/* ==========================================================================
   Sree Dhyuti Nimmagadda — academic profile
   Single-column researcher-style layout. Light (default) and dark themes;
   a thin sari-border stripe and marigold links kept as a quiet signature.
   ========================================================================== */

:root {
  --bg: #fdfbf6;
  --surface: #f6f1e6;
  --border: rgba(120, 100, 60, 0.22);
  --border-soft: rgba(120, 100, 60, 0.13);
  --text: #2b2333;
  --muted: #675d74;
  --faint: #93889d;
  --accent: #b06e00;         /* deep marigold */
  --accent-hover: #8a5600;
  --teal: #0d7f74;
  --rani: #bb3663;
  --sari-border: linear-gradient(90deg, #b58a2a, #e08900 25%, #d64277 55%, #8b58e8 80%, #0d9184);
  --header-bg: rgba(253, 251, 246, 0.92);
  --font-serif: "Source Serif 4", Georgia, serif;
  --font-sans: "Inter", system-ui, sans-serif;
  --nav-h: 54px;
}

html[data-theme="dark"] {
  --bg: #14111f;
  --surface: #1d1830;
  --border: rgba(210, 185, 130, 0.24);
  --border-soft: rgba(210, 185, 130, 0.13);
  --text: #ece7dc;
  --muted: #aca2be;
  --faint: #81768f;
  --accent: #ffb141;
  --accent-hover: #ffc873;
  --teal: #43cabb;
  --rani: #ef7ba1;
  --header-bg: rgba(20, 17, 31, 0.92);
}

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15.5px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s, color 0.3s;
}
/* thin sari-border stripe across the very top */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--sari-border);
  z-index: 200;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

.wrap { max-width: 820px; margin: 0 auto; padding: 0 22px; }

h1, h2, h3 { font-family: var(--font-serif); font-weight: 600; line-height: 1.3; }

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
  padding-top: 3px; /* clear the sari stripe */
}
.nav-wrap {
  min-height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 6px;
  padding-bottom: 6px;
}
.brand {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 17px;
  color: var(--text);
}
.brand:hover { color: var(--text); text-decoration: none; }
.site-header nav { display: flex; align-items: center; gap: 4px 14px; flex-wrap: wrap; }
.site-header nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
}
.site-header nav a:hover { color: var(--accent); text-decoration: none; }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  margin-left: 4px;
  border-radius: 8px;
  border: 1px solid var(--border-soft);
  background: none;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */
.about {
  max-width: 700px;
  padding: 56px 0 8px;
}
.about h1 { font-size: 32px; font-weight: 700; margin-bottom: 4px; }
.about .role { color: var(--muted); font-size: 16px; margin-bottom: 18px; }
.about p + p { margin-top: 14px; }
.about-text p { color: var(--text); }
.about-text strong { font-weight: 600; }

.links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin-top: 20px;
}
.links a { font-size: 14.5px; font-weight: 500; }
.links i { margin-right: 4px; }

@media (max-width: 640px) {
  .about { padding-top: 36px; }
}

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */
section { padding: 30px 0 6px; }
main > section { border-top: none; }

h2 {
  font-size: 23px;
  margin-bottom: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border-soft);
}
section:first-of-type h2 { border-top: none; padding-top: 0; }

.section-note { color: var(--text); max-width: 700px; }

/* --------------------------------------------------------------------------
   News + CV-style lists
   -------------------------------------------------------------------------- */
.news-list, .cv-list { list-style: none; }
.news-list li, .cv-list li {
  display: grid;
  grid-template-columns: 118px 1fr;
  gap: 14px;
  padding: 5px 0;
}
.cv-list li { padding: 9px 0; }
.news-list .date, .cv-list .date {
  color: var(--faint);
  font-size: 13.5px;
  font-weight: 500;
  padding-top: 2px;
  white-space: nowrap;
}
.cv-list li div { color: var(--muted); }
.cv-list li strong { color: var(--text); font-weight: 600; }
.cv-list.plain li { padding: 4px 0; }
.cv-list.plain li div { color: var(--text); }

@media (max-width: 560px) {
  .news-list li, .cv-list li { grid-template-columns: 1fr; gap: 0; }
}

/* --------------------------------------------------------------------------
   Publications
   -------------------------------------------------------------------------- */
.pub-list { list-style: none; }
.pub-list li { padding: 6px 0; }
.pub-title { font-weight: 600; }
.pub-authors { font-size: 14.5px; color: var(--muted); }
.pub-authors strong { color: var(--text); }
.pub-venue { font-size: 14.5px; font-style: italic; color: var(--muted); }

/* --------------------------------------------------------------------------
   Projects — compact media rows
   -------------------------------------------------------------------------- */
.proj-group + .proj-group { margin-top: 26px; }
.proj-cat {
  font-family: var(--font-sans);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 2px;
}
.proj { padding: 13px 0; }
.proj + .proj { border-top: 1px solid var(--border-soft); }
.proj-body h4 { font-family: var(--font-serif); font-size: 17px; font-weight: 600; margin-bottom: 4px; }
.proj-body p { color: var(--muted); font-size: 14.5px; }
.proj-body em { color: var(--rani); font-style: normal; font-weight: 500; }
.code-link { font-family: var(--font-sans); font-size: 13.5px; font-weight: 500; }

/* --------------------------------------------------------------------------
   Music
   -------------------------------------------------------------------------- */
.music-grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.music-grid iframe {
  width: 100%;
  height: 130px;
  border: 1px solid var(--border-soft);
  border-radius: 8px;
}
@media (max-width: 560px) { .music-grid { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  margin-top: 48px;
  padding: 22px 0 30px;
  border-top: 1px solid var(--border-soft);
  color: var(--faint);
  font-size: 13.5px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}