/* ============================================================
   Scholar Link – JIS College of Engineering
   styles.css – Complete Stylesheet
   ============================================================ */

/* ---------- CSS Custom Properties (Design Tokens) ---------- */
:root {
  /* Color Palette */
  --primary: #0a2463;          /* Deep Navy Blue */
  --primary-light: #1e3a8a;
  --primary-dark: #071a4a;
  --accent: #f6c90e;           /* Academic Gold */
  --accent-dark: #d4a800;
  --accent-light: #fde68a;
  --white: #ffffff;
  --off-white: #f8faff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-light: #e2e8f0;
  --border-color: rgba(255, 255, 255, 0.15);
  --card-bg: rgba(255, 255, 255, 0.08);
  --card-bg-solid: rgba(255, 255, 255, 0.95);
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 30px rgba(246, 201, 14, 0.3);

  /* Gradients */
  --grad-primary: linear-gradient(135deg, #0a2463 0%, #1e3a8a 50%, #1d4ed8 100%);
  --grad-accent: linear-gradient(135deg, #f6c90e, #d4a800);
  --grad-hero: linear-gradient(135deg, #071a4a 0%, #0a2463 40%, #1e3a8a 100%);
  --grad-card: linear-gradient(135deg, rgba(255,255,255,0.12), rgba(255,255,255,0.04));
  --grad-section-alt: linear-gradient(180deg, #f0f4ff 0%, #e8eeff 100%);

  /* Typography */
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Poppins', sans-serif;
  --font-serif: 'Merriweather', serif;

  /* Spacing */
  --section-padding: 100px 0;
  --container-max: 1280px;
  --container-padding: 0 24px;

  /* Borders & Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 40px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.35s ease;
  --transition-slow: 0.6s ease;
}

/* ---------- Reset & Base Styles ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background: var(--off-white);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

ul {
  list-style: none;
}

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

address {
  font-style: normal;
}

/* ---------- Utility Classes ---------- */
.section-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--container-padding);
}

.section {
  padding: var(--section-padding);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-badge {
  display: inline-block;
  background: var(--grad-accent);
  color: var(--primary-dark);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 6px 20px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  box-shadow: var(--shadow-glow);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  line-height: 1.2;
}

.section-divider {
  width: 80px;
  height: 4px;
  background: var(--grad-accent);
  border-radius: var(--radius-full);
  margin: 0 auto 20px;
}

.section-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Glass Card Effect */
.glass-card {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

/* Glass Card on Dark Background */
.dark-glass {
  background: rgba(10, 36, 99, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-base);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.5s, height 0.5s, opacity 0.5s;
  opacity: 0;
}

.btn:active::after {
  width: 200px;
  height: 200px;
  opacity: 0;
}

.btn-primary {
  background: var(--grad-accent);
  color: var(--primary-dark);
  box-shadow: 0 4px 20px rgba(246, 201, 14, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(246, 201, 14, 0.5);
  color: var(--primary-dark);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: var(--accent);
  transform: translateY(-2px);
  color: var(--accent);
}

.btn-resource {
  background: var(--grad-primary);
  color: var(--white);
  font-size: 0.85rem;
  padding: 10px 22px;
  margin-top: 12px;
}

.btn-resource:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  color: var(--accent-light);
}

.hidden {
  display: none !important;
}

/* ---------- HEADER ---------- */
#site-header {
  background: var(--grad-hero);
  position: relative;
  z-index: 100;
}

.header-top {
  padding: 32px 24px 20px;
  max-width: var(--container-max);
  margin: 0 auto;
}

.header-logos {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
}

.logo-item {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.logo-left { justify-content: flex-start; }
.logo-right { justify-content: flex-end; }
.logo-center { flex: 2; justify-content: center; }

.header-logo-img {
  height: 90px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.4));
  transition: transform var(--transition-base);
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  padding: 4px;
}

.header-logo-img:hover {
  transform: scale(1.05);
}

.center-logo {
  height: 120px;
  filter: drop-shadow(0 6px 20px rgba(246, 201, 14, 0.4));
}

/* Header Title Block */
.header-title {
  text-align: center;
  padding-bottom: 16px;
}

.site-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.02em;
  text-shadow: 0 2px 20px rgba(246, 201, 14, 0.3);
  line-height: 1.1;
  margin-bottom: 4px;
}

.site-subtitle {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 2vw, 1.4rem);
  font-weight: 400;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 8px;
}

.site-tagline {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.65);
  font-style: italic;
  margin-bottom: 28px;
}

/* Counters Row */
.counters-row {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.counter-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  padding: 16px 28px;
  min-width: 130px;
  transition: transform var(--transition-base), background var(--transition-base);
}

.counter-item:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-3px);
}

.counter-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  font-family: var(--font-heading);
  line-height: 1;
}

.counter-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.7);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 4px;
  text-align: center;
}

/* ---------- NAVIGATION ---------- */
.main-nav {
  background: rgba(5, 15, 60, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 2px solid var(--accent);
  position: sticky;
  top: 0;
  z-index: 999;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.main-nav.scrolled {
  background: rgba(5, 15, 60, 0.98);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent);
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-brand-icon {
  font-size: 1.2rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.nav-link {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent);
  background: rgba(246, 201, 14, 0.1);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 60%;
}

/* Nav Search */
.nav-search {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  padding: 6px 6px 6px 16px;
  gap: 8px;
  flex-shrink: 0;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.nav-search:focus-within {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.12);
}

.nav-search input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.85rem;
  width: 180px;
}

.nav-search input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

#nav-search-btn {
  background: var(--grad-accent);
  border: none;
  border-radius: var(--radius-full);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--primary-dark);
  transition: transform var(--transition-fast);
}

#nav-search-btn:hover {
  transform: scale(1.1);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  margin-left: auto;
}

.hamburger-line {
  width: 100%;
  height: 2px;
  background: var(--accent);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle.active .hamburger-line:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.nav-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active .hamburger-line:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* ---------- HERO SECTION ---------- */
.hero-section {
  background: var(--grad-hero);
  min-height: 88vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 80px 24px;
}

#particles-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(246, 201, 14, 0.15);
  border: 1px solid rgba(246, 201, 14, 0.4);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  letter-spacing: 0.05em;
  animation: fadeInDown 0.8s ease forwards;
}

.hero-heading {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 20px;
  animation: fadeInUp 0.9s ease 0.2s both;
}

.hero-highlight {
  background: var(--grad-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subheading {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255, 255, 255, 0.75);
  max-width: 640px;
  margin: 0 auto 36px;
  animation: fadeInUp 0.9s ease 0.4s both;
  font-family: var(--font-serif);
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
  animation: fadeInUp 0.9s ease 0.6s both;
}

.hero-stats {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.9s ease 0.8s both;
}

.hero-stat-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: rgba(255, 255, 255, 0.08) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  border-radius: var(--radius-md);
  backdrop-filter: blur(10px);
  min-width: 130px;
}

.hero-stat-card i {
  font-size: 1.6rem;
  color: var(--accent);
}

.hero-stat-card div {
  display: flex;
  flex-direction: column;
}

.hero-stat-card strong {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}

.hero-stat-card span {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.6);
}

/* Scroll Indicator */
.hero-scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  z-index: 1;
  animation: fadeIn 2s ease 1.5s both;
}

.scroll-arrow {
  animation: bounce 2s infinite;
  font-size: 1rem;
  color: var(--accent);
}

/* ---------- SEARCH RESULTS OVERLAY ---------- */
.search-results-overlay {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 900;
  padding: 20px 24px;
  background: rgba(5, 15, 60, 0.98);
  border-bottom: 2px solid var(--accent);
  max-height: 70vh;
  overflow-y: auto;
  animation: slideDown 0.3s ease;
}

.search-results-container {
  max-width: var(--container-max);
  margin: 0 auto;
}

.search-results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.search-results-header h3 {
  color: var(--accent);
  font-size: 1.1rem;
}

.close-search-btn {
  background: rgba(255,255,255,0.1);
  border: none;
  color: var(--white);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  transition: background var(--transition-fast);
}

.close-search-btn:hover {
  background: rgba(255,255,255,0.2);
}

.search-results-list {
  display: grid;
  gap: 12px;
}

.search-result-item {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  transition: background var(--transition-fast);
}

.search-result-item:hover {
  background: rgba(255,255,255,0.1);
}

.search-result-title {
  color: var(--white);
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.search-result-authors {
  color: rgba(255,255,255,0.6);
  font-size: 0.82rem;
  margin-bottom: 4px;
}

.search-result-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.search-result-domain {
  background: rgba(246, 201, 14, 0.15);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: var(--radius-full);
}

.search-result-doi {
  color: rgba(255,255,255,0.45);
  font-size: 0.75rem;
}

.search-no-results {
  color: rgba(255,255,255,0.5);
  text-align: center;
  padding: 24px 0;
}

/* ---------- ABOUT SECTION ---------- */
.about-section {
  background: var(--off-white);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.about-card {
  padding: 36px 32px;
  background: linear-gradient(135deg, rgba(255,255,255,0.98), rgba(240,244,255,0.9));
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad-accent);
}

.about-card-icon {
  width: 64px;
  height: 64px;
  background: var(--grad-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.6rem;
  color: var(--accent);
  box-shadow: var(--shadow-md);
}

.about-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}

.about-card p {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 0.95rem;
}

.objectives-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.objectives-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  padding: 8px 12px;
  background: rgba(10, 36, 99, 0.04);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.objectives-list li:hover {
  background: rgba(10, 36, 99, 0.08);
  transform: translateX(4px);
}

.objectives-list li i {
  color: var(--accent-dark);
  font-size: 0.9rem;
  flex-shrink: 0;
}

/* ---------- DOMAINS SECTION ---------- */
.domains-section {
  background: linear-gradient(180deg, #eef2ff 0%, #f0f4ff 100%);
}

.domain-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.domain-tab {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.9);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: var(--font-body);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
  text-align: left;
}

.domain-tab:hover {
  border-color: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.domain-tab.active {
  background: var(--grad-primary);
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(10, 36, 99, 0.35);
  transform: translateY(-3px);
}

.tab-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(10, 36, 99, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--primary);
  flex-shrink: 0;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.domain-tab.active .tab-icon {
  background: rgba(246, 201, 14, 0.2);
  color: var(--accent);
}

.tab-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tab-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.domain-tab.active .tab-name {
  color: var(--white);
}

.tab-count {
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.domain-tab.active .tab-count {
  color: var(--accent-light);
}

/* Domain Banner */
.domain-info-banner {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 32px;
  margin-bottom: 32px;
  background: var(--grad-primary) !important;
  border: 1px solid rgba(255,255,255,0.15) !important;
  animation: fadeIn 0.4s ease;
}

.domain-banner-icon {
  width: 60px;
  height: 60px;
  background: rgba(246, 201, 14, 0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--accent);
  flex-shrink: 0;
}

.domain-banner-text {
  flex: 1;
}

.domain-banner-text h3 {
  color: var(--white);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.domain-banner-text p {
  color: rgba(255,255,255,0.65);
  font-size: 0.9rem;
}

.domain-banner-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.domain-paper-count {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.domain-banner-stat span:last-child {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Papers Grid */
.papers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.paper-card {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(255,255,255,0.8);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  animation: fadeInUp 0.5s ease both;
}

.paper-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.paper-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--grad-primary);
  color: var(--accent);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 12px;
  flex-shrink: 0;
}

.paper-citation {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.paper-citation .paper-authors {
  color: var(--text-primary);
  font-weight: 400;
}

.paper-citation .paper-title {
  color: var(--primary);
  font-weight: 700;
  font-style: italic;
}

.paper-citation .paper-journal {
  color: var(--text-secondary);
}

.paper-doi {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--primary-light);
  font-weight: 500;
  padding: 5px 12px;
  background: rgba(10, 36, 99, 0.06);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast), color var(--transition-fast);
  word-break: break-all;
}

.paper-doi:hover {
  background: var(--primary);
  color: var(--accent);
}

/* ---------- FEATURED PAPERS CAROUSEL ---------- */
.featured-section {
  background: var(--grad-hero);
  overflow: hidden;
}

.featured-section .section-title {
  color: var(--white);
}

.featured-section .section-description {
  color: rgba(255,255,255,0.65);
}

.carousel-wrapper {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.carousel-track-container {
  flex: 1;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.carousel-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
  min-width: 100%;
  padding: 0 4px;
}

.carousel-card {
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
}

.carousel-card::before {
  content: '\201C';
  position: absolute;
  top: -20px;
  left: 32px;
  font-size: 10rem;
  font-family: var(--font-serif);
  color: rgba(246, 201, 14, 0.1);
  line-height: 1;
  pointer-events: none;
}

.carousel-domain-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(246, 201, 14, 0.15);
  border: 1px solid rgba(246, 201, 14, 0.3);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.carousel-paper-title {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.4;
  margin-bottom: 16px;
}

.carousel-paper-authors {
  font-size: 0.92rem;
  color: rgba(255,255,255,0.65);
  margin-bottom: 8px;
}

.carousel-paper-year {
  font-size: 0.85rem;
  color: var(--accent-light);
  font-weight: 600;
  margin-bottom: 20px;
}

.carousel-doi-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: var(--grad-accent);
  color: var(--primary-dark);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  transition: all var(--transition-base);
}

.carousel-doi-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  color: var(--primary-dark);
}

.carousel-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--white);
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.carousel-btn:hover {
  background: var(--accent);
  color: var(--primary-dark);
  border-color: var(--accent);
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  padding: 0;
}

.carousel-dot.active {
  background: var(--accent);
  transform: scale(1.3);
  width: 28px;
  border-radius: var(--radius-full);
}

/* ---------- STATISTICS SECTION ---------- */
.stats-section {
  background: linear-gradient(180deg, #f0f4ff 0%, #e8eeff 100%);
}

.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}

.chart-card {
  padding: 28px;
  background: rgba(255, 255, 255, 0.95) !important;
}

.chart-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.chart-title i {
  color: var(--accent-dark);
}

.chart-container {
  position: relative;
  height: 260px;
}

/* ---------- RESOURCES SECTION ---------- */
.resources-section {
  background: var(--off-white);
}

.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.resource-card {
  padding: 32px 28px;
  background: rgba(255, 255, 255, 0.95) !important;
  display: flex;
  flex-direction: column;
}

.resource-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--white);
  margin-bottom: 20px;
  box-shadow: var(--shadow-md);
}

.resource-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}

.resource-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

/* ---------- CONTACT SECTION ---------- */
.contact-section {
  background: linear-gradient(180deg, #eef2ff 0%, #e8eeff 100%);
}

.contact-grid {
  display: flex;
  justify-content: center;
}

.contact-info {
  padding: 36px 32px;
  background: var(--grad-primary) !important;
  border: 1px solid rgba(255,255,255,0.15) !important;
  max-width: 600px;
  width: 100%;
}

.contact-info h3 {
  color: var(--accent);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  align-items: flex-start;
}

.contact-item-icon {
  width: 44px;
  height: 44px;
  background: rgba(246, 201, 14, 0.15);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--accent);
  flex-shrink: 0;
}

.contact-item-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-item-text strong {
  color: var(--white);
  font-size: 0.88rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.contact-item-text span,
.contact-item-text address,
.contact-item-text a {
  color: rgba(255,255,255,0.65);
  font-size: 0.9rem;
  line-height: 1.6;
}

.contact-item-text a:hover {
  color: var(--accent);
}

/* Contact Form */
.contact-form-wrapper {
  padding: 36px 32px;
  background: rgba(255, 255, 255, 0.96) !important;
}

.contact-form-wrapper h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
  letter-spacing: 0.03em;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid rgba(10, 36, 99, 0.12);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--text-primary);
  background: rgba(255,255,255,0.8);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
  resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10, 36, 99, 0.08);
}

.form-error {
  display: block;
  font-size: 0.78rem;
  color: #dc2626;
  margin-top: 4px;
  min-height: 16px;
}

.btn-submit {
  width: 100%;
  justify-content: center;
  padding: 14px;
  font-size: 1rem;
  margin-top: 8px;
}

.form-success {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: #16a34a;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-top: 16px;
  font-size: 0.9rem;
  font-weight: 500;
}

/* ---------- FOOTER ---------- */
.site-footer {
  background: var(--primary-dark);
  border-top: 2px solid var(--accent);
}

.footer-main {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 60px 24px 40px;
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr 1.5fr;
  gap: 40px;
}

.footer-brand {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.footer-logo {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(246, 201, 14, 0.3);
}

.footer-brand-text h3 {
  color: var(--accent);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.footer-brand-text p {
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
}

.footer-tagline {
  margin-top: 8px !important;
  color: rgba(255,255,255,0.6) !important;
  font-style: italic;
  font-size: 0.9rem !important;
}

.footer-links h4,
.footer-domains h4,
.footer-contact h4 {
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.footer-links ul,
.footer-domains ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links ul li a,
.footer-domains ul li a {
  color: rgba(255,255,255,0.55);
  font-size: 0.87rem;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer-links ul li a:hover,
.footer-domains ul li a:hover {
  color: var(--accent);
  transform: translateX(4px);
}

.footer-contact p {
  color: rgba(255,255,255,0.55);
  font-size: 0.87rem;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.social-icons {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.social-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  transition: all var(--transition-base);
}

.social-icon:hover {
  background: var(--accent);
  color: var(--primary-dark);
  border-color: var(--accent);
  transform: translateY(-3px);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  max-width: var(--container-max);
  margin: 0 auto;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
}

/* ---------- BACK TO TOP ---------- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--grad-accent);
  color: var(--primary-dark);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(246, 201, 14, 0.4);
  transition: all var(--transition-base);
  opacity: 0;
  transform: translateY(20px);
  z-index: 999;
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(246, 201, 14, 0.6);
}

/* ---------- ANIMATIONS ---------- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Scroll-reveal animation target */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- RESPONSIVE DESIGN ---------- */

/* Tablet: ≤ 1024px */
@media (max-width: 1024px) {
  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

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

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

  .nav-search input {
    width: 130px;
  }
}

/* Tablet: ≤ 768px */
@media (max-width: 768px) {
  :root {
    --section-padding: 70px 0;
  }

  /* Header */
  .header-logos {
    flex-direction: row;
    gap: 10px;
  }

  .header-logo-img {
    height: 65px;
  }

  .center-logo {
    height: 90px;
  }

  /* Nav */
  .nav-toggle {
    display: flex;
  }

  .nav-container {
    flex-wrap: wrap;
    height: auto;
    padding: 14px 20px;
  }

  .nav-brand {
    flex: 1;
  }

  .nav-menu {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 4px;
    padding: 12px 0;
    order: 3;
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-link {
    padding: 12px 16px;
    width: 100%;
    border-radius: var(--radius-sm);
  }

  .nav-search {
    order: 2;
    width: auto;
  }

  .nav-search input {
    width: 100px;
  }

  /* Domains */
  .domain-tabs {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

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

  /* Carousel */
  .carousel-card {
    padding: 28px 24px;
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer-main {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  /* Charts */
  .charts-grid {
    grid-template-columns: 1fr;
  }
}

/* Mobile: ≤ 480px */
@media (max-width: 480px) {
  .header-logos {
    gap: 8px;
  }

  .header-logo-img {
    height: 52px;
  }

  .center-logo {
    height: 72px;
  }

  .domain-tabs {
    grid-template-columns: 1fr;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-stats {
    flex-direction: column;
    align-items: center;
  }

  .counters-row {
    gap: 10px;
  }

  .counter-item {
    min-width: 100px;
    padding: 12px 16px;
  }

  .domain-info-banner {
    flex-direction: column;
    text-align: center;
    padding: 20px;
  }

  .carousel-card::before {
    font-size: 6rem;
  }

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

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

/* High-contrast / accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- DYNAMIC DOMAIN SELECTOR & FILTER STYLES ---------- */
.domain-filter-controls {
  max-width: 700px;
  margin: 0 auto 28px;
}

.domain-search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--white);
  border: 2px solid rgba(10, 36, 99, 0.15);
  border-radius: var(--radius-full);
  padding: 14px 28px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.domain-search-wrapper:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(246, 201, 14, 0.2), var(--shadow-md);
}

.domain-search-icon {
  color: var(--primary-light);
  font-size: 1.25rem;
  margin-right: 14px;
}

.domain-search-wrapper input {
  width: 100%;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--text-primary);
  font-weight: 500;
}

.domain-search-wrapper input::placeholder {
  color: var(--text-muted);
}

.domain-pills-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
  max-height: none; /* Removed scrolling limit so pills can expand freely */
  overflow-y: visible;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(10px);
  border: 2px solid rgba(10, 36, 99, 0.08);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.02), var(--shadow-md);
}

/* Category Filter Bar Styles */
.category-filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
  width: 100%;
}

.category-filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid rgba(10, 36, 99, 0.1);
  background: var(--white);
  color: var(--primary);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.category-filter-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.category-filter-btn i {
  font-size: 0.95rem;
}

/* Category Filter Buttons Dynamic Colors */
.category-filter-btn[data-category="all"]:hover,
.category-filter-btn[data-category="all"].active {
  border-color: var(--accent-dark);
  color: var(--primary-dark);
  background: rgba(246, 201, 14, 0.15);
}
.category-filter-btn[data-category="all"].active {
  background: var(--grad-accent);
  box-shadow: 0 4px 12px rgba(246, 201, 14, 0.3);
}

.category-filter-btn[data-category="healthcare"]:hover,
.category-filter-btn[data-category="healthcare"].active {
  border-color: #ef4444;
  color: #ef4444;
  background: rgba(239, 68, 68, 0.06);
}
.category-filter-btn[data-category="healthcare"].active {
  background: #ef4444;
  color: var(--white);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.category-filter-btn[data-category="ml"]:hover,
.category-filter-btn[data-category="ml"].active {
  border-color: #8b5cf6;
  color: #8b5cf6;
  background: rgba(139, 92, 246, 0.06);
}
.category-filter-btn[data-category="ml"].active {
  background: #8b5cf6;
  color: var(--white);
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.category-filter-btn[data-category="image"]:hover,
.category-filter-btn[data-category="image"].active {
  border-color: #06b6d4;
  color: #06b6d4;
  background: rgba(6, 182, 212, 0.06);
}
.category-filter-btn[data-category="image"].active {
  background: #06b6d4;
  color: var(--white);
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

.category-filter-btn[data-category="remote"]:hover,
.category-filter-btn[data-category="remote"].active {
  border-color: #f59e0b;
  color: #f59e0b;
  background: rgba(245, 158, 11, 0.06);
}
.category-filter-btn[data-category="remote"].active {
  background: #f59e0b;
  color: var(--white);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.category-filter-btn[data-category="iot"]:hover,
.category-filter-btn[data-category="iot"].active {
  border-color: #10b981;
  color: #10b981;
  background: rgba(16, 185, 129, 0.06);
}
.category-filter-btn[data-category="iot"].active {
  background: #10b981;
  color: var(--white);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.category-filter-btn[data-category="ds"]:hover,
.category-filter-btn[data-category="ds"].active {
  border-color: #3b82f6;
  color: #3b82f6;
  background: rgba(59, 130, 246, 0.06);
}
.category-filter-btn[data-category="ds"].active {
  background: #3b82f6;
  color: var(--white);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Domain Pill Styles */
.domain-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--white);
  border: 2px solid rgba(10, 36, 99, 0.06);
  border-radius: var(--radius-full);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--primary);
  transition: all var(--transition-fast);
  box-shadow: 0 2px 5px rgba(10, 36, 99, 0.04);
  user-select: none;
}

.domain-pill:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(10, 36, 99, 0.08);
}

.pill-icon {
  font-size: 1rem;
  transition: color var(--transition-fast);
}

.pill-count {
  font-size: 0.78rem;
  background: rgba(10, 36, 99, 0.08);
  color: var(--primary-light);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 700;
  transition: all var(--transition-fast);
}

/* Active Pill Styles overrides for category gradients */
.domain-pill.active {
  color: var(--white);
  transform: translateY(-2px);
}

.domain-pill.active .pill-icon {
  color: var(--white) !important;
}

.domain-pill.active .pill-count {
  background: rgba(255, 255, 255, 0.25);
  color: var(--white);
}

/* Category-specific styling for pills */
/* 0. All Categories */
.domain-pill.cat-all {
  border-color: rgba(246, 201, 14, 0.2);
  background: rgba(246, 201, 14, 0.03);
}
.domain-pill.cat-all:hover {
  border-color: var(--accent-dark);
  background: rgba(246, 201, 14, 0.08);
}
.domain-pill.cat-all .pill-icon {
  color: var(--accent-dark);
}
.domain-pill.cat-all.active {
  background: var(--grad-accent);
  border-color: var(--accent-dark);
  color: var(--primary-dark) !important;
  box-shadow: 0 6px 16px rgba(246, 201, 14, 0.3);
}
.domain-pill.cat-all.active .pill-icon {
  color: var(--primary-dark) !important;
}
.domain-pill.cat-all.active .pill-count {
  background: rgba(10, 36, 99, 0.15);
  color: var(--primary-dark);
}

/* 1. Healthcare */
.domain-pill.cat-healthcare {
  border-color: rgba(239, 68, 68, 0.12);
  background: rgba(239, 68, 68, 0.02);
}
.domain-pill.cat-healthcare:hover {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.05);
}
.domain-pill.cat-healthcare .pill-icon {
  color: #ef4444;
}
.domain-pill.cat-healthcare.active {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  border-color: #ef4444;
  box-shadow: 0 6px 16px rgba(239, 68, 68, 0.25);
}

/* 2. Machine Learning */
.domain-pill.cat-ml {
  border-color: rgba(139, 92, 246, 0.12);
  background: rgba(139, 92, 246, 0.02);
}
.domain-pill.cat-ml:hover {
  border-color: #8b5cf6;
  background: rgba(139, 92, 246, 0.05);
}
.domain-pill.cat-ml .pill-icon {
  color: #8b5cf6;
}
.domain-pill.cat-ml.active {
  background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
  border-color: #8b5cf6;
  box-shadow: 0 6px 16px rgba(139, 92, 246, 0.25);
}

/* 3. Image Processing */
.domain-pill.cat-image {
  border-color: rgba(6, 182, 212, 0.12);
  background: rgba(6, 182, 212, 0.02);
}
.domain-pill.cat-image:hover {
  border-color: #06b6d4;
  background: rgba(6, 182, 212, 0.05);
}
.domain-pill.cat-image .pill-icon {
  color: #06b6d4;
}
.domain-pill.cat-image.active {
  background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
  border-color: #06b6d4;
  box-shadow: 0 6px 16px rgba(6, 182, 212, 0.25);
}

/* 4. Remote Sensing */
.domain-pill.cat-remote {
  border-color: rgba(245, 158, 11, 0.12);
  background: rgba(245, 158, 11, 0.02);
}
.domain-pill.cat-remote:hover {
  border-color: #f59e0b;
  background: rgba(245, 158, 11, 0.05);
}
.domain-pill.cat-remote .pill-icon {
  color: #f59e0b;
}
.domain-pill.cat-remote.active {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  border-color: #f59e0b;
  box-shadow: 0 6px 16px rgba(245, 158, 11, 0.25);
}

/* 5. IoT & Networking */
.domain-pill.cat-iot {
  border-color: rgba(16, 185, 129, 0.12);
  background: rgba(16, 185, 129, 0.02);
}
.domain-pill.cat-iot:hover {
  border-color: #10b981;
  background: rgba(16, 185, 129, 0.05);
}
.domain-pill.cat-iot .pill-icon {
  color: #10b981;
}
.domain-pill.cat-iot.active {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  border-color: #10b981;
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.25);
}

/* 6. Data Science */
.domain-pill.cat-ds {
  border-color: rgba(59, 130, 246, 0.12);
  background: rgba(59, 130, 246, 0.02);
}
.domain-pill.cat-ds:hover {
  border-color: #3b82f6;
  background: rgba(59, 130, 246, 0.05);
}
.domain-pill.cat-ds .pill-icon {
  color: #3b82f6;
}
.domain-pill.cat-ds.active {
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  border-color: #3b82f6;
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.25);
}

/* Year Tabs */
.year-tabs-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin-bottom: 36px;
  background: var(--white);
  padding: 20px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 2px solid rgba(10, 36, 99, 0.04);
}

.year-filter-label {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.year-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.year-tab {
  padding: 8px 24px;
  background: rgba(10, 36, 99, 0.04);
  border: 1.5px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.year-tab:hover {
  background: rgba(10, 36, 99, 0.08);
  color: var(--primary);
  transform: translateY(-1px);
}

.year-tab.active {
  background: var(--grad-accent);
  color: var(--primary-dark);
  border-color: var(--accent-dark);
  box-shadow: 0 4px 12px rgba(246, 201, 14, 0.4);
  transform: translateY(-1px);
}

/* Domain Banner and Papers Bottom Navigation Action Styles */
.domain-banner-right {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
}

.papers-action-row {
  display: flex;
  justify-content: center;
  margin-top: 36px;
  margin-bottom: 16px;
  width: 100%;
}

.back-to-domains-btn {
  white-space: nowrap;
  box-shadow: var(--shadow-sm);
}

.back-to-domains-btn:hover {
  border-color: var(--accent) !important;
  color: var(--accent) !important;
}

@media (max-width: 768px) {
  .domain-banner-right {
    flex-direction: column;
    gap: 12px;
    align-items: center;
    width: 100%;
  }
  .back-to-domains-btn {
    width: 100%;
    justify-content: center;
  }
}

/* ============================================================
   NEW STYLES – TOP CITED, COMMITTEE & TRAFFIC COUNTER
   ============================================================ */

/* ---------- TOP CITED PAPERS SECTION ---------- */
.top-cited-controls {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 30px;
  background: var(--white);
  padding: 16px 24px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(10, 36, 99, 0.04);
}

.top-cited-limit-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.top-cited-limit-wrapper label {
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

.top-cited-select {
  padding: 8px 16px;
  background: rgba(10, 36, 99, 0.04);
  border: 1.5px solid transparent;
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  outline: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.top-cited-select:focus,
.top-cited-select:hover {
  background: rgba(10, 36, 99, 0.08);
  border-color: var(--accent);
}

.top-cited-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.citations-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(246, 201, 14, 0.12);
  color: var(--accent-dark);
  font-weight: 800;
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  border: 1px solid rgba(246, 201, 14, 0.25);
  box-shadow: 0 2px 4px rgba(246, 201, 14, 0.05);
}

/* ---------- COMMITTEE & ACKNOWLEDGMENTS ---------- */
.principal-acknowledgment {
  display: flex;
  gap: 24px;
  align-items: center;
  background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(246, 201, 14, 0.04));
  border-left: 5px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-bottom: 50px;
  box-shadow: var(--shadow-md);
}

.ack-icon {
  font-size: 3rem;
  color: var(--accent-dark);
  flex-shrink: 0;
  text-shadow: 0 4px 10px rgba(246, 201, 14, 0.2);
}

.ack-content h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--primary);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

.ack-quote {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 10px;
  font-style: italic;
}

.ack-author {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.committee-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.committee-card {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 24px;
  background: var(--white);
  border: 1px solid rgba(10, 36, 99, 0.05);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.committee-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.developer-card {
  border: 2.5px solid var(--accent);
  box-shadow: var(--shadow-glow);
  background: linear-gradient(135deg, var(--white), rgba(246, 201, 14, 0.03));
}

.developer-card:hover {
  box-shadow: 0 10px 30px rgba(246, 201, 14, 0.25);
}

.member-avatar {
  width: 50px;
  height: 50px;
  background: rgba(10, 36, 99, 0.06);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
}

.developer-card .member-avatar {
  background: rgba(246, 201, 14, 0.15);
  color: var(--accent-dark);
}

.member-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.member-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.3;
}

.member-designation {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.member-role {
  display: inline-flex;
  align-self: flex-start;
  align-items: center;
  gap: 4px;
  background: rgba(10, 36, 99, 0.05);
  color: var(--primary-light);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.member-role.convener {
  background: var(--grad-accent);
  color: var(--primary-dark);
  box-shadow: 0 2px 8px rgba(246, 201, 14, 0.25);
}

/* ---------- VISITOR COUNTER ---------- */
.visitor-counter-section {
  padding: 40px 0;
  background: var(--grad-hero);
  position: relative;
  overflow: hidden;
  border-top: 2px solid var(--accent);
}

.visitor-counter-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(246, 201, 14, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.counter-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 30px;
  background: rgba(255, 255, 255, 0.06) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  box-shadow: var(--shadow-md);
  max-width: 480px;
  margin: 0 auto;
  text-align: center;
}

.counter-title {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.counter-title i {
  color: var(--accent);
}

.visitor-digits {
  display: flex;
  gap: 6px;
}

.digit-card {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 48px;
  background: #061537;
  color: var(--accent);
  font-family: 'Poppins', monospace;
  font-size: 1.8rem;
  font-weight: 800;
  border-radius: var(--radius-sm);
  box-shadow: inset 0 2px 8px rgba(0,0,0,0.6), 0 0 10px rgba(246, 201, 14, 0.15);
  border: 1px solid rgba(246, 201, 14, 0.2);
  text-shadow: 0 0 5px rgba(246, 201, 14, 0.4);
}

.counter-subtitle {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.75rem;
  font-style: italic;
}

@media (max-width: 768px) {
  .principal-acknowledgment {
    flex-direction: column;
    text-align: center;
    padding: 28px;
  }
}

.bug-link {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition-fast);
}

.bug-link:hover {
  color: var(--white);
  text-decoration: underline;
}

/* ---------- CUSTOM HIGHLIGHTS & CLICKABLE COUNTERS ---------- */
.counter-item, .hero-stat-card {
  cursor: pointer;
  transition: transform var(--transition-base), background var(--transition-base), box-shadow var(--transition-base) !important;
}
.counter-item:hover, .hero-stat-card:hover {
  transform: translateY(-5px) scale(1.02) !important;
  box-shadow: 0 10px 30px rgba(246, 201, 14, 0.25) !important;
  border-color: var(--accent) !important;
}

/* Nav Link Highlight */
.nav-link.nav-highlight {
  border: 1px solid var(--accent);
  background: rgba(246, 201, 14, 0.15);
  font-weight: 600;
  box-shadow: 0 0 10px rgba(246, 201, 14, 0.2);
}
.nav-link.nav-highlight:hover {
  background: rgba(246, 201, 14, 0.25);
  box-shadow: 0 0 15px rgba(246, 201, 14, 0.4);
}

.badge-hot {
  background: #ff4757;
  color: #fff;
  font-size: 0.65rem;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  margin-left: 4px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: inline-block;
  vertical-align: middle;
  animation: pulse-badge 1.8s infinite;
}

@keyframes pulse-badge {
  0% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(255, 71, 87, 0.6);
  }
  70% {
    transform: scale(1.05);
    box-shadow: 0 0 0 6px rgba(255, 71, 87, 0);
  }
  100% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(255, 71, 87, 0);
  }
}

/* Top Cited Section Highlight */
#top-cited.top-cited-section {
  position: relative;
  background: linear-gradient(180deg, #fffcf0 0%, #fffbf0 100%) !important;
  border-top: 4px solid var(--accent);
  border-bottom: 4px solid var(--accent);
  box-shadow: inset 0 0 40px rgba(246, 201, 14, 0.06);
}
#top-cited .section-badge {
  background: var(--primary);
  color: var(--accent);
  box-shadow: 0 4px 15px rgba(10, 36, 99, 0.2);
}

/* ---------- CITATION GENERATOR STYLES ---------- */
.card-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
  gap: 12px;
  flex-wrap: wrap;
}

.citation-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(10, 36, 99, 0.06);
  border: 1px solid rgba(10, 36, 99, 0.1);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.citation-btn:hover {
  background: var(--primary);
  color: var(--accent);
  border-color: var(--primary);
}

.citation-drawer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  background: #f8fafc;
  border-radius: var(--radius-md);
  margin-top: 0;
  border: 1px solid transparent;
}

.citation-drawer.open {
  max-height: 350px;
  margin-top: 16px;
  padding: 16px;
  border: 1px solid rgba(10, 36, 99, 0.1);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.04);
}

.citation-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(0,0,0,0.08);
  padding-bottom: 8px;
}

.citation-tab-btn {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.citation-tab-btn:hover {
  background: rgba(0,0,0,0.04);
  color: var(--primary);
}

.citation-tab-btn.active {
  background: var(--primary);
  color: var(--white);
}

.citation-content-area {
  position: relative;
}

.citation-text-box {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--text-primary);
  line-height: 1.6;
  background: var(--white);
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: var(--radius-sm);
  padding: 14px 44px 14px 14px;
  min-height: 70px;
  word-break: break-word;
}

.btn-copy-citation {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(10, 36, 99, 0.05);
  border: none;
  color: var(--primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.btn-copy-citation:hover {
  background: var(--primary);
  color: var(--accent);
}

.btn-copy-citation.copied {
  background: #22c55e !important;
  color: var(--white) !important;
  transform: scale(1.1);
}

/* ---------- TOP 10 HIGHLIGHT STYLES ---------- */
.top-cited-grid .paper-card.top-10-highlight {
  border-left: 5px solid #d4a800 !important;
  border-top: 1px solid rgba(246, 201, 14, 0.4) !important;
  border-right: 1px solid rgba(246, 201, 14, 0.4) !important;
  border-bottom: 1px solid rgba(246, 201, 14, 0.4) !important;
  background: linear-gradient(135deg, #fffdf5 0%, #ffffff 100%) !important;
  box-shadow: 0 10px 30px rgba(246, 201, 14, 0.22) !important;
  position: relative;
  overflow: hidden;
}

.top-cited-grid .paper-card.top-10-highlight::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, transparent 50%, rgba(246, 201, 14, 0.1) 50%);
  pointer-events: none;
}

.top-rank-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  background: var(--grad-accent);
  color: var(--primary-dark);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  box-shadow: 0 2px 8px rgba(246, 201, 14, 0.3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  z-index: 10;
}

@media (min-width: 992px) {
  .charts-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}

/* ---------- SEARCH COPING & CITE CUSTOMIZATIONS ---------- */
.search-result-item {
  display: flex !important;
  justify-content: space-between !important;
  align-items: center !important;
  gap: 20px !important;
  background: rgba(255, 255, 255, 0.06) !important;
  border: 1px solid rgba(255, 255, 255, 0.1) !important;
  border-radius: var(--radius-md) !important;
  padding: 16px 20px !important;
  cursor: pointer !important;
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast) !important;
}

.search-result-item:hover {
  background: rgba(255, 255, 255, 0.1) !important;
  border-color: rgba(246, 201, 14, 0.4) !important;
  transform: translateX(4px) !important;
}

.search-result-content {
  flex: 1 !important;
  min-width: 0 !important;
}

.search-copy-btn {
  background: var(--grad-accent) !important;
  color: var(--primary-dark) !important;
  border: none !important;
  border-radius: var(--radius-full) !important;
  padding: 8px 16px !important;
  font-size: 0.8rem !important;
  font-weight: 600 !important;
  display: flex !important;
  align-items: center !important;
  gap: 6px !important;
  cursor: pointer !important;
  transition: all var(--transition-fast) !important;
  white-space: nowrap !important;
  box-shadow: 0 2px 8px rgba(246, 201, 14, 0.2) !important;
  flex-shrink: 0 !important;
}

.search-copy-btn:hover {
  transform: scale(1.05) !important;
  box-shadow: 0 4px 12px rgba(246, 201, 14, 0.4) !important;
}

.search-copy-btn.copied {
  background: #10b981 !important;
  color: white !important;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4) !important;
}

/* Card flash highlight animation */
@keyframes searchFlash {
  0% {
    background-color: var(--accent-light);
    box-shadow: 0 0 0 4px rgba(246, 201, 14, 0.6);
  }
  30% {
    background-color: rgba(246, 201, 14, 0.25);
    box-shadow: 0 0 0 6px rgba(246, 201, 14, 0.4);
  }
  100% {
    background-color: rgba(255, 255, 255, 0.96);
    box-shadow: none;
  }
}

.search-flash-highlight {
  animation: searchFlash 2.5s ease-out !important;
  border-color: var(--accent) !important;
}

/* ---------- RESEARCH ANALYTICS SECTION ---------- */
.analytics-section {
  background: var(--grad-section-alt);
  position: relative;
}

.analytics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  margin-top: 40px;
}

@media (max-width: 1024px) {
  .analytics-grid {
    grid-template-columns: 1fr;
  }
}

.analytics-card {
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(10, 36, 99, 0.06);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.analytics-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(246, 201, 14, 0.3);
}

.chart-header {
  border-bottom: 1px solid rgba(10, 36, 99, 0.06);
  padding-bottom: 14px;
}

.chart-header h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.chart-header h3 i {
  color: var(--accent-dark);
}

.chart-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.chart-container {
  position: relative;
  width: 100%;
  height: 350px;
}

/* ---------- SUBDOMAIN TABS ---------- */
.subdomain-tabs-wrapper {
  background: var(--white);
  padding: 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(10, 36, 99, 0.04);
  margin-top: 24px;
}

.subdomain-filter-label {
  font-weight: 700;
  color: var(--primary);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.subdomain-filter-label i {
  color: var(--accent-dark);
}

.subdomain-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.subdomain-tab {
  padding: 6px 14px;
  background: rgba(10, 36, 99, 0.04);
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.subdomain-tab:hover {
  background: rgba(10, 36, 99, 0.08);
  color: var(--primary);
}

.subdomain-tab.active {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 10px rgba(10, 36, 99, 0.2);
}