/* Arhipelag public core: tokens, base, header, footer and shared primitives. */
:root {
--ar-cyan: #00bdf2;
    --ar-cyan-deep: #0099ca;
    --ar-cyan-soft: #dff7ff;
    --ar-ink: #151a1d;
    --ar-graphite: #65686b;
    --ar-muted: #7e8285;
    --ar-line: #d9dde0;
    --ar-line-dark: #252b2f;
    --ar-paper: #f4f2ec;
    --ar-paper-2: #ebe8df;
    --ar-white: #ffffff;
    --ar-danger: #a82c2c;
    --ar-success: #1c6a4d;
    --font-editorial: Georgia, "Times New Roman", serif;
    --font-ui: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    
    --ink: var(--ar-ink);
    --muted: var(--ar-muted);
    --line: var(--ar-line);
    --cyan: var(--ar-cyan);
    --cyan-dark: var(--ar-cyan-deep);
    --cyan-soft: var(--ar-cyan-soft);
    --paper: var(--ar-paper);
    --font-serif: var(--font-editorial);
    --font-sans: var(--font-ui);
    --container: 1280px;
    --container-reading: 780px;
    --header-height: 92px;
    --shadow-soft: 0 20px 60px rgba(21, 26, 29, .08);
    --shadow-cover: 0 20px 35px rgba(21, 26, 29, .18);
    --radius-sm: 4px;
    --radius-md: 10px;
    --radius-lg: 18px;
}

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

html {
scroll-behavior: smooth;
}

body {
margin: 0;
    min-width: 320px;
    color: var(--ar-ink);
    background: var(--ar-paper);
    font-family: var(--font-ui);
    font-size: 16px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

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

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

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

button {
color: inherit;
}

svg {
fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}

[hidden] {
display: none !important;
}

.container {
width: min(calc(100% - 48px), var(--container)); margin-inline: auto;
}

.site-main {
min-height: 65vh;
}

.visually-hidden {
position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.skip-link {
position: fixed;
    z-index: 10000;
    top: 12px;
    left: 12px;
    padding: 12px 18px;
    background: var(--ar-ink);
    color: var(--ar-white);
    transform: translateY(-150%);
}

.skip-link:focus {
transform: translateY(0);
}

h1,
h2,
h3,
h4,
p {
margin-top: 0;
}

h1,
h2,
h3 {
font-family: var(--font-editorial); font-weight: 500; line-height: 1.04; letter-spacing: -.025em;
}

h1 {
font-size: clamp(3.1rem, 7vw, 7.6rem);
}

h2 {
font-size: clamp(2.2rem, 4.5vw, 4.5rem);
}

h3 {
font-size: clamp(1.35rem, 2vw, 2rem);
}

.section-kicker,
.eyebrow {
display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    color: var(--ar-cyan-deep);
    font-size: .72rem;
    font-weight: 800;
    letter-spacing: .16em;
    line-height: 1.2;
}

.section-kicker::before,
.eyebrow::before {
content: ""; width: 24px; height: 2px; background: currentColor;
}

.text-link {
display: inline-flex;
    align-items: center;
    gap: 9px;
    font-size: .82rem;
    font-weight: 750;
    letter-spacing: .04em;
    text-transform: uppercase;
    border-bottom: 1px solid currentColor;
    padding-bottom: 4px;
    transition: color .2s ease, gap .2s ease;
}

.text-link:hover {
color: var(--ar-cyan-deep); gap: 14px;
}

.button,
.btn {
display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 22px;
    border: 1px solid transparent;
    border-radius: 0;
    font-weight: 750;
    font-size: .82rem;
    letter-spacing: .05em;
    text-transform: uppercase;
    cursor: pointer;
    transition: transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
}

.button:hover,
.btn:hover {
transform: translateY(-2px);
}

.button-primary,
.btn-primary {
background: var(--ar-ink); color: var(--ar-white); border-color: var(--ar-ink);
}

.button-primary:hover,
.btn-primary:hover {
background: var(--ar-cyan-deep); border-color: var(--ar-cyan-deep);
}

.button-secondary,
.btn-outline {
background: transparent; border-color: var(--ar-ink); color: var(--ar-ink);
}

.button-secondary:hover,
.btn-outline:hover {
background: var(--ar-ink); color: var(--ar-white);
}

.button-text {
min-height: auto; padding: 0 0 5px; border-bottom-color: currentColor;
}

.button-block,
.btn-wide {
width: 100%;
}

button:disabled,
.button[aria-disabled="true"] {
opacity: .45; cursor: not-allowed; transform: none;
}

.site-notice {
background: var(--ar-ink); color: var(--ar-white); font-size: .75rem; letter-spacing: .03em;
}

.site-notice-inner {
min-height: 34px; display: flex; align-items: center; justify-content: space-between; gap: 24px;
}

.site-notice p {
margin: 0;
}

.site-notice strong {
color: var(--ar-cyan);
}

.site-notice a {
color: #d6d9db;
}

.site-header {
position: sticky;
    top: 0;
    z-index: 900;
    background: rgba(244, 242, 236, .95);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--ar-line);
}

.site-header-main {
min-height: var(--header-height); display: grid; grid-template-columns: 240px 1fr auto; align-items: center; gap: 40px;
}

.site-logo {
display: block; width: 212px;
}

.site-logo img {
width: 100%; height: auto;
}

.main-navigation {
display: flex; align-items: center; justify-content: center; gap: clamp(18px, 2.2vw, 36px);
}

.main-navigation a {
position: relative;
    padding: 35px 0 31px;
    color: #353b3f;
    font-size: .78rem;
    font-weight: 750;
    letter-spacing: .06em;
    text-transform: uppercase;
}

.main-navigation a::after {
content: ""; position: absolute; inset: auto 0 24px; height: 2px; background: var(--ar-cyan); transform: scaleX(0); transform-origin: left; transition: transform .2s ease;
}

.main-navigation a:hover::after,
.main-navigation a.is-active::after {
transform: scaleX(1);
}

.site-header-actions {
display: flex; align-items: center; gap: 8px;
}

.header-search-link,
.header-cart {
min-height: 42px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0 12px;
    border: 0;
    background: transparent;
    font-size: .78rem;
    font-weight: 750;
    text-transform: uppercase;
    cursor: pointer;
}

.header-search-link svg,
.header-cart svg {
width: 20px; height: 20px;
}

.header-cart {
position: relative;
}

.nav-toggle {
display: none; width: 44px; height: 44px; padding: 10px; border: 0; background: transparent; cursor: pointer;
}

.nav-toggle span {
display: block; width: 22px; height: 1.5px; margin: 5px auto; background: var(--ar-ink);
}

.site-footer {
background: var(--ar-ink); color: var(--ar-white);
}

.footer-top {
display: grid; grid-template-columns: minmax(250px, 1fr) 2fr; gap: 9vw; padding: 88px 0 72px;
}

.footer-brand {
display: inline-block; font-family: var(--font-editorial); font-size: clamp(2.8rem, 5vw, 5.5rem); line-height: .9; color: var(--ar-cyan);
}

.footer-manifesto p {
max-width: 360px; margin: 24px 0 0; color: #b9bec1; font-family: var(--font-editorial); font-size: 1.35rem;
}

.footer-navigation {
display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px;
}

.footer-navigation h2 {
margin: 0 0 24px; color: #80868a; font-family: var(--font-ui); font-size: .72rem; font-weight: 800; letter-spacing: .15em; text-transform: uppercase;
}

.footer-navigation a,
.footer-navigation span {
display: block; margin: 0 0 12px; color: #d8dcde; font-size: .92rem;
}

.footer-navigation a:hover {
color: var(--ar-cyan);
}

.footer-bottom {
display: flex; justify-content: space-between; padding: 20px 0; border-top: 1px solid #2b3236; color: #899094; font-size: .74rem;
}

.page-intro {
padding: 96px 0 76px; border-bottom: 1px solid var(--ar-line);
}

.page-intro-grid {
display: grid; grid-template-columns: 1.1fr .9fr; align-items: end; gap: 8vw;
}

.page-intro h1 {
margin: 0;
}

.page-intro p {
max-width: 620px; margin: 0 0 10px; color: var(--ar-graphite); font-family: var(--font-editorial); font-size: clamp(1.25rem, 2.2vw, 2rem); line-height: 1.35;
}

.editorial-section {
padding: 96px 0;
}

.section-heading {
display: grid; grid-template-columns: minmax(240px, 1.1fr) minmax(250px, .8fr) auto; align-items: end; gap: 40px; margin-bottom: 52px; padding-bottom: 28px; border-bottom: 1px solid var(--ar-line);
}

.section-heading h2 {
margin: 0;
}

.section-heading p {
margin: 0; color: var(--ar-graphite);
}

.empty-state {
min-height: 300px; display: grid; place-items: center; align-content: center; text-align: center; padding: 50px; border: 1px solid var(--ar-line); background: rgba(255,255,255,.55);
}

.empty-state > span {
display: grid; place-items: center; width: 64px; height: 64px; margin-bottom: 22px; background: var(--ar-cyan); font-family: var(--font-editorial); font-size: 2rem;
}

.empty-state h2,
.empty-state h3 {
margin-bottom: 12px;
}

.empty-state p {
max-width: 520px; color: var(--ar-graphite);
}

.curated-week {
padding-right: 60px; border-right: 1px solid var(--ar-line);
}

.curated-week-heading h2,
.curated-most-read h2 {
margin: 0 0 28px; font-size: clamp(2.2rem, 4vw, 4rem);
}

.curated-week-body {
display: grid; grid-template-columns: 190px 1fr; gap: 36px; align-items: center;
}

.curated-week-cover {
padding: 9px; background: var(--ar-paper); box-shadow: var(--shadow-cover);
}

.curated-week-cover img {
width: 100%; aspect-ratio: 2/3; object-fit: contain;
}

.curated-week-copy > span {
color: var(--ar-cyan-deep); font-size: .74rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase;
}

.curated-week-copy h3 {
margin: 8px 0 16px; font-size: clamp(1.8rem, 3vw, 3.2rem);
}

.curated-week-copy p {
color: var(--ar-graphite);
}

.curated-most-read {
padding-left: 60px;
}

.curated-most-read header {
margin-bottom: 20px;
}

.curated-most-read ol {
list-style: none; margin: 0; padding: 0;
}

.books-most-read-item {
display: grid; grid-template-columns: 36px 54px 1fr 22px; align-items: center; gap: 16px; min-height: 84px; padding: 13px 0; border-top: 1px solid var(--ar-line); opacity: .64; transition: opacity .2s ease, padding .2s ease;
}

.books-most-read-item.is-active,
.books-most-read-item:hover {
opacity: 1; padding-left: 10px;
}

.books-most-read-number {
color: var(--ar-cyan-deep); font-size: .7rem; font-weight: 800;
}

.books-most-read-cover {
height: 58px; padding: 3px; background: var(--ar-paper);
}

.books-most-read-cover img {
width: 100%; height: 100%; object-fit: contain;
}

.books-most-read-copy {
display: flex; flex-direction: column;
}

.books-most-read-copy small {
color: var(--ar-muted); font-size: .68rem; text-transform: uppercase;
}

.books-most-read-copy strong {
font-family: var(--font-editorial); font-size: 1.1rem; font-weight: 500;
}

.book-category-links {
display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px;
}

.book-category-links a {
padding: 6px 9px; border: 1px solid var(--ar-line); color: var(--ar-graphite); font-size: .68rem; font-weight: 750; letter-spacing: .08em; text-transform: uppercase;
}

.system-page {
min-height: 70vh; display: grid; place-items: center; padding: 80px 0; text-align: center;
}

.system-page .container {
max-width: 760px;
}

.system-page-code {
display: block; margin-bottom: 30px; color: var(--ar-cyan-deep); font-family: var(--font-editorial); font-size: clamp(5rem, 12vw, 12rem); line-height: .7; opacity: .24;
}

.system-page h1 {
margin: 0 0 20px; font-size: clamp(3rem, 6vw, 6rem);
}

.system-page p {
max-width: 600px; margin: 0 auto 28px; color: var(--ar-graphite);
}

@keyframes spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
*,
*::before,
*::after {
scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important;
}

}

@media (max-width: 1120px) {
:root {
--header-height: 78px;
}
.site-header-main {
grid-template-columns: 200px 1fr auto; gap: 20px;
}
.site-logo {
width: 185px;
}
.main-navigation {
gap: 18px;
}
.header-search-link span {
display: none;
}

}

@media (max-width: 900px) {
.container {
width: min(calc(100% - 32px), var(--container));
}
.site-notice-inner a {
display: none;
}
.site-header-main {
grid-template-columns: 1fr auto;
}
.site-logo {
width: 175px;
}
.main-navigation {
position: absolute;
        z-index: 950;
        top: 100%;
        right: 0;
        left: 0;
        max-height: calc(100vh - var(--header-height));
        overflow-y: auto;
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 18px 16px 26px;
        background: var(--ar-paper);
        border-bottom: 1px solid var(--ar-line);
        box-shadow: var(--shadow-soft);
        transform: translateY(-130%);
        opacity: 0;
        pointer-events: none;
        transition: transform .25s ease, opacity .25s ease;
}
.main-navigation.open {
transform: translateY(0); opacity: 1; pointer-events: auto;
}
.main-navigation a {
padding: 15px 8px; border-bottom: 1px solid var(--ar-line);
}
.main-navigation a::after {
display: none;
}
.nav-toggle {
display: block;
}
.header-search-link {
display: none;
}
.footer-top {
grid-template-columns: 1fr; gap: 60px;
}
.footer-navigation {
grid-template-columns: repeat(3, 1fr);
}
.page-intro-grid,
.section-heading {
grid-template-columns: 1fr; gap: 24px;
}
.section-heading {
align-items: start;
}
.curated-week {
padding-right: 0; padding-bottom: 55px; border-right: 0; border-bottom: 1px solid var(--ar-line);
}
.curated-most-read {
padding: 55px 0 0;
}

}

@media (max-width: 620px) {
.container {
width: min(calc(100% - 24px), var(--container));
}
.site-notice p {
font-size: .67rem;
}
.site-header-main {
min-height: 72px;
}
.site-logo {
width: 150px;
}
.page-intro {
padding: 64px 0 48px;
}
.page-intro h1 {
font-size: clamp(3.2rem, 17vw, 5rem);
}
.page-intro p {
font-size: 1.2rem;
}
.editorial-section {
padding: 68px 0;
}
.footer-navigation {
grid-template-columns: 1fr; gap: 32px;
}
.footer-bottom {
flex-direction: column; gap: 6px;
}
.curated-week-body {
grid-template-columns: 110px 1fr; gap: 20px;
}
.curated-week-copy h3 {
font-size: 1.8rem;
}
.curated-week-copy p {
display: -webkit-box; overflow: hidden; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
}

}

.btn-danger-outline {
border-color: #bd8c8c; background: transparent; color: var(--ar-danger);
}

.btn-danger-outline:hover {
border-color: var(--ar-danger); background: var(--ar-danger); color: #fff;
}

/* Accessibility, contrast and global title scale */
:root {
    --ar-cyan-deep: #006f91;
    --ar-graphite: #454c50;
    --ar-muted: #565d61;
    --ar-focus: #8a4500;
}

html { scroll-padding-top: calc(var(--header-height) + 28px); }
body { color: #171c1f; }

h1 { font-size: clamp(2.55rem, 5.2vw, 5.4rem); }
h2 { font-size: clamp(1.9rem, 3.7vw, 3.65rem); }
h3 { font-size: clamp(1.2rem, 1.8vw, 1.75rem); }

.page-intro { padding-block: clamp(58px, 7vw, 82px) clamp(48px, 6vw, 68px); }
.page-intro h1 { font-size: clamp(2.65rem, 5vw, 4.8rem); }
.page-intro p { color: #454c50; font-size: clamp(1.05rem, 1.7vw, 1.5rem); }
.section-heading h2 { font-size: clamp(1.9rem, 3.3vw, 3.35rem); }
.section-kicker,
.eyebrow { color: #006785; }

:where(a, button, input, select, textarea, summary):focus-visible {
    outline: 3px solid var(--ar-focus);
    outline-offset: 3px;
}

button,
[role="button"] { touch-action: manipulation; }

.text-link { min-height: 44px; align-items: center; }
.button,
.btn { min-height: 48px; }

.site-notice a,
.footer-navigation a,
.footer-navigation span,
.footer-bottom { color: #c8ced1; }

.site-header-actions button,
.header-search-link,
.nav-toggle { min-width: 44px; min-height: 44px; }

@supports (content-visibility: auto) {
    .catalog-section,
    .article-related-section,
    .book-set-recommendations,
    .author-books-section,
    .home-reading-room {
        content-visibility: auto;
        contain-intrinsic-size: 700px;
    }
}

@media (max-width: 620px) {
    .container { width: min(calc(100% - 28px), var(--container)); }
    h1 { font-size: clamp(2.2rem, 11vw, 3.35rem); }
    h2 { font-size: clamp(1.65rem, 8vw, 2.5rem); }
    .page-intro h1 { font-size: clamp(2.25rem, 12vw, 3.4rem); }
    .page-intro-grid { gap: 20px; }
    .section-heading { gap: 18px; }
}


/* Final shared accessibility and reduced heading scale */
h1 { font-size: clamp(2.35rem, 4.3vw, 4.45rem); }
h2 { font-size: clamp(1.75rem, 3vw, 3.05rem); }
.page-intro h1 { font-size: clamp(2.35rem, 4.2vw, 3.9rem); line-height: 1; }
.page-intro-articles h1 { max-width: 900px; font-size: clamp(2.25rem, 4vw, 3.7rem); }
.section-heading h2 { font-size: clamp(1.75rem, 2.8vw, 2.9rem); }
.section-kicker { color: #005d79; }

:where(a, button, input, select, textarea):not([tabindex="-1"]) { -webkit-tap-highlight-color: rgba(0, 111, 145, .18); }
:where(button, .button, .btn, .text-link, .main-navigation a, .footer-navigation a) { min-height: 44px; }

@media (max-width: 620px) {
    h1 { font-size: clamp(2.05rem, 9.6vw, 3rem); }
    h2 { font-size: clamp(1.55rem, 7.2vw, 2.2rem); }
    .page-intro h1,
    .page-intro-articles h1 { font-size: clamp(2.05rem, 10vw, 3rem); }
    .page-intro { padding-block: 52px 42px; }
    .page-intro p { font-size: 1.05rem; }
}


/* Lighthouse accessibility: maintain full contrast in curated lists. */
.books-most-read-item {
    opacity: 1;
}

.books-most-read-number {
    color: #005f7a;
}

.books-most-read-copy small {
    color: #4d5a60;
}