/* Kabir Group @ IISER Pune — stylesheet */

:root {
  --navy:      #14213D;   /* header / footer / dark text */
  --navy-2:    #1D2E52;
  --paper:     #FFFFFF;
  --paper-2:   #F5F6F8;   /* light panel background */
  --ink:       #1B1F27;
  --ink-soft:  #5B6270;
  --line:      #E3E5EA;
  --accent:    #B5872E;   /* muted gold link/accent, academic not neon */
  --accent-2:  #2F5D8A;   /* muted blue secondary accent */

  --display: Georgia, "Iowan Old Style", "Times New Roman", serif;
  --body:    -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono:    "Courier New", monospace;

  --container: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 700;
  line-height: 1.18;
  margin: 0 0 .5em;
}
p { margin: 0 0 1em; }
.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--display);
  font-size: 19px;
  font-weight: 700;
  color: var(--navy);
}
.brand small {
  display: block;
  font-family: var(--body);
  font-weight: 400;
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 2px;
}
.brand-mark { width: 30px; height: 30px; flex: none; }
nav.primary-nav ul { display: flex; gap: 30px; }
nav.primary-nav a {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink-soft);
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
nav.primary-nav a:hover,
nav.primary-nav a[aria-current="page"] {
  color: var(--navy);
  border-bottom-color: var(--accent);
}
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--navy);
  width: 42px;
  height: 38px;
  cursor: pointer;
}
@media (max-width: 860px) {
  nav.primary-nav {
    position: fixed;
    inset: 78px 0 0 0;
    background: #fff;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease;
  }
  nav.primary-nav.open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  nav.primary-nav ul { flex-direction: column; gap: 0; padding: 10px 32px; }
  nav.primary-nav a { display: block; padding: 16px 0; border-bottom: 1px solid var(--line); font-size: 17px; }
  .nav-toggle { display: block; }
}

/* ---------- hero ---------- */
.hero {
  background: var(--navy);
  color: #fff;
  padding: 90px 0;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 56px;
  align-items: center;
}
.hero-text { max-width: 560px; }
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-text { max-width: none; }
}
.eyebrow {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: #C9A66B;
  display: block;
  margin-bottom: 16px;
}
.hero h1 { font-size: clamp(32px, 4.6vw, 38px); color: #fff; }
.hero h1 em { font-style: italic; color: #C9A66B; }
.hero p.lede { font-size: 18px; color: #C6CCDA; max-width: 560px; }
.btn-row { display: flex; gap: 14px; margin-top: 26px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  padding: 13px 24px;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-solid { background: var(--accent); color: #1B1300; }
.btn-solid:hover { background: #c99a3d; }
.btn-outline { border-color: rgba(255,255,255,.4); color: #fff; }
.btn-outline:hover { border-color: #fff; }
.btn-outline.on-light { border-color: var(--line); color: var(--navy); }
.btn-outline.on-light:hover { border-color: var(--navy); background-color: var(--navy); color: #ffffff; }

/* ---------- image slider ---------- */
.slider {
  position: relative;
  background: var(--navy-2);
  border-radius: 8px;
  overflow: hidden;
}
.slider-track {
  display: flex;
  transition: transform .5s ease;
  width: 100%; /* Ensures track spans correctly */
}
.slide {
  min-width: 100%;
  flex-shrink: 0; /* FIXED: Prevents slides from squishing to 0 width */
  aspect-ratio: 4/3;
  position: relative;
  background: linear-gradient(135deg, #22345C 0%, #17223D 100%);
  display: flex;
  align-items: flex-end;
  isolation: isolate; /* gives this slide its own clean stacking context */
}
.slide img {
  z-index: 1; /* force image above the slide's own background */
}
.slide .cap {
  font-family: var(--mono);
  font-size: 12.5px;
  color: #C6CCDA;
  padding: 16px 32px;
  background: rgba(0,0,0,.25);
  width: 100%;
  position: relative;
  z-index: 2; /* force caption above the image */
}
.slider-controls {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  pointer-events: none;
}
.slider-controls button {
  pointer-events: auto;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.5);
  background: rgba(0,0,0,.25);
  color: #fff;
  cursor: pointer;
  font-size: 16px;
}
.slider-dots {
  position: absolute;
  bottom: 12px; right: 24px;
  display: flex;
  gap: 6px;
}
.slider-dots span {
  width: 7px; height: 7px; border-radius: 50%;
  background: rgba(255,255,255,.4);
}
.slider-dots span.active { background: #fff; }

/* ---------- stat row ---------- */
.stat-row {
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
}
.stat-row .wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  text-align: center;
}
.stat { padding: 34px 20px; border-left: 1px solid var(--line); }
.stat:first-child { border-left: none; }
.stat b { display: block; font-family: var(--display); font-size: 30px; color: var(--navy); }
.stat span { font-size: 13px; color: var(--ink-soft); }
@media (max-width: 700px) {
  .stat-row .wrap { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: none; }
}

/* ---------- sections ---------- */
section.block { padding: 80px 0; }
section.block.tight { padding: 54px 0; }
section.block.on-panel { background: var(--paper-2); }
section.block.on-navy { background: var(--navy); color: #fff; }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; margin-bottom: 40px; }
.section-head .eyebrow { margin-bottom: 8px; color: var(--accent); }
.section-head h2 { font-size: clamp(24px, 3.2vw, 32px); color: var(--navy); }
.on-navy .section-head h2 { color: #fff; }
.section-head .more { font-size: 13.5px; font-weight: 600; color: var(--accent-2); white-space: nowrap; }
.on-navy .section-head .more { color: #C9A66B; }

/* page hero (interior pages) */
.page-hero { background: var(--navy); color: #fff; padding: 60px 0 46px; }
.page-hero h1 { color: #fff; font-size: clamp(28px, 4vw, 42px); }
.page-hero p { color: #C6CCDA; max-width: 620px; font-size: 16.5px; }

/* ---------- recent work cards ---------- */
.work-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.work-card { display: flex; flex-direction: column; }
.work-figure {
  aspect-ratio: 16/11;
  background: linear-gradient(135deg, #22345C 0%, #17223D 100%);
  border-radius: 4px;
  margin-bottom: 18px;
}
.work-card .venue { font-family: var(--mono); font-size: 12px; color: var(--accent-2); text-transform: uppercase; letter-spacing: .04em; margin-bottom: 8px; }
.work-card h3 { font-size: 19px; margin-bottom: 10px; }
.work-card p { color: var(--ink-soft); font-size: 14.5px; }
.work-card .link { font-size: 13.5px; font-weight: 600; color: var(--accent-2); }
@media (max-width: 900px) { .work-grid { grid-template-columns: 1fr; } }

/* ---------- theme cards (research) ---------- */
.theme-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.theme-card { border: 1px solid var(--line); border-radius: 6px; padding: 30px 28px; background: #fff; }
.theme-card .idx { font-family: var(--mono); font-size: 12px; color: var(--accent); margin-bottom: 12px; display: block; }
.theme-card h3 { font-size: 20px; margin-bottom: 10px; color: var(--navy); }
.theme-card p { color: var(--ink-soft); font-size: 15px; margin-bottom: 0; }
@media (max-width: 760px) { .theme-grid { grid-template-columns: 1fr; } }

/* ---------- news list ---------- */
.news-list { display: flex; flex-direction: column; }
.news-item { display: grid; grid-template-columns: 120px 1fr; gap: 26px; padding: 26px 0; border-top: 1px solid var(--line); }
.on-navy .news-item { border-top: 1px solid rgba(255,255,255,.15); }
.news-date { font-family: var(--mono); font-size: 13px; color: var(--accent); padding-top: 3px; }
.news-item h3 { font-size: 18px; margin-bottom: 6px; color: var(--navy); }
.on-navy .news-item h3 { color: #fff; }
.news-item p { color: var(--ink-soft); font-size: 15px; margin-bottom: 0; }
.on-navy .news-item p { color: #C6CCDA; }
@media (max-width: 640px) { .news-item { grid-template-columns: 1fr; gap: 6px; } }

/* ---------- people ---------- */
.people-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.avatar { aspect-ratio: 1; border-radius: 6px; background: var(--paper-2); border: 1px solid var(--line); margin-bottom: 16px; }
.person h3 { font-size: 17px; margin-bottom: 2px; color: var(--navy); }
.person .role { font-size: 12.5px; font-weight: 600; color: var(--accent-2); text-transform: uppercase; letter-spacing: .03em; margin-bottom: 8px; display: block; }
.person p { font-size: 14px; color: var(--ink-soft); margin: 0; }
@media (max-width: 900px) { .people-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .people-grid { grid-template-columns: 1fr; } }

.alumni-list { border-top: 1px solid var(--line); }
.alumni-item { display: grid; grid-template-columns: 210px 1fr; gap: 26px; padding: 20px 0; border-bottom: 1px solid var(--line); align-items: start; }
.alumni-years { font-family: var(--mono); font-size: 12.5px; color: var(--accent); padding-top: 3px; }
.alumni-item h3 { font-size: 16.5px; margin-bottom: 3px; color: var(--navy); }
.alumni-item p { font-size: 14px; color: var(--ink-soft); margin: 0; }
@media (max-width: 640px) {
  .alumni-item { grid-template-columns: 1fr; gap: 4px; }
}

.pi-panel { display: grid; grid-template-columns: 320px 1fr; gap: 40px; align-items: start; padding: 36px; background: var(--paper-2); border-radius: 6px; margin-bottom: 56px; border: 1px solid var(--line); }
.pi-panel .avatar { margin-bottom: 0; aspect-ratio: 4/3; }
@media (max-width: 500px) { .pi-panel { grid-template-columns: 1fr; } }

/* ---------- publications ---------- */
.pub-filters { display: flex; gap: 10px; margin-bottom: 30px; flex-wrap: wrap; }
.pub-filters span { font-size: 12.5px; font-weight: 600; padding: 8px 16px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink-soft); }
.pub-list { border-top: 1px solid var(--line); }
.pub-item { display: grid; grid-template-columns: 80px 1fr; gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.pub-year { font-family: var(--mono); font-size: 24px; color: var(--ink-soft); padding-top: 2px; }
.pub-item h3 { font-size: 16px; margin-bottom: 6px; font-family: var(--body); font-weight: 500; color: var(--navy); }
.pub-item h3 a { color: var(--accent-2); text-decoration: none; }
.pub-item h3 a:hover { color: var(--accent); text-decoration: none; }
.pub-item .authors { font-size: 14px; color: var(--ink-soft); margin-bottom: 4px; }
.pub-item .venue { font-size: 14px; font-weight: 500; color: var(--accent-2); }
@media (max-width: 640px) { .pub-item { grid-template-columns: 1fr; gap: 6px; } }






/* ---------- prose ---------- */
.prose { max-width: 720px; }
.prose p { color: var(--ink-soft); font-size: 16.5px; }
.prose h2 { margin-top: 1.6em; color: var(--navy); }
.callout { border-left: 3px solid var(--accent); padding: 4px 0 4px 22px; font-family: var(--display); font-size: 20px; font-style: italic; color: var(--ink); margin: 34px 0; }

/* ---------- logo strip ---------- */
.logo-strip { display: flex; gap: 40px; flex-wrap: wrap; align-items: center; padding: 40px 0; }
.logo-chip { font-size: 12.5px; font-weight: 600; letter-spacing: .03em; color: var(--ink-soft); border: 1px dashed var(--line); padding: 12px 18px; border-radius: 6px; text-transform: uppercase; }
.on-navy .logo-chip { color: #C6CCDA; border-color: rgba(255,255,255,.25); }

/* ---------- join panel ---------- */
.join-panel { background: var(--paper-2); border: 1px solid var(--line); border-radius: 6px; padding: 52px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; }
.join-panel h2 { color: var(--navy); }
.join-panel p { color: var(--ink-soft); }
@media (max-width: 760px) { .join-panel { grid-template-columns: 1fr; padding: 34px 26px; } }

/* ---------- footer ---------- */
footer.site-footer { background: var(--navy); color: #C6CCDA; padding: 56px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.12); }
.footer-grid h4 { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: #fff; margin-bottom: 16px; font-family: var(--body); font-weight: 700; }
.footer-grid li { margin-bottom: 10px; font-size: 14px; }
.footer-grid a:hover { color: #fff; }
.footer-brand { font-family: var(--display); font-size: 20px; color: #fff; margin-bottom: 10px; }
.footer-bottom { padding-top: 22px; font-size: 13px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* editor note ribbon */
.edit-note { font-family: var(--mono); font-size: 12px; background: #FFF7E0; border: 1px dashed #D9A400; color: #6b5300; padding: 10px 16px; border-radius: 6px; margin-bottom: 22px; display: inline-block; }

/* hyperlink */
/* a {
  color: #B5872E;
  text-decoration: none;
  transition: color 0.3s ease; /* Creates a smooth transition effect */
}

a:hover, a:focus {
  color: #c70039;
} */

sub {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
  bottom: -0.25em;
}

/* ---------- research topic rows (alternating layout) ---------- */
.topic-row {
  display: grid;
  grid-template-columns: 2fr 3fr;   /* figure 40% | text 60% */
  gap: 48px;
  align-items: center;
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}
.topic-row.reverse {
  grid-template-columns: 3fr 2fr;   /* text 60% | figure 40% */
}
.topic-row:first-child { padding-top: 0; }
.topic-row:last-child { border-bottom: none; }
.topic-row.reverse .topic-figure { order: 2; }
.topic-row.reverse .topic-text { order: 1; }
.topic-figure {
  aspect-ratio: 3/2;
  background: #FFFFFF;   /* was: linear-gradient(135deg, #22345C 0%, #17223D 100%); */
  border-radius: 8px;
  overflow: hidden;
}
.topic-figure img { width: 100%; height: 100%; object-fit: contain; display: block; }
.topic-text .idx {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 12px;
  display: block;
}
.topic-text h3 { font-size: 24px; margin-bottom: 14px; color: var(--navy); }
.topic-text p { color: var(--ink-soft); font-size: 16px; margin-bottom: 0; }
@media (max-width: 760px) {
  .topic-row {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 32px 0;
  }
  .topic-row.reverse .topic-figure,
  .topic-row.reverse .topic-text { order: initial; }
}

/* Email */
.contact-email {
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 15px;
  font-weight: 500;
  color: #B5872E; /* Simple gold text color */
  text-decoration: none;
  transition: color 0.2s ease;
}

.contact-email:hover {
  color: #FFFFFF; /* Pure white on hover */
}