:root {
  --green: #2f9e44;
  --green-dark: #207332;
  --leaf: #e8f6ec;
  --ink: #172033;
  --muted: #64748b;
  --line: #dbe6dd;
  --warm: #fbfaf5;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(23, 32, 51, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  color: var(--ink);
  background: var(--warm);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

img {
  max-width: 100%;
}

.navbar {
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(219, 230, 221, 0.9);
  backdrop-filter: blur(18px);
  transition: box-shadow 0.25s ease, padding 0.25s ease;
}

.navbar.is-scrolled {
  box-shadow: 0 14px 40px rgba(23, 32, 51, 0.09);
}

.brand-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
}

.navbar-brand strong,
.navbar-brand small {
  display: block;
  line-height: 1.1;
}

.navbar-brand small {
  color: var(--muted);
  font-size: 0.75rem;
}

.nav-link {
  color: var(--ink);
  font-weight: 600;
}

.nav-link:hover,
.nav-link.active {
  color: var(--green);
}

.btn-success {
  --bs-btn-bg: var(--green);
  --bs-btn-border-color: var(--green);
  --bs-btn-hover-bg: var(--green-dark);
  --bs-btn-hover-border-color: var(--green-dark);
}

.btn-outline-success {
  --bs-btn-color: var(--green);
  --bs-btn-border-color: var(--green);
  --bs-btn-hover-bg: var(--green);
  --bs-btn-hover-border-color: var(--green);
}

.hero-section {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  background: #102019;
}

.hero-carousel,
.hero-carousel .carousel-inner,
.hero-carousel .carousel-item {
  position: absolute;
  inset: 0;
}
.title{
  color: var(--white);
  font-size: 3rem;
  font-weight: 850;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.hero-carousel img {
  width: 100%;
  height: 100vh;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(12, 22, 17, 0.82), rgba(12, 22, 17, 0.48), rgba(12, 22, 17, 0.18)),
    linear-gradient(0deg, rgba(12, 22, 17, 0.64), rgba(12, 22, 17, 0.06) 45%);
}

.hero-content {
  position: relative;
  z-index: 2;
}

.eyebrow,
.section-kicker {
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-section .eyebrow {
  color: #020300;
  font-size: 0.9rem;
}

.hero-section h1 {
  color: var(--white);
  font-size: clamp(2.7rem, 7vw, 5.7rem);
  font-weight: 850;
  letter-spacing: 0;
  line-height: 0.98;
  max-width: 900px;
}

.hero-section .lead {
  color: rgba(255, 255, 255, 0.9);
  max-width: 720px;
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  margin-top: 1.4rem;
}

.section-pad {
  padding: 96px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 44px;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.05;
  font-weight: 820;
  letter-spacing: 0;
}

.section-copy,
.section-heading p:not(.section-kicker) {
  color: var(--muted);
  font-size: 1.08rem;
}

.about-section {
  background: linear-gradient(180deg, var(--warm), #ffffff);
}

.stat-tile {
  height: 100%;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.stat-tile span {
  display: block;
  color: var(--green);
  font-size: 2rem;
  font-weight: 850;
  line-height: 1;
}

.stat-tile p {
  color: var(--muted);
  margin: 8px 0 0;
  font-weight: 650;
}

.feature-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: var(--shadow);
  padding: clamp(28px, 5vw, 48px);
}

.tree-mark {
  display: flex;
  justify-content: center;
  margin-bottom: 28px;
}

.tree-mark img {
  width: min(260px, 72vw);
  filter: drop-shadow(0 20px 28px rgba(32, 115, 50, 0.18));
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 22px;
}

.values-grid span {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--leaf);
  padding: 14px 16px;
  color: var(--green-dark);
  font-weight: 800;
  text-align: center;
}

.feature-panel p {
  color: var(--muted);
  margin: 0;
}

.work-section,
.events-section {
  background: #f3f8f1;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 32px;
}

.filter-btn {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font-weight: 750;
  padding: 10px 18px;
  transition: background 0.2s ease, color 0.2s ease, border 0.2s ease;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}

.research-card,
.leader-card,
.person-card,
.contact-form,
.research-card-detailed {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 18px 46px rgba(23, 32, 51, 0.08);
}

.work-section .row.g-4 {
  align-items: stretch;
}

.work-section .col-lg-6 {
  display: flex;
}

.research-card-detailed {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: clamp(24px, 3vw, 34px);
  transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease, background 0.35s ease;
}

.research-card-detailed > .row {
  flex: 1;
}

.research-card-detailed:hover {
  transform: translateY(-8px);
  box-shadow: 0 30px 70px rgba(23, 32, 51, 0.16);
  border-color: rgba(47, 158, 68, 0.3);
  background: rgba(248, 255, 246, 0.95);
}

.research-card-detailed:hover h3,
.research-card-detailed:hover li {
  color: var(--green-dark);
}

.research-card-detailed img {
  transition: transform 0.35s ease, filter 0.35s ease;
}

.research-card-detailed:hover img {
  transform: scale(1.03);
  filter: saturate(1.05);
}

.research-card-detailed li {
  transition: color 0.35s ease;
}

.people-badges {
  flex-wrap: wrap;
  overflow-x: visible;
  -webkit-overflow-scrolling: touch;
  gap: 0.5rem;
}
.badge {
  background-color: #1a1a2e;
  padding: 6px 12px;
  font-size: 0.75rem;
  color: white;
  transition: all 0.3s ease;
}
.badge:hover {
  background-color: #28a745; /* nicer green */
}
.badge:hover {
  
  color: white;
  cursor: pointer;
}
.people-badges .badge {
  transition: background-color 0.25s ease, color 0.25s ease;
  cursor: pointer;
  white-space: nowrap;
}

.people-badges .badge:hover {
  background-color: var(--green) !important;
  color: #fff !important;
}

.research-card {
  height: 100%;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.research-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.research-card img {
  width: 100%;
  height: 290px;
  object-fit: cover;
}

.research-card-body {
  padding: 26px;
}

.research-card h3 {
  margin: 14px 0 10px;
  font-size: 1.35rem;
  font-weight: 820;
}

.research-card p,
.leader-card p,
.person-card p {
  color: var(--muted);
}

.research-item.is-hidden {
  display: none;
}

.people-section,
.gallery-section,
.contact-section {
  background: #fff;
}

.people-hero,
.people-page {
  font-family: "Poppins", Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.people-hero {
  background: #e6f4ec;
  padding: 150px 0 76px;
  text-align: center;
}

.people-hero-copy {
  max-width: 760px;
  margin: 0 auto;
}

.people-hero h1 {
  color: #121b2f;
  font-size: clamp(2.7rem, 5vw, 4.1rem);
  font-weight: 900;
  line-height: 1.05;
  margin: 0 0 22px;
}

.people-hero h1 span {
  color: var(--green);
}

.people-hero p {
  color: #4c5d75;
  font-size: clamp(1.05rem, 2vw, 1.45rem);
  line-height: 1.55;
  margin: 0 auto;
  max-width: 760px;
}

.people-page {
  background:
    linear-gradient(180deg, #ffffff 0%, #fbfdfc 46%, #f8fcfa 100%);
  padding: 86px 0 34px;
}

.people-block {
  padding: 0 0 82px;
}

.project-staff-block {
  padding-bottom: 0;
}

.people-title {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 54px;
}

.people-title span {
  width: 40px;
  height: 4px;
  border-radius: 999px;
  background: var(--green);
  flex: 0 0 auto;
}

.people-title h2 {
  color: #1a2437;
  font-size: clamp(2rem, 3vw, 2.6rem);
  font-weight: 850;
  line-height: 1;
  margin: 0;
}

.lab-head-card {
  display: grid;
  grid-template-columns: minmax(320px, 0.78fr) minmax(0, 1.52fr);
  gap: clamp(30px, 4vw, 52px);
  align-items: center;
  background: #ffffff;
  border: 1px solid rgba(219, 230, 221, 0.72);
  border-radius: 32px;
  box-shadow: 0 22px 55px rgba(23, 32, 51, 0.08);
  padding: clamp(30px, 4vw, 52px);
}

.lab-head-card > img {
  width: 100%;
  aspect-ratio: 0.85;
  max-height: 590px;
  object-fit: cover;
  object-position: top center;
  border-radius: 16px;
  box-shadow: 0 18px 36px rgba(23, 32, 51, 0.12);
}

.lab-head-copy h3 {
  color: #111a2e;
  font-size: clamp(2rem, 4vw, 3.1rem);
  font-weight: 900;
  line-height: 1.08;
  margin: 0 0 8px;
}

.lab-head-role {
  color: var(--green);
  font-size: clamp(1.05rem, 1.6vw, 1.4rem);
  font-weight: 800;
  margin-bottom: 30px;
}

.lab-head-copy p:not(.lab-head-role) {
  color: #40506a;
  font-size: clamp(1rem, 1.4vw, 1.23rem);
  font-weight: 400;
  line-height: 1.48;
  margin: 0 0 22px;
}

.lab-head-copy p:last-child {
  margin-bottom: 0;
}

.people-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 30px;
}

.team-card {
  display: flex;
  min-height: 268px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: #ffffff;
  border: 1px solid rgba(219, 230, 221, 0.95);
  border-radius: 18px;
  box-shadow: 0 6px 14px rgba(23, 32, 51, 0.12);
  padding: 30px 22px;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.team-card:hover {
  transform: translateY(-5px);
  border-color: rgba(47, 158, 68, 0.35);
  box-shadow: 0 18px 34px rgba(23, 32, 51, 0.14);
}

.profile-avatar {
  width: 112px;
  height: 112px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
  margin-bottom: 24px;
  box-shadow: 0 0 0 8px #f7faf8;
}

.profile-avatar.initials {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--green);
  color: rgba(255, 255, 255, 0.9);
  font-size: 2.35rem;
  font-weight: 400;
  line-height: 1;
}

.team-card h3 {
  color: #202a3d;
  font-size: clamp(1.18rem, 1.7vw, 1.48rem);
  font-weight: 850;
  line-height: 1.16;
  margin: 0 0 8px;
}

.team-card p {
  color: var(--green);
  font-size: 1.06rem;
  font-weight: 600;
  margin: 0;
}

.leader-card {
  overflow: hidden;
}

.leader-card img {
  width: 100%;
  height: 440px;
  object-fit: cover;
  object-position: top;
}

.leader-card div {
  padding: 28px;
}

.leader-card .role {
  color: var(--green);
  font-weight: 800;
  margin-bottom: 8px;
}

.leader-card h3 {
  font-size: 2rem;
  font-weight: 850;
}

.person-card {
  min-height: 220px;
  padding: 24px 18px;
  text-align: center;
  transition: transform 0.25s ease, border 0.25s ease;
}

.person-card:hover {
  transform: translateY(-5px);
  border-color: rgba(47, 158, 68, 0.45);
}

.person-card img,
.avatar-card span {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  object-fit: cover;
  background: var(--leaf);
  color: var(--green-dark);
  font-size: 1.5rem;
  font-weight: 850;
  margin-bottom: 16px;
}

.person-card h3 {
  font-size: 1.08rem;
  font-weight: 820;
}

.event-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.event-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0;
}

.event-meta span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--green-dark);
  font-weight: 750;
  padding: 9px 14px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 210px;
  gap: 16px;
}

.gallery-item {
  border: 0;
  border-radius: 8px;
  padding: 0;
  overflow: hidden;
  background: #dfe8e0;
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease, filter 0.35s ease;
}

.gallery-item:hover img {
  transform: scale(1.06);
  filter: saturate(1.1);
}

.gallery-item.wide {
  grid-column: span 2;
}

.gallery-item.tall {
  grid-row: span 2;
}

.contact-section {
  background:
    linear-gradient(180deg, rgba(232, 246, 236, 0.8), rgba(255, 255, 255, 0.92)),
    url("../../public/images/Bhilai-Steel-Plant.webp");
  background-size: cover;
  background-position: center;
  background-blend-mode: screen;
}

.contact-list {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.contact-list p {
  margin: 0;
  display: flex;
  gap: 12px;
  align-items: center;
  color: var(--ink);
  font-weight: 700;
}

.contact-list i {
  color: var(--green);
  font-size: 1.25rem;
}

.contact-form {
  padding: clamp(24px, 4vw, 38px);
}

.form-control {
  border-color: var(--line);
  border-radius: 8px;
}

.form-control:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 0.25rem rgba(47, 158, 68, 0.16);
}

.form-status {
  color: var(--green-dark);
  font-weight: 750;
}

.site-footer {
  background: #172033;
  color: rgba(255, 255, 255, 0.86);
  padding: 26px 0;
}

.modal-content {
  border: 0;
  border-radius: 8px;
  overflow: hidden;
}

.modal-preview {
  max-height: 78vh;
  object-fit: contain;
  background: #101820;
}

@media (max-width: 991.98px) {
  .navbar-collapse {
    padding: 18px 0 10px;
  }

  .hero-section h1 {
    max-width: 720px;
  }

  .people-hero {
    padding-top: 132px;
  }

  .lab-head-card {
    grid-template-columns: 1fr;
  }

  .lab-head-card > img {
    max-height: 520px;
  }

  .people-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 575.98px) {
  .brand-logo {
    width: 42px;
    height: 42px;
  }

  .navbar-brand small {
    max-width: 190px;
    white-space: normal;
  }

  .section-pad {
    padding: 72px 0;
  }

  .people-hero {
    padding: 120px 0 56px;
  }

  .people-page {
    padding-top: 58px;
  }

  .people-block {
    padding-bottom: 58px;
  }

  .people-title {
    gap: 12px;
    margin-bottom: 30px;
  }

  .people-title span {
    width: 32px;
  }

  .lab-head-card {
    border-radius: 22px;
    padding: 22px;
  }

  .lab-head-card > img {
    max-height: none;
  }

  .people-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .team-card {
    min-height: 238px;
  }

  .hero-section .lead {
    font-size: 1rem;
  }

  .values-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .gallery-item,
  .gallery-item.wide,
  .gallery-item.tall {
    grid-column: auto;
    grid-row: auto;
    height: 250px;
  }
}