body.app-mode .landing-only{display:none!important}body:not(.app-mode) #app:empty{display:none}body.app-mode .landing-link,body.study-mode .site-head,body.study-mode .site-foot{display:none}body.app-mode .site-foot{margin-top:48px}.page-pad{padding-block:40px 72px}.narrow{max-width:640px}.loading{display:flex;align-items:center;gap:12px;color:var(--muted);padding:32px 0}.small{font-size:14px}.pad{padding:20px}.center{text-align:center}.brand-app{color:var(--muted);font-weight:500}.brand-sep{color:var(--line-strong);font-weight:300}.nav-cta{background:var(--ink-solid);color:#fff!important}.nav-cta:hover{background:#2a2c31!important}@media (max-width: 420px){.brand-word{display:none}}.app-hero{padding:40px 0 64px;background:linear-gradient(180deg,#faf6ee,#fdfdfc);border-bottom:1px solid #f0ebe1}.app-hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 460px;grid-template-areas:"text create" "more create";column-gap:56px;align-items:center}.hero-text{grid-area:text;align-self:end}.hero-more{grid-area:more;align-self:start}#create{grid-area:create;min-width:0}.app-hero h1{margin-top:14px}.app-hero .lede{margin-top:18px}.hero-points{list-style:none;padding:0;margin-top:24px;display:grid;gap:10px;font-size:15.5px;color:#3c4048}.hero-points li{display:flex;gap:10px;align-items:baseline}.hero-points li:before{content:"";flex:0 0 8px;height:8px;border-radius:50%;background:var(--cobalt);transform:translateY(-2px)}.hero-art{width:210px;height:auto;margin-bottom:-6px}.hero-art,.done-art,.empty-art{filter:brightness(1.02)}@media (max-width: 900px){.app-hero-grid{grid-template-columns:minmax(0,1fr);grid-template-areas:"text" "create" "more";row-gap:22px}.app-hero{padding-top:16px}.hero-art{width:150px}.app-hero .lede{margin-top:0}}.quick{display:grid;gap:14px;padding:20px}.quick-paste{min-height:132px;font-size:15px}.quick-preview{display:grid;gap:10px}.select-inline{display:inline-block;width:auto;max-width:100%;min-height:34px;padding:4px 26px 4px 8px;border:1px solid var(--line-strong);border-radius:8px;background:#fff;font:600 14px var(--sans)}.mini-cards{list-style:none;padding:0;display:grid;border:1px solid var(--line);border-radius:12px;overflow:hidden}.mini-cards li{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);gap:12px;padding:8px 12px;font-size:14px}.mini-cards li+li{border-top:1px solid var(--line)}.mini-cards li span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mini-cards li span:first-child{font-weight:600}.quick-actions{display:grid;gap:6px}.quick-actions .btn-lg{width:100%}.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;margin-top:28px;padding:0;counter-reset:step}.steps li{list-style:none;counter-increment:step}.steps li:before{content:counter(step);display:grid;place-items:center;width:34px;height:34px;margin-bottom:14px;border-radius:50%;background:var(--ink-solid);color:#fff;font:650 15px var(--sans)}.steps h3,.features h3{font:600 18px/1.3 var(--sans)}.steps p,.features p{margin-top:8px;color:#4a4e56}.features{list-style:none;padding:0;margin-top:26px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.features li{padding:20px;border:1px solid var(--line);border-radius:16px;background:#fff}@media (max-width: 860px){.steps,.features{grid-template-columns:minmax(0,1fr)}}.api-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:40px;align-items:start}.api-grid .code{font-size:12.5px}@media (max-width: 900px){.api-grid{grid-template-columns:minmax(0,1fr)}}.more-apps{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;list-style:none;padding:0;margin-top:22px}.more-apps a{display:grid;gap:4px;padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--ink)}.more-apps a:hover{border-color:var(--line-strong);box-shadow:var(--shadow);color:var(--ink)}.more-apps strong{font:400 22px/1.1 var(--serif)}.more-apps span{color:var(--muted);font-size:14px}.compare td:first-child{font-weight:600}.compare{min-width:680px}.compare td.muted{color:var(--faint)}.mine{padding-block:36px 8px}.tiles{list-style:none;padding:0;margin-top:18px;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}.tile{display:grid;gap:6px;padding:16px 18px;border:1px solid var(--line);border-bottom-width:3px;border-radius:14px;background:#fff;color:var(--ink);min-width:0}.tile:hover{border-color:var(--line-strong);color:var(--ink)}.tile-title{font:400 21px/1.2 var(--serif);letter-spacing:-.01em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.tile-meta{font-size:13.5px;color:var(--muted)}.bar{display:block;height:5px;border-radius:99px;background:var(--panel);overflow:hidden}.bar span{display:block;height:100%;background:var(--sage);border-radius:99px}.library .tiles{margin-top:24px}.library-side{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px;margin-top:32px}.keep{background:var(--cobalt-wash);border-color:#d1ddf5}.empty{display:grid;justify-items:center;gap:10px;margin-top:24px;padding:32px 20px;border:1px dashed var(--line-strong);border-radius:16px;text-align:center}.empty-art{width:180px;height:auto}.empty .btn{margin-top:6px}.editor-bar{position:sticky;top:64px;z-index:15;background:#fdfdfcf2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}.editor-bar-inner{display:flex;align-items:center;gap:8px;min-height:62px}.editor-bar-title{display:grid;flex:1;min-width:0;line-height:1.25}.editor-bar-title strong{font:400 22px/1.2 var(--serif)}.editor-body{display:grid;gap:16px;padding-block:20px 40px;max-width:920px}.editor-meta{--gap: 14px}.desc{min-height:64px}.two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px}@media (max-width: 560px){.two{grid-template-columns:minmax(0,1fr)}}.editor-tools{display:flex;flex-wrap:wrap;gap:8px}.card-rows{list-style:none;padding:0;display:grid;gap:10px}.card-row{padding:10px 14px 14px;border:1px solid var(--line);border-radius:14px;background:#fff;content-visibility:auto;contain-intrinsic-size:auto 150px}.card-row-head{display:flex;align-items:center;justify-content:space-between}.card-num{font:650 13px var(--sans);color:var(--muted)}.card-row-tools{display:flex;gap:2px}.card-row-tools .icon-btn:disabled{opacity:.3;cursor:default}.card-row-fields{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:10px;margin-top:4px}@media (max-width: 640px){.card-row-fields{grid-template-columns:minmax(0,1fr)}}.grow-area{min-height:46px;resize:vertical;field-sizing:content;max-height:320px}.add-card{min-height:54px;border-style:dashed}.editor-foot{display:flex;justify-content:flex-end}.seps{border:0;padding:0;margin:0;display:grid;gap:8px;min-width:0}.chips-row{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.pick{min-height:40px;padding:0 14px;border:1px solid var(--line-strong);border-radius:999px;background:#fff;cursor:pointer;font:600 14px var(--sans);color:#33363c}.pick[aria-pressed=true]{background:var(--ink-solid);border-color:var(--ink-solid);color:#fff}.input-sm{width:96px;min-height:40px;padding:7px 10px}.paste-box{min-height:150px;font:14px/1.5 var(--mono)}.preview{list-style:none;padding:0;margin-top:8px;max-height:260px;overflow:auto;border:1px solid var(--line);border-radius:12px}.preview li{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:12px;padding:8px 12px;font-size:14px}.preview li+li{border-top:1px solid var(--line)}.preview li span:first-child{font-weight:600}.preview li span{overflow-wrap:anywhere}.modal-backdrop{position:fixed;inset:0;z-index:60;display:grid;place-items:center;padding:20px;background:#15171b66;animation:fade .15s ease;overflow:hidden}.modal{display:flex;flex-direction:column;width:min(600px,100%);max-height:min(88vh,900px);border-radius:18px;background:#fff;box-shadow:0 30px 80px -20px #0006;animation:rise .18s ease;min-width:0}.modal-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px 6px}.modal-title{font:400 26px/1.2 var(--serif);letter-spacing:-.015em}.modal-body{padding:12px 20px 20px;overflow-y:auto}.modal-foot{display:flex;align-items:center;gap:10px;padding:14px 20px;border-top:1px solid var(--line)}.icon-btn{display:inline-grid;place-items:center;width:44px;height:44px;flex:none;border:0;border-radius:10px;background:none;cursor:pointer;color:var(--muted)}.icon-btn:hover{background:#0000000a;color:var(--ink)}@keyframes fade{0%{opacity:0}}@keyframes rise{0%{opacity:0;transform:translateY(10px)}}@media (max-width: 600px){.modal-backdrop{place-items:end stretch;padding:0}.modal{width:100%;max-height:92vh;border-radius:18px 18px 0 0}}.toggle{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:52px;padding:6px 0;border-bottom:1px solid var(--line);cursor:pointer}.toggle.off{opacity:.55;cursor:default}.toggle-text{display:grid;gap:2px;font-weight:600;font-size:15px}.toggle-text .hint{font-weight:400}.toggle input{width:22px;height:22px;accent-color:var(--ink-solid)}.set-head{border-bottom:1px solid var(--line);background:linear-gradient(180deg,#faf6ee,#fdfdfc);padding:28px 0 22px}.set-title{margin-top:8px;font:360 clamp(32px,4.4vw,50px)/1.08 var(--serif);letter-spacing:-.03em;overflow-wrap:anywhere}.set-desc{margin-top:10px;color:#4a4e56;max-width:70ch;white-space:pre-line}.set-actions{margin-top:18px;--gap: 8px}.set-body{display:grid;gap:22px;padding-top:22px;max-width:980px}.made{display:grid;gap:12px}.modes{list-style:none;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}.mode{display:grid;gap:4px;align-content:start;height:100%;padding:16px;border:1px solid var(--line);border-bottom-width:3px;border-radius:14px;background:#fff;color:var(--ink)}.mode:hover{border-color:var(--line-strong);color:var(--ink)}.mode:active{transform:translateY(1px)}.mode svg{color:var(--cobalt);margin-bottom:6px}.mode-name{font:600 16.5px/1.2 var(--sans)}.mode-note{font-size:13.5px;color:var(--muted);line-height:1.35}@media (max-width: 900px){.modes{grid-template-columns:repeat(2,minmax(0,1fr))}.modes li:first-child{grid-column:1 / -1}}.terms{display:grid;gap:12px}.segmented{display:grid;gap:4px;padding:4px;border-radius:12px;background:var(--panel);border:1px solid var(--panel-line)}.two-seg{grid-template-columns:repeat(2,auto)}.segmented button{min-height:36px;padding:0 12px;border:0;border-radius:9px;background:transparent;cursor:pointer;font:600 14px var(--sans);color:var(--muted)}.segmented button[aria-checked=true]{background:#fff;color:var(--ink-solid);box-shadow:0 1px 3px #0000001a}.term-list{list-style:none;padding:0;display:grid;gap:8px}.term-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.4fr) auto;gap:8px 16px;align-items:start;padding:10px 6px 10px 16px;border:1px solid var(--line);border-radius:14px;background:#fff}.term-side{display:flex;align-items:flex-start;justify-content:space-between;gap:4px;min-width:0}.term-text{padding-top:10px;overflow-wrap:anywhere;white-space:pre-line}.term-side:first-child .term-text{font-weight:600}.term-side.def{border-left:1px solid var(--line);padding-left:16px}@media (max-width: 640px){.term-row{grid-template-columns:minmax(0,1fr) auto}.term-side.def{grid-column:1;grid-row:2;border-left:0;padding-left:0;border-top:1px solid var(--line)}.term-row .star{grid-column:2;grid-row:1}}.star.on{color:var(--gold)}.empty-line{padding:18px 0}.owner-box{--gap: 10px}.link-code{flex:1;min-width:0;padding:9px 11px;border-radius:8px;background:var(--panel);border:1px solid var(--panel-line);font:13px var(--mono);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.manage{--gap: 4px}.study{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;background:var(--paper)}.study-bar{position:sticky;top:0;z-index:20;background:#fdfdfcf2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}.study-bar-inner{display:flex;align-items:center;gap:6px;max-width:760px;margin:0 auto;padding:8px 12px;padding-top:max(8px,env(safe-area-inset-top))}.study-bar-title{display:grid;flex:1;min-width:0;line-height:1.25}.study-bar-title strong{font:650 15.5px var(--sans)}.study-bar-title span{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.study-count{font:650 14px var(--sans);color:var(--muted);padding:0 4px}.study-progress{height:3px;background:var(--panel)}.study-progress span{display:block;height:100%;background:var(--sage);transition:width .25s}.study-body{flex:1;width:100%;max-width:760px;margin:0 auto;padding:20px 16px 40px;display:flex;flex-direction:column;gap:16px}.study-done{display:grid;justify-items:center;gap:12px;text-align:center;padding:28px 4px}.done-art{width:170px;height:auto}.center-row{justify-content:center}.score-pair{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.score{display:grid;justify-items:center;min-width:130px;padding:12px 16px;border-radius:14px;font-weight:600}.score strong{font:400 34px/1.1 var(--serif)}.score.know{background:var(--sage-wash);color:#2f5a3c}.score.learning{background:var(--brick-wash);color:#7c2f1d}.score-big{font:330 64px/1 var(--serif);letter-spacing:-.03em}.label.center{text-align:center}.flash{position:relative;perspective:1400px;touch-action:pan-y;user-select:none;-webkit-user-select:none;cursor:pointer;outline:none;transition:transform .2s ease}.flash:focus-visible .flash-face{outline:2px solid var(--cobalt);outline-offset:3px}.flash-inner{position:relative;height:min(56vh,440px);min-height:280px;transform-style:preserve-3d;transition:transform .38s ease;animation:rise .2s ease}.flipped .flash-inner{transform:rotateY(180deg)}.flash-face{position:absolute;inset:0;display:flex;flex-direction:column;padding:12px 14px 20px 20px;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:var(--shadow);backface-visibility:hidden;-webkit-backface-visibility:hidden;overflow:hidden}.flash-back{transform:rotateY(180deg);background:#fffdf8}.to-know .flash-face{border-color:#9cc5a8}.to-learn .flash-face{border-color:#e2a999}.flash-tools{display:flex;align-items:center;justify-content:space-between;gap:8px}.flash-text{flex:1;display:flex;align-items:center;justify-content:center;text-align:center;padding:8px 6px 0 0;overflow-y:auto;overflow-wrap:anywhere;white-space:pre-line}.face-xl{font:380 clamp(30px,7vw,46px)/1.15 var(--serif);letter-spacing:-.02em}.face-lg{font:400 clamp(23px,5vw,30px)/1.3 var(--serif)}.face-md{font:400 19px/1.5 var(--sans)}.face-sm{font:400 16px/1.55 var(--sans);align-items:flex-start!important;text-align:left!important}.swipe-label{position:absolute;top:18px;padding:6px 12px;border-radius:10px;font:700 14px var(--sans);letter-spacing:.04em;text-transform:uppercase;pointer-events:none}.swipe-label.know{left:18px;color:#2f5a3c;background:var(--sage-wash);border:2px solid #9cc5a8}.swipe-label.learning{right:18px;color:#7c2f1d;background:var(--brick-wash);border:2px solid #e2a999}.flash-hint{text-align:center;min-height:22px}.flash-actions{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:10px;align-items:center}.flash-actions .btn-lg{padding:0 12px;min-height:58px}.learn-btn{color:var(--brick)}.know-btn{color:#2f5a3c}.undo:disabled{opacity:.3;cursor:default}.learn,.review{display:grid;gap:16px}.prompt-card{display:flex;flex-direction:column;min-height:200px;padding:12px 14px 22px 20px;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:var(--shadow)}.prompt-card .flash-text{min-height:130px}.options{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px}@media (max-width: 640px){.options{grid-template-columns:minmax(0,1fr)}}.option{display:flex;align-items:center;gap:12px;min-height:58px;padding:10px 14px;border:1px solid var(--line-strong);border-bottom-width:3px;border-radius:14px;background:#fff;text-align:left;cursor:pointer;font:500 15.5px/1.35 var(--sans);color:var(--ink);overflow-wrap:anywhere}.option:hover:not(:disabled){border-color:#9aa4b2}.option:disabled{cursor:default}.option.chosen{border-color:var(--cobalt);background:var(--cobalt-wash)}.option.right{border-color:#6fa57f;background:var(--sage-wash);color:#23482f}.option.wrong{border-color:#d48a76;background:var(--brick-wash);color:#6c2817}.option.dim{opacity:.55}.option-key{display:grid;place-items:center;flex:none;width:28px;height:28px;border-radius:8px;background:var(--panel);font:650 13px var(--sans);color:var(--muted)}.write{display:grid;gap:12px}.input-lg{min-height:56px;font-size:18px}.input.is-right{border-color:#6fa57f;background:var(--sage-wash)}.input.is-wrong{border-color:#d48a76;background:var(--brick-wash)}.feedback{display:grid;gap:8px;padding:14px 16px;border-radius:14px}.feedback.ok{background:var(--sage-wash);color:#23482f}.feedback.bad{background:var(--brick-wash);color:#6c2817}.feedback .answer{font-weight:650}.feedback .row{margin-top:4px}.round-list{list-style:none;padding:0;width:100%;max-width:520px;display:grid;gap:6px;text-align:left}.round-list li{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 14px;border:1px solid var(--line);border-radius:12px;background:#fff}.round-list li span:first-child{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.test-setup{--gap: 16px}.input-num{width:120px}.test-list{list-style:none;padding:0;display:grid;gap:14px}.test-q{display:grid;gap:12px}.test-q.is-right{border-color:#9cc5a8}.test-q.is-wrong{border-color:#e2a999}.test-prompt{font:400 22px/1.35 var(--serif);overflow-wrap:anywhere;white-space:pre-line}.test-shown{padding:12px 14px;border-radius:12px;background:var(--panel);overflow-wrap:anywhere}.tf{display:grid;grid-template-columns:1fr 1fr;gap:10px}.tf .option{justify-content:center;font-weight:600}.match-q{display:grid;gap:14px}.match-options{list-style:none;padding:0;display:grid;gap:6px}.match-options li{display:flex;gap:10px;align-items:flex-start;font-size:15px;overflow-wrap:anywhere}.match-rows{list-style:none;padding:0;display:grid;gap:8px}.match-rows li{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:8px 10px;border:1px solid var(--line);border-radius:12px}.match-rows li>span:nth-child(2){flex:1;min-width:0;font-weight:600;overflow-wrap:anywhere}.match-rows li.is-right{border-color:#9cc5a8;background:var(--sage-wash)}.match-rows li.is-wrong{border-color:#e2a999;background:var(--brick-wash)}.select-letter{width:76px;min-height:44px;padding:8px}.test-fix{font-size:14px;font-weight:600;color:#6c2817}.test-review{display:grid;gap:4px;padding-top:8px;border-top:1px solid var(--line)}.match-head{display:flex;align-items:baseline;justify-content:center;gap:10px}.match-time{font:400 34px/1 var(--serif);font-variant-numeric:tabular-nums}.match-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}@media (min-width: 700px){.match-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}}.tile-btn{display:grid;place-items:center;min-height:108px;padding:10px 8px;border:1px solid var(--line-strong);border-bottom-width:3px;border-radius:14px;background:#fff;cursor:pointer;text-align:center;color:var(--ink);overflow:hidden;overflow-wrap:anywhere;transition:opacity .2s,transform .15s,background .15s}.tile-btn>span{display:-webkit-box;-webkit-line-clamp:6;-webkit-box-orient:vertical;overflow:hidden}.tile-btn .face-xl{font:500 20px/1.25 var(--sans)}.tile-btn .face-lg{font:500 16px/1.3 var(--sans)}.tile-btn .face-md,.tile-btn .face-sm{font:400 13.5px/1.35 var(--sans);text-align:center!important}.tile-btn.picked{border-color:var(--cobalt);background:var(--cobalt-wash);transform:translateY(-1px)}.tile-btn.wrong{border-color:#d48a76;background:var(--brick-wash);animation:shake .3s}.tile-btn.gone{opacity:0;pointer-events:none;transform:scale(.9)}@keyframes shake{25%{transform:translate(-4px)}75%{transform:translate(4px)}}.review-meta{text-align:center}.review-card{min-height:260px}.review-answer{margin-top:12px;padding-top:8px;border-top:1px dashed var(--line-strong);display:flex;flex-direction:column}.ratings{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.rating{display:grid;gap:2px;justify-items:center;min-height:64px;padding:8px 4px;border:1px solid var(--line-strong);border-bottom-width:3px;border-radius:14px;background:#fff;cursor:pointer;color:var(--ink)}.rating strong{font:650 15px var(--sans)}.rating span{font-size:13px;color:var(--muted)}.rating.r0 strong{color:var(--brick)}.rating.r3 strong{color:#2f6b45}.set-body,.terms,.term-list,.made,.owner-box,.editor-body,.editor-meta,.card-rows,.quick,.quick-preview,.learn,.review,.write,.feedback,.test-list,.test-q,.test-review,.match-q,.modal .stack,.library-side>*{grid-template-columns:minmax(0,1fr)}.set-head .wrap{max-width:980px}.editor-bar .wrap{max-width:920px}.tile-btn,.flash-text,.test-prompt,.term-text,.option{overflow-wrap:break-word;hyphens:auto;-webkit-hyphens:auto}.tile-btn .face-xl{font-size:18px}