/* ============================================================
   CSS Variables
   ============================================================ */
:root {
  --color-bg:       #f8fafc;
  --color-surface:  #ffffff;
  --color-border:   #e2e8f0;
  --color-text:     #1e293b;
  --color-muted:    #64748b;
  --color-accent:   #2563eb;
  --color-accent-2: #7c3aed;
  --radius:         0.75rem;
  --shadow:         0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .04);
  --shadow-md:      0 4px 6px rgba(0, 0, 0, .07), 0 2px 4px rgba(0, 0, 0, .05);
  --font:           'Inter', system-ui, sans-serif;
  --max-width:      860px;
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-accent);
}

/* ============================================================
   Layout
   ============================================================ */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.25rem 5rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

/* ============================================================
   Section title (shared)
   ============================================================ */
.section__title {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: .02em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 1.25rem;
  padding-bottom: .5rem;
  border-bottom: 2px solid var(--color-border);
}

/* ============================================================
   Profile
   ============================================================ */
.profile {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2rem;
  align-items: start;
}

.profile__photo {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-border);
  display: block;
}

.profile__bio {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: .5rem;
}

.profile__name {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
}

.profile__title {
  color: var(--color-accent);
  font-weight: 500;
  font-size: .9375rem;
}

.profile__text {
  color: var(--color-muted);
  font-size: .9375rem;
  line-height: 1.7;
}

@media (max-width: 560px) {
  .profile {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }

  .profile__photo {
    width: 140px;
    height: 140px;
  }
}

/* ============================================================
   Contact Links
   ============================================================ */
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: .625rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .45rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text);
  text-decoration: none;
  font-size: .875rem;
  font-weight: 500;
  background: var(--color-surface);
  box-shadow: var(--shadow);
  transition: border-color .15s, color .15s, box-shadow .15s;
}

.contact-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.contact-link i {
  font-size: 1rem;
}

/* ============================================================
   Card Grid (Internships)
   ============================================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow .2s, transform .2s;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card__accent {
  height: 4px;
  background: var(--color-accent);
}

.card--intern:nth-child(2) .card__accent {
  background: var(--color-accent-2);
}

.card__body {
  padding: 1.25rem 1.5rem 1.5rem;
}

.card__role {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: .2rem;
}

.card__org {
  color: var(--color-accent);
  font-weight: 500;
  font-size: .9375rem;
  margin-bottom: .2rem;
}

.card__date {
  color: var(--color-muted);
  font-size: .8125rem;
  margin-bottom: .875rem;
}

.card__bullets {
  padding-left: 1.1rem;
  color: var(--color-muted);
  font-size: .875rem;
  display: flex;
  flex-direction: column;
  gap: .3rem;
}

/* ============================================================
   Publications
   ============================================================ */
.pub-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.pub {
  display: flex;
  gap: 1.25rem;
  align-items: baseline;
}

.pub__year {
  flex-shrink: 0;
  width: 3rem;
  font-weight: 700;
  font-size: .875rem;
  color: var(--color-accent);
}

.pub__body {
  display: flex;
  flex-direction: column;
  gap: .2rem;
}

.pub__title a {
  color: var(--color-text);
  font-weight: 600;
  text-decoration: none;
  font-size: .9375rem;
  line-height: 1.4;
}

.pub__title a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.pub__authors {
  color: var(--color-muted);
  font-size: .875rem;
}

.pub__venue {
  font-size: .875rem;
  color: var(--color-muted);
}

.pub__link {
  margin-left: .5rem;
  color: var(--color-accent);
  font-weight: 500;
  text-decoration: none;
  font-size: .8125rem;
}

.pub__link:hover {
  text-decoration: underline;
}

.pub__badge {
  display: inline-block;
  padding: .15rem .55rem;
  background: #fef9c3;
  color: #854d0e;
  border: 1px solid #fde047;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 600;
  margin-left: .5rem;
  vertical-align: middle;
}

/* ============================================================
   Skills
   ============================================================ */
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.tag {
  display: inline-block;
  padding: .3rem .85rem;
  background: #eff6ff;
  color: var(--color-accent);
  border: 1px solid #bfdbfe;
  border-radius: 999px;
  font-size: .8125rem;
  font-weight: 500;
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--color-muted);
  font-size: .8125rem;
  border-top: 1px solid var(--color-border);
}