*,*:before,*:after{box-sizing:border-box}*{margin:0}html{interpolate-size:allow-keywords}body{line-height:1.5;-webkit-font-smoothing:antialiased}img,picture,video,canvas,svg{display:block;max-width:100%}input,button,textarea,select{font:inherit}p{overflow-wrap:break-word;text-wrap:pretty}h1,h2,h3,h4,h5,h6{overflow-wrap:break-word;text-wrap:balance}#root,#app{isolation:isolate}:root{--paper: #f7f1e3;--paper-deep: #efe6d2;--card: #fffdf6;--ink: #2c2e2b;--ink-soft: #6d6a5e;--red: #e2412a;--blue: #2b62d9;--yellow: #f5b301;--ink-line: 2.5px;--grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23g)' opacity='0.28'/%3E%3C/svg%3E");--key-height: clamp(2.1rem, 8vh, 4.3rem);--key-gap: clamp(.28rem, .9vh, .55rem);--op-col: clamp(2.9rem, 13vw, 3.7rem);--display-type: clamp(1.6rem, 6.5vh, 2.75rem);--font-body: "Helvetica Neue", Helvetica, Arial, sans-serif;--font-hand: "Bradley Hand", "Chalkboard SE", "Segoe Script", "Comic Sans MS", cursive;font-family:var(--font-body);color-scheme:light dark}@media(prefers-color-scheme:dark){:root{--paper: #23241f;--paper-deep: #1b1c18;--card: #2c2e28;--ink: #f4eede;--ink-soft: #b3ab97;--red: #ff6a4d;--blue: #7c9dff;--yellow: #ffc93f}}body{min-height:100dvh;background-color:var(--paper);color:var(--ink)}body:before{content:"";position:fixed;inset:0;background-image:var(--grain);opacity:.05;pointer-events:none;z-index:0}@media(prefers-color-scheme:dark){body:before{opacity:.09}}.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.page{position:relative;max-width:60ch;margin-inline:auto;padding:3rem 2rem}.page h1{font-size:clamp(2.5rem,12vw,4rem);letter-spacing:-.03em}.page p{color:var(--ink-soft);font-family:var(--font-hand);font-size:1.25rem}.home{position:relative;z-index:1;display:flex;flex-direction:column;height:100dvh;gap:clamp(.5rem,1.4vh,1rem);max-width:27rem;margin-inline:auto;padding:clamp(.6rem,2vh,1.5rem) clamp(.75rem,4vw,1.25rem)}.home__hint{color:var(--ink-soft);font-size:.8rem;text-align:center}@media(max-height:560px){:root{--key-height: clamp(1.55rem, 5.6vh, 2.4rem);--key-gap: .28rem;--display-type: clamp(1.15rem, 5vh, 1.6rem)}.home__hint{display:none}.display__tape{min-height:.95rem;font-size:.75rem}.display__note{font-size:.78rem}.key--utility{min-height:1.6rem}.key--equals{min-height:1.9rem}}.calculator{display:flex;flex-direction:column;flex:1;justify-content:center;min-height:0;gap:clamp(.55rem,1.6vh,1.1rem);width:100%}.display{position:relative;flex:0 0 auto;padding:clamp(.5rem,1.4vh,.95rem) clamp(.75rem,3vw,1.15rem);border:3px solid var(--ink);border-radius:22px 14px 26px 16px/16px 26px 14px 24px;background-color:var(--card);background-image:var(--grain);background-blend-mode:multiply;transform:rotate(-.35deg)}@media(prefers-color-scheme:dark){.display{background-blend-mode:screen}}.display__tape{min-height:1.2rem;color:var(--ink-soft);font-size:.85rem;letter-spacing:.01em}.display__value{display:block;overflow-x:auto;color:var(--ink);font-size:var(--display-type);font-weight:700;letter-spacing:-.02em;line-height:1.15;text-align:right;white-space:nowrap}.display__note{color:var(--blue);font-family:var(--font-hand);font-size:.9rem;text-align:right;transform:rotate(-.8deg)}.pad{display:flex;flex-direction:column;gap:var(--key-gap)}.pad__utilities{display:flex;gap:var(--key-gap)}.pad__main{display:grid;grid-template-columns:1fr var(--op-col);gap:var(--key-gap);align-items:start}.pad__digits{display:grid;grid-auto-rows:minmax(var(--key-height),1fr);gap:var(--key-gap);min-height:calc(4 * var(--key-height) + 3 * var(--key-gap))}.pad__row{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--key-gap)}.pad__operators{display:grid;grid-auto-rows:var(--key-height);gap:var(--key-gap)}.pad__footer{display:grid;grid-template-columns:1fr var(--op-col);gap:var(--key-gap);align-items:stretch}.key{padding:.3rem .35rem;min-width:0;min-height:0;border:var(--ink-line) solid var(--ink);border-radius:16px 22px 14px 20px/20px 14px 22px 16px;background-color:var(--card);color:var(--ink);font-family:var(--font-body);font-size:clamp(1rem,2.6vh,1.3rem);font-weight:500;line-height:1;cursor:pointer;transition:transform 80ms steps(2,end),background-color 80ms}.pad__row .key:nth-child(1){border-radius:20px 14px 22px 15px/14px 21px 15px 23px;transform:rotate(-.6deg)}.pad__row .key:nth-child(2){border-radius:13px 23px 15px 21px/22px 14px 24px 13px;transform:rotate(.5deg)}.pad__row .key:nth-child(3){border-radius:22px 15px 20px 13px/15px 23px 13px 21px;transform:rotate(-.3deg)}.key:hover{background-color:var(--paper-deep)}.key:active{transform:rotate(.9deg) translateY(2px)}.key:focus-visible{outline:var(--ink-line) dashed var(--blue);outline-offset:3px}.key--utility{flex:1;min-height:clamp(1.9rem,4.6vh,2.4rem);font-size:clamp(.85rem,2.1vh,1.05rem)}.key--utility:first-child{background-color:var(--red);border-color:var(--ink);color:#fffdf6}.key--operator{background-color:var(--paper-deep);font-size:clamp(1.05rem,2.7vh,1.4rem);transform:rotate(.6deg)}.key--armed{background-color:var(--blue);color:#fffdf6}.key--equals{min-height:clamp(2.1rem,5.4vh,2.9rem);background-color:var(--yellow);color:#2c2e2b;font-size:clamp(1.15rem,3vh,1.5rem);font-weight:700;transform:rotate(-.8deg)}.sets{display:flex;align-items:center;gap:.45rem;min-width:0;padding:.25rem .5rem;border:var(--ink-line) solid var(--ink);border-radius:18px 24px 14px 22px/22px 14px 24px 18px;background-color:var(--paper-deep);background-image:var(--grain);background-blend-mode:multiply;transform:rotate(-.5deg)}@media(prefers-color-scheme:dark){.sets{background-blend-mode:screen}}.sets__label{color:var(--ink);font-family:var(--font-hand);font-size:clamp(.85rem,2.2vh,1.05rem);white-space:nowrap}.sets__select{flex:1;min-width:0;padding:.3rem 1.5rem .3rem .55rem;border:var(--ink-line) solid var(--ink);border-radius:14px 20px 12px 22px/20px 12px 22px 14px;background-color:var(--yellow);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1.5 6 6.5 11 1.5' fill='none' stroke='%232c2e2b' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .5rem center;color:#2c2e2b;font-family:var(--font-body);font-size:clamp(.85rem,2.2vh,1rem);font-weight:500;cursor:pointer;appearance:none;transition:transform 90ms steps(3,end),background-color 90ms}.sets__select:hover{transform:rotate(.6deg) translateY(-1px)}.sets__select:focus-visible{outline:var(--ink-line) dashed var(--blue);outline-offset:3px}.sets__select option{background-color:var(--card);color:var(--ink)}@media(prefers-reduced-motion:reduce){.key,.sets__select{transition:none}}