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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
}

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

:root {
  color-scheme: light;
  --luka-bg: #faf9f7;
  --luka-text: #3d3929;
  --luka-accent: #c2714f;
  --luka-secondary: #8c8577;
  --luka-border: rgba(194, 113, 79, 0.2);
  --luka-shadow: rgba(194, 113, 79, 0.15);
  --luka-social-bg: #ffffff;
  --luka-social-text: #8b7355;
  --luka-footer-border: rgba(194, 113, 79, 0.15);
  --luka-focus: #2f7d68;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: 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="dark"] {
  color-scheme: 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);
  --luka-focus: #7cc6b0;
}

[data-theme="light"] {
  color-scheme: light;
  --luka-bg: #faf9f7;
  --luka-text: #3d3929;
  --luka-accent: #c2714f;
  --luka-secondary: #8c8577;
  --luka-border: rgba(194, 113, 79, 0.2);
  --luka-shadow: rgba(194, 113, 79, 0.15);
  --luka-social-bg: #ffffff;
  --luka-social-text: #8b7355;
  --luka-footer-border: rgba(194, 113, 79, 0.15);
  --luka-focus: #2f7d68;
}

body.theme-luka {
  background: var(--luka-bg);
  color: var(--luka-text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  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 a:focus-visible,
body.theme-luka button:focus-visible {
  outline: 3px solid var(--luka-focus);
  outline-offset: 3px;
}

body.theme-luka img,
body.theme-luka svg {
  display: block;
}

body.theme-luka .skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 2000;
  padding: 8px 12px;
  border-radius: 8px;
  background: var(--luka-text);
  color: var(--luka-bg);
  font-size: 14px;
  font-weight: 600;
  transform: translateY(-140%);
  transition: transform 0.2s ease;
}

body.theme-luka .skip-link:focus {
  transform: translateY(0);
}

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: 1120px;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

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;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  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 .theme-icon {
  display: inline-flex;
}

body.theme-luka .theme-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

body.theme-luka .theme-icon-sun {
  display: none;
}

[data-theme="dark"] body.theme-luka .theme-icon-moon {
  display: none;
}

[data-theme="dark"] body.theme-luka .theme-icon-sun {
  display: inline-flex;
}

body.theme-luka .wrapper {
  width: 100%;
  max-width: 1120px;
  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% - 560px);
  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: 60px;
  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 28px;
}

body.theme-luka .image.avatar img {
  margin: 0 auto;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 6px 24px var(--luka-shadow);
}

body.theme-luka .site-name {
  margin: 0 0 8px;
  color: var(--luka-text);
  font-size: 28px;
  line-height: 1.2;
}

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 .theme-toggle svg {
  pointer-events: none;
}

body.theme-luka .content {
  flex: 1;
  min-width: 0;
  margin-left: 320px;
  padding: 120px 40px 80px 60px;
  overflow-wrap: break-word;
}

body.theme-luka .section {
  margin-bottom: 44px;
  opacity: 1;
  transform: none;
}

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

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

body.theme-luka .section-title {
  display: inline-block;
  margin: 0 0 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--luka-accent);
  color: var(--luka-accent);
  font-size: 19px;
  font-weight: 600;
}

body.theme-luka .section-body p {
  margin: 0 0 14px;
}

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: 16px;
}

body.theme-luka .institution-logo {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
}

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

body.theme-luka .experience-content p {
  margin: 0 0 2px;
}

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

body.theme-luka .exp-detail {
  font-size: 14px;
  color: var(--luka-secondary);
}

body.theme-luka .exp-period {
  font-size: 13px;
  color: var(--luka-accent);
  font-weight: 500;
}

body.theme-luka .project-card {
  font-size: 15px;
  line-height: 1.7;
}

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

body.theme-luka .publications ol.bibliography li {
  margin-bottom: 14px;
  padding: 15px 0 15px 16px;
  border-left: 3px solid var(--luka-accent);
}

body.theme-luka .pub-content .title {
  margin-bottom: 4px;
  color: var(--luka-text);
  font-size: 15px;
  font-weight: 600;
}

body.theme-luka .pub-content .author {
  margin-bottom: 4px;
  color: var(--luka-secondary);
  font-size: 14px;
}

body.theme-luka .pub-content .periodical {
  margin-bottom: 6px;
  color: var(--luka-accent);
  font-size: 14px;
}

body.theme-luka .pub-content .links a {
  font-size: 13px;
  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: 32px 24px 40px 380px;
  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 h1,
body.theme-luka h2,
body.theme-luka h3,
body.theme-luka h4,
body.theme-luka strong {
  color: var(--luka-text);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  body.theme-luka,
  body.theme-luka *,
  body.theme-luka *::before,
  body.theme-luka *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 1080px) {
  body.theme-luka .nav-container {
    padding: 0 20px;
  }

  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;
    padding: 32px 0 48px;
  }

  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 .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;
  }

}

@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;
  }
}