:root {
    --bg: #ffffff;
    --bg-soft: #f5f4f0;
    --text: #20201d;
    --muted: #6a6861;
    --line: #ddd9d0;
    --button: #20201d;
    --button-text: #ffffff;
    --shell: 72rem;
    --reading: 46rem;
    --radius: 0.25rem;
    --space-1: 0.5rem;
    --space-2: 0.75rem;
    --space-3: 1rem;
    --space-4: 1.5rem;
    --space-5: 2rem;
    --space-6: 3rem;
    --space-7: 4.5rem;
    --space-8: 6rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.0625rem;
    line-height: 1.7;
    text-rendering: optimizeLegibility;
}

img {
    display: block;
    width: 100%;
    height: auto;
}

a {
    color: inherit;
}

button,
input,
select,
textarea,
audio {
    font: inherit;
}

.shell {
    width: min(calc(100% - 2rem), var(--shell));
    margin-inline: auto;
}

.site-header {
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.98);
}

.site-header__inner {
    min-height: 4.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
}

.site-title {
    max-width: 24rem;
    font-size: 1rem;
    line-height: 1.25;
    font-weight: 700;
    text-decoration: none;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.9375rem;
}

.site-nav a {
    text-decoration: none;
    text-underline-offset: 0.25em;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a[aria-current="page"] {
    text-decoration: underline;
}

.section {
    padding-block: var(--space-8);
    border-bottom: 1px solid var(--line);
}

.section--hero {
    padding-top: var(--space-7);
}

.hero,
.split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: clamp(2.5rem, 6vw, 6rem);
}

.hero__content {
    max-width: 34rem;
}

.eyebrow {
    margin: 0 0 var(--space-4);
    color: var(--muted);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1,
h2 {
    margin-top: 0;
    font-weight: 400;
    line-height: 1.08;
    text-wrap: balance;
}

h1 {
    margin-bottom: var(--space-4);
    font-size: clamp(2.7rem, 6vw, 5.6rem);
    letter-spacing: -0.035em;
}

h2 {
    margin-bottom: var(--space-4);
    font-size: clamp(2rem, 4vw, 3.4rem);
    letter-spacing: -0.025em;
}

.subtitle {
    margin: 0 0 var(--space-5);
    color: var(--muted);
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    line-height: 1.45;
}

.lead,
.prose--large {
    font-size: clamp(1.2rem, 2vw, 1.45rem);
    line-height: 1.65;
}

.lead {
    margin: 0;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-5);
}

.button {
    display: inline-flex;
    min-height: 2.85rem;
    align-items: center;
    justify-content: center;
    padding: 0.7rem 1.05rem;
    border: 1px solid var(--button);
    border-radius: var(--radius);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.9375rem;
    font-weight: 700;
    line-height: 1;
    text-decoration: none;
}

.button--primary {
    background: var(--button);
    color: var(--button-text);
}

.button--secondary {
    background: transparent;
    color: var(--text);
}

.button:hover,
.button:focus-visible {
    text-decoration: underline;
    text-underline-offset: 0.2em;
}

.figure,
.hero__media {
    margin: 0;
}

.figure img,
.hero__media img {
    background: var(--bg-soft);
}

.figure figcaption {
    margin-top: var(--space-2);
    color: var(--muted);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.8125rem;
    line-height: 1.4;
}

.figure--contained {
    width: min(100%, 30rem);
}

.figure--book {
    width: min(100%, 31rem);
    justify-self: center;
}

.prose {
    max-width: var(--reading);
}

.prose p {
    margin-top: 0;
    margin-bottom: var(--space-4);
}

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

.section--expression {
    background: var(--bg-soft);
}

.section-heading {
    max-width: var(--reading);
    margin-bottom: var(--space-6);
}

.section-heading p {
    margin: 0;
    font-size: 1.15rem;
}

.passage {
    max-width: 58rem;
    padding-block: var(--space-5);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.passage blockquote {
    margin: 0;
    padding: 0;
    font-size: clamp(1.15rem, 2vw, 1.4rem);
    line-height: 1.6;
}

.passage blockquote + blockquote {
    margin-top: var(--space-5);
}

.passage p {
    margin: 0;
}

.attribution {
    margin-top: var(--space-4) !important;
    color: var(--muted);
    font-size: 0.95rem;
}

.figure--wide {
    width: min(100%, 44rem);
    margin-top: var(--space-6);
}

.audio-piece {
    max-width: 38rem;
    margin-top: var(--space-5);
    padding-top: var(--space-4);
    border-top: 1px solid var(--line);
}

.audio-piece:last-child {
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--line);
}

.audio-piece__label {
    margin: 0 0 var(--space-3);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1.4;
}

.audio-piece audio {
    display: block;
    width: 100%;
}

.section--closing {
    border-bottom: 0;
}

.closing {
    max-width: 46rem;
    text-align: center;
}

.closing p {
    margin: 0 auto;
    max-width: 40rem;
}

.actions--center {
    justify-content: center;
}

.site-footer {
    border-top: 1px solid var(--line);
}

.site-footer__inner {
    min-height: 5rem;
    display: flex;
    align-items: center;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.875rem;
}

.site-footer a {
    text-underline-offset: 0.2em;
}


/* Créditos */
.credits {
    padding-top: var(--space-7);
}

.credits__shell {
    max-width: 58rem;
}

.credits h1 {
    margin-bottom: var(--space-6);
    font-size: clamp(2.6rem, 5vw, 4.6rem);
}

.credits__authorship {
    max-width: var(--reading);
    margin-bottom: var(--space-7);
}

.credits__authorship h2,
.credits__area h2,
.credits__colophon h2 {
    margin-bottom: var(--space-4);
    font-size: 1.45rem;
    letter-spacing: 0;
}

.credits__authors {
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 1.12rem;
    line-height: 1.6;
}

.credits__authors li + li {
    margin-top: var(--space-1);
}

.credits__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-7) var(--space-6);
    align-items: start;
}

.credits__area {
    min-width: 0;
}

.credit-list {
    margin: 0;
}

.credit-item + .credit-item {
    margin-top: var(--space-4);
}

.credit-item dt {
    margin: 0 0 0.2rem;
    color: var(--muted);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.8rem;
    font-weight: 400;
    line-height: 1.4;
}

.credit-item dd {
    margin: 0;
    font-size: 1rem;
    line-height: 1.55;
}

.credits__colophon {
    max-width: var(--reading);
}

.credits__colophon p {
    margin-top: 0;
    margin-bottom: var(--space-3);
}

.credits__contact {
    margin-top: var(--space-6);
}

.credits__contact a {
    text-underline-offset: 0.2em;
}

@media (max-width: 760px) {

    .credits__grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .credits h1 {
        font-size: clamp(2.5rem, 13vw, 4rem);
    }

    :root {
        --space-7: 3.5rem;
        --space-8: 4.5rem;
    }

    .shell {
        width: min(calc(100% - 1.5rem), var(--shell));
    }

    .site-header__inner {
        padding-block: var(--space-3);
        align-items: flex-start;
        flex-direction: column;
        gap: var(--space-3);
    }

    .site-nav {
        width: 100%;
        justify-content: space-between;
        gap: var(--space-3);
    }

    .hero,
    .split {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .hero__content {
        max-width: none;
    }

    .hero__media {
        order: 2;
    }

    .split--media-first .figure {
        order: 2;
    }

    h1 {
        font-size: clamp(2.6rem, 14vw, 4.5rem);
    }

    .figure--contained,
    .figure--book,
    .figure--wide {
        width: 100%;
    }

    .actions {
        align-items: stretch;
        flex-direction: column;
    }

    .button {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

/* Compra */
.purchase-page {
    padding-top: var(--space-7);
}

.purchase-shell {
    max-width: 52rem;
}

.purchase-intro {
    max-width: var(--reading);
    margin-bottom: var(--space-7);
}

.purchase-intro h1 {
    font-size: clamp(2.6rem, 5vw, 4.8rem);
}

.purchase-form {
    max-width: 50rem;
}

.purchase-fields {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4) var(--space-5);
    margin: 0;
    padding: 0 0 var(--space-7);
    border: 0;
}

.purchase-fields legend {
    grid-column: 1 / -1;
    width: 100%;
    margin: 0 0 var(--space-2);
    padding: 0;
    font-size: clamp(1.65rem, 3vw, 2.2rem);
    line-height: 1.15;
}

.form-field {
    min-width: 0;
}

.form-field--wide {
    grid-column: 1 / -1;
}

.form-field label {
    display: block;
    margin-bottom: var(--space-1);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.875rem;
    font-weight: 700;
    line-height: 1.4;
}

.form-field input {
    width: 100%;
    min-height: 3rem;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
}

.form-field input:focus {
    border-color: var(--text);
    outline: 2px solid transparent;
    box-shadow: 0 0 0 1px var(--text);
}

.form-field input[aria-invalid="true"] {
    border-color: var(--text);
}

.field-error {
    margin: var(--space-1) 0 0;
    color: var(--muted);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.8125rem;
    line-height: 1.4;
}

.form-errors,
.form-notice {
    max-width: var(--reading);
    margin: 0 0 var(--space-5);
    padding-block: var(--space-3);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.form-errors p,
.form-notice {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.9rem;
    line-height: 1.5;
}

.form-errors p {
    margin: 0;
}

.purchase-summary {
    padding-block: var(--space-6);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.purchase-summary h2 {
    margin-bottom: var(--space-5);
    font-size: clamp(1.75rem, 3vw, 2.35rem);
}

.purchase-summary__list {
    margin: 0;
}

.purchase-summary__list > div {
    display: flex;
    justify-content: space-between;
    gap: var(--space-5);
    padding-block: 0.45rem;
}

.purchase-summary__list dt,
.purchase-summary__list dd {
    margin: 0;
}

.purchase-summary__list dd {
    white-space: nowrap;
}

.purchase-summary__total {
    margin-top: var(--space-2);
    padding-top: var(--space-3) !important;
    border-top: 1px solid var(--line);
    font-weight: 700;
}

.purchase-shipping-note {
    max-width: 42rem;
    margin: var(--space-5) 0 0;
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.55;
}

.purchase-shipping-note a {
    color: var(--text);
    text-underline-offset: 0.2em;
}

.purchase-action {
    margin-top: var(--space-5);
}

@media (max-width: 760px) {
    .purchase-fields {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .form-field--wide {
        grid-column: auto;
    }

    .purchase-summary__list > div {
        gap: var(--space-3);
    }

    .purchase-action .button {
        width: 100%;
    }
}