:root {
  --bg: #f4f8fb;
  --bg-elevated: rgba(244, 248, 251, 0.92);
  --ink: #172633;
  --ink-soft: #3f5466;
  --muted: #6a7f90;
  --line: rgba(23, 38, 51, 0.12);
  --accent: #3a7ca5;
  --accent-soft: rgba(58, 124, 165, 0.12);
  --accent-strong: #2a5f80;
  --glow-a: rgba(58, 124, 165, 0.18);
  --glow-b: rgba(150, 175, 190, 0.16);
  --shadow: 0 18px 50px rgba(23, 38, 51, 0.08);
  --radius: 14px;
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Source Sans 3", system-ui, sans-serif;
  --max: 960px;
  --header-h: 4.25rem;
  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #1a222a;
  --bg-elevated: rgba(26, 34, 42, 0.94);
  --ink: #e8eef2;
  --ink-soft: #b4c2ce;
  --muted: #8a9aab;
  --line: rgba(232, 238, 242, 0.12);
  --accent: #7eb6d6;
  --accent-soft: rgba(126, 182, 214, 0.16);
  --accent-strong: #a6d0e6;
  --glow-a: rgba(126, 182, 214, 0.12);
  --glow-b: rgba(100, 130, 160, 0.08);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.22);
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 0.2s ease, opacity 0.2s ease;
}

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

img {
  max-width: 100%;
}

.bg-atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 70% 45% at 12% -10%, var(--glow-a), transparent 60%),
    radial-gradient(ellipse 55% 40% at 95% 8%, var(--glow-b), transparent 55%),
    radial-gradient(ellipse 50% 35% at 80% 90%, var(--glow-a), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg) 100%);
}

.bg-atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.45'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: var(--header-h);
  padding: 0.75rem clamp(1.25rem, 4vw, 2.5rem);
  background: var(--bg-elevated);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.brand-mark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

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

.nav {
  display: none;
  gap: 1.15rem;
  margin-left: auto;
  margin-right: 0.5rem;
}

.nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

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

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.header-controls {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.nav + .header-controls {
  margin-left: 0.35rem;
}

.brand-smile {
  color: var(--accent);
  font-weight: 600;
  margin-left: 0.15rem;
}

.hero__aside {
  display: none;
}

.content-grid {
  display: contents;
}

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

.theme-toggle:active {
  transform: scale(0.96);
}

.theme-toggle__icon--sun {
  display: none;
}

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

[data-theme="dark"] .theme-toggle__icon--sun {
  display: block;
}

main {
  width: min(100% - 2.5rem, var(--max));
  margin: 0 auto;
  padding-bottom: 4rem;
}

.hero {
  padding: clamp(3.5rem, 12vw, 6.5rem) 0 clamp(3rem, 8vw, 4.5rem);
}

.hero__hi {
  margin: 0 0 0.35rem;
  min-height: 1.4em;
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--muted);
}

.hero__name {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 4.75rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.hero__cursor {
  display: inline-block;
  width: 0.08em;
  height: 1em;
  margin-left: 0.08em;
  vertical-align: -0.1em;
  background: currentColor;
  opacity: 0;
}

.hero__cursor.is-active {
  opacity: 1;
  animation: blink-cursor 0.85s steps(1) infinite;
}

.hero__name .hero__cursor {
  height: 0.85em;
  vertical-align: 0.05em;
}

.hero__face {
  display: inline-block;
  margin-left: 0.35rem;
  color: var(--accent);
  font-weight: 600;
  opacity: 0;
  transform: translateY(0.15em) scale(0.7);
  transition: opacity 0.35s ease, transform 0.45s cubic-bezier(0.34, 1.45, 0.64, 1);
}

.hero__face.is-visible {
  opacity: 1;
  transform: none;
}

@keyframes blink-cursor {
  50% {
    opacity: 0;
  }
}

.hero__lead {
  margin: 0 0 2rem;
  max-width: 38rem;
  font-size: 1.15rem;
  color: var(--ink-soft);
}

.hero__lead strong {
  color: var(--ink);
  font-weight: 600;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0.65rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--accent-strong);
  color: #fff;
}

[data-theme="dark"] .btn--primary {
  color: #10201b;
}

[data-theme="dark"] .btn--primary:hover {
  color: #10201b;
}

.btn--ghost {
  border: 1px solid var(--line);
  color: var(--ink);
  background: transparent;
}

.btn--ghost:hover {
  border-color: transparent;
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.section {
  padding: 2.75rem 0;
  border-top: 1px solid var(--line);
}

.section__label {
  margin-bottom: 0.65rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.section__title {
  margin: 0 0 1.35rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.prose p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

.prose p:last-child {
  margin-bottom: 0;
}

.timeline-item__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.timeline-item__role {
  font-weight: 600;
  color: var(--ink);
}

.timeline-item__when {
  font-size: 0.92rem;
  color: var(--muted);
}

.timeline-item__place {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
}

.timeline-item__desc {
  margin: 0;
  color: var(--ink-soft);
}

.edu-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.35rem;
}

.edu-item__status {
  display: inline-block;
  margin-bottom: 0.4rem;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent-strong);
  background: var(--accent-soft);
}

.edu-item__status--done {
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
}

.edu-item__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-bottom: 0.25rem;
}

.edu-item__meta .cv-entry__role {
  margin: 0;
}

.edu-item__when {
  font-size: 0.92rem;
  color: var(--muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.edu-item__degree {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
}

.edu-item__degree a {
  color: inherit;
  text-decoration: none;
}

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

.edu-item__school {
  margin: 0;
  color: var(--ink-soft);
}

.pub__venue {
  margin: 0 0 0.4rem;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--accent);
}

.pub__title {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.3;
}

.pub__title a {
  color: var(--ink);
  text-decoration: none;
}

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

.pub__authors {
  margin: 0 0 0.85rem;
  color: var(--ink-soft);
}

.pub__abstract {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

.pub__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.pub__links a {
  font-weight: 600;
  text-decoration: none;
  color: var(--accent-strong);
}

.pub__links a:hover {
  text-decoration: underline;
}

.link-row {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.link-chip {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--ink);
  background: color-mix(in srgb, var(--bg) 70%, white 30%);
  box-shadow: var(--shadow);
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

[data-theme="dark"] .link-chip {
  background: color-mix(in srgb, var(--bg) 80%, white 8%);
}

.link-chip:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  color: var(--ink);
}

.link-chip__label {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 600;
}

.link-chip__hint {
  font-size: 0.92rem;
  color: var(--muted);
}

.icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  opacity: 0.85;
}

.site-footer {
  width: min(100% - 2.5rem, var(--max));
  margin: 0 auto;
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.hero .reveal:nth-child(1) { transition-delay: 0.05s; }
.hero .reveal:nth-child(2) { transition-delay: 0.14s; }
.hero .reveal:nth-child(3) { transition-delay: 0.23s; }
.hero .reveal:nth-child(4) { transition-delay: 0.32s; }

@media (min-width: 760px) {
  .nav {
    display: flex;
  }

  .link-row {
    grid-template-columns: 1fr 1fr;
  }
}

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

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn:hover,
  .link-chip:hover,
  .theme-toggle:active {
    transform: none;
  }
}

/* CV page */
.cv-page {
  width: min(100% - 2.5rem, var(--max));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.cv-page__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.25rem;
}

.cv-intro {
  display: block;
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--line);
}

.cv-intro__photo {
  display: none;
}

.cv-intro__name {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 5vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.cv-intro__role {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.icon-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1rem;
}

.icon-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

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

.cv-section {
  padding: 1.75rem 0;
  border-top: 1px solid var(--line);
}

.cv-section__title {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.cv-entry {
  margin: 0 0 1.25rem;
}

.cv-entry:last-child {
  margin-bottom: 0;
}

.cv-entry__org,
.cv-entry__line,
.cv-entry__desc,
.cv-entry__role {
  margin: 0 0 0.2rem;
}

.cv-entry__org {
  color: var(--ink-soft);
}

.cv-entry__line {
  color: var(--muted);
}

.cv-entry__desc {
  color: var(--ink-soft);
  margin: 0.35rem 0 0.4rem;
}

.cv-entry__role {
  font-weight: 600;
  color: var(--ink);
}

.cv-entry__sep {
  color: var(--muted);
  padding: 0 0.15rem;
}

.cv-list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--ink-soft);
}

.cv-list li {
  margin: 0.35rem 0;
}

.cv-list strong {
  color: var(--ink);
}

.nav a[aria-current="page"] {
  color: var(--accent);
}

@media (max-width: 560px) {
  .cv-intro {
    display: block;
  }
}

/* ========== Bright layout: wider, playful, different distribution ========== */
[data-style="bright"] {
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Source Sans 3", system-ui, sans-serif;
  --max: 1100px;
  --accent: #2f7f9e;
  --accent-soft: rgba(47, 127, 158, 0.14);
  --accent-strong: #1f5f78;
  --glow-a: rgba(47, 127, 158, 0.2);
  --glow-b: rgba(232, 168, 96, 0.18);
  --radius: 22px;
}

[data-theme="dark"][data-style="bright"] {
  --accent: #7ec4dd;
  --accent-soft: rgba(126, 196, 221, 0.16);
  --accent-strong: #b0dced;
  --glow-a: rgba(126, 196, 221, 0.14);
  --glow-b: rgba(232, 168, 96, 0.1);
}

[data-style="bright"] main {
  width: min(100% - 2rem, var(--max));
}

[data-style="bright"] .site-footer {
  width: min(100% - 2rem, var(--max));
}

[data-style="bright"] .site-header {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

[data-style="bright"] .hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem 2rem;
  padding: clamp(2.5rem, 8vw, 4.5rem) 0 2.5rem;
  position: relative;
}

[data-style="bright"] .hero__hi {
  font-size: 1.35rem;
}

[data-style="bright"] .brand-smile {
  display: inline-block;
  transform: rotate(-8deg);
}

[data-style="bright"] .hero__name {
  font-size: clamp(2.25rem, 6.5vw, 3.5rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
  max-width: 14ch;
}

[data-style="bright"] .hero__name::after {
  content: "";
  display: block;
  width: min(12rem, 55%);
  height: 0.55rem;
  margin-top: 0.55rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--glow-b) 80%, var(--accent)));
  opacity: 0;
  transform: scaleX(0.4);
  transform-origin: left center;
  transition: opacity 0.4s ease, transform 0.45s ease;
}

[data-style="bright"] .hero__name.is-underlined::after {
  opacity: 1;
  transform: scaleX(1);
}

[data-style="bright"] .hero__lead {
  font-size: 1.2rem;
  max-width: 34rem;
}

[data-style="bright"] .hero__aside {
  display: block;
  padding: 1.1rem 1.2rem;
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--bg) 40%, white 60%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  max-width: 18rem;
}

[data-theme="dark"][data-style="bright"] .hero__aside {
  background: color-mix(in srgb, var(--bg) 70%, white 10%);
}

[data-style="bright"] .hero__aside-label {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

[data-style="bright"] .hero__aside-text {
  margin: 0.15rem 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

[data-style="bright"] .content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

[data-style="bright"] .content-grid .section {
  border-top: none;
  padding: 1.4rem 1.35rem 1.55rem;
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--bg) 55%, white 45%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

[data-theme="dark"][data-style="bright"] .content-grid .section {
  background: color-mix(in srgb, var(--bg) 78%, white 8%);
}

[data-style="bright"] .section__title {
  font-size: clamp(1.45rem, 3vw, 1.85rem);
}

[data-style="bright"] .section--contact {
  margin-top: 1.25rem;
  border-top: none;
  padding: 1.6rem 0 0;
}

[data-style="bright"] .link-row {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

[data-style="bright"] .link-chip {
  flex-direction: column;
  align-items: flex-start;
  gap: 0.35rem;
  border-radius: 18px;
  border: none;
  background: var(--accent-soft);
  box-shadow: none;
  min-height: 5.2rem;
  justify-content: center;
}

[data-style="bright"] .link-chip:hover {
  transform: translateY(-3px) rotate(-0.4deg);
  background: color-mix(in srgb, var(--accent-soft) 70%, var(--accent) 30%);
}

[data-style="bright"] .btn--primary {
  box-shadow: 0 12px 28px color-mix(in srgb, var(--accent) 30%, transparent);
}

[data-style="bright"] .pub__venue {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  background: var(--accent-soft);
}

@media (min-width: 900px) {
  [data-style="bright"] .hero {
    grid-template-columns: minmax(0, 1.35fr) minmax(14rem, 0.65fr);
    align-items: end;
  }

  [data-style="bright"] .hero__hi,
  [data-style="bright"] .hero__name,
  [data-style="bright"] .hero__lead,
  [data-style="bright"] .hero__actions {
    grid-column: 1;
  }

  [data-style="bright"] .hero__aside {
    grid-column: 2;
    grid-row: 1 / span 4;
    align-self: center;
    justify-self: end;
  }

  [data-style="bright"] .content-grid {
    grid-template-columns: 0.78fr 1.22fr;
    grid-template-areas:
      "about experience"
      "about education"
      "publications publications";
    gap: 1.15rem;
  }

  [data-style="bright"] #about { grid-area: about; }
  [data-style="bright"] #experience { grid-area: experience; }
  [data-style="bright"] #education { grid-area: education; }
  [data-style="bright"] #publications { grid-area: publications; }
}