/* NATAKA Research Institute: shared styles.
   Layout: a quiet archive reading room. Deep purple masthead and footer, white pages,
   pale-gold bands for sections, brass gold for the brand name and the actions on purple.
   Trademark colours: deep purple #3F1962 and muted gold #E8D382.
   Georgia throughout (a system font, so nothing extra downloads on slow connections). */

:root {
  --purple: #3F1962;
  --gold: #E8D382;

  --bg: #FFFFFF;
  --sand: #F8F2DC;
  --fg: #22182E;
  --muted: #5E5470;
  --line: #E2D6B8;
  --heading: #3F1962;
  --accent: #5B2B8A;
  --btn: #3F1962;
  --btn-fg: #E8D382;
  --mast: #3F1962;
  --mast-fg: #FBF6E6;
  --mast-muted: #CDBEDD;
  --mast-line: #553079;
  --mast-brand: #E8D382;
  --mast-btn: #E8D382;
  --mast-btn-fg: #3F1962;
  --world-cosmobian: #3F1962;
  --world-resistance: #C9A94A;
  --world-synthobian: #8A8494;

  --serif: Georgia, "Times New Roman", Times, serif;
  --step--1: 0.875rem;
  --step0: 1.0625rem;
  --step1: 1.25rem;
  --step2: 1.6rem;
  --step3: 2.05rem;
  --step4: 2.75rem;
  --measure: 66ch;
  --wide: 72rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #160C22;
    --sand: #22142F;
    --fg: #EFE8D6;
    --muted: #B5A9C4;
    --line: #3A2752;
    --heading: #E8D382;
    --accent: #E8D382;
    --btn: #E8D382;
    --btn-fg: #3F1962;
    --mast: #2A1043;
    --mast-fg: #F4EDD8;
    --mast-muted: #B9A7CF;
    --mast-line: #3F1962;
    --mast-brand: #E8D382;
    --mast-btn: #E8D382;
    --mast-btn-fg: #3F1962;
    --world-cosmobian: #A98BD0;
    --world-resistance: #E8D382;
    --world-synthobian: #8F8A99;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #160C22;
  --sand: #22142F;
  --fg: #EFE8D6;
  --muted: #B5A9C4;
  --line: #3A2752;
  --heading: #E8D382;
  --accent: #E8D382;
  --btn: #E8D382;
  --btn-fg: #3F1962;
  --mast: #2A1043;
  --mast-fg: #F4EDD8;
  --mast-muted: #B9A7CF;
  --mast-line: #3F1962;
  --mast-brand: #E8D382;
  --mast-btn: #E8D382;
  --mast-btn-fg: #3F1962;
  --world-cosmobian: #A98BD0;
  --world-resistance: #E8D382;
  --world-synthobian: #8F8A99;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--serif);
  font-size: var(--step0);
  line-height: 1.65;
}

img { max-width: 100%; height: auto; }

a { color: var(--accent); text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.wrap {
  max-width: var(--wide);
  margin-inline: auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
@media (min-width: 760px) {
  .wrap {
    padding-left: max(32px, env(safe-area-inset-left, 0px));
    padding-right: max(32px, env(safe-area-inset-right, 0px));
  }
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 20;
  background: var(--bg);
  color: var(--accent);
  padding: 0.5rem 0.75rem;
}

/* Type */
h1, h2, h3 { color: var(--heading); font-weight: normal; text-wrap: balance; }
h1 { font-size: clamp(2rem, 5vw, var(--step4)); line-height: 1.15; margin: 0 0 1rem; }
h2 { font-size: clamp(1.6rem, 3.6vw, var(--step3)); line-height: 1.2; margin: 0 0 1rem; }
h3 { font-size: var(--step1); line-height: 1.3; margin: 0 0 0.4rem; font-weight: bold; }
p, li, dd { max-width: var(--measure); }
p { margin: 0 0 1rem; }
ul, ol { padding-left: 1.3rem; margin: 0 0 1rem; }
li + li { margin-top: 0.35rem; }

.eyebrow {
  font-size: var(--step--1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.75rem;
}
.lead { font-size: var(--step1); line-height: 1.55; }
.muted { color: var(--muted); }
.small { font-size: var(--step--1); }
.placeholder { color: var(--muted); font-style: italic; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.65rem 1.15rem;
  border: 2px solid transparent;
  border-radius: 2px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: bold;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
}
.btn-primary { background: var(--btn); color: var(--btn-fg); }
.btn-primary:hover { filter: brightness(1.12); }
.btn-secondary { border-color: var(--heading); color: var(--heading); background: transparent; }
.btn-secondary:hover { background: var(--sand); }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }

/* Masthead */
.site-header { background: var(--mast); color: var(--mast-fg); }
.header-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 0.9rem;
}
.brand { color: var(--mast-fg); text-decoration: none; line-height: 1.1; }
.brand-name { display: block; font-size: 1.5rem; letter-spacing: 0.12em; color: var(--mast-brand); }
.site-header .btn-primary { background: var(--mast-btn); color: var(--mast-btn-fg); }
.site-header :focus-visible, .site-footer :focus-visible { outline-color: var(--mast-brand); }
.brand-sub {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mast-muted);
  margin-top: 0.2rem;
}
.header-tools { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 1rem; }
.lang { font-size: var(--step--1); color: var(--mast-muted); }
.lang strong { color: var(--mast-fg); font-weight: normal; }
.signin { color: var(--mast-fg); font-size: 0.95rem; }
.menu-btn {
  display: none;
  font: inherit;
  font-size: 0.95rem;
  color: var(--mast-fg);
  background: transparent;
  border: 1px solid var(--mast-muted);
  border-radius: 2px;
  padding: 0.45rem 0.8rem;
  cursor: pointer;
}

.site-nav { border-top: 1px solid var(--mast-line); }
.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.4rem;
}
.site-nav li + li { margin-top: 0; }
.site-nav a {
  display: block;
  padding: 0.7rem 0 0.6rem;
  color: var(--mast-fg);
  text-decoration: none;
  font-size: 0.97rem;
  border-bottom: 3px solid transparent;
}
.site-nav a:hover { border-bottom-color: var(--mast-muted); }
.site-nav a[aria-current="page"] { border-bottom-color: var(--mast-fg); }

@media (max-width: 760px) {
  .js .menu-btn { display: inline-block; }
  .js .site-nav { display: none; }
  .js .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; padding-block: 0.4rem; }
  .site-nav a { padding: 0.55rem 0; border-bottom: 0; border-left: 3px solid transparent; padding-left: 0.6rem; }
  .site-nav a[aria-current="page"] { border-left-color: var(--mast-fg); }
}

/* Bands and page sections */
.band { padding-block: 3.5rem; }
.band-sand { background: var(--sand); }
.band + .band:not(.band-sand) { border-top: 1px solid var(--line); }
.section-intro { margin-bottom: 1.75rem; }

.hero { padding-block: 4rem 3.25rem; }
.hero h1 { max-width: 22ch; }

.page-head { background: var(--sand); padding-block: 2.75rem 2.25rem; border-bottom: 1px solid var(--line); }
.page-head h1 { margin-bottom: 0.5rem; }
.page-head .lead { margin: 0; color: var(--fg); }

.prose { padding-block: 2.5rem 3.5rem; }
.prose > section + section { margin-top: 3rem; padding-top: 2.5rem; border-top: 1px solid var(--line); }
.prose h3 { margin-top: 1.75rem; }
section[id] { scroll-margin-top: 1rem; }

.grid { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.grid > * { min-width: 0; }

.panel { background: var(--bg); border: 1px solid var(--line); padding: 1.25rem 1.35rem; }
.panel h3 { margin-top: 0; }
.panel p:last-child { margin-bottom: 0; }

.draft-note {
  background: var(--sand);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  padding: 0.85rem 1.1rem;
  font-size: var(--step--1);
  max-width: var(--measure);
  margin: 0 0 2rem;
}
.draft-note p { margin: 0; }

/* Three worlds */
.worlds { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
.world {
  background: var(--bg);
  border: 1px solid var(--line);
  border-top: 5px solid var(--world-color, var(--heading));
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
}
.world--cosmobian { --world-color: var(--world-cosmobian); }
.world--resistance { --world-color: var(--world-resistance); }
.world--synthobian { --world-color: var(--world-synthobian); }
.world h3 { margin: 0; font-size: 1.4rem; font-weight: normal; }
.world p { margin: 0; }
.world-count { margin-top: auto; padding-top: 0.75rem; border-top: 1px solid var(--line); display: flex; align-items: baseline; gap: 0.5rem; }
.world-count .num { font-size: 2.2rem; line-height: 1; color: var(--heading); font-variant-numeric: tabular-nums; }
.world-count .lbl { font-size: var(--step--1); color: var(--muted); }

/* Regions */
.regions {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.6rem;
  grid-template-columns: repeat(auto-fill, minmax(12rem, 1fr));
}
.regions li + li { margin-top: 0; }
.regions a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.9rem 1rem;
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--heading);
  text-decoration: none;
  font-size: 1.05rem;
}
.regions a:hover { border-color: var(--accent); }
.regions .arrow { color: var(--accent); }

/* Lists of principles */
.rules { list-style: none; padding: 0; display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); }
.rules li { margin: 0; }
.rules strong { display: block; color: var(--heading); font-size: 1.1rem; margin-bottom: 0.25rem; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 0 0 1.5rem; }
table { border-collapse: collapse; width: 100%; font-size: 0.97rem; }
caption { text-align: left; color: var(--muted); font-size: var(--step--1); padding-bottom: 0.4rem; }
th, td { text-align: left; vertical-align: top; padding: 0.65rem 0.8rem 0.65rem 0; border-bottom: 1px solid var(--line); }
thead th { color: var(--heading); border-bottom: 2px solid var(--heading); }
tbody th { color: var(--heading); width: 30%; min-width: 10rem; }
td { min-width: 12rem; }

/* In-page contents */
.toc { list-style: none; padding: 0; margin: 1.5rem 0 0; display: flex; flex-wrap: wrap; gap: 0.35rem 1.2rem; font-size: 0.97rem; }
.toc li + li { margin-top: 0; }

/* Organisation chart */
.org { display: grid; gap: 0.6rem; margin: 1.5rem 0 2rem; }
.org-box { border: 1px solid var(--line); background: var(--bg); padding: 0.9rem 1rem; text-align: center; }
.org-box strong { display: block; color: var(--heading); }
.org-box span { display: block; font-size: var(--step--1); color: var(--muted); }
.org-box.top { border: 2px solid var(--heading); }
.org-down { text-align: center; color: var(--muted); line-height: 1; }
.org-row { display: grid; gap: 0.6rem; grid-template-columns: repeat(auto-fit, minmax(10.5rem, 1fr)); }

/* Forms */
.field { margin-bottom: 1rem; max-width: 34rem; }
label { display: block; font-weight: bold; margin-bottom: 0.3rem; color: var(--heading); }
input[type="email"], input[type="text"], textarea, select {
  width: 100%;
  font: inherit;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--muted);
  border-radius: 2px;
  background: var(--bg);
  color: var(--fg);
}
textarea { min-height: 9rem; resize: vertical; }
.signup { display: flex; flex-wrap: wrap; gap: 0.6rem; max-width: 34rem; align-items: end; }
.signup .field { flex: 1 1 15rem; margin: 0; min-width: 0; }
.hp { position: absolute; left: -9999px; }
.form-status { color: var(--accent); margin-top: 0.75rem; min-height: 1.5em; }

/* Footer */
.site-footer { background: var(--mast); color: var(--mast-fg); padding-block: 2.75rem 2.25rem; }
.site-footer a { color: var(--mast-fg); }
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
  display: grid;
  gap: 0.45rem 1.5rem;
  grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr));
  font-size: 0.95rem;
}
.footer-links li + li { margin-top: 0; }
.footer-line { font-size: var(--step--1); color: var(--mast-muted); border-top: 1px solid var(--mast-line); padding-top: 1.25rem; max-width: none; }
.footer-motto { font-style: italic; margin: 0; }