:root {
  color-scheme: light;
  --page: #f6f4ed;
  --paper: #fffdf7;
  --ink: #18213a;
  --ink-deep: #111a30;
  --muted: #505b6c;
  --line: #d8dace;
  --orange: #bf3c17;
  --orange-hover: #9d2d0e;
  --orange-pale: #fbe8db;
  --green: #254b39;
  --green-pale: #e8efe5;
  --terminal: #111a30;
  --terminal-chrome: #202c48;
  --mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: Georgia, "Times New Roman", serif;
  --shell: 74rem;
  --radius: .9rem;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--page);
  line-height: 1.55;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 6rem; }
body { margin: 0; overflow-wrap: anywhere; }
a { color: inherit; }
a:hover { color: var(--orange-hover); }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: default; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; }
h1, h2, h3, h4, p { margin: 0; }
h1, h2, h3, h4 { line-height: 1.15; overflow-wrap: anywhere; }
code, pre { font-family: var(--mono); }
code { overflow-wrap: anywhere; }
pre { margin: 0; tab-size: 2; }
img, svg { vertical-align: middle; }
::selection { color: var(--ink-deep); background: #f7c5ac; }

.shell { width: min(var(--shell), calc(100% - 5rem)); margin-inline: auto; }
.skip-link {
  position: fixed;
  z-index: 100;
  inset: .7rem auto auto .7rem;
  transform: translateY(-150%);
  background: var(--paper);
  padding: .7rem 1rem;
  border-radius: .4rem;
  color: var(--ink);
}
.skip-link:focus { transform: none; }

.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 5;
  border-bottom: 1px solid var(--line);
  background: var(--page);
}
.header-inner {
  min-height: 4.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: .65rem;
  color: var(--ink-deep);
  text-decoration: none;
}
.brand-mark {
  width: 2.25rem;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  color: #fff9f0;
  background: var(--orange);
  border-radius: .5rem;
  font-family: var(--mono);
  font-size: .85rem;
  line-height: 1;
  font-weight: 800;
}
.brand-copy { font-size: 1rem; font-weight: 720; letter-spacing: -.035em; line-height: 1.15; }
.brand-copy strong { font-weight: 830; }
.brand-copy small, .brand-copy span + span {
  font: 600 .59rem/1.25 var(--mono);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .08em;
}
.nav-links { display: flex; align-items: center; gap: clamp(.8rem, 2.6vw, 2.5rem); }
.nav-links a {
  color: var(--muted);
  font-size: .86rem;
  font-weight: 650;
  text-decoration: none;
}
.nav-links a:hover { color: var(--orange-hover); text-decoration: underline; text-underline-offset: .25em; }
.header-action { flex: 0 0 auto; }
.header-action.button { min-height: 2.55rem; padding: .52rem .85rem; font-size: .82rem; }

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: .48rem;
  min-height: 2.75rem;
  padding: .65rem 1rem;
  border: 1px solid transparent;
  border-radius: .48rem;
  color: var(--ink-deep);
  background: transparent;
  text-decoration: none;
  font-size: .88rem;
  font-weight: 720;
  line-height: 1.3;
  text-align: center;
  transition: color .18s, background-color .18s, border-color .18s;
}
.button.primary, .button-primary {
  color: #fffdf9;
  border-color: var(--orange);
  background: var(--orange);
}
.button.primary:not(:disabled):hover, .button-primary:not(:disabled):hover {
  color: #fff;
  border-color: var(--orange-hover);
  background: var(--orange-hover);
}
.button.secondary, .button-secondary {
  color: var(--ink-deep);
  border-color: #bcc7bc;
  background: var(--paper);
}
.button.secondary:not(:disabled):hover, .button-secondary:not(:disabled):hover,
.button.ghost:not(:disabled):hover, .button-ghost:not(:disabled):hover {
  color: var(--ink-deep);
  border-color: #9aaf9d;
  background: var(--green-pale);
}
.button.ghost, .button-ghost { color: var(--green); border-color: #c6d0c4; }
.button:disabled, .icon-button:disabled { opacity: .55; }

.hero {
  isolation: isolate;
  overflow: hidden;
  position: relative;
  background:
    radial-gradient(ellipse at 79% 43%, #e6eadb 0, transparent 50%),
    linear-gradient(115deg, #fbf8f0, var(--page) 62%);
}
.hero::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  content: "";
  background-image: radial-gradient(#8e9c89 1px, transparent 1px);
  background-size: 1rem 1rem;
  opacity: .3;
  mask-image: linear-gradient(90deg, transparent 46%, #000 100%);
  pointer-events: none;
}
.hero-grid {
  min-height: clamp(27rem, 42vw, 36rem);
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  padding-block: clamp(3.4rem, 7vw, 6.4rem);
}
.hero-copy { display: grid; justify-items: start; }
.eyebrow, .lesson-kicker {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  color: var(--green);
  font: 750 .72rem/1.4 var(--mono);
  letter-spacing: .1em;
  text-transform: uppercase;
}
.hero .eyebrow > span[aria-hidden="true"] { display: none; }
.hero .eyebrow::before, .section-head .eyebrow::before {
  display: block;
  width: .5rem;
  aspect-ratio: 1;
  flex: 0 0 auto;
  border-radius: .12rem;
  background: var(--orange);
  content: "";
}
.hero h1 {
  max-width: 12ch;
  margin-block: .9rem 1.25rem;
  color: var(--ink-deep);
  font-size: clamp(3rem, 6.15vw, 5.5rem);
  font-weight: 780;
  letter-spacing: -.086em;
  line-height: .98;
  text-wrap: balance;
}
.hero h1 em, .hero h1 .accent {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -.075em;
  color: var(--orange);
}
.hero-copy > p:not(.eyebrow) {
  max-width: 43ch;
  color: var(--muted);
  font-size: clamp(1rem, 1.35vw, 1.125rem);
  line-height: 1.66;
  text-wrap: pretty;
}
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; margin-top: 1.6rem; }
.hero-actions .button { min-height: 3rem; padding-inline: 1.05rem; }
.hero-visual { min-width: 0; }
.code-window {
  overflow: hidden;
  border: 1px solid #395445;
  border-radius: var(--radius);
  background: var(--terminal);
  color: #e9f0e9;
  box-shadow: 0 1.4rem 4rem #16261c28, 0 .45rem .9rem #16261c18;
}
.window-bar {
  display: flex;
  gap: .75rem;
  align-items: center;
  min-height: 2.7rem;
  padding: .6rem .95rem;
  border-bottom: 1px solid #395445;
  color: #dbeddf;
  background: var(--terminal-chrome);
  font: 600 .68rem/1.3 var(--mono);
}
.window-language { margin-inline-start: auto; color: #b3cebb; }
.window-dots { display: inline-flex; align-items: center; gap: .28rem; flex-shrink: 0; }
.window-dots:empty::before, .window-dots span, .window-dots i {
  display: block;
  width: .46rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: #fc9273;
}
.window-dots:empty::before { content: ""; margin-right: 1.5rem; box-shadow: .65rem 0 #f6ce86, 1.3rem 0 #9cc6a4; }
.window-dots :nth-child(2) { background: #f6ce86; }
.window-dots :nth-child(3) { background: #9cc6a4; }
.code-preview {
  display: block;
  overflow: auto;
  padding: 1.35rem .9rem 1.4rem;
  font: 500 clamp(.65rem, 1.18vw, .87rem)/1.83 var(--mono);
  scrollbar-color: #637b6a var(--terminal);
}
.code-preview code { display: block; overflow-wrap: normal; }
.code-preview .line-no {
  display: inline-block;
  min-width: 2.1em;
  margin-inline-end: 1em;
  color: #9eb3a4;
  text-align: end;
  user-select: none;
}
.tok-tag { color: #faad92; }
.tok-attr { color: #f5d494; }
.tok-string { color: #afe0af; }
.tok-text { color: #f5f3de; }
.window-foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: .35rem .9rem;
  min-height: 2.25rem;
  padding: .55rem .95rem;
  border-top: 1px solid #395445;
  background: #1c3126;
  color: #c6dfcd;
  font: 600 .64rem/1.4 var(--mono);
}

.stats-strip { border-block: 1px solid var(--line); background: #edece2; }
.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stat {
  display: grid;
  align-content: center;
  min-height: 5.6rem;
  gap: .13rem;
  padding: .95rem clamp(.8rem, 2vw, 1.6rem);
  border-inline-start: 1px solid var(--line);
}
.stat:last-child { border-inline-end: 1px solid var(--line); }
.stat strong { color: var(--ink-deep); font-size: clamp(1rem, 2.3vw, 1.55rem); line-height: 1.15; letter-spacing: -.045em; }
.stat span { color: var(--muted); font: 600 .65rem/1.45 var(--mono); letter-spacing: .02em; }
.section-head { margin-bottom: 1.45rem; }
.section-head h2 { margin-top: .4rem; color: var(--ink-deep); font-size: clamp(2.05rem, 4.5vw, 3.3rem); font-weight: 780; letter-spacing: -.07em; }
.section-head p:not(.eyebrow) { max-width: 62ch; margin-top: .55rem; color: var(--muted); text-wrap: pretty; }
main > .shell:not(.hero-grid), main > section > .shell:not(.hero-grid):not(.stats-grid) { padding-block: clamp(3rem, 6vw, 5.2rem); }
main > .shell + .shell { padding-top: 0; }
.section-grid, .route-grid, .method-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.section-grid > .section-head { grid-column: 1 / -1; }
.level-card, .method-card {
  min-width: 0;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}
.level-card {
  display: grid;
  grid-template-rows: auto auto 1fr auto auto;
  align-content: start;
  gap: .72rem;
  transition: border-color .18s, box-shadow .18s;
}
.level-card:hover { border-color: #a8b6a8; box-shadow: 0 .4rem 1.4rem #22362a0a; }
.level-card[data-state="current"], .level-card.current { border-color: #c48062; }
.level-card[data-state="done"], .level-card.done { border-color: #9dbba2; background: #f6faf3; }
.level-top { display: flex; justify-content: space-between; align-items: center; gap: .45rem; }
.level-num, .method-num, .step-num {
  color: var(--orange);
  font: 760 .78rem/1.2 var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
}
.pill {
  max-width: 100%;
  padding: .28rem .5rem;
  border: 1px solid #d2dbcf;
  border-radius: 1rem;
  background: #eef2ea;
  color: #365742;
  font: 700 .62rem/1.25 var(--mono);
  text-wrap: balance;
}
.level-card[data-state="current"] .pill, .level-card.current .pill { color: #853115; background: var(--orange-pale); border-color: #f1d3bf; }
.level-card h3, .method-card h3 { font-size: clamp(1.06rem, 2vw, 1.3rem); letter-spacing: -.03em; }
.level-card p, .method-card p { color: var(--muted); font-size: .89rem; line-height: 1.52; text-wrap: pretty; }
.level-progress { color: var(--muted); font: 650 .71rem/1.4 var(--mono); }
.level-card .button { justify-self: start; }
.progress-track {
  display: block;
  overflow: hidden;
  width: 100%;
  height: .4rem;
  margin-block: .28rem;
  border: 0;
  border-radius: 1rem;
  background: #dfe7dc;
}
.progress-track > span, .progress-fill { display: block; height: 100%; border-radius: inherit; background: var(--green); }
progress.progress-track { appearance: none; }
progress.progress-track::-webkit-progress-bar { background: #dfe7dc; }
progress.progress-track::-webkit-progress-value { background: var(--green); }
progress.progress-track::-moz-progress-bar { background: var(--green); }
.method-card { display: grid; align-content: start; gap: .6rem; }
.method-card strong:first-child, .method-card .eyebrow { color: var(--orange); }
.method-card a { justify-self: start; color: var(--green); font-size: .83rem; font-weight: 700; text-underline-offset: .22em; }
.method-card a:hover { color: var(--orange-hover); }
.site-footer { border-top: 1px solid var(--line); background: #eaece0; }
.footer-inner { min-height: 5.5rem; display: flex; justify-content: space-between; align-items: center; gap: .75rem 1.5rem; padding-block: 1.05rem; }
.footer-inner p, .footer-inner small, .footer-inner a { color: var(--muted); font-size: .78rem; }
.footer-inner a { text-underline-offset: .2em; }
.footer-company {
  display: flex;
  flex-wrap: wrap;
  gap: .1rem .45rem;
  margin-block-start: .3rem;
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.4;
}
.footer-inner a:hover { color: var(--orange-hover); }
.footer-inner .brand { color: var(--ink-deep); }

.modal {
  padding: 0;
  width: min(38rem, calc(100vw - 2rem));
  max-width: none;
  max-height: calc(100dvh - 2rem);
  border: 1px solid #aab9ab;
  border-radius: var(--radius);
  color: var(--ink);
  background: var(--paper);
  box-shadow: 0 1.1rem 5rem #0e1b1599;
  overflow: auto;
  overscroll-behavior: contain;
}
.modal::backdrop { background: #12221bbd; }
.modal.lesson-modal { width: min(70rem, calc(100vw - 2rem)); }
.modal-head {
  position: sticky;
  z-index: 2;
  inset-block-start: 0;
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 1rem;
  padding: 1rem clamp(1rem, 3vw, 1.45rem);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.modal-head h2 { margin-top: .15rem; font-size: clamp(1.25rem, 3.4vw, 1.85rem); letter-spacing: -.045em; }
.icon-button {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  min-width: 2.3rem;
  min-height: 2.3rem;
  padding: .2rem .45rem;
  border: 1px solid var(--line);
  border-radius: .45rem;
  background: var(--page);
  color: var(--green);
  font-size: 1.25rem;
  line-height: 1;
}
.icon-button:hover { background: var(--green-pale); }
.modal-body { padding: clamp(1rem, 3vw, 1.45rem); }
.modal-body > * + * { margin-top: 1rem; }
.modal-body > p { color: var(--muted); }
.lesson-layout { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 1.1rem; align-items: start; }
.lesson-reading, .workbench { min-width: 0; }
.lesson-reading > * + *, .workbench > * + * { margin-top: .8rem; }
.lesson-reading h3, .workbench h3 { color: var(--ink-deep); font-size: 1.15rem; letter-spacing: -.025em; }
.lesson-reading p, .workbench p { text-wrap: pretty; }
.lesson-reading pre, .example-code {
  overflow: auto;
  border: 1px solid #395445;
  border-radius: .5rem;
  padding: .8rem;
  color: #e8f0e9;
  background: var(--terminal);
  font: 500 .76rem/1.55 var(--mono);
}
.lesson-reading pre code { overflow-wrap: normal; }
.example-box {
  border: 1px solid var(--line);
  border-radius: .5rem;
  background: var(--page);
}
.example-box summary {
  padding: .58rem .68rem;
  color: var(--green);
  font-size: .86rem;
  font-weight: 700;
  cursor: pointer;
}
.example-box pre { margin: 0 .43rem .43rem; }
#project-build-list {
  display: grid;
  gap: .5rem;
  margin: 0;
  padding: 0 .75rem .75rem 1.85rem;
  color: var(--muted);
  font-size: .86rem;
}
#project-build-list li::marker,
#project-build-list strong { color: var(--green); }
.editor-label {
  display: block;
  color: var(--muted);
  font-size: .8rem;
  font-weight: 700;
}
.editor-label + .editor { margin-top: .32rem; }
.lab-note { color: var(--muted); font-size: .75rem; }
.audit-item {
  display: flex;
  align-items: baseline;
  gap: .4rem;
  padding-block: .32rem;
  color: var(--muted);
  font-size: .85rem;
}
.audit-item input { flex: 0 0 auto; accent-color: var(--green); }
.lesson-layout > .lesson-actions { grid-column: 1 / -1; margin-top: 0; border-top: 1px solid var(--line); padding-top: .85rem; }
.lesson-actions > :last-child { margin-inline-start: auto; }
.lesson-actions .feedback { flex: 1 1 14rem; }
.lesson-reading p code, .feedback code, .check-list code { padding-inline: .17em; border-radius: .17rem; background: #e9ede4; }
.tab-bar { display: flex; align-items: center; flex-wrap: wrap; gap: .35rem; }
.tab-bar > .pill { margin-inline-start: auto; }
.tab-bar button {
  min-height: 2.15rem;
  border: 1px solid var(--line);
  border-radius: .4rem;
  padding: .36rem .55rem;
  color: var(--green);
  background: var(--paper);
  font-size: .8rem;
  font-weight: 700;
}
.tab-bar button[aria-selected="true"], .tab-bar button[aria-pressed="true"], .tab-bar button.active {
  border-color: var(--green);
  color: white;
  background: var(--green);
}
.editor, .preview {
  display: block;
  width: 100%;
  min-height: 14rem;
  padding: .8rem;
  border: 1px solid #627d6a;
  border-radius: .48rem;
}
.editor {
  resize: vertical;
  color: #e5f0e7;
  caret-color: #f2c08b;
  background: var(--terminal);
  font: 500 .81rem/1.58 var(--mono);
  tab-size: 2;
}
.preview { padding: 0; background: white; }
.workbench-actions, .editor-actions, .lesson-actions, .diagnostic-actions, .modal-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
}
.check-list { list-style: none; padding: 0; }
.check-list li + li { margin-top: .25rem; }
.check-list li { font-size: .85rem; }
.check-list .pass, .check-list [data-result="pass"] { color: #246042; }
.check-list .fail, .check-list [data-result="fail"] { color: #92351c; }
.feedback {
  padding: .7rem .8rem;
  border: 1px solid #cdd9cb;
  border-radius: .45rem;
  color: var(--green);
  background: #ecf1e8;
  font-size: .86rem;
}
.feedback:empty { display: none; }
.feedback.error, .feedback[data-result="fail"] { color: #873218; background: #fbede3; border-color: #edd6c6; }
.question-options { display: grid; gap: .42rem; padding: 0; }
.question-options > label, .question-options > button, .option-button {
  width: 100%;
  display: flex;
  align-items: baseline;
  gap: .45rem;
  padding: .63rem .72rem;
  border: 1px solid var(--line);
  border-radius: .45rem;
  text-align: left;
  color: var(--ink);
  background: var(--page);
  font-size: .88rem;
}
.question-options > :is(label, button):hover, .option-button:hover { background: var(--green-pale); border-color: #a8bca9; }
.question-options > [aria-pressed="true"], .question-options > label:has(input:checked) { background: var(--green-pale); border-color: var(--green); }
.question-options input { accent-color: var(--green); }
.lesson-list { display: grid; gap: .42rem; padding: 0; list-style: none; }
.lesson-row {
  min-width: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .65rem;
  padding: .66rem .75rem;
  border: 1px solid var(--line);
  border-radius: .45rem;
  color: var(--ink);
  background: var(--page);
  text-align: left;
}
button.lesson-row:hover { border-color: #a6b8a6; background: var(--green-pale); }
.lesson-row small { color: var(--muted); font-size: .74rem; }
.lesson-nav { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem; }
fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
legend { padding: 0; margin-bottom: .55rem; font-weight: 750; }

@media (max-width: 53rem) {
  .shell { width: min(var(--shell), calc(100% - 3rem)); }
  .hero-grid { gap: 2rem; }
  .section-grid, .route-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 40rem) {
  .shell { width: calc(100% - 2rem); }
  .header-inner { min-height: 3.85rem; gap: .6rem; flex-wrap: wrap; padding-block: .4rem; }
  .nav-links { display: none; }
  .header-action { min-inline-size: 0; max-inline-size: 100%; }
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 2rem; padding-block: 2.7rem 2.15rem; }
  .hero::before { mask-image: linear-gradient(155deg, transparent 25%, #000 100%); }
  .hero h1 { font-size: clamp(2.9rem, 10.3vw, 4.2rem); }
  .code-preview { font-size: clamp(.7rem, 2.6vw, .83rem); }
  .window-bar { flex-wrap: wrap; overflow-wrap: anywhere; }
  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat { min-height: 4.4rem; overflow-wrap: anywhere; }
  .stat:nth-child(2) { border-inline-end: 1px solid var(--line); }
  .stat:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .method-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-inner { flex-wrap: wrap; }
  .lesson-layout { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 29rem) {
  .section-grid, .route-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-actions { gap: .45rem; }
  .hero-actions .button { min-height: 2.8rem; padding-inline: .68rem; font-size: .8rem; }
  .modal { width: calc(100vw - 1rem); max-height: calc(100dvh - 1rem); }
  .modal.lesson-modal { width: calc(100vw - 1rem); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}

/* Caracol Dev identity on the Oficina module. */
.brand-logo { display: block; background: none; }
.brand-copy small { display: block; margin-top: .2rem; }
.footer-links { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; }
@media (max-width: 36rem) {
  .footer-links { width: 100%; }
}