/* ---------------------------------------------------------------
   Personal site — Mohammadreza Ahmadnejadsaein
   Edit the values in :root below to change colors and width.
   --------------------------------------------------------------- */

:root {
  --accent:  #1f3864;   /* navy, same as the CV */
  --ink:     #1a1a1a;   /* body text */
  --muted:   #6b6b6b;   /* dates, secondary text */
  --rule:    #e2e2e2;   /* hairlines */
  --page:    #ffffff;
  --measure: 44rem;     /* content width */
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #9fb8e0;
    --ink:    #e8e6e3;
    --muted:  #a0a0a0;
    --rule:   #333333;
    --page:   #14161a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 4rem 1.5rem 5rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}
a:hover { border-bottom-color: var(--accent); }

/* ---------------------------------------------------------- masthead */

.masthead {
  display: flex;
  align-items: flex-start;
  gap: 1.75rem;
  margin-bottom: 2.5rem;
}

.portrait {
  width: 130px;
  height: 130px;
  flex: none;
  object-fit: cover;
  border-radius: 3px;
  filter: grayscale(15%);
}

h1 {
  margin: 0 0 .35rem;
  font-size: 1.9rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.2;
  color: var(--accent);
  overflow-wrap: anywhere;   /* the surname is one long word; never let it overflow a phone */
}

.affiliation {
  margin: 0 0 .8rem;
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.5;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .07em;
}
.links a { border-bottom: none; }
.links a:hover { border-bottom: 1px solid var(--accent); }

.bio { margin: 0; }

/* ---------------------------------------------------------- sections */

section { margin-top: 2.75rem; }

h2 {
  margin: 0 0 1.1rem;
  padding-bottom: .35rem;
  border-bottom: 1px solid var(--rule);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: .78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--accent);
}

/* two-column rows: date on the left, content on the right */

.news, .entries {
  list-style: none;
  margin: 0;
  padding: 0;
}

.news li, .entries li {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 0 1rem;
  margin-bottom: .85rem;
}

.entries li p { margin: .2rem 0 0; color: var(--muted); font-size: .95rem; }

.date {
  color: var(--muted);
  font-size: .88rem;
  font-variant-numeric: tabular-nums;
  padding-top: .18rem;
}

/* ---------------------------------------------------------- papers */

.paper { margin-bottom: 1.9rem; }

.paper h3 {
  margin: 0 0 .2rem;
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.35;
}

.authors  { margin: 0; color: var(--muted); font-size: .95rem; }
.venue    { margin: .15rem 0 0; font-size: .92rem; color: var(--accent); }
.abstract { margin: .5rem 0 0; font-size: .95rem; }

.paper-links {
  margin: .4rem 0 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: .82rem;
}

/* ---------------------------------------------------------- footer */

footer {
  margin-top: 4rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: .85rem;
}
footer p { margin: 0; }

/* ---------------------------------------------------------- mobile */

@media (max-width: 600px) {
  main { padding: 2.5rem 1.25rem 3rem; }
  .masthead { flex-direction: column; gap: 1.25rem; }
  .portrait { width: 110px; height: 110px; }
  h1 { font-size: 1.6rem; }
  .news li, .entries li { grid-template-columns: 1fr; gap: 0; }
  .date { padding-top: 0; }
}