:root{color-scheme:light;--bg:#f8f7f4;--surface:#fff;--surface-2:#efede8;--line:#dedbd5;--line-bright:#b5afa4;--text:#262522;--text-2:#45423c;--muted:#6c665c;--blue:var(--muted);--blue-dim:#f0ece4;--accent:#a12c32;--accent-soft:#dbb763;--accent-deep:#7f1f26;--on-accent:#fff;--gold-text:#85621d;--gold-shine:var(--accent-soft);--right:#356548;--right-line:#abc5b5;--right-bg:#eaf2ed;--wrong:#a12c32;--wrong-line:#d9a9ab;--wrong-bg:#faecec;--heat-1:#eee3c5;--heat-2:#e0c98f;--heat-3:#b48e38;--shadow-card:0 12px 40px -24px #46372640;--gap-block:clamp(2.5rem, 5vh, 3.5rem);--page-gutter:clamp(1.25rem, 3vw, 4rem);--sans:"DM Sans", "Segoe UI", sans-serif;--serif:"DM Serif Display", Georgia, serif;--mono:ui-monospace, "Cascadia Mono", monospace;--ease-out-expo:cubic-bezier(.23, 1, .32, 1);--dur-hover:.18s}html[data-theme=dark]{color-scheme:dark;--bg:#191817;--surface:#22211f;--surface-2:#2e2b27;--line:#3e3933;--line-bright:#756b5e;--text:#f5f0e7;--text-2:#d6cdc0;--muted:#b2a89a;--blue-dim:#2e2925;--accent:#ef9292;--accent-deep:#f1b0aa;--on-accent:#261717;--gold-text:#dfbb62;--right:#98c5a8;--right-line:#41604b;--right-bg:#233129;--wrong:#ef9292;--wrong-line:#7d4949;--wrong-bg:#392327;--heat-1:#453a26;--heat-2:#746139;--heat-3:#ad8840;--shadow-card:0 12px 40px -24px #00000080}*,:before,:after{box-sizing:border-box}html,body{width:100%;min-height:100%;margin:0}html{scroll-behavior:smooth;scroll-padding-top:2rem}body{background:var(--bg);color:var(--text);font-family:var(--sans);-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button,a,select{touch-action:manipulation;-webkit-tap-highlight-color:transparent}button{cursor:pointer}[hidden]{display:none!important}h1,h2,h3{text-wrap:balance}p{text-wrap:pretty}a{text-underline-offset:4px}:focus-visible{outline:2px solid var(--accent);outline-offset:5px}main:focus{outline:none}.skip-link{z-index:3;background:var(--surface);color:var(--accent);border-radius:.5rem;padding:.8rem 1.2rem;position:fixed;top:-5rem;left:1rem}.skip-link:focus{top:1rem}.site-header{width:100%;padding:1.3rem var(--page-gutter);border-bottom:1px solid var(--line);align-items:center;gap:2rem;display:flex}.site-brand{color:var(--text);flex-shrink:0;align-items:center;gap:.8rem;min-height:44px;text-decoration:none;display:inline-flex}.site-mark{color:#fff4e6;letter-spacing:-.04em;background:#962a32;border-radius:.4rem;justify-content:center;align-items:center;width:2.6rem;height:2.6rem;padding-right:.08em;font-size:.95rem;font-weight:600;display:flex}.site-mark span{color:#dfbb62}.site-wordmark{letter-spacing:-.025em;font-size:.95rem;font-weight:700}.site-main-nav{gap:1.8rem;margin-left:2rem;display:flex}.site-main-nav a{min-height:44px;color:var(--muted);align-items:center;font-size:.85rem;font-weight:500;text-decoration:none;transition:color .16s ease-out;display:inline-flex}.site-main-nav a:hover,.site-main-nav a[aria-current]{color:var(--accent)}.site-actions{align-items:center;gap:1.1rem;margin-left:auto;display:flex}.site-nav{align-items:center;gap:1rem;display:flex}.site-nav-link,.site-nav-button{overflow-wrap:anywhere;max-width:10rem;min-height:44px;color:var(--text-2);background:0 0;border:0;align-items:center;padding:.35rem .1rem;font-size:.85rem;text-decoration:none;display:inline-flex}.site-nav-link:hover,.site-nav-button:hover{color:var(--accent)}.site-nav-muted{color:var(--muted);font-size:.8rem}.site-theme{border:1px solid var(--line);width:44px;height:44px;color:var(--text-2);background:0 0;border-radius:50%;justify-content:center;align-items:center;transition:background-color .16s ease-out,transform .16s ease-out;display:inline-flex}.site-theme:hover{background:var(--surface-2)}.site-theme:active{transform:scale(.96)}.site-theme .icon-sun,html[data-theme=dark] .site-theme .icon-moon{display:none}html[data-theme=dark] .site-theme .icon-sun{display:block}@media (width<=46rem){.site-header{flex-wrap:wrap;gap:.5rem;padding:1rem 1.25rem}.site-actions{gap:.7rem}.site-main-nav{order:3;justify-content:space-between;gap:1rem;width:100%;margin:.4rem 0 -.5rem}.site-main-nav a{font-size:.83rem}}@media (width<=23rem){.site-wordmark{display:none}}.page{width:100%;min-height:calc(100dvh - 14rem);padding:clamp(3rem, 8vh, 5rem) var(--page-gutter) 5.5rem;gap:var(--gap-block);flex-direction:column;display:flex}.page--wide{width:100%}.sort-bar{flex-wrap:wrap;gap:.4rem;display:flex}.sort-chip{border:1px solid var(--line);background:var(--surface);min-height:44px;color:var(--muted);border-radius:8px;padding:.65rem .9rem;font-size:.82rem;text-decoration:none}.sort-chip:hover{color:var(--text);border-color:var(--line-bright)}.sort-chip.is-active{border-color:var(--accent);color:var(--accent)}.table-scroll{border:1px solid var(--line);background:var(--surface);border-radius:8px;overflow-x:auto}.card-table{border-collapse:collapse;width:100%;font-size:.88rem}.card-table th,.card-table td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);padding:.65rem .85rem}.card-table thead th{background:var(--surface-2);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);white-space:nowrap;font-size:.72rem;font-weight:600;position:sticky;top:0}.card-table tbody tr:last-child th,.card-table tbody tr:last-child td{border-bottom:0}.card-table tbody tr:hover{background:var(--surface-2)}.card-table .num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}.card-table .quiet{color:var(--muted)}.card-cell{max-width:24rem;font-weight:400}.card-prompt{font-family:var(--serif);color:var(--text);font-size:1rem;display:block}.card-answer{-webkit-line-clamp:2;color:var(--muted);-webkit-box-orient:vertical;margin-top:.2rem;font-size:.8rem;line-height:1.45;display:-webkit-box;overflow:hidden}.pill{border:1px solid var(--line-bright);white-space:nowrap;border-radius:8px;padding:.12rem .5rem;font-size:.72rem;display:inline-block}.pill.is-shaky{border-color:var(--wrong-line);color:var(--wrong)}.pill.is-new{border-color:var(--line-bright);color:var(--muted)}.pill.is-learning{border-color:var(--accent-deep);color:var(--accent)}.pill.is-mastered{border-color:var(--right-line);color:var(--right)}.strength{background:var(--line);border-radius:8px;width:5rem;height:6px;display:block;overflow:hidden}.strength-fill{background:linear-gradient(90deg, var(--wrong), var(--accent), var(--right));background-size:5rem 100%;border-radius:8px;height:100%;display:block}.eyebrow{font-family:var(--sans);color:var(--gold-text);margin:0 0 .85rem;font-size:.85rem}.page-title{font-family:var(--sans);letter-spacing:-.06em;margin:0;font-size:clamp(2.4rem,7vw,4rem);font-weight:600;line-height:1.06}.eyebrow a{color:inherit;text-decoration:none}.eyebrow a:hover{text-decoration:underline}.page-lede{max-width:38rem;color:var(--muted);margin:1.15rem 0 0;font-size:1.125rem;line-height:1.65}.hero-note{color:var(--muted);margin:0;font-size:.85rem;line-height:1.6}.link-list{flex-direction:column;gap:1rem;display:flex}.link-card{border:1px solid var(--line);background:var(--surface);color:inherit;border-radius:12px;align-items:center;gap:1.25rem;padding:1.4rem 1.5rem;text-decoration:none;transition:background .15s,border-color .15s,transform .15s;display:flex}.link-card:hover{background:var(--surface-2);border-color:var(--line-bright)}.link-card:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.link-card-body{flex:1;min-width:0}.link-card-title{font-family:var(--sans);letter-spacing:-.035em;margin:0;font-size:1.15rem;font-weight:600}.link-card-note{color:var(--muted);margin:.45rem 0 0;font-size:.95rem;line-height:1.6}.link-card-tag{border:1px solid var(--line-bright);letter-spacing:.06em;text-transform:uppercase;color:var(--muted);border-radius:8px;margin:.6rem 0 0;padding:.15rem .55rem;font-size:.72rem;display:inline-block}.link-card-arrow{color:var(--muted);flex:none;font-size:1.15rem;transition:transform .15s,color .15s}.link-card:hover .link-card-arrow{color:var(--accent)}.note-group+.note-group{margin-top:2.25rem}.section-lede{margin-bottom:2.25rem}.note-group-title{color:var(--muted);margin:0 0 .9rem;font-size:.9rem;font-weight:500}.page--narrow{padding-top:3.5rem}.page--narrow>*{width:100%;max-width:30rem;margin-inline:auto}.form{flex-direction:column;gap:1rem;display:flex}.field{flex-direction:column;gap:.4rem;display:flex}.field-label{color:var(--text-2);font-size:.85rem;font-weight:500}.field-input{border:1px solid var(--line);background:var(--surface);color:var(--text);font:inherit;border-radius:8px;padding:.85rem 1rem;font-size:1rem}.field-input:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:#0000}.field-hint{color:var(--muted);font-size:.78rem;line-height:1.45}.form-alt{color:var(--muted);margin:0;font-size:.88rem}.form-alt a{color:var(--accent);border-bottom:1px solid #0000;text-decoration:none}.form-alt a:hover{border-bottom-color:var(--accent)}.form-submit{border:1px solid var(--accent);background:var(--accent);color:var(--on-accent);font:inherit;cursor:pointer;border-radius:8px;margin-top:.35rem;padding:.75rem 1.2rem;font-size:.95rem;transition:background-color .16s ease-out,transform .16s ease-out}.form-submit:hover{background:var(--accent-deep);color:var(--on-accent)}.form-submit:active{transform:scale(.98)}.form-submit:disabled,.field-input:disabled{opacity:.4;cursor:not-allowed}.form-submit:disabled:hover{color:var(--accent);background:0 0}.form-error,.form-ok{border:1px solid;border-radius:8px;margin:0;padding:.75rem 1rem;font-size:.9rem;line-height:1.5}.form-error{border-color:var(--wrong-line);background:var(--wrong-bg);color:var(--wrong)}.form-ok{border-color:var(--right-line);background:var(--right-bg);color:var(--right)}.section-title{font-family:var(--sans);letter-spacing:-.04em;margin:0 0 1.35rem;font-size:clamp(1.5rem,3.2vw,2.1rem);font-weight:500}.stat-grid{grid-template-columns:repeat(auto-fit,minmax(9rem,1fr));gap:1rem;display:grid}.stat{border:1px solid var(--line);background:var(--surface);border-radius:8px;flex-direction:column;gap:.45rem;padding:1.35rem 1.5rem;display:flex}.stat-value{font-family:var(--serif);letter-spacing:-.02em;color:var(--accent);font-variant-numeric:tabular-nums;font-size:clamp(1.9rem,4vw,2.4rem);line-height:1}.stat-of{color:var(--muted);font-size:.95rem}.stat-label{color:var(--muted);font-size:.8rem}.weak-list{flex-direction:column;gap:.4rem;margin:0;padding:0;list-style:none;display:flex}.weak-row{border:1px solid var(--line);background:var(--surface);border-radius:8px;justify-content:space-between;align-items:baseline;gap:1rem;padding:.7rem 1rem;display:flex}.weak-term{font-family:var(--serif);font-size:1rem}.weak-count{color:var(--muted);font-variant-numeric:tabular-nums;flex:none;font-size:.82rem}.weak-deck{font-family:var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-top:.15rem;font-size:.72rem;display:block}.heatmap{grid-template-rows:repeat(7,1fr);grid-auto-columns:1fr;grid-auto-flow:column;gap:3px;max-width:40rem;display:grid}.heat{aspect-ratio:1;background:var(--surface-2);border-radius:8px}.heat--1{background:var(--heat-1)}.heat--2{background:var(--heat-2)}.heat--3{background:var(--heat-3)}.heat--4{background:var(--accent)}.form--narrow{max-width:30rem}.profile{border:1px solid var(--line);background:var(--line);border-radius:8px;flex-direction:column;gap:1px;margin:0;display:flex;overflow:hidden}.profile-row{background:var(--surface);flex-wrap:wrap;align-items:baseline;gap:.35rem 1.5rem;padding:1.1rem 1.5rem;display:flex}.profile-label{letter-spacing:.06em;text-transform:uppercase;width:8rem;color:var(--muted);flex:none;font-size:.78rem}.profile-value{flex-wrap:wrap;flex:1;align-items:center;gap:.6rem;min-width:0;margin:0;font-size:1rem;display:flex}.profile-email{word-break:break-all}.profile-none{color:var(--muted);font-size:.92rem;line-height:1.55}@media (width<=34rem){.profile-label{width:100%}}.section-head{border-top:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:.5rem 1.5rem;margin-bottom:1.6rem;padding-top:1.6rem;display:flex}.section-head .eyebrow,.section-head .section-title,.section-head .hero-note{margin:0}.section-head-titles{flex-direction:column;gap:.6rem;display:flex}.site-footer{width:100%;padding:1.5rem var(--page-gutter) 2.5rem;border-top:1px solid var(--line);color:var(--muted);flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:.75rem 2rem;font-size:.82rem;display:flex}.site-footer p{align-items:center;gap:.65rem;margin:0;display:flex}.site-footer nav{flex-wrap:wrap;gap:1.25rem;display:flex}.site-footer a{min-height:44px;color:var(--muted);border-bottom:1px solid #0000;align-items:center;gap:.4rem;text-decoration:none;transition:color .15s,border-color .15s;display:inline-flex}.site-footer a:hover{color:var(--text);border-bottom-color:var(--line-bright)}.back-link{color:var(--muted);border-bottom:1px solid #0000;align-self:flex-start;align-items:center;min-height:44px;margin-top:auto;font-size:.85rem;text-decoration:none;transition:color .15s,border-color .15s;display:inline-flex}.back-link:hover{color:var(--text);border-bottom-color:var(--line-bright)}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.site-theme,.form-submit,.link-card,.link-card-arrow,.form-submit{transition:none}.link-card:hover{transform:none}}::view-transition-old(root),::view-transition-new(root){animation-duration:.24s;animation-timing-function:ease-in-out}html.theme-changing :where(body,.project,.subject-symbol,.link-card,.fc-face,.site-header,.site-footer){transition:background-color .24s ease-out,border-color .24s ease-out,color .24s ease-out}@media (prefers-reduced-motion:reduce){::view-transition-old(root),::view-transition-new(root){animation:none}}.study-shell{flex-direction:column;height:100dvh;min-height:0;display:flex}.study-shell .site-header{flex:none;padding-block:.65rem}@media (width<=46rem){.study-shell .site-main-nav{display:none}}