.tool-form-online-calculator {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem 0 1rem;
}

.online-calc {
    --calc-bg: #eaecf3;
    --calc-text: #333;
    --calc-key-shadow:
        rgba(255, 255, 255, 0.8) 1px 1px 1px 0 inset,
        rgba(40, 49, 85, 0.3) -1px -1px 1px 0 inset,
        rgba(40, 49, 85, 0.1) 1px 1px 3px 0;
    --calc-key-fn: linear-gradient(135deg, #d9dce8, #e2e4ef);
    --calc-key-num: linear-gradient(135deg, #f4f5f6, #ffffff);
    --calc-key-ac: linear-gradient(135deg, #ffa80e, #ffc355);
    --calc-key-eq: #4f6ef2;
    --calc-mode-bg: #cfd2e0;
    --calc-mode-active: #e3e5f0;

    width: 100%;
    max-width: 560px;
    background: var(--calc-bg);
    border-radius: 16px;
    padding: 16px 16px 11px;
    box-sizing: border-box;
}

.online-calc-display {
    background: #fff;
    border-radius: 18px;
    min-height: 99px;
    padding: 0;
    margin: 3px 0 8px;
    box-sizing: border-box;
    box-shadow: rgba(40, 49, 85, 0.4) 1px 1px 1px 0 inset;
    overflow: hidden;
}

.online-calc-show-text {
    width: 100%;
    min-height: 99px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: stretch;
    box-sizing: border-box;
}

.online-calc-ans {
    position: absolute;
    top: 8px;
    right: 16px;
    font-size: 13px;
    font-weight: 400;
    color: #999;
    line-height: 1.2;
    pointer-events: none;
}

.online-calc-ans.is-hidden {
    display: none;
}

.online-calc-process {
    width: 100%;
    margin: 0;
    padding: 22px 16px 0;
    font-size: 16px;
    font-weight: 400;
    color: #333;
    text-align: right;
    line-height: 1.35;
    word-break: break-all;
    min-height: 22px;
    box-sizing: border-box;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.online-calc-process:empty,
.online-calc-process.is-hidden {
    display: none;
}

.online-calc-result-box {
    width: 100%;
    padding: 0 16px 8px;
    box-sizing: border-box;
    text-align: right;
}

.online-calc-value {
    display: inline-block;
    max-width: 100%;
    font-size: 47px;
    font-weight: 600;
    color: #333;
    text-align: right;
    line-height: 1.05;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.online-calc-func-prefix,
.online-calc-func-arg {
    color: #333;
}

.online-calc-func-suffix {
    color: #c5c9d2;
}

.online-calc-func-suffix.is-manual {
    color: #333;
}

.online-calc-keypad {
    display: flex;
    align-items: flex-start;
    width: 100%;
    gap: 2px;
}

.online-calc-func {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    flex: 0 0 42.5%;
    min-width: 0;
}

.online-calc-base {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    flex: 1;
    min-width: 0;
}

.online-calc-btn {
    border: none;
    border-radius: 16px;
    width: 100%;
    height: 54px;
    padding: 0;
    font-size: 20px;
    font-weight: 400;
    color: var(--calc-text);
    background: var(--calc-key-fn);
    box-shadow: var(--calc-key-shadow);
    cursor: pointer;
    user-select: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.online-calc-btn sup {
    font-size: 0.62em;
    line-height: 1;
}

.online-calc-btn:active {
    box-shadow:
        rgba(40, 49, 85, 0.25) 1px 1px 2px 0 inset,
        rgba(255, 255, 255, 0.5) -1px -1px 1px 0 inset;
}

.online-calc-btn--num,
.online-calc-btn--dot {
    background: var(--calc-key-num);
    font-size: 24px;
}

.online-calc-btn--sign,
.online-calc-btn--op {
    background: var(--calc-key-fn);
    font-size: 24px;
}

.online-calc-btn--fn {
    background: var(--calc-key-fn);
    font-size: 20px;
}

.online-calc-btn--ac {
    background: var(--calc-key-ac);
    color: #fff;
    font-size: 20px;
}

.online-calc-btn--eq {
    background: var(--calc-key-eq);
    color: #fff;
    font-size: 24px;
}

.online-calc-mode {
    grid-column: span 2;
    display: flex;
    align-items: center;
    width: 100%;
    height: 54px;
    padding: 0;
    border-radius: 20px;
    background: var(--calc-mode-bg);
    box-shadow:
        rgba(255, 255, 255, 0.7) -1px -1px 1px 0 inset,
        rgba(40, 49, 85, 0.4) 1px 1px 1px 0 inset,
        rgba(40, 49, 85, 0.1) 1px 1px 3px 0;
    overflow: hidden;
}

.online-calc-mode-part {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--calc-text);
    font-size: 20px;
    font-weight: 400;
    cursor: pointer;
    height: 54px;
    padding: 0;
}

.online-calc-mode-part.is-active {
    background: var(--calc-mode-active);
    border-radius: 16px;
    box-shadow: var(--calc-key-shadow);
}

.online-calc-btn.is-active-inv {
    background: var(--calc-mode-active);
}

.online-calc-btn-guide-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 0.5rem;
    font-size: 14px;
}

.online-calc-btn-guide-table th,
.online-calc-btn-guide-table td {
    border: 1px solid #e8e8e8;
    padding: 8px 10px;
    vertical-align: top;
    text-align: left;
}

.online-calc-btn-guide-table th {
    background: #fafafa;
    font-weight: 600;
}

@media screen and (max-width: 600px) {
    .online-calc {
        max-width: 100%;
        padding: 12px 10px 8px;
    }

    .online-calc-keypad {
        flex-direction: column;
        align-items: center;
    }

    .online-calc-func,
    .online-calc-base {
        width: 100%;
        max-width: 296px;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        margin-left: 0;
    }

    .online-calc-mode {
        grid-column: span 2;
        width: auto;
    }

    .online-calc-btn {
        width: 100%;
        min-width: 0;
        height: 48px;
    }

    .online-calc-mode-part,
    .online-calc-mode {
        height: 48px;
    }

    .online-calc-value {
        font-size: 36px;
    }
}

@media screen and (max-width: 360px) {
    .online-calc-func {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        max-width: 222px;
    }

    .online-calc-base {
        max-width: 296px;
    }
}