/* ============================================================
   VISIONS — visions.land
   DESIGN SYSTEM — SINGLE SOURCE OF TRUTH
   All colors, fonts, radii, etc. are defined here and only here.
   The structure is carried over from the chapter sites
   (2025.visions.land, 2026.visions.land); the palette is not.
   Those sites each own a hue — amber for 2025, blue for 2026.
   The hub owns none, so it still reads as the institution when a
   fourth chapter arrives in a colour nobody has picked yet.
   To restyle the site, edit the :root block.
   ============================================================ */

:root {
  /* Fonts */
  --font-sans: ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji",
    "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  /* Simplified-Chinese stack. The Latin stack would fall back per glyph
     anyway, but naming SC faces explicitly — together with lang="zh-Hans"
     on the page — stops a Japanese face resolving for shared ideographs. */
  --font-cjk: ui-sans-serif, system-ui, "PingFang SC", "Hiragino Sans GB",
    "Source Han Sans SC", "Noto Sans SC", "Noto Sans CJK SC",
    "Microsoft YaHei", "Heiti SC", sans-serif;

  --background: #09090b;
  --foreground: #ffffff;

  --card: #09090b;
  --card-foreground: #ffffff;
  --card-border: #3f3f46;

  --primary: #fafafa;
  --primary-foreground: #09090b;

  --secondary: #d4d4d8;
  --secondary-foreground: #09090b;

  --muted: #52525b;
  --muted-foreground: #a1a1aa;

  --accent: #e4e4e7;
  --accent-foreground: #18181b;

  --border: #27272a;
  --ring: #a1a1aa;

  --radius: 0.5rem;
}

/* ----------------------------------------------------------
   RESET
   ---------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
  border: 0 solid var(--border);
}

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  line-height: 1.5;
}

body {
  background-color: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  line-height: inherit;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

button {
  font-family: inherit;
  font-size: 100%;
  line-height: inherit;
  color: inherit;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--foreground);
}

ul {
  padding: 0;
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

/* ----------------------------------------------------------
   LAYOUT
   ---------------------------------------------------------- */

.page {
  min-height: 100vh;
  background-color: var(--background);
}

.container {
  width: 100%;
  margin-inline: auto;
  padding: 4rem 1rem;
}

@media (min-width: 640px) {
  .container {
    max-width: 640px;
  }
}
@media (min-width: 768px) {
  .container {
    max-width: 768px;
  }
}
@media (min-width: 1024px) {
  .container {
    max-width: 1024px;
  }
}
@media (min-width: 1280px) {
  .container {
    max-width: 1280px;
  }
}
@media (min-width: 1400px) {
  .container {
    max-width: 1400px;
  }
}

/* ----------------------------------------------------------
   MASTHEAD
   ---------------------------------------------------------- */

.masthead {
  text-align: center;
  margin-bottom: 3rem;
}

/* A block-level anchor gives the logo a stable containing block, so the
   percentage widths below resolve against the container rather than against
   a shrink-to-fit box. */
.masthead a {
  display: block;
  text-decoration: none;
}

.masthead img {
  width: 100%;
  max-width: 42rem;
  margin-inline: auto;
  object-fit: contain;
}

.masthead--visions img {
  --logo-scale: 2.54545;
  width: calc(100% / var(--logo-scale));
  max-width: calc(42rem / var(--logo-scale));
}

/* ----------------------------------------------------------
   CARD
   ---------------------------------------------------------- */

.card-wrap {
  max-width: 42rem;
  margin-inline: auto;
}

.card {
  padding: 1.5rem;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--card-border);
  background-color: var(--card);
  color: var(--card-foreground);
  box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  transition: box-shadow 0.15s ease-in-out;
}

.card:hover {
  box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

.card-header {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  padding: 1.5rem 1.5rem 2rem;
  text-align: center;
}

.card-hero {
  margin-inline: auto;
  margin-bottom: 1.5rem;
  width: 100%;
  max-width: 28rem;
  overflow: hidden;
  border-radius: var(--radius);
}

/* The hero is cropped at every viewport: the box is wider than the image's
   2:1 ratio on desktop (cropping top/bottom) and narrower than it on a phone
   in portrait (cropping left/right). Anchoring to the right edge keeps the
   right-hand side of the picture in frame when the crop is horizontal, while
   leaving the vertical crop centred as before. */
.card-hero img {
  width: 100%;
  height: 12rem;
  object-fit: cover;
  object-position: 100% 50%;
}

.card-title {
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.025em;
}

.card-content {
  padding: 0 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ----------------------------------------------------------
   PROSE
   ---------------------------------------------------------- */

.prose {
  color: var(--muted-foreground);
  text-align: justify;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.prose--tight {
  gap: 0.75rem;
}

.prose p,
.prose li {
  text-align: justify;
}

/* Inline code. The background is the same gray as --border, so code chips sit
   on the one neutral the design system already defines. Sized in `em` so the
   chip tracks whatever text it is embedded in, including the smaller FAQ
   panels. */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: var(--primary);
  background-color: var(--border);
  border-radius: calc(var(--radius) - 2px);
  padding: 0.15em 0.4em;
  /* Paths and commands are single long tokens; let them break rather than
     overflow the card on narrow viewports. */
  overflow-wrap: break-word;
  /* ...but break them on their own boundaries, never with a hyphen inserted
     into a command. */
  hyphens: none;
  -webkit-hyphens: none;
}

.note {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  text-align: justify;
}

.disc {
  list-style: disc;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.plain {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.lead-in {
  margin-bottom: 0.5rem;
}

/* ----------------------------------------------------------
   BUTTONS
   ---------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  white-space: nowrap;
  border-radius: calc(var(--radius) - 2px);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease-in-out;
  height: 2.75rem;
  padding-inline: 2rem;
}

.btn--block {
  width: 100%;
  display: flex;
}

.btn--primary {
  background-color: var(--primary);
  color: var(--primary-foreground);
}

/* The chapter sites brighten the primary button on hover. This palette's
   primary is already near-white, so brightness(1.1) is invisible; step down
   to the secondary instead, which registers. */
.btn--primary:hover {
  background-color: var(--secondary);
  color: var(--primary-foreground);
}

.btn--outline {
  border: 1px solid var(--card-border);
  background-color: var(--background);
  color: var(--foreground);
}

.btn--outline:hover {
  background-color: var(--accent);
  color: var(--accent-foreground);
  filter: brightness(1.1);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  pointer-events: none;
  opacity: 0.5;
}

.btn-link {
  display: block;
  text-decoration: none;
}

/* ----------------------------------------------------------
   FOOTER
   ---------------------------------------------------------- */

.footer {
  max-width: 42rem;
  margin: 2rem auto 0;
  text-align: center;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.footer a {
  color: inherit;
}

/* ----------------------------------------------------------
   HUB COMPONENTS
   The chapter sites are one card on one page. The hub indexes
   things, so it needs structures they do not have: more than
   one card per page, a language bar, and two kinds of list.
   ---------------------------------------------------------- */

.card + .card {
  margin-top: 2rem;
}

.section-title {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* ---------- language bar ----------

   Each language is a real generated page, so switching is three ordinary
   links and needs no JavaScript. The current language is a <span>, not a
   link to itself. */

.langbar {
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 1rem;
  margin-top: 1.25rem;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
}

.langbar a,
.langbar span {
  text-decoration: none;
  color: var(--muted-foreground);
  opacity: 0.6;
  transition: opacity 0.15s ease-in-out, color 0.15s ease-in-out;
}

.langbar a:hover {
  opacity: 1;
  color: var(--foreground);
}

.langbar [aria-current="page"] {
  opacity: 1;
  color: var(--foreground);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- chapter archive ---------- */

.chapter-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Each entry borrows the primary colour of its own chapter's site, handed in
   by the build as --chapter-accent, so the archive reads as a row of coloured
   spines on an otherwise hue-free page. A chapter without one falls back to
   the neutral border the rest of the hub uses. */
.chapter {
  display: block;
  padding: 1rem;
  text-decoration: none;
  border: 1px solid var(--chapter-accent, var(--border));
  border-radius: calc(var(--radius) - 2px);
  transition: border-color 0.15s ease-in-out, background-color 0.15s ease-in-out;
}

/* The border is already the accent at rest, so hover cannot signal by changing
   it. A faint wash does the work instead, and still reads on the entries that
   have no accent. */
.chapter:hover {
  border-color: var(--chapter-accent, var(--card-border));
  background-color: rgb(255 255 255 / 0.04);
  color: var(--foreground);
}

.chapter__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.75rem;
}

.chapter__title {
  font-weight: 600;
}

.chapter__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted-foreground);
}

/* A single line of description, so unlike .prose it must not be justified. */
.chapter__note {
  display: block;
  margin-top: 0.375rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
  text-align: left;
}

/* A chapter whose site is not online yet. The build renders it as a <div>
   rather than an <a>, so there is nothing to click and nothing to focus;
   this mirrors how .btn[aria-disabled] reads. */
.chapter--soon {
  pointer-events: none;
  opacity: 0.5;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.15em 0.45em;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 4px);
  color: var(--muted-foreground);
}

/* ---------- the collection ---------- */

.work-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  /* The reset zeroes <ul> only; this list is an <ol>, because the order
     (newest acquisition first) is part of what it says. */
  padding: 0;
  list-style: none;
}

.work {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.work-list > li:first-child .work {
  padding-top: 0;
  border-top: 0;
}

.work__title {
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.4;
}

.work__meta {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  margin-top: 0.75rem;
  font-size: 0.875rem;
}

.work__row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.75rem;
}

.work__meta dt {
  flex: 0 0 9rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted-foreground);
  padding-top: 0.2em;
}

.work__meta dd {
  flex: 1 1 12rem;
}

.work__note {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
  text-align: left;
}

/* ---------- contacts ---------- */

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact__address {
  font-weight: 600;
}

.contact__role {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

/* ----------------------------------------------------------
   NARROW VIEWPORTS (phone, portrait)
   ---------------------------------------------------------- */

/* Justified text only looks right when the measure is wide enough for the
   browser to absorb the slack of each line into the word-gaps unnoticed. In
   portrait the three nested gutters (container + card + card-content) spend
   ~160px of a ~390px viewport, leaving a ~230px measure — around 30 characters
   per line, where a single long word tears a visible river open.

   Three things widen the measure in characters: narrower gutters, type that
   scales down with the viewport, and hyphenation, which gives the justifier
   break points *inside* long words. The last is what actually closes the gaps;
   it relies on <html lang="en">, which the pages set. */
@media (max-width: 640px) {
  .container {
    padding-inline: 0.75rem;
  }

  .card {
    padding: 0.75rem;
  }

  .card-header {
    padding: 0.75rem 0.75rem 1.5rem;
  }

  .card-content {
    padding: 0 0.75rem 0.75rem;
  }

  /* ~13px at 390px wide, growing to the full 16px by the time the viewport is
     roughly 470px, where the measure no longer needs the help. */
  .prose,
  .note {
    font-size: clamp(0.8125rem, 3.4vw, 1rem);
  }

  .prose p,
  .prose li,
  .note {
    hyphens: auto;
    -webkit-hyphens: auto;
    hyphenate-limit-chars: 6 3 3;
  }

  /* A last resort for anything the hyphenator cannot break, such as a URL:
     overflow rather than a line with two words on it. */
  .prose p,
  .prose li {
    overflow-wrap: break-word;
  }

  .card-title {
    font-size: 1.625rem;
  }
}

/* ----------------------------------------------------------
   CHINESE TYPOGRAPHY

   The rules above are tuned for Latin text. Han glyphs are full-width and
   need different treatment, and the narrow-viewport block in particular is
   actively wrong for them: it turns on automatic hyphenation, which CJK
   never uses, and drops the type to 13px, below which Han is illegible.

   These selectors carry an attribute and a class, so they outrank the
   rules they correct regardless of source order.
   ---------------------------------------------------------- */

html[lang="zh-Hans"] {
  font-family: var(--font-cjk);
}

html[lang="zh-Hans"] .prose p,
html[lang="zh-Hans"] .prose li,
html[lang="zh-Hans"] .note,
html[lang="zh-Hans"] .chapter__note,
html[lang="zh-Hans"] .work__note {
  /* CJK justifies natively and well, so text-align: justify stays. */
  line-height: 1.85;
  hyphens: none;
  -webkit-hyphens: none;
  word-break: normal;
  line-break: strict;
}

html[lang="zh-Hans"] .card-title,
html[lang="zh-Hans"] .section-title,
html[lang="zh-Hans"] .work__title {
  /* The Latin -0.025em tracking crowds Han glyphs. */
  letter-spacing: normal;
  line-height: 1.5;
}

@media (max-width: 640px) {
  html[lang="zh-Hans"] .prose p,
  html[lang="zh-Hans"] .prose li,
  html[lang="zh-Hans"] .note {
    hyphens: none;
    -webkit-hyphens: none;
    font-size: clamp(0.875rem, 3.6vw, 1rem);
  }
}

/* ----------------------------------------------------------
   NARROW VIEWPORTS — HUB COMPONENTS
   ---------------------------------------------------------- */

@media (max-width: 640px) {
  /* Two columns of field/value do not fit a phone; stack them. */
  .work__meta dt {
    flex: 1 0 100%;
  }

  .work__meta dd {
    flex: 1 0 100%;
  }
}

/* ----------------------------------------------------------
   ACCESSIBILITY
   ---------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto !important;
  }
}