/* ahmedhani.com: QA Lab
   Dark test bench, square panels with hard offset shadows, IBM Plex for headings and
   reading, pixel type only for TC tags, stamps and buttons. A tester (magnifying glass)
   chases a pixel bug through the defect lifecycle under the hero. A pixel bug walks along the route under the hero.
   Logical properties only, so an Arabic RTL version can be added under /ar/. */

/* ---------- Fonts (self-hosted latin subsets, OFL-1.1, see docs/font-licenses.md) ---------- */

@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/ibm-plex-sans-latin-500-normal.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2");
}

@font-face {
  font-family: "Silkscreen";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../fonts/silkscreen-latin-700-normal.woff2") format("woff2");
}

/* ---------- Tokens ---------- */

:root {
  color-scheme: light dark;

  /* Light: the same bench in daylight. Square white panels, grey hard shadows. */
  --base: #EEF2F1;
  --deck: #FFFFFF;
  --rule: #A3B3B1;
  --control: #687977;
  --text: #0E1A1F;
  --dim: #435359;
  --mint: #096B4F;
  --on-mint: #FFFFFF;
  --fail: #B3261E;
  --on-fail: #FFFFFF;
  --grid: rgb(14 26 31 / 0.07);
  --hard: #C3CECC;

  /* Same in both modes */
  --amber: #FFC857;
  --coral: #FF7B72;
  --ink: #0E1A1F;

  --sx: 4px;
  --shadow: var(--sx) 4px 0 var(--hard);
  --shadow-small: calc(var(--sx) * 0.75) 3px 0 var(--hard);

  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --pixel: "Silkscreen", var(--mono);

  --gutter: 1rem;
  --wrap: 72.5rem;
}

[dir="rtl"] {
  --sx: -4px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --base: #0D1117;
    --deck: #151B23;
    --rule: #3F4C5D;
    --control: #6F7E91;
    --text: #E6EDF3;
    --dim: #B0BBC7;
    --mint: #3DD6A0;
    --on-mint: #04221A;
    --fail: #FF7B72;
    --on-fail: #0E1A1F;
    --grid: rgb(230 237 243 / 0.05);
    --hard: #05080B;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --base: #0D1117;
  --deck: #151B23;
  --rule: #3F4C5D;
  --control: #6F7E91;
  --text: #E6EDF3;
  --dim: #B0BBC7;
  --mint: #3DD6A0;
  --on-mint: #04221A;
  --fail: #FF7B72;
  --on-fail: #0E1A1F;
  --grid: rgb(230 237 243 / 0.05);
  --hard: #05080B;
}

:root[data-theme="light"] {
  color-scheme: light;
}

@media (min-width: 48rem) {
  :root {
    --gutter: 2rem;
  }
}

/* ---------- Base ---------- */

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

html {
  scroll-padding-block-start: 5rem;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--base);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
dd,
pre {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
}

a:hover {
  color: var(--mint);
}

abbr {
  text-decoration: none;
}

:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: 3px;
}

main:focus {
  outline: none;
}

.wrap {
  inline-size: 100%;
  max-inline-size: calc(var(--wrap) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.sr-only {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.symbols {
  position: absolute;
  inline-size: 0;
  block-size: 0;
  overflow: hidden;
}

.skip {
  position: absolute;
  inset-inline-start: 1rem;
  inset-block-start: -5rem;
  z-index: 40;
  display: inline-flex;
  align-items: center;
  min-block-size: 2.75rem;
  padding-inline: 1rem;
  background: var(--text);
  color: var(--base);
}

.skip:focus {
  inset-block-start: 0.75rem;
}

/* ---------- Shared pieces ---------- */

.panel {
  background: var(--deck);
  border: 2px solid var(--rule);
  box-shadow: var(--shadow);
}

.panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 0.75rem;
  padding: 0.625rem 1rem;
  border-block-end: 2px solid var(--rule);
}

.panel-title {
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.3;
}

.panel-body {
  padding: 1.125rem;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-block-size: 3.25rem;
  padding-inline: 1.75rem;
  border: 2px solid var(--control);
  box-shadow: var(--shadow-small);
  font-family: var(--pixel);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
}

.btn-mint {
  background: var(--mint);
  border-color: var(--mint);
  color: var(--on-mint);
}

.btn-mint:hover {
  background: var(--text);
  border-color: var(--text);
  color: var(--base);
}

.btn-dark {
  background: var(--deck);
  color: var(--text);
}

.btn-dark:hover {
  border-color: var(--mint);
  color: var(--text);
}

.btn-small {
  min-block-size: 2.75rem;
  padding-inline: 1.25rem;
  font-size: 0.8125rem;
}

.intro {
  max-inline-size: 60ch;
  margin-block-end: 1.75rem;
  color: var(--dim);
}

.star {
  flex: none;
  inline-size: 1.125rem;
  block-size: 0.875rem;
  fill: var(--mint);
}

/* ---------- Header ---------- */

.masthead {
  position: relative;
  z-index: 20;
  background: var(--deck);
  border-block-end: 2px solid var(--rule);
}

.masthead-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 1rem;
  min-block-size: 3.75rem;
}

.brand {
  display: inline-grid;
  place-items: center;
  min-block-size: 2.75rem;
  min-inline-size: 2.75rem;
  margin-inline-end: 1rem;
}

.brand-bug {
  flex: none;
  inline-size: 2rem;
  block-size: 2rem;
}

.sections-nav {
  display: flex;
  align-items: center;
  margin-inline-end: auto;
}

.menu-list a {
  display: inline-flex;
  align-items: center;
  min-block-size: 2.75rem;
  padding-inline: 0.625rem;
  font-family: var(--pixel);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
  text-decoration: none;
}

.menu-list a:hover {
  color: var(--mint);
}

.menu-button {
  display: inline-flex;
  align-items: center;
  min-block-size: 2.75rem;
  min-inline-size: 2.75rem;
  padding-inline: 1rem;
  background: var(--deck);
  color: var(--text);
  border: 2px solid var(--control);
  box-shadow: var(--shadow-small);
  font-family: var(--pixel);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
}

.menu-button:hover {
  border-color: var(--mint);
}

.menu-button[aria-expanded="true"] {
  background: var(--text);
  color: var(--base);
  border-color: var(--text);
}

.menu-button {
  display: none;
}

/* Theme switch: an environment selector with two options, sun (Light) and moon (Dark).
   The active option is filled mint and its status LED is lit; the other LED is hollow. */
.mode-switch {
  display: inline-flex;
  flex: none;
  align-items: stretch;
  gap: 0.1875rem;
  padding: 0.1875rem;
  background: var(--deck);
  border: 2px solid var(--control);
  box-shadow: var(--shadow-small);
  color: var(--dim);
  font-family: var(--pixel);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
}

.mode-switch:hover {
  border-color: var(--mint);
}

.mode-switch[hidden] {
  display: none;
}

.mode-opt {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  min-block-size: 2.125rem;
  padding-inline: 0.4375rem 0.5rem;
}

.mode-led {
  flex: none;
  inline-size: 0.375rem;
  block-size: 0.375rem;
  border: 1.5px solid currentColor;
}

.mode-icon {
  flex: none;
  inline-size: 1rem;
  block-size: 1rem;
  fill: currentColor;
}

.mode-switch[aria-pressed="false"] .mode-opt-light,
.mode-switch[aria-pressed="true"] .mode-opt-dark {
  background: var(--mint);
  color: var(--on-mint);
}

.mode-switch[aria-pressed="false"] .mode-opt-light .mode-led,
.mode-switch[aria-pressed="true"] .mode-opt-dark .mode-led {
  background: currentColor;
}

.mode-switch[aria-pressed="false"]:hover .mode-opt-dark,
.mode-switch[aria-pressed="true"]:hover .mode-opt-light {
  color: var(--text);
}

/* Phones: the bar holds the logo, Menu and this switch, so the switch tightens up */
@media (max-width: 23.99rem) {
  .mode-switch {
    font-size: 0.625rem;
    letter-spacing: 0.06em;
  }

  .mode-opt {
    gap: 0.25rem;
    padding-inline: 0.3125rem;
  }
}

@media (min-width: 80rem) {
  .masthead {
    position: sticky;
    inset-block-start: 0;
  }

  .menu-list {
    display: flex;
    gap: 0.25rem;
  }
}

/* Narrow screens without JS: links wrap under the brand */
@media (max-width: 79.99rem) {
  .sections-nav {
    order: 3;
    flex-basis: 100%;
  }

  .menu-list {
    display: flex;
    flex-wrap: wrap;
    margin-inline-start: -0.75rem;
    padding-block-end: 0.5rem;
  }

  /* With JS: a Menu button opens the list as a panel */
  .js .masthead {
    position: sticky;
    inset-block-start: 0;
  }

  .js .masthead-bar {
    flex-wrap: nowrap;
    gap: 0.625rem;
  }

  .js .sections-nav {
    order: 0;
    flex-basis: auto;
    margin-inline-start: auto;
    margin-inline-end: 0;
  }

  .js .brand {
    margin-inline-end: 0;
  }

  .js .menu-button {
    display: inline-flex;
  }

  .js .menu-list {
    display: none;
    position: absolute;
    inset-inline: 0;
    inset-block-start: 100%;
    margin: 0;
    padding: 0.5rem var(--gutter) 1rem;
    background: var(--deck);
    border-block-end: 2px solid var(--rule);
  }

  .js .sections-nav.is-open .menu-list {
    display: block;
  }

  .js .menu-list a {
    display: flex;
    min-block-size: 3rem;
    padding-inline: 0;
    font-size: 0.875rem;
    color: var(--text);
  }
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding-block-start: clamp(2.5rem, 4.5vw, 4.25rem);
  background-image:
    linear-gradient(to right, var(--grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size: 30px 30px;
  background-position: center top;
}

.prompt {
  font-family: var(--mono);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--mint);
}

.prompt::before {
  content: "> ";
}

.prompt::after {
  content: "_";
}

.hero-name {
  margin-block-start: 1rem;
  font-size: clamp(2.375rem, 1.4rem + 3.8vw, 4.25rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.015em;
}

.hero-role {
  display: inline-block;
  margin-block-start: 1.25rem;
  padding-block-end: 0.375rem;
  border-block-end: 4px solid var(--mint);
  font-size: clamp(1.375rem, 1.1rem + 1vw, 1.875rem);
  font-weight: 600;
  line-height: 1.25;
}

.hero-lead {
  max-inline-size: 52ch;
  margin-block-start: 1.75rem;
  font-size: clamp(1.125rem, 1rem + 0.4vw, 1.3125rem);
  line-height: 1.6;
  color: var(--dim);
}

.certs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-block: 1.75rem 2.25rem;
}

.certs li {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.75rem;
  border: 2px solid var(--mint);
  font-family: var(--mono);
  font-size: 0.9375rem;
  color: var(--mint);
}

/* The route: a tester (magnifying glass) chases a bug along the line. The five lifecycle
   steps light up in turn, and a PASS stamp lands when the bug is caught.
   Default (no JS, reduced motion) is the finished state; .is-running resets it for the story. */
.route {
  margin-block-start: clamp(1.75rem, 3vw, 2.5rem);
}

.route-stage {
  position: relative;
  padding-block-end: 1.875rem;
}

.route-svg {
  display: block;
}

[dir="rtl"] .route-svg {
  transform: scaleX(-1);
}

.route-line {
  fill: none;
  stroke: var(--rule);
  stroke-width: 2;
}

.route-bug {
  fill: var(--fail);
}

.route-lens {
  fill: var(--mint);
}

html:not(.js) .route-bug,
html:not(.js) .route-lens {
  display: none;
}

.route-steps li {
  position: absolute;
  inset-block-start: 38px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  inline-size: 0;
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.2;
  white-space: nowrap;
  color: var(--text);
}

.route-steps li::before {
  content: "";
  inline-size: 0.75rem;
  block-size: 0.75rem;
  background: var(--mint);
  border: 2px solid var(--mint);
}

.route-steps li:nth-child(1) { inset-inline-start: 6%; }
.route-steps li:nth-child(2) { inset-inline-start: 26%; }
.route-steps li:nth-child(3) { inset-inline-start: 46%; }
.route-steps li:nth-child(4) { inset-inline-start: 66%; }
.route-steps li:nth-child(5) { inset-inline-start: 87%; }

.route.is-running .route-steps li:not(.is-lit) {
  color: var(--dim);
}

.route.is-running .route-steps li:not(.is-lit)::before {
  background: var(--base);
  border-color: var(--rule);
}

.route-stamp {
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: calc(87% - 8.75rem);
  padding: 0.25rem 0.5rem 0.125rem;
  border: 3px solid var(--mint);
  background: var(--deck);
  color: var(--mint);
  font-family: var(--pixel);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transform: rotate(-8deg);
}

.route.is-running .route-stamp:not(.is-shown) {
  opacity: 0;
  transform: rotate(-8deg) scale(1.8);
}

.route-foot {
  display: flex;
  justify-content: flex-end;
  padding-block-end: 0.75rem;
}

.route-replay {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-block-size: 2.75rem;
  padding-inline: 0.875rem;
  background: var(--deck);
  border: 2px solid var(--control);
  box-shadow: var(--shadow-small);
  color: var(--text);
  font-family: var(--pixel);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
}

.route-replay:hover {
  border-color: var(--mint);
}

.route-replay[hidden] {
  display: none;
}

.route-replay svg {
  inline-size: 0.875rem;
  block-size: 0.875rem;
  fill: var(--mint);
}

@media (max-width: 29.99rem) {
  .route-steps li {
    font-size: 0.6875rem;
  }

  .route-steps li:nth-child(1) { inset-inline-start: 7%; }
  .route-steps li:nth-child(5) { inset-inline-start: 89%; }

  .route-stamp {
    inset-inline-start: calc(89% - 7.5rem);
    font-size: 0.875rem;
  }
}

/* ---------- Sections ---------- */

.section {
  padding-block-start: clamp(4rem, 8vw, 6.5rem);
}

.section:last-of-type {
  padding-block-end: clamp(4rem, 8vw, 6.5rem);
}

.section-head {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-block-end: 1.75rem;
}

.section-head::after {
  content: "";
  flex: 1 1 1.5rem;
  border-block-start: 2px dashed var(--rule);
}

.tc-label {
  flex: none;
  padding: 0.3125rem 0.625rem 0.25rem;
  border: 2px solid var(--mint);
  font-family: var(--pixel);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.4;
  color: var(--mint);
}

/* PASS tick: main.js adds .is-pass once the section scrolls into view.
   The filled segment sits inside the tag's border, flush with its inline end. */
.tc-pass {
  display: none;
  align-items: center;
  gap: 0.3125rem;
  margin-block: -0.3125rem -0.25rem;
  margin-inline: 0.5rem -0.625rem;
  padding: 0.3125rem 0.5rem 0.25rem;
  background: var(--mint);
  color: var(--on-mint);
}

.tc-pass svg {
  inline-size: 0.75rem;
  block-size: 0.75rem;
  fill: currentColor;
}

.js .tc-label.is-pass .tc-pass {
  display: inline-flex;
}

.section-title {
  font-size: clamp(1.625rem, 1.2rem + 1.6vw, 2.375rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.sub-title {
  margin-block: 2.25rem 1.125rem;
  font-size: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
  font-weight: 600;
  line-height: 1.25;
}

.sub-title:first-of-type {
  margin-block-start: 0;
}

/* About */

.about-grid {
  display: grid;
  gap: 2.5rem;
}

.copy {
  max-inline-size: 64ch;
}

.copy p + p {
  margin-block-start: 1.1em;
}

.about-copy {
  display: grid;
  gap: 1.25rem;
}

.about-copy h3 {
  margin-block-end: 0.25rem;
  font-family: var(--mono);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--mint);
}

.about-copy h3::before {
  content: "// ";
  color: var(--dim);
}

.env {
  align-self: start;
}

.env-list {
  padding: 0.5rem 1.125rem 0.75rem;
}

.env-list div {
  display: grid;
  grid-template-columns: 7rem minmax(0, 1fr);
  gap: 1rem;
  padding-block: 0.625rem;
}

.env-list div + div {
  border-block-start: 2px dashed var(--rule);
}

.env-list dt {
  font-family: var(--mono);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--dim);
  padding-block-start: 0.15rem;
}

@media (min-width: 64rem) {
  .about-grid {
    grid-template-columns: minmax(0, 1fr) 23.5rem;
    gap: 3.5rem;
  }
}

/* What I test */

.matrix {
  padding: 0.5rem 1.375rem 1.375rem;
}

.matrix-row {
  display: grid;
  gap: 0.75rem;
  padding-block: 1.375rem;
}

.matrix-row + .matrix-row {
  border-block-start: 2px dashed var(--rule);
}

.tc-id {
  font-family: var(--pixel);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--mint);
}

.matrix-name h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
}

.matrix-text {
  max-inline-size: 64ch;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  align-content: start;
  gap: 0.5rem;
}

.tags li {
  padding: 0.2rem 0.6rem;
  border: 2px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.875rem;
  color: var(--dim);
}

@media (min-width: 64rem) {
  .matrix-row {
    grid-template-columns: 13.5rem minmax(0, 1fr) 19.5rem;
    gap: 1.5rem;
  }
}

.lifecycle {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0;
  padding-block-start: 0.5rem;
}

.lifecycle li {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
}

.lifecycle li:last-child {
  flex: none;
}

.lifecycle li:not(:last-child)::after {
  content: "";
  flex: 1 1 1rem;
  margin-inline: 0.5rem;
  border-block-start: 2px dashed var(--rule);
}

/* Phones: the lifecycle wraps, so the connectors give way to plain gaps */
@media (max-width: 47.99rem) {
  .lifecycle {
    gap: 0.5rem;
  }

  .lifecycle li,
  .lifecycle li:last-child {
    flex: none;
  }

  .lifecycle li:not(:last-child)::after {
    content: none;
  }

  .section-head::after {
    min-inline-size: 1.5rem;
  }
}

@media (max-width: 29.99rem) {
  .section-head {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .section-head .section-title {
    flex-basis: 100%;
  }

  .section-head::after {
    content: none;
  }
}

.lifecycle span {
  padding: 0.375rem 0.75rem;
  border: 2px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.875rem;
  color: var(--dim);
}

/* Experience */

.job {
  padding: clamp(1.25rem, 3vw, 1.75rem);
}

.job-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 1.5rem;
}

.job-head h3 {
  font-size: 1.375rem;
  font-weight: 600;
}

.job-meta {
  font-family: var(--mono);
  font-size: 0.9375rem;
  color: var(--dim);
}

.job-sub {
  margin-block: 0.25rem 1.25rem;
  color: var(--dim);
}

.job-points {
  display: grid;
  gap: 0.75rem;
  max-inline-size: 68ch;
  counter-reset: point;
}

.job-points li {
  position: relative;
  padding-inline-start: 2.25rem;
  counter-increment: point;
}

.job-points li::before {
  content: counter(point, decimal-leading-zero);
  position: absolute;
  inset-inline-start: 0;
  font-family: var(--mono);
  color: var(--mint);
}

/* Certifications and education */

.cards-2 {
  display: grid;
  gap: 1.375rem;
}

.cert-card {
  display: flex;
  gap: 1.125rem;
  padding: 1.375rem 1.5rem 1.5rem;
}

.card-icon {
  flex: none;
  inline-size: 2.25rem;
  block-size: 1.75rem;
  margin-block-start: 0.125rem;
  fill: var(--mint);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.35;
}

.card-meta {
  margin-block-start: 0.5rem;
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--dim);
}

.featured-card {
  display: flex;
  gap: 1.25rem;
  margin-block-end: 1.375rem;
  padding: clamp(1.375rem, 3vw, 2rem);
  border-color: var(--mint);
}

.featured-icon {
  inline-size: 3rem;
  block-size: 2.375rem;
}

.stamp {
  display: inline-block;
  padding: 0.3125rem 0.625rem 0.25rem;
  background: var(--amber);
  color: var(--ink);
  font-family: var(--pixel);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.featured-title {
  margin-block-start: 0.75rem;
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  font-weight: 600;
  line-height: 1.2;
}

.featured-meta {
  display: flex;
  flex-wrap: wrap;
  margin-block-start: 0.625rem;
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--dim);
}

.featured-meta li + li::before {
  content: "·";
  margin-inline: 0.625rem;
}

.featured-why {
  max-inline-size: 60ch;
  margin-block-start: 1rem;
  font-size: 1.125rem;
}

.also-learning {
  margin-block-start: 1.375rem;
  color: var(--dim);
}

.also-label {
  margin-inline-end: 0.5rem;
  padding: 0.125rem 0.5rem;
  border: 2px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.875rem;
  color: var(--text);
}

@media (max-width: 29.99rem) {
  .featured-card {
    flex-direction: column;
    gap: 0.75rem;
  }
}

@media (min-width: 48rem) {
  .cards-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* Contact */

.contact-grid {
  display: grid;
  gap: 1.5rem;
  align-items: start;
}

.contact-form {
  display: grid;
  gap: 1.25rem;
  padding: clamp(1.25rem, 3vw, 1.75rem);
}

.form-intro {
  color: var(--dim);
}

.field {
  display: grid;
  gap: 0.375rem;
}

.field label {
  font-weight: 600;
}

.field input,
.field textarea {
  inline-size: 100%;
  min-block-size: 3rem;
  padding: 0.625rem 0.875rem;
  background: var(--base);
  border: 2px solid var(--control);
  border-radius: 0;
  color: var(--text);
  font: inherit;
}

.field textarea {
  min-block-size: 9rem;
  resize: vertical;
}

.field input:hover,
.field textarea:hover {
  border-color: var(--mint);
}

.field input:focus-visible,
.field textarea:focus-visible {
  outline-offset: 0;
  border-color: var(--mint);
}

.field [aria-invalid="true"] {
  border-color: var(--fail);
}

.field-error {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--fail);
}

.field-error::before {
  content: "✕ ";
}

.field-error[hidden] {
  display: none;
}

/* Honeypot: off screen, out of the tab order and the accessibility tree */
.hp {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.form-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.25rem;
}

.form-status {
  font-size: 0.9375rem;
  color: var(--dim);
}

.form-status[data-state="pass"] {
  color: var(--mint);
  font-weight: 600;
}

.form-status[data-state="fail"] {
  color: var(--fail);
  font-weight: 600;
}

/* Results after a post without JS: the function redirects to one of these ids */
.form-result {
  padding: 0.75rem 1rem;
  border: 2px solid var(--mint);
  font-weight: 600;
  color: var(--mint);
}

.form-result-fail {
  border-color: var(--fail);
  color: var(--fail);
}

.form-result:not(:target) {
  display: none;
}

.contact-main {
  display: grid;
  gap: 1rem;
}

.contact-email {
  font-size: 1.0625rem;
}

.contact-email a {
  color: var(--mint);
  font-weight: 500;
  overflow-wrap: anywhere;
}

.contact-email a:hover {
  color: var(--text);
}

.contact-side {
  display: grid;
  gap: 1.25rem;
  padding: clamp(1.25rem, 3vw, 1.75rem);
}

.contact-line {
  font-size: 1.125rem;
}

.contact-side .btn {
  inline-size: 100%;
}

@media (min-width: 64rem) {
  .contact-grid {
    grid-template-columns: minmax(0, 1fr) 21rem;
    gap: 2rem;
  }
}

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

.footer {
  background: var(--deck);
  border-block-start: 2px solid var(--rule);
}

.footer-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding-block: 1.5rem;
  font-size: 0.9375rem;
  color: var(--dim);
}

.back-top {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-block-size: 2.75rem;
  padding-inline: 0.875rem 1rem;
  background: var(--deck);
  border: 2px solid var(--control);
  box-shadow: var(--shadow-small);
  color: var(--text);
  font-family: var(--pixel);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
}

.back-top:hover {
  border-color: var(--mint);
  color: var(--text);
}

.back-top svg {
  inline-size: 1rem;
  block-size: 1rem;
  fill: var(--mint);
}

/* ---------- 404 ---------- */

.lost {
  min-block-size: calc(100vh - 4rem);
  padding-block: clamp(3rem, 10vw, 7rem);
}

.test-case {
  max-inline-size: 40rem;
  padding: clamp(1.25rem, 4vw, 2rem);
}

.test-case-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.stamp-fail {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  background: var(--fail);
  color: var(--on-fail);
}

.stamp-fail svg {
  inline-size: 0.625rem;
  block-size: 0.625rem;
  fill: currentColor;
}

.lost .section-title {
  margin-block: 1.25rem 0.75rem;
  font-size: clamp(1.75rem, 1rem + 3vw, 3rem);
}

.test-case-steps {
  margin-block-end: 1.75rem;
  padding-inline: 0;
}

@media (max-width: 29.99rem) {
  .test-case-steps div {
    grid-template-columns: 5.5rem minmax(0, 1fr);
  }

  .test-case .btn {
    inline-size: 100%;
    padding-inline: 0.75rem;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-align: center;
  }
}

/* ---------- Cursors and the scanner ---------- */

/* Pixel cursors on mouse-like pointers only, drawn on a 2 px grid so every edge is sharp.
   The arrow's hotspot is its tip (0 0); the hand's is the top of the fingertip (10 1). */
@media (pointer: fine) and (forced-colors: none) {
  html {
    cursor: url("../img/cursor-arrow.svg") 0 0, auto;
  }

  a,
  button:not(:disabled),
  summary,
  [role="button"],
  label[for],
  select,
  input[type="checkbox"],
  input[type="radio"],
  .btn,
  .menu-button,
  .mode-switch,
  .route-replay,
  .back-top {
    cursor: url("../img/cursor-hand.svg") 10 1, pointer;
  }
}

/* A small reticle that trails the mouse and opens up over anything you can click.
   main.js creates it only for fine pointers without reduced motion. */
.scanner {
  position: fixed;
  inset-block-start: 0;
  inset-inline-start: 0;
  z-index: 50;
  inline-size: 30px;
  block-size: 30px;
  pointer-events: none;
  opacity: 0;
  background:
    linear-gradient(var(--mint) 0 0) 0 0 / 8px 2px,
    linear-gradient(var(--mint) 0 0) 0 0 / 2px 8px,
    linear-gradient(var(--mint) 0 0) 100% 0 / 8px 2px,
    linear-gradient(var(--mint) 0 0) 100% 0 / 2px 8px,
    linear-gradient(var(--mint) 0 0) 0 100% / 8px 2px,
    linear-gradient(var(--mint) 0 0) 0 100% / 2px 8px,
    linear-gradient(var(--mint) 0 0) 100% 100% / 8px 2px,
    linear-gradient(var(--mint) 0 0) 100% 100% / 2px 8px;
  background-repeat: no-repeat;
  transition: opacity 0.2s, scale 0.18s;
  will-change: translate;
}

.scanner.is-on {
  opacity: 0.85;
}

.scanner.is-target {
  scale: 1.5;
}

button:disabled {
  cursor: not-allowed;
}

input[type="text"],
input[type="search"],
input[type="email"],
textarea {
  cursor: text;
}

/* ---------- Motion ---------- */

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }

  body,
  .masthead,
  .panel,
  .btn,
  .menu-button,
  .mode-switch,
  .menu-list a,
  .field input,
  .field textarea {
    transition: background-color 0.15s, border-color 0.15s, color 0.15s;
  }

  .mode-opt,
  .back-top,
  .route-replay {
    transition: background-color 0.15s, border-color 0.15s, color 0.15s;
  }

  /* The LED of the option you switch to blinks twice, like a status light settling */
  .mode-switch.is-switching[aria-pressed="false"] .mode-opt-light .mode-led,
  .mode-switch.is-switching[aria-pressed="true"] .mode-opt-dark .mode-led {
    animation: led-blink 0.48s steps(1, end);
  }

  .route-steps li::before {
    transition: background-color 0.2s, border-color 0.2s;
  }

  .js .tc-label.is-pass .tc-pass {
    animation: tc-pass 0.36s steps(3, end);
  }

  .route.is-running .route-stamp.is-shown {
    transition: opacity 0.12s, transform 0.22s steps(3, end);
  }
}

@keyframes tc-pass {
  from {
    opacity: 0;
    transform: scale(0.6);
  }
}

@keyframes led-blink {
  25%,
  75% {
    background: transparent;
  }
}

/* ---------- Print ---------- */

@media print {
  :root,
  :root[data-theme="dark"] {
    color-scheme: light;
    --base: #FFFFFF;
    --deck: #FFFFFF;
    --rule: #BBBBBB;
    --text: #000000;
    --dim: #333333;
    --mint: #000000;
    --hard: transparent;
  }

  .masthead,
  .skip,
  .route,
  .scanner,
  .contact-form {
    display: none !important;
  }

  .hero {
    background: none;
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    overflow-wrap: anywhere;
  }
}

@media print and (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: light;
    --base: #FFFFFF;
    --deck: #FFFFFF;
    --rule: #BBBBBB;
    --text: #000000;
    --dim: #333333;
    --mint: #000000;
    --hard: transparent;
  }
}