/* Global Styles */
:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --light-bg: #f9f9f9;
    --dark-bg: #2c3e50;
    --text-color: #333;
    --light-text: #f9f9f9;
    --border-radius: 6px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    text-align: center;
    position: relative;
    margin-bottom: 40px;
}

h2:after {
    content: '';
    display: block;
    width: 80px;
    height: 3px;
    background-color: var(--primary-color);
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 15px;
}

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

a:hover {
    color: var(--accent-color);
}

ul {
    list-style-type: none;
}

img {
    max-width: 100%;
    height: auto;
}

section.section {
    padding: 80px 0;
}

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

.button {
    display: inline-block;
    padding: 8px 16px;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
}

.button:hover {
    background-color: var(--secondary-color);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

/* Header */
header {
    background-color: var(--dark-bg);
    color: #fff;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.profile-image {
    margin-right: 20px;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
    /* background-color: var(--primary-color); */
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-placeholder i {
    font-size: 60px;
    color: #fff;
}

.header-text h1 {
    margin-bottom: 5px;
    color: #fff;
}

.header-text p {
    margin-bottom: 5px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1rem;
}

.university {
    font-style: italic;
    color: var(--primary-color) !important;
}

/* Navigation */
nav {
    margin-top: 15px;
}

nav ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

nav li {
    margin: 0 10px;
}

nav a {
    color: #fff;
    font-weight: 500;
    padding: 5px 10px;
    transition: var(--transition);
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

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

/* About Section */
.about-content {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
}

.about-text {
    flex: 1;
    min-width: 300px;
}

.about-details {
    flex: 1;
    min-width: 300px;
}

.detail {
    margin-bottom: 20px;
}

.detail h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
}

.detail ul {
    padding-left: 20px;
}

.detail li {
    margin-bottom: 8px;
    position: relative;
    padding-left: 15px;
}

.detail li:before {
    content: "•";
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* Research Section */
.research-areas {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
}

.research-item {
    flex: 1 1 calc(50% - 30px);
    min-width: 280px;
    max-width: 500px;
    background-color: #fff;
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    text-align: center;
}

.research-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
}

.research-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.research-item h3 {
    margin-bottom: 15px;
    color: var(--secondary-color);
}

/* Publications */
.publications-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.publication-item {
    background-color: #fff;
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.publication-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.publication-item h3 {
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.authors {
    color: #666;
    font-style: italic;
    margin-bottom: 5px;
}

.venue {
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.publication-links {
    margin-top: 15px;
}

.publication-links a {
    margin-right: 10px;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.project-card {
    background-color: #fff;
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
}

.project-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.project-header i {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-right: 15px;
}

.project-header h3 {
    margin: 0;
    color: var(--secondary-color);
}

.project-tech {
    margin-top: auto;
    padding-top: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-tag {
    background-color: #edf2f7;
    color: var(--secondary-color);
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Experience */
.timeline {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
}

.timeline:before {
    content: '';
    position: absolute;
    left: 98.45px;
    height: 100%;
    width: 2px;
    background-color: var(--primary-color);
}

.timeline-item {
    display: flex;
    margin-bottom: 40px;
}

.timeline-date {
    width: 100px;
    flex-shrink: 0;
    text-align: right;
    padding-right: 25px;
    font-weight: bold;
    color: var(--primary-color);
    position: relative;
}

.timeline-date:after {
    content: '';
    position: absolute;
    right: -6px;
    top: 15px;
    width: 14px;
    height: 14px;
    background-color: var(--primary-color);
    border-radius: 50%;
    z-index: 1;
}

.timeline-content {
    flex: 1;
    background-color: #fff;
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.timeline-content h3 {
    margin-bottom: 5px;
    color: var(--secondary-color);
}

.organization {
    color: #666;
    font-weight: 500;
    margin-bottom: 15px;
    font-style: italic;
}

.timeline-content ul {
    padding-left: 20px;
    margin-bottom: 15px;
}

.timeline-content li {
    margin-bottom: 8px;
    position: relative;
    padding-left: 15px;
}

.timeline-content li:before {
    content: "•";
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

.skills-used {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 15px;
}

.skills-used span {
    background-color: #edf2f7;
    color: var(--secondary-color);
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Teaching Section */
.teaching-container {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.teaching-section h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    text-align: center;
}

.teaching-item {
    background-color: #fff;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 20px;
}

.teaching-course {
    font-weight: bold;
    margin-bottom: 5px;
}

.teaching-period {
    font-style: italic;
    color: #666;
}

.mentoring-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.mentoring-item {
    background-color: #fff;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.mentoring-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.student-name {
    font-weight: bold;
    margin-bottom: 5px;
}

.mentoring-period {
    font-style: italic;
    color: #666;
    margin-bottom: 5px;
}

.service-list {
    background-color: #fff;
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.service-list li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 20px;
}

.service-list li:before {
    content: "•";
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* Awards Section */
.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.award-item {
    display: flex;
    background-color: #fff;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.award-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.award-icon {
    margin-right: 15px;
    color: var(--primary-color);
    font-size: 2rem;
    display: flex;
    align-items: center;
}

.award-content h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: var(--secondary-color);
}

.award-year {
    font-style: italic;
    color: #666;
}

/* Skills Section */
.skills-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.skill-category h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 8px;
    display: inline-block;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag {
    background-color: #fff;
    color: var(--secondary-color);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
}

.skill-tag:hover {
    background-color: var(--primary-color);
    color: #fff;
    transform: translateY(-2px);
}

/* Contact Section */
.contact-container {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
}

.contact-info {
    flex: 1;
    min-width: 300px;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-item {
    display: flex;
    align-items: center;
    background-color: #fff;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.contact-icon {
    margin-right: 15px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.3rem;
}

.contact-text h3 {
    margin-bottom: 5px;
    color: var(--secondary-color);
    font-size: 1.2rem;
}

.contact-form {
    flex: 1;
    min-width: 300px;
    background-color: #fff;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--secondary-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.submit-btn {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    padding: 12px 25px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
}

.submit-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

/* Footer */
footer {
    background-color: var(--dark-bg);
    color: #fff;
    padding: 30px 0;
}

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

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    color: #fff;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

/* Scroll to Top */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: var(--box-shadow);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    border: none;
    z-index: 999;
}

.scroll-top.active {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
}

/* Responsive Styles */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }

    .profile-image {
        margin: 0 auto 20px;
    }

    .timeline:before {
        left: 20px;
    }

    .timeline-date {
        width: 60px;
        font-size: 0.9rem;
    }

    .timeline-date:after {
        right: -9px;
    }

    .contact-container {
        flex-direction: column;
    }

    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.7rem;
    }

    nav ul {
        flex-direction: column;
        align-items: center;
    }

    nav li {
        margin: 5px 0;
    }

    .section {
        padding: 50px 0;
    }
}

/* Animated Avatar */
#animated-avatar {
  position: fixed;
  bottom: 90px;
  right: 30px;
  width: 80px;
  height: 100px;
  z-index: 999;
  transition: all 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  cursor: pointer;
}

.avatar-body {
  position: relative;
  width: 100%;
  height: 100%;
}

.avatar-head {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: #3498db;
  overflow: hidden;
}

.avatar-face {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.avatar-eyes {
  display: flex;
  width: 70%;
  justify-content: space-between;
  margin-top: 5px;
}

.avatar-eye {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: white;
  position: relative;
}

.avatar-eye:after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: #2c3e50;
}

.avatar-mouth {
  width: 20px;
  height: 8px;
  border-radius: 0 0 10px 10px;
  background-color: white;
  margin-top: 5px;
}

.avatar-torso {
  position: absolute;
  top: 45px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 30px;
  background-color: #2c3e50;
  border-radius: 5px;
}

.avatar-arm {
  position: absolute;
  top: 50px;
  width: 12px;
  height: 30px;
  background-color: #3498db;
  border-radius: 6px;
}

.avatar-arm.left {
  left: 15px;
  transform-origin: top center;
  transform: rotate(10deg);
}

.avatar-arm.right {
  right: 15px;
  transform-origin: top center;
  transform: rotate(-10deg);
}

.avatar-legs {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 30px;
  display: flex;
  justify-content: space-between;
}

.avatar-leg {
  width: 12px;
  height: 25px;
  background-color: #2c3e50;
  border-radius: 6px;
}

/* Right arm - completely vertical */
.avatar-arm.right {
  right: 15px;
  transform-origin: top center;
  transform: rotate(-90deg); /* Completely vertical */
  animation: subtle-wave 0.5s ease-in-out infinite;
}

@keyframes subtle-wave {
  0% { transform: rotate(-85deg); }
  50% { transform: rotate(-95deg); }
  100% { transform: rotate(-85deg); }
}

/* Walking animation */
@keyframes walk {
  0% {
    transform: translateY(0) rotate(0);
  }
  25% {
    transform: translateY(-3px) rotate(10deg);
  }
  75% {
    transform: translateY(-3px) rotate(-10deg);
  }
  100% {
    transform: translateY(0) rotate(0);
  }
}

.walking .avatar-leg.left {
  animation: walk 0.5s ease-in-out infinite;
}

.walking .avatar-leg.right {
  animation: walk 0.5s ease-in-out infinite reverse;
}

/* Jump animation */
@keyframes jump {
  0% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
  100% { transform: translateY(0); }
}

.jumping {
  animation: jump 0.5s ease-in-out;
}