:root {
  --bg: #ffffff;
  --card: #f8fafc;
  --muted: #64748b;
  --accent: #0ea5e9;
  --text: #1e293b;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
  margin: 0;
  background: url('../images/background.png') no-repeat center center fixed;
  background-size: cover;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

.container{max-width:1000px;margin:0 auto;padding:28px}
.site-header {
  backdrop-filter: blur(6px);
  background: rgba(255, 255, 255, 0.9);
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.name {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  color: #0f172a;
}

.title {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
}

.nav a {
  color: var(--text);
  margin-left: 20px;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav a:hover {
  color: var(--accent);
}
.main{padding-top:36px;padding-bottom:60px}
.card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 12px;
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.about-page {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding: 40px 20px;
  text-align: center;
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-photo-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 25px;
}

.about-photo {
  width: 140px !important;
  height: 140px !important;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid #00bcd4;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-photo:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.section-title {
  font-size: 2rem;
  margin-bottom: 10px;
  font-weight: 700;
}

.lead {
  font-size: 1.1rem;
  margin-bottom: 25px;
  color: #555;
}

.info-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.info-list li {
  margin-bottom: 10px;
}

.social-buttons {
  margin-top: 10px;
  display: flex;
  justify-content: center;
  gap: 12px;
}

.social-btn {
  background-color: #00bcd4;
  color: white;
  padding: 8px 14px;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.3s ease;
}

.social-btn:hover {
  background-color: #0097a7;
}


.projects-page h1 {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: var(--accent);
}

.projects-page h1 ::after {
  content: "";
  display: block;
  width: 60px;
  height: 4px;
  background: var(--accent);
  margin: 0.5rem auto;
  border-radius: 2px;
}

.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.project {
  padding: 20px;
  border-radius: 12px;
  background: rgba(255,255,255,0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.project:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  background: rgba(255,255,255,0.08);
}
.project-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 20px;
  min-height: 110px;
}

.project h3 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--accent);
}

.project-animation {
  width: 100px;
  height: 100px;
  transition: transform 0.3s ease, filter 0.3s ease;
  filter: grayscale(20%) opacity(80%);
  vertical-align: middle;
  margin-top: -16px; /* Adjust vertical alignment for larger size */
}

.project-animation:hover {
  transform: scale(1.05);
  filter: grayscale(0%) opacity(100%);
}


.muted{color:var(--muted);font-size:0.9rem}
.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.skills-page h1 {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: var(--accent);
}

.skill-item {
  background: rgba(255,255,255,0.05);
  padding: 10px 20px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.3s ease;
  min-width: 180px;
}

.skill-item:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}

.skill-logo {
  width: 32px;
  height: 32px;
  filter: grayscale(20%) opacity(80%);
  transition: all 0.3s ease;
  margin-right: 4px;
}

.skill-item:hover .skill-logo {
  filter: grayscale(0%) opacity(100%);
}

.skill-name {
  font-size: 0.95rem;
}
.contact-links .btn{display:inline-block;margin-right:8px;padding:10px 14px;background:var(--accent);color:#042027;border-radius:8px;text-decoration:none}
.site-footer{padding:20px 0;color:var(--muted);text-align:center}
.notice{padding:40px;text-align:center}

/* Research Publications */
.publications-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.publications-page h1 {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: var(--accent);
}


.publications-item {
  border-bottom: 1px solid rgba(100, 116, 139, 0.2);
  padding-bottom: 1.5rem;
}

.publications-item:last-child {
  border-bottom: none;
}

.publications-item h3 {
  color: var(--accent);
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
}

.publications-meta {
  display: flex;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.9em;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

/* Language styles */
.language-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.language-item {
  background: rgba(14, 165, 233, 0.1);
  padding: 0.8rem 1.2rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 1rem;
  min-width: 200px;
  transition: all 0.2s ease;
}

.language-item:hover {
  transform: translateY(-2px);
  background: rgba(14, 165, 233, 0.15);
}

.language-name {
  font-weight: 500;
  color: var(--accent);
}

.language-level {
  color: var(--muted);
  font-size: 0.9em;
}

/* Work Experience */
.experience-page h1 {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: var(--accent);
}

.experience-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.experience-item {
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(100, 116, 139, 0.2);
}

.experience-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.experience-item h3 {
  color: var(--accent);
  margin: 0 0 0.5rem 0;
  font-size: 1.2rem;
}

.experience-meta {
  display: flex;
  gap: 1rem;
  color: var(--text);
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.duration {
  color: var(--muted);
  font-size: 0.9em;
  margin-bottom: 1rem;
}

.duration-calc {
  color: var(--accent);
  font-size: 0.9em;
  margin-left: 0.5rem;
}

.location {
  color: var(--muted);
}

.experience-description {
  color: var(--text);
  line-height: 1.6;
  margin: 0;
}

.research-abstract {
  color: var(--text);
  margin: 1rem 0;
  line-height: 1.6;
}

.research-links {
  display: flex;
  gap: 1rem;
  margin: 1rem 0;
}

.paper-link, .code-link {
  display: inline-block;
  padding: 0.5rem 1rem;
  background-color: var(--accent);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.paper-link:hover, .code-link:hover {
  background-color: #0284c7;
  transform: translateY(-2px);
}

.technologies {
  font-size: 0.9em;
  color: var(--muted);
  margin-top: 0.5rem;
}

/* Certification styles */
.certification-list {
  list-style: none;
  padding: 0;
}

.certification-list li {
  margin-bottom: 1rem;
  padding: 0.5rem;
  border-radius: 4px;
  transition: background-color 0.2s ease;
}

.certification-list li:hover {
  background-color: rgba(14, 165, 233, 0.1);
}

.cert-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.cert-link:hover {
  text-decoration: underline;
}

.cert-issuer {
  color: var(--muted);
  margin-left: 0.5rem;
}

.cert-year {
  color: var(--muted);
  margin-left: 0.5rem;
}



/* Smooth scrolling */
html{scroll-behavior:smooth}

@media (max-width:720px){
  .about-grid{grid-template-columns:1fr}
  .site-header .container{flex-direction:column;gap:10px;align-items:flex-start}
  .nav a{margin-left:8px}
}

.about-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.about-photo-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 1.5rem;
}

.about-photo {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}


.about-photo:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

@media (max-width: 720px) {
  .about-photo {
    width: 110px;
    height: 110px;
  }
}



/* --- Enhanced Projects Page Styling --- */
.projects-page {
  text-align: center;
  padding: 40px 20px;
}

.projects-page h1 {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
  display: inline-block;
  margin-bottom: 2.5rem;
}

.projects-page h1::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  border-radius: 2px;
  background-color: var(--accent);
}

/* --- Projects Grid Layout --- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 25px;
  justify-items: center;
}

/* --- Project Cards --- */
.project-card {
  background: rgba(255, 255, 255, 0.9);
  border-radius: 16px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
  padding: 24px;
  text-align: left;
  width: 100%;
  max-width: 420px;
  transition: all 0.3s ease;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.1);
}

/* --- Project Header & Logo --- */
.project-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 15px;
}

.project-logo img {
  width: 70px;
  height: 70px;
  border-radius: 10px;
  object-fit: contain;
  transition: transform 0.3s ease, filter 0.3s ease;
  filter: grayscale(20%) opacity(85%);
}

.project-logo img:hover {
  transform: scale(1.1);
  filter: grayscale(0%) opacity(100%);
}

/* --- Buttons & Links --- */
.project-btn {
  display: inline-block;
  padding: 10px 18px;
  background-color: var(--accent);
  color: white;
  font-weight: 500;
  text-decoration: none;
  border-radius: 8px;
  transition: background 0.3s ease, transform 0.2s ease;
}

.project-btn:hover {
  background-color: #0284c7;
  transform: translateY(-2px);
}

/* --- Project Meta --- */
.project-meta {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: right;
}

/* --- Contact Section with Box Design --- */
.contact-section {
  background: rgba(14, 165, 233, 0.05); /* light blue tint */
  border: 2px solid rgba(14, 165, 233, 0.2);
  border-radius: 16px;
  padding: 50px 30px;
  margin: 60px auto;
  max-width: 800px;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

/* Hover effect to lift the box */
.contact-section:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.1);
  border-color: var(--accent);
}

/* Heading inside contact box */
.contact-section h2 {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Contact Links inside box */
.contact-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
}

/* Blue links */
.contact-links a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  color: var(--accent);
  background: rgba(14, 165, 233, 0.1);
  border-radius: 10px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
}

/* Hover effect for links */
.contact-links a:hover {
  background: var(--accent);
  color: #ffffff;
  transform: translateY(-2px);
}