/* ==============================
   Zhuoni's Math Homepage Styles
   ============================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary:    #1a4a7a;
  --color-link:       #2d6cb5;
  --color-bg:         #ffffff;
  --color-text:       #222222;
  --color-muted:      #5c6670;
  --color-border:     #d8dee4;
  --font-main:        'Georgia', 'Times New Roman', serif;
  --max-width:        760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-primary:  #9cc3ee;
    --color-link:     #7fb3ea;
    --color-bg:       #16191d;
    --color-text:     #e3e6ea;
    --color-muted:    #9aa4ae;
    --color-border:   #343a41;
  }
}

/* ── Base ── */
body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: var(--color-link);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 1.5rem;
}

/* ── Header ── */
.profile {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  padding-bottom: 1.4rem;
  border-bottom: 1px solid var(--color-border);
}

.profile-photo {
  width: 150px;
  height: 150px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 4px solid var(--color-border);
  object-fit: cover;
  object-position: 40% 30%;
}

.profile-text h1 {
  font-size: 1.9rem;
  font-weight: normal;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 0.35rem;
}

.profile-text .name-zh {
  font-size: 0.8em;
  color: var(--color-muted);
  margin-left: 0.2em;
}

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

.profile-links {
  margin-top: 0.35rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1.2rem;
}

.profile-links span {
  color: var(--color-text);
}

/* ── Sections ── */
section {
  padding-top: 1.4rem;
}

section h2 {
  font-size: 1.15rem;
  font-weight: normal;
  color: var(--color-primary);
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}

section p + p {
  margin-top: 0.5rem;
}

/* ── Publications ── */
.pub-list {
  padding-left: 1.4rem;
}

.pub-list li + li {
  margin-top: 0.6rem;
}

.pub-list li::marker {
  color: var(--color-muted);
}

.pub-title {
  display: block;
  font-weight: bold;
}

.pub-meta {
  display: block;
  font-size: 0.92rem;
  color: var(--color-muted);
}

/* ── Footer ── */
footer {
  margin-top: 2rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.82rem;
  color: var(--color-muted);
}

/* ── Responsive ── */
@media (max-width: 560px) {
  .page {
    padding: 1.5rem 1rem 1rem;
  }
  .profile {
    gap: 1rem;
  }
  .profile-photo {
    width: 100px;
    height: 100px;
    border-width: 3px;
  }
  .profile-text h1 {
    font-size: 1.5rem;
  }
}