gap:.2rem;padding:.5rem 1rem;color:#ffffff4d;text-decoration:none;border-radius:6px;font-size:.9rem;cursor:pointer;transition:all .2s;white-space:nowrap}.nav-disabled:hover{color:#ffffff80;background:#ffffff0d}.nav-dropdown{position:relative}.nav-dropdown-trigger{display:flex;align-items:center;gap:.4rem;padding:.5rem 1rem;color:#fffc;background:transparent;border:none;border-radius:6px;font-size:.9rem;cursor:pointer;transition:all .2s}.nav-dropdown-trigger:hover,.nav-dropdown-trigger.active{color:#fff;background:#ffffff26}.dropdown-arrow{font-size:.65rem;opacity:.7;transition:transform .2s}.nav-dropdown-trigger.active .dropdown-arrow{transform:rotate(180deg)}.nav-dropdown-menu{position:absolute;top:calc(100% + 8px);left:0;min-width:180px;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:8px;box-shadow:0 8px 24px #0003;padding:.5rem;z-index:9999;animation:dropdownFadeIn .15s ease}@keyframes dropdownFadeIn{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.nav-dropdown-menu a,.nav-dropdown-item{display:flex;align-items:center;justify-content:space-between;padding:.6rem .8rem;color:var(--text-primary);text-decoration:none;border-radius:6px;font-size:.85rem;transition:all .15s}.nav-dropdown-menu a:hover{background:var(--bg-tertiary);color:var(--accent-color)}.nav-dropdown-menu a.active{background:rgba(var(--track-primary-rgb),.15);color:var(--track-primary);font-weight:600}.nav-dropdown-item.disabled{color:var(--text-muted);cursor:pointer}.nav-dropdown-item.disabled:hover{background:var(--bg-tertiary)}.badge-soon{font-size:.65rem;padding:.15rem .4rem;background:rgba(var(--track-primary-rgb),.2);color:var(--track-primary);border-radius:4px;font-weight:600}.user-stats{margin-left:auto;display:flex;align-items:center;gap:.75rem;font-size:.85rem}.streak,.level,.correct{padding:.25rem .6rem;background:#ffffff1a;border-radius:4px}.xp-bar-container{display:flex;flex-direction:column;justify-content:center;gap:2px;padding:.25rem .6rem;background:#ffffff1a;border-radius:4px;cursor:pointer;min-width:100px}.xp-info{display:flex;justify-content:space-between;align-items:center;width:100%;font-size:.7rem;font-weight:600}.xp-label{white-space:nowrap}.xp-count{font-size:.65rem;opacity:.7}.xp-bar{width:100%;height:6px;background:#fff3;border-radius:3px;overflow:hidden}.xp-fill{height:100%;background:linear-gradient(90deg,#10b981,#34d399);border-radius:3px;transition:width .3s ease}.stats-link{padding:.25rem .6rem;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:4px;color:#fff;text-decoration:none;font-weight:500;transition:all .2s}.stats-link:hover{opacity:.9;transform:translateY(-1px)}.theme-toggle{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);border-radius:50%;width:36px;height:36px;font-size:1.1rem;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center}.theme-toggle:hover{background:#fff3;transform:rotate(20deg)}.help-toggle{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);border-radius:50%;width:36px;height:36px;font-size:1rem;cursor:pointer;transition:all .3s 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