/* ============================================================
   Difficult Fun — static site styles
   Uses the design-system tokens (linked via ../styles.css).
   Three pages: index (home), manifesto, imprint.
   ============================================================ */

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

/* Boxed site: 1440px max, 30px side gutters (per Figma) */
:root { --gutter: 30px; }
.site {
  max-width: none;
  margin: 0 auto;
  position: relative;
}

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--surface-page);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: inherit; }

/* ---- Shared layout frame ----------------------------------- */
.frame {
  max-width: none;
  margin: 0 auto;
  padding-inline: var(--gutter);
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding: var(--space-6) var(--gutter);
}

/* On the home page the header overlays the hero. */
.site-header--overlay {
  position: absolute;
  inset: 0 0 auto 0;
  z-index: 10;
}

.site-header__logo { line-height: 0; display: inline-block; }
.site-header__logo img { width: 210px; height: auto; }

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  font-family: var(--font-display);
  font-weight: var(--fw-regular);
  font-size: 14px;
  letter-spacing: var(--tracking-tight);
  text-decoration: none;
  transition: opacity var(--dur-base) var(--ease-standard);
}
.nav-link:hover { text-decoration: underline; text-underline-offset: 3px; }

/* Pill button (the brand signature) */
.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  font-family: var(--font-display);
  font-weight: var(--fw-regular);
  font-size: 14px;
  line-height: 1;
  letter-spacing: var(--tracking-tight);
  border-radius: var(--radius-pill);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--dur-base) var(--ease-standard),
              color var(--dur-base) var(--ease-standard),
              opacity var(--dur-fast) var(--ease-standard);
}
.pill:active { opacity: var(--press-opacity); }

/* Light tone (white outline) — used on the dark hero */
.pill--light { color: var(--df-white); border: 1px solid var(--df-white); background: transparent; }
.pill--light:hover { background: var(--df-white); color: var(--df-black); }

/* Ink tone (black outline) — used on light pages */
.pill--ink { color: var(--df-ink); border: 1px solid var(--df-ink); background: transparent; }
.pill--ink:hover { background: var(--df-ink); color: var(--df-white); }

/* Header colour variants */
.site-header--light .nav-link { color: var(--df-white); }
.site-header--ink .nav-link { color: var(--df-ink); }

/* ============================================================
   HERO (home)
   ============================================================ */
.hero {
  position: relative;
  min-height: 92vh;
  background-color: var(--df-black);
  background-image: url("assets/images/hero-desktop.jpg");
  background-size: cover;
  background-position: center 38%;
  background-repeat: no-repeat;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.hero__claim {
  position: relative;
  z-index: 2;
  padding: var(--space-8) var(--gutter);
  margin: 0;
  max-width: 640px;
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  font-size: 24px;
  line-height: 32px;
  letter-spacing: var(--tracking-display);
  color: var(--df-white);
}

/* ============================================================
   CONTENT  (white → silver-grey wash)
   ============================================================ */
.content {
  background: linear-gradient(180deg, #ffffff 0%, #93989e 100%);
}

.content__inner {
  max-width: none;
  margin: 0 auto;
  padding: var(--space-9) var(--gutter) var(--space-10);
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 1fr);
  column-gap: 150px;
  align-items: start;
}

.content__main { grid-column: 1; grid-row: 1; min-width: 0; }
.content__aside { grid-column: 2; grid-row: 1; }

/* Big editorial questions */
.questions {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin: 0 0 var(--space-8);
}
.questions p {
  margin: 0;
  max-width: none;
  font-family: var(--font-display);
  font-weight: var(--fw-regular);
  font-size: 24px;
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-display);
  color: var(--text-primary);
}

/* Prose */
.prose {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  max-width: none;
}
.prose p {
  margin: 0;
  font-family: var(--font-body);
  font-weight: var(--fw-regular);
  font-size: 21px;
  line-height: var(--lh-body);
  color: var(--df-ink);
}

/* ---- Sidebar / detail panel -------------------------------- */
.detail-toggle { display: none; }

.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
}

.eyebrow {
  font-family: var(--font-ui);
  font-size: var(--type-label);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tracking-label);
  color: var(--df-ink);
  margin: 0 0 var(--space-4);
}

/* Sidebar labels use the display face per design review */
.sidebar .eyebrow {
  font-family: var(--font-display);
  font-weight: var(--fw-regular);
  font-size: 14px;
  letter-spacing: var(--tracking-tight);
}

.toc { display: flex; flex-direction: column; gap: var(--space-5); }
.toc__item { display: block; }
.toc__label {
  display: block;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: var(--fw-regular);
  letter-spacing: var(--tracking-tight);
  color: var(--df-ink);
  margin-bottom: 2px;
}
.toc__title {
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  font-size: 14px;
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

.aside-block p {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--type-small);
  line-height: var(--lh-body);
  color: var(--df-ink);
  max-width: 36ch;
}
.aside-link {
  color: inherit;
  text-decoration: none;
}
.aside-link:hover { text-decoration: underline; text-underline-offset: 3px; }
/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--surface-invert);
  color: var(--text-on-invert);
}
.site-footer__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-7);
  padding: var(--space-7) var(--gutter) var(--space-6);
}
.site-footer__blurb {
  margin: 0;
  max-width: 34ch;
  font-family: var(--font-body);
  font-size: var(--type-small);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
  color: var(--text-on-invert);
}
.site-footer__contact { display: flex; flex-direction: column; gap: var(--space-2); }
.site-footer__contact .site-footer__link {
  font-size: 21px;
  font-weight: var(--fw-regular);
}
.site-footer__legal { display: flex; justify-content: flex-end; }
.site-footer__link {
  font-family: var(--font-ui);
  font-size: var(--type-small);
  font-weight: var(--fw-regular);
  text-decoration: none;
  color: var(--text-on-invert);
  transition: opacity var(--dur-base) var(--ease-standard);
}
.site-footer__link:hover { text-decoration: underline; text-underline-offset: 3px; }
.site-footer__copy {
  margin-top: var(--space-8);
  padding: 0 var(--gutter) var(--space-6);
  font-family: var(--font-ui);
  font-size: var(--type-small);
  font-weight: var(--fw-light);
  color: var(--text-on-invert);
}

/* ============================================================
   RESPONSIVE  —  collapse sidebar into a "Detail information" layer
   ============================================================ */
@media (max-width: 860px) {
  .site-header { padding: var(--space-5) var(--gutter); }
  .site-header__nav { flex-direction: column-reverse; align-items: center; gap: var(--space-3); }
  .site-header__nav .nav-link { font-size: 12px; }
  .site-header__nav .pill { font-size: 12px; padding: 9px 18px; }
  .site-header__logo img { width: 165px; height: auto; }

  .hero {
    min-height: 100vh;
  }
  .hero__claim { font-size: 21px; line-height: 28px; max-width: 14ch; padding: var(--space-6) var(--gutter); }

  .content__inner {
    display: block;
    padding: 0 var(--gutter) var(--space-9);
  }

  /* The "Detail information" disclosure bar */
  .detail-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--space-4) 0;
    margin: 0;
    background: transparent;
    border: 0;
    border-bottom: 1px solid var(--line-hairline);
    font-family: var(--font-display);
    font-weight: var(--fw-regular);
    font-size: 10px;
    color: var(--text-primary);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
  }
  .detail-toggle__icon {
    width: 16px; height: 16px;
    transform: rotate(230deg);
    transition: transform var(--dur-base) var(--ease-standard);
  }
  .detail-toggle[aria-expanded="true"] .detail-toggle__icon { transform: rotate(320deg); }

  /* Sidebar becomes the collapsible layer */
  .sidebar {
    position: static;
    display: grid;
    grid-template-rows: 0fr;
    gap: 0;
    overflow: hidden;
    transition: grid-template-rows var(--dur-slow) var(--ease-standard);
  }
  .sidebar > * { min-height: 0; }
  .sidebar__rows {
    display: flex;
    flex-direction: column;
    gap: var(--space-7);
    overflow: hidden;
    padding-top: 0;
    transition: padding var(--dur-slow) var(--ease-standard);
  }
  .sidebar.is-open { grid-template-rows: 1fr; }
  .sidebar.is-open .sidebar__rows { padding: var(--space-6) 0 var(--space-7); }

  .aside-block p, .toc__title { max-width: none; }

  .questions { margin-top: var(--space-7); }
  .page-intro .eyebrow { font-size: 10px; }
  .questions p { max-width: none; font-size: 21px; }

  .site-footer__top { grid-template-columns: 1fr; gap: var(--space-5); padding-bottom: var(--space-5); }
  .site-footer__legal { justify-content: flex-start; }
}

/* Desktop: the .sidebar__rows wrapper is transparent to layout */
@media (min-width: 861px) {
  .sidebar__rows { display: contents; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; }
}

/* ============================================================
   INNER PAGES — Manifesto & Imprint
   ============================================================ */

/* Manifesto sits on the white → silver-grey wash (boxed) */
.page--soft { background: var(--surface-page); }
.page--soft .site { background: linear-gradient(180deg, #ffffff 0%, #93989e 100%); }

/* Imprint sits on the white → silver wash (boxed) */
.page--wash { background: var(--surface-page); }
.page--wash .site { background: linear-gradient(180deg, #ffffff 0%, #b9bdbf 100%); }

.page-intro {
  text-align: center;
  padding: var(--space-3) var(--gutter) var(--space-8);
}
.page-intro .eyebrow {
  margin: 0;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  font-size: 14px;
}

/* ---- Manifesto stanzas ---- */
.manifesto { padding-bottom: var(--space-9); }
.manifesto__row {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding: var(--space-7) 0;
}
.manifesto__row--left { align-items: flex-start; text-align: left; }
.manifesto__row--right { align-items: flex-end; text-align: right; }
.manifesto__row + .rule { margin: 0; }

.stanza {
  margin: 0;
  max-width: 32ch;
  font-family: var(--font-display);
  font-weight: var(--fw-regular);
  font-size: 36px;
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-display);
  color: var(--text-primary);
}

.rule {
  border: 0;
  height: 2px;
  width: 100%;
  background: var(--df-ink);
  margin: 0;
}

/* ---- Imprint ---- */
.imprint {
  max-width: 70ch;
  padding: var(--space-8) 0 var(--space-11);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.imprint h2 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 21px;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}
.imprint p {
  margin: 0;
  font-family: var(--font-body);
  font-weight: var(--fw-regular);
  font-size: 21px;
  line-height: var(--lh-body);
  color: var(--df-ink);
}

@media (max-width: 860px) {
  .stanza { font-size: var(--type-subtitle); max-width: 24ch; }
  .imprint { padding: var(--space-6) var(--gutter) var(--space-11); }
  .imprint p, .imprint h2 { font-size: 18px; }
}

/* True phone widths: swap to the portrait book image */
@media (max-width: 500px) {
  .hero {
    background-image: url("assets/images/book-mobile.jpg");
    background-position: center top;
  }
}

/* Wide screens (beyond the old 1440 frame): book composed with more room */
@media (min-width: 1441px) {
  .hero {
    background-image: url("assets/images/hero-widescreen.jpg");
  }
}