:root {
  color-scheme: dark light;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #2d2c30;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.65;
}

.site-shell {
  --bg: #2d2c30;
  --surface: #353438;
  --ink: #f6f3f0;
  --ink-soft: #cbc6c2;
  --accent: #ff8b78;
  --accent-strong: #ffb0a2;
  --rule: #515055;
  --portrait-bg: #403e42;

  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
}

.site-shell:has(#theme-toggle:not(:checked)) {
  --bg: #fdfbf9;
  --surface: #f4efec;
  --ink: #343236;
  --ink-soft: #625d60;
  --accent: #a21c1d;
  --accent-strong: #7f1113;
  --rule: #e2dcda;
  --portrait-bg: #f2ece9;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-underline-offset: 0.2em;
  transition: color 150ms ease;
}

a:hover {
  color: var(--ink-soft);
  text-decoration-thickness: 2px;
}

a:focus-visible,
.theme-toggle:has(input:focus-visible) {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 30;
  padding: 10px 14px;
  transform: translateY(-160%);
  border: 1px solid #ff8b78;
  background: #2d2c30;
  color: #ffffff;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 60px;
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
}

.header-inner,
.content,
.site-footer {
  width: 100%;
  margin-inline: auto;
  padding-inline: clamp(22px, 4vw, 64px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 60px;
}

.header-name {
  flex: 0 0 auto;
  color: var(--ink);
  font-size: 1.08rem;
  font-weight: 650;
  text-decoration: none;
  cursor: pointer;
}

.header-name:hover {
  color: var(--ink);
  text-decoration: none;
}

.header-actions,
nav {
  display: flex;
  align-items: center;
}

.header-actions {
  gap: clamp(12px, 2vw, 28px);
}

nav {
  gap: clamp(14px, 2.4vw, 38px);
}

nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--ink);
  text-decoration: none;
}

nav a:hover {
  color: var(--ink);
  text-decoration: underline;
}

.theme-toggle {
  position: relative;
  display: inline-grid;
  width: 44px;
  height: 44px;
  cursor: pointer;
  place-items: center;
}

.theme-toggle input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.theme-icon {
  grid-area: 1 / 1;
  font-size: 1.45rem;
  line-height: 1;
}

.theme-icon-moon {
  display: none;
}

.theme-toggle:has(input:not(:checked)) .theme-icon-sun {
  display: none;
}

.theme-toggle:has(input:not(:checked)) .theme-icon-moon {
  display: block;
}

section,
#content,
#research,
#teaching {
  scroll-margin-top: 88px;
}

.content {
  padding-block: clamp(38px, 4.5vw, 64px) 58px;
}

.profile-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: clamp(42px, 5vw, 72px);
  align-items: start;
}

.profile {
  position: sticky;
  top: 92px;
}

.portrait-wrap {
  width: min(100%, 210px);
  margin-bottom: 20px;
}

.portrait-wrap img {
  width: 210px;
  height: auto;
  aspect-ratio: 1;
  object-fit: cover;
  border: 2px solid #ffffff;
  border-radius: 50%;
  background: var(--portrait-bg);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.24);
  color: transparent;
  font-size: 0;
}

.site-shell:has(#theme-toggle:not(:checked)) .portrait-wrap img {
  box-shadow: 0 0 0 1px rgba(52, 50, 54, 0.2);
}

.profile-name {
  margin: 0 0 6px;
  font-size: 1.35rem;
  font-weight: 650;
}

.profile-role {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.45;
}

.profile-details {
  display: grid;
  gap: 0;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
}

.profile-detail {
  position: relative;
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  min-height: 32px;
  margin: 0;
}

.profile-details a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

.detail-icon,
.detail-mark {
  display: inline-grid;
  width: 22px;
  height: 22px;
  color: var(--ink-soft);
  place-items: center;
}

.detail-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.detail-mark {
  border: 1px solid currentColor;
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1;
}

.email-copy {
  position: relative;
  width: max-content;
  min-height: 32px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  cursor: pointer;
}

.email-copy:hover {
  color: var(--ink-soft);
  text-decoration-thickness: 2px;
}

.email-copy:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.email-tooltip {
  position: absolute;
  bottom: calc(100% + 7px);
  left: 0;
  z-index: 12;
  width: max-content;
  max-width: min(290px, calc(100vw - 36px));
  padding: 7px 10px;
  visibility: hidden;
  border: 1px solid var(--rule);
  background: var(--surface);
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 400;
  line-height: 1.35;
  text-align: left;
  text-decoration: none;
  opacity: 0;
  pointer-events: none;
}

.email-copy:hover .email-tooltip,
.email-copy:focus-visible .email-tooltip,
.email-copy.is-copied .email-tooltip {
  visibility: visible;
  opacity: 1;
}

.main-column {
  min-width: 0;
}

.cv-section {
  min-width: 0;
}

.cv-frame {
  display: block;
  width: 100%;
  height: calc(100vh - 178px);
  min-height: 720px;
  border: 1px solid var(--rule);
  background: #ffffff;
}

.cv-fallback {
  padding: 28px;
  background: var(--surface);
  color: var(--ink-soft);
}

.cv-fallback p {
  margin: 0;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 20px;
  color: var(--ink);
  font-size: clamp(1.95rem, 2.7vw, 2.8rem);
  font-weight: 650;
  line-height: 1.05;
  letter-spacing: -0.035em;
}

.welcome {
  padding-bottom: clamp(36px, 4.5vw, 58px);
}

.welcome p {
  margin-bottom: 18px;
  color: var(--ink-soft);
  font-size: clamp(1.03rem, 1.18vw, 1.14rem);
  line-height: 1.62;
}

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

.research,
.teaching {
  padding-top: clamp(34px, 4vw, 50px);
  border-top: 1px solid var(--rule);
}

.teaching {
  margin-top: clamp(34px, 4vw, 50px);
  padding-bottom: 8px;
}

h2 {
  margin-bottom: 24px;
  color: var(--ink);
  font-size: clamp(1.7rem, 2.4vw, 2.35rem);
  font-weight: 650;
  line-height: 1.15;
  letter-spacing: -0.025em;
}

article {
  padding-block: 28px 36px;
  border-top: 1px solid var(--rule);
}

.paper-heading {
  margin-bottom: 18px;
}

h3 {
  margin-bottom: 8px;
  color: var(--ink);
  font-size: clamp(1.18rem, 1.45vw, 1.38rem);
  font-weight: 650;
  line-height: 1.42;
}

.jmp-badge {
  display: inline-block;
  margin-left: 7px;
  padding: 3px 8px;
  vertical-align: middle;
  background: var(--accent);
  color: var(--bg);
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.35;
}

.paper-status {
  margin-bottom: 6px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.paper-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.paper-note {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.abstract {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.72;
}

.award-line {
  margin: 22px 0 0;
  padding-left: 15px;
  border-left: 2px solid var(--accent);
  font-size: 0.95rem;
}

.award-line a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--ink);
}

.award-line a:hover {
  color: var(--ink-soft);
}

.teaching-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--rule);
}

.teaching-entry {
  padding: 26px 28px 28px 0;
  border-top: 0;
}

.teaching-entry:first-child {
  grid-column: 1 / -1;
  padding-right: 0;
  border-bottom: 1px solid var(--rule);
}

.teaching-entry:nth-child(3) {
  padding-right: 0;
  padding-left: 28px;
  border-left: 1px solid var(--rule);
}

.teaching-level {
  margin-bottom: 8px;
  color: var(--ink-soft);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.teaching-meta {
  margin-bottom: 15px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.teaching-topics {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
  line-height: 1.68;
}

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

.teaching-evaluations {
  margin: 8px 0 20px;
  padding: 14px 0 14px 16px;
  border-left: 2px solid var(--accent);
  color: var(--ink-soft);
}

.teaching-evaluations a {
  color: var(--ink);
}

.site-footer {
  padding-block: 26px 34px;
  border-top: 1px solid var(--rule);
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.site-footer p {
  margin: 0;
}

.address-copy {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: copy;
}

.address-copy:hover {
  color: var(--ink);
}

.address-copy:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.address-feedback {
  margin-left: 0.4em;
  color: var(--ink);
  font-weight: 600;
}

@media (max-width: 900px) {
  .profile-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 34px;
  }

  .profile {
    top: 82px;
  }

  .portrait-wrap img {
    width: 190px;
  }
}

@media (max-width: 720px) {
  .site-header,
  .header-inner {
    height: 56px;
  }

  .header-inner,
  .content,
  .site-footer {
    padding-inline: 18px;
  }

  .header-inner {
    gap: 10px;
  }

  .header-actions {
    gap: 6px;
  }

  nav {
    gap: 8px;
    font-size: 0.8rem;
  }

  .theme-toggle {
    width: 40px;
    height: 44px;
  }

  .header-name {
    font-size: 0.94rem;
  }

  section,
  #content,
  #research,
  #teaching {
    scroll-margin-top: 76px;
  }

  .content {
    padding-block: 34px 48px;
  }

  .profile-layout {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .profile {
    position: static;
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    column-gap: 24px;
    align-items: start;
  }

  .portrait-wrap {
    grid-row: 1 / span 3;
    width: 150px;
    margin-bottom: 0;
  }

  .portrait-wrap img {
    width: 150px;
  }

  .profile-name,
  .profile-role,
  .profile-details {
    grid-column: 2;
  }

  .profile-details {
    margin-top: 12px;
    padding-top: 10px;
  }

  .welcome {
    padding-bottom: 42px;
  }

  .email-tooltip {
    right: 0;
    left: auto;
  }

  .cv-frame {
    height: 72vh;
    min-height: 520px;
  }

  .teaching-list {
    grid-template-columns: 1fr;
  }

  .teaching-entry,
  .teaching-entry:first-child,
  .teaching-entry:nth-child(3) {
    grid-column: auto;
    padding: 24px 0 27px;
    border-left: 0;
    border-bottom: 0;
  }

  .teaching-entry + .teaching-entry {
    border-top: 1px solid var(--rule);
  }
}

@media (max-width: 520px) {
  .header-inner {
    padding-inline: 14px;
  }

  .header-name {
    max-width: 78px;
    line-height: 1.1;
  }

  nav {
    gap: 4px;
    font-size: 0.72rem;
  }

  .theme-toggle {
    width: 34px;
  }

  .theme-icon {
    font-size: 1.25rem;
  }

  .profile {
    grid-template-columns: 112px minmax(0, 1fr);
    column-gap: 18px;
  }

  .portrait-wrap {
    width: 112px;
  }

  .portrait-wrap img {
    width: 112px;
  }

  .profile-name {
    font-size: 1.18rem;
  }

  .profile-role {
    font-size: 0.95rem;
  }

  .profile-details {
    font-size: 0.95rem;
  }

  .welcome p {
    font-size: 1.02rem;
  }
}

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

  a {
    transition: none;
  }
}