.cio-ebook-product {
    --cio-blue: #0b3b82;
    --cio-light-blue: #eef6ff;
    --cio-accent: #1683e2;
    --cio-yellow: #ffd54f;
    --cio-green: #16803c;
    --cio-red: #c62828;
    --cio-text: #1f2937;
    --cio-border: #dbe4ee;

    box-sizing: border-box;
    max-width: 900px;
    margin: 0 auto;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--cio-text);
    line-height: 1.7;
}

.cio-ebook-product *,
.cio-ebook-product *::before,
.cio-ebook-product *::after {
    box-sizing: border-box;
}

.cio-ebook-product h1,
.cio-ebook-product h2,
.cio-ebook-product h3 {
    font-family: Arial, Helvetica, sans-serif;
}

.cio-ebook-title {
    color: var(--cio-blue);
    font-size: clamp(28px, 5vw, 38px);
    line-height: 1.15;
    margin: 0 0 18px;
}

.cio-ebook-product h2 {
    color: var(--cio-blue);
    font-size: clamp(23px, 4vw, 28px);
    line-height: 1.25;
    margin: 38px 0 15px;
}

.cio-ebook-product h3 {
    color: var(--cio-accent);
    font-size: 21px;
    line-height: 1.35;
    margin: 26px 0 10px;
}

.cio-ebook-product p {
    margin: 0 0 16px;
}

.cio-lead {
    font-size: 18px;
}

.cio-callout {
    padding: 20px 22px;
    border-radius: 10px;
    margin: 26px 0;
}

.cio-callout-blue {
    background: var(--cio-light-blue);
    border-left: 5px solid var(--cio-accent);
}

.cio-callout h2 {
    margin-top: 0;
}

.cio-method {
    background: #fff8dc;
    color: var(--cio-blue);
    padding: 20px;
    margin: 26px 0;
    border-radius: 10px;
    text-align: center;
    font-size: 21px;
    font-weight: 700;
}

.cio-method span {
    color: var(--cio-accent);
    padding: 0 4px;
}

.cio-example-box {
    background: #f8fafc;
    border: 1px solid var(--cio-border);
    padding: 18px 20px;
    border-radius: 9px;
    margin: 18px 0;
}

.cio-example-box p:last-child {
    margin-bottom: 0;
}

.cio-mini-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin: 16px 0 22px;
}

.cio-mini-list span {
    display: block;
    background: #f8fafc;
    border: 1px solid var(--cio-border);
    border-radius: 8px;
    padding: 10px 13px;
}

.cio-error,
.cio-correct {
    padding: 16px 18px;
    border-radius: 9px;
    margin: 14px 0;
}

.cio-error {
    background: #fff1f1;
    color: #5d1b1b;
}

.cio-error strong,
.cio-error span,
.cio-red {
    color: var(--cio-red);
}

.cio-error span,
.cio-correct span {
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
    font-weight: 700;
}

.cio-correct {
    background: #effaf1;
    color: #164b2c;
}

.cio-correct strong,
.cio-correct span,
.cio-green {
    color: var(--cio-green);
}

.cio-checklist {
    padding-left: 0;
    list-style: none;
    margin: 18px 0;
}

.cio-checklist li {
    position: relative;
    padding: 7px 0 7px 30px;
}

.cio-checklist li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 7px;
    color: var(--cio-green);
    font-weight: 700;
}

.cio-color-legend {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 18px 0;
}

.cio-color-legend > div {
    padding: 14px 16px;
    border-radius: 8px;
    font-weight: 700;
}

.cio-color-legend .cio-red {
    background: #fff1f1;
}

.cio-color-legend .cio-green {
    background: #effaf1;
}

.cio-steps {
    display: grid;
    gap: 12px;
    margin: 18px 0;
}

.cio-steps > div {
    position: relative;
    padding: 16px 18px 16px 62px;
    border: 1px solid var(--cio-border);
    border-radius: 10px;
    background: #fff;
}

.cio-steps span {
    position: absolute;
    left: 16px;
    top: 16px;
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--cio-accent);
    color: #fff;
    font-weight: 700;
}

.cio-steps p {
    margin: 3px 0 0;
}

.cio-center {
    text-align: center;
}

.cio-final-message {
    font-size: 20px;
    font-weight: 700;
    color: var(--cio-blue);
    margin: 30px 0 !important;
}

.cio-offer {
    background: var(--cio-blue);
    color: #fff;
    padding: 30px 24px;
    border-radius: 14px;
    text-align: center;
    margin-top: 38px;
}

.cio-offer h2 {
    color: #fff;
    margin-top: 0;
}

.cio-price {
    color: var(--cio-yellow);
    font-size: 34px;
    font-weight: 800;
    margin: 16px 0;
}

.cio-cta-wrap {
    margin: 24px 0 14px !important;
}

.cio-cta {
    display: inline-block;
    background: var(--cio-yellow);
    color: #0b2f68 !important;
    padding: 14px 25px;
    border-radius: 8px;
    text-decoration: none !important;
    font-weight: 800;
    line-height: 1.2;
    transition: transform .2s ease, opacity .2s ease;
}

.cio-cta:hover {
    transform: translateY(-1px);
    opacity: .94;
}

.cio-offer-last {
    margin-bottom: 0 !important;
}

@media (max-width: 680px) {
    .cio-ebook-product {
        font-size: 16px;
    }

    .cio-mini-list,
    .cio-color-legend {
        grid-template-columns: 1fr;
    }

    .cio-method {
        font-size: 18px;
    }

    .cio-offer {
        padding: 25px 18px;
    }
}