/* REVIEWED: 기존 Simple List의 읽기 화면·명암·여백을 웹 문서에 적용한다. */
:root {
  color-scheme: light;
  --background: #f4f5f7;
  --surface: #fafafb;
  --ink: #282b30;
  --muted: #636872;
  --action: #465e76;
  --on-action: #fafafb;
  --line: #d9dde2;
  --selection: #e5ebf1;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 100%;
  scrollbar-color: var(--action) var(--background);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --background: #181b20;
    --surface: #24282f;
    --ink: #eceef1;
    --muted: #b9bec8;
    --action: #b8cde2;
    --on-action: #181b20;
    --line: #424852;
    --selection: #323e4c;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --background: #181b20;
  --surface: #24282f;
  --ink: #eceef1;
  --muted: #b9bec8;
  --action: #b8cde2;
  --on-action: #181b20;
  --line: #424852;
  --selection: #323e4c;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--background); color: var(--ink); font-size: 1.0625rem; line-height: 1.75; }
::selection { background: var(--selection); color: var(--ink); }
a { color: var(--action); text-underline-offset: .22em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--action); outline-offset: 4px; }
header, main, footer { width: min(100% - 3rem, 70ch); margin-inline: auto; }
header { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem 1.5rem; padding-block: 1.25rem; border-bottom: 1px solid var(--line); }
.brand { font-size: 1.25rem; font-weight: 650; color: var(--ink); text-decoration: none; margin-inline-end: auto; }
nav { display: flex; flex-wrap: wrap; gap: .125rem .75rem; }
header a, .contents a, .service-links a { display: inline-flex; min-height: 44px; align-items: center; }
header a { text-decoration: none; }
header [aria-current] { text-decoration: underline; font-weight: 600; }
.languages { width: 100%; }
main { padding-block: 2.5rem 4rem; }
h1 { font-size: clamp(2rem, 1.65rem + 1vw, 2.5rem); line-height: 1.3; letter-spacing: -.02em; margin: 0 0 1rem; font-weight: 650; }
h2 { font-size: 1.25rem; line-height: 1.5; margin: 3rem 0 .5rem; font-weight: 650; scroll-margin-top: 1.5rem; }
p { margin: .5rem 0 1rem; }
.intro { margin-bottom: 1.5rem; }
.muted { color: var(--muted); }
.updated { font-variant-numeric: tabular-nums; }
.contact { display: inline-flex; justify-content: center; align-items: center; min-height: 48px; padding: .625rem 1.125rem; background: var(--action); color: var(--on-action); border-radius: 8px; font-weight: 600; text-decoration: none; }
.contact:hover { text-decoration: underline; }
.email { overflow-wrap: anywhere; font-size: .9375rem; color: var(--muted); }
.contents { margin-block: 1.5rem 2rem; display: grid; gap: .375rem; }
.service-links { padding-inline-start: 1.125rem; margin-block: 2rem 0; }
footer { padding-block: 1.5rem 2rem; border-top: 1px solid var(--line); color: var(--muted); }
footer > p, footer > label { font-size: .9375rem; }
footer label { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; }
select { min-height: 44px; font: inherit; padding: .375rem 2rem .375rem .75rem; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 8px; }
.skip { position: absolute; inset-inline-start: 1rem; top: -10rem; padding: .75rem 1rem; background: var(--surface); z-index: 1; }
.skip:focus { top: 1rem; }
@media (max-width: 480px) {
  header, main, footer { width: min(100% - 2rem, 70ch); }
  main { padding-top: 2rem; }
  .brand { width: 100%; }
}