:root{--bg:#fafafa;--surface:#fff;--ink:#1d1d1f;--secondary:#65656a;--blue:#0066cc;--line:#e4e4e8;--font:-apple-system,BlinkMacSystemFont,'Helvetica Neue','PingFang SC','Microsoft YaHei',sans-serif;--ease:cubic-bezier(.2,.7,.2,1)}
*{box-sizing:border-box}html{font-size:16px}body{margin:0;background:var(--bg);color:var(--ink);font:1rem/1.5 var(--font);-webkit-font-smoothing:antialiased}button,input,select{font:inherit;color:inherit}button{cursor:pointer;border:0;background:none;-webkit-tap-highlight-color:transparent}button:disabled{opacity:.4;cursor:not-allowed}a{color:inherit;text-decoration:none}button,a,input,select{touch-action:manipulation}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #0071e3;outline-offset:4px}button:active:not(:disabled){transform:scale(.98)}[hidden]{display:none!important}h1,h2,h3,p{margin:0;text-wrap:pretty}h1,h2,h3{font-weight:600}svg{display:block}::selection{background:#cbe5ff}.skip{position:fixed;top:-80px;left:16px;background:var(--ink);color:white;padding:12px;z-index:50}.skip:focus{top:12px}
.header{height:88px;max-width:1260px;padding:0 36px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;gap:10px;align-items:center;font-size:20px;font-weight:600;letter-spacing:.5px}.brand>span{font-size:31px;line-height:1;font-weight:400;color:var(--blue)}.segmented{display:flex;padding:4px;border-radius:100px;background:#eaeaec;gap:2px}.segmented button{border-radius:100px;min-height:40px;padding:8px 23px;font-size:15px;color:#56565c;transition:background .2s,box-shadow .2s}.segmented button.active{background:var(--surface);color:var(--ink);box-shadow:0 2px 7px #0000000b}.saved-nav{display:flex;align-items:center;gap:7px;font-size:16px;min-height:44px;padding:8px}.saved-nav svg{width:20px;height:20px}.saved-nav b{font-size:13px;font-weight:500;min-width:20px;text-align:center;background:#eaeaec;border-radius:50%;line-height:20px}.saved-nav b:empty{display:none}main{max-width:1120px;margin:auto;padding:0 36px 48px}.view{animation:appear .35s var(--ease)}.hero{text-align:center;padding-top:30px}.hero h1{font-size:clamp(40px,4.5vw,60px);line-height:1.2;letter-spacing:-1px;font-weight:650}.hero h1 span{color:var(--secondary)}.hero p{font-size:20px;color:var(--secondary);line-height:1.6;margin-top:18px}.format-control{display:flex;align-items:center;justify-content:center;gap:7px;margin:27px auto 22px;font-size:17px}.format-control label{color:var(--secondary)}select{border:0;background:transparent;color:var(--blue);font-weight:500;min-height:44px;max-width:100%;cursor:pointer;padding:5px 7px}.words,.deck{max-width:900px;margin:0 auto;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.word{position:relative;min-width:0;border-radius:24px;background:var(--surface);box-shadow:0 4px 25px #00000004;border:1px solid #ededf0;transition:box-shadow .25s,transform .25s;overflow:hidden}.word-choice{width:100%;min-height:218px;padding:25px 24px 22px;display:flex;flex-direction:column;align-items:flex-start;text-align:left}.word-label{font-size:15px;line-height:1.4;color:var(--secondary);padding-right:42px;min-height:30px}.word-title{display:block;font-size:36px;font-weight:600;letter-spacing:-.6px;line-height:1.25;margin:24px 0 19px;overflow-wrap:anywhere}.word-edit{font-size:16px;color:var(--blue);margin-top:auto;display:flex;gap:6px;align-items:center}.lock{position:absolute;top:13px;right:12px;width:44px;height:44px;border-radius:50%;display:grid;place-items:center;color:#7b7b80;transition:background .2s,color .2s}.lock svg{width:19px;height:19px}.lock[aria-pressed=true]{background:#e6f1ff;color:var(--blue)}.word.locked{border-color:#bcd9f7}.word.locked .word-edit{color:var(--secondary)}.word.locked .word-choice{cursor:default}.word:nth-child(1){background:#f0f5fb}.word:nth-child(2){background:#f2f5f0}.word:nth-child(3){background:#f8f3ed}.actions{display:flex;align-items:center;justify-content:center;gap:22px;margin-top:32px;flex-wrap:wrap}.primary{display:inline-flex;justify-content:center;align-items:center;gap:18px;min-width:184px;min-height:52px;padding:12px 26px;border-radius:100px;color:white;background:#0071e3;font-size:18px;font-weight:500;transition:background .2s,transform .2s}.primary:disabled{background:#0071e3}.secondary{font-size:18px;color:var(--blue);padding:12px 8px;min-height:48px}.hint{font-size:15px;color:var(--secondary);text-align:center;margin-top:18px;line-height:1.7}.pool-control{width:max-content;max-width:100%;margin:28px auto 23px}.pool-control button{font-size:16px;padding:8px 24px}.deck-card{min-width:0;perspective:1100px;position:relative}.flip{height:228px;width:100%;position:relative;border-radius:24px;transform-style:preserve-3d;transition:transform .55s var(--ease);padding:0;text-align:left}.deck-card.revealed .flip{transform:rotateY(180deg)}.face{position:absolute;inset:0;border-radius:24px;backface-visibility:hidden;-webkit-backface-visibility:hidden;border:1px solid #e5e9ee;overflow:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:22px;background:#f0f5fb}.deck-card:nth-child(2) .face{background:#f2f5f0;border-color:#e4e9e2}.deck-card:nth-child(3) .face{background:#f8f3ed;border-color:#ede7df}.back>span{font-size:68px;font-weight:300;color:#6889ab;line-height:1.2;display:block;margin-bottom:22px}.deck-card:nth-child(2) .back>span{color:#76906e}.deck-card:nth-child(3) .back>span{color:#b09572}.back small{font-size:17px;color:var(--secondary)}.front{transform:rotateY(180deg);align-items:flex-start;justify-content:flex-start}.front small{font-size:15px;color:var(--secondary);padding-right:34px}.front strong{font-size:34px;line-height:1.25;letter-spacing:-.5px;margin:25px 0 15px;font-weight:600}.front p{font-size:16px;line-height:1.6;color:var(--secondary)}.deck-card .lock{z-index:2}.result{max-width:750px;margin:50px auto 0;animation:appear .3s var(--ease)}.back-button{font-size:17px;color:var(--blue);padding:10px 0;min-height:44px}.result .overline{font-size:17px;color:var(--secondary);margin:28px 0 14px}.result h1{font-size:44px;line-height:1.3;letter-spacing:-.6px}.result-description{font-size:21px;line-height:1.85;margin-top:25px;color:#49494e}.tags{display:flex;gap:9px;flex-wrap:wrap;margin:24px 0}.tags span{font-size:16px;background:#eeeeF0;padding:7px 14px;border-radius:100px;color:#545459}.first-step{border-top:1px solid var(--line);margin-top:30px;padding-top:24px;font-size:18px;line-height:1.75}.first-step strong{display:block;font-size:18px;font-weight:600;margin-bottom:7px}.first-step p{color:var(--secondary)}.result .actions{justify-content:flex-start;margin-top:28px}.result .primary{min-width:170px}.saved .hero{padding-top:70px}.saved .hero h1{font-size:44px}.saved .hero p{font-size:19px}#saved-grid{max-width:820px;margin:45px auto 0;display:grid;gap:18px}.saved-card{background:white;border:1px solid #eee;border-radius:20px;padding:28px}.saved-card h2{font-size:27px;line-height:1.35;max-width:80%}.saved-card p{font-size:18px;color:var(--secondary);line-height:1.8;margin-top:14px}.saved-card .tags{margin:17px 0 8px}.saved-card .saved-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:10px}.delete-saved{font-size:16px;color:var(--secondary);padding:12px;min-height:44px}.empty{font-size:18px;color:var(--secondary);line-height:1.8;text-align:center;padding:35px 20px}.saved-empty{text-align:center;padding:35px 0}.saved-empty p{font-size:20px;color:var(--secondary);margin-bottom:20px}
/* A focused, dismissible choice instead of an always-visible catalog. */
dialog{padding:26px;border:0;border-radius:28px;width:min(650px,calc(100vw - 32px));max-height:min(740px,90dvh);background:var(--surface);color:var(--ink);box-shadow:0 25px 100px #0003;overflow-y:auto}dialog::backdrop{background:#0005;backdrop-filter:blur(6px)}.sheet-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:19px}.sheet-heading h2{font-size:27px;font-weight:600;line-height:1.4}.icon-button{display:grid;place-items:center;flex-shrink:0;width:44px;height:44px;background:#f0f0f2;border-radius:50%;font-size:28px;line-height:1}.search{display:flex;align-items:center;gap:10px;background:#f2f2f4;border-radius:13px;padding:0 15px;min-height:52px}.search svg{width:21px;height:21px;flex-shrink:0;color:var(--secondary)}.search input{width:100%;min-width:0;border:0;background:none;padding:12px 0;font-size:17px;outline-offset:4px}.categories{display:flex;gap:7px;flex-wrap:wrap;margin:20px 0}.categories button{font-size:15px;padding:10px 14px;min-height:44px;border-radius:100px;color:var(--secondary);background:#f5f5f7;white-space:nowrap}.categories button.active{background:#e6f1ff;color:var(--blue)}.choices{display:grid;grid-template-columns:1fr 1fr;gap:9px}.choice{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:62px;padding:15px 17px;border-radius:13px;background:#f5f5f7;text-align:left;font-size:20px}.choice.selected{background:#e6f1ff;color:var(--blue)}.choice span:last-child{font-size:16px;color:var(--secondary)}.choice:disabled{opacity:.5}#toast{position:fixed;left:50%;bottom:25px;transform:translate(-50%,12px);opacity:0;pointer-events:none;background:#303034;color:#fff;padding:13px 22px;border-radius:100px;max-width:90%;font-size:16px;text-align:center;z-index:100;box-shadow:0 4px 20px #0001;transition:opacity .2s,transform .2s}#toast.show{opacity:1;transform:translate(-50%,0)}
@media(hover:hover) and (pointer:fine){.word:not(.locked):hover{box-shadow:0 8px 30px #00000009;transform:translateY(-3px)}.primary:hover:not(:disabled){background:#0077ed}.secondary:hover,.saved-nav:hover{color:#004e9c}.choice:hover:not(:disabled){background:#e9e9ed}.choice.selected:hover{background:#d9eafe}.lock:hover{background:#00000008}}
@keyframes appear{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:800px){.header{padding:0 24px}.header .segmented button{padding:8px 17px}.brand{font-size:18px}.words,.deck{gap:12px}.word-choice{padding:24px 18px;min-height:205px}.word-title{font-size:30px}.word-label{font-size:14px}.front strong{font-size:29px}.front p{font-size:15px}.face{padding:18px}.hero h1{font-size:49px}.hero p{font-size:19px}.flip{height:225px}.saved-nav>span{display:none}}
@media(max-width:600px){.header{height:112px;padding:14px 24px 0;flex-wrap:wrap;gap:10px}.brand{font-size:19px;gap:7px}.brand>span{font-size:29px}.header>.segmented{order:3;margin:auto;width:100%;max-width:360px}.header>.segmented button{flex:1;font-size:16px;min-height:40px;padding:7px 16px}.saved-nav>span{display:inline}.saved-nav{font-size:16px;padding:3px}.saved-nav b{font-size:12px}.saved-nav svg{width:18px;height:18px}main{padding:0 24px 36px}.hero{padding-top:32px}.hero h1{font-size:40px;line-height:1.2;letter-spacing:-.5px}.hero p{font-size:17px;line-height:1.6;margin-top:15px}.format-control{font-size:17px;margin:19px auto 17px}.words{grid-template-columns:1fr;gap:10px;max-width:430px}.word{border-radius:19px}.word-choice{display:grid;grid-template-columns:88px minmax(0,1fr) 20px;align-items:center;gap:10px;min-height:92px;padding:18px 59px 18px 19px}.word-label{font-size:15px;padding:0;min-height:0}.word-title{font-size:28px;letter-spacing:0;margin:0;line-height:1.2}.word-edit{font-size:20px;margin:0;position:absolute;right:61px;top:50%;transform:translateY(-50%)}.word-edit .edit-label{display:none}.lock{top:50%;transform:translateY(-50%);right:9px}.lock:active:not(:disabled){transform:translateY(-50%) scale(.96)}.word-choice{grid-template-columns:78px minmax(0,1fr);padding-right:88px}.word.locked .word-edit{display:none}.actions{gap:20px;margin-top:23px}.primary{font-size:18px;min-height:52px;min-width:184px;padding:12px 24px}.secondary{font-size:17px}.hint{font-size:14px;margin-top:16px}.pool-control{margin:25px auto 20px}.pool-control button{font-size:16px;padding:8px 18px;min-height:42px}.deck{display:grid;grid-template-columns:1fr;gap:10px;max-width:430px}.flip{height:105px;border-radius:19px}.face{border-radius:19px;padding:17px 58px 17px 19px}.back{flex-direction:row;justify-content:flex-start;gap:22px;padding-right:19px}.back>span{font-size:39px;margin:0;width:45px;text-align:center}.back small{font-size:18px}.front{display:grid;grid-template-columns:80px minmax(0,1fr);gap:10px;align-content:center;align-items:center}.front small{font-size:15px;padding:0}.front strong{font-size:27px;margin:0;letter-spacing:0;line-height:1.25}.front p{display:none}.deck-card .lock{top:50%;right:9px}.result{margin:28px auto 0}.back-button{font-size:17px}.result .overline{font-size:16px;margin-top:25px}.result h1{font-size:33px;line-height:1.35}.result-description{font-size:19px;line-height:1.85;margin-top:20px}.tags{gap:7px;margin:20px 0}.tags span{font-size:15px;padding:6px 12px}.first-step{font-size:17px;margin-top:25px;padding-top:21px}.first-step strong{font-size:18px}.result .actions{justify-content:center;gap:14px}.result .primary{min-width:175px}.saved .hero{padding-top:40px}.saved .hero h1{font-size:34px}.saved .hero p{font-size:17px}#saved-grid{margin-top:30px}.saved-card{padding:23px}.saved-card h2{font-size:25px;max-width:100%}.saved-card p{font-size:17px}.saved-card .tags span{font-size:14px}.saved-card .saved-actions .secondary{font-size:16px}dialog{position:fixed;inset:auto 0 0;margin:0;width:100%;max-width:none;max-height:88dvh;border-radius:27px 27px 0 0;padding:23px 20px max(24px,env(safe-area-inset-bottom));animation:appear .25s var(--ease)}.sheet-heading{margin-bottom:18px}.sheet-heading h2{font-size:25px}.categories{gap:7px;margin:18px 0}.categories button{font-size:15px;min-height:42px;padding:9px 13px}.choices{gap:8px}.choice{font-size:20px;min-height:61px;padding:14px}.choice span:last-child{font-size:13px}.search input{font-size:17px}#toast{font-size:15px;width:max-content;border-radius:18px;bottom:20px}}
@media(max-width:360px){.header{padding-left:18px;padding-right:18px}main{padding-left:18px;padding-right:18px}.hero h1{font-size:35px}.hero p{font-size:16px}.word-title{font-size:25px}.word-choice{grid-template-columns:68px minmax(0,1fr);padding-left:15px;padding-right:81px}.word-label{font-size:14px}.word-edit{right:56px}.pool-control button{padding-left:14px;padding-right:14px}.front{grid-template-columns:70px minmax(0,1fr)}.front strong{font-size:25px}.categories button{padding:8px 11px;font-size:14px}.choice{font-size:18px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.undo{color:#9dcbff;font-size:inherit;font-weight:500;margin-left:15px;padding:5px}.result h1:focus{outline:none}

@media(max-width:600px){.categories{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:4px}.categories button{padding:10px 4px;font-size:15px;min-height:44px}}

.site-footer{text-align:center;padding:12px 24px 26px}.site-footer a{display:inline-flex;align-items:center;gap:8px;min-height:44px;color:#6e6e73;font-size:15px;text-decoration:none}.site-footer a:hover{color:#0071e3}