:root {
  --primary: #337ab7;
  --primary-dark: #286090;
  --primary-soft: #eaf4fb;
  --warning: #f0ad4e;
  --bg-light: linear-gradient(135deg, #1f4e73 0%, #286090 48%, #337ab7 100%);
  --bg-accent: linear-gradient(180deg, #ffffff 0%, #f4f9fc 100%);
  --item-bg: #fff;
  --item-hover: #eaf4fb;
  --link: #286090;
  --shadow: 0 20px 54px rgba(25, 65, 95, .18);
  --radius-lg: 20px;
  --text-soft: #eaf4fb;
  --card-border: rgba(40, 96, 144, .16);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.5;
  color: #333;
  background:
    radial-gradient(circle at top right, rgba(51, 122, 183, .15), transparent 28%),
    radial-gradient(circle at left center, rgba(40, 96, 144, .08), transparent 32%),
    linear-gradient(180deg, #f8fbfd 0%, #eef5f9 100%);
}

/* Layout */
.container#contenedor {
  max-width: 1100px;
  margin: 2rem auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.row { display: flex; flex-wrap: wrap; }
.row > .col { flex: 1 1 100%; padding: 1rem; }
.row.align-right { justify-content: flex-end; }

#fila1 { background: var(--bg-light); }
#fila2 { background: var(--bg-accent); }
#fila3 { background: var(--bg-accent); }

/* Header */
.eyebrow {
  display: inline-block;
  margin: 0 0 .75rem 0;
  padding: .35rem .8rem;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 999px;
  color: var(--text-soft);
  background: rgba(255,255,255,.08);
  font-size: .95rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}
h1.title {
  font-size: clamp(2rem, 6vw, 4em);
  margin: 0 0 .25em 0;
  color: #fff;
  text-shadow: 0 6px 16px rgba(0,0,0,.35);
}
.hero-text {
  max-width: 850px;
  margin: 0;
  color: var(--text-soft);
  font-size: clamp(1rem, 2vw, 1.2rem);
}
.back-link {
  display: inline-block;
  margin-bottom: 1rem;
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}
.back-link:hover { color: #d9edf7; text-decoration: underline; }
.header-actions { text-align: right; }
.header-actions a { display: inline-block; margin: .5rem 1rem .5rem 0; }

.btn {
  display: inline-block;
  padding: .5rem 1rem;
  border-radius: .375rem;
  text-decoration: none;
  font-weight: 600;
  transition: filter .15s ease-in-out;
}
.btn:hover { filter: brightness(0.95); }
.btn-success { background: #198754; color: #fff; }

.course-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.highlight-card {
  padding: 1rem 1.1rem;
  border-radius: 14px;
  background: rgba(255,255,255,.72);
  border: 1px solid rgba(40, 96, 144, .14);
  box-shadow: 0 10px 26px rgba(40, 96, 144, .10);
}

.highlight-label {
  display: block;
  margin-bottom: .35rem;
  color: #5c7f99;
  font-size: .92rem;
  text-transform: uppercase;
  letter-spacing: .03em;
}

.highlight-card strong {
  color: #244b68;
  font-size: 1.05rem;
}

.course-introduction p { margin-bottom: .8rem; font-size: 1.12rem; line-height: 1.7; }
/* Menu list */
.list-group { box-shadow: 0 10px 28px rgba(11, 33, 55, .14); border-radius: .9rem; overflow: hidden; border: 1px solid var(--card-border); }
.list-group#menu { font-size: 1.5em; }
.list-group-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.05rem 1rem;
  background: var(--item-bg);
  color: var(--link);
  text-decoration: none;
  border-top: 1px solid #dce8f0;
  transition: background-color .2s ease, transform .2s ease, padding-left .2s ease;
}
.list-group-item:first-child { border-top: 0; }
.list-group-item:hover {
  background: var(--item-hover);
  transform: translateX(4px);
  padding-left: 1.2rem;
}

.list-group-item.is-active {
  background: linear-gradient(90deg, #d9edf7 0%, #eef7fc 100%);
  box-shadow: inset 4px 0 0 var(--primary);
}

.topic-number {
  flex: 0 0 2.55rem;
  color: #6f8fa6;
  font-size: .72em;
  font-weight: 700;
  letter-spacing: .04em;
}

.course-footer {
  padding: 1.4rem 1rem;
  background: #222;
  color: #ccc;
  text-align: center;
}
.course-footer p { margin: 0 0 .35rem; }
.course-footer a { color: #9dcef0; }


.text-center { text-align: center; }
.pagination { list-style: none; padding: 0; margin: 1rem 0; }
.pagination li { display: inline-block; margin: 0 .25rem; }
.pagination a { display: inline-block; padding: .5rem .75rem; background: #fff; border: 1px solid #ddd; border-radius: .25rem; text-decoration: none; color: inherit; }
.pagination .active a { background: #e9ecef; }

@media (min-width: 768px) {
  .row > .col { flex: 1 1 50%; }
  #fila1 > .col:first-child { flex: 1 1 70%; }
  #fila1 > .col:last-child { flex: 1 1 30%; }
  #fila2 .col, #fila3 .col { flex-basis: 100%; }
}

@media (min-width: 768px) {
  body.tema-page .row > .col {
    flex: 0 0 100%;
    max-width: 100%;
  }
}

body.tema-page {
  background: #eef5f9;
}
.tema-page .container#contenedor { padding: 1rem; }
.titulodetalle {
  background: linear-gradient(135deg, #1f4e73 0%, #286090 48%, #337ab7 100%);
  border-radius: 18px;
  box-shadow: 0 20px 46px rgba(25, 65, 95, .22);
  padding: 1.25rem 1.4rem;
  margin: 1rem 0 2rem 0;
}
.titulodetalle h1 {
  margin: 0;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  color: #fff;
  text-shadow: 0 6px 16px rgba(0,0,0,.35);
}
.tema-page .titulodetalle .eyebrow { margin-bottom: .6rem; }
.tema-page .titulodetalle .hero-text {
  margin-top: .75rem;
  max-width: 900px;
}
.cuerpodetalle {
  background: linear-gradient(180deg, rgba(255,255,255,.98) 0%, rgba(244, 249, 252, .98) 100%);
  border: 1px solid #d5e4ee;
  border-radius: 18px;
  padding: 1.25rem 1.4rem;
  box-shadow: 0 18px 40px rgba(25, 65, 95, .10);
  margin-bottom: 2rem;
  font-size: 1.05rem;
}
.cuerpodetalle p {
  margin: 0 0 1em 0;
  text-align: justify;
  text-justify: inter-word;
  color: #344b5c;
  font-weight: 400;
}
.cuerpodetalle h2 {
  margin: 1.6rem 0 .6rem;
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  color: var(--primary-dark);
}
.cuerpodetalle section:first-of-type h2 { margin-top: 0; }
.cuerpodetalle ul { padding-left: 1.25rem; margin: 0 0 1em 0; }
.cuerpodetalle ol { padding-left: 1.25rem; margin: 0 0 1em 0; }
.cuerpodetalle li { color: #344b5c; font-weight: 400; }
.cuerpodetalle a { color: var(--primary-dark); }
.tema-page .table {
  --bs-table-striped-bg: rgba(217, 237, 247, .56);
}
.tema-page .table thead th {
  background: #d9edf7;
  color: #244b68;
}
.recuadro {
  background: linear-gradient(180deg, #f7fbfe 0%, #eaf4fb 100%);
  text-align:left;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size:1rem;
  padding:.75rem 1rem;
  border: 1px solid #bcd6e8;
  border-left: 4px solid var(--primary);
  border-radius: 6px;
  color: #244b68;
  box-shadow: 0 8px 20px rgba(40, 96, 144, .08);
  overflow-x:auto;
  margin: .75rem 0 1.25rem 0;
  position: relative;
}

.recuadro-codigo:hover .copy-btn,
.recuadro-codigo:focus-within .copy-btn {
  opacity: 1;
  transform: translateY(0);
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 12px;
  font-size: .85rem;
  color: #0d6efd;
  background: rgba(255,255,255,.95);
  border: 1px solid #0d6efd;
  border-radius: 999px;
  padding: .15rem .65rem;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity .2s ease, transform .2s ease;
  box-shadow: 0 2px 6px rgba(0,0,0,.15);
  cursor: pointer;
}

.copy-btn:hover,
.copy-btn:focus {
  opacity: 1;
  transform: translateY(-1px);
  outline: none;
}

.recuadrooculto { display: none; }
.botonretorno { font-size: 1.1rem; margin-top: 1rem; }
.botonretorno a {
  display: inline-block;
  padding: .7rem 1.2rem;
  background: linear-gradient(135deg, #286090 0%, #337ab7 100%);
  border: 0;
  border-radius: 999px;
  text-decoration: none;
  color: #fff;
  box-shadow: 0 12px 28px rgba(40, 96, 144, .24);
}
.botonretorno a:hover { filter: none; transform: translateY(-1px); }
.botonretorno a.boton-online {
  padding: .85rem 1.4rem;
  background: linear-gradient(135deg, #0f766e 0%, #14b8a6 52%, #67e8f9 100%);
  border: 0;
  border-radius: 999px;
  transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
}
.botonretorno a.boton-online:hover {
  filter: none;
  transform: translateY(-2px);
  box-shadow: 0 18px 34px rgba(15, 118, 110, .35);
}
.botonretorno a.boton-online:active {
  transform: translateY(0);
  box-shadow: 0 10px 20px rgba(15, 118, 110, .24);
}
ul li { margin-bottom: .75rem; }

/* Responsive ad placeholders similar to tema.htm */
.uno { width: 320px; height: 100px; }
@media (min-width: 500px) { .uno { width: 320px; height: 100px; } }
@media (min-width: 800px) { .uno { width: 336px; height: 280px; } }

.dos { width: 320px; height: 100px; }
@media (min-width: 500px) { .dos { width: 320px; height: 100px;} }
@media (min-width: 800px) { .dos { width: 336px; height: 280px; } }

/* Media elements */
.cuerpodetalle img, .cuerpodetalle video { max-width: 100%; height: auto; border-radius: 4px; box-shadow: 0 0 6px #aaa; }
.modal { position: fixed; inset: 0; display: none; z-index: 1000; }
.modal.open { display: block; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.45); }
.modal-dialog { position: relative; max-width: 900px; width: calc(100% - 2rem); margin: 5vh auto; background: #fff; border-radius: 8px; box-shadow: 0 20px 50px rgba(0,0,0,.25); overflow: hidden; }
.modal-header, .modal-footer { padding: .75rem 1rem; background: #f6f6f6; }
.modal-header { display: flex; align-items: center; justify-content: space-between; }
.modal-body { padding: 1rem; max-height: 70vh; overflow: auto; }
.modal-close { border: 0; background: transparent; font-size: 1.5rem; line-height: 1; cursor: pointer; }
.modal .recuadro { margin: 0; }
.cuerpodetalle .screenshot { display:block; margin:.5rem auto 1rem; }
.cuerpodetalle code {
  background: #fff9c4;
  border-radius: .25rem;
  padding: .1em .3em;
}

.cuerpodetalle pre {
  margin: .75rem 0 1.25rem 0;
  padding: 1rem;
  overflow-x: auto;
  background: #fff3a3;
  border: 2px solid #d6a800;
  border-radius: 0;
  color: #332900;
  box-shadow: none;
}

.cuerpodetalle pre code,
.cuerpodetalle pre code.hljs {
  display: block;
  padding: 0;
  background: transparent;
  border-radius: 0;
  color: inherit;
}

.recuadro pre { margin: 0; }
.recuadro pre code.hljs { padding: 0; background: transparent; }

@media (max-width: 767px) {
  .container#contenedor { width: calc(100% - 2rem); margin: 1rem; }
  .list-group#menu { font-size: 1.1rem; }
  .course-highlights { grid-template-columns: 1fr 1fr; }
  .list-group-item:hover {
    transform: none;
    padding-left: 1rem;
  }
}
 
/* Tutorial del tutor datilografico. Scoped para conservar las paginas de temas. */
.tutorial-page {
  --paper: #f6f5ef;
  --ink: #19392f;
  --muted: #626d65;
  --line: #dcded3;
  --green: #215841;
  --lime: #d8ed95;
  background: var(--paper);
  color: var(--ink);
  font-family: "Segoe UI", Arial, sans-serif;
  line-height: 1.65;
  height: auto;
}
.tutorial-page [hidden] { display: none !important; }
.tutorial-page * { box-sizing: border-box; }
.tutorial-page a { color: inherit; }
.tutorial-page button { font: inherit; cursor: pointer; }
.tutorial-page :is(a, button, summary, pre):focus-visible { outline: 3px solid #628e35; outline-offset: 5px; }
.tutorial-page :is(section, article, #recorrido) { scroll-margin-top: 30px; }
.tutorial-page p { margin: 0 0 1.2rem; }
.tutorial-page h1, .tutorial-page h2, .tutorial-page h3, .tutorial-page h4 { line-height: 1.16; }
.tutorial-page h2 { font-size: clamp(1.8rem, 3.5vw, 2.65rem); font-weight: 600; letter-spacing: -.045em; margin: 0 0 1.2rem; }
.tutorial-page h3 { font-size: clamp(1.3rem, 2.3vw, 1.75rem); font-weight: 600; letter-spacing: -.025em; margin: 0; }
.tutorial-page h4 { font-size: 1.04rem; margin: 1.6rem 0 .7rem; }
.tutorial-page code { font-family: Consolas, "Courier New", monospace; font-size: .88em; overflow-wrap: anywhere; }
.tutorial-page .kicker { font: 600 .67rem/1.5 Consolas, "Courier New", monospace; letter-spacing: .12em; margin: 0 0 .8rem; color: var(--green); }
.tutorial-page .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.tutorial-page .skip-link { position: fixed; top: -100px; left: 20px; z-index: 30; padding: 12px 20px; background: var(--ink); color: white; }
.tutorial-page .skip-link:focus { top: 12px; }
.tutorial-page .site-header { max-width: 1300px; margin: auto; padding: 24px 48px; display: flex; justify-content: space-between; align-items: center; gap: 24px; border-bottom: 1px solid var(--line); }
.tutorial-page .site-brand { text-decoration: none; display: inline-flex; align-items: center; gap: 12px; font-size: .8rem; font-weight: 650; line-height: 1.3; }
.tutorial-page .brand-symbol { font: 700 1.25rem/1 Consolas, monospace; letter-spacing: -.08em; background: var(--ink); color: var(--paper); padding: 13px 9px; border-radius: 5px; }
.tutorial-page .brand-second { display: block; font-weight: 400; color: var(--muted); }
.tutorial-page .header-nav { display: flex; align-items: center; gap: 30px; font-size: .78rem; }
.tutorial-page .header-nav a { text-decoration: none; }
.tutorial-page .header-nav a:hover { text-decoration: underline; text-underline-offset: 5px; }
.tutorial-page .header-demo { border: 1px solid #abb7a9; padding: 10px 15px; border-radius: 5px; }
.tutorial-page .header-demo span:first-child { margin-left: 15px; }
.tutorial-page .hero { max-width: 1300px; margin: auto; padding: 68px 48px 64px; display: grid; grid-template-columns: 1.03fr 1fr; gap: 52px; align-items: center; }
.tutorial-page .hero .kicker { display: flex; gap: 9px; align-items: center; margin-bottom: 22px; }
.tutorial-page .status-dot { display: inline-block; flex-shrink: 0; width: 7px; height: 7px; border-radius: 50%; background: #65853b; }
.tutorial-page h1 { font-size: clamp(2.8rem, 5.1vw, 4.3rem); font-weight: 550; letter-spacing: -.065em; margin: 0 0 24px; line-height: 1.03; }
.tutorial-page h1 em { font-family: Georgia, "Times New Roman", serif; font-weight: 400; color: #54703e; letter-spacing: -.055em; }
.tutorial-page .hero-intro { max-width: 470px; color: var(--muted); font-size: .97rem; line-height: 1.85; }
.tutorial-page .hero-actions { display: flex; flex-wrap: wrap; gap: 21px; align-items: center; margin: 29px 0; }
.tutorial-page .primary-action { display: inline-flex; gap: 24px; padding: 14px 20px; border-radius: 5px; background: var(--green); color: white; text-decoration: none; font-size: .8rem; font-weight: 600; transition: background .2s; }
.tutorial-page .primary-action:hover { background: #163c2c; }
.tutorial-page .text-action { font-size: .77rem; text-underline-offset: 5px; }
.tutorial-page .author-line { display: flex; gap: 10px; align-items: center; color: var(--muted); font-size: .69rem; margin: 0; flex-wrap: wrap; }
.tutorial-page .author-avatar { display: grid; place-items: center; width: 30px; height: 30px; border: 1px solid #bdc8af; background: #e5eadb; border-radius: 50%; font-size: .58rem; color: var(--green); font-weight: 700; }
.tutorial-page .author-divider { color: #b6bdac; }
.tutorial-page .hero-art { position: relative; margin: 0; background: #e6e9dc; border: 1px solid #dce0cf; border-radius: 9px; min-width: 0; padding: 23px 26px; align-self: stretch; display: flex; flex-direction: column; justify-content: space-between; overflow: hidden; background-image: radial-gradient(#b8c4ac 1px, transparent 1px); background-size: 15px 15px; }
.tutorial-page .hero-art::before { content: ""; position: absolute; width: 350px; height: 350px; border: 1px solid #d1d8c2; border-radius: 50%; top: 18%; left: 16%; box-shadow: 0 0 0 38px #e1e5d670, 0 0 0 39px #d8decd; pointer-events: none; }
.tutorial-page .art-label { position: relative; display: flex; justify-content: space-between; color: #627054; font: .61rem Consolas, monospace; letter-spacing: .12em; gap: 12px; }
.tutorial-page .retro-machine { position: relative; width: 100%; max-width: 385px; margin: 48px auto 23px; transform: rotate(-3deg); }
.tutorial-page .mini-monitor { background: linear-gradient(135deg, #e0dec7, #b7b69e); padding: 16px 20px 12px; border-radius: 12px; border: 1px solid #969780; box-shadow: inset 2px 2px 1px #f5f3dd, inset -5px -6px 1px #9d9e86, 12px 17px 25px #25342124; }
.tutorial-page .monitor-label { display: flex; justify-content: space-between; color: #595e4d; font: .45rem Consolas, monospace; margin: 0 0 12px; letter-spacing: .08em; gap: 10px; }
.tutorial-page .mini-screen { background: #0c231a; color: #a9ef88; border: 9px solid #373e31; border-radius: 17px; padding: 15px 16px 12px; box-shadow: inset 0 0 40px #010c09, 0 1px 0 #f3eed3; background-image: repeating-linear-gradient(transparent 0 2px, #00000019 2px 4px); }
.tutorial-page .screen-toolbar, .tutorial-page .screen-footer { display: flex; justify-content: space-between; font: .5rem Consolas, monospace; gap: 8px; }
.tutorial-page .screen-toolbar { padding-bottom: 10px; border-bottom: 1px solid #476940; color: #88b672; }
.tutorial-page .mini-screen pre { font: clamp(.59rem, 1.05vw, .85rem)/1.7 Consolas, "Courier New", monospace; margin: 14px 0; text-shadow: 0 0 6px #94e96b70; }
.tutorial-page .screen-muted { color: #79b068; }
.tutorial-page .screen-footer { padding-top: 9px; border-top: 1px solid #476940; }
.tutorial-page .monitor-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 14px; font: .49rem Consolas, monospace; color: #5e6250; }
.tutorial-page .power-light { background: #9bee6e; height: 5px; width: 5px; box-shadow: 0 0 6px #77a64c; border-radius: 50%; margin-right: 3px; }
.tutorial-page .monitor-neck { width: 90px; height: 26px; margin: auto; background: linear-gradient(#858b73, #bdc0a6); }
.tutorial-page .monitor-foot { width: 165px; height: 12px; margin: auto; background: #c7c8af; border: 1px solid #9fa28a; border-radius: 8px 8px 3px 3px; box-shadow: 0 5px 0 #909880; }
.tutorial-page .mini-keyboard { background: linear-gradient(135deg, #d7d5bc, #b7b99f); border: 1px solid #969d86; border-bottom: 6px solid #949b85; border-radius: 7px; padding: 11px 16px 8px; margin: 22px -5px 0; transform: perspective(600px) rotateX(22deg); box-shadow: 9px 12px 13px #25342120; }
.tutorial-page .key-row { display: flex; justify-content: center; gap: 4px; margin-bottom: 4px; }
.tutorial-page .key-row > span { background: #e9e7d8; border: 1px solid #a4a892; border-bottom: 3px solid #a4a892; border-radius: 3px; flex: 1; max-width: 29px; height: 21px; text-align: center; font: .5rem/17px Consolas, monospace; color: #666e5b; }
.tutorial-page .key-row > .lit-key { background: #cee99a; color: #2d623b; }
.tutorial-page .key-row > .space-key { max-width: 155px; height: 17px; }
.tutorial-page .hero-art figcaption { font: .61rem/1.5 Consolas, monospace; color: #5d6d52; position: relative; text-align: center; margin-top: 18px; }
.tutorial-page .hero-art figcaption .status-dot { width: 5px; height: 5px; margin-right: 5px; }
.tutorial-page .course-strip { max-width: 1204px; margin: 0 auto; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); display: grid; grid-template-columns: repeat(3, 1fr) 1.3fr; padding: 28px 0; }
.tutorial-page .course-strip > div { padding: 0 26px; border-right: 1px solid var(--line); display: flex; align-items: center; gap: 13px; }
.tutorial-page .course-strip > div:first-child { padding-left: 0; }
.tutorial-page .course-strip > div:last-child { border: 0; }
.tutorial-page .course-strip strong { font: 400 2.1rem Georgia, serif; }
.tutorial-page .course-strip span { color: var(--muted); font-size: .73rem; max-width: 115px; line-height: 1.5; }
.tutorial-page .course-strip .stack { gap: 18px; }
.tutorial-page .stack > span { font: .57rem/1.4 Consolas, monospace; letter-spacing: .1em; }
.tutorial-page .stack p { font: .68rem/1.8 Consolas, monospace; margin: 0; }
.tutorial-page .course-layout { max-width: 1300px; margin: auto; padding: 74px 48px 86px; display: grid; grid-template-columns: 245px minmax(0, 1fr); gap: 70px; align-items: start; }
.tutorial-page .course-sidebar { position: sticky; top: 25px; }
.tutorial-page .course-content { min-width: 0; }
.tutorial-page .course-sidebar h2 { font-size: 1.7rem; margin-bottom: 22px; }
.tutorial-page .course-nav { border-top: 1px solid var(--line); padding: 12px 0; }
.tutorial-page .course-nav a { text-decoration: none; display: grid; grid-template-columns: 22px 1fr; gap: 12px; padding: 9px 8px; margin-left: -8px; font-size: .73rem; color: var(--muted); line-height: 1.5; border-left: 2px solid transparent; }
.tutorial-page .course-nav a span { font: .65rem/1.7 Consolas, monospace; color: #7c886b; }
.tutorial-page .course-nav a:hover, .tutorial-page .course-nav a[aria-current="location"] { color: var(--green); background: #e8ecdE; border-left-color: #739649; }
.tutorial-page .sidebar-note { border-top: 1px solid var(--line); padding-top: 20px; margin-top: 8px; display: flex; gap: 14px; }
.tutorial-page .sidebar-note > span { font-size: 1.8rem; color: #789349; }
.tutorial-page .sidebar-note p { font-size: .72rem; color: var(--muted); margin: 0; }
.tutorial-page .back-top { font-size: .67rem; display: inline-block; margin-top: 18px; text-underline-offset: 4px; }
.tutorial-page .section-intro { margin-bottom: 35px; }
.tutorial-page .section-intro > p:not(.kicker):not(.plan-note) { font-size: .92rem; color: var(--muted); max-width: 690px; }
.tutorial-page .plan-note { font-size: .7rem; color: #677655; display: flex; align-items: center; gap: 8px; }
.tutorial-page .lesson { background: #fdfdf8; border: 1px solid var(--line); border-radius: 8px; margin-bottom: 20px; padding: 29px 30px; }
.tutorial-page .lesson-heading { display: flex; align-items: flex-start; gap: 18px; margin-bottom: 21px; }
.tutorial-page .lesson-heading .kicker { font-size: .59rem; margin: 0 0 7px; }
.tutorial-page .lesson-number { display: grid; place-items: center; flex: 0 0 40px; height: 40px; border: 1px solid #d7dfc7; background: #edf1e4; color: #698242; font: .95rem Consolas, monospace; border-radius: 5px; }
.tutorial-page .lesson p { font-size: .86rem; color: #59665d; }
.tutorial-page .objective-quote { font: 400 clamp(1.16rem, 2vw, 1.4rem)/1.55 Georgia, serif; margin: 25px 0; color: var(--green); border-left: 3px solid #9eb669; padding-left: 22px; }
.tutorial-page .objective-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding: 20px 0 10px; border-top: 1px solid var(--line); }
.tutorial-page .objective-grid span { font: .59rem Consolas, monospace; letter-spacing: .08em; color: #6d794f; }
.tutorial-page .objective-grid p { margin-top: 10px; font-size: .79rem; }
.tutorial-page .concepts { font-size: .77rem !important; margin: 16px 0 20px; line-height: 1.85; }
.tutorial-page .concepts > strong { display: block; color: var(--ink); font-size: .75rem; margin-bottom: 5px; }
.tutorial-page .demo-banner { text-decoration: none; display: flex; align-items: center; justify-content: space-between; background: var(--ink); color: #f3f5e9; border-radius: 5px; padding: 20px; gap: 12px; margin-top: 26px; }
.tutorial-page .demo-banner .kicker { display: block; font-size: .55rem; color: #b8cc8f; margin-bottom: 7px; }
.tutorial-page .demo-banner strong { display: block; font-size: 1.03rem; font-weight: 500; }
.tutorial-page .demo-banner small { display: block; color: #c3cdbb; font-size: .64rem; margin-top: 5px; overflow-wrap: anywhere; }
.tutorial-page .demo-banner > span:nth-child(2) { font-size: 1.8rem; color: #c6e69c; }
.tutorial-page .demo-banner:hover { background: #24523f; }
.tutorial-page summary { cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 14px; font-size: .79rem; font-weight: 600; }
.tutorial-page summary::-webkit-details-marker { display: none; }
.tutorial-page summary > span:last-child { font-size: 1.2rem; transition: transform .2s; }
.tutorial-page details[open] > summary > span:last-child { transform: rotate(45deg); }
.tutorial-page .prompt-details { border: 1px solid #d6ddca; border-radius: 5px; overflow: hidden; margin: 25px 0; }
.tutorial-page .prompt-details summary { background: #eaf0df; padding: 15px 18px; }
.tutorial-page .prompt-icon { font: 1rem Consolas, monospace; margin-right: 8px; color: #6c853f; }
.tutorial-page .prompt-body { background: #14281f; color: #dcebc9; }
.tutorial-page .code-header { background: #22382b; padding: 12px 16px; display: flex; justify-content: space-between; gap: 14px; align-items: center; color: #bbccab; font: .62rem/1.5 Consolas, monospace; overflow-wrap: anywhere; }
.tutorial-page .small-button { border: 1px solid #abb897; border-radius: 4px; padding: 8px 12px; background: transparent; color: var(--green); font-size: .67rem; white-space: nowrap; }
.tutorial-page .small-button:hover { background: #e5edda; }
.tutorial-page .code-header .small-button { color: #d7e4c7; border-color: #688057; font: .65rem "Segoe UI", sans-serif; padding: 6px 10px; }
.tutorial-page .code-header .small-button:hover { background: #3a5035; }
.tutorial-page .original-prompt { margin: 0; padding: 22px; max-height: 640px; overflow: auto; white-space: pre-wrap; overflow-wrap: anywhere; font: .78rem/1.85 Consolas, "Courier New", monospace; }
.tutorial-page .requirement-note { background: #f3f0e2; border-left: 3px solid #b69b50; padding: 23px; border-radius: 0 5px 5px 0; }
.tutorial-page .requirement-note .kicker { color: #857137; font-size: .59rem; }
.tutorial-page .requirement-note h4 { margin-top: 0; font-size: 1.05rem; }
.tutorial-page .requirement-note p { font-size: .78rem; }
.tutorial-page .requirement-note p:last-child { margin-bottom: 0; }
.tutorial-page .time-phases { list-style: none; padding: 0; display: grid; grid-template-columns: 60fr 20fr 55fr; gap: 5px; margin: 18px 0; }
.tutorial-page .time-phases li { background: #dce7c6; padding: 10px 12px; border-bottom: 3px solid #89a760; line-height: 1.4; }
.tutorial-page .time-phases li:nth-child(2) { background: #ece0b9; border-color: #b79d52; }
.tutorial-page .time-phases li:nth-child(3) { background: #e0e3d3; border-color: #9ca687; }
.tutorial-page .time-phases strong, .tutorial-page .time-phases span { display: block; }
.tutorial-page .time-phases strong { font: 1.15rem Georgia, serif; }
.tutorial-page .time-phases span { font-size: .66rem; margin-top: 5px; }
.tutorial-page .editorial-note { font-size: .74rem !important; color: #6c7565 !important; padding: 12px 15px; border-left: 2px solid #b7c49f; background: #f0f3e9; }
.tutorial-page .stage-roadmap { list-style: none; padding: 0; margin: 25px 0; }
.tutorial-page .stage-roadmap li { margin: 0; border-bottom: 1px solid var(--line); }
.tutorial-page .stage-roadmap a { display: grid; grid-template-columns: 25px 1fr auto; align-items: center; gap: 12px; padding: 12px 4px; text-decoration: none; font-size: .78rem; }
.tutorial-page .stage-roadmap a:hover { background: #eef2e6; }
.tutorial-page .stage-roadmap span { font: .68rem Consolas, monospace; color: #7d8d68; }
.tutorial-page .stage-roadmap strong { font-weight: 500; }
.tutorial-page .stage-roadmap small { font: .6rem Consolas, monospace; color: #6c7b5b; }
.tutorial-page .iteration-loop { background: #e9efde; padding: 17px 20px; border-radius: 4px; margin: 25px 0; }
.tutorial-page .iteration-loop .kicker { font-size: .56rem; }
.tutorial-page .iteration-loop p:last-child { margin: 0; color: var(--green); font-size: .76rem; font-weight: 600; line-height: 2.2; }
.tutorial-page .iteration-loop span { padding: 0 8px; color: #7b8f60; }
.tutorial-page .stages-heading { margin: 53px 0 8px; display: flex; gap: 20px; align-items: center; justify-content: space-between; }
.tutorial-page .stages-heading h2 { font-size: 2rem; margin-bottom: 10px; }
.tutorial-page .stages-description { color: var(--muted); font-size: .86rem; margin-bottom: 28px; }
.tutorial-page .stage { padding-bottom: 0; }
.tutorial-page .stage .lesson-heading { margin-bottom: 15px; }
.tutorial-page .stage h3 { font-size: 1.34rem; }
.tutorial-page .lesson-description { font-size: .86rem; }
.tutorial-page .lesson-outcome { display: flex; gap: 14px; border-top: 1px solid var(--line); padding-top: 16px; margin-top: 20px; }
.tutorial-page .lesson-outcome > span { color: #799e4a; font-size: 1.5rem; }
.tutorial-page .lesson-outcome p { font-size: .8rem; margin-bottom: 17px; }
.tutorial-page .lesson-outcome strong { display: block; font-size: .72rem; color: var(--green); margin-bottom: 5px; }
.tutorial-page .lesson-details > summary { padding: 14px 0; border-top: 1px solid var(--line); color: var(--green); font-size: .72rem; }
.tutorial-page .detail-content { padding-bottom: 24px; }
.tutorial-page .detail-content blockquote { margin: 0 0 22px; background: #eef2e6; padding: 17px 20px; border-left: 2px solid #89a761; color: #4e6449; font-size: .83rem; }
.tutorial-page .file-list { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 22px; }
.tutorial-page .file-list li { padding: 4px 8px; background: #eeeee4; border: 1px solid #e0e3d2; border-radius: 3px; font-size: .75rem; margin: 0; max-width: 100%; }
.tutorial-page .source-code { background: #14281f; color: #cfe4b9; padding: 20px; margin: 0 0 14px; max-height: 450px; overflow: auto; font: .73rem/1.75 Consolas, monospace; tab-size: 4; }
.tutorial-page .source-code code { font: inherit; overflow-wrap: normal; }
.tutorial-page .source-note { font-size: .77rem !important; line-height: 1.8; }
.tutorial-page .detail-content .editorial-note { margin-bottom: 0; }
.tutorial-page .closing-note { padding: 38px; margin-top: 38px; border: 1px solid #cfdbb7; border-radius: 8px; background: #e9efdc; }
.tutorial-page .closing-note h2 { font-size: 2rem; }
.tutorial-page .closing-note p { font-size: .85rem; color: #586a4c; }
.tutorial-page .closing-note a { font-size: .78rem; font-weight: 600; text-underline-offset: 5px; }
.tutorial-page .tutorial-footer { border-top: 1px solid var(--line); max-width: 1300px; margin: auto; padding: 28px 48px; display: flex; justify-content: space-between; align-items: center; gap: 22px; }
.tutorial-page .tutorial-footer p, .tutorial-page .tutorial-footer > a:last-child { font-size: .65rem; color: var(--muted); margin: 0; }
.tutorial-page .tutorial-footer .brand-symbol { font-size: .9rem; padding: 10px 8px; }
.tutorial-page .tutorial-footer .site-brand { font-size: .66rem; }
@media (min-width: 1500px) {
  .tutorial-page .hero { padding-top: 80px; padding-bottom: 80px; }
}
@media (max-width: 1100px) {
  .tutorial-page .site-header, .tutorial-page .hero, .tutorial-page .course-layout, .tutorial-page .tutorial-footer { padding-left: 28px; padding-right: 28px; }
  .tutorial-page .hero { gap: 30px; }
  .tutorial-page .hero-art { padding: 22px 18px; }
  .tutorial-page .course-strip { margin-left: 28px; margin-right: 28px; }
  .tutorial-page .course-strip > div { padding: 0 18px; }
  .tutorial-page .course-layout { grid-template-columns: 205px minmax(0, 1fr); gap: 32px; }
  .tutorial-page .lesson { padding: 24px; }
  .tutorial-page .stage { padding-bottom: 0; }
  .tutorial-page .stages-heading { flex-direction: column; align-items: flex-start; margin-bottom: 18px; }
}
@media (max-width: 800px) {
  .tutorial-page .hero { padding-top: 42px; grid-template-columns: 1fr; gap: 32px; }
  .tutorial-page h1 { font-size: clamp(3.3rem, 8vw, 4.3rem); }
  .tutorial-page .hero-intro { max-width: 570px; }
  .tutorial-page .hero-art { min-height: 500px; }
  .tutorial-page .mini-screen pre { font-size: .82rem; }
  .tutorial-page .retro-machine { margin-top: 35px; }
  .tutorial-page .hero-art::before { left: calc(50% - 175px); }
  .tutorial-page .course-strip { grid-template-columns: 1fr 1fr; gap: 22px 0; }
  .tutorial-page .course-strip > div:nth-child(2) { border: 0; }
  .tutorial-page .course-strip > div:nth-child(3) { padding-left: 0; }
  .tutorial-page .course-layout { grid-template-columns: minmax(0, 1fr); padding-top: 42px; }
  .tutorial-page .course-sidebar { position: static; }
  .tutorial-page .course-sidebar h2 br { display: none; }
  .tutorial-page .course-nav { display: grid; grid-template-columns: 1fr 1fr; column-gap: 20px; }
  .tutorial-page .sidebar-note, .tutorial-page .back-top { display: none; }
  .tutorial-page .course-sidebar h2 { font-size: 1.5rem; }
  .tutorial-page .tutorial-footer { flex-wrap: wrap; }
}
@media (max-width: 480px) {
  .tutorial-page .site-header { padding: 18px; gap: 12px; }
  .tutorial-page .header-nav { gap: 0; }
  .tutorial-page .header-nav > a:not(.header-demo) { display: none; }
  .tutorial-page .header-demo { padding: 8px 10px; font-size: .69rem; }
  .tutorial-page .header-demo span:first-child { margin-left: 4px; }
  .tutorial-page .site-brand { font-size: .7rem; gap: 8px; }
  .tutorial-page .brand-symbol { font-size: 1.05rem; padding: 12px 8px; }
  .tutorial-page .hero { padding: 35px 18px; }
  .tutorial-page h1 { font-size: 3.25rem; }
  .tutorial-page .hero-intro { font-size: .87rem; }
  .tutorial-page .hero .kicker { font-size: .6rem; }
  .tutorial-page .hero-art { min-height: auto; padding: 18px 12px; }
  .tutorial-page .mini-monitor { padding: 13px 12px 10px; }
  .tutorial-page .mini-screen { padding: 12px 10px; border-width: 7px; }
  .tutorial-page .mini-screen pre { font-size: clamp(.6rem, 2.6vw, .8rem); }
  .tutorial-page .monitor-label { font-size: .4rem; }
  .tutorial-page .retro-machine { width: 93%; margin-top: 30px; margin-bottom: 5px; }
  .tutorial-page .mini-keyboard { padding: 8px; }
  .tutorial-page .key-row { gap: 3px; }
  .tutorial-page .hero-art figcaption { font-size: .52rem; }
  .tutorial-page .course-strip { margin: 0 18px; }
  .tutorial-page .course-strip > div { padding: 0 12px; gap: 10px; }
  .tutorial-page .course-strip strong { font-size: 1.8rem; }
  .tutorial-page .course-strip span { font-size: .63rem; }
  .tutorial-page .course-strip .stack { display: block; }
  .tutorial-page .stack p { font-size: .59rem; }
  .tutorial-page .stack > span { display: block; font-size: .52rem; margin-bottom: 5px; }
  .tutorial-page .course-layout { padding: 36px 18px; gap: 22px; }
  .tutorial-page .course-nav { column-gap: 12px; }
  .tutorial-page .course-nav a { font-size: .67rem; gap: 5px; }
  .tutorial-page .lesson { padding: 22px 18px; }
  .tutorial-page .stage { padding-bottom: 0; }
  .tutorial-page .lesson-heading { gap: 12px; }
  .tutorial-page .lesson-number { flex-basis: 32px; height: 32px; font-size: .8rem; }
  .tutorial-page .lesson-heading .kicker { font-size: .51rem; }
  .tutorial-page .stage h3 { font-size: 1.19rem; }
  .tutorial-page .objective-grid { grid-template-columns: 1fr; gap: 0; }
  .tutorial-page .objective-quote { padding-left: 15px; }
  .tutorial-page .requirement-note { padding: 18px 14px; }
  .tutorial-page .time-phases { grid-template-columns: 1fr 1fr 1fr; }
  .tutorial-page .time-phases li { padding: 10px 7px; }
  .tutorial-page .stage-roadmap a { gap: 7px; grid-template-columns: 20px 1fr; font-size: .74rem; }
  .tutorial-page .stage-roadmap small { grid-column: 2; }
  .tutorial-page .iteration-loop { padding: 15px; }
  .tutorial-page .iteration-loop span { padding: 0 3px; }
  .tutorial-page .code-header { flex-wrap: wrap; }
  .tutorial-page .source-code { padding: 14px; }
  .tutorial-page .closing-note { padding: 26px 22px; }
  .tutorial-page .closing-note h2 { font-size: 1.7rem; }
  .tutorial-page .tutorial-footer { padding: 25px 18px; flex-direction: column; align-items: flex-start; gap: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  .tutorial-page *, .tutorial-page *::before, .tutorial-page *::after { transition: none !important; scroll-behavior: auto !important; }
}
@media print {
  .tutorial-page { background: white; color: black; }
  .tutorial-page .site-header, .tutorial-page .course-sidebar, .tutorial-page .hero-art, .tutorial-page button, .tutorial-page .hero-actions, .tutorial-page .tutorial-footer { display: none !important; }
  .tutorial-page .hero, .tutorial-page .course-layout { display: block; padding: 20px 0; }
  .tutorial-page h1 { font-size: 32pt; }
  .tutorial-page .lesson { break-inside: avoid; background: white; }
  .tutorial-page .course-strip { margin: 0; }
  .tutorial-page .source-code, .tutorial-page .original-prompt { max-height: none; white-space: pre-wrap; overflow-wrap: anywhere; }
}