.main-container{max-width:1400px;margin:0 auto;padding:40px 20px}.page-title{font-family:var(--calc-font-headline);color:var(--calc-text-primary);margin:0 0 .5rem;font-size:clamp(1.6rem,4vw,2.4rem)}.page-subtitle{color:var(--calc-text-faded);max-width:60ch;margin:0 0 1.5rem;line-height:1.55}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.sci-layout{grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);align-items:start;gap:1.25rem;display:grid}.sci-calc{background:var(--calc-bg-card);border:1px solid var(--calc-border-default);border-radius:var(--calc-radius-lg);padding:1rem}.sci-controls{flex-wrap:wrap;align-items:center;gap:.6rem;margin-bottom:.85rem;display:flex}.seg{border:1px solid var(--calc-border-strong);border-radius:var(--calc-radius-md);display:inline-flex;overflow:hidden}.seg-btn{appearance:none;color:var(--calc-text-faded);font-family:var(--calc-font-mono);letter-spacing:.04em;cursor:pointer;background:0 0;border:none;padding:.45rem .7rem;font-size:.8rem;transition:background .15s,color .15s}.seg-btn+.seg-btn{border-left:1px solid var(--calc-border-strong)}.seg-btn:hover{color:var(--calc-text-primary)}.seg-btn.is-active{background:var(--calc-cyan);color:#06202a}.sci-toggle{appearance:none;border:1px solid var(--calc-border-strong);border-radius:var(--calc-radius-md);color:var(--calc-text-faded);font-family:var(--calc-font-mono);cursor:pointer;background:0 0;padding:.45rem .8rem;font-size:.8rem;transition:background .15s,color .15s,border-color .15s}.sci-toggle[aria-pressed=true]{background:var(--calc-purple);border-color:var(--calc-purple);color:#fff}.sci-prec{color:var(--calc-text-dim);font-size:.78rem;font-family:var(--calc-font-mono);align-items:center;gap:.4rem;display:inline-flex}.sci-prec select{background:var(--calc-bg-input);border:1px solid var(--calc-border-strong);border-radius:var(--calc-radius-sm,8px);color:var(--calc-text-primary);font-family:var(--calc-font-mono);cursor:pointer;padding:.3rem .4rem}.sci-badge{font-family:var(--calc-font-mono);letter-spacing:.08em;background:var(--calc-bg-glass);border:1px solid var(--calc-border-default);color:var(--calc-cyan);border-radius:999px;margin-left:auto;padding:.3rem .55rem;font-size:.72rem}.sci-badge--mem{color:var(--calc-purple);margin-left:0}.sci-display{background:var(--calc-bg-input);border:1px solid var(--calc-border-strong);border-radius:var(--calc-radius-md);text-align:right;margin-bottom:.85rem;padding:.9rem 1rem;overflow:hidden}.sci-expr{font-family:var(--calc-font-mono);color:var(--calc-text-faded);white-space:nowrap;word-break:keep-all;min-height:1.4rem;font-size:1rem;overflow-x:auto}.result-value{font-family:var(--calc-font-mono);color:var(--calc-cyan);white-space:nowrap;margin:.15rem 0 .2rem;font-size:clamp(1.8rem,6vw,2.8rem);line-height:1.1;overflow-x:auto}.result-value.is-error{color:var(--calc-rose)}.result-detail{color:var(--calc-text-dim);text-align:right;font-size:.78rem;line-height:1.4}.sci-keys{flex-direction:column;gap:.5rem;display:flex}.keypad{gap:.45rem;display:grid}.keypad--mem,.keypad--fn{grid-template-columns:repeat(5,1fr)}.keypad--num{grid-template-columns:repeat(4,1fr)}.key{appearance:none;border:1px solid var(--calc-border-default);border-radius:var(--calc-radius-md);background:var(--calc-bg-card-elevated);color:var(--calc-text-primary);font-family:var(--calc-font-mono);cursor:pointer;user-select:none;min-height:2.9rem;padding:.7rem .3rem;font-size:1.05rem;transition:background .12s,border-color .12s,transform 40ms}.key:hover{border-color:var(--calc-cyan)}.key:active{transform:translateY(1px)}.key:focus-visible{outline:2px solid var(--calc-cyan);outline-offset:1px}.key-num{background:var(--calc-bg-card-elevated);font-size:1.2rem}.key-fn,.key-mem{background:var(--calc-bg-glass);color:var(--calc-text-faded);font-size:.92rem}.key-mem{min-height:2.2rem;padding:.4rem .2rem;font-size:.82rem}.key-fn--accent{color:var(--calc-purple)}.key-op,.key-op2{background:var(--calc-bg-glass);color:var(--calc-cyan);font-size:1.2rem}.key-back{background:var(--calc-bg-glass);color:var(--calc-text-faded);font-size:1.1rem}.key-clear{background:var(--calc-bg-glass);color:var(--calc-rose);font-weight:600}.key-clear:hover{border-color:var(--calc-rose)}.key-equals{appearance:none;border:1px solid var(--calc-cyan);border-radius:var(--calc-radius-md);background:var(--calc-cyan);color:#06202a;font-family:var(--calc-font-mono);cursor:pointer;padding:.8rem;font-size:1.3rem;font-weight:700;transition:filter .12s,transform 40ms}.key-equals:hover{filter:brightness(1.08)}.key-equals:active{transform:translateY(1px)}.key-equals:disabled{background:var(--calc-bg-glass);border-color:var(--calc-border-default);color:var(--calc-text-dim);cursor:not-allowed}.key-inv2 .fn-i,.sci-keys.is-inv .key-inv2 .fn-p{display:none}.sci-keys.is-inv .key-inv2 .fn-i{display:inline}.sci-history{background:var(--calc-bg-card);border:1px solid var(--calc-border-default);border-radius:var(--calc-radius-lg);flex-direction:column;max-height:640px;padding:1rem;display:flex}.sci-history__head{justify-content:space-between;align-items:center;gap:.5rem;margin-bottom:.6rem;display:flex}.card-title{font-family:var(--calc-font-headline);text-transform:uppercase;letter-spacing:.05em;color:var(--calc-text-faded);margin:0;font-size:.95rem}.sci-history__actions{gap:.35rem;display:flex}.hist-btn{appearance:none;border:1px solid var(--calc-border-strong);border-radius:var(--calc-radius-sm,8px);color:var(--calc-text-faded);font-family:var(--calc-font-mono);cursor:pointer;background:0 0;padding:.3rem .55rem;font-size:.74rem;transition:background .15s,color .15s,border-color .15s}.hist-btn:hover{color:var(--calc-text-primary);border-color:var(--calc-cyan)}.hist-btn--danger:hover{color:var(--calc-rose);border-color:var(--calc-rose)}.sci-history__list{flex:1;margin:0;padding:0;list-style:none;overflow-y:auto}.hist-item{border-bottom:1px solid var(--calc-border-subtle);cursor:pointer;text-align:right;padding:.55rem .3rem;transition:background .12s}.hist-item:hover{background:var(--calc-bg-glass)}.hist-item__expr{font-family:var(--calc-font-mono);color:var(--calc-text-dim);white-space:nowrap;font-size:.82rem;overflow-x:auto}.hist-item__result{font-family:var(--calc-font-mono);color:var(--calc-cyan);font-size:1.05rem}.hist-item__result:before{content:"= ";color:var(--calc-text-dim)}.sci-history__empty{color:var(--calc-text-dim);text-align:center;margin:1.5rem 0 0;font-size:.82rem}.sci-history__empty kbd{font-family:var(--calc-font-mono);background:var(--calc-bg-glass);border:1px solid var(--calc-border-default);border-radius:4px;padding:0 .3rem}@media (width<=900px){.sci-layout{grid-template-columns:1fr}.sci-history{max-height:360px}}@media (width<=480px){.main-container{padding:24px 12px}.key{min-height:2.7rem;padding:.6rem .2rem;font-size:.98rem}.key-fn,.key-mem{font-size:.8rem}}[data-theme=light] .sci-calc,[data-theme=light] .sci-history{background:#fff;border-color:#0000001f;box-shadow:0 1px 4px #0000000f}[data-theme=light] .sci-display{background:#f0f4f9;border-color:#00000026}[data-theme=light] .key{color:#0f172a;background:#edf2f9;border-color:#0000001a}[data-theme=light] .key-num{background:#f6f8fc}[data-theme=light] .key-fn,[data-theme=light] .key-mem,[data-theme=light] .key-op,[data-theme=light] .key-op2,[data-theme=light] .key-back,[data-theme=light] .key-clear{background:#e7edf5}[data-theme=light] .key-op,[data-theme=light] .key-op2{color:var(--calc-cyan-accessible)}[data-theme=light] .key-clear{color:var(--calc-rose)}[data-theme=light] .key-fn--accent{color:var(--calc-purple-accessible)}[data-theme=light] .key:hover{border-color:var(--calc-cyan-accessible)}[data-theme=light] .seg-btn.is-active{background:var(--calc-cyan-accessible);color:#fff}[data-theme=light] .sci-toggle[aria-pressed=true]{background:var(--calc-purple-accessible);border-color:var(--calc-purple-accessible)}[data-theme=light] .result-value{color:var(--calc-cyan-accessible)}[data-theme=light] .result-value.is-error{color:var(--calc-rose)}[data-theme=light] .sci-badge{color:var(--calc-cyan-accessible);background:#eef4f7;border-color:#0000001a}[data-theme=light] .sci-badge--mem{color:var(--calc-purple-accessible)}[data-theme=light] .key-equals{background:var(--calc-cyan-accessible);border-color:var(--calc-cyan-accessible);color:#fff}[data-theme=light] .key-equals:disabled{color:#94a3b8;background:#e7edf5;border-color:#0000001a}[data-theme=light] .hist-item:hover{background:#f0f4f9}[data-theme=light] .hist-item__result{color:#0891b2}[data-theme=light] .hist-btn{border-color:#00000026}[data-theme=light] .sci-prec select{color:#0f172a;background:#f0f4f9;border-color:#00000026}