/* ===================================
   Modern Academic Website Styles
   =================================== */

/* ===== CSS Variables ===== */
:root {
  --primary-color: #6b46c1;
  --secondary-color: #805ad5;
  --accent-color: #9f7aea;
  --text-color: #333;
  --text-light: #666;
  --border-color: #e0e0e0;
  --bg-light: #f8f9fa;
  --bg-white: #ffffff;
  --sidebar-width: 280px;
  --max-width: 900px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background: #1a1a2e;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--secondary-color);
  display: inline-block;
}

h3 {
  font-size: 1.5rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-color);
  text-align: justify;
}

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

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

/* ===== Subscripts and Superscripts ===== */
sub, sup {
  font-size: 0.75em;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}

/* ===== Container ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Override for sections - use consistent width and centered */
section .container {
  max-width: 1000px;
  margin: 0 auto;
}

/* ===== Sidebar Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: #1a1a2e;
  border-right: 1px solid #2d2d44;
  box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  overflow-y: auto;
  padding: 2rem 0;
}

.navbar .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 1.5rem;
  height: auto;
}

.nav-profile {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid #2d2d44;
  width: 100%;
}

.nav-profile-image {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  border: 3px solid var(--secondary-color);
}

.nav-brand {
  margin-bottom: 0.5rem;
}

.nav-brand a {
  font-size: 1.3rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.5px;
}

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

.nav-subtitle {
  font-size: 0.9rem;
  color: #a0a0b0;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.nav-contact {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: #a0a0b0;
  margin-bottom: 1rem;
}

.nav-email {
  color: #a0a0b0;
  cursor: text;
}

.nav-social {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

.nav-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #2d2d44;
  border-radius: 50%;
  font-size: 1.1rem;
  color: #ffffff;
  transition: var(--transition);
}

.nav-social a:hover {
  background: var(--secondary-color);
  color: #ffffff;
  transform: translateY(-2px);
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: 100%;
}

.nav-link {
  font-weight: 500;
  color: #a0a0b0;
  padding: 0.75rem 1rem;
  border-radius: 6px;
  transition: var(--transition);
  text-align: left;
}

.nav-link:hover {
  background: #2d2d44;
  color: #ffffff;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1001;
  background: var(--bg-white);
  padding: 0.5rem;
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--primary-color);
  transition: var(--transition);
  border-radius: 2px;
}

/* ===== Main Content ===== */
main {
  margin-left: var(--sidebar-width);
}

/* ===== Sections ===== */
section {
  padding: 4rem 3rem;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

section:nth-child(even) {
  background: var(--bg-light);
}

.section-content {
  width: 100%;
}

/* ===== Hero Section ===== */
.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 4rem 3rem;
}

.hero-content {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 3rem;
}

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

.hero-text h1 {
  margin-bottom: 0.5rem;
}

.hero-text .subtitle {
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

.hero-image {
  flex: 0 0 300px;
}

.hero-image img {
  width: 100%;
  max-width: 300px;
  height: 300px;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(107, 70, 193, 0.2);
  object-fit: cover;
}

/* ===== Research Section ===== */
.research-description {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 2rem;
}

/* ===== Publications ===== */
.publications-list {
  list-style: none;
  counter-reset: publication-counter 8;
}

.publication-item {
  counter-increment: publication-counter -1;
  margin-bottom: 2rem;
  padding-left: 2.5rem;
  position: relative;
}

.publication-item::before {
  content: "[" counter(publication-counter) "]";
  position: absolute;
  left: 0;
  font-weight: 600;
  color: var(--primary-color);
}

.publication-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-color);
  margin-bottom: 0.25rem;
  line-height: 1.5;
}

.publication-title a {
  color: var(--text-color);
}

.publication-title a:hover {
  color: var(--primary-color);
}

.publication-authors {
  color: var(--text-light);
  margin-bottom: 0.25rem;
  font-size: 0.9rem;
}

.publication-venue {
  font-style: italic;
  color: var(--text-light);
  margin-bottom: 0.25rem;
  font-size: 0.9rem;
}

.publication-links {
  display: inline;
  font-size: 0.9rem;
}

.publication-link {
  color: var(--secondary-color);
  transition: var(--transition);
}

.publication-link:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

/* ===== CV Section ===== */
#cv {
  display: block;
  padding: 0;
  min-height: auto;
  background: #1a1a2e;
}

#cv .cv-wrapper {
  max-width: 1000px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

#cv h2 {
  color: #ffffff;
  border-bottom-color: var(--accent-color);
  margin-bottom: 1rem;
}

#cv p {
  margin-bottom: 1.5rem;
  color: #a0a0b0;
}

#cv .cv-download {
  color: var(--accent-color);
}

#cv .cv-download:hover {
  color: #ffffff;
}

.cv-embed {
  width: 100%;
  height: 800px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-top: 1rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.cv-download {
  color: var(--secondary-color);
  transition: var(--transition);
}

.cv-download:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

/* ===== Footer ===== */
.footer {
  background: #1a1a2e;
  color: var(--bg-white);
  padding: 2.5rem 0;
  text-align: center;
  margin-left: var(--sidebar-width);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #2d2d44;
  border-radius: 50%;
  color: var(--bg-white);
  font-size: 1.2rem;
  transition: var(--transition);
}

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

.footer-text {
  color: #a0a0b0;
  font-size: 0.9rem;
  margin: 0;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 0;
  }

  html {
    font-size: 14px;
  }

  main {
    margin-left: 0;
  }

  .footer {
    margin-left: 0;
  }

  .navbar {
    width: 250px;
    transform: translateX(-100%);
    transition: var(--transition);
  }

  .navbar.active {
    transform: translateX(0);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
  }

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

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }

  .container {
    padding: 0 1.5rem;
  }

  section {
    padding: 3rem 1.5rem;
    min-height: auto;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.6rem;
  }

  .hero-content {
    flex-direction: column-reverse;
    gap: 2rem;
  }

  .hero-image {
    flex: 0 0 250px;
  }

  .hero-image img {
    max-width: 250px;
    height: 250px;
  }

  section .container {
    max-width: 100%;
    padding: 0 1.5rem;
  }

  /* Publications - increase left padding on mobile to prevent overlap */
  .publication-item {
    padding-left: 3.5rem;
  }

  .cv-embed {
    height: 600px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  /* Publications - even more padding on very small screens */
  .publication-item {
    padding-left: 3.5rem;
  }

  .social-links a {
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }
}

/* ===== Academic Icons (Google Scholar) ===== */
.ai {
  font-family: 'Font Awesome 6 Free', 'Font Awesome 6 Brands';
  font-weight: 400;
}

.ai-google-scholar:before {
  content: "\f19d"; /* Using graduation cap as fallback */
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
}

/* ===== Utilities ===== */
.text-center {
  text-align: center;
}

.mb-2 {
  margin-bottom: 2rem;
}

.mt-2 {
  margin-top: 2rem;
}