.calc{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;max-width:440px;margin:0 auto;padding:0 1px;padding-top:5rem}.calc__back{font-family:var(--font-mono);font-size:.8125rem;color:var(--c-text-3);text-decoration:none;letter-spacing:.02em;transition:color .2s ease;display:inline-block;padding:0 1.5rem;margin-bottom:1rem}.calc__back:hover{color:var(--c-accent)}.calc__display{position:relative;flex:1;display:flex;flex-direction:column;justify-content:flex-end;padding:1.5rem;min-height:160px;overflow:hidden}.calc__expression{font-family:var(--font-mono);font-size:clamp(.9375rem,2.5vw,1.125rem);color:var(--c-text-3);text-align:right;min-height:1.5em;overflow-x:auto;white-space:nowrap;scrollbar-width:none;letter-spacing:.02em;padding-bottom:.5rem}.calc__expression::-webkit-scrollbar{display:none}.calc__result{font-family:var(--font-display);font-size:clamp(3rem,12vw,4.5rem);font-weight:300;font-variation-settings:'opsz' 144;color:var(--c-text);text-align:right;line-height:1.1;letter-spacing:-.02em;word-break:break-all;transition:opacity .12s ease}.calc__result--small{font-size:clamp(2rem,8vw,3rem)}.calc__result--xs{font-size:clamp(1.25rem,5vw,2rem)}.calc__result--error{color:var(--c-accent)}.calc__copy{position:absolute;top:1.5rem;right:1.5rem;font-family:var(--font-mono);font-size:.75rem;color:var(--c-text-3);background:0 0;border:none;padding:.25rem .5rem;cursor:pointer;letter-spacing:.04em;opacity:0;pointer-events:none;transition:opacity .2s ease,color .2s ease}.calc__copy--visible{opacity:1;pointer-events:auto}.calc__copy:hover{color:var(--c-text-2)}.calc__copy--done{color:var(--c-accent)}.calc__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--c-border);border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border)}.calc__btn{display:flex;align-items:center;justify-content:center;background:var(--c-bg);border:none;padding:1.25rem 0;cursor:pointer;user-select:none;-webkit-tap-highlight-color:transparent;transition:background .12s ease,transform .1s ease;font-size:1.25rem;color:var(--c-text);line-height:1}.calc__btn:hover{background:var(--c-tag-bg)}.calc__btn:active,.calc__btn--pressed{background:var(--c-tag-bg);transform:scale(.95)}.calc__btn--num{font-family:var(--font-display);font-weight:400;font-variation-settings:'opsz' 48;font-size:1.375rem}.calc__btn--op{font-family:var(--font-display);font-weight:500;font-size:1.5rem;color:var(--c-accent)}.calc__btn--fn{font-family:var(--font-mono);font-weight:500;font-size:.9375rem;color:var(--c-text-2);letter-spacing:.02em}.calc__btn--eq{font-family:var(--font-display);font-weight:500;font-size:1.5rem;background:var(--c-accent);color:#fff}.calc__btn--eq:hover{background:var(--c-accent-hover)}.calc__btn--eq:active,.calc__btn--eq.calc__btn--pressed{background:var(--c-accent-hover);transform:scale(.95)}.calc__info{padding:1.5rem;margin-top:auto}.calc__info p{font-size:.8125rem;color:var(--c-text-3);line-height:1.7;max-width:640px}@media(max-width:480px){.calc{padding:0;padding-top:4.5rem}.calc__back{padding:0 1rem}.calc__display{padding:1rem;min-height:140px}.calc__copy{top:1rem;right:1rem}.calc__btn{padding:1rem 0}.calc__info{padding:1rem}}@media(min-width:769px){.calc{padding-top:6rem}.calc__btn{padding:1.5rem 0}}@media(prefers-reduced-motion:reduce){.calc__btn:active,.calc__btn--pressed{transform:none}.calc__result{transition:none}}