/* Sunfield — editorial light theme (distinct from night / terminal look) */

:root {
  --paper: #f3ece2;
  --paper-deep: #e8dfd2;
  --cream: #fffcf7;
  --ink: #1a1814;
  --ink-soft: #44403b;
  --muted: #78716b;
  --accent: #c45c26;
  --accent-deep: #9a3412;
  --accent-mint: #0d9488;
  --shadow: rgba(26, 24, 20, 0.08);
  --shadow-warm: rgba(196, 92, 38, 0.12);
  --font-display: "Fraunces", "Georgia", serif;
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Consolas", monospace;
  --radius: 14px;
  --radius-lg: 22px;
  --header-h: 3.75rem;
  --maxw: 48rem;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
  scroll-behavior: smooth;
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body.theme-sunfield {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.92rem + 0.25vw, 1.07rem);
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.88em;
}

/* Background: warm paper, soft blooms, halftone dots, corner arc */
.bg-editorial {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.bg-wash {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 120% 80% at 100% -20%, rgba(196, 92, 38, 0.11), transparent 55%),
    radial-gradient(ellipse 90% 60% at -10% 100%, rgba(13, 148, 136, 0.08), transparent 50%),
    linear-gradient(168deg, var(--paper) 0%, var(--paper-deep) 45%, #ebe3d6 100%);
}

.bg-bloom {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  will-change: transform;
}

.bg-bloom--a {
  width: min(70vw, 520px);
  height: min(70vw, 520px);
  top: -15%;
  right: -20%;
  background: radial-gradient(circle, rgba(251, 191, 36, 0.35), transparent 65%);
  animation: sunfield-float-a 38s ease-in-out infinite alternate;
}

.bg-bloom--b {
  width: min(55vw, 420px);
  height: min(55vw, 420px);
  bottom: 10%;
  left: -15%;
  background: radial-gradient(circle, rgba(13, 148, 136, 0.22), transparent 70%);
  animation: sunfield-float-b 44s ease-in-out infinite alternate;
}

@keyframes sunfield-float-a {
  0% {
    transform: translate(0, 0) scale(1);
  }
  100% {
    transform: translate(-4%, 6%) scale(1.06);
  }
}

@keyframes sunfield-float-b {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(8%, -4%) scale(1.05);
  }
}

.bg-dots {
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: radial-gradient(rgba(26, 24, 20, 0.07) 1px, transparent 1px);
  background-size: 14px 14px;
  mask-image: radial-gradient(ellipse 75% 65% at 50% 35%, black 15%, transparent 72%);
}

.bg-arc {
  position: absolute;
  top: -40%;
  left: 50%;
  width: 140vmax;
  height: 140vmax;
  transform: translateX(-50%);
  border-radius: 50%;
  border: 1px solid rgba(26, 24, 20, 0.06);
  pointer-events: none;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--cream);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.85rem;
  z-index: 1000;
  border-radius: 6px;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 252, 247, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(26, 24, 20, 0.07);
}

.header-inner {
  max-width: calc(var(--maxw) + 5rem);
  margin: 0 auto;
  padding: 0 1.25rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.12em;
  color: var(--accent-deep);
  text-decoration: none;
  text-transform: uppercase;
}

.logo-cursor {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(26, 24, 20, 0.12);
  border-radius: 10px;
  background: var(--cream);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: var(--ink);
  border-radius: 1px;
  transition: transform var(--ease) 0.2s;
}

.site-header.nav-open .nav-toggle-bar:first-child {
  transform: translateY(4px) rotate(45deg);
}

.site-header.nav-open .nav-toggle-bar:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

.site-nav .nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 1.35rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.4rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent-deep);
}

.site-nav a.is-active {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

.theme-switch {
  flex-shrink: 0;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  border: 1px solid rgba(26, 24, 20, 0.12);
  background: var(--cream);
  box-shadow: 0 1px 3px var(--shadow);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.theme-switch:hover,
.theme-switch:focus-visible {
  color: var(--accent-deep);
  border-color: rgba(196, 92, 38, 0.35);
  box-shadow: 0 2px 8px var(--shadow-warm);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(255, 252, 247, 0.97);
    border-bottom: 1px solid rgba(26, 24, 20, 0.07);
    padding: 1rem 1.25rem 1.25rem;
    display: none;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav .nav-list {
    flex-direction: column;
    gap: 0;
  }

  .site-nav a {
    display: block;
    padding: 0.65rem 0;
    border-bottom: 1px solid rgba(26, 24, 20, 0.06);
  }

  .theme-switch {
    margin-left: auto;
    margin-right: 0.35rem;
  }
}

main {
  padding-bottom: 4rem;
}

.section {
  padding: 3.25rem 1.25rem;
}

.section-inner {
  max-width: var(--maxw);
  margin: 0 auto;
}

.section-title {
  display: flex;
  flex-direction: column-reverse;
  align-items: flex-start;
  gap: 0.35rem;
  margin: 0 0 0.25rem;
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.section-label {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 1.2rem + 2.2vw, 2.65rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.section-rule {
  width: 3.5rem;
  height: 4px;
  margin: 0 0 1.65rem;
  background: linear-gradient(90deg, var(--accent), rgba(196, 92, 38, 0.35));
  border-radius: 2px;
}

.section-lead {
  margin: -0.25rem 0 1.35rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.5;
}

/* Hero */
.hero {
  padding: clamp(2.75rem, 7vw, 4.75rem) 1.25rem 2.75rem;
  border-bottom: none;
  position: relative;
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(26, 24, 20, 0.1) 20%, rgba(26, 24, 20, 0.1) 80%, transparent);
}

.hero-inner {
  max-width: calc(var(--maxw) + 5rem);
  margin: 0 auto;
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(140px, 240px);
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: center;
}

.hero-photo-wrap {
  justify-self: end;
  position: relative;
}

.hero-photo-wrap::before {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: calc(var(--radius-lg) + 4px);
  background: linear-gradient(135deg, rgba(196, 92, 38, 0.2), rgba(13, 148, 136, 0.15));
  z-index: -1;
  transform: rotate(-2deg);
}

.hero-photo {
  display: block;
  width: 100%;
  max-width: 228px;
  aspect-ratio: 1;
  object-fit: cover;
  object-position: center 22%;
  border-radius: var(--radius-lg);
  border: 3px solid var(--cream);
  box-shadow:
    0 12px 40px var(--shadow),
    0 2px 0 rgba(255, 255, 255, 0.8) inset;
  transform: rotate(-1.5deg);
}

.hero-main {
  min-width: 0;
  padding-left: clamp(0rem, 2vw, 0.5rem);
  border-left: 4px solid var(--accent);
  padding-top: 0.25rem;
  padding-bottom: 0.25rem;
}

.hero-prompt {
  display: none;
}

.hero-name {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 1.4rem + 2.8vw, 3.1rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--ink);
}

.hero-role {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-soft);
  line-height: 1.55;
}

.hero-role-sub {
  color: var(--muted);
  font-weight: 400;
}

.hero-tagline {
  min-height: 1.55em;
  margin: 0 0 1.5rem;
  padding-left: 0.85rem;
  border-left: 3px solid var(--accent-mint);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.02rem;
  font-weight: 400;
  color: var(--accent-deep);
  line-height: 1.45;
}

.hero-tagline::after {
  content: none;
}

.hero-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.link-chip {
  display: inline-block;
  padding: 0.5rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-soft);
  text-decoration: none;
  background: var(--cream);
  border: 1px solid rgba(26, 24, 20, 0.1);
  border-radius: 999px;
  box-shadow: 0 2px 6px var(--shadow);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.link-chip:hover,
.link-chip:focus-visible {
  color: var(--accent-deep);
  border-color: rgba(196, 92, 38, 0.35);
  transform: translateY(-1px);
}

@media (max-width: 700px) {
  .hero-layout {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }

  .hero-main {
    border-left: none;
    padding-left: 0;
    border-top: 4px solid var(--accent);
    padding-top: 1.25rem;
  }

  .hero-photo-wrap {
    justify-self: center;
  }

  .hero-photo {
    max-width: min(210px, 74vw);
    transform: rotate(-1deg);
  }

  .hero-tagline {
    text-align: left;
    margin-left: auto;
    margin-right: auto;
    max-width: 28rem;
  }

  .hero-links {
    justify-content: center;
  }
}

/* Research */
.research-body p {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.02rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

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

/* Publications */
.section--pubs {
  background: linear-gradient(180deg, rgba(255, 252, 247, 0.5) 0%, rgba(232, 223, 210, 0.35) 50%, transparent 100%);
  border-radius: 0;
}

.pub-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: pub;
}

.pub-card {
  counter-increment: pub;
  margin-bottom: 1.1rem;
}

.pub-card article {
  position: relative;
  padding: 1.25rem 1.25rem 1.25rem 2.85rem;
  background: var(--cream);
  border: 1px solid rgba(26, 24, 20, 0.08);
  border-radius: var(--radius);
  box-shadow: 0 4px 20px var(--shadow);
  transition: box-shadow 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.pub-card article::before {
  content: counter(pub, decimal-leading-zero);
  position: absolute;
  left: 1rem;
  top: 1.15rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  font-style: italic;
  color: rgba(196, 92, 38, 0.45);
}

.pub-card article:hover,
.pub-card article:focus-within {
  border-color: rgba(196, 92, 38, 0.25);
  box-shadow: 0 8px 32px var(--shadow-warm);
  transform: translateY(-2px);
}

.pub-title {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 600;
  line-height: 1.38;
  color: var(--ink);
}

.pub-title a {
  color: inherit;
  text-decoration: none;
  border-bottom: 2px solid rgba(196, 92, 38, 0.25);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.pub-title a:hover,
.pub-title a:focus-visible {
  color: var(--accent-deep);
  border-bottom-color: var(--accent);
}

.pub-meta-link {
  color: var(--accent-mint);
  text-decoration: none;
  font-weight: 600;
}

.pub-meta-link:hover,
.pub-meta-link:focus-visible {
  text-decoration: underline;
}

.pub-authors {
  margin: 0 0 0.45rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.pub-venue {
  margin: 0;
  font-size: 0.82rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.22rem 0.5rem;
  border-radius: 4px;
}

.badge--conf {
  background: rgba(13, 148, 136, 0.12);
  color: var(--accent-mint);
  border: 1px solid rgba(13, 148, 136, 0.28);
}

.badge--arxiv {
  background: rgba(120, 113, 107, 0.1);
  color: var(--ink-soft);
  border: 1px solid rgba(26, 24, 20, 0.12);
}

.badge--journal {
  background: rgba(196, 92, 38, 0.1);
  color: var(--accent-deep);
  border: 1px solid rgba(196, 92, 38, 0.22);
}

.badge--oral {
  background: rgba(124, 58, 237, 0.08);
  color: #6d28d9;
  border: 1px solid rgba(124, 58, 237, 0.2);
}

.badge--review {
  background: rgba(217, 119, 6, 0.1);
  color: #b45309;
  border: 1px solid rgba(217, 119, 6, 0.25);
}

.venue-name {
  font-weight: 600;
  color: var(--ink);
}

.venue-meta {
  color: var(--muted);
  font-size: 0.82em;
}

/* Timeline */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: 1.1rem;
  padding-bottom: 1.85rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 18px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(var(--accent), rgba(196, 92, 38, 0.15));
  border-radius: 1px;
}

.timeline-marker {
  width: 14px;
  height: 14px;
  margin-top: 0.4rem;
  background: var(--accent);
  border: 3px solid var(--cream);
  border-radius: 50%;
  box-shadow: 0 0 0 1px rgba(196, 92, 38, 0.35);
  z-index: 1;
}

.timeline-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.75rem;
  margin-bottom: 0.25rem;
}

.timeline-head h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--ink);
}

.timeline-head time {
  color: var(--muted);
  font-size: 0.78rem;
}

.timeline-dash {
  color: var(--muted);
}

.timeline-sub {
  margin: 0.35rem 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.timeline-detail {
  margin: 0 0 0.35rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.timeline-detail a {
  color: var(--accent-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.timeline-detail a:hover,
.timeline-detail a:focus-visible {
  color: var(--accent-mint);
}

.muted {
  color: var(--muted);
  font-size: 0.87rem;
}

/* Awards */
.awards-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.awards-list li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px dashed rgba(26, 24, 20, 0.12);
  font-size: 0.94rem;
}

.awards-list li:first-child {
  padding-top: 0;
}

.award-title {
  flex: 1 1 12rem;
  color: var(--ink-soft);
}

.award-meta {
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 0.75rem;
  white-space: nowrap;
}

@media (max-width: 520px) {
  .award-meta {
    white-space: normal;
  }
}

/* Service */
.service-list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--ink-soft);
}

.service-list li {
  margin-bottom: 0.55rem;
}

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

/* Skills */
.skills-grid {
  margin: 0;
  display: grid;
  gap: 1.1rem;
}

@media (min-width: 600px) {
  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  }
}

.skill-block {
  padding: 1.15rem 1.2rem;
  background: var(--cream);
  border: 1px solid rgba(26, 24, 20, 0.08);
  border-radius: var(--radius);
  box-shadow: 0 3px 14px var(--shadow);
}

.skill-block dt {
  margin: 0 0 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.skill-block dd {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

/* Footer */
.site-footer {
  border-top: 3px double rgba(26, 24, 20, 0.12);
  padding: 1.75rem 1.25rem 2.5rem;
  background: transparent;
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  text-align: center;
}

.footer-copy {
  margin: 0;
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-style: italic;
  color: var(--muted);
}