.homepage-calculator {
    max-width: 560px;
    width: 100%;
    margin: 0 auto;
    box-sizing: border-box;
    padding: 22px;
    border: 1px solid #dfe3e7;
    border-radius: 14px;
    background-color: #f8f9fb;
    box-shadow: 0 18px 42px -34px rgba(28, 37, 46, .55);
}

.homepage-calculator *,
.homepage-calculator *::before,
.homepage-calculator *::after {
    box-sizing: border-box;
}

.calculator-form {
    width: 100%;
}

.calculator-display-wrap {
    position: relative;
    margin-bottom: 14px;
}

.calculator-display {
    display: block;
    width: 100%;
    height: 66px;
    padding: 10px 18px;
    border: 1px solid #d9dee3;
    border-radius: 9px;
    background-color: #fff;
    color: #222c38;
    font-family: inherit;
    font-size: 30px;
    font-weight: 900;
    line-height: 44px;
    letter-spacing: 0.01rem;
    text-align: right;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .8);
    transition: border-color .2s ease, box-shadow .2s ease, background-color .2s ease;
}

.calculator-display::placeholder {
    color: #a2a8ae;
}

.calculator-display:focus,
.calculator-display:active {
    border-color: rgba(255, 72, 91, .5);
    background-color: #fff;
    box-shadow: 0 0 0 3px rgba(255, 72, 91, .12);
}

.calculator-buttons {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.calculator-key {
    min-width: 0;
    height: 50px;
    padding: 0 10px;
    border: 1px solid #dfe3e7;
    border-radius: 8px;
    background-color: #fff;
    color: #273340;
    font-family: inherit;
    font-size: 15px;
    font-weight: 900;
    line-height: 1;
    cursor: pointer;
    text-align: center;
    transition: background-color .2s ease, border-color .2s ease, color .2s ease, transform .15s ease, box-shadow .2s ease;
}

.calculator-key:hover {
    border-color: rgba(255, 72, 91, .42);
    color: var(--color-accent, #ff485b);
    box-shadow: 0 10px 22px -18px rgba(28, 37, 46, .45);
}

.calculator-key:active {
    transform: translateY(1px);
    box-shadow: none;
}

.calculator-key:focus {
    outline: none;
}

.calculator-key:focus-visible {
    border-color: var(--color-accent, #ff485b);
    box-shadow: 0 0 0 3px rgba(255, 72, 91, .14);
}

.calculator-key--operator {
    border-color: #434850;
    background-color: #434850;
    color: #fff;
}

.calculator-key--operator:hover {
    border-color: var(--color-accent, #ff485b);
    background-color: var(--color-accent, #ff485b);
    color: #fff;
}

.calculator-key--equal {
    border-color: var(--color-accent, #ff485b);
    background-color: var(--color-accent, #ff485b);
    color: #fff;
}

.calculator-key--equal:hover {
    border-color: var(--color-accent-dark, #e73b50);
    background-color: var(--color-accent-dark, #e73b50);
    color: #fff;
}

.calculator-key--clear {
    grid-column: span 2;
    border-color: rgba(255, 72, 91, .35);
    background-color: rgba(255, 72, 91, .08);
    color: var(--color-accent, #ff485b);
}

.calculator-key--clear:hover {
    border-color: var(--color-accent, #ff485b);
    background-color: var(--color-accent, #ff485b);
    color: #fff;
}

.calculator-key--muted {
    grid-column: span 2;
    background-color: #f4f5f7;
    color: #667482;
}

.calculator-key--muted:hover {
    border-color: #cfd6dd;
    background-color: #eef1f4;
    color: #2f3b46;
}

.calculator-card-content {
    display: flex;
    justify-content: center;
    width: 100%;
}

/* =========================
   ADVANCED CLASSIC CALCULATOR
   ========================= */

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

.homepage-calculator--classic-advanced .calculator-display-wrap {
    position: relative;
    margin-bottom: 14px;
}

.homepage-calculator--classic-advanced .calculator-memory-indicator {
    position: absolute;
    top: 50%;
    left: 16px;
    transform: translateY(-50%);
    z-index: 2;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 22px;
    height: 22px;
    padding: 0 7px;
    border-radius: 999px;
    background-color: rgba(255, 72, 91, .1);
    color: var(--color-accent, #ff485b);
    font-size: 11px;
    font-weight: 900;
    line-height: 1;
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s ease, visibility .2s ease;
    pointer-events: none;
}

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

.homepage-calculator--classic-advanced .calculator-display {
    height: 72px;
    padding-left: 48px;
    font-size: 32px;
    font-weight: 900;
    line-height: 48px;
}

.calculator-buttons--classic-advanced {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 10px;
}

.calculator-buttons--classic-advanced .calculator-key {
    min-height: 50px;
    height: 50px;
    padding: 0 9px;
    font-size: 14px;
}

.homepage-calculator--classic-advanced .calculator-key--memory,
.homepage-calculator--classic-advanced .calculator-key--function {
    border-color: #dfe3e7;
    background-color: #f4f5f7;
    color: #667482;
}

.homepage-calculator--classic-advanced .calculator-key--memory:hover,
.homepage-calculator--classic-advanced .calculator-key--function:hover {
    border-color: rgba(255, 72, 91, .42);
    background-color: rgba(255, 72, 91, .08);
    color: var(--color-accent, #ff485b);
}

.homepage-calculator--classic-advanced .calculator-key--danger {
    border-color: rgba(255, 72, 91, .35);
    background-color: rgba(255, 72, 91, .08);
    color: var(--color-accent, #ff485b);
}

.homepage-calculator--classic-advanced .calculator-key--danger:hover {
    border-color: var(--color-accent, #ff485b);
    background-color: var(--color-accent, #ff485b);
    color: #fff;
}

.homepage-calculator--classic-advanced .calculator-key--operator {
    border-color: #434850;
    background-color: #434850;
    color: #fff;
}

.homepage-calculator--classic-advanced .calculator-key--operator:hover {
    border-color: var(--color-accent, #ff485b);
    background-color: var(--color-accent, #ff485b);
    color: #fff;
}

.homepage-calculator--classic-advanced .calculator-key--equal {
    border-color: var(--color-accent, #ff485b);
    background-color: var(--color-accent, #ff485b);
    color: #fff;
}

.homepage-calculator--classic-advanced .calculator-key--equal:hover {
    border-color: var(--color-accent-dark, #e73b50);
    background-color: var(--color-accent-dark, #e73b50);
    color: #fff;
}

.homepage-calculator--classic-advanced .calculator-key--tall {
    grid-row: span 2;
    height: auto;
    min-height: 110px;
}

/* ===== MOBILE / TABLET ADAPTIVE FOR ADVANCED CLASSIC ===== */

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

    .homepage-calculator--classic-advanced .calculator-display {
        height: 62px;
        padding-left: 44px;
        font-size: 26px;
        line-height: 42px;
    }

    .homepage-calculator--classic-advanced .calculator-memory-indicator {
        left: 14px;
        min-width: 20px;
        height: 20px;
        font-size: 10px;
    }

    .calculator-buttons--classic-advanced {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        grid-template-areas:
            "mc mr mminus mplus"
            "sqrt mu sign percent"
            "seven eight nine divide"
            "four five six multiply"
            "one two three minus"
            "ac c back plus"
            "zero zerozero dot equals";
        gap: 8px;
    }

    .calculator-buttons--classic-advanced .calculator-key {
        min-height: 46px;
        height: 46px;
        border-radius: 7px;
        font-size: 13px;
        padding: 0 7px;
    }

    .homepage-calculator--classic-advanced .calculator-key--tall {
        grid-row: auto;
        min-height: 46px;
        height: 46px;
    }

    .calc-cell--mc { grid-area: mc; }
    .calc-cell--mr { grid-area: mr; }
    .calc-cell--mminus { grid-area: mminus; }
    .calc-cell--mplus { grid-area: mplus; }

    .calc-cell--sqrt { grid-area: sqrt; }
    .calc-cell--mu { grid-area: mu; }
    .calc-cell--sign { grid-area: sign; }
    .calc-cell--percent { grid-area: percent; }

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

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

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

    .calc-cell--ac { grid-area: ac; }
    .calc-cell--c { grid-area: c; }
    .calc-cell--back { grid-area: back; }
    .calc-cell--plus { grid-area: plus; }

    .calc-cell--zero { grid-area: zero; }
    .calc-cell--doublezero { grid-area: zerozero; }
    .calc-cell--dot { grid-area: dot; }
    .calc-cell--equals { grid-area: equals; }
}

@media (max-width: 575px) {
    .homepage-calculator {
        max-width: 100%;
        padding: 14px;
        border-radius: 11px;
    }

    .calculator-display-wrap {
        margin-bottom: 12px;
    }

    .calculator-buttons {
        gap: 8px;
    }

    .calculator-key {
        height: 46px;
        border-radius: 7px;
        font-size: 14px;
        padding: 0 8px;
    }

    .calculator-display {
        height: 58px;
        padding: 9px 16px;
        font-size: 23px;
        line-height: 38px;
    }
}

@media (max-width: 420px) {
    .calculator-buttons--classic-advanced {
        gap: 7px;
    }

    .calculator-buttons--classic-advanced .calculator-key {
        min-height: 43px;
        height: 43px;
        font-size: 12px;
        padding: 0 5px;
    }

    .homepage-calculator--classic-advanced .calculator-display {
        height: 58px;
        font-size: 22px;
        line-height: 38px;
    }
}