:root {
  color-scheme: dark;
  --surface: #000000;
  --surface-2: #0f0f0f;
  --surface-3: #1a1a1a;
  --ink: #ffffff;
  --muted: #b3b3b3;
  --border: #3a3a3a;
  --accent: #ffffff;
  --control-bg: var(--accent);
  --control-ink: #000000;
  --control-border: var(--accent);
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  --fs-base: 14px;
  --lh-base: 1.5;
  --h1-size: 32px;
  --h1-weight: 700;
  --h1-tracking: 0.04em;
  --h2-size: 18px;
  --h2-weight: 600;
  --label-size: 12px;
  --label-tracking: 0.08em;
  --radius: 0px;
  --border-width: 1px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 28px;
  --seq-1: #15223f;
  --seq-2: #1e3a6d;
  --seq-3: #275aa5;
  --seq-4: #2f85d3;
  --seq-5: #6bb6ff;
  --seq-6: #f3d35c;
  --seq-7: #f0a23b;
  --seq-8: #d45a33;
  --seq-9: #b5292e;
  --div-1: #053061;
  --div-2: #2166ac;
  --div-3: #4393c3;
  --div-4: #92c5de;
  --div-5: #f7f7f7;
  --div-6: #f4a582;
  --div-7: #d6604d;
  --div-8: #b2182b;
  --div-9: #67001f;
}

body.theme-invert {
  color-scheme: light;
  --surface: #ffffff;
  --surface-2: #f4f4f4;
  --surface-3: #e9e9e9;
  --ink: #111111;
  --muted: #4a4a4a;
  --border: #d9d9d9;
  --accent: #000000;
  --control-bg: var(--accent);
  --control-ink: #ffffff;
  --control-border: var(--accent);
}

* { box-sizing: border-box; border-radius: 0; }

html, body { min-height: 100%; }

body {
  min-height: 100dvh;
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
}

button, a { font: inherit; }

.link-tree {
  width: min(100% - 56px, 560px);
  min-height: 100dvh;
  margin: 0 auto;
  padding: 48px 0 28px;
}

.masthead { border-bottom: var(--border-width) solid var(--border); padding-bottom: var(--space-5); }

.title, .footer, h2 {
  margin: 0;
  color: var(--muted);
  font-size: var(--label-size);
  letter-spacing: var(--label-tracking);
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: var(--h1-size);
  font-weight: var(--h1-weight);
  letter-spacing: var(--h1-tracking);
  line-height: 1.2;
  text-transform: uppercase;
}

.title-row { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); }

.title { margin-top: var(--space-2); }

.theme-toggle {
  display: grid;
  flex: 0 0 36px;
  width: 36px;
  min-height: 36px;
  padding: 0;
  place-items: center;
  border: var(--border-width) solid var(--control-border);
  background: var(--control-bg);
  color: var(--control-ink);
  cursor: pointer;
  font-size: 16px;
}

.theme-toggle:hover { text-decoration: underline; text-underline-offset: 3px; }

.link-group { margin-top: 28px; }

h2 { font-size: var(--label-size); font-weight: var(--h2-weight); }

.link-list { display: grid; gap: var(--space-2); margin: var(--space-3) 0 0; padding: 0; list-style: none; }

.link-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  padding: var(--space-3);
  border: var(--border-width) solid var(--border);
  background: var(--surface);
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
  transition: color 120ms linear, border-color 120ms linear;
}

.link-row:hover { border-color: var(--ink); text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 3px; }

.link-label { display: inline-flex; align-items: center; min-width: 0; gap: var(--space-2); }

.link-icon { position: relative; display: inline-block; flex: 0 0 16px; width: 16px; height: 16px; }

.link-icon img { position: absolute; inset: 0; display: block; width: 16px; height: 16px; }
body:not(.theme-invert) .link-icon .icon-light { display: none !important; }
body.theme-invert .link-icon .icon-dark { display: none !important; }
body.theme-invert .link-icon .icon-light { display: block !important; }

.link-indicator { flex: 0 0 auto; margin-left: var(--space-4); color: var(--muted); font-size: 18px; font-weight: 400; }

.footer { display: flex; justify-content: space-between; gap: var(--space-3); margin-top: 28px; padding-top: var(--space-4); border-top: var(--border-width) solid var(--border); font-size: 12px; }

.footer a { color: inherit; text-decoration: none; }
.footer a:hover { text-decoration: underline; text-underline-offset: 3px; }

:focus-visible { outline: 2px solid currentColor; outline-offset: 2px; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 719px) {
  .link-tree { width: min(100% - 32px, 560px); padding-top: 28px; }
}

@media (max-width: 479px) {
  h1 { font-size: 24px; }
}

@media (max-height: 900px) {
  .link-tree { padding: var(--space-4) 0 var(--space-3); }
  .masthead { padding-bottom: var(--space-3); }
  .title { margin-top: var(--space-1); }
  .link-group { margin-top: var(--space-4); }
  .link-list { gap: var(--space-1); margin-top: var(--space-2); }
  .link-row { min-height: 36px; padding: var(--space-2) var(--space-3); }
  .link-icon, .link-icon img { width: 16px; height: 16px; }
  .footer { margin-top: var(--space-4); padding-top: var(--space-3); }
}

@media (max-height: 640px) {
  .link-tree { padding: var(--space-2) 0; }
  .masthead { padding-bottom: var(--space-2); }
  .title { display: none; }
  .link-group { margin-top: var(--space-2); }
  .link-list { margin-top: var(--space-1); }
  .link-row { min-height: 32px; padding: var(--space-1) var(--space-3); }
  .footer { margin-top: var(--space-2); padding-top: var(--space-2); }
}