.tw-roi-guide {
    width: 100%;
    padding: 80px 40px;
    background: #ffffff;
    color: #202124;
}

.tw-roi-guide,
.tw-roi-guide * {
    box-sizing: border-box;
}

.tw-roi-guide__container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
}

/* Header */

.tw-roi-guide__header {
    max-width: 780px;
    margin: 0 auto 52px;
    text-align: center;
}

.tw-roi-guide__eyebrow {
    display: inline-block;
    margin-bottom: 16px;
    color: #62666b;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1.8px;
    line-height: 1.5;
    text-transform: uppercase;
}

.tw-roi-guide__title {
    margin: 0 0 20px;
    color: #171717;
    font-size: clamp(30px, 4vw, 44px);
    font-weight: 700;
    letter-spacing: -1.4px;
    line-height: 1.18;
}

.tw-roi-guide__intro {
    max-width: 720px;
    margin: 0 auto;
    color: #62666b;
    font-size: 17px;
    line-height: 1.8;
}

/* Guide Sections */

.tw-roi-guide__content {
    width: 100%;
}

.tw-roi-guide__section {
    padding: 36px 0;
    border-bottom: 1px solid #e8e8e8;
}

.tw-roi-guide__section:first-child {
    padding-top: 0;
}

.tw-roi-guide__section--last {
    padding-bottom: 0;
    border-bottom: none;
}

.tw-roi-guide__heading {
    margin: 0 0 18px;
    color: #202124;
    font-size: 25px;
    font-weight: 700;
    letter-spacing: -0.5px;
    line-height: 1.35;
}

.tw-roi-guide__section p {
    margin: 0 0 18px;
    color: #555a60;
    font-size: 16px;
    line-height: 1.85;
}

.tw-roi-guide__section p:last-child {
    margin-bottom: 0;
}

.tw-roi-guide__section strong {
    color: #252525;
    font-weight: 650;
}

/* Formula */

.tw-roi-guide__formula {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin: 28px 0;
    padding: 30px 24px;
    background: #f5f5f5;
    border: 1px solid #e8e8e8;
    border-radius: 10px;
    color: #202124;
    text-align: center;
}

.tw-roi-guide__formula-label,
.tw-roi-guide__formula-multiply {
    font-size: 23px;
    font-weight: 700;
    line-height: 1.5;
}

.tw-roi-guide__fraction {
    display: inline-flex;
    flex-direction: column;
    max-width: 100%;
    font-size: 16px;
    font-weight: 600;
    line-height: 1.6;
}

.tw-roi-guide__fraction-top {
    padding: 0 8px 9px;
    border-bottom: 2px solid #252525;
}

.tw-roi-guide__fraction-bottom {
    padding: 9px 8px 0;
}

.tw-roi-guide__note {
    padding: 16px 18px;
    background: #fafafa;
    border-left: 3px solid #333333;
    border-radius: 0 6px 6px 0;
}

/* Example Calculation */

.tw-roi-guide__example {
    margin: 26px 0;
    padding: 8px 24px;
    background: #ffffff;
    border: 1px solid #e5e5e5;
    border-radius: 10px;
}

.tw-roi-guide__example-row,
.tw-roi-guide__example-result {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 17px 0;
}

.tw-roi-guide__example-row {
    border-bottom: 1px solid #eeeeee;
}

.tw-roi-guide__example-row span,
.tw-roi-guide__example-result span {
    color: #555a60;
    font-size: 15px;
    line-height: 1.6;
}

.tw-roi-guide__example-row strong {
    color: #252525;
    font-size: 16px;
    font-weight: 650;
    text-align: right;
}

.tw-roi-guide__example-result {
    margin: 0 -24px;
    padding: 20px 24px;
    background: #f5f5f5;
    border-radius: 0 0 10px 10px;
}

.tw-roi-guide__example-result span {
    color: #202124;
    font-weight: 650;
}

.tw-roi-guide__example-result strong {
    color: #171717;
    font-size: 25px;
    font-weight: 750;
    letter-spacing: -0.5px;
}

/* ROI Interpretation */

.tw-roi-guide__interpretations {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin: 26px 0;
}

.tw-roi-guide__interpretation {
    min-width: 0;
    padding: 24px 20px;
    background: #f7f7f7;
    border: 1px solid #e9e9e9;
    border-radius: 9px;
}

.tw-roi-guide__interpretation-value {
    display: block;
    margin-bottom: 12px;
    color: #202124;
    font-size: 16px;
    font-weight: 700;
    line-height: 1.5;
}

.tw-roi-guide__interpretation p {
    margin: 0;
    color: #62666b;
    font-size: 14px;
    line-height: 1.8;
}

/* Steps */

.tw-roi-guide__steps {
    display: grid;
    gap: 16px;
    margin: 24px 0 0;
    padding-left: 25px;
    color: #555a60;
}

.tw-roi-guide__steps li {
    padding-left: 8px;
    font-size: 16px;
    line-height: 1.85;
}

.tw-roi-guide__steps li::marker {
    color: #202124;
    font-weight: 700;
}

/* ROI vs ROAS */

.tw-roi-guide__comparison {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
    margin: 26px 0;
}

.tw-roi-guide__comparison-item {
    min-width: 0;
    padding: 26px;
    background: #f7f7f7;
    border: 1px solid #e8e8e8;
    border-radius: 9px;
}

.tw-roi-guide__comparison-item h4 {
    margin: 0 0 12px;
    color: #202124;
    font-size: 20px;
    font-weight: 700;
    line-height: 1.4;
}

.tw-roi-guide__comparison-item p {
    margin: 0;
    color: #62666b;
    font-size: 15px;
    line-height: 1.85;
}

/* Tablet */

@media (max-width: 768px) {

    .tw-roi-guide {
        padding: 64px 30px;
    }

    .tw-roi-guide__header {
        margin-bottom: 40px;
    }

    .tw-roi-guide__title {
        letter-spacing: -0.8px;
    }

    .tw-roi-guide__section {
        padding: 30px 0;
    }

    .tw-roi-guide__heading {
        font-size: 23px;
    }

    .tw-roi-guide__interpretations {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .tw-roi-guide__interpretation {
        padding: 20px;
    }

    .tw-roi-guide__comparison {
        gap: 14px;
    }

    .tw-roi-guide__comparison-item {
        padding: 20px;
    }
}

/* Mobile */

@media (max-width: 480px) {

    .tw-roi-guide {
        padding: 48px 20px;
    }

    .tw-roi-guide__header {
        margin-bottom: 32px;
        text-align: left;
    }

    .tw-roi-guide__eyebrow {
        margin-bottom: 12px;
        font-size: 11px;
        letter-spacing: 1.4px;
    }

    .tw-roi-guide__title {
        margin-bottom: 16px;
        font-size: 30px;
        letter-spacing: -0.8px;
        line-height: 1.2;
    }

    .tw-roi-guide__intro {
        font-size: 15px;
        line-height: 1.8;
    }

    .tw-roi-guide__section {
        padding: 26px 0;
    }

    .tw-roi-guide__heading {
        margin-bottom: 14px;
        font-size: 21px;
        letter-spacing: -0.3px;
    }

    .tw-roi-guide__section p {
        font-size: 15px;
        line-height: 1.8;
    }

    .tw-roi-guide__formula {
        gap: 10px;
        margin: 22px 0;
        padding: 24px 14px;
    }

    .tw-roi-guide__formula-label,
    .tw-roi-guide__formula-multiply {
        font-size: 20px;
    }

    .tw-roi-guide__fraction {
        font-size: 13px;
    }

    .tw-roi-guide__fraction-top {
        padding: 0 4px 8px;
    }

    .tw-roi-guide__fraction-bottom {
        padding: 8px 4px 0;
    }

    .tw-roi-guide__example {
        margin: 22px 0;
        padding: 4px 16px;
    }

    .tw-roi-guide__example-row,
    .tw-roi-guide__example-result {
        gap: 12px;
        padding: 15px 0;
    }

    .tw-roi-guide__example-row span,
    .tw-roi-guide__example-result span {
        font-size: 14px;
    }

    .tw-roi-guide__example-row strong {
        font-size: 14px;
    }

    .tw-roi-guide__example-result {
        margin: 0 -16px;
        padding: 18px 16px;
    }

    .tw-roi-guide__example-result strong {
        font-size: 22px;
    }

    .tw-roi-guide__interpretations {
        gap: 12px;
        margin: 22px 0;
    }

    .tw-roi-guide__interpretation {
        padding: 18px;
    }

    .tw-roi-guide__interpretation-value {
        margin-bottom: 8px;
        font-size: 15px;
    }

    .tw-roi-guide__interpretation p {
        font-size: 14px;
    }

    .tw-roi-guide__steps {
        gap: 14px;
        padding-left: 22px;
    }

    .tw-roi-guide__steps li {
        padding-left: 4px;
        font-size: 14px;
        line-height: 1.8;
    }

    .tw-roi-guide__comparison {
        grid-template-columns: 1fr;
        gap: 14px;
        margin: 22px 0;
    }

    .tw-roi-guide__comparison-item {
        padding: 20px;
    }

    .tw-roi-guide__comparison-item h4 {
        font-size: 18px;
    }

    .tw-roi-guide__comparison-item p {
        font-size: 14px;
    }

    .tw-roi-guide__note {
        padding: 14px;
    }
}