*,:after,:before{--tw-border-spacing-x:0;--tw-border-spacing-y:0;--tw-translate-x:0;--tw-translate-y:0;--tw-rotate:0;--tw-skew-x:0;--tw-skew-y:0;--tw-scale-x:1;--tw-scale-y:1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness:proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-color:rgba(59,130,246,.5);--tw-ring-offset-shadow:0 0 #0000;--tw-ring-shadow:0 0 #0000;--tw-shadow:0 0 #0000;--tw-shadow-colored:0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }::backdrop{--tw-border-spacing-x:0;--tw-border-spacing-y:0;--tw-translate-x:0;--tw-translate-y:0;--tw-rotate:0;--tw-skew-x:0;--tw-skew-y:0;--tw-scale-x:1;--tw-scale-y:1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness:proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-color:rgba(59,130,246,.5);--tw-ring-offset-shadow:0 0 #0000;--tw-ring-shadow:0 0 #0000;--tw-shadow:0 0 #0000;--tw-shadow-colored:0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }/*
! tailwindcss v3.4.19 | MIT License | https://tailwindcss.com
*/*,:after,:before{box-sizing:border-box;border:0 solid #e5e7eb}:after,:before{--tw-content:""}:host,html{line-height:1.5;-webkit-text-size-adjust:100%;-moz-tab-size:4;-o-tab-size:4;tab-size:4;font-family:ui-sans-serif,system-ui,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji;font-feature-settings:normal;font-variation-settings:normal;-webkit-tap-highlight-color:transparent}body{line-height:inherit}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,pre,samp{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-feature-settings:normal;font-variation-settings:normal;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}button,input,optgroup,select,textarea{font-family:inherit;font-feature-settings:inherit;font-variation-settings:inherit;font-size:100%;font-weight:inherit;line-height:inherit;letter-spacing:inherit;color:inherit;margin:0;padding:0}button,select{text-transform:none}button,input:where([type=button]),input:where([type=reset]),input:where([type=submit]){-webkit-appearance:button;background-color:transparent;background-image:none}:-moz-focusring{outline:auto}:-moz-ui-invalid{box-shadow:none}progress{vertical-align:baseline}::-webkit-inner-spin-button,::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}summary{display:list-item}blockquote,dd,dl,figure,h1,h2,h3,h4,h5,h6,hr,p,pre{margin:0}fieldset{margin:0}fieldset,legend{padding:0}menu,ol,ul{list-style:none;margin:0;padding:0}dialog{padding:0}textarea{resize:vertical}input::-moz-placeholder,textarea::-moz-placeholder{opacity:1;color:#9ca3af}input::placeholder,textarea::placeholder{opacity:1;color:#9ca3af}[role=button],button{cursor:pointer}:disabled{cursor:default}audio,canvas,embed,iframe,img,object,svg,video{display:block;vertical-align:middle}img,video{max-width:100%;height:auto}[hidden]:where(:not([hidden=until-found])){display:none}.visible{visibility:visible}.mx-auto{margin-left:auto;margin-right:auto}.mt-1{margin-top:.25rem}.mt-2{margin-top:.5rem}.mt-4{margin-top:1rem}.flex{display:flex}.grid{display:grid}.min-h-screen{min-height:100vh}.max-w-md{max-width:28rem}.grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-2{gap:.5rem}.overflow-x-auto{overflow-x:auto}.px-2{padding-left:.5rem;padding-right:.5rem}.px-4{padding-left:1rem;padding-right:1rem}.py-2{padding-top:.5rem;padding-bottom:.5rem}.py-4{padding-top:1rem;padding-bottom:1rem}.pb-1{padding-bottom:.25rem}.pb-24{padding-bottom:6rem}.text-3xl{font-size:1.875rem;line-height:2.25rem}.text-sm{font-size:.875rem;line-height:1.25rem}.font-medium{font-weight:500}.font-semibold{font-weight:600}.leading-7{line-height:1.75rem}.text-brand{--tw-text-opacity:1;color:rgb(24 179 107/var(--tw-text-opacity,1))}.text-ink{--tw-text-opacity:1;color:rgb(23 32 51/var(--tw-text-opacity,1))}.text-muted{--tw-text-opacity:1;color:rgb(109 119 136/var(--tw-text-opacity,1))}.text-red-500{--tw-text-opacity:1;color:rgb(239 68 68/var(--tw-text-opacity,1))}.filter{filter:var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow)}:root{color-scheme:light;-webkit-tap-highlight-color:transparent}body,html{min-height:100%;background:#f5f6f8}body{margin:0;color:#172033;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif}button,input,select{font:inherit}.safe-bottom{padding-bottom:env(safe-area-inset-bottom)}.serene-app{overflow-x:hidden;background:linear-gradient(160deg,#eef4ff,#edf1ff 42%,#f7f4ff)}#app-root,.serene-app{position:relative}.serene-header{position:sticky;top:0;z-index:20;padding:max(18px,env(safe-area-inset-top)) 16px 12px;color:#fff}.serene-header>div{min-height:98px;padding:18px;border-radius:0 0 30px 30px;background:linear-gradient(135deg,rgba(83,132,247,.95),rgba(130,70,202,.94));box-shadow:0 18px 38px rgba(70,60,164,.28)}.serene-header p{margin:0 0 4px;color:hsla(0,0%,100%,.82);font-size:13px}.serene-header h1{margin:0;font-size:25px;font-weight:800;letter-spacing:0}.fav-btn,.icon-btn{display:grid;place-items:center;width:44px;height:44px;flex-shrink:0;border:0;border-radius:16px;background:hsla(0,0%,100%,.22);color:#fff;box-shadow:inset 0 1px 0 hsla(0,0%,100%,.2)}.metric-card{min-height:76px;padding:12px 10px;border-radius:18px;background:#fff;box-shadow:0 12px 26px rgba(67,74,126,.13)}.metric-card p{margin:0;color:#7a8192;font-size:12px}.metric-card strong{display:block;margin-top:5px;color:#182035;font-size:21px;font-weight:800}.category-pill{height:38px;flex-shrink:0;padding:0 14px;border:0;border-radius:999px;background:#fff;color:#626b80;font-size:14px;box-shadow:0 9px 18px rgba(75,69,158,.1)}.category-active{color:#fff;background:linear-gradient(135deg,#2d8bff,#8848d4)}.random-row{display:grid;grid-template-columns:1fr 88px;gap:10px;margin-top:12px}.random-btn{height:42px;border:0;border-radius:16px;background:#fff;color:#354054;font-weight:750;box-shadow:0 10px 20px rgba(67,74,126,.12)}.random-active{color:#fff;background:linear-gradient(135deg,#2e8cff,#884bd4)}.random-secondary{color:#6f7688}.search-panel{margin-top:12px;padding:12px;border-radius:20px;background:hsla(0,0%,100%,.72);box-shadow:0 12px 24px rgba(67,74,126,.1)}.search-panel label{display:block;margin-bottom:8px;color:#4e586d;font-size:13px;font-weight:750}.search-box{display:grid;grid-template-columns:1fr 58px;gap:8px}.search-box input{min-width:0;height:42px;padding:0 13px;border:1px solid #e3e8f4;border-radius:15px;background:#fff;color:#172033;outline:none;box-shadow:inset 0 1px 0 hsla(0,0%,100%,.9)}.search-box input:focus{border-color:#6b8cff;box-shadow:0 0 0 3px rgba(91,124,255,.15)}.search-box button{height:42px;border:0;border-radius:15px;background:#eef2ff;color:#5061c9;font-size:13px;font-weight:750}.search-hint,.search-summary{margin:9px 2px 0;color:#778093;font-size:12px}.search-results{margin-top:8px}.search-result{display:grid;width:100%;grid-template-columns:38px 1fr;gap:8px;margin-top:8px;padding:9px;border:0;border-radius:15px;background:#fff;text-align:left;box-shadow:0 8px 16px rgba(67,74,126,.08)}.search-result span{display:grid;height:30px;place-items:center;border-radius:11px;background:#eef3ff;color:#3866dd;font-weight:800}.search-result strong{overflow:hidden;color:#30394f;font-size:13px;font-weight:650;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.empty-card,.quiz-card,.stats-hero,.stats-row{border-radius:28px;background:#fff;box-shadow:0 20px 44px rgba(46,49,112,.2)}.quiz-card{padding:22px 18px}.question-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;color:#6f7789;font-size:13px}.question-shell{margin:-6px -4px 16px;padding:16px 14px;border-radius:22px;background:linear-gradient(180deg,#f8fbff,#f3f6ff);border:1px solid rgba(115,139,218,.16)}.question-title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.question-title-row p{margin:0;color:#182035;font-size:19px;font-weight:750;line-height:1.65}.question-title-row p span{margin-right:8px;color:#3866dd;font-weight:850}.fav-btn{background:#f3f5fb;color:#778093}.fav-active{background:linear-gradient(135deg,#ffcc4d,#ff8a34);color:#fff}.option-list{display:grid;gap:10px}.option-card{display:grid;min-height:60px;width:100%;grid-template-columns:36px 1fr;align-items:flex-start;gap:12px;padding:14px;border:1px solid #eef1f8;border-radius:20px;background:#fff;text-align:left;line-height:1.55;box-shadow:0 12px 24px rgba(52,58,100,.09)}.option-card span:first-child{display:grid;width:34px;height:34px;place-items:center;border-radius:12px;background:#f0f3f9;color:#657085;font-size:14px;font-weight:800}.option-card strong{padding-top:3px;font-size:16px;font-weight:650;color:#384052}.option-selected{border-color:#6486ff;background:#f4f7ff}.option-selected span:first-child{background:#5f77f2;color:#fff}.option-right{border-color:#49b887;background:#f0fff8}.option-right span:first-child{background:#26a66f;color:#fff}.option-wrong{border-color:#f2a6a6;background:#fff5f5}.option-wrong span:first-child{background:#ef5757;color:#fff}.answer-box{margin-top:18px;padding:13px 15px;border-radius:18px;background:#f4f7ff;color:#30394f;font-size:14px;line-height:1.7}.quiz-card .answer-box p{margin:0;font-size:14px;font-weight:600}.action-btn{height:50px;border:0;border-radius:19px;font-weight:750;box-shadow:0 12px 22px rgba(55,60,122,.14)}.action-btn.primary{color:#fff;background:linear-gradient(135deg,#2e8cff,#884bd4)}.action-btn.ghost,.action-btn.secondary,.redo-btn{color:#354054;background:hsla(0,0%,100%,.9)}.redo-btn{margin-top:12px;height:44px;width:100%;border:0;border-radius:18px;font-size:14px}.bottom-nav{position:sticky;bottom:0;z-index:30;margin-top:22px;border-radius:28px 28px 0 0;background:#fff;box-shadow:0 -16px 34px rgba(42,48,96,.18)}.tab-btn{display:flex;height:58px;flex-direction:column;align-items:center;justify-content:center;gap:2px;border:0;border-radius:18px;background:transparent;color:#7d8495;font-size:12px}.tab-btn span{font-size:19px}.tab-active{color:#5d6df0;background:#f1f4ff}.stats-hero{padding:22px 20px}.stats-hero p{margin:0}.stats-row{margin-top:10px;padding:14px}.progress-track{height:8px;margin-top:16px;overflow:hidden;border-radius:999px;background:#edf0f7}.progress-track.small{margin-top:12px}.progress-fill{height:100%;border-radius:inherit;background:linear-gradient(90deg,#2e8cff,#9148d8)}.empty-card{padding:48px 18px;text-align:center}.empty-card p{margin:0;color:#182035;font-weight:750}.empty-card small{display:block;margin-top:8px;color:#7a8192}