/* ---------- Design tokens (Broadsheet / PuzzleBasket) ---------- */
:root {
    --color-bg: #f3f2f2;
    --color-surface: #eae9e9;
    --color-white: #ffffff;
    --color-text: #201e1d;
    --color-text-700: #605d5d;
    --color-text-800: #444141;
    --color-divider: rgba(32, 30, 29, .12);

    --color-accent: #0088b0;
    --color-accent-100: #e9f8ff;
    --color-accent-200: #cbeeff;
    --color-accent-300: #99e0ff;
    --color-accent-700: #006786;
    --color-accent-800: #004961;
    --color-accent-900: #0a303e;
    --color-heading: #0a3a4a;

    --color-accent-2: #d6006c;
    --color-accent-2-100: #fff1f4;
    --color-accent-2-800: #790e3d;
    --color-error: #b42318;
    --color-error-tint: #ffe4e0;
    --color-success: #2f6b3a;
    --color-hint: #fff3c4;

    --font-heading: "Source Serif 4", system-ui, serif;
    --font-body: "Source Serif 4", system-ui, serif;
    --font-mono: "Source Code Pro", monospace;

    --radius-md: 3px;
    --radius-lg: 6px;
    --shadow-sm: 0 1px 2px rgba(45, 43, 43, .14);
    --shadow-md: 0 3px 10px rgba(45, 43, 43, .16);
    --content-max: 1240px;
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
body {
    margin: 0;
    font-family: var(--font-body);
    font-size: 19px;
    line-height: 1.55;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent-700); text-decoration: none; }
a:hover { color: var(--color-accent-800); text-decoration: underline; }
h1, h2, h3, h4 {
    font-family: var(--font-heading); font-weight: 600; letter-spacing: -0.015em;
    color: var(--color-heading); margin: 0 0 0.5rem;
}

/* ---------- Buttons ---------- */
.btn, .post__content a[href$=".pdf"] {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    min-height: 52px; padding: 0 26px; font-family: var(--font-heading); font-weight: 600;
    font-size: 18px; border-radius: var(--radius-md); cursor: pointer; text-decoration: none;
    border: 1.5px solid transparent; transition: background .15s ease;
}
.btn-primary, .post__content a[href$=".pdf"] { background: var(--color-accent-700); color: #fff; }
.btn-primary:hover, .post__content a[href$=".pdf"]:hover { background: var(--color-accent-800); color: #fff; text-decoration: none; }
.btn-secondary { background: transparent; border-color: var(--color-text); color: var(--color-text); }
.btn-secondary:hover { background: rgba(32, 30, 29, .06); text-decoration: none; }
.btn-block { display: flex; width: 100%; }

/* ---------- Puzzle-type square + difficulty dots (used across pages) ---------- */
.type-square { display: inline-block; width: 10px; height: 10px; flex: none; }
.difficulty-dots { display: inline-flex; gap: 3px; align-items: center; }
.difficulty-dots span {
    width: 7px; height: 7px; border-radius: 50%; border: 1.5px solid var(--color-text);
}
.difficulty-dots span.filled { background: var(--color-text); }

/* ---------- Header ---------- */
.site-header {
    background: var(--color-bg);
    position: sticky; top: 0; z-index: 100;
    box-shadow: 0 1px 0 var(--color-divider);
}
.site-header__bar {
    max-width: var(--content-max);
    margin: 0 auto;
    padding: 14px 32px;
    display: flex;
    align-items: center;
    gap: 12px 28px;
}

.site-logo { display: flex; align-items: center; gap: 14px; flex: none; color: var(--color-text); text-decoration: none; }
.site-logo:hover { text-decoration: none; }
.site-logo__icon { width: 58px; height: 62px; flex: none; }
.site-logo__word { font-family: var(--font-heading); font-weight: 600; font-size: 35px; letter-spacing: -0.035em; }
.site-logo__word--a { color: var(--color-accent-700); }
.site-logo__word--b { color: var(--color-accent); }

/* Desktop nav */
.site-menu { flex: 1 1 0; min-width: 0; }
.site-menu__list { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 2px; }
.site-menu__item { position: relative; }
.site-menu__item > a, .site-menu__trigger {
    display: flex; align-items: center; gap: 6px;
    padding: 10px 14px; white-space: nowrap;
    border-radius: var(--radius-md); color: var(--color-text); text-decoration: none;
    font-size: 17px; border: 0; background: transparent; font-family: var(--font-body); cursor: pointer;
}
.site-menu__item > a:hover, .site-menu__trigger:hover { background: var(--color-surface); text-decoration: none; }
.site-menu__caret {
    width: 8px; height: 8px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
    transform: rotate(45deg); margin-left: 2px; transition: transform .15s ease;
}
.site-menu__item.is-open .site-menu__caret { transform: rotate(225deg); }

.mega-menu {
    display: none;
    position: absolute; left: 0; top: 100%;
    background: var(--color-bg); border-radius: var(--radius-lg);
    box-shadow: 0 1px 0 var(--color-divider), 0 12px 32px rgba(45, 43, 43, .22);
    padding: 20px; min-width: 520px; z-index: 20;
}
.site-menu__item.is-open .mega-menu { display: block; }
.mega-menu__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 2px 20px; }
.mega-menu__item {
    display: flex; align-items: center; gap: 10px; padding: 8px 10px;
    border-radius: var(--radius-md); font-size: 16px; color: var(--color-text); text-decoration: none;
}
.mega-menu__item:hover { background: var(--color-surface); text-decoration: none; }
.mega-menu__name { flex: 1; }
.mega-menu__count { font-family: var(--font-mono); font-size: 13px; color: var(--color-text-700); }

/* Icon buttons */
.icon-btn {
    flex: none; width: 44px; height: 44px; display: grid; place-items: center;
    border: 1.5px solid var(--color-divider); border-radius: var(--radius-md);
    background: var(--color-white); cursor: pointer;
}
.icon-btn:hover { border-color: var(--color-accent); }
.search-icon { position: relative; width: 16px; height: 16px; border: 2px solid var(--color-text-800); border-radius: 50%; display: block; }
.search-icon::after { content: ""; position: absolute; right: -6px; bottom: -5px; width: 7px; height: 2px; background: var(--color-text-800); transform: rotate(45deg); }

/* Mobile burger + full-screen menu */
.menu-toggle--burger {
    display: none; flex: none; width: 44px; height: 44px; border: 0; border-radius: var(--radius-md);
    background: var(--color-accent); cursor: pointer; align-items: center; justify-content: center;
}
.burger-icon { display: flex; flex-direction: column; gap: 5px; }
.burger-icon span { width: 20px; height: 2px; background: #fff; display: block; }

.mobile-menu {
    display: none;
    position: fixed; inset: 0; top: 73px; overflow-y: auto;
    background: var(--color-bg); padding: 12px 20px 40px;
}
.mobile-menu.is-open { display: flex; flex-direction: column; }
.mobile-menu__top {
    padding: 16px 0; border-bottom: 1px solid var(--color-divider);
    font-family: var(--font-heading); font-weight: 600; font-size: 22px; color: var(--color-heading);
}
.mobile-menu__label {
    font-family: var(--font-mono); font-size: 13px; letter-spacing: .1em; text-transform: uppercase;
    color: var(--color-text-700); padding: 24px 0 8px;
}
.mobile-menu__type { display: flex; align-items: center; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--color-divider); font-size: 18px; }
.mobile-menu__type-name { flex: 1; color: var(--color-text); }

/* The old simple hamburger class name is reused for the mobile burger's
   visibility toggle, shared with the full-screen overlay panel. */
@media (max-width: 819px) {
    .site-menu { display: none; }
    .icon-btn--search { display: none; }
    .menu-toggle--burger { display: flex; }
    .site-logo__icon { width: 40px; height: 43px; }
    .site-logo__word { font-size: 25px; }
}
@media (min-width: 820px) and (max-width: 1099px) {
    .site-logo__icon { width: 44px; height: 47px; }
    .site-logo__word { font-size: 27px; }
}
@media (min-width: 820px) {
    .menu-toggle--burger { display: none; }
    .mobile-menu { display: none !important; }
}

/* ---------- Page content ---------- */
.page-content {
    max-width: var(--content-max);
    margin: 0 auto;
    padding: 32px 32px 64px;
    min-height: 60vh;
}
@media (max-width: 819px) {
    .page-content { padding: 20px 20px 48px; }
}

/* ---------- Feed ---------- */
.feed__title { margin-bottom: 1.5rem; }
.feed__list { display: flex; flex-direction: column; gap: 2rem; }
.feed-item { display: flex; gap: 1.25rem; align-items: flex-start; }
.feed-item__image-link { flex: 0 0 240px; }
.feed-item__image {
    width: 240px; height: 160px; object-fit: cover;
    border-radius: var(--radius-lg); background: var(--color-surface);
}
.feed-item__body { flex: 1 1 auto; min-width: 0; }
.feed-item__category {
    display: inline-block; font-family: var(--font-mono); font-size: 0.8rem;
    text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-text-700); margin-bottom: 0.25rem;
}
.feed-item__title { margin: 0 0 0.25rem; font-size: 1.25rem; }
.feed-item__title a { color: var(--color-heading); }
.feed-item__date { display: block; font-family: var(--font-mono); font-size: 0.85rem; color: var(--color-text-700); margin-bottom: 0.5rem; }
.feed-item__excerpt { margin: 0; color: var(--color-text-800); }

@media (max-width: 819px) {
    .feed-item { flex-direction: column; }
    .feed-item__image-link { flex-basis: auto; width: 100%; }
    .feed-item__image { width: 100%; height: auto; aspect-ratio: 16 / 9; }
}

/* ---------- Pagination ---------- */
.pagination { display: flex; justify-content: center; align-items: center; gap: 1.5rem; margin-top: 2.5rem; }
.pagination__status { color: var(--color-text-700); font-size: 0.9rem; }

/* ---------- Single post / puzzle article ---------- */
.breadcrumbs { display: flex; gap: 8px; font-size: 15px; color: var(--color-text-700); margin-bottom: 1.5rem; }
.breadcrumbs a { color: var(--color-text-700); }

.article-layout {
    display: grid; grid-template-columns: minmax(0, 680px) 300px;
    gap: clamp(48px, 7vw, 120px); align-items: start;
}
@media (max-width: 1059px) {
    .article-layout { grid-template-columns: minmax(0, 1fr); }
}

.post__tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 1rem; }
.tag { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; padding: 4px 12px; border-radius: var(--radius-md); background: var(--color-surface); }
.tag--difficulty { color: var(--color-text-800); }

.post__title { margin-bottom: 0.5rem; color: var(--color-heading); }
.post__lead { font-size: 19px; line-height: 1.55; color: var(--color-text-800); margin: 0 0 1rem; }
.post__byline { color: var(--color-text-700); font-size: 0.9rem; margin-bottom: 1.5rem; display: flex; gap: 0.6rem; align-items: center; }

.post__content { overflow: auto; font-size: 20px; line-height: 1.65; }
.post__content h2 { scroll-margin-top: 90px; }
.post__content a[href$=".pdf"] { margin: 4px 0; }

.answer-key { margin-top: 2rem; }
.answer-key__wrap { position: relative; display: inline-block; max-width: 100%; }
.answer-key__image { border-radius: var(--radius-lg); filter: blur(6px); transition: filter 0.3s ease; }
.answer-key__image:not(.is-blurred) { filter: none; }
.answer-key__reveal {
    position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
}
.answer-key__wrap:has(.answer-key__image:not(.is-blurred)) .answer-key__reveal { display: none; }

.post-sidebar { position: sticky; top: 24px; display: flex; flex-direction: column; gap: 24px; }
@media (max-width: 1059px) { .post-sidebar { display: none; } }
.post-sidebar__card {
    background: var(--color-white); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm);
    padding: 20px; display: flex; flex-direction: column; gap: 10px;
}
.post-sidebar__card img { border-radius: var(--radius-md); }
.post-sidebar__toc { font-size: 15px; display: flex; flex-direction: column; gap: 8px; }
.post-sidebar__toc-title {
    font-family: var(--font-mono); font-size: 13px; letter-spacing: .08em; text-transform: uppercase;
    color: var(--color-text-700);
}
.post-sidebar__toc a { color: var(--color-text); }

.related { margin-top: 56px; }
.related__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr)); gap: 20px; }
.related-card { display: flex; flex-direction: column; gap: 8px; color: var(--color-text); text-decoration: none; }
.related-card:hover { text-decoration: none; }
.related-card img, .related-card__placeholder {
    aspect-ratio: 4 / 3; border-radius: var(--radius-lg); object-fit: cover;
    background: var(--color-surface);
}
.related-card__title { font-family: var(--font-heading); font-weight: 600; font-size: 17px; }

.mobile-download-bar { display: none; }
@media (max-width: 819px) {
    .mobile-download-bar {
        display: block; position: fixed; left: 0; right: 0; bottom: 0; z-index: 50;
        padding: 12px 20px; background: var(--color-bg); box-shadow: 0 -2px 10px rgba(45, 43, 43, .12);
    }
    .post { padding-bottom: 72px; }
}

.post-locked__form { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; margin-top: 1rem; }
.post-locked__error { color: var(--color-error); }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-surface); margin-top: 48px; }
.site-footer__main {
    max-width: var(--content-max); margin: 0 auto; padding: 56px 32px 32px;
    display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap;
}
.site-footer__brand { display: flex; flex-direction: column; gap: 10px; max-width: 36ch; }
.site-footer__brand p { font-size: 17px; color: var(--color-text-800); margin: 0; }
.site-footer__columns { display: flex; gap: 56px; flex-wrap: wrap; font-size: 17px; }
.site-footer__col { display: flex; flex-direction: column; gap: 8px; }
.site-footer__col a { color: var(--color-text); }
.site-footer__bar {
    max-width: var(--content-max); margin: 0 auto; padding: 0 32px 32px;
    display: flex; justify-content: space-between; align-items: center;
    color: var(--color-text-700); font-size: 0.9rem;
}
.scroll-top {
    border: 1px solid var(--color-divider); background: var(--color-white); border-radius: 50%;
    width: 2.25rem; height: 2.25rem; cursor: pointer; font-size: 1rem; line-height: 1;
}

/* ---------- Home page ---------- */
.eyebrow {
    font-family: var(--font-mono); font-size: 14px; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--color-text-700);
}

.hero {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 360px), 1fr));
    gap: 48px; align-items: center; padding-bottom: 56px;
}
.hero__text { display: flex; flex-direction: column; gap: 24px; }
.hero__title { margin: 0; font-size: clamp(30px, 2.8vw, 40px); line-height: 1.1; letter-spacing: -0.02em; }
.hero__dot { color: var(--color-accent-2); }
.hero__lead { margin: 0; font-size: 20px; line-height: 1.5; max-width: 38ch; color: var(--color-text-800); }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero__today { width: 100%; max-width: 520px; }
.hero__today-head {
    display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 4px 16px;
    padding-bottom: 12px; border-bottom: 2px solid var(--color-accent);
    font-family: var(--font-heading); font-weight: 600; font-size: 22px; color: var(--color-heading);
}
.hero__today-date { font-family: var(--font-mono); font-size: 15px; color: var(--color-text-700); font-weight: 400; }
.today-row {
    display: grid; grid-template-columns: 12px minmax(0, 1fr) auto; align-items: center;
    gap: 6px 14px; padding: 12px 0; border-bottom: 1px solid var(--color-divider);
}
.today-row__body { display: flex; flex-direction: column; min-width: 0; gap: 2px; }
.today-row__meta { display: flex; align-items: center; gap: 8px; font-size: 15px; color: var(--color-text-700); }
.today-row__title { font-family: var(--font-heading); font-weight: 600; font-size: 19px; color: var(--color-heading); }
.today-row__actions a { font-size: 17px; color: var(--color-text-800); }

.section-head-row {
    display: flex; justify-content: space-between; align-items: flex-end;
    gap: 16px; flex-wrap: wrap; margin: 0 0 28px;
}
.section-head-row h2 { margin-top: 8px; }

.type-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
    gap: 20px; margin-bottom: 56px;
}
.type-tile {
    display: flex; flex-direction: column; border-radius: var(--radius-lg); overflow: hidden;
    background: var(--color-white); box-shadow: var(--shadow-sm); color: var(--color-text);
    text-decoration: none; transition: transform .15s ease, box-shadow .15s ease;
}
.type-tile:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); text-decoration: none; }
.type-tile__stage { aspect-ratio: 4 / 3; display: grid; place-items: center; padding: 24px; }
.type-tile__preview {
    width: 64%; aspect-ratio: 1; background: var(--color-white); box-shadow: var(--shadow-md);
    display: grid; place-items: center; padding: 8px; text-align: center;
    font-family: var(--font-mono); font-size: 12px; color: var(--color-text-700);
    background-image: repeating-linear-gradient(45deg, var(--color-bg) 0 8px, #fff 8px 16px);
}
.type-tile__footer { padding: 16px 18px; display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.type-tile__name { font-family: var(--font-heading); font-weight: 600; font-size: 20px; letter-spacing: -0.02em; }
.type-tile__count { font-family: var(--font-mono); font-size: 15px; color: var(--color-text-700); }

.difficulty-filter { display: flex; gap: 8px; flex-wrap: wrap; }
.difficulty-filter__chip {
    min-height: 40px; padding: 0 16px; border-radius: 999px; border: 1.5px solid var(--color-divider);
    background: var(--color-white); color: var(--color-text); font-family: var(--font-body);
    font-size: 16px; cursor: pointer;
}
.difficulty-filter__chip.is-active { background: var(--color-accent-700); border-color: var(--color-accent-700); color: #fff; }

.new-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 290px), 1fr));
    gap: 28px 24px; margin-bottom: 56px;
}
.new-card { display: flex; flex-direction: column; gap: 12px; }
.new-card__stage {
    position: relative; aspect-ratio: 5 / 4; background: var(--color-surface);
    border-radius: var(--radius-lg); overflow: hidden; display: grid; place-items: center;
}
.new-card__dots {
    position: absolute; inset: 0;
    background-image: radial-gradient(circle, var(--dot-color) 1.2px, transparent 1.6px);
    background-size: 9px 9px;
}
.new-card__sheet {
    position: relative; width: 46%; aspect-ratio: 8.5 / 11; background: var(--color-white);
    box-shadow: var(--shadow-md); overflow: hidden; display: flex;
}
.new-card__sheet img { width: 100%; height: 100%; object-fit: cover; }
.new-card__placeholder {
    width: 100%; height: 100%; display: grid; place-items: center; padding: 8px; text-align: center;
    font-family: var(--font-mono); font-size: 11px; color: var(--color-text-700);
    background-image: repeating-linear-gradient(45deg, var(--color-bg) 0 8px, #fff 8px 16px);
}
.tag-new {
    position: absolute; left: 14px; top: 14px; font-size: 14px; padding: 4px 10px;
    border-radius: calc(var(--radius-md) * 0.75); background: var(--color-accent-2-100); color: var(--color-accent-2-800);
}
.new-card__meta {
    display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap;
    font-size: 16px; color: var(--color-text-800);
}
.new-card__title { margin: 0; font-size: 21px; line-height: 1.2; letter-spacing: -0.015em; }
.new-card__title a { color: var(--color-heading); }
.new-card__actions { display: flex; gap: 10px; }
.new-card__actions .btn { flex: 1; min-height: 48px; font-size: 17px; padding: 0 16px; }

.audiences {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: 40px; margin-bottom: 56px;
}
.audiences__col { display: flex; flex-direction: column; gap: 10px; padding-top: 18px; border-top: 2px solid var(--color-accent); }
.audiences__col h3 { margin: 0; font-size: 22px; letter-spacing: -0.02em; }
.audiences__col p { margin: 0; font-size: 19px; color: var(--color-text-800); }