.ebook-page {
    position: relative;
    padding: calc(var(--navbar-height) + 2.5rem) 0 4rem;
    background:
        radial-gradient(circle at top left, rgba(19, 50, 188, 0.12), transparent 34%),
        radial-gradient(circle at right 20%, rgba(5, 150, 105, 0.12), transparent 24%),
        linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
}

.ebook-shell {
    width: min(1180px, calc(100% - 2rem));
    margin: 0 auto;
}

.ebook-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 360px);
    gap: 1.5rem;
    align-items: stretch;
    margin-bottom: 1.5rem;
}

.ebook-hero-copy,
.ebook-cover-card,
.ebook-card {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: 28px;
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
}

.ebook-hero-copy {
    padding: 2rem;
}

.ebook-kicker,
.ebook-overline {
    margin: 0 0 0.75rem;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-disc-c);
}

.ebook-hero-copy h1 {
    margin: 0 0 1rem;
    font-size: clamp(2.4rem, 5vw, 4.3rem);
    line-height: 0.96;
    color: #0f172a;
}

.ebook-lead {
    margin: 0;
    font-size: 1.12rem;
    line-height: 1.72;
    color: #334155;
    max-width: 58ch;
}

.ebook-hero-points {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
    margin-top: 1.5rem;
}

.ebook-hero-points span {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0.55rem 0.9rem;
    border-radius: 999px;
    background: rgba(19, 50, 188, 0.08);
    color: #17317f;
    font-size: 0.92rem;
    font-weight: 700;
}

.ebook-cover-card {
    padding: 1.2rem;
}

.ebook-cover-card img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 22px;
    box-shadow: 0 20px 50px rgba(15, 23, 42, 0.2);
}

.ebook-cover-meta {
    margin: 1rem 0 0;
    text-align: center;
    color: #475569;
    font-size: 0.92rem;
}

.ebook-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(300px, 360px);
    gap: 1.5rem;
}

.ebook-main,
.ebook-side {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.ebook-card {
    padding: 1.6rem;
}

.ebook-card h2 {
    margin: 0 0 0.9rem;
    font-size: 1.55rem;
    line-height: 1.15;
    color: #0f172a;
}

.ebook-card h3 {
    margin: 0 0 0.75rem;
    font-size: 1rem;
    line-height: 1.3;
    color: #102554;
}

.ebook-card p {
    margin: 0 0 1rem;
    line-height: 1.7;
    color: #334155;
}

.ebook-card p:last-child {
    margin-bottom: 0;
}

.ebook-columns {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.ebook-list {
    margin: 0;
    padding-left: 1.2rem;
    color: #334155;
}

.ebook-list li {
    margin-bottom: 0.7rem;
    line-height: 1.6;
}

.ebook-list.compact li:last-child,
.ebook-list li:last-child {
    margin-bottom: 0;
}

.ebook-topic-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.ebook-topic-grid article {
    padding: 1rem;
    border-radius: 22px;
    background: linear-gradient(180deg, rgba(248, 250, 252, 0.92), rgba(255, 255, 255, 0.98));
    border: 1px solid rgba(15, 23, 42, 0.08);
}

.ebook-quote {
    margin: 0;
    padding-left: 1rem;
    border-left: 4px solid var(--color-disc-s);
    font-size: 1.2rem;
    line-height: 1.55;
    color: #0f172a;
}

.ebook-quote-caption {
    margin-top: 1rem;
}

.ebook-faq-list {
    display: grid;
    gap: 0.95rem;
}

.ebook-faq-item {
    padding: 1rem 1rem 0.2rem;
    border-radius: 20px;
    background: rgba(248, 250, 252, 0.88);
    border: 1px solid rgba(15, 23, 42, 0.08);
}

.ebook-capture-card {
    position: sticky;
    top: calc(var(--navbar-height) + 1rem);
}

.ebook-side-copy {
    margin-bottom: 1rem;
}

.ebook-capture-form {
    display: grid;
    gap: 0.65rem;
}

.ebook-capture-form label {
    font-weight: 700;
    color: #0f172a;
}

.ebook-form-error {
    margin-top: -0.2rem;
    color: #b42318;
    font-size: 0.88rem;
    font-weight: 600;
}

.ebook-form-note {
    margin-top: 0.2rem;
    font-size: 0.88rem;
    color: #64748b;
}

.ebook-unlocked {
    display: grid;
    gap: 0.65rem;
}

.ebook-unlocked-badge {
    margin: 0 0 0.4rem;
    display: inline-flex;
    width: fit-content;
    padding: 0.45rem 0.8rem;
    border-radius: 999px;
    background: rgba(5, 150, 105, 0.12);
    color: #0f6b4e;
    font-size: 0.84rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.ebook-download-btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    min-height: 54px;
    padding: 0.8rem 1rem;
    border-radius: 18px;
    border: 1px solid transparent;
    text-decoration: none;
    font-weight: 800;
    transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.ebook-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 30px rgba(15, 23, 42, 0.08);
}

.ebook-download-pdf {
    background: rgba(220, 38, 38, 0.08);
    border-color: rgba(220, 38, 38, 0.22);
    color: #b42318;
}

.ebook-download-epub {
    background: rgba(5, 150, 105, 0.08);
    border-color: rgba(5, 150, 105, 0.22);
    color: #0f6b4e;
}

.ebook-download-mobi {
    background: rgba(217, 119, 6, 0.1);
    border-color: rgba(217, 119, 6, 0.24);
    color: #9a5b08;
}

.ebook-format-note {
    margin: -0.1rem 0 0.2rem;
    font-size: 0.85rem;
    color: #64748b;
}

.ebook-meta-panel {
    display: grid;
    gap: 0.7rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(15, 23, 42, 0.08);
}

.ebook-meta-panel div {
    display: grid;
    gap: 0.1rem;
}

.ebook-meta-panel strong {
    color: #0f172a;
    font-size: 0.88rem;
}

.ebook-meta-panel span {
    color: #475569;
    font-size: 0.92rem;
}

.ebook-eval-card .btn-btos-secondary {
    justify-content: center;
}

@media (max-width: 980px) {
    .ebook-hero,
    .ebook-grid,
    .ebook-columns,
    .ebook-topic-grid {
        grid-template-columns: 1fr;
    }

    .ebook-capture-card {
        position: static;
    }
}

@media (max-width: 640px) {
    .ebook-page {
        padding-top: calc(var(--navbar-height) + 1.6rem);
    }

    .ebook-shell {
        width: min(100% - 1rem, 1000px);
    }

    .ebook-hero-copy,
    .ebook-card,
    .ebook-cover-card {
        padding: 1.2rem;
        border-radius: 22px;
    }

    .ebook-hero-copy h1 {
        font-size: 2.4rem;
    }
}