.gtec-book {
    background: #f4f7f9;
    color: var(--gtec-ink);
    font-family: "Inclusive Sans", "Inter", "Segoe UI", Arial, sans-serif;
    line-height: 1.5;
}

.gtec-book *,
.gtec-book *::before,
.gtec-book *::after {
    box-sizing: border-box;
}

.gtec-book-hero {
    min-height: 650px;
    padding: clamp(54px, 7vw, 104px) clamp(20px, 5vw, 72px);
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 480px);
    align-items: center;
    gap: clamp(32px, 5vw, 76px);
    background:
        linear-gradient(110deg, rgba(8, 54, 86, 0.98) 0%, rgba(8, 54, 86, 0.92) 48%, rgba(8, 54, 86, 0.78) 100%),
        radial-gradient(circle at 76% 18%, rgba(0, 146, 156, 0.38), transparent 30%),
        radial-gradient(circle at 18% 88%, rgba(239, 117, 35, 0.22), transparent 34%);
    color: #ffffff;
}

.gtec-book-hero__copy,
.gtec-book-section,
.gtec-book-band {
    width: min(1440px, 100%);
}

.gtec-book-hero__copy {
    justify-self: end;
    max-width: 860px;
}

.gtec-book-eyebrow {
    margin: 0 0 14px;
    color: var(--gtec-orange);
    font-size: clamp(1.08rem, 1vw, 1.35rem);
    font-weight: 950;
    letter-spacing: 0;
    text-transform: uppercase;
}

.gtec-book-hero h1 {
    max-width: 900px;
    margin: 0;
    color: #ffffff;
    font-size: clamp(3.6rem, 5.4vw, 6.9rem);
    font-weight: 950;
    line-height: 0.98;
    letter-spacing: 0;
}

.gtec-book-hero__copy > p:not(.gtec-book-eyebrow) {
    max-width: 800px;
    margin: 24px 0 0;
    color: rgba(255, 255, 255, 0.86);
    font-size: clamp(1.25rem, 1.45vw, 1.88rem);
    font-weight: 700;
    line-height: 1.46;
}

.gtec-book-actions {
    margin-top: 34px;
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.gtec-book-btn {
    display: inline-flex;
    min-height: 52px;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    padding: 0 22px;
    font-size: 1.14rem;
    font-weight: 950;
    text-decoration: none;
}

.gtec-book-btn:hover,
.gtec-book-btn:focus {
    text-decoration: none;
    transform: translateY(-1px);
}

.gtec-book-btn--primary {
    background: var(--gtec-orange);
    color: #ffffff;
    box-shadow: 0 16px 36px rgba(239, 117, 35, 0.25);
}

.gtec-book-btn--primary:hover,
.gtec-book-btn--primary:focus {
    color: #ffffff;
}

.gtec-book-btn--secondary {
    border: 1px solid rgba(255, 255, 255, 0.72);
    color: #ffffff;
    background: rgba(255, 255, 255, 0.08);
}

.gtec-book-btn--secondary:hover,
.gtec-book-btn--secondary:focus {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.14);
}

.gtec-book-cover {
    position: relative;
    justify-self: start;
    width: min(100%, 420px);
    padding: 24px;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 28px 68px rgba(0, 0, 0, 0.28);
}

.gtec-book-cover img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 6px;
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.22);
}

.gtec-book-cover__tag {
    position: absolute;
    right: 10px;
    bottom: 36px;
    max-width: 230px;
    padding: 14px 16px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.96);
    color: var(--gtec-ink);
    box-shadow: 0 18px 40px rgba(8, 54, 86, 0.24);
}

.gtec-book-cover__tag span,
.gtec-book-cover__tag strong {
    display: block;
}

.gtec-book-cover__tag span {
    color: var(--gtec-orange);
    font-size: 1.08rem;
    font-weight: 950;
    text-transform: uppercase;
}

.gtec-book-cover__tag strong {
    margin-top: 4px;
    font-size: 1rem;
    font-weight: 900;
}

.gtec-book--energy .gtec-book-hero {
    background:
        linear-gradient(110deg, rgba(8, 54, 86, 0.98) 0%, rgba(8, 54, 86, 0.91) 48%, rgba(6, 76, 78, 0.82) 100%),
        radial-gradient(circle at 76% 18%, rgba(61, 145, 93, 0.38), transparent 30%),
        radial-gradient(circle at 18% 88%, rgba(239, 117, 35, 0.26), transparent 34%);
}

.gtec-book--energy .gtec-book-grid span,
.gtec-book--energy .gtec-book-cta-grid span {
    background: rgba(61, 145, 93, 0.13);
    color: var(--gtec-green);
}

.gtec-book-section {
    margin: 0 auto;
    padding: clamp(56px, 6vw, 92px) clamp(20px, 5vw, 72px);
}

.gtec-book-section--tight {
    padding-bottom: clamp(40px, 4vw, 64px);
}

.gtec-book-intro {
    max-width: 960px;
}

.gtec-book-intro h2,
.gtec-book-band h2 {
    margin: 0;
    color: var(--gtec-ink);
    font-size: clamp(2.4rem, 3.4vw, 4.5rem);
    font-weight: 950;
    line-height: 1.05;
    letter-spacing: 0;
}

.gtec-book-intro p:not(.gtec-book-eyebrow),
.gtec-book-band p {
    max-width: 860px;
    margin: 18px 0 0;
    color: var(--gtec-muted);
    font-size: clamp(1.16rem, 1.25vw, 1.55rem);
    font-weight: 700;
    line-height: 1.48;
}

.gtec-book-grid {
    margin-top: 34px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.gtec-book-grid article {
    min-height: 250px;
    padding: 24px;
    border: 1px solid rgba(211, 223, 232, 0.95);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 18px 44px rgba(8, 54, 86, 0.08);
}

.gtec-book-grid span,
.gtec-book-cta-grid span {
    display: inline-flex;
    min-width: 42px;
    height: 36px;
    margin-bottom: 18px;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(0, 116, 184, 0.12);
    color: var(--gtec-blue);
    font-size: 1rem;
    font-weight: 950;
}

.gtec-book-grid h3 {
    margin: 0;
    color: var(--gtec-ink);
    font-size: 1.32rem;
    font-weight: 950;
    line-height: 1.16;
}

.gtec-book-grid p {
    margin: 12px 0 0;
    color: var(--gtec-muted);
    font-size: 1.02rem;
    font-weight: 650;
    line-height: 1.42;
}

.gtec-book-band {
    margin: 0 auto;
    padding: clamp(36px, 5vw, 58px) clamp(20px, 5vw, 72px);
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
    border-radius: 8px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(230, 241, 248, 0.96)),
        radial-gradient(circle at 86% 20%, rgba(239, 117, 35, 0.16), transparent 30%);
    box-shadow: 0 20px 54px rgba(8, 54, 86, 0.1);
}

.gtec-book-band .gtec-book-btn--primary {
    white-space: nowrap;
}

.gtec-book-cta-grid {
    margin-top: 34px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.gtec-book-cta-grid a {
    min-height: 170px;
    padding: 24px;
    border: 1px solid rgba(211, 223, 232, 0.95);
    border-radius: 8px;
    background: #ffffff;
    color: var(--gtec-ink);
    text-decoration: none;
    box-shadow: 0 18px 44px rgba(8, 54, 86, 0.08);
}

.gtec-book-cta-grid a:hover,
.gtec-book-cta-grid a:focus {
    border-color: var(--gtec-blue);
    color: var(--gtec-blue);
    text-decoration: none;
    transform: translateY(-1px);
}

.gtec-book-cta-grid strong {
    display: block;
    color: inherit;
    font-size: 1.34rem;
    font-weight: 950;
    line-height: 1.18;
}

@media (max-width: 1120px) {
    .gtec-book-hero,
    .gtec-book-band {
        grid-template-columns: 1fr;
    }

    .gtec-book-hero__copy,
    .gtec-book-cover {
        justify-self: start;
    }

    .gtec-book-grid,
    .gtec-book-cta-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .gtec-book-hero {
        padding: 40px 20px 54px;
    }

    .gtec-book-grid,
    .gtec-book-cta-grid {
        grid-template-columns: 1fr;
    }

    .gtec-book-grid article,
    .gtec-book-cta-grid a {
        min-height: auto;
    }

    .gtec-book-cover__tag {
        position: static;
        margin-top: 16px;
    }
}

.gtec-books-hub {
    min-height: 100vh;
}

.gtec-books-hub-hero {
    padding: clamp(64px, 8vw, 120px) clamp(20px, 5vw, 72px) clamp(44px, 6vw, 76px);
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 430px);
    align-items: center;
    gap: clamp(30px, 5vw, 74px);
    background:
        linear-gradient(125deg, rgba(8, 54, 86, 0.98), rgba(8, 54, 86, 0.88)),
        radial-gradient(circle at 84% 22%, rgba(0, 146, 156, 0.34), transparent 28%),
        radial-gradient(circle at 18% 84%, rgba(239, 117, 35, 0.2), transparent 34%);
    color: #ffffff;
}

.gtec-books-hub-hero__copy {
    width: min(980px, 100%);
    justify-self: end;
}

.gtec-books-hub-hero h1 {
    max-width: 1020px;
    margin: 0;
    color: #ffffff;
    font-size: clamp(3.2rem, 5.3vw, 6.4rem);
    font-weight: 950;
    line-height: 1.02;
    letter-spacing: 0;
}

.gtec-books-hub-hero p:not(.gtec-book-eyebrow) {
    max-width: 900px;
    margin: 22px 0 0;
    color: rgba(255, 255, 255, 0.84);
    font-size: clamp(1.22rem, 1.35vw, 1.72rem);
    font-weight: 700;
    line-height: 1.48;
}

.gtec-books-hub-hero__visual {
    position: relative;
    min-height: 430px;
    justify-self: start;
    width: min(100%, 430px);
}

.gtec-books-hub-hero__cover {
    position: absolute;
    display: block;
    width: min(68%, 270px);
    height: auto;
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 26px 72px rgba(0, 0, 0, 0.34);
}

.gtec-books-hub-hero__cover--front {
    right: 0;
    top: 16px;
    z-index: 2;
    transform: rotate(3deg);
}

.gtec-books-hub-hero__cover--back {
    left: 0;
    bottom: 8px;
    z-index: 1;
    transform: rotate(-5deg);
    opacity: 0.92;
}

.gtec-books-showcase {
    width: min(1440px, calc(100% - 40px));
    margin: clamp(36px, 5vw, 72px) auto 0;
    display: grid;
    gap: 22px;
}

.gtec-book-card {
    display: grid;
    grid-template-columns: minmax(230px, 340px) minmax(0, 1fr);
    gap: clamp(22px, 4vw, 42px);
    align-items: center;
    padding: clamp(22px, 4vw, 42px);
    border: 1px solid rgba(211, 223, 232, 0.95);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 24px 64px rgba(8, 54, 86, 0.1);
}

.gtec-book-card--featured {
    border-color: rgba(239, 117, 35, 0.34);
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 1), rgba(251, 246, 241, 0.95)),
        radial-gradient(circle at 86% 18%, rgba(239, 117, 35, 0.12), transparent 28%);
}

.gtec-book-card__cover {
    justify-self: center;
    width: min(100%, 300px);
    padding: 16px;
    border-radius: 8px;
    background: rgba(8, 54, 86, 0.06);
}

.gtec-book-card__cover img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 6px;
    box-shadow: 0 18px 44px rgba(8, 54, 86, 0.2);
}

.gtec-book-card__body h2 {
    margin: 0;
    color: var(--gtec-ink);
    font-size: clamp(2.15rem, 3.2vw, 4.1rem);
    font-weight: 950;
    line-height: 1.04;
    letter-spacing: 0;
}

.gtec-book-card__body > p:not(.gtec-book-eyebrow) {
    max-width: 860px;
    margin: 16px 0 0;
    color: var(--gtec-muted);
    font-size: clamp(1.08rem, 1.18vw, 1.48rem);
    font-weight: 700;
    line-height: 1.48;
}

.gtec-book-card__meta {
    margin-top: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.gtec-book-card__meta span {
    display: inline-flex;
    min-height: 36px;
    align-items: center;
    border-radius: 8px;
    background: rgba(0, 116, 184, 0.1);
    color: var(--gtec-blue);
    padding: 0 12px;
    font-size: 0.98rem;
    font-weight: 900;
}

.gtec-book-card__actions {
    margin-top: 26px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.gtec-book-btn--secondary-dark {
    border: 1px solid var(--gtec-navy);
    background: #ffffff;
    color: var(--gtec-navy);
}

.gtec-book-btn--secondary-dark:hover,
.gtec-book-btn--secondary-dark:focus {
    background: var(--gtec-navy);
    color: #ffffff;
}

.gtec-book-btn--text {
    min-height: 52px;
    color: var(--gtec-blue);
    background: transparent;
    padding-inline: 8px;
}

.gtec-book-btn--text:hover,
.gtec-book-btn--text:focus {
    color: var(--gtec-navy);
    text-decoration: underline;
}

.gtec-books-bridge {
    padding-top: clamp(54px, 6vw, 86px);
}

@media (max-width: 860px) {
    .gtec-books-hub-hero {
        grid-template-columns: 1fr;
    }

    .gtec-books-hub-hero__copy,
    .gtec-books-hub-hero__visual {
        justify-self: start;
    }

    .gtec-books-hub-hero__visual {
        min-height: 360px;
        width: min(100%, 390px);
    }

    .gtec-book-card {
        grid-template-columns: 1fr;
    }

    .gtec-book-card__cover {
        justify-self: start;
        max-width: 260px;
    }
}

@media (max-width: 560px) {
    .gtec-books-hub-hero__visual {
        min-height: 330px;
    }

    .gtec-books-hub-hero__cover {
        width: min(68%, 230px);
    }

    .gtec-books-showcase {
        width: min(100% - 28px, 640px);
    }

    .gtec-book-card__actions,
    .gtec-book-card__actions .gtec-book-btn {
        width: 100%;
    }
}