/* ===== How-To Instruction Block ===== */
.seo-calc__howto {
    padding: 64px 0;
    background: var(--calc-bg);
}

.seo-calc__howto-intro {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px 24px;
    background: linear-gradient(135deg, rgba(5, 150, 105, 0.06), rgba(99, 102, 241, 0.04));
    border: 1px solid rgba(5, 150, 105, 0.15);
    border-radius: var(--calc-radius);
    margin-bottom: 40px;
}

.seo-calc__howto-intro-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--calc-primary), var(--calc-primary-light));
    border-radius: 10px;
    color: #fff;
}

.seo-calc__howto-intro p {
    margin: 0;
    font-size: 15px;
    line-height: 1.7;
    color: var(--calc-text-secondary);
}

.seo-calc__howto-intro p strong {
    color: var(--calc-text);
}

/* Steps */
.seo-calc__howto-steps {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
    margin-bottom: 32px;
}

.seo-calc__howto-step {
    display: flex;
    gap: 20px;
    padding: 24px 0;
    position: relative;
    border-bottom: 1px solid var(--calc-border);
    transition: var(--calc-transition);
}

.seo-calc__howto-step:first-child {
    padding-top: 0;
}

.seo-calc__howto-step:last-child {
    border-bottom: none;
}

.seo-calc__howto-step:hover {
    padding-left: 8px;
}

/* Step number */
.seo-calc__howto-num {
    flex-shrink: 0;
    position: relative;
}

.seo-calc__howto-num span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--calc-dark) 0%, var(--calc-dark-mid) 100%);
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
    position: relative;
    z-index: 1;
}

/* Connecting line between steps */
.seo-calc__howto-step:not(:last-child) .seo-calc__howto-num::after {
    content: '';
    position: absolute;
    top: 44px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: calc(100% + 4px);
    background: linear-gradient(180deg, var(--calc-dark-light), var(--calc-border));
}

/* Highlighted step */
.seo-calc__howto-step--highlight {
    background: linear-gradient(135deg, rgba(5, 150, 105, 0.04), rgba(16, 185, 129, 0.02));
    border-radius: var(--calc-radius);
    padding-left: 20px !important;
    padding-right: 20px;
    margin: 8px -20px;
    border-bottom-color: transparent;
}

.seo-calc__howto-step--highlight .seo-calc__howto-num span {
    background: linear-gradient(135deg, var(--calc-primary) 0%, var(--calc-primary-light) 100%);
    box-shadow: 0 4px 16px rgba(5, 150, 105, 0.3);
}

/* Final step */
.seo-calc__howto-step--final .seo-calc__howto-num span {
    background: linear-gradient(135deg, #059669 0%, #818cf8 100%);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

/* Step body */
.seo-calc__howto-body {
    flex: 1;
    min-width: 0;
}

.seo-calc__howto-body h3 {
    margin: 0 0 6px;
    font-size: 17px;
    font-weight: 700;
    color: var(--calc-text);
    line-height: 1.4;
}

.seo-calc__howto-body p {
    margin: 0;
    font-size: 15px;
    line-height: 1.7;
    color: var(--calc-text-secondary);
}

.seo-calc__howto-body p strong {
    color: var(--calc-text);
    font-weight: 600;
}

.seo-calc__howto-optional {
    font-weight: 400;
    font-size: 14px;
    color: var(--calc-text-secondary);
}

/* Metrics chips */
.seo-calc__howto-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
}

.seo-calc__howto-metric {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--calc-white);
    border: 1px solid rgba(5, 150, 105, 0.2);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 600;
    color: var(--calc-primary);
}

.seo-calc__howto-metric svg {
    color: var(--calc-primary);
}

/* Bottom note */
.seo-calc__howto-note {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px 24px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.06), rgba(139, 92, 246, 0.04));
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: var(--calc-radius);
    border-left: 4px solid #059669;
}

.seo-calc__howto-note-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #059669, #818cf8);
    border-radius: 10px;
    color: #fff;
}

.seo-calc__howto-note-text {
    font-size: 15px;
    line-height: 1.7;
    color: var(--calc-text-secondary);
}

.seo-calc__howto-note-text strong {
    color: var(--calc-text);
    display: block;
    margin-bottom: 4px;
    font-size: 15px;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .seo-calc__howto {
        padding: 48px 0;
    }

    .seo-calc__howto-intro {
        flex-direction: column;
        gap: 12px;
    }

    .seo-calc__howto-step {
        gap: 14px;
        padding: 20px 0;
    }

    .seo-calc__howto-num span {
        width: 36px;
        height: 36px;
        font-size: 14px;
        border-radius: 10px;
    }

    .seo-calc__howto-step:not(:last-child) .seo-calc__howto-num::after {
        top: 36px;
    }

    .seo-calc__howto-step--highlight {
        padding-left: 14px !important;
        padding-right: 14px;
        margin: 4px -14px;
    }

    .seo-calc__howto-body h3 {
        font-size: 15px;
    }

    .seo-calc__howto-body p {
        font-size: 14px;
    }

    .seo-calc__howto-metrics {
        gap: 8px;
    }

    .seo-calc__howto-metric {
        padding: 5px 12px;
        font-size: 13px;
    }

    .seo-calc__howto-note {
        flex-direction: column;
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .seo-calc__howto-step {
        gap: 12px;
        padding: 16px 0;
    }

    .seo-calc__howto-num span {
        width: 32px;
        height: 32px;
        font-size: 13px;
        border-radius: 8px;
    }

    .seo-calc__howto-step:not(:last-child) .seo-calc__howto-num::after {
        top: 32px;
    }

    .seo-calc__howto-metrics {
        gap: 6px;
    }

    .seo-calc__howto-metric {
        padding: 4px 10px;
        font-size: 12px;
        gap: 4px;
    }

    .seo-calc__howto-metric svg {
        width: 14px;
        height: 14px;
    }
}