@import "https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;700;900&display=swap";:root{--md-primary:#006d48;--md-on-primary:#fff;--md-primary-ctr:#8df8c8;--md-on-primary-ctr:#00210f;--md-secondary:#4c6358;--md-on-secondary:#fff;--md-secondary-ctr:#cee9d8;--md-tertiary:#3e6374;--md-surface:#f5fbf5;--md-surface-ctr:#dae5de;--md-on-surface:#181d19;--md-on-surface-var:#414942;--md-outline:#717971;--md-outline-var:#c0c9c0;--md-error:#ba1a1a;--glass:#ffffff8c;--glass-strong:#ffffffc7;--glass-border:#ffffffd9;--glass-blur:blur(20px);--glass-shadow:0 8px 32px #003c1e14;--bg-base:#eaf5ef;--bg-card:var(--glass);--bg-elevated:var(--glass-strong);--border:var(--md-outline-var);--border-light:#0000000f;--text-primary:var(--md-on-surface);--text-secondary:var(--md-on-surface-var);--text-muted:var(--md-outline);--accent:var(--md-primary);--accent-light:#34c38a;--accent-glow:#006d482e;--green:#006d48;--red:var(--md-error);--teal:#2aad78;--gradient-hero:linear-gradient(135deg, #006d48, #34c38a);--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:28px;--radius-full:9999px;--ease:cubic-bezier(.2, 0, 0, 1);--bounce:cubic-bezier(.34, 1.56, .64, 1)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg-base);color:var(--text-primary);-webkit-font-smoothing:antialiased;min-height:100vh;font-family:Noto Sans KR,system-ui,-apple-system,sans-serif;line-height:1.6}img{max-width:100%;display:block}button{cursor:pointer;background:0 0;border:none;font-family:inherit}input,textarea,select{font-family:inherit}a{color:inherit;text-decoration:none}.app{flex-direction:column;min-height:100vh;display:flex}.main-content{flex:1;padding-top:64px}.splash{background:var(--bg-base);z-index:999;flex-direction:column;justify-content:center;align-items:center;gap:32px;display:flex;position:fixed;inset:0}.splash-logo{align-items:center;gap:14px;font-size:28px;font-weight:700;display:flex}.splash-badge{background:var(--gradient-hero);border-radius:var(--radius-md);color:#fff;width:52px;height:52px;box-shadow:0 4px 20px var(--accent-glow);justify-content:center;align-items:center;font-size:24px;font-weight:900;display:flex}.splash-bar{background:var(--md-surface-ctr);border-radius:var(--radius-full);width:200px;height:3px;overflow:hidden}.splash-bar-fill{background:var(--gradient-hero);border-radius:var(--radius-full);height:100%;animation:1.5s forwards loadBar}@keyframes loadBar{0%{width:0}to{width:100%}}.page-loading{justify-content:center;align-items:center;min-height:60vh;display:flex}.spinner{border:3px solid var(--md-surface-ctr);border-top-color:var(--accent);border-radius:50%;width:40px;height:40px;animation:.7s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.navbar{z-index:100;background:var(--glass-strong);height:64px;-webkit-backdrop-filter:var(--glass-blur);border-bottom:1px solid var(--border-light);position:fixed;top:0;left:0;right:0;box-shadow:0 1px 3px #0000000a}.nav-inner{align-items:center;gap:32px;max-width:1200px;height:100%;margin:0 auto;padding:0 24px;display:flex}.nav-logo{white-space:nowrap;align-items:center;gap:10px;font-size:17px;font-weight:700;display:flex}.logo-badge{background:var(--gradient-hero);color:#fff;width:34px;height:34px;box-shadow:0 2px 8px var(--accent-glow);border-radius:9px;flex-shrink:0;justify-content:center;align-items:center;font-size:16px;font-weight:900;display:flex}.logo-badge.lg{border-radius:16px;width:56px;height:56px;font-size:26px}.logo-text{color:var(--text-primary)}.nav-links{flex:1;align-items:center;gap:4px;display:flex}.nav-link{border-radius:var(--radius-full);color:var(--text-secondary);transition:all .2s var(--ease);padding:8px 16px;font-size:14px;font-weight:500}.nav-link:hover{color:var(--text-primary);background:#006d4814}.nav-link.active{color:var(--md-primary);background:var(--md-primary-ctr);font-weight:700}.nav-link-create{background:var(--md-primary-ctr);color:var(--md-on-primary-ctr);border:none;font-weight:700}.nav-link-create:hover{background:#b0ffd8}.nav-right{align-items:center;gap:12px;margin-left:auto;display:flex}.btn-login{background:var(--md-primary);border-radius:var(--radius-full);color:var(--md-on-primary);transition:all .2s var(--ease);box-shadow:0 2px 8px var(--accent-glow);padding:10px 24px;font-size:14px;font-weight:700}.btn-login:hover{box-shadow:0 4px 16px var(--accent-glow);transform:translateY(-1px)}.user-menu-wrap{position:relative}.avatar-btn{border:2px solid var(--md-surface-ctr);border-radius:50%;width:36px;height:36px;transition:all .2s;overflow:hidden}.avatar-btn:hover{border-color:var(--accent)}.avatar-img{object-fit:cover;width:100%;height:100%}.avatar-initials{background:var(--gradient-hero);color:#fff;justify-content:center;align-items:center;width:100%;height:100%;font-size:13px;font-weight:700;display:flex}.dropdown-menu{background:var(--glass-strong);width:220px;-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--border-light);border-radius:var(--radius-lg);box-shadow:var(--glass-shadow);animation:fadeInDown .15s var(--ease);position:absolute;top:calc(100% + 10px);right:0;overflow:hidden}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}.dropdown-user-info{padding:14px 16px}.dropdown-name{color:var(--text-primary);font-size:14px;font-weight:700}.dropdown-email{color:var(--text-muted);font-size:12px}.dropdown-divider{border:none;border-top:1px solid var(--border-light)}.dropdown-item{text-align:left;width:100%;color:var(--text-primary);padding:12px 16px;font-size:14px;transition:all .15s;display:block}.dropdown-item:hover{background:#006d480f}.dropdown-item.danger{color:var(--red)}.btn{border-radius:var(--radius-full);letter-spacing:.02em;height:40px;transition:all .2s var(--ease);white-space:nowrap;justify-content:center;align-items:center;gap:8px;padding:10px 24px;font-size:14px;font-weight:500;display:inline-flex}.btn-primary{background:var(--md-primary);color:var(--md-on-primary);box-shadow:0 1px 3px #00000026,0 1px 2px #0003}.btn-primary:hover:not(:disabled){background:#00855a;box-shadow:0 2px 6px #00000026,0 4px 12px #006d4840}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-outline{border:1px solid var(--md-outline);color:var(--md-primary);background:0 0}.btn-outline:hover:not(:disabled){background:#006d4814}.btn-tonal{background:var(--md-primary-ctr);color:var(--md-on-primary-ctr)}.btn-tonal:hover:not(:disabled){background:#b0ffd8;box-shadow:0 1px 3px #0000001a}.btn-danger{color:var(--red);background:#ba1a1a14;border:1px solid #ba1a1a40}.btn-danger:hover{background:#ba1a1a24}.btn-lg{height:48px;padding:0 32px;font-size:16px}.btn-full{width:100%}.btn-sm{height:32px;padding:0 14px;font-size:12px}.btn-text{color:var(--md-primary);border-radius:var(--radius-md);padding:8px 12px;font-weight:500}.btn-text:hover{background:#006d4814}.container{max-width:1200px;margin:0 auto;padding:0 24px}.page-header{border-bottom:1px solid var(--border-light);margin-bottom:40px;padding:48px 0 32px}.page-header h1{color:var(--text-primary);margin-bottom:6px;font-size:28px;font-weight:900}.page-header p{color:var(--text-secondary)}.section{padding:60px 0}.section-title{color:var(--text-primary);margin-bottom:24px;font-size:22px;font-weight:700}.section-header{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.hero{text-align:center;padding:100px 24px 80px;position:relative;overflow:hidden}.hero-orbs{pointer-events:none;position:absolute;inset:0}.orb{filter:blur(100px);opacity:.3;border-radius:50%;position:absolute}.orb-1{background:#8df8c8;width:500px;height:500px;animation:8s ease-in-out infinite orbFloat;top:-200px;left:-100px}.orb-2{background:#34c38a;width:400px;height:400px;animation:10s ease-in-out infinite reverse orbFloat;bottom:-150px;right:-100px}.orb-3{background:#a8e6cf;width:300px;height:300px;margin:-150px;animation:7s ease-in-out 2s infinite orbFloat;top:50%;left:50%}@keyframes orbFloat{0%,to{transform:translateY(0)}50%{transform:translateY(-30px)}}.hero-content{z-index:1;max-width:720px;margin:0 auto;position:relative}.hero-badge{background:var(--md-primary-ctr);border-radius:var(--radius-full);color:var(--md-on-primary-ctr);border:1px solid #006d4833;align-items:center;margin-bottom:24px;padding:6px 16px;font-size:13px;font-weight:700;display:inline-flex}.hero-title{letter-spacing:-.02em;color:var(--text-primary);margin-bottom:20px;font-size:clamp(36px,6vw,56px);font-weight:900;line-height:1.2}.gradient-text{background:var(--gradient-hero);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.hero-subtitle{color:var(--text-secondary);margin-bottom:40px;font-size:17px}.hero-actions{flex-wrap:wrap;justify-content:center;gap:14px;margin-bottom:48px;display:flex}.hero-stats{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius-xl);-webkit-backdrop-filter:var(--glass-blur);box-shadow:var(--glass-shadow);align-items:center;gap:24px;padding:20px 32px;display:inline-flex}.stat{text-align:center}.stat-num{color:var(--md-primary);font-size:26px;font-weight:900;display:block}.stat-label{color:var(--text-muted);font-size:12px}.stat-sep{background:var(--md-outline-var);width:1px;height:36px}.category-grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:14px;display:grid}.category-card{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius-lg);-webkit-backdrop-filter:var(--glass-blur);transition:all .2s var(--bounce);cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:10px;padding:24px 12px;display:flex}.category-card:hover{border-color:var(--accent);box-shadow:0 8px 24px var(--accent-glow);transform:translateY(-4px)}.category-emoji{font-size:32px}.category-name{color:var(--text-secondary);font-size:13px;font-weight:600}.quiz-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px;display:grid}.quiz-skeleton{background:linear-gradient(90deg, var(--glass) 25%, var(--glass-strong) 50%, var(--glass) 75%);border-radius:var(--radius-lg);background-size:400% 100%;height:200px;animation:1.5s infinite shimmer}@keyframes shimmer{0%{background-position:100%}to{background-position:0%}}.quiz-card{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius-lg);cursor:pointer;transition:all .2s var(--bounce);-webkit-backdrop-filter:var(--glass-blur);box-shadow:var(--glass-shadow);flex-direction:column;gap:10px;padding:20px;display:flex}.quiz-card:hover{border-color:var(--accent);box-shadow:0 12px 32px var(--accent-glow);transform:translateY(-4px)}.quiz-card-header{justify-content:space-between;align-items:center;display:flex}.quiz-card-category{color:var(--md-primary);font-size:12px;font-weight:700}.quiz-card-plays{color:var(--text-muted);font-size:12px}.quiz-card-title{color:var(--text-primary);font-size:16px;font-weight:700;line-height:1.4}.quiz-card-desc{color:var(--text-secondary);-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;font-size:13px;line-height:1.5;display:-webkit-box;overflow:hidden}.quiz-card-meta{flex-wrap:wrap;gap:10px;margin-top:auto;display:flex}.quiz-card-meta span{color:var(--text-muted);font-size:12px}.quiz-card-actions{border-top:1px solid var(--border-light);gap:8px;padding-top:12px;display:flex}.empty-state{text-align:center;flex-direction:column;align-items:center;gap:12px;padding:64px 24px;display:flex}.empty-emoji{font-size:56px}.empty-state h3{color:var(--text-primary);font-size:20px;font-weight:700}.empty-state p{color:var(--text-secondary)}.explore-toolbar{flex-direction:column;gap:16px;margin-bottom:32px;display:flex}.search-box{background:var(--glass);border:1px solid var(--md-outline-var);border-radius:var(--radius-full);-webkit-backdrop-filter:var(--glass-blur);align-items:center;gap:12px;padding:10px 20px;transition:all .2s;display:flex}.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.search-icon{color:var(--text-muted);font-size:16px}.search-box input{color:var(--text-primary);background:0 0;border:none;outline:none;flex:1;font-size:15px}.search-box input::placeholder{color:var(--text-muted)}.search-clear{color:var(--text-muted);font-size:18px;transition:all .15s}.search-clear:hover{color:var(--text-primary)}.filter-chips{flex-wrap:wrap;gap:8px;display:flex}.chip{background:var(--glass);border:1px solid var(--md-outline-var);border-radius:var(--radius-full);color:var(--text-secondary);transition:.2s var(--ease);cursor:pointer;padding:6px 14px;font-size:13px;font-weight:500}.chip:hover{border-color:var(--accent);color:var(--md-primary)}.chip-active{background:var(--md-primary-ctr);border-color:var(--md-primary);font-weight:700;color:var(--md-on-primary-ctr)!important}.auth-page{justify-content:center;align-items:center;min-height:calc(100vh - 64px);padding:40px 24px;display:flex}.auth-card{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius-xl);width:100%;max-width:440px;box-shadow:var(--glass-shadow);-webkit-backdrop-filter:var(--glass-blur);padding:40px}.auth-split-layout{grid-template-columns:1fr;gap:24px;width:100%;max-width:800px;display:grid}@media (width>=768px){.auth-split-layout{grid-template-columns:1fr 1fr;align-items:stretch}}.auth-col{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius-xl);-webkit-backdrop-filter:var(--glass-blur);box-shadow:var(--glass-shadow);flex-direction:column;padding:32px 28px;display:flex}.auth-col-title{text-align:center;color:var(--text-primary);border-bottom:2px solid var(--md-primary-ctr);margin-bottom:20px;padding-bottom:14px;font-size:16px;font-weight:700}.auth-logo{text-align:center;grid-column:1/-1;width:100%;margin-bottom:32px}.auth-logo h1{color:var(--text-primary);margin-top:14px;font-size:22px;font-weight:900}.auth-logo p{color:var(--text-secondary);margin-top:4px;font-size:14px}.auth-tabs{display:none}.form-group{flex-direction:column;gap:6px;margin-bottom:16px;display:flex;position:relative}.form-group label{color:var(--text-secondary);letter-spacing:.04em;text-transform:uppercase;font-size:12px;font-weight:500}input[type=text],input[type=email],input[type=password],input[type=number],textarea,select{background:var(--glass-strong);border:1px solid var(--md-outline-var);border-radius:var(--radius-md);width:100%;color:var(--text-primary);transition:all .2s var(--ease);outline:none;padding:14px 16px;font-size:15px}input:focus,textarea:focus,select:focus{border-color:var(--md-primary);box-shadow:0 0 0 3px var(--accent-glow);background:#fff}input::placeholder,textarea::placeholder{color:var(--text-muted)}.form-group input,.form-group textarea,.form-group select{background:var(--glass-strong);border:1px solid var(--md-outline-var);border-radius:var(--radius-md);color:var(--text-primary);outline:none;width:100%;padding:14px 16px;font-size:15px;transition:all .2s}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.form-group textarea{resize:vertical}.form-group select{appearance:none;cursor:pointer}.required{color:var(--red)}.char-count{color:var(--text-muted);font-size:11px;position:absolute;bottom:-20px;right:12px}.btn-google{border:1px solid var(--md-outline-var);border-radius:var(--radius-full);width:100%;height:48px;color:var(--text-primary);cursor:pointer;background:#fff;justify-content:center;align-items:center;gap:10px;padding:14px;font-size:15px;font-weight:500;transition:all .2s;display:flex;box-shadow:0 1px 3px #00000014}.btn-google:hover{background:#f5f5f5;box-shadow:0 2px 8px #0000001f}.divider{color:var(--text-muted);align-items:center;gap:12px;margin:20px 0;font-size:13px;display:flex}.divider:before,.divider:after{content:"";background:var(--md-outline-var);flex:1;height:1px}.form{flex-direction:column;gap:16px;display:flex}.create-container{flex-direction:column;gap:20px;max-width:720px;margin:0 auto;padding-bottom:60px;display:flex}.create-card{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius-xl);-webkit-backdrop-filter:var(--glass-blur);box-shadow:var(--glass-shadow);padding:28px}.create-section-title{color:var(--text-primary);margin-bottom:20px;font-size:18px;font-weight:700}.form-row{grid-template-columns:1fr 1fr;gap:16px;display:grid}.question-editor{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius-xl);-webkit-backdrop-filter:var(--glass-blur);box-shadow:var(--glass-shadow);flex-direction:column;gap:16px;padding:24px;transition:all .2s;display:flex}.question-editor:hover{border-color:var(--accent)}.q-editor-header{align-items:center;gap:12px;display:flex}.q-num{color:var(--md-primary);white-space:nowrap;font-size:13px;font-weight:900}.q-type-toggle{background:var(--md-surface-ctr);border-radius:var(--radius-sm);gap:3px;margin-left:auto;padding:3px;display:flex}.type-btn{color:var(--text-muted);border-radius:6px;padding:5px 12px;font-size:12px;font-weight:600;transition:all .2s}.type-btn.active{background:var(--md-primary);color:#fff}.btn-remove-q{color:var(--text-muted);font-size:16px;transition:all .15s}.btn-remove-q:hover{color:var(--red)}.options-list{flex-direction:column;gap:8px;display:flex}.option-item{background:var(--glass-strong);border:1.5px solid var(--md-outline-var);border-radius:var(--radius-md);cursor:pointer;align-items:center;gap:12px;padding:10px 14px;transition:all .2s;display:flex}.option-item:hover{border-color:var(--accent)}.option-item.correct{border-color:var(--green);background:#006d4814}.option-radio{border:2px solid var(--md-outline-var);border-radius:50%;flex-shrink:0;width:18px;height:18px;transition:all .2s}.option-radio.selected{border-color:var(--green);background:var(--green);box-shadow:0 0 8px var(--accent-glow)}.option-item input{color:var(--text-primary);background:0 0;border:none;outline:none;flex:1;font-size:14px}.option-hint{color:var(--text-muted);font-size:12px}.btn-add-question{border:2px dashed var(--md-outline-var);border-radius:var(--radius-xl);color:var(--text-muted);cursor:pointer;background:0 0;justify-content:center;align-items:center;gap:8px;padding:18px;font-size:15px;font-weight:600;transition:all .2s;display:flex}.btn-add-question:hover{border-color:var(--accent);color:var(--md-primary);background:#006d480a}.create-actions{justify-content:flex-end;gap:12px;padding-top:8px;display:flex}.quiz-detail-page{padding:40px 0 80px}.quiz-detail-card{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius-xl);max-width:680px;-webkit-backdrop-filter:var(--glass-blur);box-shadow:var(--glass-shadow);margin:0 auto;overflow:hidden}.quiz-detail-top{border-bottom:1px solid var(--border-light);background:linear-gradient(135deg,#006d4814,#8df8c81f);padding:36px 36px 28px}.quiz-detail-cat{background:var(--md-primary-ctr);border-radius:var(--radius-full);color:var(--md-on-primary-ctr);border:1px solid #006d4833;align-items:center;gap:6px;margin-bottom:14px;padding:4px 12px;font-size:12px;font-weight:700;display:inline-flex}.quiz-detail-title{color:var(--text-primary);margin-bottom:10px;font-size:28px;font-weight:900;line-height:1.3}.quiz-detail-desc{color:var(--text-secondary);font-size:15px}.quiz-detail-meta{border-bottom:1px solid var(--border-light);flex-wrap:wrap;gap:10px;padding:20px 36px;display:flex}.meta-pill{background:var(--md-surface-ctr);border-radius:var(--radius-full);color:var(--text-secondary);padding:6px 14px;font-size:13px}.quiz-detail-actions{border-top:1px solid var(--border-light);flex-wrap:wrap;align-items:center;gap:16px;padding:24px 36px;display:flex}.action-group-left{flex-wrap:wrap;flex:1;gap:8px;min-width:250px;display:flex}.btn-sm{padding:8px 14px;font-size:13px}.btn-danger{color:var(--red)!important;border-color:#d32f2f33!important}.btn-danger:hover{border-color:var(--red)!important;background:#d32f2f0d!important}.leaderboard{border-bottom:1px solid var(--border-light);padding:24px 36px}.leaderboard-title{color:var(--text-primary);margin-bottom:14px;font-size:16px;font-weight:700}.leaderboard-list{flex-direction:column;gap:8px;display:flex}.lb-row{background:var(--glass-strong);border-radius:var(--radius-md);align-items:center;gap:12px;padding:10px 14px;font-size:14px;transition:all .2s;display:flex}.lb-row.lb-top{background:var(--md-primary-ctr);border:1px solid #006d4826}.lb-row.lb-me{border-left:3px solid var(--teal)}.lb-rank{text-align:center;width:30px;color:var(--text-primary);flex-shrink:0;font-weight:700}.lb-name{color:var(--text-primary);flex:1;font-weight:500}.lb-score{color:var(--md-primary);font-weight:700}.lb-pct{color:var(--text-muted);margin-left:4px;font-size:12px}.lb-time{color:var(--text-muted);text-align:right;min-width:40px;font-size:12px}.lb-empty{text-align:center;color:var(--text-muted);padding:24px;font-size:14px}.play-page{flex-direction:column;min-height:calc(100vh - 64px);display:flex}.play-header{background:var(--glass-strong);-webkit-backdrop-filter:var(--glass-blur);border-bottom:1px solid var(--border-light);z-index:10;justify-content:space-between;align-items:center;padding:12px 24px;display:flex;position:sticky;top:64px}.play-progress-info{align-items:center;gap:12px;display:flex}.play-q-num{color:var(--md-primary);font-size:15px;font-weight:700}.play-quiz-title{color:var(--text-muted);font-size:13px}.timer-wrap{flex-shrink:0;justify-content:center;align-items:center;width:50px;height:50px;display:flex;position:relative}.timer-svg{position:absolute;inset:0;transform:rotate(-90deg)}.timer-track{fill:none;stroke:var(--md-surface-ctr);stroke-width:3px}.timer-fill{fill:none;stroke:var(--md-primary);stroke-width:3px;stroke-linecap:round;transition:stroke-dasharray .9s linear}.timer-num{z-index:1;color:var(--text-primary);font-size:15px;font-weight:700;position:relative}.timer-urgent .timer-fill{stroke:var(--red)}.timer-urgent .timer-num{color:var(--red)}.timer-urgent{animation:.5s infinite urgentPulse}@keyframes urgentPulse{0%,to{transform:scale(1)}50%{transform:scale(1.08)}}.play-progress-bar{background:var(--md-surface-ctr);height:4px}.play-progress-fill{background:var(--gradient-hero);height:100%;transition:width .3s var(--ease)}.play-container{flex-direction:column;flex:1;gap:24px;width:100%;max-width:680px;margin:0 auto;padding:40px 24px;display:flex}.question-card{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius-xl);animation:fadeInUp .3s var(--ease);-webkit-backdrop-filter:var(--glass-blur);box-shadow:var(--glass-shadow);padding:32px}@keyframes fadeInUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}.q-badge{background:var(--md-primary-ctr);border-radius:var(--radius-full);color:var(--md-on-primary-ctr);margin-bottom:14px;padding:4px 12px;font-size:12px;font-weight:700;display:inline-flex}.q-text{color:var(--text-primary);font-size:20px;font-weight:700;line-height:1.5}.options-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.option-btn{background:var(--glass);border:1.5px solid var(--md-outline-var);border-radius:var(--radius-md);color:var(--text-primary);text-align:left;transition:all .2s var(--bounce);cursor:pointer;animation:fadeInUp .3s var(--ease) backwards;align-items:center;gap:12px;padding:14px 18px;font-size:14px;font-weight:500;display:flex}.option-btn:first-child{animation-delay:50ms}.option-btn:nth-child(2){animation-delay:.1s}.option-btn:nth-child(3){animation-delay:.15s}.option-btn:nth-child(4){animation-delay:.2s}.option-btn:not(:disabled):not(.correct):not(.wrong):not(.dimmed):hover{border-color:var(--accent);background:#006d480f;transform:translateY(-2px)}.option-btn:disabled{cursor:default}.option-btn.correct{border-color:var(--green);color:var(--green);background:#006d481a}.option-btn.wrong{border-color:var(--red);color:var(--red);background:#ba1a1a14}.option-btn.dimmed{opacity:.45}.opt-letter{background:var(--md-surface-ctr);width:28px;height:28px;color:var(--text-primary);border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;font-weight:700;display:flex}.opt-text{flex:1}.opt-check{color:var(--green);font-weight:700}.opt-x{color:var(--red);font-weight:700}.answer-feedback{border-radius:var(--radius-lg);text-align:center;animation:fadeInUp .25s var(--ease);flex-direction:column;align-items:center;gap:8px;padding:20px 24px;display:flex}.feedback-correct{background:#006d4814;border:1px solid #006d4833}.feedback-wrong{background:#ba1a1a0f;border:1px solid #ba1a1a26}.feedback-icon{font-size:36px}.feedback-text{color:var(--text-primary);font-size:16px;font-weight:700}.feedback-explanation{color:var(--text-secondary);font-size:13px}.btn-next{align-self:center;min-width:220px}.results-page{padding:48px 0 80px}.results-card{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius-xl);max-width:640px;-webkit-backdrop-filter:var(--glass-blur);box-shadow:var(--glass-shadow);margin:0 auto;overflow:hidden}.results-header{text-align:center;background:linear-gradient(135deg,#006d480f,#8df8c81a);padding:40px 36px 12px}.results-title{color:var(--text-primary);font-size:28px;font-weight:900}.results-msg{color:var(--text-secondary);margin-top:4px;font-size:15px}.score-board{text-align:center;border-bottom:1px solid var(--border-light);background:linear-gradient(135deg,#006d480a,#8df8c80f);padding:24px 36px 32px}.score-circle-wrap{width:150px;height:150px;margin:0 auto 20px;position:relative}.score-circle-svg{width:100%;height:100%;transform:rotate(-90deg)}.circle-bg{stroke:var(--md-surface-ctr);stroke-width:8px}.circle-prog{stroke:var(--md-primary);stroke-width:8px;stroke-linecap:round;transition:stroke-dashoffset .8s}.score-text{justify-content:center;align-items:center;gap:2px;display:flex;position:absolute;inset:0}.sc-num{color:var(--md-primary);font-size:42px;font-weight:900}.sc-div{color:var(--text-muted);margin:0 2px;font-size:20px}.sc-tot{color:var(--text-secondary);font-size:20px;font-weight:700}.score-stats{justify-content:center;gap:0;margin-top:20px;display:flex}.stat-box{text-align:center;border-right:1px solid var(--border-light);flex:1;padding:12px}.stat-box:last-child{border-right:none}.stat-val{color:var(--md-primary);font-size:22px;font-weight:900}.stat-lbl{color:var(--text-muted);margin-top:2px;font-size:12px}.res-stat{border-right:1px solid var(--border-light);flex-direction:column;flex:1;align-items:center;gap:4px;padding:18px;display:flex}.res-stat:last-child{border-right:none}.res-stat-icon{font-size:20px}.res-stat-val{color:var(--md-primary);font-size:22px;font-weight:900}.res-stat-label{color:var(--text-muted);font-size:12px}.review-section{padding:0 36px 28px}.review-section h3{color:var(--text-primary);margin-bottom:14px;font-size:16px;font-weight:700}.review-list{flex-direction:column;gap:10px;display:flex}.review-item{border-radius:var(--radius-md);border-left:3px solid #0000;padding:14px 16px}.review-correct{border-left-color:var(--green);background:#006d480f}.review-wrong{border-left-color:var(--red);background:#ba1a1a0d}.review-q-header{gap:10px;margin-bottom:6px;display:flex}.review-result{flex-shrink:0;font-size:16px}.review-q-text{color:var(--text-primary);font-size:14px;line-height:1.5}.review-answers{flex-wrap:wrap;gap:12px;font-size:12px;display:flex}.review-wrong-ans{color:var(--red)}.review-correct-ans{color:var(--green)}.review-explanation{color:var(--text-muted);margin-top:6px;font-size:12px}.results-actions{border-top:1px solid var(--border-light);flex-wrap:wrap;justify-content:center;gap:10px;padding:24px 36px;display:flex}.dash-stats{grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:28px;display:grid}.dash-stat-card{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius-lg);text-align:center;-webkit-backdrop-filter:var(--glass-blur);box-shadow:var(--glass-shadow);padding:24px}.dash-stat-icon{margin-bottom:8px;font-size:28px}.dash-stat-num{color:var(--md-primary);font-size:32px;font-weight:900}.dash-stat-label{color:var(--text-muted);margin-top:4px;font-size:13px}.dash-actions{margin-bottom:24px}.toast-container{z-index:9999;pointer-events:none;flex-direction:column;gap:10px;display:flex;position:fixed;bottom:24px;right:24px}.toast{border-radius:var(--radius-lg);animation:toastIn .25s var(--bounce);min-width:260px;-webkit-backdrop-filter:var(--glass-blur);align-items:center;gap:10px;padding:13px 20px;font-size:14px;font-weight:500;display:flex;box-shadow:0 8px 32px #0000001f}@keyframes toastIn{0%{opacity:0;transform:translate(100%)}to{opacity:1;transform:none}}.toast--success{color:var(--green);background:#006d481f;border:1px solid #006d4840}.toast--error{color:var(--red);background:#ba1a1a1a;border:1px solid #ba1a1a33}.toast--info{color:var(--md-primary);background:#006d4814;border:1px solid #006d4826}.toast-icon{font-size:16px}@media (width<=768px){.nav-links{display:none}.options-grid,.form-row{grid-template-columns:1fr}.hero{padding:64px 20px 48px}.hero-stats{flex-direction:column;gap:16px}.stat-sep{display:none}.dash-stats{grid-template-columns:1fr}.quiz-detail-card,.results-card{border-radius:0}.leaderboard,.quiz-detail-top,.quiz-detail-meta,.quiz-detail-actions,.review-section,.results-top,.results-actions{padding-left:20px;padding-right:20px}.score-ring-wrap{width:130px;height:130px}}@media (width<=480px){.quiz-grid{grid-template-columns:1fr}.category-grid{grid-template-columns:repeat(4,1fr)}}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg-base)}::-webkit-scrollbar-thumb{background:var(--md-surface-ctr);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--md-outline)}#root{min-height:100vh}