/* Shared styles for motohirokumagai.com. Plain CSS, no build step. */

:root {
  color-scheme: light;
  --color-text: #1f2328;
  --color-muted: #57606a;
  --color-link: #1a5a96;
  --color-link-hover: #0f3d68;
  --color-border: #e1e4e8;
  --content-width: 48rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background-color: #ffffff;
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  overflow-wrap: break-word;
}

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

a {
  color: var(--color-link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-link-hover);
  text-decoration-thickness: 2px;
}

a:focus-visible {
  outline: 3px solid var(--color-link);
  outline-offset: 2px;
  border-radius: 2px;
}

.container {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: 1rem;
}

/* Hidden above the page until reached with the keyboard. */
.skip-link {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 10;
  padding: 0.5rem 0.75rem;
  background-color: #ffffff;
  border: 2px solid var(--color-link);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

/* Header and navigation */

.site-header {
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  column-gap: 2rem;
  padding-block: 0.5rem;
}

.site-name {
  display: inline-block;
  padding-block: 0.5rem;
  color: var(--color-text);
  font-size: 1.125rem;
  font-weight: 600;
  text-decoration: none;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  column-gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: inline-block;
  padding-block: 0.5rem;
  color: var(--color-muted);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.4em;
}

/* Page content */

main {
  padding-block: 2.5rem 4rem;
}

h1,
h2 {
  margin: 0;
  font-weight: 600;
  line-height: 1.25;
}

h1 {
  margin-bottom: 1.25rem;
  font-size: 1.875rem;
}

h2 {
  margin-top: 2.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 1.3rem;
}

p {
  margin: 0 0 0.75rem;
}

/* Home */

.profile {
  display: grid;
  gap: 1.75rem;
}

.profile-photo {
  width: 10rem;
  border-radius: 4px;
}

.contact {
  margin-top: 1.5rem;
}

@media (min-width: 40rem) {
  .profile {
    grid-template-columns: 12.5rem minmax(0, 1fr);
    column-gap: 2.75rem;
    align-items: start;
  }

  .profile-photo {
    width: 100%;
  }
}

/* Research */

.paper-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.paper-list > li {
  margin-bottom: 1.5rem;
}

.paper-list p {
  margin: 0;
}

.paper-title {
  font-weight: 600;
}

/* Underline only the title text, not the space before the label. */
.paper-title a {
  text-decoration: none;
}

.paper-link {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.paper-title a:hover .paper-link {
  text-decoration-thickness: 2px;
}

.paper-detail {
  color: var(--color-muted);
}

/* Small "PDF" / "DOI" label inside a link; inline-block keeps it out of the underline. */
.link-type {
  display: inline-block;
  margin-left: 0.15em;
  padding: 0 0.35em;
  border: 1px solid currentColor;
  border-radius: 3px;
  font-size: 0.7em;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.5;
  vertical-align: 0.15em;
}