body{
    font-family: 'Roboto Slab', serif;
}

.roi-card {
    max-width: 1000px;
    margin: 0 auto;
    background: linear-gradient(135deg, #f0f4ff 0%, #e0ebff 100%);
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 4rem;
    flex-wrap: wrap;
    padding: 3rem;
}

.roi-left {
    flex: 1;
    min-width: 300px;
}

.roi-left label {
    display: block;
    font-weight: 600;
    margin-bottom: 5px;
    margin-top: 15px;
}

.roi-left input,
.roi-left select {
    width: 80%;
    padding: 13px 12px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-weight: 400;
    font-size: 1rem;
    font-family: "Roboto Slab", serif;
}

.roi-type-radio {
    display: flex;
    gap: 15px;
    margin-bottom: 10px;
    margin-top: 5px;
}

.roi-type-radio .container {
    display: inline-block;
    position: relative;
    padding-left: 30px;
    margin-right: 30px;
    cursor: pointer;
    font-weight: 400;
    user-select: none;
}

.roi-type-radio .container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.roi-type-radio .checkmark {
    position: absolute;
    top: 2px;
    left: 0;
    height: 23px;
    width: 23px;
    background-color: #fff;
    border: 1px solid #000;
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

.roi-type-radio .container input:checked~.checkmark {
    background-color: #0F2BC9;
}

.roi-type-radio .checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.roi-type-radio .container input:checked~.checkmark:after {
    display: block;
}

.roi-type-radio .container .checkmark:after {
    top: 4px;
    left: 4px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: white;
}

.input-suffix-roi {
    position: relative;
    display: inline-block;
    width: 80%;
}

.input-suffix-roi input {
    width: 100%;
    padding-right: 30px;
    box-sizing: border-box;
}

.input-suffix-roi .suffix {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: #827f7f;
    font-weight: bold;
}

.roi-left .calculate-btn {
    margin-top: 20px;
    padding: 1rem 3rem;
    background: linear-gradient(135deg, #0F2BC9 0%, #667eea 100%);
    width: 80%;
    text-transform: uppercase;
    color: #fff;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    font-family: "Roboto Slab", serif;
    cursor: pointer;
    transition: background 0.3s ease;
}

.roi-left .calculate-btn:hover {
    transform: translateY(1px);
}

/* Chart Container */
.roi-chart-container {
    max-width: 250px;
    margin: 120px auto;
    text-align: center;
}

.roi-chart-legend {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.roi-chart-legend div {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 400;
    font-size: 1rem;
}

.roi-chart-legend .dot {
    height: 15px;
    width: 15px;
    border-radius: 50%;
    display: inline-block;
}

.dot-principal {
    background-color: #a8cfff;
    /* Soft blue */
}

.dot-profit {
    background-color: #28a745;
    /* Vibrant green */
}

.dot-total {
    background-color: #d3d3d3;
    /* Subtle gray */
}

/* Result Card */
.roi-result-card {
    max-width: 900px;
    margin: 2rem auto 0 auto;
    background: #ffffff;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 1.5rem 2rem;
}

.roi-summary {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    width: 100%;
    flex-wrap: wrap;
}

.roi-summary-next-row {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    margin: 1rem 0 0 0;
}

.result-box {
    background: linear-gradient(135deg, #f0f4ff 0%, #e0ebff 100%);
    border-radius: 15px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 120px;
    min-width: 180px;
    flex: 1;
    max-width: 250px;
}

.result-box .result-value {
    font-size: 1.6rem;
    font-weight: 500;
    font-family: "Roboto Slab", serif;
    color: #0a750ada;
    margin-bottom: 0.5rem;
}

.result-box .result-label {
    font-weight: 500;
    color: #555;
    font-family: "Roboto Slab", serif;
    font-size: 1.1rem;
}

.roi-left input[type=number]::-webkit-outer-spin-button,
.roi-left input[type=number]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.roi-left input[type=number] {
    -moz-appearance: textfield;
}

.formula-block-roi {
    font-weight: bold;
    font-size: 1.1rem;
    background: #f0f4ff;
    width: auto;
    padding: 10px;
    border-radius: 8px;
    margin: 10px 0;
}

/***** Media Queries *****/
@media (max-width: 991px) {
    .roi-card {
        max-width: 900px;
        gap: 2rem;
        flex-wrap: wrap;
        padding: 3rem;
    }

    #roiChart {
        max-width: 250px;
    }
}

@media (max-width: 768px) {
    .roi-card {
        max-width: 560px;
        gap: 2rem;
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        justify-content: center;
        padding: 3rem;
    }

    .roi-left input,
    .roi-left select {
        width: 100%;
        padding: 13px 12px;
        font-size: 1rem;
    }

    .input-suffix-roi {
        position: relative;
        display: inline-block;
        width: 100%;
    }

    #roiChart {
        max-width: 240px;
    }

    .roi-chart-container {
        max-width: 250px;
        margin: 20px auto;
        text-align: center;
    }

    .roi-result-card {
        max-width: 400px;
        margin: 2rem auto 0 auto;
        padding: 1.5rem 2rem;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }

    .roi-summary {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }

    .roi-summary-next-row {
        margin-left: 0;
        justify-content: center;
    }

    .roi-left .calculate-btn {
        width: 100%;
    }

}

@media (max-width: 617px) {
    .roi-card {
        max-width: 460px;
        gap: 1rem;
        flex-direction: column;
        flex-wrap: nowrap;
        align-items: center;
        justify-content: center;
        padding: 2rem;
    }

    .roi-left input,
    .roi-left select {
        width: 100%;
        padding: 13px 12px;
        font-size: 1rem;
    }

    .input-suffix-roi {
        position: relative;
        display: inline-block;
        width: 100%;
    }

    #roiChart {
        max-width: 210px;
    }

    .roi-chart-container {
        max-width: 250px;
        margin: 20px auto;
        text-align: center;
    }

    .roi-result-card {
        max-width: 350px;
        margin: 2rem auto 0 auto;
        padding: 1.5rem 2rem;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }

    .roi-summary {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }

    .roi-summary-next-row {
        margin-left: 0;
        justify-content: center;
    }

    .roi-left .calculate-btn {
        width: 100%;
    }

    .roi-summary h5,
    .roi-summary-next-row h5 {
        font-size: 1rem;
    }

    .roi-summary .result-value,
    .roi-summary-next-row .result-value {
        font-size: 1.15rem;
    }
}

@media (max-width: 450px) {
    .roi-card {
        max-width: 380px;
        gap: 1rem;
        flex-direction: column;
        flex-wrap: nowrap;
        align-items: center;
        justify-content: center;
        padding: 2rem;
    }

    .roi-left input,
    .roi-left select {
        width: 100%;
        padding: 13px 12px;
        font-size: 1rem;
    }

    .input-suffix-roi {
        position: relative;
        display: inline-block;
        width: 100%;
    }

    #roiChart {
        max-width: 210px;
    }

    .roi-chart-container {
        max-width: 250px;
        margin: 20px auto;
        text-align: center;
    }

    .roi-result-card {
        max-width: 350px;
        margin: 2rem auto 0 auto;
        padding: 1.5rem 2rem;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }

    .roi-summary {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }

    .roi-summary-next-row {
        margin-left: 0;
        justify-content: center;
    }

    .roi-left .calculate-btn {
        width: 100%;
    }

    .formula-block-roi {
        font-weight: bold;
        font-size: 0.95rem;
    }

    .roi-chart-legend div {
        display: flex;
        font-size: 0.9rem;
    }

    .roi-summary h5,
    .roi-summary-next-row h5 {
        font-size: 0.95rem;
    }

    .roi-summary .result-value,
    .roi-summary-next-row .result-value {
        font-size: 1rem;
    }
}

@media (max-width: 365px) {
    .roi-card {
        max-width: 340px;
        gap: 1rem;
        flex-direction: column;
        flex-wrap: nowrap;
        overflow: hidden;
        align-items: center;
        justify-content: center;
        padding: 2rem;
    }

    .roi-left input,
    .roi-left select {
        width: 100%;
        padding: 13px 12px;
        font-size: 1rem;
    }

    .input-suffix-roi {
        position: relative;
        display: inline-block;
        width: 100%;
    }

    #roiChart {
        max-width: 190px;
    }

    .roi-chart-container {
        max-width: 250px;
        margin: 20px auto;
        text-align: center;
    }

    .roi-result-card {
        max-width: 320px;
        margin: 2rem auto 0 auto;
        padding: 1.5rem 2rem;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }

    .roi-summary {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }

    .roi-summary-next-row {
        margin-left: 0;
        justify-content: center;
    }

    .roi-left .calculate-btn {
        width: 100%;
    }

    .formula-block-roi {
        font-weight: bold;
        font-size: 0.85rem;
    }
}