/**
 * Homepage layout — table-based grid preserved for pixel-stable rendering.
 * Typography complements stylesheet.css (Lato, link colors).
 */

:root {
  --color-page-bg: #f9f9f9;
  --color-section-header: #eee;
  --color-text: #222;
  --color-text-muted: #444;
  --color-strong: #222;
  --color-link: #1772d0;
  --color-link-hover: #f09228;
  --color-accordion-bg: #eee;
  --color-accordion-hover: #ccc;
  --color-representative: #e0ffe0;
  --color-award: #f00;
  --color-highlight: #ffffd0;
  --color-border: #d8d8d8;
  --color-toggle-track: #d7d7d7;
  --color-toggle-thumb: #fff;
  --layout-max-width: 875px;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --color-page-bg: #111315;
  --color-section-header: #20242a;
  --color-text: #e8e8e8;
  --color-text-muted: #c9ced6;
  --color-strong: #f4f4f4;
  --color-link: #7bb7ff;
  --color-link-hover: #ffc06b;
  --color-accordion-bg: #20242a;
  --color-accordion-hover: #2f3640;
  --color-representative: #173b28;
  --color-award: #ff8c8c;
  --color-highlight: #414020;
  --color-border: #313842;
  --color-toggle-track: #46607f;
  --color-toggle-thumb: #f1f5f9;
  color-scheme: dark;
}

/* -------------------------------------------------------------------------- */
/* Accessibility */
/* -------------------------------------------------------------------------- */

.skip-link {
  position: absolute;
  left: -10000px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  z-index: 10000;
  padding: 0.5rem 1rem;
  background: var(--color-page-bg);
  font-family: "Lato", Verdana, Helvetica, sans-serif;
  font-size: 14px;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  overflow: visible;
  outline: 2px solid #1772d0;
}

.site-main {
  display: block;
}

/* -------------------------------------------------------------------------- */
/* Profile & section typography (replaces non-standard <name>, <heading>, <papertitle>) */
/* -------------------------------------------------------------------------- */

.profile-name {
  margin: 0;
  font-weight: 400;
  font-size: 32px;
  font-family: "Lato", Verdana, Helvetica, sans-serif;
}

.section-heading {
  margin: 0;
  font-weight: 400;
  font-size: 22px;
  font-family: "Lato", Verdana, Helvetica, sans-serif;
}

.section-heading--mono {
  font-family: monospace;
  font-size: 22px;
  color: var(--color-text-muted);
}

.section-heading--updates {
  font-family: monospace;
  font-size: 16px;
  color: var(--color-text-muted);
}

.paper-title {
  font-family: "Lato", Verdana, Helvetica, sans-serif;
  font-size: 15px;
  font-weight: 700;
}

.research-lede {
  font-size: 16px;
}

.text-sm {
  font-size: 13px;
}

.text-award {
  color: var(--color-award);
}

.text-center {
  text-align: center;
}

.site-attribution {
  margin: 20px auto 32px;
  max-width: var(--layout-max-width);
  color: var(--color-text-muted);
  font-size: 13px;
}

.visitor-map {
  margin: 0 auto 32px;
  max-width: var(--layout-max-width);
}

.visitor-map img {
  max-width: 100%;
  height: auto;
}

/* -------------------------------------------------------------------------- */
/* Page background */
/* -------------------------------------------------------------------------- */

body {
  background-color: var(--color-page-bg);
  color: var(--color-text);
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* -------------------------------------------------------------------------- */
/* Theme toggle */
/* -------------------------------------------------------------------------- */

.theme-toggle-wrap {
  box-sizing: border-box;
  width: 100%;
  max-width: var(--layout-max-width);
  margin: 16px auto 0;
  padding: 0 20px;
  text-align: right;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted);
  font-family: "Lato", Verdana, Helvetica, sans-serif;
  font-size: 13px;
  cursor: pointer;
  user-select: none;
}

.theme-toggle input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.theme-toggle-track {
  position: relative;
  display: inline-flex;
  width: 40px;
  height: 22px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background-color: var(--color-toggle-track);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.theme-toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--color-toggle-thumb);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.theme-toggle input:checked + .theme-toggle-track .theme-toggle-thumb {
  transform: translateX(18px);
}

.theme-toggle input:focus-visible + .theme-toggle-track {
  outline: 2px solid var(--color-link);
  outline-offset: 2px;
}

/* -------------------------------------------------------------------------- */
/* Representative works (table rows + inline legend span) */
/* -------------------------------------------------------------------------- */

.representative {
  background-color: var(--color-representative);
}

/* -------------------------------------------------------------------------- */
/* Collapsible & accordion (legacy class names retained for JS) */
/* -------------------------------------------------------------------------- */

.accordion {
  background-color: var(--color-accordion-bg);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 14px;
  width: 100%;
  border: none;
  text-align: right;
  outline: none;
  font-size: 22px;
  font-family: monospace;
  transition: background-color 0.4s;
}

.accordion:hover,
.accordion.active {
  background-color: var(--color-accordion-hover);
}

.panel {
  padding: 0;
  width: 100%;
  vertical-align: middle;
  background-color: var(--color-page-bg);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out;
}

.collapsible {
  background-color: var(--color-page-bg);
  cursor: pointer;
  width: 100%;
  border: none;
  text-align: right;
  outline: none;
  font-family: monospace;
  transition: background-color 0.4s;
}

.collapsible:hover,
.collapsible.active {
  background-color: var(--color-accordion-hover);
}

.collapsible + .content {
  display: none;
  overflow: hidden;
  background-color: var(--color-page-bg);
  transition: max-height 0.4s ease-out;
}

/* -------------------------------------------------------------------------- */
/* Layout tables — match legacy inline table/td rules */
/* -------------------------------------------------------------------------- */

.tbl {
  width: 100%;
  border: 0;
  border-spacing: 0;
  border-collapse: separate;
  margin-right: auto;
  margin-left: auto;
}

.tbl--page {
  max-width: var(--layout-max-width);
}

.tbl--page-spaced {
  max-width: var(--layout-max-width);
  margin-top: 20px;
}

.tbl--surface {
  background-color: var(--color-page-bg);
}

.tbl--pad-top {
  padding-top: 12.5px;
}

.cell-pad-0 {
  padding: 0;
}

.cell-profile-photo {
  padding: 2.5%;
  width: 40%;
  max-width: 40%;
}

.cell-profile-bio {
  padding: 2.5%;
  width: 63%;
  vertical-align: middle;
  background-color: var(--color-page-bg);
}

.profile-photo-img {
  width: 100%;
  max-width: 100%;
}

.section-label {
  text-align: right;
  background-color: var(--color-section-header);
  padding: 14px;
}

.section-label--updates {
  text-align: right;
  background-color: var(--color-section-header);
  padding: 10px;
}

.updates-scroll {
  height: 125px;
  overflow-y: scroll;
  padding: 10px;
  background-color: var(--color-page-bg);
}

.updates-list {
  list-style-type: disc;
  padding-left: 20px;
  margin: 0;
  font-family: "Lato", Helvetica, sans-serif;
  font-size: 14px;
  color: var(--color-text-muted);
}

.cell-thumb {
  padding: 20px;
  width: 25%;
  vertical-align: middle;
}

.cell-full {
  padding: 20px;
  width: 100%;
  vertical-align: middle;
}

.cell-full-surface {
  padding: 20px;
  width: 100%;
  vertical-align: middle;
  background-color: var(--color-page-bg);
}