/* ============================================
   Luka Homepage
   Warm minimal academic homepage template
   ============================================ */

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
}

body.theme-luka,
body.theme-luka *,
body.theme-luka *::before,
body.theme-luka *::after {
  box-sizing: border-box;
}

:root {
  --luka-bg: #fbfaf6;
  --luka-text: #253045;
  --luka-accent: #3b5f90;
  --luka-secondary: #697486;
  --luka-border: rgba(59, 95, 144, 0.18);
  --luka-shadow: rgba(35, 58, 92, 0.14);
  --luka-social-bg: #ffffff;
  --luka-social-text: #3b5f90;
  --luka-footer-border: rgba(59, 95, 144, 0.14);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --luka-bg: #1a1917;
    --luka-text: #d1cec7;
    --luka-accent: #e28a67;
    --luka-secondary: #9b9488;
    --luka-border: rgba(226, 138, 103, 0.2);
    --luka-shadow: rgba(0, 0, 0, 0.3);
    --luka-social-bg: #22211e;
    --luka-social-text: #d1cec7;
    --luka-footer-border: rgba(226, 138, 103, 0.15);
  }
}

[data-theme="dark"] {
  --luka-bg: #1a1917;
  --luka-text: #d1cec7;
  --luka-accent: #e28a67;
  --luka-secondary: #9b9488;
  --luka-border: rgba(226, 138, 103, 0.2);
  --luka-shadow: rgba(0, 0, 0, 0.3);
  --luka-social-bg: #22211e;
  --luka-social-text: #d1cec7;
  --luka-footer-border: rgba(226, 138, 103, 0.15);
}

[data-theme="light"] {
  --luka-bg: #fbfaf6;
  --luka-text: #253045;
  --luka-accent: #3b5f90;
  --luka-secondary: #697486;
  --luka-border: rgba(59, 95, 144, 0.18);
  --luka-shadow: rgba(35, 58, 92, 0.14);
  --luka-social-bg: #ffffff;
  --luka-social-text: #3b5f90;
  --luka-footer-border: rgba(59, 95, 144, 0.14);
}

body.theme-luka {
  background: var(--luka-bg);
  color: var(--luka-text);
  font-family: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 17px;
  line-height: 1.68;
  transition: background-color 0.3s ease, color 0.3s ease;
}

body.theme-luka a {
  color: var(--luka-accent);
  text-decoration: none;
}

body.theme-luka a:hover {
  filter: brightness(1.15);
}

body.theme-luka .top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--luka-bg);
  border-bottom: 1px solid var(--luka-footer-border);
  z-index: 1000;
}

body.theme-luka .nav-container {
  width: 100%;
  max-width: 1180px;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

body.theme-luka .nav-left a,
body.theme-luka .nav-brand {
  color: var(--luka-text);
  font-size: 18px;
  font-weight: 600;
}

body.theme-luka .nav-right {
  display: flex;
  align-items: center;
  gap: 18px;
}

body.theme-luka .nav-right a {
  color: var(--luka-secondary);
  font-size: 14px;
  font-weight: 500;
}

body.theme-luka .nav-right a:hover {
  color: var(--luka-accent);
}

body.theme-luka .theme-toggle {
  border: none;
  background: transparent;
  color: var(--luka-text);
  width: 40px;
  height: 40px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 18px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

body.theme-luka .theme-toggle:hover {
  background: var(--luka-border);
  color: var(--luka-accent);
}

body.theme-luka .wrapper {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  min-height: 100vh;
}

body.theme-luka .sidebar {
  width: 320px;
  flex-shrink: 0;
  position: fixed;
  top: 60px;
  left: calc(50% - 590px);
  height: calc(100vh - 60px);
  overflow-y: auto;
  text-align: center;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  padding-top: 52px;
  z-index: 100;
}

body.theme-luka .profile-card {
  width: 100%;
  padding: 0 20px;
  text-align: center;
}

body.theme-luka .image.avatar {
  display: block;
  margin: 0 auto 24px;
}

body.theme-luka .image.avatar img {
  width: 232px;
  height: 232px;
  border-radius: 50%;
  object-fit: cover;
  object-position: 50% 46%;
  box-shadow: 0 6px 24px var(--luka-shadow);
}

body.theme-luka .site-name {
  margin: 0 0 8px;
  color: var(--luka-text);
  font-size: 30px;
  line-height: 1.2;
}

body.theme-luka .site-role {
  margin: 0 0 10px;
  color: var(--luka-secondary);
  font-size: 14px;
  line-height: 1.5;
}

body.theme-luka .site-email {
  margin: 0 0 24px;
  color: var(--luka-secondary);
  font-size: 13px;
  font-family: "Ubuntu Mono", "SFMono-Regular", monospace;
  word-break: break-all;
}

body.theme-luka .social-icons {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

body.theme-luka .social-icons a {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--luka-social-bg);
  color: var(--luka-social-text) !important;
  box-shadow: 0 2px 8px rgba(61, 57, 41, 0.08);
  transition: transform 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

body.theme-luka .social-icons a:hover {
  background: var(--luka-accent);
  color: #fff !important;
  transform: translateY(-2px);
}

body.theme-luka .visitor-card {
  margin: 40px auto 0;
  width: 240px;
  padding: 18px 16px;
  border: 1px dashed var(--luka-border);
  border-radius: 14px;
  color: var(--luka-secondary);
  text-align: left;
}

body.theme-luka .profile-note {
  background: rgba(255, 255, 255, 0.42);
  border-style: solid;
}

body.theme-luka .visitor-card-title {
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--luka-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

body.theme-luka .visitor-card-body {
  font-size: 13px;
  line-height: 1.6;
}

body.theme-luka .content {
  flex: 1;
  min-width: 0;
  margin-left: 320px;
  padding: 104px 38px 48px 70px;
}

body.theme-luka .home-content {
  min-height: calc(100vh - 60px);
  padding-top: 112px;
  padding-bottom: 32px;
}

body.theme-luka .home-content .hero-section {
  margin-bottom: 54px;
}

body.theme-luka .home-content .section-body {
  max-width: 860px;
}

body.theme-luka .home-content .section-body > p:not(.action-row) {
  font-size: 22px;
  line-height: 1.68;
}

body.theme-luka .section {
  margin-bottom: 38px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

body.theme-luka .section.visible {
  opacity: 1;
  transform: translateY(0);
}

body.theme-luka .section-title {
  display: inline-block;
  margin: 0 0 22px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--luka-accent);
  color: var(--luka-accent);
  font-family: "Spectral", Georgia, serif;
  font-size: 29px;
  font-weight: 600;
}

body.theme-luka .section-body p {
  margin: 0 0 16px;
}

body.theme-luka .eyebrow {
  margin: 0 0 12px;
  color: var(--luka-accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

body.theme-luka .hero-title {
  margin: 0 0 22px;
  color: var(--luka-text);
  font-family: "Spectral", Georgia, serif;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  max-width: 760px;
}

body.theme-luka .action-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 20px;
}

body.theme-luka .pill-link,
body.theme-luka .material-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 14px;
  border: 1px solid var(--luka-border);
  border-radius: 999px;
  background: var(--luka-social-bg);
  color: var(--luka-accent);
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(37, 48, 69, 0.05);
}

body.theme-luka .pill-link:hover,
body.theme-luka .material-links a:hover {
  background: var(--luka-accent);
  color: #fff;
  filter: none;
}

body.theme-luka .card {
  background: transparent;
  padding: 0;
  box-shadow: none;
}

body.theme-luka .timeline-item {
  position: relative;
  margin-left: 20px;
  padding-left: 8px;
  padding-bottom: 20px;
}

body.theme-luka .timeline-item::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--luka-accent), rgba(194, 113, 79, 0.12));
}

body.theme-luka .timeline-item:last-child::before {
  bottom: 50%;
}

body.theme-luka .timeline-item::after {
  content: "";
  position: absolute;
  left: -25px;
  top: 22px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--luka-accent);
  border: 2px solid var(--luka-bg);
}

body.theme-luka .experience-item {
  display: flex;
  align-items: flex-start;
  gap: 18px;
}

body.theme-luka .experience-item + .experience-item {
  margin-top: 24px;
}

body.theme-luka .institution-logo {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
}

body.theme-luka .experience-content {
  flex: 1;
}

body.theme-luka .experience-content p {
  margin: 0 0 3px;
}

body.theme-luka .exp-title {
  font-size: 16px;
  color: var(--luka-text);
}

body.theme-luka .exp-detail {
  font-size: 15px;
  color: var(--luka-secondary);
}

body.theme-luka .exp-period {
  font-size: 14px;
  color: var(--luka-accent);
  font-weight: 500;
}

body.theme-luka .project-card {
  font-size: 17px;
  line-height: 1.76;
  padding: 18px 0 20px 18px;
  border-left: 3px solid var(--luka-accent);
}

body.theme-luka .project-card + .project-card {
  margin-top: 26px;
}

body.theme-luka .project-card p {
  margin: 8px 0 0;
  color: var(--luka-secondary);
}

body.theme-luka .course-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

body.theme-luka .course-grid span {
  padding: 14px 16px;
  border: 1px solid var(--luka-border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.46);
  color: var(--luka-text);
  font-size: 15px;
  line-height: 1.45;
}

body.theme-luka .material-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

body.theme-luka .skill-list .award-icon {
  min-width: 34px;
  color: var(--luka-accent);
  font-size: 13px;
  font-weight: 700;
}

body.theme-luka .publications ol.bibliography {
  list-style: none;
  padding: 0;
  margin: 0;
}

body.theme-luka .publications ol.bibliography li {
  margin-bottom: 22px;
  padding: 18px 0 18px 18px;
  border-left: 3px solid var(--luka-accent);
}

body.theme-luka .pub-content .title {
  margin-bottom: 6px;
  color: var(--luka-text);
  font-size: 17px;
  font-weight: 600;
}

body.theme-luka .pub-content .author {
  margin-bottom: 6px;
  color: var(--luka-secondary);
  font-size: 15px;
}

body.theme-luka .pub-content .periodical {
  margin-bottom: 8px;
  color: var(--luka-accent);
  font-size: 15px;
}

body.theme-luka .pub-content .links a {
  font-size: 14px;
  font-weight: 500;
}

body.theme-luka .awards-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

body.theme-luka .award-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 0;
}

body.theme-luka .award-icon {
  flex-shrink: 0;
  font-size: 20px;
}

body.theme-luka .award-text {
  color: var(--luka-text);
  font-size: 14px;
}

body.theme-luka .site-footer {
  width: 100%;
  flex-basis: 100%;
  padding: 20px 24px 28px 390px;
  text-align: center;
}

body.theme-luka .site-footer p {
  margin: 0;
  padding-top: 20px;
  border-top: 1px solid var(--luka-footer-border);
  color: var(--luka-secondary);
  font-size: 13px;
}

body.theme-luka .template-credit {
  display: inline-block;
  margin-top: 8px;
  font-size: 12px;
}

body.theme-luka h1,
body.theme-luka h2,
body.theme-luka h3,
body.theme-luka h4,
body.theme-luka strong {
  color: var(--luka-text);
}

@media (max-width: 1200px) {
  body.theme-luka .nav-container {
    padding: 0 20px;
  }

  body.theme-luka .nav-right a {
    font-size: 13px;
  }

  body.theme-luka .wrapper {
    flex-direction: column;
    padding: 0 20px;
  }

  body.theme-luka .sidebar {
    position: static;
    left: auto;
    width: 100%;
    height: auto;
    padding-top: 80px;
    overflow: visible;
  }

  body.theme-luka .profile-card {
    padding: 0;
  }

  body.theme-luka .content {
    margin-left: 0;
    width: 100%;
    padding: 32px 0 48px;
  }

  body.theme-luka .home-content {
    min-height: auto;
    padding-top: 32px;
  }

  body.theme-luka .home-content .section-body > p:not(.action-row) {
    font-size: 16px;
  }

  body.theme-luka .site-footer {
    padding: 32px 0;
  }

  body.theme-luka .site-footer p {
    padding-top: 0;
    border-top: none;
  }
}

@media (max-width: 640px) {
  body.theme-luka .nav-right {
    gap: 10px;
  }

  body.theme-luka .nav-right a {
    display: none;
  }

  body.theme-luka .image.avatar img {
    width: 148px;
    height: 148px;
  }

  body.theme-luka .site-name {
    font-size: 24px;
  }

  body.theme-luka .experience-item {
    gap: 12px;
  }

  body.theme-luka .institution-logo {
    width: 44px;
    height: 44px;
  }

  body.theme-luka .visitor-card {
    width: 100%;
    max-width: 280px;
  }

  body.theme-luka .course-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  body.theme-luka .section {
    margin-bottom: 32px;
  }

  body.theme-luka .section-title {
    font-size: 18px;
  }

  body.theme-luka .project-card,
  body.theme-luka .exp-detail,
  body.theme-luka .award-text,
  body.theme-luka .pub-content .author,
  body.theme-luka .pub-content .periodical {
    font-size: 13px;
  }
}