:root {
    --bg: #000000;
    --panel: #0d0d0d;
    --text: #f5f5f5;
    --secondary: #999999;
    --muted: #666666;
    --divider: #222222;
    --button-bg: #f3f3f3;
    --button-text: #111111;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.5;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

button {
    font: inherit;
}

.page-shell,
.site-header,
.site-footer,
.affiliate-disclosure {
    width: 100%;
    max-width: 1440px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 32px;
    padding-right: 32px;
}

.site-header {
    width: 100%;
    max-width: 1440px;
    margin-left: auto;
    margin-right: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 24px;
    padding-bottom: 24px;
    border-bottom: none;
}

.logo {
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
}

.logo img {
    width: 128px;
    height: auto;
    display: block;
}

.menu-button {
    display: block;
    width: 26px;
    height: 20px;
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    cursor: pointer;
}

.menu-button span {
    display: block;
    height: 2px;
    background: var(--text);
    margin: 4px 0;
}

.page-shell {
    width: 100%;
    max-width: 1440px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 32px;
    padding-right: 32px;
    padding-top: 38px;
    padding-bottom: 30px;
}

.hero {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.hero h1 {
    font-size: clamp(44px, 5.5vw, 78px);
    line-height: 0.95;
    letter-spacing: -2.5px;
    font-weight: 800;
    text-transform: uppercase;
    margin: 0;
    text-align: center;
}

.hero-description {
    margin: 20px auto 0;
    max-width: 1100px;
    font-size: clamp(15px, 1.45vw, 18px);
    line-height: 1.6;
    color: var(--secondary);
    text-align: center;
}

.home-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.home-page-shell {
    flex: 1;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 10px;
    padding-bottom: clamp(72px, 12vh, 140px);
}

.home-hero {
    max-width: 760px;
    padding-top: 20px;
}

.home-hero h1 {
    font-size: clamp(42px, 6vw, 78px);
}

.home-hero .hero-description {
    max-width: 570px;
    margin-top: 22px;
}

.home-cta {
    display: inline-block;
    margin-top: 32px;
    padding: 13px 17px;
    background: var(--button-bg);
    border: 1px solid #d7d7d7;
    color: var(--button-text);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.3px;
    text-transform: uppercase;
    transition: transform 0.15s ease, opacity 0.15s ease;
}

.home-cta span {
    margin-left: 8px;
}

.home-cta:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.privacy-page-shell {
    padding-top: 42px;
    padding-bottom: 54px;
}

.privacy-content {
    max-width: 780px;
    margin: 0 auto;
}

.privacy-content h1 {
    margin: 0;
    font-size: clamp(38px, 5vw, 64px);
    line-height: 1;
    letter-spacing: -1.8px;
    text-transform: uppercase;
}

.privacy-updated {
    margin-top: 14px;
    color: var(--secondary);
    font-size: 13px;
}

.privacy-content section {
    margin-top: 38px;
}

.privacy-content h2 {
    margin-bottom: 10px;
    font-size: 15px;
    line-height: 1.2;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.privacy-content p {
    color: var(--secondary);
    font-size: 16px;
    line-height: 1.75;
}

.privacy-content a,
.footer-links a {
    color: var(--text);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.privacy-content a:hover,
.footer-links a:hover {
    color: var(--secondary);
}

.books-section {
    width: 100%;
    margin-left: 0;
    margin-right: 0;
    margin-top: 50px;
}

.section-heading {
    width: 100%;
    margin-left: 0;
    margin-right: 0;
    margin-bottom: 28px;
}

.eyebrow {
    color: var(--secondary);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.section-heading h2 {
    font-size: clamp(28px, 3vw, 46px);
    line-height: 1.05;
    letter-spacing: -1.2px;
    font-weight: 700;
}

.books-grid {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 28px;
}

.book-card {
    min-width: 0;
    width: 100%;
}

.book-card-link {
    display: block;
    color: inherit;
    text-decoration: none;
}

.book-cover {
    width: 80%;
    height: 285px;
    background: transparent;
    border: none;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
}

.book-cover img {
    display: block;
    width: 145%;
    max-width: none;
    height: auto;
    flex: none;
    margin: 0;
    object-fit: contain;
    transform: translateX(-22%);
}

.book-info {
    margin-top: 4px;
}

.book-number {
    color: var(--secondary);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.4px;
    margin: 0;
}

.book-card h3 {
    margin: 6px 0 4px;
    font-size: clamp(18px, 1.5vw, 22px);
    line-height: 1.15;
    letter-spacing: -0.5px;
    font-weight: 700;
}

.book-author {
    margin: 0;
    color: var(--secondary);
    font-size: clamp(13px, 1vw, 15px);
}

.book-category {
    margin-top: 8px;
    color: var(--muted);
    font-size: 9px;
    line-height: 1.4;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: 700;
}

.amazon-link {
    display: inline-block;
    margin-top: 12px;
    padding: 9px 12px;
    background: var(--button-bg);
    border: 1px solid #d7d7d7;
    color: var(--button-text);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.3px;
    text-transform: uppercase;
    text-decoration: none;
    transition: transform 0.15s ease, opacity 0.15s ease;
}

.amazon-button {
    margin-top: 12px;
}

.amazon-link:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.book-page-shell {
    padding-top: 24px;
    padding-bottom: 30px;
}

.book-page {
    max-width: 1200px;
    margin: 0 auto;
}

.back-link {
    display: inline-block;
    margin-bottom: 28px;
    color: var(--secondary);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1.3px;
    text-transform: uppercase;
}

.book-detail {
    display: grid;
    grid-template-columns: minmax(280px, 430px) minmax(0, 1fr);
    gap: 70px;
    align-items: start;
}

.book-detail-cover {
    width: 100%;
    max-width: 430px;
    height: 500px;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
}

.book-detail-cover img {
    display: block;
    width: 145%;
    max-width: none;
    height: auto;
    margin: 0;
    object-fit: contain;
    transform: translateX(-22%);
}

.book-detail-content {
    padding-top: 18px;
}

.book-detail-content .eyebrow {
    margin-bottom: 12px;
    color: var(--secondary);
}

.book-detail-content h1 {
    margin: 0;
    font-size: clamp(36px, 4vw, 64px);
    line-height: 0.98;
    letter-spacing: -2px;
    text-transform: uppercase;
}

.book-detail-author {
    margin: 16px 0 22px;
    color: var(--secondary);
    font-size: 18px;
}

.book-detail-content h2 {
    margin: 0 0 12px;
    color: var(--text);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.book-recommendation {
    max-width: 720px;
    margin: 0 0 24px;
    color: var(--text);
    font-size: 18px;
    line-height: 1.7;
}

.book-amazon-link {
    margin-top: 0;
}

.affiliate-disclosure {
    border-top: 1px solid var(--divider);
    margin-top: 26px;
    padding-top: 20px;
    padding-bottom: 20px;
    color: var(--secondary);
    font-size: 12px;
    line-height: 1.5;
}

.site-footer {
    border-top: 1px solid var(--divider);
    padding-top: 26px;
    padding-bottom: 40px;
    color: var(--secondary);
    font-size: 12px;
    letter-spacing: 1px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: auto auto;
    align-items: flex-end;
    gap: 20px;
}

.footer-text {
    flex: 1;
    grid-column: 1;
    grid-row: 1 / span 2;
}

.footer-links {
    grid-column: 2;
    grid-row: 2;
    margin-top: 12px;
    text-align: right;
    color: var(--secondary);
    font-size: 11px;
    letter-spacing: 1px;
    white-space: nowrap;
}

.site-footer p + p {
    margin-top: 8px;
}

.footer-socials {
    grid-column: 2;
    grid-row: 1;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    margin-left: 0;
}

.social-link {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--divider);
    border-radius: 50%;
    color: var(--text);
    background: rgba(255, 255, 255, 0.02);
    transition: transform 0.15s ease, opacity 0.15s ease, border-color 0.15s ease;
}

.social-link img {
    width: 18px;
    height: 18px;
    display: block;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.social-link:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    border-color: var(--secondary);
}

.menu-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    background: #000000;
    color: var(--text);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-12px);
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
}

.menu-overlay.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
}

.menu-overlay-header {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 30px 40px 0;
}

.menu-wordmark {
    color: var(--text);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 2px;
}

.menu-close {
    width: 34px;
    height: 34px;
    padding: 0;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text);
    font-size: 29px;
    line-height: 1;
    cursor: pointer;
}

.menu-overlay-nav {
    width: 100%;
    max-width: 1400px;
    margin: 54px auto 0;
    padding: 0 40px 50px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.menu-overlay-nav a {
    width: fit-content;
    color: var(--text);
    font-size: clamp(42px, 5vw, 68px);
    font-weight: 700;
    letter-spacing: 1px;
    line-height: 1;
    text-transform: uppercase;
    transition: color 0.2s ease, opacity 0.2s ease;
}

.menu-overlay-nav a:nth-of-type(3) {
    font-size: clamp(20px, 2vw, 26px);
    letter-spacing: 2px;
}

.menu-overlay-nav a:nth-of-type(n + 4) {
    font-size: clamp(16px, 1.3vw, 18px);
    letter-spacing: 2px;
}

.menu-overlay-nav a:hover,
.menu-overlay-nav a:focus-visible {
    color: var(--secondary);
}

.menu-overlay-divider {
    width: min(560px, 100%);
    height: 1px;
    margin: 14px 0 4px;
    background: var(--divider);
}

.menu-overlay-divider:nth-of-type(2) {
    display: none;
}

@media (max-width: 760px) {
    .menu-overlay-header {
        padding: 24px 20px 0;
    }

    .menu-overlay-nav {
        gap: 8px;
        margin-top: 42px;
        padding: 0 20px 35px;
    }

    .menu-wordmark {
        font-size: 14px;
    }

    .menu-close {
        width: 32px;
        height: 32px;
        font-size: 27px;
    }

    .menu-overlay-nav a {
        font-size: clamp(32px, 9vw, 48px);
    }

    .menu-overlay-nav a:nth-of-type(3) {
        font-size: clamp(17px, 4.5vw, 20px);
    }

    .menu-overlay-nav a:nth-of-type(n + 4) {
        font-size: clamp(15px, 4vw, 17px);
    }
}

@media (max-width: 1200px) {
    .books-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 28px 28px;
    }

    .book-cover {
        height: 255px;
    }
}

@media (max-width: 760px) {
    .page-shell,
    .site-header,
    .site-footer,
    .affiliate-disclosure {
        padding-left: 18px;
        padding-right: 18px;
    }

    .site-header {
        padding-top: 20px;
        padding-bottom: 20px;
    }

    .site-footer {
        position: relative;
        display: flex;
        flex-direction: row;
        align-items: flex-start;
        justify-content: space-between;
        gap: 20px;
        min-height: 100px;
    }

    .footer-text {
        flex: 1;
        min-width: 0;
        padding-right: 140px;
        text-align: left;
    }

    .footer-links {
        position: absolute;
        top: 60px;
        right: 18px;
        margin-top: 10px;
        text-align: right;
        align-self: flex-end;
    }

    .footer-socials {
        position: absolute;
        top: 26px;
        right: 18px;
        width: auto;
        flex-direction: row;
        align-items: center;
        justify-content: flex-end;
        margin-left: 0;
        margin: 0;
    }

    .logo img {
        width: 104px;
    }

    .menu-button {
        display: block;
        width: 24px;
        height: 18px;
    }

    .page-shell {
        padding-top: 32px;
    }

    .hero-description {
        margin-top: 18px;
        max-width: 360px;
        font-size: 14px;
        line-height: 1.6;
        text-align: center;
    }

    .home-page-shell {
        padding-top: 12px;
        padding-bottom: 64px;
    }

    .home-hero {
        padding-top: 18px;
    }

    .home-hero .hero-description {
        margin-top: 18px;
    }

    .home-cta {
        margin-top: 28px;
        padding: 12px 14px;
        font-size: 10px;
    }

    .privacy-page-shell {
        padding-top: 32px;
        padding-bottom: 42px;
    }

    .privacy-content section {
        margin-top: 30px;
    }

    .privacy-content p {
        font-size: 15px;
        line-height: 1.65;
    }

    .books-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 24px 14px;
    }

    .books-section {
        margin-top: 30px;
    }

    .section-heading {
        margin-bottom: 22px;
    }

    .book-cover {
        height: 195px;
        overflow: hidden;
    }

    .book-cover img {
        width: 145%;
        max-width: none;
        transform: translateX(-22%);
    }

    .book-info {
        margin-top: 8px;
    }

    .book-number {
        font-size: 10px;
    }

    .book-card h3 {
        margin-top: 5px;
        font-size: 16px;
    }

    .book-author {
        font-size: 12px;
    }

    .book-category {
        margin-top: 7px;
        font-size: 8px;
    }

    .amazon-link {
        margin-top: 10px;
        padding: 8px 10px;
        font-size: 9px;
        letter-spacing: 1px;
    }
}

@media (max-width: 760px) {
    .book-detail {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .book-detail-cover {
        width: 100%;
        max-width: 300px;
        height: 380px;
        overflow: hidden;
    }

    .book-detail-cover img {
        width: 145%;
        max-width: none;
        transform: translateX(-22%);
    }

    .book-detail-content {
        padding-top: 0;
    }

    .book-recommendation {
        font-size: 16px;
    }
}

@media (max-width: 520px) {
    .hero h1 {
        font-size: clamp(38px, 12vw, 48px);
        letter-spacing: -1.8px;
        line-height: 0.98;
    }

    .section-heading h2 {
        font-size: 28px;
    }

    .back-link {
        margin-bottom: 20px;
    }

    .book-detail-content h1 {
        font-size: 32px;
    }

    .book-detail-author {
        margin-top: 12px;
        margin-bottom: 18px;
        font-size: 16px;
    }

    .book-recommendation {
        font-size: 15px;
        line-height: 1.6;
    }
}