/* ----------------------------------------------------------
   Personal site — academic minimalist, inspired by
   people.cs.umass.edu/~shenoy
   ---------------------------------------------------------- */

:root {
  --bg:            #ffffff;
  --text:          #1a1a1a;
  --text-strong:   #111;
  --text-muted:    #333;
  --text-faint:    #555;
  --text-vfaint:   #777;
  --border:        #ddd;
  --border-light:  #e7e7e7;
  --border-img:    #ccc;
  --link:          #0645ad;
  --link-visited:  #0b0080;
  --nav-bg:        #2d3138;
  --nav-text:      #d8d8d8;
  --nav-text-on:   #ffffff;
  --nav-brand-hov: #e8c0d0;
  --nav-accent:    #882345;
  --nav-hover-bg:  rgba(255,255,255,0.06);
}

[data-theme="dark"] {
  --bg:            #16181d;
  --text:          #e6e6e6;
  --text-strong:   #f4f4f4;
  --text-muted:    #c2c2c2;
  --text-faint:    #9a9a9a;
  --text-vfaint:   #7a7a7a;
  --border:        #2c2f36;
  --border-light:  #23252b;
  --border-img:    #3a3d44;
  --link:          #6ea8fe;
  --link-visited:  #b39ddb;
  --nav-bg:        #0e1014;
  --nav-text:      #c4c4c4;
  --nav-text-on:   #ffffff;
  --nav-brand-hov: #e8c0d0;
  --nav-accent:    #b03050;
  --nav-hover-bg:  rgba(255,255,255,0.06);
}

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

body {
  font-family: "Lora", Georgia, "Times New Roman", Times, serif;
  font-size: 16px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  margin: 0;
  padding: 0;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Skip link: visually hidden until keyboard-focused, then floats top-left. */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 0.5rem 0.85rem;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 3px;
  z-index: 1000;
  text-decoration: none;
}
.skip-link:focus {
  left: 0.75rem;
  top: 0.75rem;
}

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}

/* --------------- Top navigation --------------- */
nav.topnav {
  background: var(--nav-bg);
  color: var(--nav-text-on);
  border-bottom: 4px solid var(--nav-accent);
}

.nav-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.0rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 1.2rem;
}

.nav-inner .brand {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: 500;
  font-size: 1.05rem;
  color: var(--nav-text-on);
  text-decoration: none;
  padding: 0.85rem 0;
  margin-right: 0.4rem;
  flex-shrink: 0;
}
.nav-inner .brand:hover { color: var(--nav-brand-hov); }

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid #888;
  color: var(--nav-text-on);
  font-size: 1.1rem;
  padding: 0.25rem 0.55rem;
  cursor: pointer;
  border-radius: 3px;
}

.nav-links, .nav-social {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.nav-social { margin-left: auto; }

.nav-links li a, .nav-social li a, .nav-social li button {
  display: flex;
  align-items: center;
  padding: 0.85rem 0.7rem;
  color: var(--nav-text);
  text-decoration: none;
  font-size: 0.92rem;
  letter-spacing: 0.3px;
  background: transparent;
  border: 0;
  font-family: inherit;
  cursor: pointer;
}
.nav-links li a:hover,
.nav-social li a:hover,
.nav-social li button:hover {
  color: var(--nav-text-on);
  background: var(--nav-hover-bg);
}
.nav-links li a.active {
  color: var(--nav-text-on);
  border-bottom: 2px solid var(--nav-text-on);
  margin-bottom: -2px;
}

/* Icon links in the right-hand nav. */
.nav-social li a, .nav-social li button {
  padding: 0.85rem 0.55rem;
}

/* Inline SVG icons (LinkedIn, Scholar, GitHub, theme toggle moon/sun). */
.nav-icon {
  width: 1.15rem;
  height: 1.15rem;
  vertical-align: middle;
}

/* Theme toggle: show only the icon that matches the current theme. */
#theme-toggle svg { display: none; }
#theme-toggle .theme-icon-light { display: inline-block; }
[data-theme="dark"] #theme-toggle .theme-icon-light { display: none; }
[data-theme="dark"] #theme-toggle .theme-icon-dark  { display: inline-block; }

/* CV icon: inline SVG — page with folded corner, "CV" text, and two lines.
   Alignment is now handled by the inline-flex+align-items:center on the
   parent .nav-social li a; no vertical-align needed. */
.cv-icon {
  width: 1.2rem;
  height: 1.2rem;
}

/* --------------- Wrap / content --------------- */
.wrap {
  max-width: 1060px;
  margin: 0 auto;
  padding: 2.0rem 1.25rem 3.0rem;
}

.page-title {
  font-size: 2.25rem;
  margin: 0.4rem 0 1.2rem;
}

/* --------------- Masthead --------------- */
.masthead {
  display: flex;
  gap: 1.8rem;
  align-items: flex-start;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.4rem;
  margin-bottom: 1.6rem;
}

.masthead .photo { flex: 0 0 170px; }
.masthead .photo img {
  width: 170px;
  height: auto;
  display: block;
}

.masthead .title { flex: 1; }
.masthead h1 {
  font-size: 2.25rem;
  line-height: 1.15;
  margin: 0 0 0.6rem;
}
.tiny-link {
  font-size: 0.4em;
  font-weight: normal;
  letter-spacing: 0;
  vertical-align: baseline;
  margin-left: 0.3em;
  color: var(--text-faint);
}
/* Bio link inherits the standard link color via the generic "a" rule. */

.masthead .affil {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Affiliation and contact lines stacked in a single column under the role. */
.masthead .contact-row {
  margin-top: 0.9rem;
}

/* --------------- Sections --------------- */
section { margin: 1.6rem 0; }

/* Headings use sans-serif (Helvetica Neue), like Prashant Shenoy's
   Bootstrap-defaulted site. Body text stays serif (Lora).
   Weight 500 (medium) for a lighter look. */
h1, h2, h3, h4, h5, h6, .page-title {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: 500;
}

h2 {
  font-size: 1.5rem;
  margin: 0 0 0.7rem;
  color: var(--text-strong);
}

h3 {
  font-size: 1.15rem;
  margin: 1.1rem 0 0.4rem;
  color: var(--text-strong);
}

p { margin: 0 0 0.75rem; }

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

/* --------------- News --------------- */
ul.news {
  list-style: none;
  padding-left: 0;
  margin: 0;
}
ul.news li {
  position: relative;
  padding: 0.35rem 0 0.35rem 5.2rem; /* left padding for date column */
  border-bottom: 1px solid var(--border-light);
}
ul.news li:last-child { border-bottom: none; }
ul.news .date {
  position: absolute;
  left: 0;
  top: 0.5rem; /* roughly aligns date baseline with content baseline */
  width: 4.5rem;
  text-align: justify;
  text-align-last: justify;
  white-space: nowrap;
  color: var(--text-faint);
  font-size: 0.88rem;
  letter-spacing: 0.4px;
}
.news-toggle {
  margin-top: 0.5rem;
  font-size: 0.93rem;
}

/* --------------- Publications --------------- */
ul.pubs {
  list-style: none;
  padding-left: 0;
  margin: 0.5rem 0;
}
ul.pubs li { margin-bottom: 1.3rem; }
.pauthors { display: block; }
.pauthors b { font-weight: 550; } /* Nathan's name — between medium and semibold */
.pvenue   { display: block; font-style: italic; color: var(--text-muted); }
.plinks   { display: block; font-size: 0.92rem; margin-top: 0.1rem; }
.plinks a { font-style: normal; }
/* Award / honor note on a paper (e.g. Best Paper Candidate). Accent
   color + medium weight so it stands out without reading as a link. */
.paward   { display: block; font-size: 0.92rem; font-weight: 600; color: var(--nav-accent); }

/* --------------- Footer --------------- */
footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--text-vfaint);
  font-size: 0.85rem;
  text-align: center;
}

/* --------------- Responsive --------------- */
@media (max-width: 720px) {
  .nav-inner { flex-wrap: wrap; }
  .nav-toggle { display: inline-block; margin-left: auto; }
  .nav-links, .nav-social {
    flex-basis: 100%;
    flex-direction: column;
    align-items: flex-start;
    display: none;
  }
  .nav-links.open, .nav-social.open { display: flex; }
  .nav-links li a, .nav-social li a {
    padding: 0.6rem 0.2rem;
    width: 100%;
  }
  .nav-social { margin-left: 0; border-top: 1px solid #444; }

  .masthead {
    flex-direction: column-reverse;
    gap: 1rem;
    align-items: flex-start;
  }
  .masthead .photo img { width: 140px; }
}