.homepage-calculator--engineering {
    max-width: 560px;
}

.homepage-calculator--engineering .calculator-display-wrap {
    position: relative;
}

.homepage-calculator--engineering .calculator-memory-indicator {
    position: absolute;
    top: 50%;
    left: 14px;
    transform: translateY(-50%);
    font-size: 12px;
    font-weight: 700;
    color: #5f6af5;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease-in-out;
    pointer-events: none;
}

.homepage-calculator--engineering .calculator-memory-indicator.is-visible {
    opacity: 1;
    visibility: visible;
}

.homepage-calculator--engineering .calculator-display {
    height: 68px;
    padding-left: 36px;
    font-size: 32px;
    font-weight: 700;
}

.calculator-toolbar {
    display: flex;
    justify-content: flex-start;
    margin-bottom: 12px;
}

.calculator-mode-switch {
    display: inline-flex;
    gap: 8px;
}

.calculator-mode-button {
    height: 36px;
    padding: 0 14px;
    border: 1px solid #eee;
    border-radius: 5px;
    background-color: #fff;
    color: #555;
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
}

.calculator-mode-button:hover {
    background-color: rgba(72, 85, 104, 0.07);
}

.calculator-mode-button:focus {
    outline: none;
    box-shadow: none;
}

.calculator-mode-button.is-active {
    background-color: #5f6af5;
    border-color: #5f6af5;
    color: #fff;
}

.engineering-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 12px;
}

.homepage-calculator--engineering .calculator-key {
    min-height: 50px;
    height: 50px;
    padding: 0 10px;
    font-size: 15px;
}

.homepage-calculator--engineering .calculator-key--memory,
.homepage-calculator--engineering .calculator-key--function {
    background-color: rgba(95, 106, 245, 0.08);
    border-color: rgba(95, 106, 245, 0.15);
    color: #5f6af5;
}

.homepage-calculator--engineering .calculator-key--memory:hover,
.homepage-calculator--engineering .calculator-key--function:hover {
    background-color: #5f6af5;
    border-color: #5f6af5;
    color: #fff;
}

.homepage-calculator--engineering .calculator-key--operator {
    background-color: #5f6af5;
    border-color: #5f6af5;
    color: #fff;
}

.homepage-calculator--engineering .calculator-key--operator:hover {
    background-color: #fff;
    color: #5f6af5;
    border-color: #5f6af5;
}

.homepage-calculator--engineering .calculator-key--equal {
    background-color: #2bbb93;
    border-color: #2bbb93;
    color: #fff;
}

.homepage-calculator--engineering .calculator-key--equal:hover {
    background-color: #25a984;
    border-color: #25a984;
    color: #fff;
}

.homepage-calculator--engineering .calculator-key--danger {
    background-color: #ff4f7f;
    border-color: #ff4f7f;
    color: #fff;
}

.homepage-calculator--engineering .calculator-key--danger:hover {
    background-color: #fff;
    color: #ff4f7f;
    border-color: #ff4f7f;
}

@media (max-width: 767px) {
    .homepage-calculator--engineering {
        max-width: 100%;
    }

    .homepage-calculator--engineering .calculator-display {
        height: 60px;
        font-size: 26px;
    }

    .engineering-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        grid-template-areas:
            "abs x2 sqrt e"
            "percent lpar rpar mplus"
            "xpow yroot ln lg"
            "logy mr mc back"
            "ctg atg acos asin"
            "pi tg cos sin"
            "seven eight nine divide"
            "four five six multiply"
            "one two three minus"
            "zero doublezero dot plus"
            "clear clear equals equals";
        gap: 10px;
    }

    .homepage-calculator--engineering .calculator-key {
        min-height: 46px;
        height: 46px;
        font-size: 14px;
        padding: 0 8px;
    }

    .eng-cell--abs { grid-area: abs; }
    .eng-cell--x2 { grid-area: x2; }
    .eng-cell--sqrt { grid-area: sqrt; }
    .eng-cell--e { grid-area: e; }

    .eng-cell--percent { grid-area: percent; }
    .eng-cell--lpar { grid-area: lpar; }
    .eng-cell--rpar { grid-area: rpar; }
    .eng-cell--mplus { grid-area: mplus; }

    .eng-cell--xpow { grid-area: xpow; }
    .eng-cell--yroot { grid-area: yroot; }
    .eng-cell--ln { grid-area: ln; }
    .eng-cell--lg { grid-area: lg; }

    .eng-cell--logy { grid-area: logy; }
    .eng-cell--mr { grid-area: mr; }
    .eng-cell--mc { grid-area: mc; }
    .eng-cell--back { grid-area: back; }

    .eng-cell--ctg { grid-area: ctg; }
    .eng-cell--atg { grid-area: atg; }
    .eng-cell--acos { grid-area: acos; }
    .eng-cell--asin { grid-area: asin; }

    .eng-cell--pi { grid-area: pi; }
    .eng-cell--tg { grid-area: tg; }
    .eng-cell--cos { grid-area: cos; }
    .eng-cell--sin { grid-area: sin; }

    .eng-cell--seven { grid-area: seven; }
    .eng-cell--eight { grid-area: eight; }
    .eng-cell--nine { grid-area: nine; }
    .eng-cell--divide { grid-area: divide; }

    .eng-cell--four { grid-area: four; }
    .eng-cell--five { grid-area: five; }
    .eng-cell--six { grid-area: six; }
    .eng-cell--multiply { grid-area: multiply; }

    .eng-cell--one { grid-area: one; }
    .eng-cell--two { grid-area: two; }
    .eng-cell--three { grid-area: three; }
    .eng-cell--minus { grid-area: minus; }

    .eng-cell--zero { grid-area: zero; }
    .eng-cell--doublezero { grid-area: doublezero; }
    .eng-cell--dot { grid-area: dot; }
    .eng-cell--plus { grid-area: plus; }

    .eng-cell--clear { grid-area: clear; }
    .eng-cell--equals { grid-area: equals; }
}

@media (max-width: 420px) {
    .engineering-grid {
        gap: 8px;
    }

    .homepage-calculator--engineering .calculator-key {
        min-height: 44px;
        height: 44px;
        font-size: 13px;
        padding: 0 6px;
    }

    .homepage-calculator--engineering .calculator-display {
        height: 56px;
        font-size: 22px;
    }

    .calculator-mode-button {
        height: 34px;
        font-size: 12px;
        padding: 0 12px;
    }
}