/*
  ESC site search: the command palette, nav trigger, mobile button, and the
  homepage hero field. Everything is namespaced under .esc-search* so the
  legacy template styles (which restyle every button, input and list) can't
  leak in, and nothing here can leak out.
*/

:root {
  --esc-blue: #002676;
  --esc-blue-ink: #0b1533;
  --esc-founders: #2d6a8c;
  --esc-gold: #fdb515;
  --esc-gold-soft: rgba(253, 181, 21, 0.38);
  --esc-paper: #f5f7fb;
  --esc-panel: #ffffff;
  --esc-line: rgba(11, 21, 51, 0.1);
  --esc-muted: #5b6480;
  --esc-hover: #f2f5fb;
  --esc-selected: #e8eef9;
  --esc-ring: rgba(0, 38, 118, 0.55);
  --esc-shadow: 0 30px 80px -20px rgba(0, 18, 64, 0.45), 0 0 0 1px rgba(0, 18, 64, 0.06);
  --esc-font: 'Source Sans Pro', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --esc-mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

/* ---------- Shared resets ---------- */

.esc-search,
.esc-search *,
.esc-search-trigger,
.esc-search-trigger *,
.esc-hero-search,
.esc-hero-search * {
  box-sizing: border-box;
  letter-spacing: normal;
  text-transform: none;
}

.esc-search button,
.esc-search-trigger,
.esc-hero-search {
  -webkit-appearance: none;
  appearance: none;
  font: inherit;
  margin: 0;
  box-shadow: none;
  cursor: pointer;
  height: auto;
  line-height: normal;
  white-space: nowrap;
}

.esc-search kbd,
.esc-search-trigger kbd,
.esc-hero-search kbd {
  font-family: var(--esc-mono);
  font-size: 0.72em;
  font-weight: 600;
  line-height: 1;
  padding: 0.3em 0.45em;
  border-radius: 6px;
  border: 1px solid var(--esc-line);
  border-bottom-width: 2px;
  background: var(--esc-paper);
  color: var(--esc-muted);
}

/* ---------- Desktop nav trigger ---------- */

#header nav ul li.esc-search-nav {
  margin-left: 1em;
  vertical-align: middle;
}

.esc-search-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  padding: 0.5em 0.6em 0.5em 0.8em;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 102, 0.18);
  background: #fff;
  color: var(--esc-blue);
  font-family: var(--esc-font);
  font-size: 0.72em;
  font-weight: 600;
  transition:
    border-color 0.15s ease,
    background-color 0.15s ease;
}

.esc-search-trigger:hover {
  border-color: rgba(0, 38, 118, 0.4);
  background: var(--esc-hover);
}

.esc-search-trigger:focus-visible {
  outline: 2px solid var(--esc-ring);
  outline-offset: 2px;
}

.esc-search-trigger svg {
  width: 1.1em;
  height: 1.1em;
  flex: none;
}

/* ---------- Mobile title-bar button ---------- */

.esc-search-trigger.esc-search-trigger--bar {
  position: absolute;
  top: 10px;
  right: 14px;
  width: 44px;
  height: 44px;
  padding: 0;
  justify-content: center;
  border-radius: 12px;
  font-size: 18px;
  z-index: 2;
}

.esc-search-trigger--bar .esc-search-trigger-label,
.esc-search-trigger--bar kbd {
  display: none;
}

/* ---------- Homepage hero field ---------- */

.esc-hero-search {
  display: flex;
  align-items: center;
  gap: 0.8em;
  width: min(36rem, 100%);
  margin: 1.6em auto 0;
  padding: 0.95em 1em 0.95em 1.25em;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.96);
  color: var(--esc-muted);
  font-family: var(--esc-font);
  font-size: 1.05rem;
  text-align: left;
  box-shadow: 0 18px 50px -18px rgba(0, 0, 0, 0.6);
  transition:
    background-color 0.2s ease,
    box-shadow 0.2s ease;
}

.esc-hero-search:hover {
  background: #fff;
  box-shadow: 0 22px 60px -18px rgba(0, 0, 0, 0.7);
}

.esc-hero-search:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}

.esc-hero-search svg {
  width: 1.25em;
  height: 1.25em;
  color: var(--esc-blue);
  flex: none;
}

.esc-hero-search-text {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.esc-hero-search-text em {
  font-style: normal;
  color: var(--esc-blue);
  font-weight: 600;
}

.esc-hero-search-text .esc-swap {
  display: inline-block;
  transition:
    opacity 0.35s ease,
    transform 0.35s ease;
}

.esc-hero-search-text .esc-swap.is-out {
  opacity: 0;
  transform: translateY(0.35em);
}

/* ---------- Dialog ---------- */

html.esc-search-open {
  overflow: hidden;
}

dialog.esc-search {
  position: fixed;
  inset: 0;
  width: min(42rem, calc(100vw - 2rem));
  max-width: none;
  max-height: min(40rem, calc(100vh - 6rem));
  margin: 9vh auto auto;
  padding: 0;
  border: 0;
  border-radius: 20px;
  background: var(--esc-panel);
  color: var(--esc-blue-ink);
  font-family: var(--esc-font);
  font-size: 16px;
  line-height: 1.45;
  box-shadow: var(--esc-shadow);
  overflow: hidden;
}

dialog.esc-search[open] {
  display: flex;
  flex-direction: column;
  animation: esc-search-in 0.18s cubic-bezier(0.2, 0.9, 0.3, 1.2);
}

dialog.esc-search::backdrop {
  background: rgba(6, 14, 40, 0.52);
  -webkit-backdrop-filter: blur(6px) saturate(120%);
  backdrop-filter: blur(6px) saturate(120%);
  animation: esc-fade-in 0.18s ease;
}

@keyframes esc-search-in {
  from {
    opacity: 0;
    transform: translateY(-8px) scale(0.985);
  }
}

@keyframes esc-fade-in {
  from {
    opacity: 0;
  }
}

.esc-search-head {
  display: flex;
  align-items: center;
  gap: 0.75em;
  padding: 1em 1.1em;
  border-bottom: 1px solid var(--esc-line);
}

.esc-search-head > svg {
  width: 1.35em;
  height: 1.35em;
  color: var(--esc-blue);
  flex: none;
}

.esc-search input.esc-search-input {
  flex: 1;
  min-width: 0;
  width: auto;
  height: 2em;
  padding: 0;
  margin: 0;
  border: 0;
  border-radius: 0;
  outline: none;
  background: transparent;
  box-shadow: none;
  color: var(--esc-blue-ink);
  font: 500 1.2em/1.2 var(--esc-font);
}

.esc-search input.esc-search-input::placeholder {
  color: #8a91a8;
  opacity: 1;
}

.esc-search input.esc-search-input::-webkit-search-cancel-button {
  display: none;
}

.esc-search .esc-search-close {
  border: 0;
  background: none;
  padding: 0;
}

.esc-search-body {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0.5em 0.6em 0.8em;
  scroll-padding: 0.6em;
}

.esc-search-greeting {
  margin: 0.9em 0.7em 0.2em;
  font-size: 1.2em;
  font-weight: 700;
  color: var(--esc-blue);
}

.esc-search-greeting + p {
  margin: 0 0.85em 0.6em;
  color: var(--esc-muted);
  font-size: 0.95em;
}

.esc-search-group {
  margin: 0.9em 0.7em 0.35em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.72em;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--esc-muted);
}

.esc-search .esc-search-group button {
  border: 0;
  background: none;
  padding: 0.2em 0.3em;
  border-radius: 6px;
  color: var(--esc-founders);
  font-size: 1em;
  font-weight: 600;
  letter-spacing: normal;
  text-transform: none;
}

.esc-search .esc-search-group button:hover {
  text-decoration: underline;
}

ul.esc-search-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

ul.esc-search-list > li {
  margin: 0;
  padding: 0;
  list-style: none;
}

.esc-search a.esc-search-option {
  display: grid;
  grid-template-columns: 2.2em 1fr auto;
  align-items: center;
  gap: 0.15em 0.75em;
  padding: 0.6em 0.75em;
  border: 0;
  border-radius: 12px;
  color: inherit;
  text-decoration: none;
  outline: none;
  scroll-margin: 0.4em;
}

/* main.css turns every hovered link orange with !important; inside the
   palette that made highlighted titles unreadable, so links keep their ink. */
.esc-search a.esc-search-option,
.esc-search a.esc-search-option:hover,
.esc-search a.esc-search-option:focus {
  color: var(--esc-blue-ink) !important;
}

.esc-search .esc-search-empty a:hover {
  color: var(--esc-blue) !important;
}

.esc-search a.esc-search-option:hover {
  background: var(--esc-hover);
}

.esc-search a.esc-search-option[aria-selected='true'] {
  background: var(--esc-selected);
  box-shadow: inset 3px 0 0 var(--esc-blue);
}

.esc-search-icon {
  grid-row: span 2;
  width: 2.2em;
  height: 2.2em;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--esc-paper);
  color: var(--esc-blue);
}

.esc-search-icon svg {
  width: 1.1em;
  height: 1.1em;
}

[aria-selected='true'] .esc-search-icon {
  background: var(--esc-blue);
  color: #fff;
}

.esc-search-title {
  font-weight: 600;
  font-size: 1em;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.esc-search-meta {
  grid-column: 2;
  min-width: 0;
  font-size: 0.85em;
  color: var(--esc-muted);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.esc-search-trail {
  color: var(--esc-founders);
  font-weight: 600;
}

.esc-search-go {
  grid-row: span 2;
  grid-column: 3;
  font-size: 0.8em;
  color: var(--esc-muted);
  opacity: 0;
}

[aria-selected='true'] .esc-search-go {
  opacity: 1;
  color: var(--esc-blue);
}

.esc-search mark {
  background: linear-gradient(transparent 58%, var(--esc-gold-soft) 58%);
  color: inherit;
  padding: 0;
  border-radius: 2px;
}

.esc-search-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45em;
  margin: 0 0.6em;
  padding: 0;
  list-style: none;
}

.esc-search .esc-search-chips button {
  border: 1px solid var(--esc-line);
  background: var(--esc-paper);
  color: var(--esc-blue);
  border-radius: 999px;
  padding: 0.4em 0.85em;
  font-size: 0.9em;
  font-weight: 600;
}

.esc-search .esc-search-chips button:hover {
  border-color: rgba(0, 38, 118, 0.4);
  background: var(--esc-selected);
}

.esc-search .esc-search-chips button:focus-visible {
  outline: 2px solid var(--esc-ring);
  outline-offset: 2px;
}

.esc-search-empty {
  padding: 1.8em 1.2em 1.2em;
  text-align: center;
}

.esc-search-empty .esc-search-oski {
  font-size: 2.2em;
  line-height: 1;
}

.esc-search-empty h2 {
  margin: 0.5em 0 0.3em;
  font-family: var(--esc-font);
  font-weight: 700;
  font-size: 1.2em;
  color: var(--esc-blue);
  letter-spacing: normal;
  text-transform: none;
}

.esc-search-empty p {
  margin: 0 auto 1em;
  max-width: 28em;
  color: var(--esc-muted);
}

.esc-search-empty a {
  color: var(--esc-blue);
  font-weight: 600;
  border-bottom: 2px solid var(--esc-gold);
  text-decoration: none;
}

.esc-search-status {
  padding: 1.4em;
  text-align: center;
  color: var(--esc-muted);
}

.esc-search-foot {
  display: flex;
  align-items: center;
  gap: 1.1em;
  padding: 0.65em 1.1em;
  border-top: 1px solid var(--esc-line);
  background: var(--esc-paper);
  font-size: 0.78em;
  color: var(--esc-muted);
}

.esc-search-foot span {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
}

.esc-search-foot .esc-search-credit {
  margin-left: auto;
}

.esc-search-sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ---------- Phones: full-height sheet ---------- */

@media (max-width: 736px) {
  dialog.esc-search {
    width: 100vw;
    max-height: none;
    height: 100dvh;
    margin: 0;
    border-radius: 0;
  }

  .esc-search-foot .esc-search-keys,
  .esc-search-go {
    display: none;
  }

  .esc-search a.esc-search-option {
    grid-template-columns: 2.2em 1fr;
  }

  .esc-search input.esc-search-input {
    font-size: 1.1em;
  }
}

/* ---------- Dark theme (the bear toggle, assets/js/theme/theme.js) ---------- */

/* Only follows the site's own toggle, never the OS setting, so search always
   matches the page around it. */
html[data-theme='dark'] dialog.esc-search,
html[data-theme='dark'] .esc-search-trigger,
html[data-theme='dark'] .esc-hero-search {
  --esc-blue: #a9c1ff;
  --esc-blue-ink: #e6eaf6;
  --esc-founders: #8cc3e3;
  --esc-paper: #1a2342;
  --esc-panel: #131a33;
  --esc-line: rgba(214, 224, 255, 0.13);
  --esc-muted: #a6afca;
  --esc-hover: #1d2748;
  --esc-selected: #243058;
  --esc-ring: rgba(169, 193, 255, 0.7);
  --esc-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(214, 224, 255, 0.1);
}

html[data-theme='dark'] .esc-search-trigger {
  background: var(--esc-paper);
  border-color: var(--esc-line);
}

html[data-theme='dark'] .esc-search-trigger:hover {
  background: var(--esc-selected);
  border-color: rgba(214, 224, 255, 0.3);
}

html[data-theme='dark'] .esc-hero-search {
  background: rgba(19, 26, 51, 0.94);
  border-color: rgba(214, 224, 255, 0.22);
}

html[data-theme='dark'] .esc-hero-search:hover {
  background: var(--esc-panel);
}

html[data-theme='dark'] dialog.esc-search::backdrop {
  background: rgba(2, 5, 16, 0.66);
}

html[data-theme='dark'] .esc-search input.esc-search-input::placeholder {
  color: #8f98b5;
}

html[data-theme='dark'] [aria-selected='true'] .esc-search-icon {
  color: #0c1124;
}

@media (prefers-reduced-motion: reduce) {
  dialog.esc-search[open],
  dialog.esc-search::backdrop,
  .esc-hero-search,
  .esc-hero-search-text .esc-swap,
  .esc-search-trigger {
    animation: none;
    transition: none;
  }
}

/* ---------- Touch screens with the desktop nav (iPads) ---------- */

/* A finger-sized target, and no ⌘K hint: there's no keyboard to press it on. */
@media (pointer: coarse) {
  .esc-search-trigger:not(.esc-search-trigger--bar) {
    min-height: 44px;
    padding-inline: 1em;
  }

  .esc-search-trigger:not(.esc-search-trigger--bar) kbd {
    display: none;
  }
}

/* Narrow tablets (iPad Mini, iPads in portrait) have little room left in the
   nav, so the button becomes a round, icon-only target. The label stays in
   the accessibility tree, visually hidden, so it is still named "Search". */
@media (pointer: coarse) and (max-width: 980px) {
  .esc-search-trigger:not(.esc-search-trigger--bar) {
    width: 44px;
    height: 44px;
    padding: 0;
    justify-content: center;
    font-size: 16px;
  }

  .esc-search-trigger:not(.esc-search-trigger--bar) .esc-search-trigger-label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
  }
}