/* ---- Theme tokens ------------------------------------------------------- */
:root {
  --bg: #fffdf7;
  --panel: #f4eee0;
  --fg: #100d07;
  --muted: #5d564a;
  --line: #c7bda6;
  --accent: oklch(0.49 0.21 33);
  --boid: oklch(0.55 0.18 33);

  --serif: "EB Garamond", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16140f;
    --panel: #1e1b15;
    --fg: #f0ebe0;
    --muted: #948b7c;
    --line: #332e25;
    --accent: oklch(0.72 0.18 45);
    --boid: oklch(0.66 0.15 45);
  }
}

/* Explicit user choice wins over the OS preference. */
html[data-theme="light"] {
  --bg: #fffdf7;
  --panel: #f4eee0;
  --fg: #100d07;
  --muted: #5d564a;
  --line: #c7bda6;
  --accent: oklch(0.49 0.21 33);
  --boid: oklch(0.55 0.18 33);
}

html[data-theme="dark"] {
  --bg: #16140f;
  --panel: #1e1b15;
  --fg: #f0ebe0;
  --muted: #948b7c;
  --line: #332e25;
  --accent: oklch(0.72 0.18 45);
  --boid: oklch(0.66 0.15 45);
}

/* ---- Base --------------------------------------------------------------- */
* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
}

/* The canvas is fixed and click-through, so the page can scroll normally. */

a { color: var(--fg); text-decoration: none; }
a:hover { color: var(--accent); }

/* ---- Flock canvas ------------------------------------------------------- */
#flock {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  color: var(--boid); /* the script reads this as the boid fill colour */
  opacity: 0.5;
  pointer-events: none;
}

/* ---- Theme toggle ------------------------------------------------------- */
#theme-toggle {
  position: fixed;
  top: 28px;
  right: 32px;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 2px;
  cursor: pointer;
}

#theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

/* Show the icon of the theme currently in effect. */
#theme-toggle .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  #theme-toggle .icon-sun { display: none; }
  #theme-toggle .icon-moon { display: block; }
}
html[data-theme="light"] #theme-toggle .icon-sun { display: block; }
html[data-theme="light"] #theme-toggle .icon-moon { display: none; }
html[data-theme="dark"] #theme-toggle .icon-sun { display: none; }
html[data-theme="dark"] #theme-toggle .icon-moon { display: block; }

/* ---- Content ------------------------------------------------------------ */
main {
  position: relative;
  min-height: 100vh;
  padding: 96px 120px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: 76px;
  line-height: 1;
  letter-spacing: -0.015em;
  font-weight: 500;
}

.role {
  margin: 18px 0 0;
  font-family: var(--serif);
  font-size: 26px;
  line-height: 1.25;
  color: var(--muted);
}

.rule {
  width: 110px;
  height: 3px;
  margin: 40px 0 0;
  border: 0;
  background: var(--accent);
}

.summary {
  margin: 32px 0 0;
  max-width: 52ch;
  font-family: var(--serif);
  font-size: 21px;
  line-height: 1.55;
  text-wrap: pretty;
}

.cta { margin: 64px 0 0; }

.button {
  display: inline-block;
  font-family: var(--serif);
  font-size: 21px;
  line-height: 1.55;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 8px 24px;
}

.button:hover { color: var(--bg); background: var(--accent); }

.links {
  margin-top: clamp(64px, 12vh, 150px);
  display: flex;
  flex-wrap: wrap;
  gap: 14px 34px;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
}

.links a {
  border-bottom: 2px solid var(--accent);
  padding-bottom: 4px;
}

/* ---- Idle footnote ------------------------------------------------------ */
#footnote {
  position: fixed;
  right: 32px;
  bottom: 32px;
  z-index: 3;
  width: 330px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 2px;
  padding: 18px 20px 17px;
  animation: footnote-in 520ms ease both;
}

#footnote[hidden] { display: none; }

#footnote header {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

#footnote .label {
  flex: 1;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

#footnote-close {
  background: transparent;
  border: 0;
  padding: 0;
  font-size: 15px;
  line-height: 1;
  color: var(--muted);
  cursor: pointer;
}

#footnote-close:hover { color: var(--accent); }

#footnote p {
  margin: 10px 0 0;
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 1.5;
  text-wrap: pretty;
}

#footnote p.muted { color: var(--muted); }
#footnote a { border-bottom: 1px solid var(--accent); }

@keyframes footnote-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Small screens ------------------------------------------------------ */
@media (max-height: 820px) {
  main { padding: 72px 120px; }
  .cta { margin-top: 40px; }
  .links { margin-top: 48px; }
}

@media (max-width: 720px) {
  main { padding: 88px 28px 56px; }
  h1 { font-size: 46px; }
  .role { font-size: 20px; }
  .summary { font-size: 18px; }
  .button { font-size: 18px; }
  .links { margin-top: 56px; }
  #footnote { left: 20px; right: 20px; bottom: 20px; width: auto; }
}

@media (prefers-reduced-motion: reduce) {
  #footnote { animation: none; }
}