:root{
  --accent:#111827;
  --bg:#0b0f17;
  --text:#e5e7eb;
  --card-bg:rgba(15, 23, 42, 0.3);
  --card-border:rgba(30, 41, 59, 0.5);
  --text-muted:#d1d5db;
  --text-em:#a5b4fc;
  --link-primary:#60a5fa;
  --link-hover:#93c5fd;
}

/* Global font size reduction - reduce by 4pt (0.25rem) */
html {
  font-size: 17px;
}
/* 
body {
  font-size: 0.95rem;
}

h1 {
  font-size: calc(1.5rem - 4pt);
}

h2 {
  font-size: calc(1.3rem - 4pt);
}

h3 {
  font-size: calc(1.1rem - 4pt);
}

h4, h5, h6 {
  font-size: calc(1rem - 4pt);
}

p, div, span, a {
  font-size: inherit;
} */

/* Page width control - center content and reduce clutter */
.container {
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 15px;
  padding-right: 15px;
}

/* Light mode styles */
body:not(.dark) {
  --accent: #f8fafc;
  --bg: #f1f5f9;
  --text: #1e293b;
  --card-bg: rgba(248, 250, 252, 0.8);
  --card-border: rgba(226, 232, 240, 0.8);
  --text-muted: #64748b;
  --text-em: #3b82f6;
  --link-primary: #2563eb;
  --link-hover: #1d4ed8;
}

body{
  background-color:var(--bg);
  color:var(--text);
}
a{color:var(--link-primary)}
.navbar, .page-header{background:transparent !important}
.btn-primary{background:#111827;border-color:#111827}

/* Theme Toggle Switch */
.theme-toggle {
  display: flex;
  align-items: center;
}

.theme-switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 30px;
  margin: 0;
}

.theme-toggle-checkbox {
  opacity: 0;
  width: 0;
  height: 0;
}

.theme-slider {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 30px;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.theme-slider::before {
  content: "";
  position: absolute;
  height: 22px;
  width: 22px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  border-radius: 50%;
  transition: transform 0.3s ease;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.theme-toggle-checkbox:checked + .theme-slider {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

.theme-toggle-checkbox:checked + .theme-slider::before {
  transform: translateX(30px);
}

.theme-slider i {
  font-size: 14px;
  z-index: 1;
  transition: opacity 0.3s ease;
}

.light-icon {
  color: #fbbf24;
}

.dark-icon {
  color: #e0e7ff;
}

.theme-toggle-checkbox:checked + .theme-slider .light-icon {
  opacity: 0.3;
}

.theme-toggle-checkbox:not(:checked) + .theme-slider .dark-icon {
  opacity: 0.3;
}

/* Header (navbar) */
#navbar-main.navbar{
  background:rgba(11,15,23,.6) !important;
  backdrop-filter:saturate(150%) blur(8px);
}
#navbar-main .navbar-brand,
#navbar-main .nav-link{color:var(--text) !important}
#navbar-main .nav-link:hover{color:#93c5fd !important}

/* Light mode navbar */
body:not(.dark) #navbar-main.navbar {
  background: rgba(255, 255, 255, 0.8) !important;
  backdrop-filter: saturate(150%) blur(8px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.5);
}
body:not(.dark) #navbar-main .navbar-brand,
body:not(.dark) #navbar-main .nav-link {
  color: var(--text) !important;
}
body:not(.dark) #navbar-main .nav-link:hover {
  color: var(--link-hover) !important;
}

/* Hero/About section */
section#about .home-section-bg{background:linear-gradient(180deg, rgba(17,24,39,.6) 0%, rgba(11,15,23,0) 60%)}
#profile .avatar{box-shadow:0 10px 30px rgba(0,0,0,.35)}
#profile .portrait-title h2{color:#f3f4f6;font-weight:800}
#profile .portrait-title h3{color:#cbd5e1;font-weight:500}
.network-icon .big-icon{color:#94a3b8}
.network-icon a:hover .big-icon{color:#93c5fd}

/* Light mode hero section */
body:not(.dark) section#about .home-section-bg {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg) 100%);
}

body:not(.dark) section#about {
  background-color: var(--bg);
}
body:not(.dark) #profile .avatar {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}
body:not(.dark) #profile .portrait-title h2 {
  color: var(--text);
  font-weight: 800;
}
body:not(.dark) #profile .portrait-title h3 {
  color: var(--text-muted);
  font-weight: 500;
}
body:not(.dark) .network-icon .big-icon {
  color: var(--text-muted);
}
body:not(.dark) .network-icon a:hover .big-icon {
  color: var(--link-primary);
}

/* Headings */
.home-section h1{color:#f3f4f6;font-weight:800;letter-spacing:.2px}
.section-subheading{color:#e5e7eb;font-weight:700}

/* Light mode headings */
body:not(.dark) .home-section h1 {
  color: var(--text);
  font-weight: 800;
  letter-spacing: .2px;
}
body:not(.dark) .section-subheading {
  color: var(--text);
  font-weight: 700;
}

/* Buttons */
.btn{border-radius:10px}
.btn.btn-outline-primary{color:#93c5fd;border-color:#1f2937}
.btn.btn-outline-primary:hover{background:#1f2937;color:#e5e7eb}

/* Light mode buttons */
body:not(.dark) .btn.btn-outline-primary {
  color: var(--link-primary);
  border-color: var(--card-border);
}
body:not(.dark) .btn.btn-outline-primary:hover {
  background: var(--card-bg);
  color: var(--text);
}

/* Skill bars */
.skills-wrapper{background:transparent;border:1px solid #1f2937}
.skills-percent{background:#111827}

/* Light mode skill bars */
body:not(.dark) .skills-wrapper {
  background: transparent;
  border: 1px solid var(--card-border);
}
body:not(.dark) .skills-percent {
  background: var(--accent);
}

/* Cards */
.card{background:#0e131c;border:1px solid #17202e}
.card .text-muted{color:#a5b4fc !important}

/* Light mode cards */
body:not(.dark) .card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
}
body:not(.dark) .card .text-muted {
  color: var(--text-muted) !important;
}

/* Project Filter Buttons */
.project-toolbar {
  margin-bottom: 1rem;
}

.project-filters .btn-toolbar {
  margin-bottom: 2rem;
}

.project-filters .btn-group {
  gap: 0.5rem;
}

.project-filters .btn-primary {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #93c5fd;
  padding: 0.5rem 1.5rem;
  transition: all 0.3s ease;
}

.project-filters .btn-primary:hover {
  background: rgba(30, 41, 59, 0.8);
  border-color: rgba(59, 130, 246, 0.5);
  color: #e5e7eb;
  transform: translateY(-2px);
}

.project-filters .btn-primary.active {
  background: #111827;
  border-color: #3b82f6;
  color: #e5e7eb;
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.3);
}

/* Light mode project filters */
body:not(.dark) .project-filters .btn-primary {
  background: rgba(248, 250, 252, 0.8);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: var(--link-primary);
  padding: 0.5rem 1.5rem;
  transition: all 0.3s ease;
}

body:not(.dark) .project-filters .btn-primary:hover {
  background: rgba(248, 250, 252, 1);
  border-color: rgba(59, 130, 246, 0.5);
  color: var(--text);
  transform: translateY(-2px);
}

body:not(.dark) .project-filters .btn-primary.active {
  background: var(--accent);
  border-color: #3b82f6;
  color: var(--text);
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.2);
}

/* Dark mode project containers - enhanced styling */
.dark .project-container {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(30, 41, 59, 0.8) 100%);
  border: 2px solid rgba(59, 130, 246, 0.3);
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.4);
  border-radius: 12px;
}

.dark .project-container:hover {
  border-color: rgba(59, 130, 246, 0.6);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  transform: translateY(-3px);
}

.dark .project-preview {
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 8px;
}

.dark .project-details h3 {
  color: #f1f5f9;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  font-weight: 800;
}

/* Light mode project containers - clean, bright styling */
body:not(.dark) .project-container {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 252, 0.95) 100%);
  border: 2px solid rgba(226, 232, 240, 0.9);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  border-radius: 12px;
}

body:not(.dark) .project-container:hover {
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
}

body:not(.dark) .project-preview {
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  border: 1px solid rgba(226, 232, 240, 0.8);
  border-radius: 8px;
}

body:not(.dark) .project-details h3 {
  color: #1e293b;
  text-shadow: none;
  font-weight: 800;
}

/* Dark mode blog cards - enhanced styling */
.dark .blog-card {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(30, 41, 59, 0.8) 100%);
  border: 2px solid rgba(59, 130, 246, 0.3);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
  border-radius: 12px;
}

.dark .blog-card:hover {
  border-color: rgba(59, 130, 246, 0.6);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
  transform: translateY(-3px);
}

.dark .blog-card h3 {
  color: #f1f5f9;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  font-weight: 800;
}

/* Light mode blog cards - clean, bright styling */
body:not(.dark) .blog-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 252, 0.95) 100%);
  border: 2px solid rgba(226, 232, 240, 0.9);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  border-radius: 12px;
}

body:not(.dark) .blog-card:hover {
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
}

body:not(.dark) .blog-card h3 {
  color: #1e293b;
  text-shadow: none;
  font-weight: 800;
}

/* Projects Grid Layout */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  max-width: 100%;
}

.project-container {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 1.5rem;
  align-items: start;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1.5rem;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.project-container:hover {
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  transform: translateY(-1px);
}

.project-preview {
  position: relative;
  overflow: hidden;
  border-radius: 6px;
  background: #1e293b;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-preview iframe {
  width: 100%;
  height: 100%;
  border: 0;
  border-radius: 6px;
}

.project-details {
  padding-left: 1rem;
}

.project-details h3 {
  color: #f3f4f6;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.project-details p {
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.project-details em {
  color: var(--text-em);
  font-style: italic;
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.85rem;
}

.project-details a {
  color: var(--link-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  font-size: 0.85rem;
  margin-right: 0.5rem;
}

.project-details a:hover {
  color: var(--link-hover);
}

.footer-separator {
  color: #64748b;
  margin: 0 0.3rem;
  font-size: 0.8rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .project-container {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 1rem;
  }
  
  .project-details {
    padding-left: 0;
  }
  
  .projects-grid {
    gap: 1.5rem;
  }
  
  .project-preview {
    height: 150px;
  }
}

@media (max-width: 480px) {
  .project-container {
    padding: 0.75rem;
  }
  
  .project-details h3 {
    font-size: 1.1rem;
  }
  
  .project-preview {
    height: 120px;
  }
}

/* Main content wrapper for separate pages (blog, projects) */
.main-content {
  padding-top: 80px;
  min-height: 100vh;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

/* Light mode main content */
body:not(.dark) .main-content {
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

/* Dark mode page headers */
.dark .main-content h1 {
  color: #f1f5f9;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  font-weight: 800;
}

.dark .main-content p {
  color: #cbd5e1;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* Light mode page headers */
body:not(.dark) .main-content h1 {
  color: #1e293b;
  text-shadow: none;
  font-weight: 800;
}

body:not(.dark) .main-content p {
  color: #475569;
  text-shadow: none;
}

/* Light mode section backgrounds */
body:not(.dark) .home-section {
  background-color: var(--bg);
}

body:not(.dark) section {
  background-color: var(--bg);
}

body:not(.dark) .page-body {
  background-color: var(--bg);
}

body:not(.dark) .wrapper {
  background-color: var(--bg);
}

/* Light mode specific sections */
body:not(.dark) #section-about {
  background-color: var(--bg);
}

body:not(.dark) #section-experience {
  background-color: var(--bg);
}

body:not(.dark) #section-projects {
  background-color: var(--bg);
}

body:not(.dark) #section-publications {
  background-color: var(--bg);
}

body:not(.dark) #section-contact {
  background-color: var(--bg);
}

/* Light mode containers and rows */
body:not(.dark) .container {
  background-color: transparent;
}

body:not(.dark) .row {
  background-color: transparent;
}

body:not(.dark) .col {
  background-color: transparent;
}

/* Light mode page footer */
body:not(.dark) .page-footer {
  background: var(--bg);
  border-top: 1px solid var(--card-border);
}

.wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-footer {
  margin-top: auto;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 41, 59, 0.9) 100%);
  padding: 2rem 0;
  border-top: 1px solid rgba(59, 130, 246, 0.2);
  backdrop-filter: blur(10px);
}

/* Light mode page footer */
body:not(.dark) .page-footer {
  background: linear-gradient(135deg, rgba(248, 250, 252, 0.95) 0%, rgba(241, 245, 249, 0.9) 100%);
  border-top: 1px solid rgba(226, 232, 240, 0.8);
}


/* Blog card styles */
.blog-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  border-color: rgba(59, 130, 246, 0.4);
}

/* Blog card structure - Simple text cards */
.blog-card {
  border: 1px solid var(--card-border);
  border-radius: 8px;
  background: var(--card-bg);
  margin-bottom: 1.5rem;
  padding: 1.5rem;
  transition: all 0.3s ease;
  overflow: hidden;
}

.blog-card .blog-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.blog-card .blog-meta i {
  font-size: 0.85rem;
}

.blog-card .blog-meta .separator {
  margin: 0 0.25rem;
}

.blog-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.4;
  color: var(--text);
}

.blog-card h3 a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

.blog-card h3 a:hover {
  color: var(--link-primary);
}

.blog-card p {
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1rem;
  color: var(--text-muted);
}

.blog-card a.read-more {
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--link-primary);
  transition: color 0.3s ease;
}

.blog-card a.read-more:hover {
  color: var(--link-hover);
}

/* Navbar fixed styling */
.navbar.fixed-top {
  background: rgba(11, 15, 23, 0.95);
  backdrop-filter: blur(10px);
}

/* Light mode navbar fixed */
body:not(.dark) .navbar.fixed-top {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--card-border);
}

/* Project placeholder cards */
.project-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1rem;
  height: 200px;
}

.project-placeholder h3 {
  margin: 0;
  font-size: 1.2rem;
}

.project-placeholder p {
  margin: 0.5rem 0 0 0;
  opacity: 0.9;
  font-size: 0.9rem;
}

.project-placeholder.gradient-pink {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.project-placeholder.gradient-blue {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

/* Embedded iframe wrapper */
.iframe-wrapper {
  position: relative;
  overflow: hidden;
}

.iframe-wrapper-16-9 {
  left: 0;
  width: 100%;
  height: 0;
  position: relative;
  padding-bottom: 56.25%;
}

.iframe-wrapper-custom {
  left: 0;
  width: 100%;
  height: 0;
  position: relative;
  padding-bottom: 129.4118%;
}

.iframe-wrapper iframe {
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  position: absolute;
  border: 0;
}