/* ============================================================
   RAGHU RAM KOMARA — PORTFOLIO WEBSITE
   Aesthetic: Light blue hero · Floating cards · Skill bars ·
              Specialties cards · Portfolio grid with filters
   Fonts: Poppins (display/headings) + DM Sans (body)
   ============================================================ */

:root {
  --primary:       #2B4FBF;
  --primary-dark:  #1E3A9B;
  --primary-light: #4F6FE8;
  --primary-xlt:   #EEF3FF;
  --accent:        #E8543A;
  --green:         #167A4A;
  --green-lt:      #E8FFF3;
  --amber:         #D4870F;
  --amber-lt:      #FFF8E8;
  --hero-bg:       #EBF1FF;
  --services-bg:   #EEEEF8;
  --text:          #1A1A2E;
  --text-muted:    #6B7280;
  --text-light:    #9CA3AF;
  --border:        #E5E7EB;
  --surface:       #FFFFFF;
  --bg:            #FFFFFF;
  --bg-light:      #F8F9FC;
  --shadow:        0 4px 20px rgba(43,79,191,0.08);
  --shadow-md:     0 8px 32px rgba(43,79,191,0.12);
  --shadow-lg:     0 16px 48px rgba(43,79,191,0.16);
  --radius:        16px;
  --radius-sm:     10px;
  --radius-full:   999px;
  --transition:    0.25s ease;
  --max-w:         1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

strong {
  font-weight: 600;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

.logo-dot {
  color: var(--accent);
}

.text-center {
  text-align: center;
}

.w-full {
  width: 100%;
}

/* ============================================================
   SHARED TYPOGRAPHY
   ============================================================ */

.sec-eyebrow {
  font-family: 'Poppins', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.sec-heading {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.sec-sub {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto 3rem;
  line-height: 1.75;
}

/* ============================================================
   SHARED BUTTONS
   ============================================================ */

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 2rem;
  font-family: 'Poppins', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: #fff;
  background: var(--primary);
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(43,79,191,0.3);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(43,79,191,0.35);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 2rem;
  font-family: 'Poppins', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  background: transparent;
  border: 2px solid var(--border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-xlt);
}

.btn-outline-blue {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 2rem;
  font-family: 'Poppins', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  border: 2px solid var(--primary);
  border-radius: var(--radius-full);
  transition: all var(--transition);
}

.btn-outline-blue:hover {
  background: var(--primary);
  color: #fff;
}

/* ============================================================
   NAVIGATION
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}

.nav.scrolled {
  box-shadow: var(--shadow);
}

.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.logo-icon {
  display: flex;
  align-items: center;
}

.logo-text {
  font-family: 'Poppins', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nl {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nl:hover {
  color: var(--primary);
  background: var(--primary-xlt);
}

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1.5rem;
  font-family: 'Poppins', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  background: var(--primary);
  border-radius: var(--radius-full);
  transition: all var(--transition);
  white-space: nowrap;
}

.nav-cta-btn:hover {
  background: var(--primary-dark);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================================
   HERO — Light blue background, photo right, floating cards
   ============================================================ */

.hero {
  background: var(--hero-bg);
  min-height: 100vh;
  padding-top: 70px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
}

/* Decorative dots */
.deco-dots {
  position: absolute;
  pointer-events: none;
  z-index: 0;
}

.deco-tr {
  top: 80px;
  right: 3%;
}

/* Diagonal lines decoration */
.deco-lines {
  position: absolute;
  bottom: 10%;
  left: 2%;
  width: 80px;
  height: 60px;
  pointer-events: none;
}

.deco-lines::before {
  content: '';
  display: block;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    -55deg,
    transparent,
    transparent 4px,
    rgba(43,79,191,0.2) 4px,
    rgba(43,79,191,0.2) 5px
  );
}

.hero-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 4rem 2rem;
  display: grid;
  grid-template-columns: 1fr 480px;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
  width: 100%;
}

.hero-greeting {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.hero-name {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  color: var(--text);
  line-height: 1.1;
  margin-bottom: 0.25rem;
}

.hero-title-blue {
  color: var(--primary);
}

.hero-role {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(1.2rem, 2.5vw, 1.75rem);
  font-weight: 600;
  color: var(--text-muted);
  line-height: 1.3;
  margin-bottom: 1.25rem;
}

.hero-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 460px;
  line-height: 1.8;
  margin-bottom: 2rem;
}

.hero-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.hero-social {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.social-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: #fff;
  border-radius: var(--radius-sm);
  color: var(--primary);
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.social-icon:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Hero visual */
.hero-visual {
  position: relative;
  height: 520px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.hero-circle-bg {
  position: absolute;
  width: 380px;
  height: 380px;
  background: linear-gradient(135deg, rgba(43,79,191,0.15), rgba(79,111,232,0.1));
  border-radius: 50%;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  z-index: 0;
}

.hero-photo-wrap {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.hero-photo {
  height: 480px;
  width: auto;
  max-width: 380px;
  object-fit: cover;
  object-position: center top;
  display: block;
  border-radius: 0 0 var(--radius) var(--radius);
  filter: drop-shadow(0 20px 40px rgba(43,79,191,0.15));
  mix-blend-mode: multiply;
}

/* Floating cards — compact so they do not cover the profile image */
.float-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(229, 231, 235, 0.9);
  border-radius: 12px;
  padding: 0.55rem 0.75rem;
  box-shadow: 0 8px 24px rgba(43, 79, 191, 0.12);
  display: flex;
  align-items: center;
  gap: 0.45rem;
  z-index: 3;
  min-width: 0;
  max-width: 210px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: floatCard 3s ease-in-out infinite;
}

.float-card-top {
  top: 12%;
  right: -0.75rem;
}

.float-card-bottom {
  bottom: 10%;
  left: -0.75rem;
  animation-delay: 1.5s;
}

@keyframes floatCard {
  0%, 100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-6px);
  }
}

.float-card-icon {
  width: 28px;
  height: 28px;
  min-width: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-xlt);
  border-radius: 50%;
  font-size: 0.95rem;
  line-height: 1;
  flex-shrink: 0;
}

.float-card-text {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
}

.float-card-text strong {
  font-family: 'Poppins', sans-serif;
  font-size: 0.74rem;
  line-height: 1.15;
  font-weight: 700;
  color: var(--text);
}

.float-card-text span {
  font-size: 0.64rem;
  line-height: 1.25;
  color: var(--text-muted);
}

/* ============================================================
   SECTIONS
   ============================================================ */

.section {
  padding: 6rem 0;
}

.about-section {
  background: var(--bg);
}

.specialties-section {
  background: var(--services-bg);
}

.portfolio-section {
  background: var(--bg);
}

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

.research-section {
  background: var(--bg);
}

.contact-section {
  background: var(--hero-bg);
}

/* ============================================================
   ABOUT — B+A: Timeline + Stat Cards
   ============================================================ */

.about-sub {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 2.5rem;
}

/* Stat cards row (Option A) */
.about-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 4rem;
}

.astat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.astat:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.astat-n {
  display: block;
  font-family: 'Poppins', sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.astat-l {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  line-height: 1.4;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Timeline (Option B) */
.about-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-left: 2.5rem;
  margin-bottom: 3rem;
}

.about-timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary-light), var(--primary-xlt));
  border-radius: 2px;
}

.atl-item {
  position: relative;
  padding-bottom: 2.5rem;
}
.atl-item:last-child { padding-bottom: 0; }

.atl-dot {
  position: absolute;
  left: -2.5rem;
  top: 14px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--surface);
  border: 2.5px solid var(--primary-light);
  margin-left: 4px;
  z-index: 1;
}

.atl-dot-active {
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(43, 79, 191, 0.15);
  width: 16px;
  height: 16px;
  margin-left: 3px;
}

.atl-year {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
  margin-bottom: 0.6rem;
}

.atl-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.atl-card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(43,79,191,0.2);
}

.atl-card-active {
  border-color: var(--primary-light);
  border-left: 3px solid var(--primary);
  box-shadow: var(--shadow-md);
}

.atl-card-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.atl-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.22rem 0.65rem;
  border-radius: var(--radius-full);
}

.atl-badge-blue   { background: var(--primary-xlt); color: var(--primary); }
.atl-badge-purple { background: #F3EEFF; color: #6B3FA0; }
.atl-badge-orange { background: var(--amber-lt); color: var(--amber); }
.atl-badge-green  { background: var(--green-lt); color: var(--green); }

.atl-company {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.atl-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1rem;
}
.atl-card p strong { color: var(--primary); font-weight: 600; }

.atl-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.atl-tags span {
  font-size: 0.72rem;
  padding: 0.2rem 0.6rem;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-muted);
}

.about-btns-center {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* ============================================================
   SPECIALTIES
   ============================================================ */

.specialties-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.specialty-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.specialty-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  opacity: 0;
  transition: opacity var(--transition);
}

.specialty-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(30, 80, 231, 0.25);
}

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

.specialty-card-highlight {
  background: var(--surface);
  color: inherit;
  border-color: var(--primary-light);
  box-shadow: 0 8px 28px rgba(43, 79, 191, 0.13);
}

.specialty-card-highlight::before {
  background: linear-gradient(90deg, var(--primary-light), rgba(79, 111, 232, 0.3));
  opacity: 1;
}

.specialty-card-highlight h3,
.specialty-card-highlight p,
.specialty-card-highlight .specialty-link {
  color: inherit;
}

.specialty-card-highlight .specialty-badge {
  background: var(--primary-xlt);
  color: var(--primary);
  border-color: rgba(43, 79, 191, 0.18);
}

.specialty-card-highlight .specialty-tags span {
  background: var(--bg-light);
  color: var(--text-muted);
  border-color: var(--border);
}

.specialty-card-highlight .specialty-icon {
  background: var(--primary-xlt);
  color: var(--primary);
}

.specialty-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.25rem;
}

.specialty-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  background: var(--primary-xlt);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  flex-shrink: 0;
}

/* .specialty-card-highlight .specialty-icon — now defined in highlight block above */

.specialty-badge {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: var(--primary-xlt);
  color: var(--primary);
  border: 1px solid rgba(43, 79, 191, 0.12);
  white-space: nowrap;
}

.specialty-card h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
}

.specialty-card p {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.7;
  flex: 1;
}

.specialty-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.25rem;
}

.specialty-tags span {
  font-size: 0.72rem;
  padding: 0.22rem 0.6rem;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-muted);
}

.specialty-link {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: 0.2rem;
  transition: gap var(--transition), color var(--transition);
}

.specialty-link:hover {
  gap: 0.5rem;
  color: var(--primary-dark);
}

/* ============================================================
   PORTFOLIO — Filter + grid
   ============================================================ */

.portfolio-filters {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.pf-btn {
  padding: 0.55rem 1.5rem;
  font-family: 'Poppins', sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  background: var(--bg-light);
  border: 2px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.pf-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-xlt);
}

.pf-active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.portfolio-card {
  background: var(--bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid var(--border);
}

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

.portfolio-card.hidden {
  display: none;
}

.featured-card {
  border-color: rgba(43,79,191,0.2);
  box-shadow: 0 4px 20px rgba(43,79,191,0.12);
}

.portfolio-card-img {
  overflow: hidden;
}

.pcard-placeholder {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.pcard-icon {
  font-size: 3rem;
  position: relative;
  z-index: 1;
}

.pcard-pattern {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    45deg,
    rgba(255,255,255,0.06),
    rgba(255,255,255,0.06) 10px,
    transparent 10px,
    transparent 20px
  );
}

.research-bg {
  background: linear-gradient(135deg, #1A2B6B, #2B4FBF);
}

.healthcare-bg {
  background: linear-gradient(135deg, #0D4A2E, #167A4A);
}

.clinicos-bg {
  background: linear-gradient(135deg, #1A4A35, #24A96A);
}

.radiology-bg {
  background: linear-gradient(135deg, #5C1A0D, #C0392B);
}

.flids-bg {
  background: linear-gradient(135deg, #2D1B4E, #6C3483);
}

.cv-bg {
  background: linear-gradient(135deg, #1A3A4A, #2E86C1);
}

.portfolio-card-body {
  padding: 1.5rem;
}

.pcard-cat {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
  background: var(--primary-xlt);
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  display: inline-block;
  margin-bottom: 0.75rem;
}

.pcat-health {
  color: var(--green);
  background: var(--green-lt);
}

.pcat-active {
  color: var(--amber);
  background: var(--amber-lt);
}

.portfolio-card-body h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 0.6rem;
}

.portfolio-card-body p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 0.85rem;
}

.pcard-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.pcard-tags span {
  font-size: 0.72rem;
  padding: 0.2rem 0.6rem;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
}

.pcard-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary);
  transition: gap var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.pcard-link:hover {
  gap: 0.5rem;
}

/* ============================================================
   EXPERIENCE — Cards
   ============================================================ */

.exp-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.exp-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}

.exp-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.exp-card-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.exp-card-icon {
  font-size: 1.5rem;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.exp-icon-1 {
  background: rgba(43,79,191,0.1);
}

.exp-icon-2 {
  background: rgba(79,111,232,0.1);
}

.exp-icon-3 {
  background: rgba(22,122,74,0.1);
}

.exp-icon-4 {
  background: rgba(232,84,58,0.1);
}

.exp-card-header h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.exp-co {
  font-size: 0.82rem;
  color: var(--primary);
  font-weight: 500;
}

.exp-date-badge {
  margin-left: auto;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  background: var(--primary-xlt);
  color: var(--primary);
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}

.exp-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.exp-list li {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  padding-left: 1.25rem;
  position: relative;
}

.exp-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary-light);
  font-size: 0.75rem;
  top: 0.25rem;
}

.exp-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.exp-card-tags span {
  font-size: 0.72rem;
  padding: 0.2rem 0.6rem;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
}

/* ============================================================
   RESEARCH
   ============================================================ */

.research-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.research-pub-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

.research-pub-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.published-card {
  border-top: 4px solid var(--green);
}

.prep-card {
  border-top: 4px solid var(--amber);
}

.rpub-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  background: var(--green-lt);
  color: var(--green);
  border: 1px solid rgba(22,122,74,0.2);
  align-self: flex-start;
}

.rpub-badge-prep {
  background: var(--amber-lt);
  color: var(--amber);
  border-color: rgba(212,135,15,0.2);
}

.research-pub-card h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}

.research-pub-card > p:first-of-type {
  font-size: 0.82rem;
  color: var(--primary);
  font-weight: 500;
}

.rpub-abstract {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.rpub-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.rpub-tags span {
  font-size: 0.72rem;
  padding: 0.2rem 0.6rem;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
}

/* ============================================================
   CONTACT
   ============================================================ */

.contact-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 3rem;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}

/* 2×2 Contact Card Grid */
.contact-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  max-width: 720px;
  margin: 0 auto 2.5rem;
}

.ccard {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-decoration: none;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.ccard:hover {
  transform: translateY(-3px);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-md);
}

.ccard-icon {
  width: 46px;
  height: 46px;
  background: var(--primary-xlt);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--primary);
  flex-shrink: 0;
}

.ccard-body {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  flex: 1;
  min-width: 0;
}

.ccard-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.ccard-value {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ccard-arrow {
  font-size: 1rem;
  color: var(--primary);
  opacity: 0;
  transform: translateX(-4px);
  transition: all var(--transition);
  flex-shrink: 0;
}
.ccard:hover .ccard-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* CTA row */
.contact-cta-row {
  display: flex;
  justify-content: center;
  margin-top: 0.5rem;
}

.contact-modal-btn {
  padding: 0.9rem 2.5rem;
  font-size: 1rem;
  letter-spacing: 0.01em;
  border-radius: var(--radius-full);
  cursor: pointer;
  border: none;
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
}

/* ============================================================
   CONTACT MODAL
   ============================================================ */

.cmodal-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(10, 15, 30, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.cmodal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.cmodal-box {
  background: var(--surface);
  border-radius: var(--radius);
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 24px 64px rgba(43,79,191,0.2);
  position: relative;
  transform: translateY(20px) scale(0.98);
  transition: transform 0.3s ease;
}

.cmodal-overlay.open .cmodal-box {
  transform: translateY(0) scale(1);
}

.cmodal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-light);
  border: 1px solid var(--border);
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  z-index: 1;
}
.cmodal-close:hover {
  background: var(--primary-xlt);
  color: var(--primary);
  border-color: var(--primary-light);
}

.cmodal-header {
  padding: 2rem 2rem 1rem;
  border-bottom: 1px solid var(--border);
}

.cmodal-header h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.35rem;
}

.cmodal-header p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.cmodal-iframe-wrap {
  padding: 0;
  overflow: hidden;
  border-radius: 0 0 var(--radius) var(--radius);
}

.cmodal-iframe-wrap iframe {
  display: block;
  width: 100%;
  border: none;
  border-radius: 0 0 var(--radius) var(--radius);
}

/* ============================================================
   FOOTER
   ============================================================ */

.footer {
  background: var(--text);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'Poppins', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}

.logo-icon-sm {
  display: flex;
  align-items: center;
}

.footer p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: #fff;
}

/* ============================================================
   ANIMATIONS
   ============================================================ */

.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1100px) {
  .hero-container {
    grid-template-columns: 1fr 380px;
    gap: 2rem;
  }

  .float-card {
    max-width: 185px;
    padding: 0.5rem 0.65rem;
  }

  .float-card-top {
    right: -0.35rem;
  }

  .float-card-bottom {
    left: -0.35rem;
  }

  .specialties-grid {
    grid-template-columns: 1fr 1fr;
  }

  .portfolio-grid {
    grid-template-columns: 1fr 1fr;
  }

  .exp-cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .nav-cta-btn {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-container {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    display: none;
  }

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

  .research-cards {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .exp-cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .container {
    padding: 0 1.25rem;
  }

  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .specialties-grid {
    grid-template-columns: 1fr;
  }

  .specialty-card {
    padding: 1.5rem;
  }

  .specialty-top {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 1.25rem;
    box-shadow: var(--shadow-md);
    z-index: 199;
  }
}
@media (max-width: 600px) {
  .contact-cards-grid { grid-template-columns: 1fr; }
  .cmodal-box { max-height: 95vh; }
}
/* ============================================================
   PROJECT CARD ACTIONS ROW
   ============================================================ */

.pcard-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.25rem;
}

.pcard-demo-btn {
  font-size: 0.82rem;
  font-weight: 600;
  font-family: 'DM Sans', sans-serif;
  color: var(--primary);
  background: var(--primary-xlt);
  border: 1px solid var(--primary-light);
  border-radius: var(--radius-full);
  padding: 0.3rem 0.85rem;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.pcard-demo-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* Clickable image overlay */
.pcard-img-clickable {
  position: relative;
  cursor: pointer;
}

.pcard-img-overlay {
  position: absolute;
  inset: 0;
  background: rgba(43, 79, 191, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
  border-radius: var(--radius) var(--radius) 0 0;
}
.pcard-img-clickable:hover .pcard-img-overlay {
  opacity: 1;
}
.pcard-img-overlay span {
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: 'DM Sans', sans-serif;
}

/* ============================================================
   RESEARCH PAPER ACTIONS
   ============================================================ */

.rpub-actions {
  margin-top: 0.5rem;
}

.rpub-view-btn {
  font-size: 0.85rem;
  font-weight: 600;
  font-family: 'DM Sans', sans-serif;
  color: var(--primary);
  background: var(--primary-xlt);
  border: 1.5px solid var(--primary-light);
  border-radius: var(--radius-full);
  padding: 0.45rem 1.1rem;
  cursor: pointer;
  transition: all var(--transition);
}
.rpub-view-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ============================================================
   PROJECT / PAPER MODALS — shared overlay
   ============================================================ */

.pmodal-overlay {
  position: fixed;
  inset: 0;
  z-index: 600;
  background: rgba(10, 15, 30, 0.70);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.pmodal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.pmodal-box {
  background: var(--surface);
  border-radius: var(--radius);
  width: 100%;
  max-height: 92vh;
  overflow-y: auto;
  box-shadow: 0 24px 64px rgba(0,0,0,0.35);
  transform: translateY(20px) scale(0.98);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
}
.pmodal-overlay.open .pmodal-box {
  transform: translateY(0) scale(1);
}

.pmodal-video-box  { max-width: 860px; }
.pmodal-lightbox-box { max-width: 860px; }
.pmodal-paper-box  { max-width: 800px; }

.pmodal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.pmodal-header h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin: 0;
}

.pmodal-header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pmodal-download-btn {
  font-size: 0.8rem;
  font-weight: 600;
  font-family: 'DM Sans', sans-serif;
  color: var(--primary);
  background: var(--primary-xlt);
  border: 1px solid var(--primary-light);
  border-radius: var(--radius-full);
  padding: 0.3rem 0.85rem;
  text-decoration: none;
  transition: all var(--transition);
}
.pmodal-download-btn:hover {
  background: var(--primary);
  color: #fff;
}

.pmodal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-light);
  border: 1px solid var(--border);
  font-size: 0.8rem;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}
.pmodal-close:hover {
  background: #FEE2E2;
  color: #DC2626;
  border-color: #FECACA;
}

/* Video modal */
.pmodal-video-wrap {
  position: relative;
  padding: 1.5rem;
}

.pmodal-video-placeholder {
  position: absolute;
  inset: 1.5rem;
  background: var(--bg-light);
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.vphold-inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}
.vphold-icon {
  font-size: 2.5rem;
  color: var(--primary-light);
}
.vphold-inner p {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  margin: 0;
}
.vphold-sub {
  font-size: 0.8rem !important;
  font-weight: 400 !important;
  color: var(--text-light) !important;
}

/* Lightbox grid */
.lightbox-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  padding: 1.5rem;
}

.lbx-slot {
  background: var(--bg-light);
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  aspect-ratio: 16/9;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  overflow: hidden;
}

.lbx-slot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.lbx-slot-placeholder {
  text-align: center;
  padding: 1rem;
}
.lbx-slot-placeholder span {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 0.35rem;
}
.lbx-slot-placeholder p {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: 0 0 0.2rem;
}
.lbx-slot-placeholder code {
  font-size: 0.7rem;
  color: var(--primary);
  background: var(--primary-xlt);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
}

.lightbox-hint {
  font-size: 0.78rem;
  color: var(--text-light);
  text-align: center;
  padding: 0 1.5rem 1.5rem;
}
.lightbox-hint code {
  color: var(--primary);
  background: var(--primary-xlt);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
}

/* Paper modal */
.pmodal-paper-wrap {
  padding: 0;
  flex: 1;
}
.pmodal-paper-wrap iframe {
  display: block;
  width: 100%;
  border: none;
}

@media (max-width: 600px) {
  .lightbox-grid { grid-template-columns: 1fr; }
  .pmodal-video-box, .pmodal-lightbox-box, .pmodal-paper-box { max-width: 100%; }
  .pcard-actions { flex-wrap: wrap; }
}