/*
 * AgnosticDK website stylesheet
 *
 * The ADK Vault Workbench extracts this adk-css block into /site.css.
 * Keep this as the only active adk-css block in the canonical vault.
 */

/* -------------------------------------------------------------------------- */
/* Design tokens                                                              */
/* -------------------------------------------------------------------------- */

:root {
  color-scheme: dark light;

  --font-sans:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  --font-mono:
    "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --page-width: 92rem;
  --content-width: 66rem;
  --reading-width: 58rem;
  --nav-height: 4.25rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;

  --radius-sm: 0.4rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.1rem;
  --radius-pill: 999rem;

  --bg: #0b1020;
  --bg-elevated: #11182a;
  --bg-soft: #171f34;
  --bg-strong: #1d2740;
  --bg-code: #080c17;
  --bg-nav: rgba(11, 16, 32, 0.94);

  --text: #e8edf7;
  --text-muted: #a8b2c7;
  --text-faint: #7e8aa3;

  --border: #2a3550;
  --border-strong: #3c4967;

  --accent: #8aa4ff;
  --accent-strong: #b0bfff;
  --accent-soft: rgba(138, 164, 255, 0.14);
  --accent-border: rgba(138, 164, 255, 0.42);

  --human: #70d6b0;
  --human-soft: rgba(112, 214, 176, 0.12);
  --human-border: rgba(112, 214, 176, 0.42);

  --ai: #c39bff;
  --ai-soft: rgba(195, 155, 255, 0.12);
  --ai-border: rgba(195, 155, 255, 0.42);

  --success: #7dd3a7;
  --warning: #f5c26b;
  --danger: #ff8d9b;

  --shadow-sm:
    0 1px 2px rgba(0, 0, 0, 0.2),
    0 7px 18px rgba(0, 0, 0, 0.12);
  --shadow:
    0 1px 2px rgba(0, 0, 0, 0.22),
    0 16px 38px rgba(0, 0, 0, 0.22);

  --transition: 150ms ease;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f7fb;
    --bg-elevated: #ffffff;
    --bg-soft: #edf1f8;
    --bg-strong: #e4eaf4;
    --bg-code: #f0f3f8;
    --bg-nav: rgba(245, 247, 251, 0.94);

    --text: #182033;
    --text-muted: #526078;
    --text-faint: #71809b;

    --border: #d7deea;
    --border-strong: #bcc7d9;

    --accent: #435fd0;
    --accent-strong: #263f9e;
    --accent-soft: rgba(67, 95, 208, 0.1);
    --accent-border: rgba(67, 95, 208, 0.34);

    --human: #18794e;
    --human-soft: rgba(24, 121, 78, 0.08);
    --human-border: rgba(24, 121, 78, 0.28);

    --ai: #7448b8;
    --ai-soft: rgba(116, 72, 184, 0.08);
    --ai-border: rgba(116, 72, 184, 0.28);

    --success: #18794e;
    --warning: #946200;
    --danger: #b42338;

    --shadow-sm:
      0 1px 2px rgba(22, 30, 50, 0.06),
      0 7px 18px rgba(22, 30, 50, 0.06);
    --shadow:
      0 1px 2px rgba(22, 30, 50, 0.08),
      0 16px 36px rgba(22, 30, 50, 0.08);
  }
}

/* -------------------------------------------------------------------------- */
/* Baseline                                                                   */
/* -------------------------------------------------------------------------- */

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

html {
  height: 100%;
  min-width: 20rem;
  overflow: hidden;
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  height: 100vh;
  height: 100dvh;
  min-height: 100vh;
  margin: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 90% -10%, var(--accent-soft), transparent 30rem),
    radial-gradient(circle at 10% 20%, rgba(112, 214, 176, 0.05), transparent 26rem),
    var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.68;
  overflow-wrap: anywhere;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
  transition:
    color var(--transition),
    background-color var(--transition),
    border-color var(--transition),
    transform var(--transition);
}

a:hover {
  color: var(--accent-strong);
}

.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 200;
  padding: 0.65rem 0.85rem;
  border: 2px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text);
  font-weight: 750;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

a:focus-visible,
summary:focus-visible,
button:focus-visible,
[data-glossary-definition]:focus-visible,
[tabindex]:focus-visible {
  outline: 0.18rem solid var(--accent);
  outline-offset: 0.18rem;
  border-radius: var(--radius-sm);
}

img,
svg,
video {
  max-width: 100%;
  height: auto;
}

.glossary-term {
  position: relative;
  border-bottom: 1px dotted var(--accent);
  color: inherit;
  cursor: help;
  text-decoration: none;
}

.glossary-term::after {
  content: attr(data-glossary-definition);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 0.55rem);
  z-index: 80;
  display: none;
  width: min(24rem, calc(100vw - 2rem));
  box-sizing: border-box;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-soft);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.84rem;
  font-weight: 500;
  line-height: 1.45;
  text-align: left;
  white-space: normal;
  transform: translateX(-50%);
}

.glossary-term:hover::after,
.glossary-term:focus::after {
  display: block;
}

hr {
  margin: var(--space-7) 0;
  border: 0;
  border-top: 1px solid var(--border);
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* -------------------------------------------------------------------------- */
/* Horizontal navigation                                                      */
/* -------------------------------------------------------------------------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: var(--nav-height);
  border-bottom: 1px solid var(--border);
  background: var(--bg-nav);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.025);
}

.nav-inner {
  width: min(calc(100% - 2rem), var(--page-width));
  min-height: var(--nav-height);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  color: var(--text);
  font-size: 1.2rem;
  font-weight: 840;
  letter-spacing: -0.035em;
  text-decoration: none;
}

.nav-brand::before {
  content: "";
  flex: 0 0 auto;
  width: 1.35rem;
  height: 1.35rem;
  margin-right: var(--space-3);
  border-radius: var(--radius-sm);
  background: url("favicon.ico") center / contain no-repeat;
  filter: drop-shadow(0 0 0.4rem var(--accent-soft));
}

.nav-brand:hover {
  color: var(--accent-strong);
}

.nav-links {
  min-width: 0;
  flex: 1 1 auto;
  display: flex;
  align-items: stretch;
  gap: var(--space-1);
}

.nav-link,
.nav-menu > summary {
  min-height: 2.45rem;
  display: inline-flex;
  align-items: center;
  padding: 0.48rem 0.75rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 680;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
}

.nav-link:hover,
.nav-menu > summary:hover,
.nav-link.active,
.nav-menu.active > summary {
  border-color: var(--accent-border);
  background: var(--accent-soft);
  color: var(--text);
}

.nav-menu {
  position: relative;
}

.nav-menu > summary {
  list-style: none;
}

.nav-menu > summary::-webkit-details-marker {
  display: none;
}

.nav-menu > summary::after {
  content: "▾";
  margin-left: 0.4rem;
  color: var(--text-faint);
  font-size: 0.72rem;
  transition: transform var(--transition);
}

.nav-menu[open] > summary::after {
  transform: rotate(180deg);
}

.nav-dropdown {
  min-width: 14rem;
  padding: var(--space-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  box-shadow: var(--shadow);
}

.nav-dropdown-wide {
  width: min(38rem, calc(100vw - 2rem));
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.nav-section {
  min-width: 0;
}

.nav-section-title {
  display: block;
  margin: 0 0 var(--space-2);
  padding: 0 var(--space-2) var(--space-2);
  border-bottom: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 0.7rem;
  font-weight: 820;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.nav-dropdown-link {
  display: block;
  padding: 0.56rem 0.62rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.32;
  text-decoration: none;
}

.nav-dropdown-link + .nav-dropdown-link {
  margin-top: var(--space-1);
}

.nav-dropdown-link:hover,
.nav-dropdown-link.active {
  border-color: var(--accent-border);
  background: var(--accent-soft);
  color: var(--text);
}

@media (min-width: 52.01rem) {
  .nav-dropdown {
    position: absolute;
    top: calc(100% + 0.45rem);
    left: 0;
    display: none;
  }

  .nav-menu[open] > .nav-dropdown,
  .nav-menu:hover > .nav-dropdown,
  .nav-menu:focus-within > .nav-dropdown {
    display: block;
  }

  .nav-menu[open] > .nav-dropdown-wide,
  .nav-menu:hover > .nav-dropdown-wide,
  .nav-menu:focus-within > .nav-dropdown-wide {
    display: grid;
  }
}

/* -------------------------------------------------------------------------- */
/* Main page                                                                  */
/* -------------------------------------------------------------------------- */

main {
  width: min(calc(100% - 2rem), var(--content-width));
  min-width: 0;
  min-height: 0;
  margin: 0 auto;
  padding: var(--space-7) 0 var(--space-8);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

.page-header {
  position: relative;
  max-width: var(--reading-width);
  margin: 0 auto var(--space-7);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--border);
}

.page-header::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 5rem;
  height: 2px;
  background: var(--accent);
}

.page-header h1 {
  margin: 0;
  color: var(--text);
  font-size: clamp(2.2rem, 5vw, 3.7rem);
  line-height: 1.06;
  letter-spacing: -0.05em;
}

main > :not(.timeline-shell):not(.timeline-intro):not(.card-grid) {
  max-width: var(--reading-width);
  margin-left: auto;
  margin-right: auto;
}

.lede {
  margin-top: 0;
  color: var(--text-muted);
  font-size: clamp(1.08rem, 2vw, 1.22rem);
  line-height: 1.65;
}

.post-meta {
  margin-top: calc(-1 * var(--space-4));
  margin-bottom: var(--space-5);
  color: var(--text-faint);
  font-size: 0.9rem;
  font-weight: 680;
}

/* -------------------------------------------------------------------------- */
/* Typography                                                                 */
/* -------------------------------------------------------------------------- */

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--text);
  font-weight: 760;
  line-height: 1.22;
  text-wrap: balance;
}

h2 {
  margin: var(--space-7) 0 var(--space-4);
  font-size: clamp(1.45rem, 3vw, 2rem);
  letter-spacing: -0.025em;
}

h3 {
  margin: var(--space-6) 0 var(--space-3);
  font-size: clamp(1.18rem, 2vw, 1.42rem);
}

h4 {
  margin: var(--space-5) 0 var(--space-2);
  font-size: 1.08rem;
}

h5,
h6 {
  margin: var(--space-4) 0 var(--space-2);
  font-size: 1rem;
}

p {
  margin: 0 0 var(--space-4);
}

strong {
  color: var(--text);
  font-weight: 780;
}

small {
  color: var(--text-muted);
}

ul,
ol {
  margin: 0 0 var(--space-5);
  padding-left: 1.4rem;
}

li {
  padding-left: var(--space-1);
}

li + li {
  margin-top: var(--space-2);
}

li::marker {
  color: var(--accent);
}

blockquote {
  margin: var(--space-5) 0;
  padding: var(--space-4) var(--space-5);
  border-left: 0.28rem solid var(--accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--accent-soft);
  color: var(--text-muted);
}

blockquote p:last-child {
  margin-bottom: 0;
}

/* -------------------------------------------------------------------------- */
/* Topic sections and cards                                                   */
/* -------------------------------------------------------------------------- */

.topic-section {
  max-width: var(--reading-width);
  margin: var(--space-6) auto;
  padding: clamp(1.2rem, 3vw, 2rem);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, var(--accent-soft), transparent 14rem),
    var(--bg-elevated);
  box-shadow: var(--shadow-sm);
}

.topic-section > :first-child {
  margin-top: 0;
}

.topic-section > :last-child {
  margin-bottom: 0;
}

.topic-section > h2:first-child {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: var(--space-4);
  margin: var(--space-5) auto;
}

.card {
  position: relative;
  min-width: 0;
  padding: var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--transition),
    border-color var(--transition),
    background-color var(--transition);
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-border);
  background: var(--bg-soft);
}

.card h2 {
  margin: 0 0 var(--space-2);
  padding: 0;
  border: 0;
  font-size: 1.14rem;
}

.card h2 a {
  color: var(--text);
  text-decoration: none;
}

.card h2 a:hover {
  color: var(--accent-strong);
}

.card p {
  margin: 0;
  color: var(--text-faint);
  font-size: 0.9rem;
}

/* -------------------------------------------------------------------------- */
/* Developer timeline                                                         */
/* -------------------------------------------------------------------------- */

.page-role-developer-blog main {
  width: min(calc(100% - 2rem), var(--page-width));
}

.page-role-developer-blog .page-header {
  max-width: var(--content-width);
}

.timeline-intro {
  max-width: var(--content-width);
  margin: var(--space-5) auto var(--space-7);
}

.timeline-intro:hover {
  transform: none;
  background: var(--bg-elevated);
}

.timeline-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.timeline-stats span {
  padding: 0.42rem 0.68rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--bg-soft);
  color: var(--text-muted);
  font-size: 0.88rem;
}

.timeline-section-links {
  margin: var(--space-4) 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.timeline-shell {
  width: 100%;
  margin: 0 auto;
}

.timeline-lane-headings {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 9rem minmax(0, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-5);
  color: var(--text-faint);
  font-size: 0.73rem;
  font-weight: 820;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.timeline-lane-human {
  text-align: right;
  color: var(--human);
}

.timeline-lane-time {
  text-align: center;
}

.timeline-lane-ai {
  text-align: left;
  color: var(--ai);
}

.timeline-stream {
  position: relative;
}

.timeline-stream::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  transform: translateX(-1px);
  background: linear-gradient(var(--accent), var(--border), transparent);
}

.timeline-day {
  --timeline-gap: 0rem;
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 9rem minmax(0, 1fr);
  align-items: start;
  gap: var(--space-5);
  margin-top: var(--timeline-gap);
}

.timeline-day + .timeline-day {
  padding-top: var(--space-5);
}

.timeline-stack {
  min-width: 0;
  display: grid;
  gap: var(--space-4);
}

.timeline-human-stack {
  justify-items: end;
}

.timeline-ai-stack {
  justify-items: start;
}

.timeline-date {
  position: relative;
  z-index: 2;
  align-self: start;
  justify-self: center;
  min-width: 8rem;
  padding: 0.52rem 0.58rem;
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-pill);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.timeline-date::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: -1;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 1rem var(--accent);
  transform: translate(-50%, -50%);
  opacity: 0.18;
}

.timeline-date time {
  display: block;
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 780;
}

.timeline-date span {
  display: block;
  margin-top: 0.15rem;
  color: var(--text-faint);
  font-size: 0.72rem;
}

.timeline-card {
  width: min(100%, 28rem);
  padding: var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--transition),
    border-color var(--transition),
    background-color var(--transition);
}

.timeline-card:hover {
  transform: translateY(-2px);
}

.timeline-card-human {
  border-color: var(--human-border);
  background:
    linear-gradient(135deg, var(--human-soft), transparent 11rem),
    var(--bg-elevated);
}

.timeline-card-ai {
  border-color: var(--ai-border);
  background:
    linear-gradient(135deg, var(--ai-soft), transparent 11rem),
    var(--bg-elevated);
}

.timeline-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.22rem 0.48rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--bg-soft);
  color: var(--text-faint);
  font-size: 0.68rem;
  font-weight: 780;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.timeline-card-human .timeline-kind {
  border-color: var(--human-border);
  background: var(--human-soft);
  color: var(--human);
}

.timeline-card-ai .timeline-kind {
  border-color: var(--ai-border);
  background: var(--ai-soft);
  color: var(--ai);
}

.timeline-card-ai .timeline-author {
  border-color: var(--ai-border);
  background: color-mix(in srgb, var(--ai-soft) 62%, var(--bg-soft));
  color: var(--text-muted);
  letter-spacing: 0.025em;
  text-transform: none;
}

.timeline-card h3 {
  margin: 0 0 var(--space-3);
  font-size: 1.08rem;
}

.timeline-card h3 a {
  color: var(--text);
  text-decoration: none;
}

.timeline-card h3 a:hover {
  color: var(--accent-strong);
}

.timeline-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

/* -------------------------------------------------------------------------- */
/* One-sided blog archives                                                    */
/* -------------------------------------------------------------------------- */

.blog-archive {
  max-width: var(--reading-width);
  margin: var(--space-6) auto 0;
  display: grid;
  gap: var(--space-4);
}

.archive-card {
  position: relative;
  padding: var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
}

.archive-card time {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--text-faint);
  font-size: 0.78rem;
  font-weight: 720;
}

.archive-card h2 {
  margin: 0 0 var(--space-3);
  font-size: 1.22rem;
}

.archive-card h2 a {
  color: var(--text);
  text-decoration: none;
}

.archive-card h2 a:hover {
  color: var(--accent-strong);
}

.archive-card p {
  margin: 0;
  color: var(--text-muted);
}

.page-role-human-archive .archive-card {
  border-left: 0.28rem solid var(--human);
}

.page-role-ai-archive .archive-card {
  border-left: 0.28rem solid var(--ai);
}

/* -------------------------------------------------------------------------- */
/* Code, tables, and rich content                                             */
/* -------------------------------------------------------------------------- */

code {
  padding: 0.1em 0.34em;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-code);
  color: var(--accent-strong);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

pre {
  max-width: 100%;
  margin: var(--space-5) 0;
  padding: var(--space-5);
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-code);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.025);
  line-height: 1.55;
  tab-size: 4;
}

pre code {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--text);
  font-size: 0.88rem;
}

table {
  width: 100%;
  margin: var(--space-5) 0;
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  overflow: hidden;
}

th,
td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--bg-soft);
  color: var(--text);
  font-size: 0.84rem;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

tr:last-child td {
  border-bottom: 0;
}

tbody tr:hover {
  background: var(--accent-soft);
}

/* -------------------------------------------------------------------------- */
/* Reader feedback                                                            */
/* -------------------------------------------------------------------------- */

.page-feedback {
  position: fixed;
  top: 0.62rem;
  right: max(1rem, calc((100vw - var(--page-width)) / 2));
  z-index: 70;
}

.page-feedback-trigger {
  min-height: 2.45rem;
  display: inline-flex;
  align-items: center;
  padding: 0.48rem 0.82rem;
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 750;
  line-height: 1.2;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.page-feedback-trigger::-webkit-details-marker {
  display: none;
}

.page-feedback-trigger::after {
  content: "\25BE";
  margin-left: 0.48rem;
  color: var(--text-faint);
  font-size: 1rem;
  transition: transform var(--transition);
}

.page-feedback[open] > .page-feedback-trigger::after {
  transform: rotate(180deg);
}

.page-feedback-trigger:hover,
.page-feedback[open] > .page-feedback-trigger {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.page-feedback-panel {
  position: absolute;
  top: calc(100% + 0.48rem);
  right: 0;
  width: min(32rem, calc(100vw - 2rem));
  max-height: calc(100vh - var(--nav-height) - 1.5rem);
  overflow-y: auto;
  box-sizing: border-box;
  padding: var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(86, 182, 194, 0.08), transparent 45%),
    var(--bg-elevated);
  box-shadow: var(--shadow);
}

.feedback-submit-row,
.reaction-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.page-feedback h2 {
  margin: 0;
  font-size: 1.18rem;
}

.page-feedback-question {
  margin: 0;
  color: var(--text-muted);
}

.feedback-privacy {
  margin: 0;
  color: var(--text-faint);
  font-size: 0.82rem;
}

.reaction-controls {
  margin-top: var(--space-3);
}

.reaction-button,
.feedback-submit-row button {
  padding: 0.58rem 0.85rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
  color: var(--text);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.reaction-button span {
  display: inline-block;
  min-width: 1.35rem;
  margin-left: 0.3rem;
  padding: 0.05rem 0.28rem;
  border-radius: 999px;
  background: var(--bg-code);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-align: center;
}

.reaction-button[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.reaction-button:disabled,
.feedback-submit-row button:disabled {
  cursor: wait;
  opacity: 0.58;
}

.topic-section-heading-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border);
}

.topic-section-heading-row > h2,
.topic-section-heading-row > h3,
.topic-section-heading-row > h4 {
  flex: 1 1 18rem;
  margin: 0;
}

.section-reaction {
  flex: 0 0 auto;
  width: fit-content;
  margin: 0.08rem 0 0 auto;
  display: flex;
  align-items: center;
  gap: 0.28rem;
  color: var(--text-faint);
  font-size: 0.72rem;
}

.section-reaction-button {
  min-width: 2.7rem;
  min-height: 1.75rem;
  padding: 0.18rem 0.38rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.24rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font: inherit;
}

.section-reaction-button:hover,
.section-reaction-button[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.section-reaction-button:disabled {
  cursor: wait;
  opacity: 0.58;
}

.section-reaction-count {
  min-width: 0.75rem;
  font-variant-numeric: tabular-nums;
}

.feedback-tabs {
  display: flex;
  gap: 0.25rem;
  margin: calc(-1 * var(--space-2)) calc(-1 * var(--space-2)) var(--space-4);
  padding: var(--space-2) var(--space-2) 0;
  border-bottom: 1px solid var(--border);
}

.feedback-tab {
  padding: 0.48rem 0.68rem 0.55rem;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--text-muted);
  font: inherit;
  font-weight: 750;
  cursor: pointer;
}

.feedback-tab:hover,
.feedback-tab[aria-selected="true"] {
  border-bottom-color: var(--accent);
  color: var(--accent-strong);
}

.feedback-tab-panel[hidden] {
  display: none;
}

.private-feedback form {
  display: grid;
  gap: 0.68rem;
}

.private-feedback label {
  display: grid;
  gap: 0.22rem;
  color: var(--text-muted);
  font-weight: 650;
}

.feedback-label-line {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
}

.feedback-label-line > span:first-child {
  color: var(--text-muted);
  font-size: inherit;
  font-weight: 650;
}

.feedback-label-line .feedback-optional {
  margin-left: auto;
  color: var(--text-faint);
  font-size: 0.78rem;
  font-weight: 500;
}

.private-feedback input,
.private-feedback select,
.private-feedback textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 0.52rem 0.68rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

.private-feedback textarea {
  min-height: 6rem;
  resize: vertical;
}

.feedback-status {
  min-height: 1.25em;
  color: var(--text-muted);
  font-size: 0.84rem;
}

.feedback-status[data-status-kind="error"] {
  color: var(--danger);
}

.feedback-status[data-status-kind="success"] {
  color: var(--success);
}

.feedback-honeypot {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
}

.feedback-privacy {
  margin-top: var(--space-3);
}

@media (min-width: 52.01rem) {
  .nav-inner {
    box-sizing: border-box;
    padding-right: 7rem;
  }
}

@media (max-width: 52rem) {
  .page-feedback {
    top: 0.72rem;
    right: 0.75rem;
  }

  .nav-inner {
    box-sizing: border-box;
    padding-right: 6.5rem;
  }

  .page-feedback-panel {
    width: min(32rem, calc(100vw - 1.5rem));
    max-height: calc(100vh - 4.5rem);
  }

  .topic-section-heading-row > h2,
  .topic-section-heading-row > h3,
  .topic-section-heading-row > h4 {
    flex-basis: 14rem;
  }
}

/* -------------------------------------------------------------------------- */
/* Footer                                                                     */
/* -------------------------------------------------------------------------- */

.site-footer {
  width: min(calc(100% - 2rem), var(--content-width));
  margin: 0 auto;
  padding: var(--space-3) 0;
  border-top: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 0.84rem;
}

.site-footer p {
  margin: 0;
}

/* -------------------------------------------------------------------------- */
/* Responsive layout                                                          */
/* -------------------------------------------------------------------------- */

@media (max-width: 68rem) {
  .timeline-lane-headings,
  .timeline-day {
    grid-template-columns: minmax(0, 1fr) 7.5rem minmax(0, 1fr);
    gap: var(--space-4);
  }

  .timeline-date {
    min-width: 7rem;
  }
}

@media (max-width: 52rem) {
  .site-nav {
    position: static;
  }

  .nav-inner {
    width: min(calc(100% - 1.5rem), var(--page-width));
    display: block;
    padding: var(--space-4) 0;
  }

  .nav-brand {
    margin-bottom: var(--space-3);
  }

  .nav-links {
    display: grid;
    gap: var(--space-2);
  }

  .nav-link,
  .nav-menu > summary {
    width: 100%;
    justify-content: space-between;
  }

  .nav-dropdown {
    margin-top: var(--space-2);
    box-shadow: none;
  }

  .nav-dropdown-wide {
    width: 100%;
  }

  main {
    width: min(calc(100% - 1.5rem), var(--content-width));
    padding-top: var(--space-6);
  }

  .page-role-developer-blog main {
    width: min(calc(100% - 1.5rem), var(--page-width));
  }

  .timeline-lane-headings {
    display: none;
  }

  .timeline-stream::before {
    left: 1.15rem;
  }

  .timeline-day {
    display: grid;
    grid-template-columns: 2.3rem minmax(0, 1fr);
    gap: var(--space-3);
  }

  .timeline-date {
    grid-column: 1 / -1;
    justify-self: start;
    margin-left: 0;
  }

  .timeline-human-stack,
  .timeline-ai-stack {
    grid-column: 2;
    justify-items: stretch;
  }

  .timeline-human-stack::before,
  .timeline-ai-stack::before {
    display: block;
    margin-bottom: var(--space-2);
    color: var(--text-faint);
    font-size: 0.7rem;
    font-weight: 820;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }

  .timeline-human-stack:not(:empty)::before {
    content: "Human";
    color: var(--human);
  }

  .timeline-ai-stack:not(:empty)::before {
    content: "AI";
    color: var(--ai);
  }

  .timeline-card {
    width: 100%;
  }
}

@media (max-width: 36rem) {
  .nav-dropdown-wide {
    display: block;
  }

  .nav-section + .nav-section {
    margin-top: var(--space-4);
  }

  .page-header h1 {
    font-size: clamp(2rem, 12vw, 3rem);
  }

  .topic-section,
  .timeline-card,
  .archive-card,
  .card {
    padding: var(--space-4);
    border-radius: var(--radius-md);
  }

  pre {
    padding: var(--space-4);
    border-radius: var(--radius-sm);
  }
}

/* -------------------------------------------------------------------------- */
/* Website v3 hierarchy, breadcrumbs, and automatic regions                   */
/* -------------------------------------------------------------------------- */

.nav-menu > summary {
  gap: var(--space-2);
}

.nav-summary-label {
  color: inherit;
}

.nav-menu-overview {
  display: block;
  margin: 0 0 var(--space-3);
  padding: 0.55rem 0.62rem var(--space-3);
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 820;
  letter-spacing: 0.055em;
  text-decoration: none;
  text-transform: uppercase;
}

.nav-menu-overview:hover,
.nav-menu-overview.active {
  color: var(--accent-strong);
}

.nav-caret {
  width: 1rem;
  line-height: 1;
  color: var(--text-faint);
  transition: transform var(--transition);
}

.nav-caret::before {
  content: "\25BE";
  display: block;
  font-size: 1rem;
  text-align: center;
}

.nav-menu[open] .nav-caret {
  transform: rotate(180deg);
}

.nav-menu > summary::after {
  content: none;
}

.nav-dropdown {
  width: min(34rem, calc(100vw - 2rem));
  max-height: min(72vh, 38rem);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

.nav-submenu {
  min-width: 0;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
}

.nav-submenu + .nav-submenu {
  margin-top: var(--space-2);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}

.nav-submenu.active {
  background: var(--accent-soft);
}

.nav-submenu-title {
  display: inline-flex;
  align-items: center;
  margin-bottom: var(--space-2);
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 820;
  letter-spacing: 0.065em;
  text-decoration: none;
  text-transform: uppercase;
}

.nav-submenu-title:hover {
  color: var(--accent-strong);
}

.nav-submenu-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
  gap: var(--space-1) var(--space-3);
}

.nav-topics-dropdown {
  width: clamp(42rem, 78vw, 58rem);
  max-width: calc(100vw - 2rem);
  transform: translateX(var(--nav-viewport-shift, 0));
}

.nav-topics-dropdown .nav-menu-overview {
  margin-bottom: var(--space-4);
}

.nav-topic-tree {
  columns: 17rem 3;
  column-gap: var(--space-4);
}

.nav-topic-group {
  display: inline-block;
  width: 100%;
  margin: 0 0 var(--space-3);
  break-inside: avoid;
  vertical-align: top;
}

.nav-topics-dropdown .nav-submenu + .nav-submenu {
  margin-top: 0;
  padding-top: var(--space-2);
  border-top: 0;
}

@media (min-width: 52.01rem) {
  .nav-menu[open] > .nav-topics-dropdown,
  .nav-menu:hover > .nav-topics-dropdown,
  .nav-menu:focus-within > .nav-topics-dropdown {
    display: block;
  }
}

.nav-post-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: var(--space-3);
}

.nav-post-link span {
  min-width: 0;
}

.nav-post-link time {
  color: var(--text-faint);
  font-size: 0.7rem;
  white-space: nowrap;
}

.breadcrumbs {
  width: min(calc(100% - 2rem), var(--page-width));
  margin: var(--space-5) auto 0;
  color: var(--text-faint);
  font-size: 0.82rem;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  line-height: 1.4;
}

.breadcrumbs li + li::before {
  content: "›";
  color: var(--border-strong);
  font-weight: 800;
}

.breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--accent-strong);
}

.auto-region {
  margin: var(--space-6) 0;
}

.card-kicker {
  margin: 0 0 var(--space-2);
  color: var(--text-faint);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.095em;
  text-transform: uppercase;
}

.post-adjacent {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
}

.post-adjacent a {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.post-adjacent a:hover {
  border-color: var(--accent-border);
  background: var(--bg-soft);
  transform: translateY(-1px);
}

.post-adjacent span {
  color: var(--text-faint);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.post-adjacent strong {
  color: var(--text);
  line-height: 1.35;
}

.post-newer {
  text-align: right;
}

.page-role-not-found main {
  min-height: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.page-role-not-found .page-header h1 {
  font-size: clamp(2.4rem, 8vw, 4.8rem);
}

@media (max-width: 52rem) {
  .site-nav {
    max-height: min(70vh, 32rem);
    max-height: min(70dvh, 32rem);
    overflow-y: auto;
  }

  .nav-summary-label {
    flex: 1 1 auto;
  }

  .nav-dropdown {
    width: 100%;
    max-height: none;
    overflow: visible;
  }

  .nav-submenu-links {
    display: block;
  }

  .nav-topics-dropdown {
    display: block;
    width: 100%;
    max-width: none;
    transform: none;
  }

  .nav-topic-tree {
    columns: 1;
  }

  .nav-post-link {
    display: flex;
    justify-content: space-between;
  }

  .breadcrumbs {
    width: min(calc(100% - 1.5rem), var(--content-width));
    margin-top: var(--space-4);
  }
}

@media (max-width: 36rem) {
  .post-adjacent {
    grid-template-columns: 1fr;
  }

  .post-newer {
    text-align: left;
  }
}

/* -------------------------------------------------------------------------- */
/* Reduced motion and print                                                   */
/* -------------------------------------------------------------------------- */

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

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

@media print {
  :root {
    --bg: #ffffff;
    --bg-elevated: #ffffff;
    --bg-soft: #f3f3f3;
    --bg-code: #f5f5f5;
    --text: #111111;
    --text-muted: #333333;
    --text-faint: #555555;
    --border: #cccccc;
    --border-strong: #999999;
    --accent: #222222;
    --accent-strong: #000000;
    --accent-soft: transparent;
    --accent-border: #999999;
    --shadow: none;
    --shadow-sm: none;
  }

  body {
    background: #ffffff;
    color: #111111;
  }

  .site-nav,
  .site-footer,
  .timeline-lane-headings {
    display: none;
  }

  main,
  .page-role-developer-blog main {
    width: 100%;
    max-width: none;
    padding: 0;
  }

  a {
    color: inherit;
    text-decoration: underline;
  }

  .topic-section,
  .card,
  .timeline-card,
  .archive-card,
  pre,
  blockquote {
    break-inside: avoid;
    box-shadow: none;
  }

  .timeline-stream::before {
    display: none;
  }
}