.homepage-calculator {
    max-width: 420px;
    width: 100%;
}

.calculator-form {
    width: 100%;
}

.calculator-display {
    height: 58px;
    padding: 8px 15px;
    border: 1px solid #eee;
    border-radius: 5px;
    background-color: #fff;
    color: #484d54;
    font-family: inherit;
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 0.02rem;
    text-align: right;
}

.calculator-display::placeholder {
    color: #999;
}

.calculator-display:focus,
.calculator-display:active {
    border-color: #eee;
    box-shadow: none;
}

.calculator-buttons {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.calculator-key {
    height: 48px;
    padding: 0 12px;
    border: 1px solid #eee;
    border-radius: 5px;
    background-color: #fff;
    color: #555;
    font-family: inherit;
    font-size: 16px;
    font-weight: 500;
    line-height: 1;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
}

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

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

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

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

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

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

.calculator-key--clear {
    grid-column: span 2;
    background-color: #ff4f7f;
    border-color: #ff4f7f;
    color: #fff;
}

.calculator-key--clear:hover {
    background-color: #fff;
    color: #ff4f7f;
    border-color: #ff4f7f;
}

.calculator-key--muted {
    grid-column: span 2;
    color: #777;
}

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

@media (max-width: 575px) {
    .homepage-calculator {
        max-width: 100%;
    }

    .calculator-buttons {
        gap: 10px;
    }

    .calculator-key {
        height: 46px;
        font-size: 15px;
    }

    .calculator-display {
        font-size: 22px;
    }
}

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

.homepage-calculator--classic-advanced {
    max-width: 520px;
}

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

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

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

.calculator-buttons--classic-advanced {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 12px;
}

.calculator-buttons--classic-advanced .calculator-key {
    min-height: 50px;
    height: 50px;
    padding: 0 10px;
    font-size: 15px;
}

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

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

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

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

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

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

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

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

.homepage-calculator--classic-advanced .calculator-key--tall {
    grid-row: span 2;
    height: auto;
    min-height: 112px;
}

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

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

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

    .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: 10px;
    }

    .calculator-buttons--classic-advanced .calculator-key {
        min-height: 46px;
        height: 46px;
        font-size: 14px;
        padding: 0 8px;
    }

    .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: 420px) {
    .calculator-buttons--classic-advanced {
        gap: 8px;
    }

    .calculator-buttons--classic-advanced .calculator-key {
        min-height: 44px;
        height: 44px;
        font-size: 13px;
        padding: 0 6px;
    }

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