/* =========================================================
   CSS CUSTOM PROPERTIES & DESIGN TOKENS
========================================================= */
:root {
  /* Color Palette */
  --primary:        #0f7d5b;        /* Deep teal-green */
  --primary-dark:   #0a5c43;
  --primary-light:  #1aad80;
  --secondary:      #1a4a7a;        /* Deep navy */
  --accent:         #f59e0b;        /* Warm amber accent */
  --accent-light:   #fde68a;
  --danger:         #e53e3e;

  /* Neutrals */
  --dark:     #0f1923;
  --gray-900: #1e293b;
  --gray-700: #334155;
  --gray-500: #64748b;
  --gray-300: #cbd5e1;
  --gray-100: #f1f5f9;
  --white:    #ffffff;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, #34d399 100%);
  --gradient-hero:    linear-gradient(135deg, #0f1923 0%, #1a4a7a 50%, #0f7d5b 100%);
  --gradient-card:    linear-gradient(135deg, rgba(15,125,91,0.08) 0%, rgba(26,74,122,0.08) 100%);

  /* Typography */
  --font-heading: 'Lora', Georgia, serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Spacing & Shape */
  --radius:    12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow:    0 4px 20px rgba(0,0,0,0.10);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.15);

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.25s var(--ease);
}

/* =========================================================
   RESET & BASE STYLES
========================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--font-body);
  color: var(--gray-700);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }

/* =========================================================
   TYPOGRAPHY UTILITIES
========================================================= */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--gray-900);
  line-height: 1.25;
  font-weight: 700;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(15, 125, 91, 0.1);
  border: 1px solid rgba(15, 125, 91, 0.25);
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--gray-900);
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--gray-500);
  max-width: 580px;
  margin: 0 auto;
}

.subsection-title {
  font-size: 1.2rem;
  font-family: var(--font-body);
  font-weight: 700;
  color: var(--gray-900);
}

.section-padding { padding: 90px 0; }

.bg-light-section { background: var(--gray-100); }

/* =========================================================
   NAVBAR
========================================================= */
.navbar {
  background: rgba(15, 25, 35, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 12px 0;
  transition: all var(--transition);
  z-index: 1050;
}

.navbar.scrolled {
  padding: 8px 0;
  box-shadow: var(--shadow-lg);
}

.navbar-brand {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white) !important;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: inline-block;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(15,125,91,0.6); }
  50%       { box-shadow: 0 0 0 8px rgba(15,125,91,0); }
}

.navbar .nav-link {
  color: rgba(255,255,255,0.7) !important;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 14px !important;
  border-radius: 8px;
  transition: all var(--transition);
  position: relative;
}

.navbar .nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 14px; right: 14px;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
  border-radius: 2px;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
  color: var(--white) !important;
  background: rgba(255,255,255,0.06);
}

.navbar .nav-link:hover::after,
.navbar .nav-link.active::after { transform: scaleX(1); }

.navbar .btn-primary {
  background: var(--gradient-primary);
  border: none;
  border-radius: 8px;
  font-weight: 600;
  padding: 8px 20px;
  transition: all var(--transition);
  box-shadow: 0 4px 15px rgba(15,125,91,0.35);
}

.navbar .btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(15,125,91,0.45);
}

.navbar-toggler {
  border: 1px solid rgba(255,255,255,0.2);
  padding: 6px 10px;
}

.navbar-toggler:focus { box-shadow: none; }

.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}

@media (max-width: 991.98px) {
  .navbar-collapse {
    background: rgba(15, 25, 35, 0.98);
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 16px;
    margin-top: 8px;
    border-radius: var(--radius);
  }
  .navbar .nav-link { border-radius: 0; border-bottom: 1px solid rgba(255,255,255,0.06); }
  .navbar .btn-primary { width: 100%; margin-top: 12px; text-align: center; }
}

/* =========================================================
   HERO SECTION
========================================================= */
.hero-section {
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 70% 50%, rgba(15,125,91,0.25) 0%, transparent 60%),
    radial-gradient(ellipse at 20% 80%, rgba(26,74,122,0.3) 0%, transparent 50%);
  pointer-events: none;
}

/* Animated particles */
.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 25% 25%, rgba(15,125,91,0.15) 1px, transparent 1px),
    radial-gradient(circle at 75% 75%, rgba(26,74,122,0.15) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.4;
  animation: driftBg 20s linear infinite;
}

@keyframes driftBg {
  0%   { background-position: 0 0, 30px 30px; }
  100% { background-position: 60px 60px, 90px 90px; }
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--primary-light);
  border: 1px solid rgba(26,173,128,0.4);
  border-radius: 100px;
  padding: 6px 16px;
  background: rgba(26,173,128,0.08);
}

.hero-title {
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  line-height: 1.05;
  color: var(--white);
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.72);
  max-width: 500px;
  line-height: 1.75;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.85);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 500;
  backdrop-filter: blur(8px);
}

/* Hero Buttons */
.hero-section .btn-primary {
  background: var(--gradient-primary);
  border: none;
  border-radius: 50px;
  font-weight: 600;
  padding: 14px 30px;
  box-shadow: 0 8px 25px rgba(15,125,91,0.40);
  transition: all var(--transition);
}

.hero-section .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(15,125,91,0.55);
}

.hero-section .btn-outline-light {
  border-radius: 50px;
  font-weight: 600;
  padding: 14px 30px;
  border-color: rgba(255,255,255,0.35);
  color: var(--white);
  transition: all var(--transition);
}

.hero-section .btn-outline-light:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.7);
  transform: translateY(-3px);
}

/* Hero Image */
.hero-image-wrapper {
  position: relative;
  display: inline-block;
}

.hero-image-glow {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 380px; height: 380px;
  background: radial-gradient(circle, rgba(15,125,91,0.35) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: glowPulse 4s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
  50%       { opacity: 1;   transform: translate(-50%, -50%) scale(1.1); }
}

.hero-profile-img {
  width: 320px;
  height: 320px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 4px solid rgba(15,125,91,0.5);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 0 8px rgba(15,125,91,0.1);
  position: relative;
  z-index: 1;
  transition: transform var(--transition), box-shadow var(--transition);
}

.hero-profile-img:hover {
  transform: scale(1.03);
  box-shadow: 0 25px 70px rgba(0,0,0,0.5), 0 0 0 12px rgba(15,125,91,0.15);
}

@media (max-width: 767.98px) {
  .hero-profile-img { width: 220px; height: 220px; }
  .hero-image-glow  { width: 270px; height: 270px; }
}

/* Floating stat badges */
.hero-stat-badge {
  position: absolute;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(16px);
  border-radius: 14px;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-lg);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--gray-900);
  z-index: 2;
  animation: floatBadge 3s ease-in-out infinite;
}

.hero-stat-badge i { font-size: 1.4rem; }

.badge-publications {
  top: 10px; right: -10px;
  animation-delay: 0s;
}

.badge-publications i { color: var(--primary); }

.badge-experience {
  bottom: 20px; left: -10px;
  animation-delay: 1.5s;
}

.badge-experience i { color: var(--secondary); }

@keyframes floatBadge {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

@media (max-width: 575.98px) {
  .hero-stat-badge { display: none; }
}

/* Scroll Indicator */
.hero-scroll-indicator {
  position: absolute;
  bottom: 30px; left: 50%;
  transform: translateX(-50%);
}

.hero-scroll-indicator a {
  color: rgba(255,255,255,0.5);
  font-size: 1.5rem;
  animation: scrollBounce 2s ease-in-out infinite;
  display: block;
  transition: color var(--transition);
}

.hero-scroll-indicator a:hover { color: var(--primary-light); }

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50%       { transform: translateY(8px); opacity: 1; }
}

/* =========================================================
   STATS BAR
========================================================= */
.stats-bar {
  background: var(--dark);
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.stat-item { padding: 10px 0; }

.stat-number {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-family: var(--font-heading);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-number::after { content: '+'; }

.stat-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(255,255,255,0.5);
  margin-top: 4px;
  font-weight: 500;
}

/* =========================================================
   ABOUT SECTION
========================================================= */
.about-image-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-profile-img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  object-position: center top;
  display: block;
  transition: transform 0.6s var(--ease);
}

.about-image-card:hover .about-profile-img { transform: scale(1.04); }

.about-card-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(15,25,35,0.85));
  padding: 30px 24px 24px;
  display: flex;
  justify-content: center;
}

.about-social-links { display: flex; gap: 12px; }

.social-link {
  width: 40px; height: 40px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white) !important;
  font-size: 1rem;
  transition: all var(--transition);
  backdrop-filter: blur(8px);
}

.social-link:hover {
  background: var(--primary);
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(15,125,91,0.45);
}

.about-text { font-size: 1.02rem; color: var(--gray-700); }

.about-info-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 14px 16px;
  border: 1px solid var(--gray-300);
  transition: all var(--transition);
}

.about-info-item:hover {
  border-color: rgba(15,125,91,0.35);
  box-shadow: var(--shadow-sm);
  background: rgba(15,125,91,0.04);
}

.about-info-item i {
  font-size: 1.2rem;
  color: var(--primary);
  margin-top: 2px;
  flex-shrink: 0;
}

.about-info-item div { display: flex; flex-direction: column; }
.about-info-item small { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 1px; color: var(--gray-500); font-weight: 600; }
.about-info-item span { font-size: 0.9rem; font-weight: 600; color: var(--gray-900); }

/* About Buttons */
.btn-primary {
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  color: var(--white);
  transition: all var(--transition);
  box-shadow: 0 4px 15px rgba(15,125,91,0.30);
}

.btn-primary:hover {
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(15,125,91,0.45);
}

.btn-outline-primary {
  border-color: var(--primary);
  color: var(--primary);
  border-radius: var(--radius);
  font-weight: 600;
  transition: all var(--transition);
}

.btn-outline-primary:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}

/* =========================================================
   ACADEMIC / EDUCATION SECTION
========================================================= */
.edu-card {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 28px;
  height: 100%;
  position: relative;
  transition: all var(--transition);
  overflow: hidden;
}

.edu-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition);
}

.edu-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(15,125,91,0.3); }
.edu-card:hover::before { opacity: 1; }

.edu-card.featured {
  border-color: rgba(15,125,91,0.4);
  background: linear-gradient(135deg, rgba(15,125,91,0.04) 0%, rgba(26,74,122,0.04) 100%);
  box-shadow: 0 0 0 1px rgba(15,125,91,0.2), var(--shadow);
}

.edu-card.featured::before { opacity: 1; }

.edu-card-icon {
  width: 50px; height: 50px;
  background: var(--gradient-primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.4rem;
  margin-bottom: 20px;
  box-shadow: 0 6px 18px rgba(15,125,91,0.35);
}

.edu-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 100px;
  background: rgba(100,116,139,0.12);
  color: var(--gray-500);
  margin-bottom: 10px;
}

.edu-badge.featured { background: rgba(15,125,91,0.12); color: var(--primary); }

.edu-degree { font-size: 1.05rem; color: var(--gray-900); margin-bottom: 6px; }
.edu-institution { font-size: 0.88rem; color: var(--gray-500); font-weight: 600; margin-bottom: 6px; }
.edu-year { font-size: 0.8rem; color: var(--gray-500); margin-bottom: 10px; }
.edu-desc { font-size: 0.88rem; color: var(--gray-700); margin-bottom: 14px; }

.edu-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.edu-tags span {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
  background: var(--gray-100);
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
}

/* Certifications */
.cert-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  padding: 14px 18px;
  transition: all var(--transition);
}

.cert-item:hover {
  border-color: rgba(15,125,91,0.3);
  box-shadow: var(--shadow-sm);
  transform: translateX(4px);
}

.cert-item i { font-size: 1.5rem; margin-top: 2px; flex-shrink: 0; }
.cert-item div { display: flex; flex-direction: column; }
.cert-item strong { font-size: 0.88rem; color: var(--gray-900); }
.cert-item small { font-size: 0.78rem; color: var(--gray-500); margin-top: 2px; }

/* =========================================================
   EXPERIENCE TIMELINE
========================================================= */
.timeline-wrapper {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
  padding-left: 0;
}

.timeline-wrapper::before {
  content: '';
  position: absolute;
  left: 28px;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--secondary));
  opacity: 0.25;
}

.timeline-item {
  display: flex;
  gap: 24px;
  margin-bottom: 36px;
  position: relative;
}

.timeline-dot {
  width: 58px;
  height: 58px;
  min-width: 58px;
  background: var(--white);
  border: 2px solid var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--primary);
  box-shadow: 0 0 0 6px rgba(15,125,91,0.08), var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  z-index: 1;
}

.timeline-item:hover .timeline-dot {
  background: var(--primary);
  color: var(--white);
  transform: scale(1.1);
  box-shadow: 0 0 0 8px rgba(15,125,91,0.12), 0 6px 20px rgba(15,125,91,0.35);
}

.timeline-card {
  flex: 1;
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition);
}

.timeline-card:hover {
  border-color: rgba(15,125,91,0.3);
  box-shadow: var(--shadow);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.timeline-role {
  font-size: 1.05rem;
  color: var(--gray-900);
  margin-bottom: 4px;
}

.timeline-org {
  font-size: 0.85rem;
  color: var(--gray-500);
  font-weight: 500;
  margin: 0;
}

.badge-period {
  font-size: 0.76rem;
  font-weight: 700;
  background: rgba(15,125,91,0.1);
  color: var(--primary);
  border: 1px solid rgba(15,125,91,0.25);
  padding: 4px 12px;
  border-radius: 100px;
  white-space: nowrap;
}

.timeline-duties {
  list-style: none;
  padding: 0;
  margin-bottom: 14px;
}

.timeline-duties li {
  font-size: 0.9rem;
  color: var(--gray-700);
  padding: 4px 0 4px 20px;
  position: relative;
}

.timeline-duties li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-size: 0.85rem;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.timeline-tags span {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
  background: var(--gray-100);
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
}

@media (max-width: 575.98px) {
  .timeline-wrapper::before { left: 22px; }
  .timeline-dot { width: 46px; height: 46px; min-width: 46px; font-size: 1rem; }
  .timeline-header { flex-direction: column; }
}

/* =========================================================
   RESEARCH ARTICLES
========================================================= */
.research-filter { gap: 10px; }

.filter-btn {
  font-size: 0.82rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 100px;
  border: 1.5px solid var(--gray-300);
  background: var(--white);
  color: var(--gray-700);
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 15px rgba(15,125,91,0.30);
}

.research-card {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 24px;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.research-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.research-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(15,125,91,0.25);
}

.research-card:hover::after { transform: scaleX(1); }

.research-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.research-tag {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.research-tag.maternal   { background: rgba(14,165,233,0.12); color: #0284c7; }
.research-tag.infectious { background: rgba(239,68,68,0.12);  color: #dc2626; }
.research-tag.policy     { background: rgba(139,92,246,0.12); color: #7c3aed; }
.research-tag.nutrition  { background: rgba(245,158,11,0.12); color: #d97706; }

.research-year {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--gray-500);
  background: var(--gray-100);
  padding: 3px 10px;
  border-radius: 100px;
}

.research-title {
  font-size: 0.97rem;
  font-family: var(--font-heading);
  color: var(--gray-900);
  margin-bottom: 10px;
  flex-grow: 1;
  line-height: 1.4;
}

.research-authors, .research-journal {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-bottom: 6px;
}

.research-abstract {
  font-size: 0.84rem;
  color: var(--gray-700);
  margin-bottom: 14px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.research-metrics {
  display: flex;
  gap: 14px;
  font-size: 0.78rem;
  color: var(--gray-500);
  margin-bottom: 14px;
  font-weight: 500;
}

.research-link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all var(--transition);
  margin-top: auto;
}

.research-link:hover {
  color: var(--primary-dark);
  gap: 8px;
}

/* Hidden filter items */
.research-item.hidden {
  display: none;
}

/* =========================================================
   SKILLS SECTION
========================================================= */
.skills-group-title {
  font-size: 1rem;
  font-family: var(--font-body);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
}

.skill-bar-list { display: flex; flex-direction: column; gap: 16px; }

.skill-item {}

.skill-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--gray-700);
}

.skill-pct { color: var(--primary); font-weight: 700; }

.skill-progress {
  height: 8px;
  background: var(--gray-100);
  border-radius: 100px;
  overflow: hidden;
  border: 1px solid var(--gray-300);
}

.skill-fill {
  height: 100%;
  width: 0;
  background: var(--gradient-primary);
  border-radius: 100px;
  transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-fill.animated { width: var(--fill); }

/* Tools Grid */
.tools-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.tool-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--white);
  border: 1.5px solid var(--gray-300);
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  transition: all var(--transition);
  cursor: default;
}

.tool-chip i { color: var(--primary); font-size: 1rem; }

.tool-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
  background: rgba(15,125,91,0.04);
}

/* =========================================================
   AWARDS SECTION
========================================================= */
.award-card {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.award-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-card);
  opacity: 0;
  transition: opacity var(--transition);
}

.award-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(15,125,91,0.3);
}

.award-card:hover::before { opacity: 1; }

.award-card.featured {
  background: linear-gradient(135deg, rgba(15,125,91,0.06) 0%, rgba(26,74,122,0.06) 100%);
  border-color: rgba(15,125,91,0.35);
  box-shadow: var(--shadow);
}

.award-icon {
  width: 64px; height: 64px;
  background: var(--gradient-primary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.8rem;
  margin: 0 auto 18px;
  box-shadow: 0 8px 24px rgba(15,125,91,0.35);
  position: relative;
  z-index: 1;
}

.award-title {
  font-size: 1rem;
  color: var(--gray-900);
  margin-bottom: 6px;
  position: relative;
  z-index: 1;
}

.award-org {
  font-size: 0.8rem;
  color: var(--gray-500);
  font-weight: 500;
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}

.award-year {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  background: rgba(15,125,91,0.1);
  display: inline-block;
  padding: 3px 14px;
  border-radius: 100px;
  position: relative;
  z-index: 1;
}

/* =========================================================
   CONTACT SECTION
========================================================= */
.contact-info-card {
  background: var(--dark);
  border-radius: var(--radius-lg);
  padding: 34px;
  color: var(--white);
}

.contact-info-title {
  font-size: 1.2rem;
  color: var(--white);
  font-family: var(--font-heading);
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.contact-info-item:last-of-type { border-bottom: none; }

.contact-info-icon {
  width: 44px; height: 44px;
  min-width: 44px;
  background: rgba(15,125,91,0.2);
  border: 1px solid rgba(15,125,91,0.35);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--primary-light);
}

.contact-info-item div { display: flex; flex-direction: column; }
.contact-info-item small { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 1px; color: rgba(255,255,255,0.4); font-weight: 600; }
.contact-info-item span,
.contact-info-item a { font-size: 0.9rem; color: rgba(255,255,255,0.85); font-weight: 500; }
.contact-info-item a:hover { color: var(--primary-light); }

.contact-social { display: flex; gap: 10px; }

.social-btn {
  width: 42px; height: 42px;
  border-radius: 12px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.7) !important;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all var(--transition);
}

.social-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white) !important;
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(15,125,91,0.45);
}

.contact-map { border: 1px solid var(--gray-300); }

/* Contact Form */
.contact-form-card {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 34px;
  box-shadow: var(--shadow-sm);
}

.contact-form-card .form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.contact-form-card .form-control,
.contact-form-card .form-select {
  border: 1.5px solid var(--gray-300);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 0.9rem;
  color: var(--gray-900);
  transition: all var(--transition);
  background: var(--gray-100);
}

.contact-form-card .form-control:focus,
.contact-form-card .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15,125,91,0.12);
  background: var(--white);
  outline: none;
}

.contact-form-card .form-control::placeholder { color: var(--gray-500); }

.contact-form-card .btn-primary {
  padding: 14px;
  font-size: 1rem;
  border-radius: 12px;
  letter-spacing: 0.3px;
}

/* =========================================================
   FOOTER
========================================================= */
.site-footer { background: var(--dark); }

.footer-top { padding: 60px 0 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }

.footer-brand {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--white);
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
  max-width: 300px;
  margin-bottom: 20px;
}

.footer-socials { display: flex; gap: 10px; }

.footer-socials a {
  width: 38px; height: 38px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  font-size: 0.95rem;
  transition: all var(--transition);
}

.footer-socials a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
  transform: translateY(-3px);
}

.footer-heading {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: rgba(255,255,255,0.35);
  margin-bottom: 16px;
  font-family: var(--font-body);
}

.footer-links { list-style: none; padding: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.55);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--primary-light); }

.footer-bottom {
  padding: 20px 0;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.35);
}

.footer-made { display: flex; align-items: center; gap: 4px; }

/* =========================================================
   BACK TO TOP BUTTON
========================================================= */
.back-to-top {
  position: fixed;
  bottom: 30px; right: 30px;
  width: 48px; height: 48px;
  background: var(--gradient-primary);
  border: none;
  border-radius: 14px;
  color: var(--white);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
  transition: all var(--transition);
  box-shadow: 0 6px 20px rgba(15,125,91,0.40);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.back-to-top:hover { transform: translateY(-4px); box-shadow: 0 10px 28px rgba(15,125,91,0.55); }

/* =========================================================
   BOOTSTRAP OVERRIDES
========================================================= */
.alert-success {
  background: rgba(15,125,91,0.1);
  border: 1px solid rgba(15,125,91,0.3);
  color: var(--primary-dark);
  border-radius: 10px;
}

.alert-danger {
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.3);
  color: #b91c1c;
  border-radius: 10px;
}

/* =========================================================
   RESPONSIVE TWEAKS
========================================================= */
@media (max-width: 991.98px) {
  .section-padding { padding: 70px 0; }
  .about-profile-img { height: 380px; }
}

@media (max-width: 767.98px) {
  .section-padding { padding: 55px 0; }
  .about-profile-img { height: 300px; }
  .contact-info-card { padding: 24px; }
  .contact-form-card { padding: 24px; }
  .hero-title { font-size: clamp(2.2rem, 10vw, 3rem); }
}

@media (max-width: 575.98px) {
  .section-padding { padding: 45px 0; }
  .section-title { font-size: 1.7rem; }
  .timeline-wrapper::before { display: none; }
  .timeline-item { flex-direction: column; gap: 12px; }
  .timeline-dot { width: 42px; height: 42px; font-size: 0.9rem; }
  .tools-grid { justify-content: flex-start; }
  .footer-top { padding: 40px 0 28px; }
}

/* AOS smooth entry */
[data-aos] { will-change: transform, opacity; }

/* =========================================================
   PUBLIC HEALTH BACKGROUND CANVAS ANIMATIONS
   ========================================================= */

/* Fixed full-page canvas — sits behind every section */
#bgHealthCanvas {
  position: fixed;
  top: 0; left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  display: block;
}

/* Hero-specific canvas — absolute inside .hero-section */
#heroHealthCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  display: block;
}