:root{--base: #eef1f8;--ink: #12151c;--muted: #4d5462;--hairline: rgb(22 32 60 / .11);--glass: rgb(255 255 255 / .62);--glass-float: rgb(255 255 255 / .68);--glass-solid: rgb(255 255 255 / .88);--glass-edge: rgb(255 255 255 / .85);--glass-shine: rgb(255 255 255 / .9);--field: rgb(255 255 255 / .62);--field-hover: rgb(255 255 255 / .92);--sunk: rgb(22 32 60 / .07);--accent: #0b5fd8;--accent-soft: rgb(11 95 216 / .1);--grad: linear-gradient(135deg, #0b6bff 0%, #5a4bff 100%);--ring-a: #0b6bff;--ring-b: #7a4dff;--good: #137a48;--good-soft: rgb(19 160 90 / .14);--ring-good-a: #12b76a;--ring-good-b: #0ea5a4;--bad: #c2281f;--bad-soft: rgb(225 50 40 / .11);--warn: #855400;--warn-soft: rgb(240 170 40 / .17);--b1: #79b4ff;--b2: #c3a6ff;--b3: #8fe6d0;--blob: .62;--shadow: 0 1px 2px rgb(22 32 60 / .05), 0 16px 36px -18px rgb(22 32 60 / .28);--shadow-lift: 0 2px 4px rgb(22 32 60 / .06), 0 26px 48px -20px rgb(22 42 110 / .42);--blur: blur(28px) saturate(175%);--sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "Segoe UI", system-ui, sans-serif;--display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", "Segoe UI", system-ui, sans-serif;--r-sm: 12px;--r: 16px;--r-lg: 24px;--spring: cubic-bezier(.22, 1.2, .36, 1);color-scheme:light}:root[data-theme=dark]{--base: #090c14;--ink: #f2f4f9;--muted: #b1b8c6;--hairline: rgb(255 255 255 / .11);--glass: rgb(34 39 54 / .62);--glass-float: rgb(34 39 54 / .66);--glass-solid: rgb(34 39 54 / .88);--glass-edge: rgb(255 255 255 / .12);--glass-shine: rgb(255 255 255 / .14);--field: rgb(255 255 255 / .06);--field-hover: rgb(255 255 255 / .13);--sunk: rgb(255 255 255 / .09);--accent: #79b6ff;--accent-soft: rgb(121 182 255 / .15);--ring-a: #4f9bff;--ring-b: #a78bff;--good: #63e3a4;--good-soft: rgb(60 220 140 / .14);--ring-good-a: #34e0a1;--ring-good-b: #2dd4d4;--bad: #ff978d;--bad-soft: rgb(255 110 100 / .14);--warn: #f4c870;--warn-soft: rgb(240 180 70 / .14);--b1: #1d55b8;--b2: #5634b4;--b3: #0f7f79;--blob: .55;--shadow: 0 1px 2px rgb(0 0 0 / .3), 0 18px 40px -18px rgb(0 0 0 / .65);--shadow-lift: 0 2px 4px rgb(0 0 0 / .3), 0 28px 54px -18px rgb(0 0 0 / .8);color-scheme:dark}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;background:var(--base)}body{margin:0;color:var(--ink);font:400 17px/1.6 var(--sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4{margin:0;font-family:var(--display);font-weight:650;line-height:1.2;letter-spacing:-.012em}h1{font-size:clamp(2rem,1.5rem + 2.2vw,2.9rem);font-weight:700;line-height:1.08;letter-spacing:-.028em}h3{font-size:1.14rem;line-height:1.3;margin-bottom:10px}h4{font-size:.98rem}p{margin:0}a{color:var(--accent);text-underline-offset:2px}ul,ol{margin:0;padding:0}button,input,textarea{font:inherit;color:inherit}button{cursor:pointer}button:disabled{cursor:default}:focus-visible{outline:2.5px solid var(--accent);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.eyebrow{display:block;font-size:.76rem;font-weight:600;line-height:1.4;letter-spacing:.01em;color:var(--muted)}.aurora{position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;overflow:hidden;pointer-events:none}.aurora i{position:absolute;width:70vmax;height:70vmax;border-radius:50%;opacity:var(--blob);will-change:transform}.aurora i:nth-child(1){top:-30vmax;left:-18vmax;background:radial-gradient(closest-side,var(--b1),transparent);animation:drift-a 52s ease-in-out infinite alternate}.aurora i:nth-child(2){top:-18vmax;right:-24vmax;background:radial-gradient(closest-side,var(--b2),transparent);animation:drift-b 64s ease-in-out infinite alternate}.aurora i:nth-child(3){bottom:-38vmax;left:16vw;background:radial-gradient(closest-side,var(--b3),transparent);animation:drift-c 58s ease-in-out infinite alternate}@keyframes drift-a{to{transform:translate(14vmax,12vmax) scale(1.12)}}@keyframes drift-b{to{transform:translate(-16vmax,14vmax) scale(.92)}}@keyframes drift-c{to{transform:translate(12vmax,-14vmax) scale(1.1)}}.hero-card,.progress-card,.stat,.week-tile,.panel,.topic-body,.path,.award,.flashcard{position:relative;background:var(--glass);border:1px solid var(--glass-edge);border-radius:var(--r-lg);box-shadow:var(--shadow),inset 0 1px 0 var(--glass-shine)}.toast,.moment,.modal,.masthead-inner:before{background:var(--glass-float);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);border:1px solid var(--glass-edge);box-shadow:var(--shadow-lift),inset 0 1px 0 var(--glass-shine)}.panel{padding:24px}.sheen{--mx: 50%;--my: 0%;overflow:hidden}.sheen:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:inherit;pointer-events:none;opacity:0;transition:opacity .35s;background:radial-gradient(340px circle at var(--mx) var(--my),rgb(255 255 255 / .38),transparent 70%)}:root[data-theme=dark] .sheen:after{background:radial-gradient(340px circle at var(--mx) var(--my),rgb(255 255 255 / .1),transparent 70%)}.sheen:hover:after{opacity:1}.rise{animation:rise .6s var(--spring) backwards;animation-delay:calc(var(--i, 0) * 45ms)}@keyframes rise{0%{opacity:0;transform:translateY(16px) scale(.985)}}.masthead{position:sticky;top:0;z-index:20;padding:12px 16px 0;pointer-events:none}.masthead-inner{position:relative;isolation:isolate;pointer-events:auto;max-width:1040px;margin:0 auto;padding:6px 8px 6px 18px;display:flex;align-items:center;gap:16px;border-radius:999px}.masthead-inner:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;z-index:-1;border-radius:inherit}.brand{display:flex;align-items:center;gap:9px;color:var(--ink);text-decoration:none;margin-right:auto}.brand-mark{width:22px;height:22px;border-radius:7px;background:var(--grad);box-shadow:inset 0 1px #ffffff80,0 3px 8px -2px #1e46dc99;position:relative}.brand-mark:after{content:"";position:absolute;top:7px;right:7px;bottom:7px;left:7px;border-radius:50%;background:#fff}.brand-name{font:680 1.14rem/1 var(--display);letter-spacing:-.02em}.brand-unit{font-size:.74rem;font-weight:500;color:var(--muted)}.masthead nav{display:flex;gap:2px}.masthead nav a{display:flex;align-items:center;gap:7px;padding:8px 13px;border-radius:999px;color:var(--muted);text-decoration:none;font-size:.9rem;font-weight:550;transition:color .2s,background .2s}.masthead nav a:hover{color:var(--ink);background:var(--sunk)}.masthead nav a.on{color:var(--accent);background:var(--field-hover);box-shadow:0 1px 3px #16203c24,inset 0 1px 0 var(--glass-shine)}.icon-btn{display:grid;place-items:center;width:42px;height:42px;border:0;background:none;color:var(--muted);border-radius:50%;transition:background .2s,color .2s,transform .3s var(--spring)}.icon-btn:hover{background:var(--sunk);color:var(--ink);transform:rotate(14deg)}.page{max-width:1040px;margin:0 auto;padding:28px 16px 80px;animation:page-in .45s ease-out backwards}@keyframes page-in{0%{opacity:0;transform:translateY(8px)}}.narrow{max-width:720px}.btn{scroll-margin-block:96px;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:9px 20px;border:1px solid var(--hairline);border-radius:999px;background:var(--field);color:var(--ink);font-weight:600;font-size:.95rem;text-decoration:none;box-shadow:inset 0 1px 0 var(--glass-shine);transition:transform .25s var(--spring),background .2s,box-shadow .25s,filter .2s}.btn:hover:not(:disabled){background:var(--field-hover);transform:translateY(-1px)}.btn:active:not(:disabled){transform:scale(.97)}.btn:disabled{opacity:.5}.btn.primary{position:relative;background:var(--grad);border-color:transparent;color:#fff;box-shadow:inset 0 1px #fff6,0 10px 22px -10px #2846f0bf}.btn.primary:hover:not(:disabled){background:var(--grad);filter:brightness(1.08);box-shadow:inset 0 1px #fff6,0 16px 28px -10px #2846f0d9}.btn.large{padding:12px 24px;font-size:1rem}.btn.small{min-height:38px;padding:6px 14px;font-size:.86rem}.link-btn{background:none;border:0;padding:8px 0;color:var(--muted);text-decoration:underline;font-size:.9rem}.row{display:flex;flex-wrap:wrap;gap:10px}.row.center{justify-content:center}.pill{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:8px 15px;border-radius:999px;background:var(--field);border:1px solid var(--hairline);color:var(--ink);text-decoration:none;font-size:.9rem;font-weight:500;transition:background .2s,transform .25s var(--spring)}.pill:hover{background:var(--field-hover);transform:translateY(-1px)}.pill svg{color:var(--accent)}.cite{display:inline-block;font-size:.72rem;font-weight:550;line-height:1.55;padding:0 7px;border-radius:999px;background:var(--sunk);color:var(--muted);border:0;white-space:nowrap;vertical-align:1px;font-variant-numeric:tabular-nums}button.cite{color:var(--accent);background:var(--accent-soft)}button.cite:hover{text-decoration:underline}.ring{position:relative;display:inline-grid;place-items:center;flex:none}.ring svg{position:absolute;top:0;right:0;bottom:0;left:0}.ring-a{stop-color:var(--ring-a)}.ring-b{stop-color:var(--ring-b)}.ring.good .ring-a{stop-color:var(--ring-good-a)}.ring.good .ring-b{stop-color:var(--ring-good-b)}.ring-track{stroke:var(--sunk)}.ring-value{transition:stroke-dashoffset .8s ease;animation:ring-draw 1.1s cubic-bezier(.2,.7,.2,1) backwards}@keyframes ring-draw{0%{stroke-dashoffset:var(--full)}}.ring-center{position:relative;display:flex;flex-direction:column;align-items:center;line-height:1.05}.ring-center strong{font:700 1.9rem/1 var(--display);letter-spacing:-.03em;font-variant-numeric:tabular-nums}.ring-center small{color:var(--muted);font-size:.76rem;margin-top:3px;font-weight:500;font-variant-numeric:tabular-nums}.meter{height:6px;background:var(--sunk);border-radius:999px;overflow:hidden}.meter i{display:block;height:100%;background:var(--grad);border-radius:999px;transition:width .5s ease}.run-track{height:5px;margin-bottom:14px;background:var(--sunk);border-radius:999px;overflow:hidden}.run-track i{display:block;height:100%;background:var(--grad);border-radius:999px;transition:width .5s var(--spring)}.bento{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:14px;margin-bottom:14px}.hero-card{padding:36px 36px 32px}.hero-card h1{margin:12px 0 14px;font-size:clamp(2.2rem,1.5rem + 2.8vw,3.4rem);background:linear-gradient(110deg,var(--ink) 35%,var(--accent) 120%);-webkit-background-clip:text;background-clip:text;color:transparent;padding-bottom:.08em}.hero-sub{font-size:1.06rem;color:var(--muted);max-width:580px;margin-bottom:24px}.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px;position:relative;z-index:1}.hero-actions .btn{white-space:normal;text-align:left}.progress-card{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:24px 20px}.progress-card .ring-center strong{font-size:2.3rem}.progress-note{font-size:.86rem;color:var(--muted)}.next-award{position:relative;z-index:1;display:flex;align-items:center;gap:11px;width:100%;padding:10px 12px;border-radius:var(--r);background:var(--field);color:var(--ink);text-decoration:none;transition:background .2s}.next-award:hover{background:var(--field-hover)}.next-award>span:last-child{flex:1;min-width:0}.next-award small{display:block;font-size:.72rem;color:var(--muted)}.next-award strong{display:block;font-size:.9rem;font-weight:620;line-height:1.25;margin-bottom:4px}.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:38px}.stat{display:flex;flex-direction:column;padding:16px 18px;color:var(--ink);text-decoration:none;transition:transform .3s var(--spring),box-shadow .3s}.stat:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift),inset 0 1px 0 var(--glass-shine)}.stat svg{color:var(--accent);margin-bottom:8px}.stat strong{font:700 1.9rem/1.05 var(--display);letter-spacing:-.03em;font-variant-numeric:tabular-nums}.stat span{font-size:.84rem;color:var(--muted);line-height:1.3;margin-top:3px}.section-title{font:680 1.3rem/1.25 var(--display);letter-spacing:-.018em;color:var(--ink);margin-bottom:14px}.week-grid{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:14px}.week-grid li{display:flex}.week-tile{display:flex;flex-direction:column;flex:1;padding:18px 20px;color:var(--ink);text-decoration:none;transition:transform .3s var(--spring),box-shadow .3s}.week-tile:hover{transform:translateY(-3px) scale(1.008);box-shadow:var(--shadow-lift),inset 0 1px 0 var(--glass-shine)}.tile-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.tile-week{font-size:.82rem;font-weight:650;color:var(--accent)}.week-tile .ring-center small{margin:0;font-size:.72rem;font-weight:650;color:var(--ink)}.tile-title{font:660 1.13rem/1.26 var(--display);letter-spacing:-.014em;margin-bottom:7px}.tile-topics{color:var(--muted);font-size:.85rem;line-height:1.42;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden;margin-bottom:12px}.tile-meta{margin-top:auto;font-size:.78rem;color:var(--muted);font-weight:500;font-variant-numeric:tabular-nums}.week-tile.done{border-color:color-mix(in srgb,var(--ring-good-a) 45%,var(--glass-edge))}.page-foot{margin-top:40px;color:var(--muted);font-size:.86rem;max-width:640px}.crumbs{display:flex;gap:8px;font-size:.88rem;color:var(--muted);margin-bottom:14px}.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--accent)}.page-head{margin-bottom:26px;max-width:760px}.page-head h1{margin:6px 0 10px}.page-head .btn{margin:8px 8px 0 0}.page-head.compact{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.page-sub{color:var(--muted);font-size:1.05rem}.outcomes{margin-bottom:34px;max-width:760px}.outcomes ul{margin-top:2px}.outcomes .section-title,section>.section-title{margin-top:2px}section:has(>.path){margin-bottom:28px}ul.clean{list-style:none}ul.clean>li{position:relative;padding:3px 0 3px 18px}ul.clean>li:before{content:"";position:absolute;left:3px;top:.82em;width:5px;height:5px;border-radius:50%;background:var(--accent);opacity:.75}.path{list-style:none;padding:4px}.path a{display:flex;gap:14px;align-items:center;padding:13px 14px;border-radius:19px;color:var(--ink);text-decoration:none;transition:background .2s}.path a:hover{background:var(--field-hover)}.path li+li{border-top:1px solid var(--hairline)}.path-n{flex:none;display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--sunk);font-size:.85rem;font-weight:650;color:var(--muted);font-variant-numeric:tabular-nums}.path-n.part{background:var(--accent-soft);color:var(--accent)}.path-n.done{background:linear-gradient(135deg,var(--ring-good-a),var(--ring-good-b));color:#05251b}.path-main{flex:1;min-width:0}.path-title{display:block;font:640 1.06rem/1.28 var(--display);letter-spacing:-.01em}.path-sum{display:block;color:var(--muted);font-size:.89rem;line-height:1.42;margin-top:2px}.path-meta{flex:none;font-size:.8rem;font-weight:550;color:var(--muted);font-variant-numeric:tabular-nums}.topic{max-width:820px}.stepper{display:inline-flex;gap:3px;padding:4px;margin-bottom:18px;background:var(--sunk);border-radius:999px}.stepper a{display:flex;align-items:center;gap:8px;padding:7px 16px 7px 8px;color:var(--muted);text-decoration:none;font-weight:600;font-size:.93rem;border-radius:999px;transition:color .2s,background .2s}.stepper a:hover{color:var(--ink)}.stepper a.on{color:var(--ink);background:var(--field-hover);box-shadow:0 1px 4px #16203c2e,inset 0 1px 0 var(--glass-shine)}.step-n{display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--sunk);font-size:.74rem;font-weight:650}.step-n.done{background:linear-gradient(135deg,var(--ring-good-a),var(--ring-good-b));color:#05251b}.topic-body{display:flex;flex-direction:column;gap:26px;padding:28px}.lead-p{font-size:1.05rem}.next-row{margin-top:22px;display:flex;justify-content:flex-end}.next-row .btn{white-space:normal;text-align:left}.intro{color:var(--muted);margin-bottom:16px}.defs{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,320px),1fr));gap:10px;margin:0}.def{padding:16px 18px;background:var(--field);border:1px solid var(--hairline);border-radius:var(--r);transition:background .2s,transform .3s var(--spring)}.def:hover{background:var(--field-hover);transform:translateY(-1px)}.def dt{font:650 1.03rem/1.28 var(--display);letter-spacing:-.01em}.def dd{margin:6px 0 0;font-size:.95rem;line-height:1.55}.def dd.best{font-weight:600;color:var(--accent);font-size:.9rem;margin-top:3px}.def dd.eg{margin-top:10px;padding-top:10px;border-top:1px solid var(--hairline);color:var(--muted);font-size:.9rem}.def dd.eg span{display:block;font-size:.74rem;font-weight:600;margin-bottom:2px}.defs.compact .def{padding:13px 15px}.tag{display:inline-block;margin-left:8px;padding:1px 9px;border-radius:999px;background:var(--sunk);color:var(--muted);font-size:.74rem;font-weight:550;line-height:1.6;vertical-align:1px}.key{position:relative;padding:20px 22px;background:linear-gradient(135deg,color-mix(in srgb,var(--ring-a) 13%,transparent),color-mix(in srgb,var(--ring-b) 13%,transparent));border:1px solid color-mix(in srgb,var(--ring-a) 22%,transparent);border-radius:var(--r)}.key .eyebrow{color:var(--accent)}.key p{font:550 1.12rem/1.45 var(--display);letter-spacing:-.008em;margin-top:4px}.key strong{font-weight:720}.caution{padding:16px 20px;background:var(--warn-soft);border:1px solid color-mix(in srgb,var(--warn) 22%,transparent);border-radius:var(--r);font-size:.96rem}.caution h3{color:var(--warn);font-size:1.02rem;margin-bottom:6px}.caution ul{padding-left:18px}.caution li+li{margin-top:6px}blockquote{margin:0;padding:6px 0 6px 22px;border-left:3px solid;border-image:var(--grad) 1}blockquote p{font:italic 500 1.16rem/1.48 var(--display);letter-spacing:-.008em}blockquote footer{margin-top:6px;color:var(--muted);font-size:.87rem}.compare{display:grid;grid-template-columns:repeat(var(--cols),minmax(0,1fr));gap:10px}.compare>div{padding:16px 18px;background:var(--field);border:1px solid var(--hairline);border-radius:var(--r)}.compare h4{font-size:1.02rem;font-weight:660;margin-bottom:8px;color:var(--accent)}.compare li{font-size:.94rem;line-height:1.5}.stages{list-style:none}.stages>li{display:flex;gap:14px;padding-bottom:20px;position:relative}.stages>li:last-child{padding-bottom:0}.stages>li:not(:last-child):before{content:"";position:absolute;left:16px;top:38px;bottom:2px;width:2px;border-radius:2px;background:linear-gradient(var(--ring-a),var(--ring-b));opacity:.35}.stage-n{flex:none;display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--grad);color:#fff;font-size:.86rem;font-weight:680;box-shadow:inset 0 1px #fff6}.stages h3{margin:5px 0 6px}.stages li li{font-size:.96rem}.dots{margin:0;padding:20px;background:var(--field);border:1px solid var(--hairline);border-radius:var(--r)}.segmented{display:inline-flex;background:var(--sunk);border-radius:999px;padding:3px;margin-bottom:16px}.segmented button{min-height:38px;padding:6px 16px;border:0;border-radius:999px;background:none;color:var(--muted);font-weight:600;font-size:.9rem}.segmented button.on{background:var(--field-hover);color:var(--accent);box-shadow:0 1px 3px #16203c2e}.dots-body{display:flex;flex-wrap:wrap;align-items:center;gap:24px}.dots-grid{display:grid;grid-template-columns:repeat(10,16px);gap:5px}.dots-grid i{width:16px;height:16px;border-radius:50%;background:var(--sunk);transition:background .25s;transition-delay:calc((100 - var(--i)) * 4ms)}.dots-grid i.on{background:var(--accent)}.dots figcaption{flex:1 1 200px}.dots-value{display:block;font:700 3.8rem/1 var(--display);letter-spacing:-.04em;color:var(--accent)}.dots figcaption small{display:block;margin-top:8px;color:var(--muted)}.reflect{padding:18px 20px;background:var(--field);border:1px solid var(--hairline);border-radius:var(--r)}.reflect label{display:block;margin-bottom:10px}.reflect label>span+span{display:block;margin-top:4px}.reflect textarea,.search input{width:100%;padding:12px 14px;background:var(--field-hover);border:1px solid var(--hairline);border-radius:var(--r-sm);transition:box-shadow .2s,border-color .2s}.reflect textarea:focus,.search input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}.reflect textarea{resize:vertical}.watch h3{margin-bottom:8px}.watch-row{display:flex;gap:12px;align-items:flex-start;padding:8px 0}.watch-row small{display:block;color:var(--muted)}.tick{flex:none;width:28px;height:28px;margin:6px 0;display:grid;place-items:center;border-radius:50%;border:1.5px solid var(--hairline);background:var(--field);padding:0;transition:transform .3s var(--spring)}.tick.on{background:linear-gradient(135deg,var(--ring-good-a),var(--ring-good-b));border-color:transparent;color:#05251b;transform:scale(1.06)}.activity{background:var(--field);border:1px solid var(--hairline);border-radius:var(--r);transition:box-shadow .25s}.activity.open{background:var(--field);box-shadow:0 14px 30px -22px #16203c80}.activity-head{display:grid;grid-template-columns:minmax(0,1fr) auto auto;column-gap:12px;align-items:center;width:100%;min-height:60px;padding:13px 18px;background:none;border:0;border-radius:var(--r);text-align:left}.activity-kind{grid-column:1;font-size:.76rem;font-weight:600;color:var(--accent)}.activity-title{grid-column:1;font:640 1.08rem/1.28 var(--display);letter-spacing:-.01em}.activity-done{grid-column:2;grid-row:1 / 3;display:inline-flex;align-items:center;gap:4px;color:var(--good);font-size:.84rem;font-weight:650;font-variant-numeric:tabular-nums}.chev{grid-column:3;grid-row:1 / 3;color:var(--muted);transition:transform .35s var(--spring)}.activity.open .chev{transform:rotate(180deg)}.activity-body{padding:4px 18px 20px;border-top:1px solid var(--hairline);animation:fade-down .35s ease-out backwards}@keyframes fade-down{0%{opacity:0;transform:translateY(-6px)}}.activity-body .intro{margin-top:14px}.topic-body>.activity+.activity{margin-top:-12px}.counter{display:flex;flex-wrap:wrap;align-items:center;gap:2px;color:var(--muted);font-size:.84rem;font-weight:550;margin-bottom:8px;font-variant-numeric:tabular-nums}.in-a-row{display:inline-flex;align-items:center;gap:4px;margin-left:auto;padding:2px 10px 2px 8px;border-radius:999px;font-size:.78rem;font-weight:650;color:#6b3a00;background:linear-gradient(135deg,#ffd98a,#ffb26b);animation:pop .45s var(--spring) backwards}.prompt{font:620 1.2rem/1.38 var(--display);letter-spacing:-.012em;margin-bottom:16px}.options{display:flex;flex-direction:column;gap:8px;margin-bottom:14px}.option{position:relative;display:flex;align-items:flex-start;gap:10px;width:100%;min-height:50px;padding:12px 15px;background:var(--field);border:1.5px solid var(--hairline);border-radius:var(--r);text-align:left;transition:transform .25s var(--spring),background .18s,border-color .18s,opacity .25s}.option kbd{flex:none;width:23px;height:23px;margin-top:1px;display:grid;place-items:center;background:var(--sunk);border-radius:7px;font:600 .74rem var(--sans);color:var(--muted)}.option-text{flex:1;min-width:0}.option-mark{flex:none;margin-top:2px;animation:pop .45s var(--spring) backwards}.right .option-mark{color:var(--good)}.wrong .option-mark{color:var(--bad)}.option:hover:not(:disabled),.bucket:hover:not(:disabled){border-color:var(--accent);background:var(--field-hover);transform:translateY(-1px)}.option:active:not(:disabled),.bucket:active:not(:disabled){transform:scale(.985)}.right{border-color:var(--good)!important;background:var(--good-soft)!important;color:inherit}.option.right,.bucket.right{animation:correct .55s var(--spring)}.wrong{border-color:var(--bad)!important;background:var(--bad-soft)!important}.option.wrong,.bucket.wrong{animation:nudge .42s ease}.dim{opacity:.58}@keyframes pop{0%{opacity:0;transform:scale(.3)}}@keyframes correct{0%{box-shadow:0 0 color-mix(in srgb,var(--ring-good-a) 55%,transparent);transform:scale(1)}35%{transform:scale(1.018)}to{box-shadow:0 0 0 16px transparent;transform:scale(1)}}@keyframes nudge{20%{transform:translate(-5px)}45%{transform:translate(4px)}70%{transform:translate(-2px)}}.buckets{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,200px),1fr));gap:8px;margin-top:16px}.buckets.wide{grid-template-columns:1fr}.bucket{min-height:50px;padding:10px 14px;background:var(--field);border:1.5px solid var(--hairline);border-radius:var(--r);font-weight:550;font-size:.94rem;line-height:1.3;text-align:left;transition:transform .25s var(--spring),background .18s,border-color .18s,opacity .25s}.feedback{display:flex;gap:10px;padding:13px 15px;border-radius:var(--r);margin-bottom:12px;font-size:.96rem;animation:fade-down .35s ease-out backwards}.feedback-icon{flex:none;margin-top:2px}.feedback.good{background:var(--good-soft)}.feedback.bad{background:var(--bad-soft)}.feedback.good strong,.feedback.good .feedback-icon{color:var(--good)}.feedback.bad strong,.feedback.bad .feedback-icon{color:var(--bad)}.option-note{padding:7px 15px 0;font-size:.92rem;animation:fade-down .3s ease-out backwards}.option-note.good{color:var(--good)}.option-note.bad{color:var(--bad)}.score-card{display:flex;align-items:center;gap:22px;padding:20px 22px;margin-bottom:18px;background:var(--field);border:1px solid var(--hairline);border-radius:var(--r-lg);animation:rise .6s var(--spring) backwards}.score-card.perfect{background:linear-gradient(120deg,color-mix(in srgb,var(--ring-good-a) 16%,transparent),color-mix(in srgb,#f5c451 18%,transparent));border-color:color-mix(in srgb,var(--ring-good-a) 35%,transparent)}.score-grade{font:720 1.6rem/1.15 var(--display);letter-spacing:-.024em;margin:2px 0 5px}.score-line{color:var(--muted);font-size:.95rem;line-height:1.45}.result-score{font:600 1.05rem/1.3 var(--display);margin-bottom:14px}.result-score strong{font-size:2.2rem;letter-spacing:-.03em;color:var(--accent)}.result h3{margin-top:8px}.missed{list-style:none;margin-bottom:16px}.missed li{padding:12px 0;border-top:1px solid var(--hairline);font-size:.96rem}.missed .answer{color:var(--good);font-weight:650;margin-top:4px}.missed .why{color:var(--muted);margin-top:2px}.result .key{margin-bottom:16px}.confetti{position:fixed;top:0;right:0;bottom:0;left:0;width:100vw;height:100vh;z-index:90;pointer-events:none}.order{display:flex;flex-direction:column;gap:18px}.order h4{margin-bottom:8px;color:var(--muted);font-weight:600;font-size:.9rem}.pool{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,240px),1fr));gap:8px}.sequence{list-style:none;display:flex;flex-direction:column;gap:6px}.sequence li{display:flex;align-items:center;gap:10px;padding:7px 8px 7px 14px;background:var(--field);border:1.5px solid var(--hairline);border-radius:var(--r);animation:rise .4s var(--spring) backwards}.seq-n{flex:none;font-size:.84rem;font-weight:680;color:var(--accent);width:20px;font-variant-numeric:tabular-nums}.seq-text{flex:1;font-size:.96rem;line-height:1.35}.seq-tools{flex:none;display:flex}.seq-tools button{display:grid;place-items:center;width:34px;height:38px;background:none;border:0;color:var(--muted);border-radius:10px}.seq-tools button:hover:not(:disabled){background:var(--sunk);color:var(--ink)}.seq-tools button:disabled{opacity:.3}.case{display:grid;gap:20px}.paper{padding:18px 20px;background:var(--field-hover);border:1px solid var(--hairline);border-radius:var(--r);box-shadow:inset 0 3px 0 var(--accent)}.paper h4{font:660 1.1rem/1.3 var(--display);margin:6px 0 12px}.paper dl{margin:0}.paper dl div{padding:8px 0;border-top:1px solid var(--hairline);font-size:.93rem}.paper dt{font-size:.76rem;font-weight:600;color:var(--muted)}.paper dd{margin:2px 0 0}.settings{display:flex;flex-direction:column;gap:20px;align-items:flex-start}.settings .btn{max-width:100%}fieldset{border:0;padding:0;margin:0}legend{padding:0;margin-bottom:8px;font-size:.86rem;font-weight:620;color:var(--muted)}.chips{display:flex;flex-wrap:wrap;gap:7px}.chip{min-height:42px;padding:7px 15px;background:var(--field);border:1px solid var(--hairline);border-radius:999px;font-weight:550;font-size:.92rem;transition:background .2s,color .2s,transform .25s var(--spring),border-color .2s}.chip:hover{transform:translateY(-1px);background:var(--field-hover)}.chip.on{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}.flash{perspective:1600px}.flashcard{display:block;width:100%;padding:0;background:none;border:0;box-shadow:none;text-align:center;animation:rise .5s var(--spring) backwards}.flash-inner{display:grid;transform-style:preserve-3d;transition:transform .7s var(--spring)}.flashcard.flipped .flash-inner{transform:rotateY(180deg)}.flash-face{grid-area:1 / 1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;min-height:320px;padding:30px 26px;background:var(--glass);border:1px solid var(--glass-edge);border-radius:var(--r-lg);box-shadow:var(--shadow-lift),inset 0 1px 0 var(--glass-shine);backface-visibility:hidden;-webkit-backface-visibility:hidden}.flash-answer{transform:rotateY(180deg);background:linear-gradient(150deg,color-mix(in srgb,var(--ring-a) 12%,var(--glass)),color-mix(in srgb,var(--ring-b) 14%,var(--glass)))}.flash-front{font:700 clamp(1.7rem,1.3rem + 2vw,2.3rem)/1.16 var(--display);letter-spacing:-.024em}.flash-back{font:550 1.2rem/1.48 var(--display);letter-spacing:-.008em;max-width:560px}.flash-face small{color:var(--muted)}.flash-cite{text-align:center;margin:12px 0}.ratings{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;animation:fade-down .35s ease-out backwards}.ratings .bucket{text-align:center}.ratings small{display:block;font-weight:400;color:var(--muted);font-size:.78rem}.search{display:block;margin-bottom:10px}.search input{min-height:50px;border-radius:999px;padding-inline:20px;background:var(--glass);box-shadow:var(--shadow)}.terms-group{margin-top:18px}.terms-group .section-title{font-size:1.04rem;margin-bottom:8px}.terms{margin:0 0 20px;padding:4px 20px;background:var(--glass);border:1px solid var(--glass-edge);border-radius:var(--r-lg);box-shadow:var(--shadow),inset 0 1px 0 var(--glass-shine)}.terms div{padding:13px 0}.terms div+div{border-top:1px solid var(--hairline)}.terms dt{font:640 1.03rem/1.3 var(--display);letter-spacing:-.01em}.terms dd{margin:3px 0 0;font-size:.95rem}.medal{position:relative;display:inline-grid;place-items:center;flex:none;overflow:hidden;border-radius:50%;color:var(--medal-ink);background:conic-gradient(from 215deg,var(--m1),var(--m2),var(--m1),var(--m2),var(--m1));box-shadow:0 8px 18px -8px var(--medal-shadow),inset 0 1px 1px #ffffffa6}.medal:before{content:"";position:absolute;top:11%;right:11%;bottom:11%;left:11%;border-radius:50%;background:linear-gradient(155deg,var(--m2),var(--m1));box-shadow:inset 0 1px 1px #ffffff8c,inset 0 -2px 3px #00000024}.medal:after{content:"";position:absolute;top:-30%;bottom:-30%;left:-70%;width:45%;background:linear-gradient(90deg,transparent,rgb(255 255 255 / .75),transparent);transform:rotate(18deg);animation:glint 5.5s ease-in-out infinite}.medal svg{position:relative;z-index:1}@keyframes glint{0%,62%{left:-70%}86%,to{left:125%}}.medal.xs{width:34px;height:34px}.medal.sm{width:50px;height:50px}.medal.md{width:64px;height:64px}.medal.xl{width:132px;height:132px}.medal.bronze{--m1: #a8683a;--m2: #eabb8f;--medal-ink: #4a2710;--medal-shadow: rgb(150 90 40 / .8)}.medal.silver{--m1: #8b97aa;--m2: #edf1f7;--medal-ink: #333d4d;--medal-shadow: rgb(90 105 130 / .8)}.medal.gold{--m1: #c9921b;--m2: #ffe493;--medal-ink: #5a3d00;--medal-shadow: rgb(200 145 20 / .85)}.medal.platinum{--m1: #6d7dff;--m2: #d9e2ff;--medal-ink: #252a78;--medal-shadow: rgb(90 100 240 / .85)}.medal.topic{--m1: #12b76a;--m2: #9df0c7;--medal-ink: #06331f;--medal-shadow: rgb(18 160 100 / .75)}.medal.locked{--m1: #a4abb8;--m2: #d5dae3;--medal-ink: #5c6473;--medal-shadow: transparent;opacity:.62}.medal.locked:after{display:none}:root[data-theme=dark] .medal.locked{--m1: #464d5c;--m2: #5f6778;--medal-ink: #c3c9d4}.award-group{margin-bottom:30px}.awards{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:12px}.award{display:flex;gap:14px;align-items:center;padding:16px;border-radius:20px}.award:not(.earned){background:var(--field);box-shadow:none}.award h3{font-size:1.02rem;margin:0 0 2px}.award p{color:var(--muted);font-size:.88rem;line-height:1.38}.award-text{flex:1;min-width:0}.award-date{display:block;margin-top:4px;color:var(--good);font-size:.78rem;font-weight:600}.award-progress{display:flex;align-items:center;gap:8px;margin-top:7px}.award-progress .meter{flex:1}.award-progress small{flex:none;font-size:.76rem;color:var(--muted);font-variant-numeric:tabular-nums}.toast-dock{position:fixed;top:74px;left:0;right:0;z-index:70;display:flex;justify-content:center;padding:0 16px;pointer-events:none}.toast{pointer-events:auto;display:flex;align-items:center;gap:13px;max-width:440px;padding:10px 24px 10px 11px;border-radius:999px;text-align:left;animation:island .7s var(--spring) backwards}.toast-text{display:flex;flex-direction:column;min-width:0;line-height:1.25}.toast-text small{font-size:.73rem;font-weight:600;color:var(--accent)}.toast-text strong{font:680 1.02rem/1.25 var(--display);letter-spacing:-.012em}.toast-text span{font-size:.84rem;color:var(--muted)}.toast .medal{animation:medal-in .9s var(--spring) .15s backwards}@keyframes island{0%{opacity:0;transform:translateY(-34px) scale(.72)}}@keyframes medal-in{0%{transform:scale(.2) rotate(-110deg)}}.moment-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:80;display:grid;place-items:center;padding:16px;background:#080c1c80;-webkit-backdrop-filter:blur(14px) saturate(140%);backdrop-filter:blur(14px) saturate(140%);animation:page-in .4s ease-out backwards}.moment{position:relative;z-index:1;width:min(460px,100%);padding:34px 28px 28px;border-radius:32px;text-align:center;background:var(--glass-solid);animation:moment-in .75s var(--spring) backwards}@keyframes moment-in{0%{opacity:0;transform:translateY(28px) scale(.86)}}.moment-medal{position:relative;display:grid;place-items:center;height:160px;margin-bottom:14px}.moment-medal .medal{animation:medal-in 1.1s var(--spring) .2s backwards}.moment-rays{position:absolute;width:300px;height:300px;left:50%;top:50%;margin:-150px 0 0 -150px;border-radius:50%;background:repeating-conic-gradient(from 0deg,rgb(255 215 120 / .34) 0deg 10deg,transparent 10deg 30deg);-webkit-mask:radial-gradient(closest-side,#000 25%,transparent);mask:radial-gradient(closest-side,#000 25%,transparent);animation:spin 26s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.moment h2{font-size:1.9rem;font-weight:720;letter-spacing:-.028em;margin:4px 0 8px}.moment p{color:var(--muted);margin-bottom:22px}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;display:grid;place-items:center;padding:16px;background:#080c1c73;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);animation:page-in .25s ease-out backwards}.modal{display:flex;flex-direction:column;width:min(1000px,100%);height:min(760px,100%);border-radius:var(--r-lg);overflow:hidden;animation:moment-in .5s var(--spring) backwards}.modal header{display:flex;align-items:center;gap:10px;padding:8px 10px 8px 20px;border-bottom:1px solid var(--hairline)}.modal header div{flex:1;min-width:0}.modal header strong,.modal header span{display:block;line-height:1.3}.modal header span{font-size:.86rem;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.modal iframe{flex:1;width:100%;border:0;background:var(--sunk)}@media(min-width:940px){.topic:has(.case){max-width:1040px}.case{grid-template-columns:320px minmax(0,1fr);align-items:start}.paper{position:sticky;top:88px}}@media(max-width:860px){.bento{grid-template-columns:1fr}.progress-card{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;gap:16px}.progress-card .ring{width:104px!important;height:104px!important}.progress-card .ring svg{width:104px;height:104px}.progress-card .ring-center strong{font-size:1.55rem}.progress-note{flex:1 1 120px}.next-award{flex:1 1 100%}.stats{grid-template-columns:repeat(2,minmax(0,1fr))}.masthead nav a span{display:none}.masthead nav a{padding:10px}}@media(max-width:720px){body{font-size:16px}.masthead{padding:8px 12px 0}.masthead-inner{padding:3px 4px 3px 14px}.masthead nav{position:fixed;left:12px;right:12px;bottom:calc(10px + env(safe-area-inset-bottom));z-index:30;justify-content:space-around;gap:0;padding:5px;background:var(--glass-float);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);border:1px solid var(--glass-edge);border-radius:26px;box-shadow:var(--shadow-lift),inset 0 1px 0 var(--glass-shine)}.masthead nav a{flex:1;flex-direction:column;gap:2px;padding:6px 2px;font-size:.68rem;justify-content:center;border-radius:20px}.masthead nav a span{display:inline}.page{padding:18px 12px 112px}.hero-card{padding:24px 20px 22px}.topic-body,.panel{padding:18px 16px}.stepper{display:flex}.stepper a{flex:1;justify-content:center;padding-inline:6px 10px}.compare{grid-template-columns:1fr}.path-sum{font-size:.88rem}.next-row{justify-content:stretch}.next-row .btn{width:100%}.dots-grid{grid-template-columns:repeat(10,13px);gap:4px}.dots-grid i{width:13px;height:13px}.dots-value{font-size:3.2rem}.sequence li{gap:6px;padding-left:10px}.seq-n{width:16px}.seq-text{font-size:.92rem}.seq-tools button{width:30px}.buckets{grid-template-columns:repeat(2,minmax(0,1fr))}.buckets.wide{grid-template-columns:1fr}.option kbd{display:none}.score-card{flex-direction:column;text-align:center;gap:12px}.toast-dock{top:66px}.toast{border-radius:26px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}