/* ==========================================================================
   OpenAI-style visual layer for the Typst-generated site.
   Keeps the Tufted article and margin-note structure, replaces the visual tone.
   ========================================================================== */

:root {
  color-scheme: light;
  --oa-bg: #f7f7f4;
  --oa-surface: rgba(255, 255, 255, 0.76);
  --oa-text: #111111;
  --oa-muted: rgba(0, 0, 0, 0.58);
  --oa-faint: rgba(0, 0, 0, 0.36);
  --oa-line: rgba(0, 0, 0, 0.12);
  --oa-line-soft: rgba(0, 0, 0, 0.07);
  --oa-hover: rgba(0, 0, 0, 0.045);
  --oa-link: #5f43d6;
  --oa-code-bg: #f1f1ee;
  --oa-font: "OpenAI Sans", "Inter", "SF Pro Text", "Helvetica Neue", Arial,
    "PingFang SC", "Hiragino Sans GB", sans-serif;
  --oa-mono: "SFMono-Regular", "Cascadia Code", Menlo, Consolas, monospace;
  --oa-main-width: 720px;
  --oa-page-width: 1180px;
}

html,
body,
:root {
  background: var(--oa-bg) !important;
  color: var(--oa-text) !important;
}

html {
  font-size: 17px;
  scroll-behavior: smooth;
}

body {
  width: auto !important;
  max-width: none !important;
  min-height: 100vh;
  margin: 0 !important;
  padding: 0 !important;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(247, 247, 244, 0.94)),
    var(--oa-bg) !important;
  color: var(--oa-text) !important;
  font-family: var(--oa-font) !important;
  font-feature-settings: "kern" 1, "liga" 1;
  font-kerning: normal;
  letter-spacing: 0 !important;
  line-height: 1.68;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body * {
  box-sizing: border-box;
}

.site-header:empty {
  display: none !important;
}

.site-header,
nav,
.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  width: 100%;
  margin: 0 !important;
  padding: 0 !important;
  background: rgba(247, 247, 244, 0.78) !important;
  border-bottom: 1px solid var(--oa-line-soft) !important;
  backdrop-filter: blur(20px) saturate(1.08);
  -webkit-backdrop-filter: blur(20px) saturate(1.08);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.4vw, 36px);
  max-width: var(--oa-page-width);
  margin: 0 auto !important;
  min-height: 58px;
  padding: 0 clamp(22px, 4vw, 56px) !important;
}

.site-nav a,
nav a {
  color: var(--oa-muted) !important;
  font-family: var(--oa-font) !important;
  font-size: 0.94rem;
  font-weight: 560;
  letter-spacing: -0.012em;
  margin: 0 !important;
  text-decoration: none !important;
  transition: color 140ms ease;
}

.site-nav a:first-child {
  color: var(--oa-text) !important;
}

.site-nav a:hover,
nav a:hover {
  color: var(--oa-text) !important;
}

article {
  max-width: var(--oa-page-width);
  margin: 0 auto !important;
  padding: clamp(54px, 7vw, 96px) clamp(22px, 4vw, 56px) 112px !important;
}

article > section {
  position: relative;
  width: min(100%, var(--oa-main-width));
  max-width: var(--oa-main-width);
}

p,
li,
dd,
dt {
  color: var(--oa-text) !important;
  font-family: var(--oa-font) !important;
  font-size: 1.04rem;
  font-weight: 400;
  line-height: 1.72;
}

p {
  margin: 1.05em 0 !important;
}

ul,
ol {
  margin: 1.05em 0 1.35em !important;
  padding-left: 1.25em !important;
}

li {
  margin: 0.38em 0 !important;
  padding-left: 0.1em;
}

li::marker {
  color: var(--oa-faint);
}

h1,
h2,
h3,
h4,
h5,
h6,
h1 a,
h2 a {
  border: 0 !important;
  color: var(--oa-text) !important;
  font-family: var(--oa-font) !important;
  font-weight: 560 !important;
  letter-spacing: -0.052em !important;
  line-height: 1.02 !important;
  text-wrap: balance;
}

h1 {
  font-size: clamp(3.6rem, 7vw, 7.2rem) !important;
  margin: 0 0 clamp(38px, 6vw, 82px) !important;
}

h2 {
  font-size: clamp(2.05rem, 3vw, 3.1rem) !important;
  margin: clamp(46px, 6vw, 82px) 0 0.58em !important;
}

h3 {
  font-size: clamp(1.45rem, 1.8vw, 2rem) !important;
  margin: clamp(34px, 4.6vw, 58px) 0 0.65em !important;
}

h4,
h5,
h6 {
  font-size: 1.12rem !important;
  letter-spacing: -0.025em !important;
  margin: 2em 0 0.65em !important;
}

a,
a code {
  color: var(--oa-link) !important;
  text-decoration: underline !important;
  text-decoration-color: rgba(95, 67, 214, 0.32) !important;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover,
a:hover code {
  color: #2f1f86 !important;
  text-decoration-color: rgba(47, 31, 134, 0.55) !important;
}

strong,
b {
  color: var(--oa-text) !important;
  font-weight: 650 !important;
}

em,
i {
  color: #4d83b9 !important;
}

hr {
  border: 0 !important;
  border-top: 1px solid var(--oa-line) !important;
  margin: clamp(44px, 6vw, 80px) 0 !important;
}

blockquote {
  margin: 1.6em 0 !important;
  padding: 0.1em 0 0.1em 1.1em !important;
  border-left: 3px solid rgba(0, 0, 0, 0.16) !important;
  color: var(--oa-muted) !important;
}

blockquote p {
  color: var(--oa-muted) !important;
}

code,
pre {
  font-family: var(--oa-mono) !important;
}

code {
  background: rgba(95, 67, 214, 0.08) !important;
  border-radius: 5px;
  color: #3f327d !important;
  font-size: 0.88em;
  padding: 0.12em 0.34em;
}

pre {
  overflow-x: auto;
  margin: 1.45em 0 !important;
  padding: 1.05em 1.15em !important;
  background: var(--oa-code-bg) !important;
  border: 1px solid var(--oa-line-soft) !important;
  border-radius: 10px !important;
  color: #242424 !important;
}

pre code {
  background: transparent !important;
  border-radius: 0;
  color: inherit !important;
  padding: 0;
}

img,
svg,
figure {
  max-width: 100%;
  height: auto;
  background: var(--oa-surface) !important;
  border: 1px solid var(--oa-line-soft) !important;
  border-radius: 12px !important;
  padding: 0 !important;
}

figure {
  margin: 2em 0 !important;
  overflow: hidden;
}

figure img,
figure svg {
  border: 0 !important;
  border-radius: 0 !important;
}

table {
  width: 100%;
  margin: 1.8em 0 !important;
  border-collapse: collapse;
  font-size: 0.96rem;
}

th,
td {
  border-bottom: 1px solid var(--oa-line-soft);
  padding: 0.72em 0.8em 0.72em 0;
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--oa-text);
  font-weight: 620;
}

.research-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(22px, 3vw, 34px);
  margin: 1.6em 0 clamp(48px, 6vw, 82px);
  width: min(100%, 980px);
}

.research-card {
  display: flex;
  flex-direction: column;
  gap: 0.9em;
  min-width: 0;
  padding: clamp(18px, 2.2vw, 28px);
  background: rgba(255, 255, 255, 0.58) !important;
  border: 1px solid var(--oa-line-soft);
  border-radius: 14px;
  color: inherit !important;
  text-decoration: none !important;
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.research-card:hover {
  border-color: rgba(25, 25, 25, 0.2);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.07);
  transform: translateY(-2px);
}

.research-card:focus-visible {
  outline: 2px solid rgba(116, 91, 255, 0.42);
  outline-offset: 4px;
}

.research-eyebrow {
  color: var(--oa-muted) !important;
  font-family: var(--oa-font) !important;
  font-size: 0.82rem;
  font-weight: 620;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.research-card strong {
  display: block;
  color: var(--oa-text) !important;
  font-family: var(--oa-font) !important;
  font-size: clamp(1.15rem, 1.35vw, 1.48rem);
  font-weight: 590 !important;
  letter-spacing: -0.035em;
  line-height: 1.13;
}

.research-card p {
  color: var(--oa-muted) !important;
  font-size: 0.96rem;
  line-height: 1.55;
  margin: 0 !important;
}

.research-card img,
.research-card svg {
  display: block;
  width: 100%;
  margin-top: auto;
  background: #fff !important;
  border: 1px solid var(--oa-line-soft) !important;
  border-radius: 10px !important;
}

.research-image-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: auto;
}

.publication-item {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  gap: clamp(16px, 2.6vw, 40px);
  padding: clamp(18px, 2.2vw, 28px) 0;
  border-bottom: 1px solid var(--oa-line-soft);
  color: var(--oa-text) !important;
  font-family: var(--oa-font) !important;
  line-height: 1.5;
}

h3 + .publication-item {
  border-top: 1px solid var(--oa-line);
  margin-top: 1em;
}

.publication-index {
  color: var(--oa-muted) !important;
  font-size: 0.96rem;
  font-weight: 560;
  letter-spacing: -0.012em;
}

.publication-body {
  color: var(--oa-text) !important;
  font-size: clamp(0.98rem, 1.05vw, 1.1rem);
  letter-spacing: -0.014em;
}

.publication-body em {
  color: var(--oa-muted) !important;
}

.publication-me {
  color: var(--oa-text) !important;
  font-weight: 680;
}

.publication-journal {
  color: var(--oa-muted) !important;
  font-style: italic;
}

.publication-doi {
  display: block;
  margin-top: 0.45em;
  color: var(--oa-muted) !important;
  font-size: 0.88rem;
}

.footnote-ref,
.footnote-ref-link {
  color: var(--oa-link) !important;
  font-weight: 560;
  text-decoration: none !important;
}

.marginnote,
.margin-note,
aside,
.sidebar {
  color: var(--oa-muted) !important;
  font-family: var(--oa-font) !important;
  font-size: 0.88rem !important;
  font-weight: 400;
  letter-spacing: -0.008em;
  line-height: 1.55 !important;
}

.marginnote a,
.margin-note a,
aside a,
.sidebar a {
  color: var(--oa-link) !important;
}

.marginnote img,
.margin-note img,
aside img,
.sidebar img {
  display: block !important;
  width: 100% !important;
  max-width: 100% !important;
  background: #fff !important;
  border: 1px solid var(--oa-line-soft) !important;
  border-radius: 14px !important;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.08);
}

@media (min-width: 1080px) {
  .marginnote,
  .margin-note,
  aside,
  .sidebar {
    float: right !important;
    clear: right !important;
    position: relative !important;
    width: clamp(260px, 26vw, 360px) !important;
    margin-right: clamp(-430px, -34vw, -330px) !important;
    margin-top: 0.2em !important;
    margin-bottom: 1.6em !important;
    padding: 0 !important;
    border: 0 !important;
    background: transparent !important;
  }
}

@media (max-width: 1079px) {
  article {
    max-width: 820px;
  }

  article > section {
    max-width: none;
    width: 100%;
  }

  .marginnote,
  .margin-note,
  aside,
  .sidebar {
    display: block !important;
    float: none !important;
    clear: both !important;
    width: 100% !important;
    margin: 1.4em 0 !important;
    padding: 1em !important;
    background: rgba(255, 255, 255, 0.58) !important;
    border: 1px solid var(--oa-line-soft) !important;
    border-radius: 12px !important;
  }
}

@media (max-width: 680px) {
  html {
    font-size: 16px;
  }

  .site-nav {
    gap: 16px;
    min-height: 54px;
    overflow-x: auto;
    padding-inline: 18px !important;
    white-space: nowrap;
  }

  article {
    padding: 42px 20px 80px !important;
  }

  h1 {
    font-size: clamp(2.7rem, 16vw, 4.2rem) !important;
    letter-spacing: -0.058em !important;
  }

  .research-cards,
  .publication-item {
    grid-template-columns: 1fr;
  }

  .publication-item {
    gap: 0.35em;
  }
}