/* Landing de Tutor (paquete 9227). Fuentes propias en /static/fuentes (licencia OFL: Bricolage Grotesque, Instrument Sans e IBM Plex Mono); sin recursos externos ni estilos en línea (CSP). */
@font-face { font-family: "Bricolage Grotesque"; font-style: normal; font-weight: 500 800; font-display: swap; src: url("/static/fuentes/bricolage-grotesque-500-800.woff2") format("woff2"); }
@font-face { font-family: "Instrument Sans"; font-style: normal; font-weight: 400 700; font-display: swap; src: url("/static/fuentes/instrument-sans-400-700.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 400; font-display: swap; src: url("/static/fuentes/ibm-plex-mono-400.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 500; font-display: swap; src: url("/static/fuentes/ibm-plex-mono-500.woff2") format("woff2"); }
/* Concepto: cuaderno de estudio. Papel cuadriculado verde-gris, tinta verde oscura y un marcatextos amarillo que subraya lo que importa.
   Composición asimétrica, alineada a la izquierda, con un margen de cuaderno; la demo de conversación a la derecha del hero. */
:root {
  --paper: #f2f5f1;
  --paper-2: #e7eee8;
  --card: #fbfcfa;
  --ink: #13201b;
  --ink-2: #485952;
  --line: #c9d6cd;
  --grid: rgba(19, 32, 27, .055);
  --margin: #d7a79e;
  --green: #0b6b53;
  --on-green: #ffffff;
  --green-soft: #d6eadf;
  --mark: #f4d83b;
  --on-mark: #13201b;
  --pend-bg: #fff1c2;
  --pend-fg: #6b4e00;
  --bad: #a3361f;
  --bubble-me: #0b6b53;
  --bubble-me-fg: #ffffff;
  --bubble-bot: #e7eee8;
  --phone: #13201b;
  --inv-bg: #0f1c17;
  --inv-fg: #eef5f1;
  --inv-mark: #f4d83b;
  --font-display: "Bricolage Grotesque", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --font-body: "Instrument Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0d1512; --paper-2: #14201b; --card: #111c17; --ink: #e7f0eb; --ink-2: #9fb2a9; --line: #26362f;
    --grid: rgba(231, 240, 235, .05); --margin: #5a3b37; --green: #5fd3a8; --on-green: #07140f; --green-soft: #16322a;
    --mark: #e8cd45; --on-mark: #13201b; --pend-bg: #3a3110; --pend-fg: #f2dc8a; --bad: #ff9a85;
    --bubble-me: #1f7a5f; --bubble-me-fg: #ffffff; --bubble-bot: #1a2a23; --phone: #050a08;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0d1512; --paper-2: #14201b; --card: #111c17; --ink: #e7f0eb; --ink-2: #9fb2a9; --line: #26362f;
  --grid: rgba(231, 240, 235, .05); --margin: #5a3b37; --green: #5fd3a8; --on-green: #07140f; --green-soft: #16322a;
  --mark: #e8cd45; --on-mark: #13201b; --pend-bg: #3a3110; --pend-fg: #f2dc8a; --bad: #ff9a85;
  --bubble-me: #1f7a5f; --bubble-me-fg: #ffffff; --bubble-bot: #1a2a23; --phone: #050a08;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background-color: var(--paper);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }
a { color: var(--green); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--green); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.08; letter-spacing: -.02em; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(2.5rem, 6.4vw, 4.7rem); font-weight: 800; }
h2 { font-size: clamp(1.75rem, 3.3vw, 2.6rem); font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 700; letter-spacing: -.01em; }
p { margin: 0; }
mark { background: linear-gradient(transparent 55%, var(--mark) 55%, var(--mark) 92%, transparent 92%); color: inherit; padding: 0 .08em; }
/* en el tema oscuro el texto es claro: el marcatextos pasa a ser un subrayado grueso bajo la línea base para no cubrir las letras */
:root[data-theme="dark"] mark { background: linear-gradient(transparent 84%, var(--mark) 84%, var(--mark) 97%, transparent 97%); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) mark { background: linear-gradient(transparent 84%, var(--mark) 84%, var(--mark) 97%, transparent 97%); } }
.mono { font-family: var(--font-mono); }
.eyebrow { font-family: var(--font-mono); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); }

.wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding-inline: 20px; }
.sec { padding-block: clamp(56px, 9vw, 112px); }
@media (min-width: 960px) { .margen { border-inline-start: 2px solid var(--margin); padding-inline-start: 56px; margin-inline-start: 24px; } }

/* cabecera */
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: blur(6px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 16px; min-height: 64px; flex-wrap: wrap; }
.marca { font-family: var(--font-display); font-weight: 800; font-size: 1.45rem; letter-spacing: -.03em; color: var(--ink); text-decoration: none; display: inline-flex; align-items: center; gap: 8px; margin-inline-end: auto; }
.marca svg { width: 26px; height: 26px; }
.idioma { display: inline-flex; flex-wrap: wrap; border: 1.5px solid var(--ink); border-radius: 22px; overflow: hidden; }
.idioma a { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; min-width: 52px; padding: 0 10px; color: var(--ink); font: 600 .9rem var(--font-mono); text-decoration: none; }
.idioma a:hover { background: var(--paper-2); }
.idioma a[aria-current="true"] { background: var(--ink); color: var(--paper); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 22px; border-radius: 10px; font: 700 1rem var(--font-body); text-decoration: none; cursor: pointer; border: 2px solid var(--green); transition: transform .12s ease; }
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn-p { background: var(--green); color: var(--on-green); }
.btn-s { background: transparent; color: var(--green); }
.btn-e { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn-e:hover { background: var(--green); border-color: var(--green); color: var(--on-green); }
.btn-t { min-height: 44px; padding: 0 16px; border-color: var(--ink); color: var(--paper); background: var(--ink); }
.btn-t:hover { background: var(--green); border-color: var(--green); color: var(--on-green); }

/* hero */
.hero { padding-block: clamp(36px, 6vw, 72px) clamp(48px, 8vw, 96px); }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: clamp(28px, 5vw, 72px); align-items: start; }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: minmax(0, 1fr); } }
.estado { display: inline-flex; align-items: center; gap: 10px; padding: 6px 14px; border: 1.5px dashed var(--ink-2); border-radius: 999px; font: 500 .82rem var(--font-mono); color: var(--ink-2); margin-bottom: 22px; }
.estado i { width: 9px; height: 9px; border-radius: 50%; background: var(--mark); box-shadow: 0 0 0 2px var(--ink); }
.lead { font-size: clamp(1.1rem, 1.6vw, 1.3rem); max-width: 34em; margin-top: 22px; color: var(--ink); }
.ctas { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
.nota-hero { margin-top: 18px; font-size: .92rem; color: var(--ink-2); }

/* teléfono */
.tel { justify-self: center; width: min(100%, 340px); }
.tel-marco { background: var(--phone); border-radius: 34px; padding: 12px; box-shadow: 0 18px 40px rgba(0, 0, 0, .18); }
.tel-pantalla { background: var(--card); border-radius: 24px; overflow: hidden; border: 1px solid var(--line); }
.tel-cab { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-bottom: 1px solid var(--line); background: var(--paper-2); }
.tel-cab .av { width: 32px; height: 32px; border-radius: 50%; background: var(--green); color: var(--on-green); display: inline-flex; align-items: center; justify-content: center; font: 800 .95rem var(--font-display); }
.tel-cab b { display: block; font-size: .95rem; line-height: 1.2; }
.tel-cab span { font-size: .75rem; color: var(--ink-2); }
.chat { padding: 14px 12px 16px; display: flex; flex-direction: column; gap: 9px; }
.b { max-width: 88%; padding: 9px 12px; border-radius: 14px; font-size: .9rem; line-height: 1.42; }
.b.t { background: var(--bubble-bot); border-start-start-radius: 4px; align-self: flex-start; }
.b.u { background: var(--bubble-me); color: var(--bubble-me-fg); border-start-end-radius: 4px; align-self: flex-end; }
.fila { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { padding: 5px 11px; border-radius: 999px; border: 1.5px solid var(--green); color: var(--green); font: 600 .8rem var(--font-body); background: transparent; }
.quiz { align-self: flex-start; width: 94%; border: 1.5px solid var(--ink); border-radius: 12px; padding: 10px 12px; background: var(--card); }
.quiz .mono { font-size: .72rem; color: var(--ink-2); letter-spacing: .06em; text-transform: uppercase; }
.quiz p { font-size: .9rem; margin-top: 4px; }
.ops { display: flex; gap: 6px; margin-top: 8px; }
.ops span { flex: 1; text-align: center; padding: 5px 0; border: 1.5px solid var(--line); border-radius: 8px; font: 500 .85rem var(--font-mono); }
.ops .mal { border-color: var(--bad); color: var(--bad); }
.ops .bien { border-color: var(--green); background: var(--green-soft); color: var(--ink); }
.sep { align-self: center; font: 500 .7rem var(--font-mono); color: var(--ink-2); letter-spacing: .06em; text-transform: uppercase; padding: 2px 0; }
.ejemplo { margin-top: 12px; text-align: center; font: 500 .75rem var(--font-mono); color: var(--ink-2); }

/* cómo funciona */
.dos { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(28px, 5vw, 80px); align-items: start; }
@media (max-width: 900px) { .dos { grid-template-columns: minmax(0, 1fr); } }
.pasos { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; }
.pasos li { display: grid; grid-template-columns: 56px minmax(0, 1fr); gap: 16px; padding: 22px 0; border-top: 1.5px solid var(--ink); }
.pasos li:last-child { border-bottom: 1.5px solid var(--ink); }
.pasos .n { font: 500 1.9rem var(--font-mono); color: var(--green); line-height: 1; }
.pasos h3 { margin-bottom: 6px; }
.pasos p { color: var(--ink-2); max-width: 36em; }
.sticky { position: sticky; top: calc(88px + env(safe-area-inset-top, 0px)); }
@media (max-width: 900px) { .sticky { position: static; } }
.intro { margin-top: 16px; color: var(--ink-2); max-width: 30em; }

/* repaso */
.repaso { background: var(--paper-2); border-block: 1.5px solid var(--ink); }
.grafica { margin-top: 28px; background: var(--card); border: 1.5px solid var(--ink); border-radius: 14px; padding: 18px; }
.grafica svg { display: block; width: 100%; height: auto; }
.grafica .ax { fill: var(--ink-2); font: 500 12px var(--font-mono); }
.grafica .gr { stroke: var(--line); stroke-width: 1; }
.grafica .c1 { fill: none; stroke: var(--bad); stroke-width: 2.5; stroke-dasharray: 6 5; }
.grafica .c2 { fill: none; stroke: var(--green); stroke-width: 3; stroke-linejoin: round; }
.grafica .pt { fill: var(--mark); stroke: var(--ink); stroke-width: 1.5; }
.leyenda { display: flex; gap: 22px; flex-wrap: wrap; margin-top: 12px; font-size: .92rem; }
.leyenda span { display: inline-flex; align-items: center; gap: 8px; }
.leyenda i { width: 26px; height: 0; border-top: 3px solid var(--green); }
.leyenda i.d { border-top: 3px dashed var(--bad); }
.pie-g { margin-top: 10px; font-size: .85rem; color: var(--ink-2); }
.rec { margin-top: 24px; display: inline-flex; align-items: center; gap: 14px; border: 1.5px solid var(--ink); border-radius: 12px; padding: 12px 16px; background: var(--card); flex-wrap: wrap; }
.rec b { font: 500 1.35rem var(--font-mono); }
.rec span { font-size: .92rem; color: var(--ink-2); }

/* canales, llave, para quién */
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 0; margin-top: 32px; border-top: 1.5px solid var(--ink); }
.col { padding: 24px; padding-inline-start: 0; border-bottom: 1.5px solid var(--ink); }
.col + .col { padding-inline-start: 24px; border-inline-start: 1.5px solid var(--ink); }
@media (max-width: 640px) { .col + .col { padding-inline-start: 0; border-inline-start: 0; } }
.col h3 { margin-bottom: 8px; }
.col p { color: var(--ink-2); max-width: 30em; }
.llave { margin-top: 28px; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.llave div { background: var(--card); border: 1.5px solid var(--ink); border-radius: 12px; padding: 18px; }
.llave .mono { color: var(--green); font-size: .85rem; letter-spacing: .06em; text-transform: uppercase; }
.llave p { margin-top: 6px; }
.chica { margin-top: 16px; font-size: .92rem; color: var(--ink-2); max-width: 44em; }
.pend-x { display: inline-block; background: var(--pend-bg); color: var(--pend-fg); border: 1.5px dashed var(--pend-fg); border-radius: 6px; padding: 0 8px; font: 500 .85em var(--font-mono); line-height: 1.6; }
.lista { margin: 24px 0 0; padding: 0; list-style: none; display: grid; gap: 14px; max-width: 46em; }
.lista li { display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: 12px; }
.lista svg { width: 22px; height: 22px; color: var(--green); margin-top: 3px; }

/* preguntas */
.faq { margin-top: 28px; border-top: 1.5px solid var(--ink); max-width: 52em; }
.faq details { border-bottom: 1.5px solid var(--ink); }
.faq summary { min-height: 56px; display: flex; align-items: center; justify-content: space-between; gap: 16px; cursor: pointer; font: 700 1.08rem var(--font-display); list-style: none; padding: 10px 0; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 500 1.6rem var(--font-mono); color: var(--green); flex: none; }
.faq details[open] summary::after { content: "–"; }
.faq .r { padding: 0 0 20px; color: var(--ink-2); max-width: 44em; }

/* invitación: bloque siempre oscuro, con sus propios colores, para que el amarillo tenga contraste en ambos temas */
.inv { background: var(--inv-bg); color: var(--inv-fg); }
.inv h2 { color: var(--inv-fg); }
.inv .eyebrow { color: color-mix(in srgb, var(--inv-fg) 72%, transparent); }
.inv .lead { color: color-mix(in srgb, var(--inv-fg) 85%, transparent); }
.form { margin-top: 28px; display: grid; gap: 16px; max-width: 520px; }
.form label { display: block; font-weight: 600; font-size: .95rem; margin-bottom: 6px; }
.form input[type="text"], .form input[type="email"], .form textarea { width: 100%; min-height: 48px; border-radius: 10px; border: 2px solid color-mix(in srgb, var(--inv-fg) 45%, transparent); background: color-mix(in srgb, var(--inv-fg) 8%, transparent); color: var(--inv-fg); font: 1rem var(--font-body); padding: 10px 14px; }
.form textarea { min-height: 96px; resize: vertical; }
.form input::placeholder, .form textarea::placeholder { color: color-mix(in srgb, var(--inv-fg) 60%, transparent); }
.form .ck { display: flex; gap: 12px; align-items: flex-start; font-size: .95rem; }
.form .ck input { width: 22px; height: 22px; margin-top: 2px; accent-color: var(--inv-mark); flex: none; }
.form .btn-p { background: var(--inv-mark); color: #13201b; border-color: var(--inv-mark); width: fit-content; }
.inv :focus-visible { outline-color: var(--inv-mark); }
.aviso { min-height: 1.5em; font-weight: 600; color: var(--inv-mark); }
.sin-arriba { padding-top: 0; }
.pie { padding-block: 28px; font-size: .9rem; color: var(--ink-2); }
.pie .wrap { display: flex; gap: 12px 28px; flex-wrap: wrap; justify-content: space-between; }
.pie .prox { text-decoration: none; }
.solo-lector { position: absolute; left: -9999px; }

/* marca del logotipo (relleno por clase: la CSP no admite estilos en línea) */
.marca-marca { fill: var(--mark); }
/* campo trampa contra robots: fuera de la vista, no accesible ni enfocable */
.trampa { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
/* páginas «próximamente» (Términos y Privacidad) */
.pronto { padding-block: clamp(64px, 12vw, 140px); }
.pronto h1 { font-size: clamp(2rem, 5vw, 3.4rem); }
.pronto p { margin-top: 18px; max-width: 34em; color: var(--ink-2); }
.pronto .btn { margin-top: 28px; }
.btn[disabled] { opacity: .7; cursor: progress; }