:root {
  color-scheme: light dark;

  /*
    Layout tokens (px): keep “magic numbers” here.
    Rationale: edit these once; the rest of the CSS should mostly reference variables.
  */
  --space: 12px; /* Base spacing unit. Prefer deriving other layout sizes from this. */

  --wrap: 860px; /* Max content width (readable line length). */
  --gutter: calc(var(--space) * 2); /* Wrap gutter (total left+right). */
  --icon-size: 36px; /* Standard UI icon size (links, small controls). */
  
  --border: 1px; /* Default separator/border thickness. Keep literal (not derived). */
  --radius: 24px; /* Default corner radius (24px). */
  --radius-sm: 8px; /* Small radius (8px). */
  --line-height: 1.6; /* Paragraph line height for readability. */
  --weight-regular: 400; /* Regular text weight for nav/brand. */
  --weight-bold: 700; /* Bold text weight for publication titles/meta. */

  --focus-outline: 2px; /* Keyboard focus ring thickness. Keep literal. */
  --focus-offset: 2px; /* Space between focus ring and element. Keep literal. */

  --link-underline: 1px; /* Default underline thickness. Keep literal (not derived). */
  --link-underline-hover: 1px; /* Underline thickness on hover. Keep literal. */
  --link-underline-offset: 1px; /* Underline offset. Keep literal. */

  --profile-card-width: 224px; /* Width of the photo+icons block. */
  --profile-text-width: 400px; /* Text column width before wrapping. */
  --profile-gap: calc(var(--space) * 2); /* Gap between photo block and text column. */
  --profile-card-padding: 0px; /* Inner padding around photo + icons inside the profile card. */
  --profile-photo-radius: var(--radius); /* Photo rounding radius (x). Keep this the base value. */

  /* Matcha Azul palette */
  --light-Canvas: #f7f7f7;
  --light-CanvasText: #2b2f3b;
  --light-AccentColor: #3498db;
  --light-AccentColorText: #ffffff;
  --light-ButtonFace: #ffffff;
  --light-ButtonText: #2b2f3b;
  --light-ButtonBorder: rgba(0, 0, 0, 0.15);
  --light-Field: #ffffff;
  --light-FieldText: #2e313d;
  --light-GrayText: rgba(43, 47, 59, 0.55);
  --light-Highlight: #3498db;
  --light-HighlightText: #ffffff;
  --light-SelectedItem: #3498db;
  --light-SelectedItemText: #ffffff;
  --light-LinkText: #217dbb;
  --light-VisitedText: #23252e;
  --light-ActiveText: #217dbb;
  --light-MarkMix: 18%;

  --dark-Canvas: #1b1d24;
  --dark-CanvasText: #bbc3c8;
  --dark-AccentColor: #3498db;
  --dark-AccentColorText: #ffffff;
  --dark-ButtonFace: #22252c;
  --dark-ButtonText: #bbc3c8;
  --dark-ButtonBorder: rgba(0, 0, 0, 0.25);
  --dark-Field: #22252c;
  --dark-FieldText: #afb4ba;
  --dark-GrayText: rgba(187, 195, 200, 0.45);
  --dark-Highlight: #3498db;
  --dark-HighlightText: #ffffff;
  --dark-SelectedItem: #3498db;
  --dark-SelectedItemText: #ffffff;
  --dark-LinkText: #8bc4ea;
  --dark-VisitedText: #caced2;
  --dark-ActiveText: #8bc4ea;
  --dark-MarkMix: 22%;

  --Canvas: var(--light-Canvas);
  --CanvasText: var(--light-CanvasText);
  --AccentColor: var(--light-AccentColor);
  --AccentColorText: var(--light-AccentColorText);
  --ButtonFace: var(--light-ButtonFace);
  --ButtonText: var(--light-ButtonText);
  --ButtonBorder: var(--light-ButtonBorder);
  --Field: var(--light-Field);
  --FieldText: var(--light-FieldText);
  --GrayText: var(--light-GrayText);
  --Highlight: var(--light-Highlight);
  --HighlightText: var(--light-HighlightText);
  --SelectedItem: var(--light-SelectedItem);
  --SelectedItemText: var(--light-SelectedItemText);
  --LinkText: var(--light-LinkText);
  --VisitedText: var(--light-VisitedText);
  --ActiveText: var(--light-ActiveText);
  --MarkMix: var(--light-MarkMix);
  --Mark: color-mix(in srgb, var(--AccentColor) var(--MarkMix), var(--Canvas));
  --MarkText: var(--CanvasText);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --Canvas: var(--dark-Canvas);
    --CanvasText: var(--dark-CanvasText);
    --AccentColor: var(--dark-AccentColor);
    --AccentColorText: var(--dark-AccentColorText);
    --ButtonFace: var(--dark-ButtonFace);
    --ButtonText: var(--dark-ButtonText);
    --ButtonBorder: var(--dark-ButtonBorder);
    --Field: var(--dark-Field);
    --FieldText: var(--dark-FieldText);
    --GrayText: var(--dark-GrayText);
    --Highlight: var(--dark-Highlight);
    --HighlightText: var(--dark-HighlightText);
    --SelectedItem: var(--dark-SelectedItem);
    --SelectedItemText: var(--dark-SelectedItemText);
    --LinkText: var(--dark-LinkText);
    --VisitedText: var(--dark-VisitedText);
    --ActiveText: var(--dark-ActiveText);
    --MarkMix: var(--dark-MarkMix);
  }
}

/* Manual override (toggle) */
:root[data-theme="dark"] {
  color-scheme: dark;
  --Canvas: var(--dark-Canvas);
  --CanvasText: var(--dark-CanvasText);
  --AccentColor: var(--dark-AccentColor);
  --AccentColorText: var(--dark-AccentColorText);
  --ButtonFace: var(--dark-ButtonFace);
  --ButtonText: var(--dark-ButtonText);
  --ButtonBorder: var(--dark-ButtonBorder);
  --Field: var(--dark-Field);
  --FieldText: var(--dark-FieldText);
  --GrayText: var(--dark-GrayText);
  --Highlight: var(--dark-Highlight);
  --HighlightText: var(--dark-HighlightText);
  --SelectedItem: var(--dark-SelectedItem);
  --SelectedItemText: var(--dark-SelectedItemText);
  --LinkText: var(--dark-LinkText);
  --VisitedText: var(--dark-VisitedText);
  --ActiveText: var(--dark-ActiveText);
  --MarkMix: var(--dark-MarkMix);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--Canvas);
  color: var(--CanvasText);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  line-height: var(--line-height);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

html {
  scroll-behavior: smooth;
}

.to-top-hit {
  position: fixed;
  left: 0;
  top: var(--site-header-bottom, 0px);
  bottom: 0;
  width: max(var(--icon-size), calc((100vw - var(--wrap)) / 2));
  display: block;
  z-index: 10;
  isolation: isolate;
  cursor: default;
  pointer-events: none;
}

html[data-scrolled="1"] .to-top-hit {
  color: var(--GrayText);
  cursor: pointer;
  pointer-events: auto;
}

html[data-scrolled="1"] .to-top-hit:hover {
  color: var(--AccentColor);
}

html[data-scrolled="1"] .to-top-hit::after {
  content: "";
  position: absolute;
  left: max(50%, calc(var(--space) + (var(--icon-size) / 2)));
  top: 50%;
  transform: translate(-50%, -50%);
  width: var(--icon-size);
  height: var(--icon-size);
  background-color: currentColor;
  -webkit-mask-image: url("../assets/icons/up.svg");
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
  -webkit-mask-size: contain;
  mask-image: url("../assets/icons/up.svg");
  mask-repeat: no-repeat;
  mask-position: center;
  mask-size: contain;
  mask-mode: alpha;
  pointer-events: none;
}

/*
  Design rules:
  - Body uses Canvas / CanvasText.
  - Content links use LinkText, hover uses AccentColor.
  - Brand (home link) stays CanvasText; hover uses underline only.
  - Header nav items use CanvasText; hover uses AccentColor.
*/
a {
  color: var(--LinkText);
  text-decoration: none;
  text-decoration-thickness: var(--link-underline);
  text-underline-offset: var(--link-underline-offset);
}

a:visited {
  color: var(--LinkText);
}

a:active {
  color: var(--ActiveText);
}

a:hover {
  text-decoration: underline;
  text-decoration-thickness: var(--link-underline-hover);
  color: var(--AccentColor);
}

/* LaTeX-like paragraphs: use full line width (justify) with hyphenation when possible. */
.page-content p,
.page-content li {
  text-align: justify;
  text-justify: inter-word;
  hyphens: auto;
}

a:focus-visible {
  outline: var(--focus-outline) solid var(--AccentColor);
  outline-offset: var(--focus-offset);
  border-radius: var(--radius-sm);
}

::selection {
  background: var(--Highlight);
  color: var(--HighlightText);
}

.wrap {
  width: min(100% - var(--gutter), var(--wrap));
  margin-inline: auto;
}

.site-header {
  border-bottom: var(--border) solid var(--ButtonBorder);
}

.site-header .wrap {
  display: flex;
  gap: calc(var(--space) * 2);
  align-items: center;
  justify-content: space-between;
  padding: var(--space) 0;
}

.header-right {
  display: flex;
  gap: calc(var(--space) * 2);
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.brand {
  font-weight: var(--weight-regular);
  text-decoration: none;
  color: var(--CanvasText);
}

.brand:visited {
  color: var(--CanvasText);
}

.brand:hover {
  color: var(--AccentColor);
  text-decoration: none;
}

.nav {
  display: flex;
  gap: var(--space);
  flex-wrap: wrap;
}

.nav a {
  text-decoration: none;
  color: var(--CanvasText);
}

.nav a:visited {
  color: var(--CanvasText);
}

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

.nav a[aria-current="page"] {
  color: var(--CanvasText);
  font-weight: var(--weight-regular);
}

.theme-toggle {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--CanvasText);
  width: auto;
  height: auto;
  padding: 2px;
  border-radius: var(--radius-sm);
  font: inherit;
  line-height: 1;
  cursor: pointer;
  display: inline-grid;
  place-items: center;
}

.theme-toggle:hover {
  color: var(--AccentColor);
  background: transparent;
}

.theme-toggle:focus-visible {
  outline: var(--focus-outline) solid var(--AccentColor);
  outline-offset: var(--focus-offset);
  background: transparent;
}

.theme-icon {
  width: calc(var(--space) * 2);
  height: calc(var(--space) * 2);
  background-color: currentColor;
  display: inline-block;
  -webkit-mask-image: var(--theme-icon-url);
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
  -webkit-mask-size: contain;
  mask-image: var(--theme-icon-url);
  mask-repeat: no-repeat;
  mask-position: center;
  mask-size: contain;
  mask-mode: alpha;
}

:root[data-theme="dark"] {
  --theme-icon-url: url("../assets/theme/sun.svg");
}

:root[data-theme="light"] {
  color-scheme: light;
  --theme-icon-url: url("../assets/theme/moon.svg");
}

:root:not([data-theme]) {
  --theme-icon-url: url("../assets/theme/moon.svg");
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --theme-icon-url: url("../assets/theme/sun.svg");
  }
}

main {
  padding: calc(var(--space) * 3) 0 calc(var(--space) * 5);
  flex: 1;
}

main.page-content {
  --page-content-side-pad: max(
    0px,
    calc(
      (var(--icon-size) + (2 * var(--space))) -
        clamp(calc(var(--gutter) / 2), calc((100vw - var(--wrap)) / 2), 100vw)
    )
  );
  padding-inline: var(--page-content-side-pad);
}

.profile-block {
  display: flex;
  flex-wrap: wrap;
  gap: var(--profile-gap);
  align-items: start;
}

.profile-card {
  flex: 0 0 var(--profile-card-width);
  width: var(--profile-card-width);
  padding: var(--profile-card-padding);
  border-radius: calc(var(--profile-photo-radius) + var(--profile-card-padding));
  border: var(--border) solid var(--ButtonBorder);
  background: var(--Field);
  display: grid;
  place-items: center;
  gap: var(--profile-card-padding);
}

.profile-text {
  flex: 1 1 var(--profile-text-width);
  min-width: min(100%, var(--profile-text-width));
}

.profile-photo {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  height: auto;
  object-fit: cover;
  border-radius: var(--profile-photo-radius);
  background: var(--Canvas);
}

.profile-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space);
  padding: 0;
  margin: 0;
}

.profile-links a {
  color: var(--CanvasText);
  text-decoration: none;
  display: inline-grid;
  place-items: center;
  width: var(--icon-size);
  height: var(--icon-size);
  border-radius: var(--radius-sm);
  position: relative;
}

.profile-links a:hover,
.profile-links a:focus-visible {
  color: var(--AccentColor);
  background: transparent;
}

.profile-links a:focus-visible {
  outline: var(--focus-outline) solid var(--AccentColor);
  outline-offset: var(--focus-offset);
}

.profile-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space);
  flex-wrap: wrap;
  margin-bottom: var(--space);
}

.profile-title h1 {
  margin: 0;
}

.profile-name-link,
.profile-name-link:visited {
  color: var(--CanvasText);
  text-decoration: none;
}

.profile-name-link:hover {
  color: var(--AccentColor);
  text-decoration: underline;
  text-underline-offset: var(--link-underline-offset);
}

.contact-page {
  display: grid;
  gap: var(--space);
  justify-items: start;
}

.contact-page p {
  margin: 0;
  text-align: left;
}

.qr-list {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space) * 2);
  align-items: start;
  justify-content: center;
  width: 100%;
}

.qr-block {
  display: grid;
  gap: calc(var(--space) * 0.5);
  justify-items: center;
  width: min(100%, calc(var(--space) * 30));
}

.copy-text {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--CanvasText);
  display: inline-flex;
  gap: calc(var(--space) * 0.5);
  align-items: center;
  justify-content: center;
  font: inherit;
  padding: 0;
  text-align: center;
  cursor: pointer;
}

.copy-text:hover {
  color: var(--AccentColor);
}

.copy-text:focus-visible {
  outline: var(--focus-outline) solid var(--AccentColor);
  outline-offset: var(--focus-offset);
  border-radius: var(--radius-sm);
}

.copy-icon {
  width: 1.2em;
  height: 1.2em;
  flex: none;
  background-color: currentColor;
  -webkit-mask-image: url("../assets/icons/copy.svg");
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
  -webkit-mask-size: contain;
  mask-image: url("../assets/icons/copy.svg");
  mask-repeat: no-repeat;
  mask-position: center;
  mask-size: contain;
  mask-mode: alpha;
}

.copy-text[data-copied="true"] .copy-icon {
  -webkit-mask-image: url("../assets/icons/copy-success.svg");
  mask-image: url("../assets/icons/copy-success.svg");
}

.qr-code {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  padding: var(--space);
  border: var(--border) solid var(--ButtonBorder);
  border-radius: var(--radius-sm);
  background: var(--Canvas);
  color: var(--CanvasText);
}

.qr-code::before {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  background: currentColor;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
  -webkit-mask-size: contain;
  mask-repeat: no-repeat;
  mask-position: center;
  mask-size: contain;
  mask-mode: alpha;
}

.contact-qr::before {
  -webkit-mask-image: url("../contact/contact-qr.svg");
  mask-image: url("../contact/contact-qr.svg");
}

.linkedin-qr::before {
  -webkit-mask-image: url("../contact/linkedin-qr.svg");
  mask-image: url("../contact/linkedin-qr.svg");
}

.site-footer {
  border-top: var(--border) solid var(--ButtonBorder);
  padding: calc(var(--space) * 2) 0 calc(var(--space) * 2);
  color: var(--GrayText);
}

pre,
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.icon {
  width: 100%;
  height: 100%;
  flex: none;
  background-color: currentColor;
  display: inline-block;
  position: relative;
  z-index: 1;
  -webkit-mask-image: var(--icon);
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
  -webkit-mask-size: contain;
  mask-image: var(--icon);
  mask-repeat: no-repeat;
  mask-position: center;
  mask-size: contain;
  mask-mode: alpha;
}

.author-me {
  font-weight: inherit;
}

.pub-list {
  padding-left: 1.25em;
}

.pub-list > li {
  break-inside: avoid;
  margin: 0 0 calc(var(--space) * 2);
}

.pub-title {
  font-weight: var(--weight-bold);
  color: var(--CanvasText);
  text-decoration: none;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: normal;
}

.pub-title:visited {
  color: var(--CanvasText);
}

.pub-title:hover {
  color: var(--AccentColor);
  text-decoration: underline;
  text-underline-offset: var(--link-underline-offset);
}

.pub-title:focus-visible {
  outline: var(--focus-outline) solid var(--AccentColor);
  outline-offset: var(--focus-offset);
  border-radius: var(--radius-sm);
}

.pub-meta {
  color: var(--GrayText);
  font-weight: var(--weight-bold);
}

.pub-meta .author-me {
  color: var(--CanvasText);
}

.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: calc(var(--space) * 1);
}

.post-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: calc(var(--space) * 1);
  align-items: baseline;
}

.post-list a {
  text-decoration: none;
}

.post-list a:hover {
  text-decoration: underline;
  text-underline-offset: var(--link-underline-offset);
}

.footer-link {
  color: var(--GrayText);
  text-decoration: none;
}

.footer-link:hover {
  color: var(--AccentColor);
  text-decoration: underline;
  text-decoration-thickness: var(--link-underline-hover);
  text-underline-offset: var(--link-underline-offset);
}

.post-date {
  color: var(--GrayText);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}