/* ============================================
   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-font-body: "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --luka-font-heading: "Montserrat", "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --luka-font-mono: "Roboto Mono", "SFMono-Regular", Consolas, monospace;
  --luka-bg: #ffffff;
  --luka-text: #202124;
  --luka-accent: #2f343a;
  --luka-accent-soft: #f0f1f2;
  --luka-accent-muted: #777d85;
  --luka-science-blue: rgb(22, 100, 192);
  --luka-science-blue-soft: #eef5ff;
  --luka-science-blue-border: rgba(22, 100, 192, 0.28);
  --luka-research-accent: rgb(18, 84, 168);
  --luka-research-soft: #eef5ff;
  --luka-research-border: rgba(18, 84, 168, 0.28);
  --luka-secondary: #555c64;
  --luka-border: rgba(47, 52, 58, 0.22);
  --luka-shadow: rgba(15, 23, 42, 0.08);
  --luka-social-bg: #ffffff;
  --luka-social-text: #4f555c;
  --luka-footer-border: rgba(15, 23, 42, 0.10);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --luka-bg: #171a1b;
    --luka-text: #ece7dc;
    --luka-accent: #c8d0d7;
    --luka-accent-soft: #2c3135;
    --luka-accent-muted: #9aa4ad;
    --luka-science-blue: #8ab7ca;
    --luka-science-blue-soft: #22333b;
    --luka-science-blue-border: rgba(138, 183, 202, 0.34);
    --luka-research-accent: #8fb0dd;
    --luka-research-soft: #1f2d42;
    --luka-research-border: rgba(143, 176, 221, 0.34);
    --luka-secondary: #a9afa7;
    --luka-border: rgba(200, 208, 215, 0.20);
    --luka-shadow: rgba(0, 0, 0, 0.32);
    --luka-social-bg: #202425;
    --luka-social-text: #dfe7e3;
    --luka-footer-border: rgba(200, 208, 215, 0.14);
  }
}

[data-theme="dark"] {
  --luka-bg: #171a1b;
  --luka-text: #ece7dc;
  --luka-accent: #c8d0d7;
  --luka-accent-soft: #2c3135;
  --luka-accent-muted: #9aa4ad;
  --luka-science-blue: #8ab7ca;
  --luka-science-blue-soft: #22333b;
  --luka-science-blue-border: rgba(138, 183, 202, 0.34);
  --luka-research-accent: #8fb0dd;
  --luka-research-soft: #1f2d42;
  --luka-research-border: rgba(143, 176, 221, 0.34);
  --luka-secondary: #a9afa7;
  --luka-border: rgba(200, 208, 215, 0.20);
  --luka-shadow: rgba(0, 0, 0, 0.32);
  --luka-social-bg: #202425;
  --luka-social-text: #dfe7e3;
  --luka-footer-border: rgba(200, 208, 215, 0.14);
}

[data-theme="light"] {
  --luka-bg: #ffffff;
  --luka-text: #202124;
  --luka-accent: #2f343a;
  --luka-accent-soft: #f0f1f2;
  --luka-accent-muted: #777d85;
  --luka-science-blue: rgb(22, 100, 192);
  --luka-science-blue-soft: #eef5ff;
  --luka-science-blue-border: rgba(22, 100, 192, 0.28);
  --luka-research-accent: rgb(18, 84, 168);
  --luka-research-soft: #eef5ff;
  --luka-research-border: rgba(18, 84, 168, 0.28);
  --luka-secondary: #555c64;
  --luka-border: rgba(47, 52, 58, 0.22);
  --luka-shadow: rgba(15, 23, 42, 0.08);
  --luka-social-bg: #ffffff;
  --luka-social-text: #4f555c;
  --luka-footer-border: rgba(15, 23, 42, 0.10);
}

body.theme-luka {
  background: var(--luka-bg);
  background-attachment: fixed;
  color: var(--luka-text);
  font-family: var(--luka-font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.72;
  transition: background-color 0.3s ease, color 0.3s ease;
}

[data-theme="dark"] body.theme-luka,
body.theme-luka[data-theme="dark"] {
  background: var(--luka-bg);
}

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: rgba(255, 255, 255, 0.88);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--luka-footer-border);
  z-index: 1000;
}

[data-theme="dark"] body.theme-luka .top-nav,
body.theme-luka[data-theme="dark"] .top-nav {
  background: rgba(23, 26, 27, 0.74);
}

body.theme-luka .nav-container {
  width: 100%;
  max-width: 1120px;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

body.theme-luka .nav-center {
  display: flex;
  gap: 6px;
  flex: 1;
  justify-content: center;
}

body.theme-luka .nav-center a {
  padding: 6px 12px;
  border-radius: 999px;
  color: var(--luka-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s ease, background-color 0.2s ease;
}

body.theme-luka .nav-center a:hover {
  color: var(--luka-accent);
  background: var(--luka-border);
  filter: none;
}

body.theme-luka .nav-center a.active {
  color: var(--luka-accent);
  background: var(--luka-border);
}

body.theme-luka .nav-right {
  display: flex;
  align-items: center;
  gap: 4px;
}

body.theme-luka .nav-menu-toggle {
  display: none;
  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 .nav-menu-toggle:hover {
  background: var(--luka-border);
  color: var(--luka-accent);
}

body.theme-luka .nav-left a {
  color: var(--luka-text);
  font-family: var(--luka-font-heading);
  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;
  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: 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 10px;
  text-align: center;
}

body.theme-luka .image.avatar {
  display: block;
  margin: 0 auto 28px;
}

body.theme-luka .image.avatar img {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 43%;
  padding: 4px;
  background:
    linear-gradient(var(--luka-bg), var(--luka-bg)) padding-box,
    linear-gradient(135deg, var(--luka-accent), rgba(138, 147, 157, 0.24)) border-box;
  border: 2px solid transparent;
  box-shadow: 0 8px 24px var(--luka-shadow);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}

body.theme-luka .image.avatar img:hover {
  transform: scale(1.03);
  box-shadow: 0 12px 30px var(--luka-shadow);
}

body.theme-luka .site-name {
  margin: 0 0 8px;
  color: var(--luka-text);
  font-family: var(--luka-font-heading);
  font-size: 32px;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.2;
}

body.theme-luka .site-email {
  margin: 0 0 24px;
  color: var(--luka-secondary);
  font-size: 13px;
  font-family: var(--luka-font-mono);
  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-science-blue) !important;
  border: 1px solid var(--luka-science-blue-border);
  box-shadow: 0 2px 8px rgba(34, 36, 38, 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-science-blue);
  color: #fff !important;
  transform: translateY(-2px);
}

body.theme-luka .visitor-card {
  margin: 36px auto 0;
  width: 280px;
  padding: 14px 14px 13px;
  border: 1px solid rgba(22, 100, 192, 0.18);
  border-radius: 12px;
  background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
  color: var(--luka-secondary);
  text-align: center;
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.06);
}

[data-theme="dark"] body.theme-luka .visitor-card,
body.theme-luka[data-theme="dark"] .visitor-card {
  border-color: rgba(138, 183, 202, 0.24);
  background: linear-gradient(180deg, #202425 0%, #1b232b 100%);
}

body.theme-luka .visitor-card-title {
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--luka-science-blue);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

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

body.theme-luka .research-map {
  width: 100%;
  aspect-ratio: 1 / 1;
  height: auto;
  min-height: 270px;
  border: 1px solid rgba(22, 100, 192, 0.18);
  border-radius: 10px;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 50% 15%, #0c1f3d 0%, #050a17 70%, #02040a 100%);
  position: relative;
  cursor: grab;
  touch-action: none;
}

body.theme-luka .research-map:active {
  cursor: grabbing;
}

[data-theme="dark"] body.theme-luka .research-map,
body.theme-luka[data-theme="dark"] .research-map {
  background:
    radial-gradient(120% 90% at 50% 15%, #0c1f3d 0%, #050a17 70%, #02040a 100%);
  border-color: rgba(138, 183, 202, 0.24);
}

body.theme-luka .research-map canvas {
  display: block;
  outline: none;
}

/* Subtle starfield overlay on top of gradient */
body.theme-luka .research-map::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,0.5), transparent 50%),
    radial-gradient(1px 1px at 70% 25%, rgba(255,255,255,0.4), transparent 50%),
    radial-gradient(1px 1px at 40% 75%, rgba(255,255,255,0.45), transparent 50%),
    radial-gradient(1px 1px at 85% 80%, rgba(255,255,255,0.35), transparent 50%),
    radial-gradient(1px 1px at 15% 85%, rgba(255,255,255,0.35), transparent 50%),
    radial-gradient(1px 1px at 60% 10%, rgba(255,255,255,0.35), transparent 50%);
  pointer-events: none;
  z-index: 0;
}

body.theme-luka .research-map-legend {
  position: absolute;
  left: 10px;
  bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--luka-font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(200, 220, 255, 0.65);
  pointer-events: none;
  z-index: 3;
}

body.theme-luka .research-map-legend-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #7cc8ff;
  box-shadow: 0 0 8px rgba(124, 200, 255, 0.9);
}

body.theme-luka .research-map-stats {
  position: absolute;
  right: 10px;
  bottom: 8px;
  font-family: var(--luka-font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  color: rgba(200, 220, 255, 0.55);
  pointer-events: none;
  z-index: 3;
}

body.theme-luka .research-globe-tooltip {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  background: rgba(8, 16, 30, 0.85);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(124, 200, 255, 0.35);
  border-radius: 8px;
  padding: 7px 11px;
  color: #e8f1ff;
  font-size: 11px;
  line-height: 1.4;
  max-width: 240px;
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 5;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

body.theme-luka .research-globe-tooltip.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

body.theme-luka .research-globe-tooltip strong {
  display: block;
  color: #7cc8ff;
  font-family: var(--luka-font-heading);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  margin-bottom: 2px;
}

body.theme-luka .research-globe-tooltip span.tt-sub {
  color: rgba(200, 220, 255, 0.7);
  font-size: 10px;
}

body.theme-luka .research-globe-tooltip span.tt-cta {
  display: block;
  margin-top: 4px;
  padding-top: 4px;
  border-top: 1px dashed rgba(124, 200, 255, 0.25);
  color: #7cc8ff;
  font-family: var(--luka-font-mono);
  font-size: 9.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

body.theme-luka .research-globe-tooltip span.tt-cta i {
  margin-left: 4px;
  font-size: 9px;
}

/* Expand (click-to-enlarge) button on the mini globe ---------------- */
body.theme-luka .research-map-expand {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 26px;
  height: 26px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(124, 200, 255, 0.35);
  border-radius: 6px;
  background: rgba(8, 16, 30, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  color: rgba(200, 220, 255, 0.9);
  font-size: 11px;
  cursor: pointer;
  z-index: 4;
  transition: background 0.18s ease, transform 0.18s ease, border-color 0.18s ease;
}

body.theme-luka .research-map-expand:hover,
body.theme-luka .research-map-expand:focus-visible {
  background: rgba(22, 100, 192, 0.75);
  border-color: rgba(124, 200, 255, 0.8);
  color: #fff;
  transform: scale(1.06);
  outline: none;
}

/* Enlarged-view modal / lightbox ----------------------------------- */
body.theme-luka .research-globe-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

body.theme-luka .research-globe-modal.visible {
  opacity: 1;
  pointer-events: auto;
}

body.theme-luka .research-globe-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(4, 8, 18, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

body.theme-luka .research-globe-modal-panel {
  position: relative;
  width: min(88vw, 880px);
  max-height: 90vh;
  padding: 22px 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  border-radius: 16px;
  border: 1px solid rgba(124, 200, 255, 0.22);
  background:
    radial-gradient(120% 90% at 50% 10%, #0c1f3d 0%, #050a17 70%, #02040a 100%);
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(124, 200, 255, 0.08) inset;
  transform: translateY(12px) scale(0.98);
  transition: transform 0.3s cubic-bezier(0.2, 0.7, 0.3, 1);
}

body.theme-luka .research-globe-modal.visible .research-globe-modal-panel {
  transform: translateY(0) scale(1);
}

body.theme-luka .research-globe-modal-title {
  color: #7cc8ff;
  font-family: var(--luka-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: center;
}

body.theme-luka .research-globe-modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 34px;
  height: 34px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(124, 200, 255, 0.3);
  border-radius: 50%;
  background: rgba(8, 16, 30, 0.7);
  color: rgba(220, 234, 253, 0.95);
  font-size: 14px;
  cursor: pointer;
  z-index: 2;
  transition: background 0.2s ease, transform 0.2s ease;
}

body.theme-luka .research-globe-modal-close:hover,
body.theme-luka .research-globe-modal-close:focus-visible {
  background: rgba(22, 100, 192, 0.8);
  transform: rotate(90deg);
  outline: none;
}

body.theme-luka .research-globe-modal-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  max-height: min(75vh, 760px);
  margin: 0 auto;
  border-radius: 12px;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 50% 15%, #0c1f3d 0%, #050a17 70%, #02040a 100%);
}

body.theme-luka .research-globe-modal-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 18% 24%, rgba(255,255,255,0.5), transparent 50%),
    radial-gradient(1.2px 1.2px at 62% 18%, rgba(255,255,255,0.5), transparent 50%),
    radial-gradient(1px 1px at 44% 78%, rgba(255,255,255,0.45), transparent 50%),
    radial-gradient(1px 1px at 82% 72%, rgba(255,255,255,0.4), transparent 50%),
    radial-gradient(1.4px 1.4px at 12% 88%, rgba(255,255,255,0.5), transparent 50%),
    radial-gradient(1px 1px at 74% 32%, rgba(255,255,255,0.4), transparent 50%),
    radial-gradient(1px 1px at 32% 12%, rgba(255,255,255,0.45), transparent 50%);
  pointer-events: none;
  z-index: 0;
}

body.theme-luka .research-globe-modal-canvas {
  position: absolute;
  inset: 0;
  cursor: grab;
  touch-action: none;
}

body.theme-luka .research-globe-modal-canvas:active {
  cursor: grabbing;
}

body.theme-luka .research-globe-modal-canvas canvas {
  display: block;
  outline: none;
}

body.theme-luka .research-globe-modal-hint {
  color: rgba(200, 220, 255, 0.55);
  font-family: var(--luka-font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-align: center;
}

body.theme-luka .research-globe-tooltip--modal {
  top: 14px;
  max-width: 320px;
  font-size: 12px;
}

body.research-modal-open {
  overflow: hidden;
}

body.theme-luka .research-map.research-map-failed {
  display: flex;
  align-items: center;
  justify-content: center;
}

body.theme-luka .research-map-shell {
  width: 100%;
  height: 100%;
  position: relative;
}

body.theme-luka .research-map-svg {
  width: 100%;
  height: 100%;
  display: block;
}

body.theme-luka .research-map-grid line {
  stroke: rgba(58, 111, 179, 0.12);
  stroke-width: 1;
}

[data-theme="dark"] body.theme-luka .research-map-grid line,
body.theme-luka[data-theme="dark"] .research-map-grid line {
  stroke: rgba(143, 176, 221, 0.1);
}

body.theme-luka .research-map-land path {
  fill: rgba(33, 95, 167, 0.16);
  stroke: rgba(33, 95, 167, 0.18);
  stroke-width: 1;
}

[data-theme="dark"] body.theme-luka .research-map-land path,
body.theme-luka[data-theme="dark"] .research-map-land path {
  fill: rgba(143, 176, 221, 0.12);
  stroke: rgba(143, 176, 221, 0.16);
}

body.theme-luka .research-map-route-glow {
  fill: none;
  stroke: rgba(124, 200, 255, 0.28);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: blur(2px);
}

body.theme-luka .research-map-route {
  fill: none;
  stroke: url(#researchRouteGradient);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 4 5;
}

body.theme-luka .research-markers-layer {
  position: absolute;
  inset: 0;
}

body.theme-luka .research-marker {
  position: absolute;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  transform: translate(-50%, -50%);
  text-decoration: none;
  z-index: 2;
}

body.theme-luka .research-marker:hover,
body.theme-luka .research-marker:focus-visible {
  z-index: 4;
  outline: none;
}

body.theme-luka .research-marker-core {
  position: relative;
  z-index: 2;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(180deg, #8fd0ff, #1670d2);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.9);
}

body.theme-luka .research-marker-ring {
  position: absolute;
  inset: 50% auto auto 50%;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(125, 198, 255, 0.42);
  background: rgba(125, 198, 255, 0.12);
  transform: translate(-50%, -50%);
  animation: researchMarkerPulse 2.8s ease-out infinite;
}

body.theme-luka .research-marker-label {
  position: absolute;
  left: 50%;
  top: 18px;
  transform: translateX(-50%);
  padding: 3px 7px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: #1f3856;
  font-family: var(--luka-font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.12);
}

[data-theme="dark"] body.theme-luka .research-marker-label,
body.theme-luka[data-theme="dark"] .research-marker-label {
  background: rgba(19, 29, 40, 0.92);
  color: #dceafd;
}

body.theme-luka .research-marker-tooltip {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 10px);
  width: 180px;
  padding: 10px 11px;
  display: grid;
  gap: 4px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.96);
  color: var(--luka-text);
  transform: translateX(-50%) translateY(4px);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.18);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

[data-theme="dark"] body.theme-luka .research-marker-tooltip,
body.theme-luka[data-theme="dark"] .research-marker-tooltip {
  background: rgba(20, 30, 40, 0.96);
}

body.theme-luka .research-marker:hover .research-marker-tooltip,
body.theme-luka .research-marker:focus-visible .research-marker-tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

body.theme-luka .research-marker-tooltip strong {
  font-size: 12px;
  line-height: 1.35;
}

body.theme-luka .research-marker-tooltip span {
  color: var(--luka-secondary);
  font-size: 11px;
  line-height: 1.4;
}

body.theme-luka .research-marker-links {
  color: var(--luka-science-blue) !important;
  font-weight: 600;
}

body.theme-luka .map-caption {
  margin: 10px 0 0;
  color: #52616b;
  font-size: 12px;
  line-height: 1.45;
  text-align: center;
}

@keyframes researchMarkerPulse {
  0% {
    transform: translate(-50%, -50%) scale(0.76);
    opacity: 0.7;
  }
  70% {
    transform: translate(-50%, -50%) scale(1.08);
    opacity: 0;
  }
  100% {
    transform: translate(-50%, -50%) scale(1.08);
    opacity: 0;
  }
}

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

body.theme-luka .section {
  margin-bottom: 44px;
  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 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--luka-accent);
  color: var(--luka-text);
  font-family: var(--luka-font-heading);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.25;
}

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(47, 52, 58, 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 #news .section-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

body.theme-luka #news .timeline-item {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 14px;
  margin-left: 0;
  padding: 10px 0 10px 16px;
  border-left: 2px solid var(--luka-border);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

body.theme-luka #news .timeline-item:hover {
  border-left-color: var(--luka-accent);
  transform: translateX(2px);
}

body.theme-luka #news .timeline-item::before,
body.theme-luka #news .timeline-item::after {
  display: none;
}

body.theme-luka #news .timeline-item p {
  margin: 0;
}

body.theme-luka #news .exp-period {
  padding-top: 2px;
  font-family: var(--luka-font-mono);
  letter-spacing: 0;
  white-space: nowrap;
}

body.theme-luka #news .news-archive {
  margin-left: 0;
}

body.theme-luka #news .news-archive summary {
  width: fit-content;
  margin: 4px 0 8px;
  padding: 3px 0;
}

body.theme-luka .experience-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

body.theme-luka #education .section-body {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

body.theme-luka #education .card {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--luka-footer-border);
}

body.theme-luka #education .card:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

body.theme-luka #education .experience-item {
  gap: 18px;
}

body.theme-luka #education .institution-logo {
  margin-top: 2px;
}

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

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

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

body.theme-luka .exp-title {
  font-size: 16.5px;
  color: var(--luka-text);
}

body.theme-luka .exp-detail {
  font-size: 15.5px;
  color: var(--luka-secondary);
}

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

body.theme-luka .exp-location {
  color: var(--luka-secondary);
  font-size: 13px;
  font-weight: 400;
}

body.theme-luka .project-card {
  font-size: 16.5px;
  line-height: 1.7;
  margin-bottom: 14px;
}

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

body.theme-luka .publications ol.bibliography li {
  margin-bottom: 18px;
  padding: 16px 0 16px 18px;
  border-left: 4px solid var(--luka-research-accent);
}

body.theme-luka .pub-row-with-cover {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 168px;
  align-items: stretch;
  gap: 24px;
}

body.theme-luka .pub-cover {
  display: block;
  justify-self: end;
  align-self: stretch;
  width: 168px;
  min-height: 100%;
  overflow: hidden;
  border: 1px solid var(--luka-research-border);
  border-radius: 8px;
  background: var(--luka-research-soft);
  line-height: 0;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

body.theme-luka .pub-cover:hover {
  border-color: var(--luka-research-accent);
  transform: translateY(-1px);
}

body.theme-luka .pub-cover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

body.theme-luka .pub-content .title {
  margin-bottom: 7px;
  color: var(--luka-text);
  font-family: var(--luka-font-heading);
  font-size: 18.5px;
  font-weight: 600;
  line-height: 1.38;
  letter-spacing: 0;
}

body.theme-luka .pub-content .author {
  margin-bottom: 6px;
  color: var(--luka-secondary);
  font-size: 15.5px;
  line-height: 1.55;
}

body.theme-luka .pub-content .periodical {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
  color: var(--luka-secondary);
  font-size: 14px;
}

body.theme-luka .pub-content .periodical .journal {
  color: var(--luka-text);
  font-style: normal;
  font-weight: 600;
}

body.theme-luka .pub-content .periodical .meta-dot {
  color: var(--luka-accent-muted);
}

body.theme-luka .pub-content .periodical .year {
  display: inline;
  padding: 0;
  border: 0;
  border-radius: 0;
  color: var(--luka-research-accent);
  font-family: var(--luka-font-mono);
  font-size: 12px;
  font-weight: 500;
}

body.theme-luka .pub-content .links a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin: 2px 7px 0 0;
  padding: 3px 9px;
  border: 1px solid var(--luka-research-border);
  border-radius: 999px;
  background: var(--luka-research-soft);
  color: var(--luka-research-accent);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.4;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

body.theme-luka .pub-content .links a:hover {
  background: var(--luka-research-accent);
  border-color: var(--luka-research-accent);
  color: #fff;
  filter: none;
  transform: translateY(-1px);
}

body.theme-luka .pub-content .links i {
  font-size: 10px;
}

body.theme-luka details summary {
  cursor: pointer;
  color: var(--luka-accent);
  font-size: 13px;
  font-weight: 500;
  margin: 4px 0 14px;
}

body.theme-luka .news-archive,
body.theme-luka .talk-archive {
  margin-left: 20px;
}

body.theme-luka .talk-item {
  margin-bottom: 12px;
  padding: 14px 16px;
  border: 1px solid rgba(47, 52, 58, 0.20);
  border-left: 4px solid var(--luka-research-accent);
  border-radius: 10px;
  background: var(--luka-social-bg);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

body.theme-luka .talk-item:hover {
  border-color: var(--luka-research-accent);
  box-shadow: 0 6px 18px rgba(47, 52, 58, 0.10);
  transform: translateY(-1px);
}

body.theme-luka .talk-item .exp-period {
  margin-bottom: 5px;
  font-family: var(--luka-font-mono);
  letter-spacing: 0;
}

body.theme-luka .talk-item .exp-title {
  margin-bottom: 4px;
}

body.theme-luka .talk-item .exp-detail {
  line-height: 1.6;
}

body.theme-luka .talk-archive {
  margin-left: 0;
  margin-top: 4px;
}

body.theme-luka .talk-archive summary {
  width: fit-content;
  margin: 4px 0 10px;
}

body.theme-luka .awards-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

body.theme-luka .award-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 4px 0;
}

body.theme-luka .award-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-top: 1px;
  border-radius: 50%;
  background: var(--luka-accent-soft);
  color: var(--luka-accent);
  font-size: 14px;
  line-height: 1;
}

body.theme-luka .award-trophy {
  background: #fff7e6;
  color: #b7791f;
  border: 1px solid rgba(183, 121, 31, 0.28);
}

body.theme-luka .award-plane {
  background: #eef5ff;
  color: rgb(22, 100, 192);
  border: 1px solid rgba(22, 100, 192, 0.28);
}

body.theme-luka .award-fellowship {
  background: #f4f1fb;
  color: #6b5ca5;
  border: 1px solid rgba(107, 92, 165, 0.28);
}

[data-theme="dark"] body.theme-luka .award-trophy,
body.theme-luka[data-theme="dark"] .award-trophy {
  background: rgba(183, 121, 31, 0.16);
  color: #e4b45d;
}

[data-theme="dark"] body.theme-luka .award-plane,
body.theme-luka[data-theme="dark"] .award-plane {
  background: rgba(138, 183, 202, 0.16);
  color: #8ab7ca;
}

[data-theme="dark"] body.theme-luka .award-fellowship,
body.theme-luka[data-theme="dark"] .award-fellowship {
  background: rgba(154, 139, 205, 0.16);
  color: #b8afe8;
}

body.theme-luka .award-text {
  color: var(--luka-text);
  font-size: 15.5px;
  line-height: 1.55;
}

body.theme-luka .award-date {
  display: inline-block;
  margin-left: 8px;
  color: var(--luka-accent-muted);
  font-size: 13.5px;
  font-weight: 600;
}

body.theme-luka .award-sub {
  color: var(--luka-secondary);
  font-size: 14.5px;
}

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 .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);
}

/* ===== News type icons ===== */
body.theme-luka #news .news-type {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--luka-accent-soft);
  color: var(--luka-accent);
  font-size: 10px;
  vertical-align: -4px;
}

body.theme-luka #news .news-paper .news-type {
  background: var(--luka-science-blue-soft);
  color: var(--luka-science-blue);
}
body.theme-luka #news .news-award .news-type {
  background: #fff7e6;
  color: #b7791f;
}
body.theme-luka #news .news-travel .news-type {
  background: #eef5ff;
  color: rgb(22, 100, 192);
}
body.theme-luka #news .news-milestone .news-type {
  background: #f4f1fb;
  color: #6b5ca5;
}

body.theme-luka #news .news-key {
  color: var(--luka-text);
  font-style: normal;
  font-weight: 600;
  background: linear-gradient(180deg, transparent 72%, rgba(22, 100, 192, 0.10) 72%);
  padding: 0 2px;
  border-radius: 2px;
}

body.theme-luka #news a.news-key {
  color: var(--luka-science-blue);
}

[data-theme="dark"] body.theme-luka #news .news-award .news-type,
body.theme-luka[data-theme="dark"] #news .news-award .news-type {
  background: rgba(183, 121, 31, 0.16);
  color: #e4b45d;
}
[data-theme="dark"] body.theme-luka #news .news-travel .news-type,
body.theme-luka[data-theme="dark"] #news .news-travel .news-type {
  background: rgba(138, 183, 202, 0.16);
  color: #8ab7ca;
}
[data-theme="dark"] body.theme-luka #news .news-milestone .news-type,
body.theme-luka[data-theme="dark"] #news .news-milestone .news-type {
  background: rgba(154, 139, 205, 0.16);
  color: #b8afe8;
}

/* ===== Research project cards ===== */
body.theme-luka .project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

body.theme-luka .card.project-card {
  display: block;
  padding: 16px 0 16px 18px;
  border: 0;
  border-left: 4px solid var(--luka-research-accent);
  border-radius: 0;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  transition: border-color 0.2s ease, background-color 0.2s ease;
  margin-bottom: 0;
  font-size: 15px;
  line-height: 1.65;
}

[data-theme="dark"] body.theme-luka .card.project-card,
body.theme-luka[data-theme="dark"] .card.project-card {
  background: transparent;
  border-left-color: var(--luka-research-accent);
  box-shadow: none;
}

body.theme-luka .card.project-card:hover {
  border-left-color: var(--luka-science-blue);
  background: linear-gradient(90deg, rgba(18, 84, 168, 0.055), transparent 72%);
}

[data-theme="dark"] body.theme-luka .card.project-card:hover,
body.theme-luka[data-theme="dark"] .card.project-card:hover {
  border-left-color: var(--luka-science-blue);
  background: linear-gradient(90deg, rgba(124, 200, 255, 0.08), transparent 72%);
}

body.theme-luka .project-content {
  min-width: 0;
}

body.theme-luka .project-title {
  margin: 0 0 7px;
  font-family: var(--luka-font-heading);
  font-size: 18.5px;
  font-weight: 700;
  color: var(--luka-text);
  line-height: 1.35;
}

[data-theme="dark"] body.theme-luka .project-title,
body.theme-luka[data-theme="dark"] .project-title {
  color: var(--luka-text);
  text-shadow: none;
}

body.theme-luka .project-description {
  margin: 0 0 9px;
  color: #34383d;
  font-size: 16px;
  line-height: 1.68;
}

[data-theme="dark"] body.theme-luka .project-description,
body.theme-luka[data-theme="dark"] .project-description {
  color: var(--luka-secondary);
  font-weight: 400;
  letter-spacing: 0;
}

body.theme-luka .project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

body.theme-luka .project-tags .tag {
  display: inline-flex;
  align-items: center;
  padding: 1px 9px;
  border: 1px solid rgba(63, 82, 107, 0.22);
  border-radius: 999px;
  background: transparent;
  color: var(--luka-research-accent);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

[data-theme="dark"] body.theme-luka .project-tags .tag,
body.theme-luka[data-theme="dark"] .project-tags .tag {
  background: var(--luka-accent-soft);
  border-color: rgba(143, 176, 221, 0.18);
  color: var(--luka-research-accent);
}

[data-theme="dark"] body.theme-luka .map-caption,
body.theme-luka[data-theme="dark"] .map-caption {
  color: #b8c7d4;
}

/* ===== About tagline + focus tags ===== */
body.theme-luka .about-tagline {
  position: relative;
  margin: 4px 0 18px;
  padding: 2px 0 2px 18px;
  border-left: 3px solid var(--luka-accent);
  font-family: var(--luka-font-heading);
  font-size: 19px;
  font-weight: 500;
  font-style: normal;
  line-height: 1.45;
  color: var(--luka-text);
  letter-spacing: 0;
}

body.theme-luka .about-tagline em {
  font-style: normal;
  color: var(--luka-science-blue);
  font-weight: 600;
  background: linear-gradient(180deg, transparent 65%, rgba(22, 100, 192, 0.13) 65%);
  padding: 0 2px;
  border-radius: 2px;
}

body.theme-luka .typewriter-text {
  white-space: normal;
}

body.theme-luka .typewriter-cursor {
  display: inline-block;
  width: 2px;
  height: 1.05em;
  margin-left: 3px;
  background: var(--luka-science-blue);
  transform: translateY(0.14em);
  animation: typewriterBlink 0.9s steps(2, start) infinite;
}

body.theme-luka .typewriter-complete .typewriter-cursor {
  animation-duration: 1.15s;
  opacity: 0.55;
}

body.theme-luka .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes typewriterBlink {
  0%, 45% { opacity: 1; }
  46%, 100% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  body.theme-luka .typewriter-cursor {
    display: none;
  }
}

body.theme-luka #about .section-body > p:not(.about-tagline) {
  margin: 0 0 12px;
  font-size: 17px;
  line-height: 1.78;
}

body.theme-luka #about .section-body p:not(.about-tagline) strong {
  font-weight: 600;
  color: var(--luka-science-blue);
  background: linear-gradient(180deg, transparent 78%, rgba(22, 100, 192, 0.12) 78%);
  padding: 0 2px;
  border-radius: 2px;
}

/* ===== Publication author badges ===== */
body.theme-luka .pub-badge {
  display: inline-flex;
  align-items: center;
  padding: 1px 7px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.5;
}

body.theme-luka .pub-badge.badge-first {
  background: var(--luka-research-accent);
  color: #fff;
  border: 1px solid var(--luka-research-accent);
}

body.theme-luka .pub-badge.badge-equal {
  background: var(--luka-research-soft);
  color: var(--luka-research-accent);
  border: 1px solid var(--luka-research-border);
}

body.theme-luka .pub-badge.badge-cover {
  background: rgba(22, 100, 192, 0.10);
  color: var(--luka-science-blue);
  border: 1px solid rgba(22, 100, 192, 0.22);
}

body.theme-luka .pub-badge.badge-corresponding {
  background: var(--luka-research-soft);
  color: var(--luka-secondary);
  border: 1px solid var(--luka-research-border);
}

/* ===== Back-to-top button ===== */
body.theme-luka .back-to-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--luka-border);
  border-radius: 50%;
  background: var(--luka-social-bg);
  color: var(--luka-accent);
  font-size: 15px;
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  box-shadow: 0 8px 20px var(--luka-shadow);
  transition: opacity 0.25s ease, transform 0.25s ease, background-color 0.2s ease, color 0.2s ease;
  z-index: 1000;
}

body.theme-luka .back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

body.theme-luka .back-to-top:hover {
  background: var(--luka-accent);
  color: #fff;
}

/* ===== Scroll offset for fixed nav when clicking anchor links ===== */
body.theme-luka .section {
  scroll-margin-top: 80px;
}

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

  body.theme-luka .nav-center {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 4px;
    padding: 10px 20px 14px;
    background: var(--luka-bg);
    border-bottom: 1px solid var(--luka-footer-border);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    transition: max-height 0.25s ease, opacity 0.2s ease;
  }

  body.theme-luka .nav-center.open {
    max-height: 400px;
    opacity: 1;
    pointer-events: auto;
  }

  body.theme-luka .nav-center a {
    padding: 10px 12px;
    border-radius: 8px;
    text-align: left;
  }

  body.theme-luka .nav-menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  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: 176px;
    height: 176px;
  }

  body.theme-luka .site-name {
    font-size: 28px;
  }

  body.theme-luka .section-title {
    font-size: 27px;
  }

  body.theme-luka .card.project-card {
    padding: 14px 0 14px 14px;
  }

  body.theme-luka .back-to-top {
    right: 18px;
    bottom: 18px;
    width: 40px;
    height: 40px;
  }

  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 .publications ol.bibliography li {
    padding: 14px 0 14px 14px;
    border-left-width: 3px;
  }

  body.theme-luka .pub-row-with-cover {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  body.theme-luka .pub-cover {
    display: none;
  }
}

@media (max-width: 480px) {
  body.theme-luka .research-map {
    height: 154px;
  }

  body.theme-luka .research-marker-label {
    font-size: 8px;
    padding: 2px 6px;
  }

  body.theme-luka .section {
    margin-bottom: 32px;
  }

  body.theme-luka .section-title {
    font-size: 25px;
  }

  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: 15px;
  }

}