@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,300..800;1,6..72,300..800&family=Space+Grotesk:wght@300..700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Palette ── */
:root {
    --ink:   #1a1d29;
    --cream: #f5efe4;
    --amber: #c47a3b;
    --rust:  #8b3a2f;
    --sage:  #5d6b4a;
}

/* ── Semantic tokens — light ── */
:root {
    --bg:                    var(--cream);
    --bg-alt:                rgba(196, 122, 59, 0.07);
    --bg-inverse:            var(--ink);
    --text:                  var(--ink);
    --text-muted:            rgba(26, 29, 41, 0.65);
    --text-on-inverse:       var(--cream);
    --text-on-inverse-muted: rgba(245, 239, 228, 0.72);
    --footer-bg:             var(--ink);
    --footer-text:           var(--cream);
}

/* ── Semantic tokens — dark ── */
[data-theme="dark"] {
    --bg:                    var(--ink);
    --bg-alt:                rgba(196, 122, 59, 0.06);
    --bg-inverse:            #252837;
    --text:                  var(--cream);
    --text-muted:            rgba(245, 239, 228, 0.6);
    --text-on-inverse:       var(--cream);
    --text-on-inverse-muted: rgba(245, 239, 228, 0.68);
    --footer-bg:             #0f1119;
    --footer-text:           rgba(245, 239, 228, 0.85);
}

html {
    scroll-behavior: smooth;
}

/* ── Dev banner ── */
.dev-banner {
    background-color: var(--amber);
    color: var(--cream);
    text-align: center;
    padding: 10px 24px;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.4;
}

.dev-banner__label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background-color: rgba(26, 29, 41, 0.2);
    padding: 2px 8px;
    border-radius: 3px;
    margin-right: 10px;
    vertical-align: middle;
}

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: 'Space Grotesk', sans-serif;
}

body {
    max-width: 100vw;
    overflow-x: hidden;
    background-color: var(--bg);
    color: var(--text);
    transition: background-color 250ms ease, color 250ms ease;
}

nav {
    height: 80px;
    display: flex;
    background-color: var(--bg);
    transition: background-color 250ms ease;
}

img {
    width: 100%;
    height: 100%;
    max-height: 50vh;
}

p {
    line-height: 1.5;
}

a {
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.purple {
    color: var(--amber);
    font-family: 'Newsreader', serif;
    font-style: italic;
}

/* ── Nav ── */
.nav__container {
    width: 100%;
    max-width: 1200px;
    display: flex;
    padding: 0 24px;
    justify-content: space-between;
    margin: 0 auto;
    align-items: center;
    position: relative;
}

.nav__links {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.logo {
    height: 36px;
    width: auto;
    max-width: 140px;
    object-fit: contain;
}

ul {
    display: flex;
}

li {
    list-style-type: none;
}

.nav__link {
    margin-left: 16px;
    text-decoration: none;
    font-size: 20px;
    color: var(--text);
    font-weight: 600;
    padding: 8px;
    letter-spacing: -0.01em;
    transition: color 200ms ease;
}

.nav__link:hover {
    text-decoration: underline;
    color: var(--amber);
}

.nav__link--primary {
    color: var(--amber);
    border: 2px solid var(--amber);
    border-radius: 4px;
}

.nav__link--primary:hover {
    text-decoration: none;
    background-color: var(--amber);
    color: var(--cream);
}

/* ── Theme toggle ── */
.btn__theme {
    background: none;
    border: 1.5px solid rgba(196, 122, 59, 0.45);
    border-radius: 4px;
    color: var(--amber);
    width: 36px;
    height: 36px;
    font-size: 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 12px;
    transition: background-color 200ms ease, color 200ms ease, border-color 200ms ease;
    flex-shrink: 0;
}

.btn__theme:hover {
    background-color: var(--amber);
    color: var(--cream);
    border-color: var(--amber);
}

.btn__theme:active {
    transform: translateY(1px);
}

#themeToggle .fa-sun { display: none; }
[data-theme="dark"] #themeToggle .fa-moon { display: none; }
[data-theme="dark"] #themeToggle .fa-sun { display: inline-block; }

/* ── Mobile menu ── */
.btn__menu {
    background-color: transparent;
    font-size: 40px;
    text-align: center;
    border: none;
    color: var(--amber);
    display: none;
    cursor: pointer;
}

.menu__backdrop {
    position: fixed;
    inset: 0;
    background-color: var(--ink);
    border-top: 3px solid var(--amber);
    z-index: 100;
    display: flex;
    flex-direction: column;
    padding: 0 32px 40px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 280ms ease, visibility 280ms ease;
}

.menu-open {
    overflow: hidden;
}

.menu-open .menu__backdrop {
    visibility: visible;
    opacity: 1;
}

.menu__top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    flex-shrink: 0;
}

.menu__wordmark {
    font-family: 'Newsreader', serif;
    font-size: 22px;
    font-style: italic;
    color: var(--cream);
    letter-spacing: -0.02em;
}

.menu__close {
    background: none;
    border: 1.5px solid rgba(245, 239, 228, 0.18);
    border-radius: 4px;
    color: var(--cream);
    width: 40px;
    height: 40px;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 200ms ease, color 200ms ease;
}

.menu__close:hover {
    border-color: var(--amber);
    color: var(--amber);
}

.menu__links {
    display: flex;
    flex-direction: column;
    flex: 1;
    justify-content: center;
    list-style: none;
    padding: 0;
}

.menu__list {
    border-bottom: 1px solid rgba(245, 239, 228, 0.08);
}

.menu__list:first-child {
    border-top: 1px solid rgba(245, 239, 228, 0.08);
}

.menu__link {
    display: flex;
    align-items: baseline;
    gap: 18px;
    padding: 22px 0;
    color: var(--cream);
    font-family: 'Newsreader', serif;
    font-size: 52px;
    font-weight: 300;
    letter-spacing: -0.03em;
    text-decoration: none;
    transition: color 200ms ease, padding-left 200ms ease;
}

.menu__link:hover {
    color: var(--amber);
    padding-left: 10px;
    text-decoration: none;
}

.menu__link-index {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--amber);
    opacity: 0.65;
    letter-spacing: 0.06em;
    flex-shrink: 0;
    margin-bottom: 6px;
}

.menu__footer {
    border-top: 1px solid rgba(245, 239, 228, 0.08);
    padding-top: 20px;
}

.menu__copy {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: rgba(245, 239, 228, 0.3);
    letter-spacing: 0.04em;
}

/* ── Landing ── */
#landing {
    background-color: var(--bg);
    transition: background-color 250ms ease;
}

header {
    height: calc(100vh - 80px);
}

.header__container {
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
}

.header__description {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.header__eyebrow {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--amber);
    opacity: 0.8;
    margin-bottom: 16px;
}

.header__actions {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
}

.header__link {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
    opacity: 0.7;
    transition: opacity 200ms ease, color 200ms ease;
}

.header__link:hover {
    opacity: 1;
    color: var(--amber);
    text-decoration: none;
}

.header__img--wrapper {
    padding: 20px;
    z-index: 2;
}

h1 {
    font-size: 56px;
    font-family: 'Newsreader', serif;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 24px;
    text-align: center;
    line-height: 1.1;
    letter-spacing: -0.02em;
    transition: color 250ms ease;
}

h1 .text {
    color: var(--amber);
    font-style: italic;
}

h2 {
    font-size: 32px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 400;
    margin-bottom: 32px;
    text-align: center;
    color: var(--text-muted);
    transition: color 250ms ease;
}

.section__title {
    font-family: 'Newsreader', serif;
    font-weight: 700;
    font-size: 36px;
    margin-bottom: 40px;
    opacity: 1;
    color: var(--text);
    transition: color 250ms ease;
}

button {
    cursor: pointer;
}

button:active {
    transform: translateY(1px);
}

.btn {
    background-color: var(--amber);
    color: var(--cream);
    padding: 12px 24px;
    font-size: 20px;
    border-radius: 4px;
    border: none;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: background-color 200ms ease;
}

.btn:hover {
    background-color: var(--rust);
}

.header__image {
    padding: 24px;
    margin-top: 32px;
}

.container {
    padding: 56px 0;
}

.row {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* ── Highlights ── */
#highlights {
    position: relative;
    max-width: 100vw;
    background-color: var(--bg-inverse);
    transition: background-color 250ms ease;
}

#highlights .section__title {
    color: var(--text-on-inverse);
}

[data-theme="dark"] #highlights::before,
[data-theme="dark"] #highlights::after {
    opacity: 0;
    pointer-events: none;
}

.highlight__wrapper {
    display: flex;
    flex-wrap: wrap;
}

.highlight {
    padding: 0 24px;
    width: calc(100% / 3);
    display: flex;
    align-items: center;
    flex-direction: column;
}

.highlight:not(:last-child) {
    margin-bottom: 24px;
}

.highlight__para {
    text-align: center;
    max-width: 280px;
    color: var(--text-on-inverse-muted);
    transition: color 250ms ease;
}

.highlight__img {
    color: var(--amber);
    border: 2px solid rgba(196, 122, 59, 0.35);
    width: 100px;
    height: 100px;
    align-items: center;
    justify-content: center;
    display: flex;
    border-radius: 4px;
    font-size: 32px;
    margin-bottom: 24px;
}

.highlight__subtitle {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
    text-align: center;
    color: var(--text-on-inverse);
    transition: color 250ms ease;
}

/* ── Features ── */
#features {
    padding-top: 8vw;
    background-color: var(--bg-alt);
    transition: background-color 250ms ease;
}

.books {
    display: flex;
    flex-wrap: wrap;
}

.book {
    width: 25%;
    padding: 24px;
}

.book__img {
    max-width: 380px;
    transition: all 300ms ease;
    cursor: not-allowed;
}

.book__img--wrapper {
    margin-bottom: 8px;
    border-radius: 4px;
    overflow: hidden;
    display: flex;
}

.book:hover .book__img {
    transform: scale(1.03);
}

.book__title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.book__title:hover {
    text-decoration: underline;
    cursor: not-allowed;
}

.book__ratings {
    margin-bottom: 8px;
    color: var(--amber);
}

.book__price {
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    transition: color 250ms ease;
}

.book__price--normal {
    text-decoration: line-through;
    padding-right: 6px;
    color: var(--text-muted);
}

.row__column {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.nocursor {
    cursor: not-allowed;
}

/* ── Explore ── */
#explore {
    background-color: var(--bg-alt);
    transition: background-color 250ms ease;
}

/* ── Footer ── */
footer {
    background-color: var(--footer-bg);
    transition: background-color 250ms ease;
}

.footer__logo {
    display: flex;
}

.footer__logo--img {
    width: 160px;
    /* filter: grayscale(1) invert(1); */
}

.footer__link, .footer__copyright {
    color: var(--footer-text);
}

.footer__link {
    padding: 0 8px;
    font-family: 'Space Grotesk', sans-serif;
    transition: color 200ms ease, opacity 200ms ease;
}

.footer__link:hover {
    color: var(--amber);
    text-decoration: none;
}

.footer__list {
    margin: 20px 0 24px 0;
}

.footer__copyright {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    opacity: 0.45;
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .header__description {
        padding: 0 24px;
    }

    h1 {
        font-size: 40px;
    }

    h2 {
        font-size: 26px;
    }

    .btn {
        font-size: 18px;
    }

    .book {
        width: 50%;
    }
}

@media (max-width: 550px) {
    .nav__links {
        display: none;
    }

    .btn__menu {
        display: block;
        font-size: 40px;
    }

    .highlight {
        width: 100%;
    }
}