:root {
  color-scheme: light dark;
  --nyuhaku: #f3f3f3;
  --kuro: #2b2b2b;
  --background: var(--nyuhaku);
  --foreground: var(--kuro);
  --muted: color-mix(in srgb, var(--foreground) 65%, var(--background));
  --line: color-mix(in srgb, var(--foreground) 20%, var(--background));
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: var(--kuro);
    --foreground: var(--nyuhaku);
  }
}

body {
  max-width: 40rem;
  margin: 0 auto;
  padding: 3rem 1rem;
  background: var(--background);
  color: var(--foreground);
  font-family:
    "游ゴシック体",
    YuGothic,
    "游ゴシック Medium",
    "Yu Gothic Medium",
    "Yu Gothic",
    sans-serif;
  line-height: 1.7;
}

header {
  display: flex;
  align-items: center;
  gap: 1rem;
}

header img {
  border-radius: 50%;
}

header p {
  color: var(--muted);
}

h1 {
  margin: 0;
  font-size: 1.5rem;
  line-height: 1.3;
}

h2 {
  margin: 3rem 0 1rem;
  font-size: 1.125rem;
}

h3 {
  margin: 1.5rem 0 0.25rem;
  font-size: 1rem;
}

p,
ul {
  margin: 0;
}

ul {
  padding-left: 1.25rem;
}

li + li {
  margin-top: 0.5rem;
}

a {
  color: inherit;
}

.icon {
  flex: none;
  width: 1em;
  height: 1em;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  padding-left: 0;
  list-style: none;
}

.links li + li {
  margin-top: 0;
}

.links a,
.mail {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.mail {
  color: var(--muted);
}

.projects {
  padding-left: 0;
  list-style: none;
}

.projects li + li {
  margin-top: 1rem;
}

.projects a {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-weight: 700;
}

.projects p {
  color: var(--muted);
}

.timeline {
  padding-left: 0;
  list-style: none;
  font-variant-numeric: tabular-nums;
}

.timeline > li {
  position: relative;
  padding: 0 0 1.25rem 1.5rem;
}

.timeline > li + li {
  margin-top: 0;
}

.timeline > li::before {
  content: "";
  position: absolute;
  top: 0.375rem;
  left: 0;
  box-sizing: border-box;
  width: 0.75rem;
  height: 0.75rem;
  border: 2px solid var(--foreground);
  border-radius: 50%;
  background: var(--background);
}

.timeline > li:first-child::before {
  background: var(--foreground);
}

.timeline > li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: calc(0.375rem + 0.75rem);
  bottom: -0.375rem;
  left: calc(0.375rem - 1px);
  width: 2px;
  background: var(--line);
}

.timeline > li:last-child {
  padding-bottom: 0;
}

.timeline time {
  display: block;
  color: var(--muted);
  font-size: 0.875rem;
}

.timeline ul {
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.875rem;
}

.timeline ul li + li {
  margin-top: 0.125rem;
}