/* ==========================================================================
   RESEARCH PORTFOLIO - FUTURISTIC DARK GLASSMORPHISM STYLESHEET
   ========================================================================== */

/* Importing Premium Modern Fonts */
@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&family=Inter:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700;800&display=swap');

/* CSS Variables for Clean Design Token System */
:root {
  --bg-dark: #030307;
  --bg-canvas: #000000;
  --bg-card: rgba(13, 16, 27, 0.65);
  --bg-card-hover: rgba(20, 25, 45, 0.85);
  --bg-header: rgba(5, 6, 12, 0.75);
  --bg-badge: rgba(0, 242, 254, 0.1);
  --bg-badge-purple: rgba(138, 43, 226, 0.12);
  
  /* Harmonious Cyber Accents */
  --cyan: #00f2fe;
  --blue: #00c6ff;
  --purple: #8a2be2;
  --magenta: #f857a6;
  --success: #00e676;
  
  /* Gradients */
  --primary-gradient: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  --purple-gradient: linear-gradient(135deg, #9b51e0 0%, #8a2be2 100%);
  --accent-gradient: linear-gradient(90deg, #00f2fe 0%, #8a2be2 100%);
  --bg-gradient: radial-gradient(circle at 50% 50%, #0c0d16 0%, #030307 100%);
  --border-glow: rgba(0, 242, 254, 0.15);
  --border-glow-purple: rgba(138, 43, 226, 0.2);
  
  /* Borders */
  --border-glass: 1px solid rgba(255, 255, 255, 0.05);
  --border-glass-bright: 1px solid rgba(255, 255, 255, 0.12);
  
  /* Text */
  --text-primary: #f3f4f6;
  --text-secondary: #a3a8b4;
  --text-muted: #626875;
  
  /* Fonts */
  --font-title: 'Outfit', sans-serif;
  --font-main: 'Inter', sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  /* Durations */
  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-fast: all 0.15s ease;
}

/* ==========================================================================
   Base Reset & Body
   ========================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-dark);
  background-image: var(--bg-gradient);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* Interactive Network Canvas Background */
#canvas-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

/* Clean Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}

/* ==========================================================================
   Global Layout Container & Header
   ========================================================================== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: var(--border-glass);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 1.6rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}

.logo i {
  -webkit-text-fill-color: initial;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: 1.8rem;
}

.logo-sub {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0px;
  border-left: 1px solid rgba(255, 255, 255, 0.15);
  padding-left: 0.75rem;
  margin-left: 0.25rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition-fast);
  padding: 0.5rem 0.25rem;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: var(--transition-smooth);
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

/* ==========================================================================
   Hero Landing Section
   ========================================================================== */
.hero {
  padding: 6rem 0 3rem;
  text-align: center;
}

.hero-subtitle {
  font-family: var(--font-mono);
  color: var(--cyan);
  font-size: 0.95rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-subtitle::before,
.hero-subtitle::after {
  content: '';
  display: inline-block;
  width: 15px;
  height: 1px;
  background: var(--cyan);
}

.hero-title {
  font-family: var(--font-title);
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  letter-spacing: -1.5px;
}

.hero-title span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  max-width: 750px;
  margin: 0 auto 3rem;
  color: var(--text-secondary);
  font-size: 1.15rem;
  font-weight: 300;
}

/* ==========================================================================
   Interactive Lab Dashboard
   ========================================================================== */
.dashboard {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 2rem;
  margin-bottom: 4rem;
}

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

/* Glassmorphism Card Style */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: var(--border-glass);
  border-radius: 20px;
  padding: 2.25rem;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.05), transparent);
  transition: var(--transition-smooth);
}

.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.08);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

/* Dashboard Statistics Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.stat-item {
  background: rgba(255, 255, 255, 0.02);
  border: var(--border-glass);
  border-radius: 16px;
  padding: 1.5rem;
  text-align: center;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}

.stat-item:hover {
  background: rgba(255, 255, 255, 0.04);
}

.stat-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 10%;
  width: 80%;
  height: 2px;
  background: transparent;
  transition: var(--transition-smooth);
}

.stat-item.cyan-glow:hover {
  border-color: rgba(0, 242, 254, 0.3);
}
.stat-item.cyan-glow:hover::after {
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}

.stat-item.purple-glow:hover {
  border-color: rgba(138, 43, 226, 0.4);
}
.stat-item.purple-glow:hover::after {
  background: var(--purple);
  box-shadow: 0 0 10px var(--purple);
}

.stat-num {
  font-family: var(--font-title);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 0.5rem;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-item.purple-glow .stat-num {
  background: var(--purple-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Dashboard Research Fields/Charts Card */
.dashboard-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.card-title {
  font-family: var(--font-title);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.card-title i {
  color: var(--cyan);
  font-size: 1.4rem;
}

.trend-chart-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.chart-bar-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.chart-year {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  width: 45px;
  color: var(--text-secondary);
}

.chart-bar-bg {
  flex-grow: 1;
  height: 12px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 6px;
  overflow: hidden;
  border: var(--border-glass);
}

.chart-bar-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 6px;
  width: 0%; /* Dynamic fill via JavaScript */
  transition: width 1.2s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
}

.chart-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.15) 50%, rgba(255,255,255,0) 100%);
  animation: shine-bar 2.5s infinite linear;
}

@keyframes shine-bar {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.chart-val {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  width: 25px;
  text-align: right;
  font-weight: 500;
  color: var(--cyan);
}

/* Research Highlights / Top Fields */
.research-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.topic-tag {
  background: rgba(255, 255, 255, 0.02);
  border: var(--border-glass);
  border-radius: 12px;
  padding: 0.65rem 1rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-smooth);
}

.topic-tag i {
  color: var(--cyan);
}

.topic-tag:hover {
  background: rgba(0, 242, 254, 0.06);
  border-color: rgba(0, 242, 254, 0.25);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* ==========================================================================
   Filter, Sort & View Controls
   ========================================================================== */
.controls-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2rem;
  background: rgba(13, 16, 27, 0.45);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: var(--border-glass);
  border-radius: 16px;
  padding: 1.5rem;
}

/* Search Bar styling */
.search-box {
  position: relative;
  width: 100%;
}

.search-box i {
  position: absolute;
  left: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1.2rem;
  transition: var(--transition-fast);
}

.search-input {
  width: 100%;
  background: rgba(255, 255, 255, 0.02);
  border: var(--border-glass);
  border-radius: 12px;
  padding: 1.1rem 1.25rem 1.1rem 3.25rem;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 1rem;
  transition: var(--transition-smooth);
}

.search-input:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--cyan);
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.15);
}

.search-input:focus + i {
  color: var(--cyan);
}

/* Control filters & options row */
.filter-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

/* Filter tabs: category switcher */
.filter-tabs {
  display: flex;
  background: rgba(0, 0, 0, 0.25);
  padding: 0.35rem;
  border-radius: 12px;
  border: var(--border-glass);
  gap: 0.25rem;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.65rem 1.25rem;
  border-radius: 9px;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
  background: var(--accent-gradient);
  color: #030307;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(0, 242, 254, 0.2);
}

/* Select options & view switch */
.view-options {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.select-wrapper {
  position: relative;
}

.custom-select {
  appearance: none;
  background: rgba(255, 255, 255, 0.02);
  border: var(--border-glass);
  border-radius: 10px;
  padding: 0.65rem 2.25rem 0.65rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.custom-select:focus {
  outline: none;
  border-color: var(--cyan);
}

.select-wrapper::after {
  content: '\ea4c'; /* Remix Icon Arrow Down */
  font-family: 'remixicon' !important;
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  font-size: 0.85rem;
}

/* View Mode buttons */
.view-switcher {
  display: flex;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 10px;
  border: var(--border-glass);
  padding: 0.25rem;
}

.view-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.15rem;
  padding: 0.45rem 0.65rem;
  border-radius: 7px;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.view-btn:hover {
  color: var(--text-primary);
}

.view-btn.active {
  color: var(--cyan);
  background: rgba(255, 255, 255, 0.04);
}

/* Tag filter list (active filtering tags) */
.active-tags-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  border-top: 1px dashed rgba(255,255,255,0.05);
  padding-top: 1rem;
  display: none; /* Flex when tags active */
}

.active-tag-chip {
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.3);
  color: var(--cyan);
  border-radius: 8px;
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
}

.active-tag-chip i {
  cursor: pointer;
  font-weight: bold;
}

.active-tag-chip i:hover {
  color: var(--magenta);
}

/* ==========================================================================
   Main Publications Display
   ========================================================================== */
.publications-container {
  min-height: 400px;
  position: relative;
  margin-bottom: 6rem;
}

/* --- 1. Grid/Card View --- */
.pub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: 1.5rem;
}

@media (max-width: 640px) {
  .pub-grid {
    grid-template-columns: 1fr;
  }
}

.pub-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.pub-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.pub-badge {
  background: var(--bg-badge);
  border: 1px solid rgba(0, 242, 254, 0.2);
  color: var(--cyan);
  padding: 0.25rem 0.75rem;
  border-radius: 30px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.pub-badge.conference {
  background: var(--bg-badge-purple);
  border-color: rgba(138, 43, 226, 0.3);
  color: #c792ea;
}

.pub-badge.book {
  background: rgba(248, 87, 166, 0.1);
  border-color: rgba(248, 87, 166, 0.3);
  color: var(--magenta);
}

.pub-year-tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.03);
  border: var(--border-glass);
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
}

.pub-card-title {
  font-family: var(--font-title);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.pub-card:hover .pub-card-title {
  color: var(--cyan);
}

.pub-journal {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pub-journal i {
  color: var(--text-muted);
}

.pub-footer {
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 1rem;
}

.pub-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.01);
  border: var(--border-glass);
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  transition: var(--transition-fast);
  cursor: pointer;
}

.tag:hover {
  color: var(--cyan);
  border-color: rgba(0, 242, 254, 0.2);
  background: rgba(0, 242, 254, 0.02);
}

/* --- 2. Table/DataSheet View --- */
.pub-table-container {
  overflow-x: auto;
  border-radius: 16px;
  border: var(--border-glass);
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.pub-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.pub-table th {
  background: rgba(255, 255, 255, 0.02);
  font-family: var(--font-title);
  color: var(--text-primary);
  font-weight: 700;
  padding: 1.2rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.pub-table td {
  padding: 1.2rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  vertical-align: middle;
}

.pub-table tr {
  transition: var(--transition-fast);
}

.pub-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.table-title {
  color: var(--text-primary);
  font-weight: 500;
  transition: var(--transition-fast);
  cursor: pointer;
}

.pub-table tr:hover .table-title {
  color: var(--cyan);
}

.table-year, .table-date, .table-issn {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.table-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  text-transform: uppercase;
}

/* --- 3. Timeline View --- */
.timeline-container {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem 0;
}

.timeline-container::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--cyan), var(--purple), transparent);
  transform: translateX(-50%);
}

@media (max-width: 768px) {
  .timeline-container::before {
    left: 2rem;
  }
}

.timeline-year-group {
  margin-bottom: 4rem;
  position: relative;
}

.timeline-year-header {
  font-family: var(--font-title);
  font-size: 2.25rem;
  font-weight: 800;
  text-align: center;
  color: var(--text-primary);
  margin-bottom: 2.5rem;
  position: relative;
  z-index: 2;
}

.timeline-year-header span {
  background: rgba(13, 16, 27, 0.95);
  border: var(--border-glass-bright);
  padding: 0.5rem 2rem;
  border-radius: 30px;
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.1);
  display: inline-block;
}

@media (max-width: 768px) {
  .timeline-year-header {
    text-align: left;
    padding-left: 0.75rem;
  }
}

.timeline-item {
  display: flex;
  justify-content: flex-end;
  width: 50%;
  padding-right: 3rem;
  position: relative;
  margin-bottom: 2.5rem;
  box-sizing: border-box;
}

.timeline-item:nth-child(even) {
  align-self: flex-end;
  margin-left: 50%;
  justify-content: flex-start;
  padding-right: 0;
  padding-left: 3rem;
}

.timeline-item::after {
  content: '';
  position: absolute;
  right: -8px;
  top: 2.5rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-dark);
  border: 3px solid var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  z-index: 2;
  transition: var(--transition-smooth);
}

.timeline-item:nth-child(even)::after {
  left: -8px;
  right: auto;
  border-color: var(--purple);
  box-shadow: 0 0 10px var(--purple);
}

.timeline-item:hover::after {
  transform: scale(1.3);
  background: var(--text-primary);
}

@media (max-width: 768px) {
  .timeline-item {
    width: 100%;
    padding-left: 4rem;
    padding-right: 0;
    justify-content: flex-start;
    margin-bottom: 2rem;
  }
  .timeline-item:nth-child(even) {
    width: 100%;
    margin-left: 0;
    padding-left: 4rem;
    padding-right: 0;
  }
  .timeline-item::after {
    left: calc(2rem - 8px);
    right: auto;
    border-color: var(--cyan) !important;
  }
}

.timeline-content {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: var(--border-glass);
  border-radius: 16px;
  padding: 1.75rem;
  width: 100%;
  transition: var(--transition-smooth);
}

.timeline-content:hover {
  background: var(--bg-card-hover);
  border-color: rgba(0, 242, 254, 0.25);
  transform: translateY(-2px);
}

.timeline-item:nth-child(even) .timeline-content:hover {
  border-color: rgba(138, 43, 226, 0.35);
}

/* Timeline Layout wrapper */
.timeline-list {
  display: flex;
  flex-direction: column;
}

/* --- Empty state & Loader --- */
.no-results {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 5rem 2rem;
  text-align: center;
  background: var(--bg-card);
  border-radius: 20px;
  border: var(--border-glass);
}

.no-results i {
  font-size: 3rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.no-results h3 {
  font-family: var(--font-title);
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.no-results p {
  color: var(--text-muted);
}

/* ==========================================================================
   Details Dialog (Modal)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-smooth);
  padding: 1.5rem;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: rgba(13, 16, 27, 0.95);
  border: var(--border-glass-bright);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 242, 254, 0.1);
  border-radius: 24px;
  width: 100%;
  max-width: 700px;
  overflow: hidden;
  transform: scale(0.9);
  transition: var(--transition-smooth);
}

.modal-overlay.active .modal-card {
  transform: scale(1);
}

.modal-header {
  padding: 1.75rem 2.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title-type {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 0.25rem;
}

.modal-title-text {
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close-btn {
  background: rgba(255, 255, 255, 0.02);
  border: var(--border-glass);
  color: var(--text-secondary);
  font-size: 1.2rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.modal-close-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.modal-body {
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.modal-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.field-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.field-value {
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 500;
}

.field-value.highlight {
  color: var(--cyan);
  font-family: var(--font-mono);
}

.modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
  border-top: var(--border-glass);
  padding: 4rem 0 3rem;
  background: rgba(3, 3, 7, 0.9);
  text-align: center;
  position: relative;
  z-index: 10;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.footer-logo {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 1.3rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

.footer-links a {
  color: var(--text-secondary);
  font-size: 1.25rem;
  transition: var(--transition-fast);
}

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

/* ==========================================================================
   Professor Profile Section Styles
   ========================================================================== */
.profile-section {
  margin-top: 1rem;
  margin-bottom: 4rem;
}

.profile-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3rem;
  padding: 3rem;
  align-items: start;
}

@media (max-width: 900px) {
  .profile-card {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 2rem;
  }
}

.profile-img-container {
  width: 100%;
  aspect-ratio: 3 / 4;
  border-radius: 16px;
  overflow: hidden;
  border: var(--border-glass-bright);
  position: relative;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.profile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.profile-img-container:hover .profile-img {
  transform: scale(1.05);
}

.profile-img-fallback {
  display: none; /* Flex when img fails (via onerror in HTML) */
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #311042 100%);
  color: var(--text-primary);
  text-align: center;
  padding: 1.5rem;
}

.fallback-initial {
  font-family: var(--font-title);
  font-size: 2.2rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.fallback-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.profile-info-container {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.profile-header-meta {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 1.25rem;
}

.profile-name {
  font-family: var(--font-title);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

.profile-title {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--cyan);
  font-family: var(--font-main);
  letter-spacing: 0px;
}

.profile-lab-sub {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

.profile-contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  background: rgba(255, 255, 255, 0.02);
  border: var(--border-glass);
  padding: 1.25rem;
  border-radius: 12px;
}

@media (max-width: 600px) {
  .profile-contact-grid {
    grid-template-columns: 1fr;
  }
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-item i {
  font-size: 1.25rem;
  color: var(--cyan);
  background: rgba(0, 242, 254, 0.08);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-lbl {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.contact-val {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 500;
}

.cv-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

@media (max-width: 768px) {
  .cv-container {
    grid-template-columns: 1fr;
  }
}

.cv-title {
  font-family: var(--font-title);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.05);
  padding-bottom: 0.5rem;
}

.cv-title i {
  color: var(--cyan);
}

.cv-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.cv-list li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.cv-period {
  font-family: var(--font-mono);
  color: var(--cyan);
  font-weight: 500;
  white-space: nowrap;
  font-size: 0.8rem;
  background: rgba(0, 242, 254, 0.04);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  border: 1px solid rgba(0, 242, 254, 0.1);
}

.cv-list strong {
  color: var(--text-primary);
}

/* ==========================================================================
   Patent Specific Styles
   ========================================================================== */
.pub-badge.patent {
  background: rgba(0, 230, 118, 0.08);
  border: 1px solid rgba(0, 230, 118, 0.25);
  color: var(--success);
}

.pub-card:hover .pub-badge.patent {
  box-shadow: 0 0 10px rgba(0, 230, 118, 0.2);
}

/* ==========================================================================
   Keyword Tag Cloud Chips (Dashboard)
   ========================================================================== */
.topic-chip {
  background: rgba(255, 255, 255, 0.02);
  border: var(--border-glass);
  border-radius: 10px;
  padding: 0.35rem 0.7rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: var(--transition-smooth);
  cursor: pointer;
  font-family: var(--font-main);
}
.topic-chip::before {
  content: '\ea60';
  font-family: 'remixicon' !important;
  font-size: 0.75rem;
  color: var(--cyan);
  opacity: 0.7;
}
.topic-chip:hover {
  background: rgba(0, 242, 254, 0.07);
  border-color: rgba(0, 242, 254, 0.3);
  color: var(--text-primary);
  transform: translateY(-2px);
}
.topic-chip.active {
  background: rgba(0, 242, 254, 0.12);
  border-color: rgba(0, 242, 254, 0.5);
  color: var(--cyan);
  font-weight: 600;
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.15);
}

/* ==========================================================================
   Publication Card (Grid View) – new classes used by app.js
   ========================================================================== */
.pub-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: var(--border-glass);
  border-radius: 18px;
  padding: 1.75rem;
  transition: var(--transition-smooth);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.pub-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: var(--transition-smooth);
}
.pub-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-5px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
  border-color: rgba(255, 255, 255, 0.1);
}
.pub-card:hover::before { opacity: 1; }

/* Category color variants */
.pub-card.cat-journal::before  { background: var(--primary-gradient); }
.pub-card.cat-patent::before   { background: linear-gradient(90deg, #00e676, #00c853); }
.pub-card.cat-conference::before { background: var(--purple-gradient); }
.pub-card.cat-book::before     { background: linear-gradient(90deg, #f857a6, #ff5858); }

.pub-card.cat-journal { border-top-color: rgba(0, 242, 254, 0.12); }
.pub-card.cat-patent  { border-top-color: rgba(0, 230, 118, 0.12); }
.pub-card.cat-conference { border-top-color: rgba(138, 43, 226, 0.15); }
.pub-card.cat-book    { border-top-color: rgba(248, 87, 166, 0.12); }

/* Card inner elements */
.card-cat-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  font-weight: 500;
}
.cat-journal  .card-cat-badge { color: var(--cyan); }
.cat-patent   .card-cat-badge { color: var(--success); }
.cat-conference .card-cat-badge { color: #c792ea; }
.cat-book     .card-cat-badge { color: var(--magenta); }

.card-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  border: var(--border-glass);
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  align-self: flex-start;
}

.card-title-text {
  font-family: var(--font-title);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text-primary);
  transition: var(--transition-fast);
  flex-grow: 1;
}
.pub-card:hover .card-title-text { color: var(--cyan); }

.card-venue {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-style: italic;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.card-meta strong { color: var(--text-secondary); }

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
  padding-top: 0.5rem;
}

.item-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.02);
  border: var(--border-glass);
  padding: 0.2rem 0.5rem;
  border-radius: 5px;
}
.muted-tag {
  color: var(--text-muted);
  opacity: 0.6;
}

/* Scope / Status badges */
.scope-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-family: var(--font-mono);
}
.badge-intl {
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.3);
  color: var(--cyan);
}
.badge-dom {
  background: rgba(138, 43, 226, 0.1);
  border: 1px solid rgba(138, 43, 226, 0.3);
  color: #c792ea;
}

/* ==========================================================================
   Table View (DataSheet)
   ========================================================================== */
.table-wrapper {
  overflow-x: auto;
  border-radius: 16px;
  border: var(--border-glass);
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.pub-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}
.pub-table th {
  background: rgba(255, 255, 255, 0.02);
  font-family: var(--font-title);
  color: var(--text-primary);
  font-weight: 700;
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  white-space: nowrap;
}
.pub-table td {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  vertical-align: middle;
}
.table-row-clickable {
  cursor: pointer;
  transition: var(--transition-fast);
}
.table-row-clickable:hover {
  background: rgba(0, 242, 254, 0.03);
}
.table-row-clickable:hover .table-title-cell {
  color: var(--cyan);
}
.table-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.table-title-cell {
  color: var(--text-primary);
  font-weight: 500;
  max-width: 420px;
  transition: var(--transition-fast);
}
.table-cat-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 0.25rem 0.6rem;
  border-radius: 20px;
  border: var(--border-glass);
  white-space: nowrap;
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-muted);
}
.table-cat-chip.cat-journal   { color: var(--cyan);    border-color: rgba(0,242,254,0.2); }
.table-cat-chip.cat-patent    { color: var(--success); border-color: rgba(0,230,118,0.2); }
.table-cat-chip.cat-conference{ color: #c792ea;        border-color: rgba(138,43,226,0.2); }
.table-cat-chip.cat-book      { color: var(--magenta); border-color: rgba(248,87,166,0.2); }

/* ==========================================================================
   Timeline View – additional classes
   ========================================================================== */
.timeline-item.timeline-left {
  justify-content: flex-end;
  padding-right: 3rem;
}
.timeline-item.timeline-right {
  margin-left: 50%;
  justify-content: flex-start;
  padding-right: 0;
  padding-left: 3rem;
}
.timeline-dot {
  display: none; /* Dot rendered via ::after in base .timeline-item */
}

/* ==========================================================================
   Empty State
   ========================================================================== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6rem 2rem;
  text-align: center;
  background: var(--bg-card);
  border-radius: 20px;
  border: var(--border-glass);
  gap: 0.75rem;
}
.empty-state i {
  font-size: 3rem;
  color: var(--text-muted);
}
.empty-state p {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Modal Detail Table
   ========================================================================== */
.modal-detail-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.modal-detail-table td {
  padding: 0.65rem 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  vertical-align: top;
}
.modal-detail-table td:first-child {
  color: var(--text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
  width: 140px;
  font-family: var(--font-mono);
}
.modal-detail-table td:last-child {
  color: var(--text-primary);
  font-weight: 500;
}

/* ==========================================================================
   Submitted Badge
   ========================================================================== */
.badge-submitted {
  background: rgba(255, 160, 0, 0.12);
  color: #ffb300;
  border: 1px solid rgba(255, 160, 0, 0.3);
}

.badge-accepted {
  background: rgba(0, 230, 118, 0.12);
  color: #00e676;
  border: 1px solid rgba(0, 230, 118, 0.35);
}

/* ==========================================================================
   Research Funding Section
   ========================================================================== */
.funding-section {
  margin-bottom: 2rem;
}

.funding-stats-grid {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.funding-stat {
  flex: 1;
  min-width: 160px;
  background: rgba(255, 255, 255, 0.03);
  border: var(--border-glass);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.funding-stat-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.funding-stat.purple-glow .funding-stat-num {
  background: var(--purple-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.funding-stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.funding-stat-label em {
  font-style: normal;
  opacity: 0.65;
  font-size: 0.72rem;
}

.funding-table-wrapper {
  overflow-x: auto;
}

.funding-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.funding-table thead th {
  text-align: left;
  padding: 0.6rem 0.75rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-family: var(--font-mono);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  white-space: nowrap;
}

.funding-table tbody tr {
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  transition: background 0.15s ease;
}

.funding-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

.funding-table td {
  padding: 0.7rem 0.75rem;
  vertical-align: middle;
  color: var(--text-secondary);
}

.fund-year {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.fund-title {
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.4;
}

.fund-center {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.fund-amount {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--cyan);
  white-space: nowrap;
}

@media (max-width: 768px) {
  .funding-stats-grid {
    gap: 1rem;
  }
  .funding-table {
    font-size: 0.8rem;
  }
}

/* ==========================================================================
   Language Switcher
   ========================================================================== */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  padding: 3px;
  flex-shrink: 0;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 5px;
  cursor: pointer;
  transition: var(--transition-fast);
  line-height: 1;
}

.lang-btn.active {
  background: var(--primary-gradient);
  color: #000;
}

.lang-btn:hover:not(.active) {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.07);
}

@media (max-width: 768px) {
  .lang-switcher {
    margin-left: auto;
  }
}

/* ==========================================================================
   DOI Link
   ========================================================================== */
.doi-link {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
  color: var(--cyan);
  text-decoration: none;
  padding: 0.2rem 0.55rem;
  border-radius: 20px;
  border: 1px solid var(--border-glow);
  background: var(--bg-badge);
  transition: background 0.2s ease, border-color 0.2s ease;
  vertical-align: middle;
  word-break: break-all;
}
.doi-link:hover,
.doi-link:focus-visible {
  background: rgba(0, 242, 254, 0.2);
  border-color: var(--cyan);
}
.modal-detail-table .doi-link {
  font-size: 0.85rem;
  font-weight: 500;
  text-transform: none;
}

/* SCIE indexing badge */
.badge-scie {
  background: rgba(255, 193, 7, 0.14);
  color: #ffc107;
  border: 1px solid rgba(255, 193, 7, 0.35);
}

/* ESCI / Scopus indexing badges */
.badge-esci {
  background: rgba(0, 230, 118, 0.12);
  color: var(--success);
  border: 1px solid rgba(0, 230, 118, 0.35);
}
.badge-scopus {
  background: rgba(255, 128, 0, 0.12);
  color: #ff9a3c;
  border: 1px solid rgba(255, 128, 0, 0.35);
}
/* Scopus is mixed-case; keep it from being uppercased */
.badge-scopus { text-transform: none; }

/* KCI indexing badge */
.badge-kci {
  background: rgba(248, 87, 166, 0.12);
  color: var(--magenta);
  border: 1px solid rgba(248, 87, 166, 0.35);
}