@font-face{font-family:Newsreader Variable;font-style:normal;font-display:swap;font-weight:200 800;src:url(/assets/newsreader-vietnamese-wght-normal-Czsa-EzN.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Newsreader Variable;font-style:normal;font-display:swap;font-weight:200 800;src:url(/assets/newsreader-latin-ext-wght-normal-C-3rgBeH.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Newsreader Variable;font-style:normal;font-display:swap;font-weight:200 800;src:url(/assets/newsreader-latin-wght-normal-CCVVNp6i.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:IBM Plex Sans Variable;font-style:normal;font-display:swap;font-weight:100 700;src:url(/assets/ibm-plex-sans-cyrillic-ext-wght-normal-d45eAU9y.woff2)format("woff2-variations");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:IBM Plex Sans Variable;font-style:normal;font-display:swap;font-weight:100 700;src:url(/assets/ibm-plex-sans-cyrillic-wght-normal-BAAhND-U.woff2)format("woff2-variations");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:IBM Plex Sans Variable;font-style:normal;font-display:swap;font-weight:100 700;src:url(/assets/ibm-plex-sans-greek-wght-normal-CmyJS8uq.woff2)format("woff2-variations");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:IBM Plex Sans Variable;font-style:normal;font-display:swap;font-weight:100 700;src:url(/assets/ibm-plex-sans-vietnamese-wght-normal-Dg1JeJN0.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:IBM Plex Sans Variable;font-style:normal;font-display:swap;font-weight:100 700;src:url(/assets/ibm-plex-sans-latin-ext-wght-normal-CIII54If.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:IBM Plex Sans Variable;font-style:normal;font-display:swap;font-weight:100 700;src:url(/assets/ibm-plex-sans-latin-wght-normal-IvpUvPa2.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-mono-cyrillic-ext-400-normal-xuaO2J-f.woff2)format("woff2"),url(/assets/ibm-plex-mono-cyrillic-ext-400-normal-DMdlQ8Kv.woff)format("woff");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-mono-cyrillic-400-normal-BSMlKf0J.woff2)format("woff2"),url(/assets/ibm-plex-mono-cyrillic-400-normal-CEL4l2ZJ.woff)format("woff");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-mono-vietnamese-400-normal-BulugwFq.woff2)format("woff2"),url(/assets/ibm-plex-mono-vietnamese-400-normal-DDuiU_S-.woff)format("woff");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-mono-latin-ext-400-normal-BmRBH3aV.woff2)format("woff2"),url(/assets/ibm-plex-mono-latin-ext-400-normal-D3D2R8hC.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-mono-latin-400-normal-DMJ8VG8y.woff2)format("woff2"),url(/assets/ibm-plex-mono-latin-400-normal-CvHOgSBP.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-mono-cyrillic-ext-500-normal-BqneJy0T.woff2)format("woff2"),url(/assets/ibm-plex-mono-cyrillic-ext-500-normal-BIfNGwUT.woff)format("woff");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-mono-cyrillic-500-normal-Bq9vWWag.woff2)format("woff2"),url(/assets/ibm-plex-mono-cyrillic-500-normal-Ael50iVv.woff)format("woff");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-mono-vietnamese-500-normal-DZ4AoWbu.woff2)format("woff2"),url(/assets/ibm-plex-mono-vietnamese-500-normal-C8zxqsMH.woff)format("woff");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-mono-latin-ext-500-normal-CAhNIIs5.woff2)format("woff2"),url(/assets/ibm-plex-mono-latin-ext-500-normal-CZ70TYgx.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-mono-latin-500-normal-DSY6xOcd.woff2)format("woff2"),url(/assets/ibm-plex-mono-latin-500-normal-CB9ihrfo.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{--font-serif:"Newsreader Variable", "Iowan Old Style", Georgia, serif;--font-sans:"IBM Plex Sans Variable", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mono:"IBM Plex Mono", ui-monospace, SFMono-Regular, Consolas, monospace;font-family:var(--font-sans);color:#17202b;font-synthesis:none;-webkit-text-size-adjust:100%;--header-height:73px;--page-width:720px;--content-width:560px;--bg:#f6f5f1;--surface:#fff;--surface-2:#f9f8f5;--ink:#17202b;--ink-2:#3a4553;--muted:#676d78;--line:#e3e0d8;--line-strong:#cbc7bb;--accent:#1f5b45;--accent-hover:#174634;--accent-soft:#eaf1ed;--accent-line:#b7d0c2;--accent-ink:#fff;--success:#1e6a4c;--success-soft:#ebf3ee;--success-line:#a9cdb9;--warn:#8a4b12;--warn-mid:#b8742f;--warn-soft:#fbf2e6;--warn-line:#e5c59d;--danger:#9b2c1f;--danger-soft:#fbeeeb;--danger-line:#e4bcb3;--radius:4px;--radius-card:6px;--shadow-card:0 1px 0 #17202b08;--shadow-lift:0 1px 0 #17202b0d, 0 8px 20px #17202b12;--ease-out:cubic-bezier(.2, .7, .2, 1);background:#f6f5f1}@keyframes rise-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}@keyframes pop-in{0%{opacity:0;transform:scale(.94)}to{opacity:1;transform:none}}.screen-enter{animation:rise-in .32s var(--ease-out) both}*{box-sizing:border-box}body{min-width:280px;margin:0}button,input,select,textarea{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}button,summary{cursor:pointer;touch-action:manipulation}button:disabled{cursor:not-allowed;opacity:.55}a{color:inherit;text-underline-offset:3px;touch-action:manipulation}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--accent);outline-offset:3px}input,select,textarea{font-size:16px}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.2;font-family:var(--font-serif);font-optical-sizing:auto;letter-spacing:-.01em;font-weight:600}body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.6}.case-feedback h3,.case-reveal h3,.framework-method h3,.lesson-group>h3,.framework-related h3,.previous-case-review h3,.recall-item h4{font-family:var(--font-sans);letter-spacing:0}[hidden]{display:none!important}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-content{z-index:100;border-radius:var(--radius);background:var(--ink);color:#fff;opacity:0;pointer-events:none;padding:12px 18px;position:fixed;top:-100px;left:16px}.skip-content:focus{opacity:1;pointer-events:auto;top:12px}.site-header{z-index:20;border-bottom:1px solid var(--line);-webkit-backdrop-filter:saturate(1.6)blur(14px);backdrop-filter:saturate(1.6)blur(14px);background:#f6f5f1e6;position:sticky;top:0}h1,h2,h3,[tabindex="-1"]{scroll-margin-top:90px}h1[tabindex="-1"]:focus,h2[tabindex="-1"]:focus,h3[tabindex="-1"]:focus{outline:none}.site-header-inner{max-width:var(--page-width);justify-content:space-between;align-items:center;gap:16px;min-height:72px;margin:auto;padding:0 24px;display:flex}.site-brand{min-height:44px;color:var(--ink);font-family:var(--font-serif);letter-spacing:-.01em;align-items:center;font-size:23px;font-weight:600;text-decoration:none;display:inline-flex}.site-nav{gap:4px;display:flex}.site-nav a{border-radius:var(--radius-card);min-height:44px;color:var(--muted);place-items:center;padding:0 16px;font-size:14px;font-weight:600;text-decoration:none;transition:background .15s,color .15s;display:grid}.site-nav a:hover:not([aria-current=page]){color:var(--ink);background:var(--surface-2)}.site-nav a[aria-current=page]{background:var(--accent-soft);color:var(--accent)}.page-container,.math-page{max-width:var(--page-width);margin:0 auto;padding:0 24px 40px}.page-heading{margin:22px 0 18px}.page-heading h1{letter-spacing:-.015em;margin:0 0 6px;font-size:34px;font-weight:600}.page-heading p{color:var(--muted);margin-bottom:0;font-size:14px;line-height:1.65}.case-eyebrow{font-family:var(--font-sans);letter-spacing:.01em;color:var(--accent);align-items:center;gap:6px;font-size:12px;font-weight:600;line-height:1.6;display:inline-flex}.case-start-button{border-radius:var(--radius);background:var(--accent-soft);min-height:44px;color:var(--accent);border:0;justify-content:center;align-items:center;gap:8px;padding:10px 16px;font-size:13px;font-weight:600;transition:background .15s,transform .1s;display:inline-flex}.case-start-button:hover{background:var(--accent-line)}.case-start-button:active:not(:disabled){transform:scale(.98)}.case-local-note,.case-source-citation{color:var(--muted);margin-top:18px;font-size:11px;line-height:1.8}.case-storage-warning{background:var(--warn-soft);border:1px solid var(--warn-line);border-radius:var(--radius);color:var(--warn);margin-top:18px;padding:12px 16px;font-size:12px;line-height:1.6}.surface{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card)}.about-page>section,.about-page>.page-heading{max-width:var(--content-width);margin-left:auto;margin-right:auto}.profile-card{padding:24px}.profile-heading{align-items:center;gap:16px;margin-bottom:22px;display:flex}.profile-heading img{border-radius:var(--radius-card);object-fit:cover;background:var(--line);flex-shrink:0}.profile-heading h2{letter-spacing:-.01em;margin:0 0 7px;font-size:22px}.profile-heading span{color:var(--muted);align-items:center;gap:5px;font-size:13px;display:flex}.profile-card p,.about-now p{color:var(--muted);margin-bottom:14px;font-size:14px;line-height:1.8}.profile-card>p:first-of-type{color:var(--ink)}.social-links{flex-wrap:wrap;gap:4px 16px;margin-top:18px;display:flex}.social-links a{justify-content:center;align-items:center;gap:6px;min-width:44px;min-height:44px;font-size:13px;text-decoration:none;display:inline-flex}.social-links a:hover,.project-link:hover{text-decoration:underline}.social-links a>span{font-weight:750}.projects-section,.about-now{margin-top:30px;scroll-margin-top:24px}.projects-section>h2,.about-now h2{letter-spacing:-.01em;margin-bottom:16px;font-size:18px;font-weight:650}.project-list{gap:12px;display:grid}.project-card{padding:20px}.project-heading{justify-content:space-between;align-items:center;gap:12px;display:flex}.project-heading h3{overflow-wrap:anywhere;margin:0;font-size:16px;font-weight:650}.project-status{background:var(--surface-2);color:var(--muted);border-radius:var(--radius);flex-shrink:0;padding:4px 8px;font-size:11px}.project-card p{color:var(--muted);overflow-wrap:anywhere;margin:12px 0 8px;font-size:14px;line-height:1.75}.project-link{min-height:44px;color:var(--ink);align-items:center;gap:6px;font-size:13px;text-decoration:none;display:inline-flex}.about-now{border-top:1px solid var(--line);padding-top:24px}@media (width<=560px){:root{--header-height:65px}.site-header-inner{gap:10px;min-height:64px;padding:0 16px}.site-brand{font-size:20px}.site-nav a{padding:0 9px;font-size:13px}.page-container,.math-page{padding:0 16px 32px}.profile-card{padding:20px}.project-card{padding:18px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.brain-setup,.results-screen,.leaderboard-screen,.play-screen{max-width:var(--content-width);margin-left:auto;margin-right:auto}.setup-card,.question-card,.results-card,.leaderboard-message,.leaderboard-table-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);min-width:0;box-shadow:var(--shadow-card)}.setup-card{background:0 0;border:0;border-radius:0;padding:0}.setup-card fieldset{border:0;min-width:0;margin:0;padding:0}.operation-fieldset>legend,.duration-fieldset>legend{margin-bottom:12px;font-size:13px;font-weight:600}.duration-options input{opacity:0;width:1px;height:1px;position:absolute}.operation-choice:has(input:focus-visible){outline:3px solid var(--accent);outline-offset:3px}.duration-options label:has(input:focus-visible){outline:3px solid var(--accent);outline-offset:3px}.ranges-grid{gap:18px;margin-top:18px;display:grid}.range-group legend{margin-bottom:10px;font-size:13px;font-weight:600}.range-group:disabled{opacity:.4}.range-expression{gap:8px;display:flex}.range-part{flex:1;align-items:center;gap:8px;min-width:0;display:flex}.range-operator{color:var(--muted);flex-shrink:0;font-size:16px}.range-pair{flex:1;align-items:center;gap:6px;min-width:0;display:flex}.range-pair input{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);width:100%;min-width:0;min-height:48px;color:var(--ink);text-align:center;appearance:textfield;padding:8px 2px;font-size:16px}.range-pair input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.range-pair input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.range-pair>span,.range-note{color:var(--muted);font-size:12px}.range-note{margin:12px 0 22px;line-height:1.7}.score-settings{color:var(--muted);font-size:12px;font-weight:400}.score-settings summary{cursor:pointer;min-height:44px;padding:12px 0;line-height:20px}.score-settings p{margin:0 0 8px;line-height:1.6}.math-button{background:var(--accent);min-height:48px;color:var(--accent-ink);border:1px solid var(--accent);border-radius:var(--radius);box-shadow:none;justify-content:center;align-items:center;gap:10px;padding:12px 20px;font-size:14px;font-weight:650;text-decoration:none;transition:background .15s,transform .1s,box-shadow .15s;display:inline-flex}.math-button:active:not(:disabled){transform:scale(.98)}.math-button:disabled{box-shadow:none}.math-button:hover:not(:disabled),.math-button:active:not(:disabled){background:var(--accent-hover)}.start-button{width:100%;margin-top:18px}.start-note,.results-note{text-align:center;color:var(--muted);margin:16px 0 0;font-size:12px;line-height:1.7}.quiet-button{border-radius:var(--radius);min-width:44px;min-height:44px;color:var(--muted);background:0 0;border:0;justify-content:center;align-items:center;gap:7px;padding:10px 12px;font-size:13px;font-weight:500;text-decoration:none;display:inline-flex}.quiet-button:hover:not(:disabled){background:var(--accent-soft);color:var(--accent)}.quiet-button>span{font-size:20px}.setup-footer{justify-content:space-between;align-items:center;gap:8px;margin-top:14px;display:flex}.settings-error{border:1px solid var(--danger-line);border-radius:var(--radius-card);background:var(--danger-soft);color:var(--danger);margin:18px 0;padding:12px 16px;font-size:13px;line-height:1.7}.settings-error button{min-width:60px;min-height:44px;color:inherit;border:1px solid var(--danger-line);border-radius:var(--radius);background:0 0;margin-left:8px;padding:8px 12px}.play-screen{margin-top:12px}.results-screen{margin-top:32px}.round-topline{justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px;display:flex}.round-topline h1{letter-spacing:-.01em;margin:0;font-size:22px;font-weight:650}.round-stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-bottom:16px;display:grid}.round-stats>div{border-bottom:1px solid var(--line);color:var(--muted);justify-content:center;align-items:center;padding:10px;display:flex}.round-stats>div>span{text-align:left;font-size:12px}.round-stats strong{color:var(--ink);font-family:var(--mono);font-variant-numeric:tabular-nums;margin-top:4px;font-size:24px;font-weight:500;display:block}.round-stats .urgent strong{color:var(--danger)}.question-card{text-align:center;border:0;border-radius:0;padding:24px 0;position:relative;overflow:hidden}.question-counter,.section-index{font-family:var(--mono);color:var(--muted);letter-spacing:0;font-size:12px}.equation{font-family:var(--font-serif);font-variant-numeric:lining-nums tabular-nums;animation:pop-in .22s var(--ease-out) both;letter-spacing:-.01em;font-variant-numeric:tabular-nums;flex-wrap:wrap;justify-content:center;align-items:center;gap:16px;margin:28px 0;font-size:clamp(26px,6vw,50px);font-weight:650;display:flex}.equation-symbol{color:var(--accent)}.equals,.question-mark{color:var(--muted)}.question-card.is-correct .answer-input{border-color:var(--success);background:var(--success-soft);color:var(--success)}.answer-input{border:1px solid var(--line-strong);border-radius:var(--radius-card);background:var(--surface);width:min(100%,300px);height:64px;color:var(--ink);text-align:center;font-family:var(--mono);margin:auto;padding:8px;scroll-margin-top:24px;scroll-margin-bottom:100px;font-size:32px;transition:border-color .12s,background .12s;display:block}.answer-input::placeholder{color:var(--muted);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:16px}.answer-help{min-height:20px;color:var(--muted);margin:12px 0 8px;font-size:12px;line-height:1.7}.skip-button{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);min-height:44px;color:var(--muted);justify-content:center;align-items:center;gap:8px;padding:10px 16px;font-size:13px;display:inline-flex}.skip-button:hover:not(:disabled){background:var(--accent-soft);color:var(--accent)}.results-screen>h1{letter-spacing:-.01em;margin-bottom:24px;font-size:clamp(30px,5vw,36px);font-weight:700}.results-card{margin-bottom:26px;padding:26px}.result-score{font-family:var(--font-serif);font-variant-numeric:lining-nums;animation:pop-in .4s 80ms var(--ease-out) both;color:var(--ink);letter-spacing:-.01em;flex-direction:column;align-items:center;gap:12px;margin:20px 0;font-size:60px;font-weight:600;line-height:1;display:flex}.result-score>span{letter-spacing:0;color:var(--muted);font-size:13px;font-weight:400}.result-details{border-top:1px solid var(--line);border-bottom:1px solid var(--line);grid-template-columns:repeat(3,minmax(0,1fr));margin:24px 0 18px;padding:20px 0;display:grid}.result-details>div+div{border-left:1px solid var(--line)}.result-details strong{font-family:var(--mono);margin-bottom:7px;font-size:22px;font-weight:500;display:block}.result-details span{color:var(--muted);font-size:12px}.result-context{color:var(--muted);flex-wrap:wrap;justify-content:center;align-items:center;gap:10px;margin:0;font-size:12px;display:flex}.result-actions{flex-direction:column;align-items:center;gap:8px;display:flex}.result-actions .math-button{width:min(100%,260px)}.publish-form{text-align:left;margin-bottom:26px}.publish-form label{margin-bottom:9px;font-size:13px;font-weight:600;display:block}.publish-form>div{gap:8px;display:flex}.publish-form input{background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--radius);flex:1;width:100%;min-width:0;min-height:48px;padding:12px}.publish-form button{flex-shrink:0}.publish-form p{color:var(--muted);margin:10px 0 0;font-size:12px;line-height:1.6}.publish-success{color:var(--success);justify-content:center;align-items:center;gap:8px;margin-bottom:24px;font-size:14px;display:flex}.leaderboard-screen .round-topline{margin:16px 0 0}.leaderboard-screen .page-heading{margin-top:12px}.leaderboard-message{text-align:center;color:var(--muted);padding:40px 20px;font-size:14px;line-height:1.7}.leaderboard-message p{color:var(--ink);margin-bottom:8px;font-weight:600}.leaderboard-table-wrap{overflow-x:auto}.leaderboard-table{table-layout:fixed;border-collapse:collapse;text-align:left;width:100%;font-size:14px}.leaderboard-table th,.leaderboard-table td{border-bottom:1px solid var(--line);padding:16px}.leaderboard-table thead{background:var(--surface-2);color:var(--muted);font-size:12px}.leaderboard-table thead th{font-weight:500}.leaderboard-table th:first-child{width:64px}.leaderboard-table th:last-child{width:84px}.leaderboard-table tbody th{overflow-wrap:anywhere;font-weight:500}.leaderboard-table td:first-child{color:var(--accent);font-family:var(--mono)}.leaderboard-table td:last-child,.leaderboard-table th:last-child{text-align:right;font-variant-numeric:tabular-nums}.leaderboard-table tbody tr:last-child>*{border-bottom:0}@media (width<=560px){.play-screen{margin-top:8px}.results-screen{margin-top:24px}.round-stats{gap:6px}.round-stats>div{gap:6px;padding:12px 6px}.round-stats>div>svg{width:15px}.round-stats>div>span{font-size:11px}.round-stats strong{font-size:21px}.question-card{padding:12px 0 16px}.equation{gap:10px;margin:16px 0 18px;font-size:clamp(28px,8vw,36px)}.round-stats{margin-bottom:4px}.results-card{padding:24px 16px}.result-details span{font-size:11px}.leaderboard-table th,.leaderboard-table td{padding:14px 12px}}@media (width<=420px){.publish-form>div{flex-direction:column}.range-expression,.range-part,.range-pair{gap:4px}.range-pair input{padding:8px 1px}}.settings-controls{gap:26px;display:grid}.operation-fieldset>legend,.duration-fieldset>legend{color:var(--ink);margin-bottom:10px;font-size:13px;font-weight:600}.operation-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;display:grid}.operation-choice{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);min-height:84px;color:var(--muted);cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:6px;padding:10px 4px;transition:border-color .15s,color .15s,box-shadow .15s;display:flex;position:relative}.operation-choice input{opacity:0;cursor:pointer;margin:0;position:absolute;inset:0}.operation-choice .op-symbol{font-family:var(--font-sans);color:var(--line-strong);font-size:30px;font-weight:300;line-height:1;transition:color .15s}.operation-choice .op-name{font-size:12px;font-weight:500}.operation-choice.is-selected{border-color:var(--ink);color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}.operation-choice.is-selected .op-symbol{color:var(--accent)}.duration-options{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);grid-template-columns:repeat(4,minmax(0,1fr));gap:3px;padding:3px;display:grid}.duration-options label{border-radius:var(--radius);min-height:42px;color:var(--muted);font-variant-numeric:tabular-nums;cursor:pointer;place-items:center;font-size:13px;font-weight:500;transition:background .15s,color .15s;display:grid;position:relative}.duration-options label.is-selected{background:var(--ink);color:#fff}.range-details{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.range-details summary{min-height:52px;color:var(--ink);cursor:pointer;align-items:center;gap:12px;font-size:13px;font-weight:600;list-style:none;display:flex}.range-details summary::-webkit-details-marker{display:none}.range-details summary:after{content:"";border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);width:7px;height:7px;margin:0 4px 3px 0;transition:transform .2s;transform:rotate(45deg)}.range-details[open] summary:after{margin-bottom:-3px;transform:rotate(-135deg)}.range-summary{font-family:var(--mono);color:var(--muted);text-align:right;margin-left:auto;font-size:12px;font-weight:400}.range-details .ranges-grid{margin:4px 0 0}.range-details .range-note{margin:12px 0 18px}.start-button{margin-top:26px}@media (hover:hover){.operation-choice:not(.is-selected):hover{border-color:var(--line-strong);color:var(--ink-2)}.duration-options label:not(.is-selected):hover{color:var(--ink);background:var(--surface-2)}}@media (width<=380px){.operation-grid{gap:6px}.operation-choice{min-height:76px}.operation-choice .op-symbol{font-size:26px}.operation-choice .op-name,.range-summary{font-size:11px}}.question-card{box-shadow:none;background:0 0}.round-stats{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);gap:0}.round-stats>div{border-bottom:0;padding:10px 6px}.round-stats>div+div{border-left:1px solid var(--line)}.round-stats>div>span{text-align:center}.results-screen{text-align:left}.results-screen>h1{letter-spacing:-.015em;margin:22px 0 18px;font-size:34px;font-weight:600}.results-card,.results-note{text-align:center}