/* =========================================================
   Marcelo Alés — Cursos de informática
   Estilo: claro y liviano, "papel" cálido, resaltador amarillo y
   sombras sólidas de color. Lectura grande y clara.
   Variables de color y tipografía en :root (ver docs/estilo.md).
   ========================================================= */

/* ---------- Tipografías (alojadas en el servidor) ---------- */
@font-face { font-family: "Space Grotesk"; font-weight: 600; font-display: swap; src: url("../fonts/space-grotesk-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "Space Grotesk"; font-weight: 700; font-display: swap; src: url("../fonts/space-grotesk-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 400; font-display: swap; src: url("../fonts/inter-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 600; font-display: swap; src: url("../fonts/inter-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-weight: 500; font-display: swap; src: url("../fonts/jetbrains-mono-latin-500-normal.woff2") format("woff2"); }

/* ---------- Variables ---------- */
:root {
  --color-oscuro: #131B2E;          /* tinta: texto y detalles firmes */
  --color-oscuro-2: #1C2740;
  --color-fondo: #F8F7F3;           /* papel cálido */
  --color-fondo-2: #EFEDE6;         /* papel más profundo (pie) */
  --color-cielo: #E6EEFF;           /* celeste muy claro (secciones suaves) */
  --color-superficie: #FFFFFF;
  --color-borde: #E6E2D8;
  --color-texto: #131B2E;
  --color-texto-suave: #4B5568;
  --color-texto-claro: #E2E8F0;
  --color-texto-claro-2: #CBD5E1;
  --color-primario: #2352E8;        /* cobalto */
  --color-acento: #FFD84A;          /* resaltador: nunca como texto, siempre de fondo */
  --color-whatsapp: #25D366;

  --f-titulo: "Space Grotesk", system-ui, sans-serif;
  --f-texto: "Inter", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, monospace;

  --radio: 24px;
  --ancho: 1160px;
  --sombra: 0 1px 2px rgba(19, 27, 46, .05), 0 18px 40px -22px rgba(19, 27, 46, .22);
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 18px; scroll-behavior: smooth; scroll-padding-top: 84px; }
body { font-family: var(--f-texto); color: var(--color-texto); background: var(--color-fondo); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: var(--f-titulo); font-weight: 600; line-height: 1.12; letter-spacing: -.025em; }
:focus-visible { outline: 3px solid var(--color-primario); outline-offset: 3px; border-radius: 8px; }
.contenedor { max-width: var(--ancho); margin: 0 auto; padding: 0 24px; }
.mono { display: inline-block; font-family: var(--f-mono); font-size: .85rem; letter-spacing: .02em; color: var(--color-primario); background: rgba(35, 82, 232, .08); padding: 6px 14px; border-radius: 999px; }
.saltar { position: absolute; left: -999px; top: 8px; background: #fff; color: var(--color-texto); padding: 10px 16px; border-radius: 12px; z-index: 100; }
.saltar:focus { left: 8px; }

/* ---------- Botones ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 54px; padding: 0 28px; border-radius: 999px; font-weight: 600; font-size: 1rem; line-height: 1.2; white-space: nowrap; transition: transform .2s, box-shadow .2s, background .2s, border-color .2s; }
.btn:hover { transform: translateY(-2px); }
.btn-wa { background: var(--color-whatsapp); color: var(--color-oscuro); box-shadow: 0 10px 24px -10px rgba(37, 211, 102, .8); }
.btn-wa:hover { box-shadow: 0 14px 28px -10px rgba(37, 211, 102, .95); }
.btn-borde { background: var(--color-superficie); border: 1.5px solid rgba(19, 27, 46, .18); color: var(--color-texto); }
.btn-borde:hover { border-color: var(--color-primario); color: var(--color-primario); }
.btn-chico { min-height: 46px; padding: 0 20px; font-size: .92rem; }
.btn-grande { min-height: 62px; padding: 0 36px; font-size: 1.1rem; }
.i-wa { width: 22px; height: 22px; flex: none; }

/* ---------- Header ---------- */
.cabecera { position: sticky; top: 0; z-index: 40; background: rgba(248, 247, 243, .82); backdrop-filter: blur(14px) saturate(1.2); -webkit-backdrop-filter: blur(14px) saturate(1.2); border-bottom: 1px solid rgba(19, 27, 46, .07); }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 20px; height: 74px; }
.logo { font-family: var(--f-titulo); font-weight: 700; font-size: 1.25rem; color: var(--color-oscuro); white-space: nowrap; }
.logo span { color: var(--color-primario); animation: parpadeo 1.1s steps(1) infinite; }
@keyframes parpadeo { 50% { opacity: 0; } }
.menu { display: flex; gap: 6px; margin-left: auto; font-size: .95rem; font-weight: 600; color: var(--color-texto-suave); }
.menu a { padding: 8px 16px; border-radius: 999px; transition: background .2s, color .2s; }
.menu a:hover { background: rgba(35, 82, 232, .08); color: var(--color-primario); }
.nav-acciones { display: flex; align-items: center; gap: 14px; }
.hamburguesa { display: none; width: 46px; height: 46px; background: var(--color-superficie); border: 1px solid rgba(19, 27, 46, .15); border-radius: 14px; cursor: pointer; flex-direction: column; justify-content: center; align-items: center; gap: 5px; }
.hamburguesa span { width: 20px; height: 2px; background: var(--color-oscuro); border-radius: 2px; transition: transform .2s, opacity .2s; }
.hamburguesa[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburguesa[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburguesa[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; background: var(--color-fondo); color: var(--color-texto); padding: 80px 0 104px; }
.hero::before { content: ""; position: absolute; inset: 0; background-image: radial-gradient(rgba(19, 27, 46, .16) 1.2px, transparent 1.6px); background-size: 24px 24px; -webkit-mask-image: radial-gradient(ellipse at 72% 40%, #000 10%, transparent 70%); mask-image: radial-gradient(ellipse at 72% 40%, #000 10%, transparent 70%); }
.hero::after { content: ""; position: absolute; inset: 0; pointer-events: none; background:
  radial-gradient(circle at 80% 18%, rgba(125, 170, 255, .38), transparent 36%),
  radial-gradient(circle at 96% 78%, rgba(255, 216, 74, .34), transparent 32%),
  radial-gradient(circle at 4% 90%, rgba(150, 230, 200, .32), transparent 30%); filter: blur(12px); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: center; }
.hero .mono { background: var(--color-superficie); border: 1px solid var(--color-borde); box-shadow: 0 6px 16px -10px rgba(19, 27, 46, .25); }
.hero h1 { font-size: 3.5rem; color: var(--color-oscuro); margin: 20px 0 22px; letter-spacing: -.03em; }
.hero h1 em { font-style: normal; padding: 0 .14em; margin: 0 -.14em; background: linear-gradient(transparent 56%, var(--color-acento) 56%, var(--color-acento) 90%, transparent 90%); -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.hero .sub { font-size: 1.2rem; max-width: 34ch; color: var(--color-texto-suave); }
.acciones { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 34px; }
.chips { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 36px; font-size: .92rem; font-weight: 600; color: var(--color-texto); list-style: none; }
.chips li { display: flex; align-items: center; gap: 8px; padding: 8px 16px; background: var(--color-superficie); border: 1px solid var(--color-borde); border-radius: 999px; }
.chips li::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--color-primario); }

/* Ventana ilustrada */
.ventana { background: var(--color-superficie); border: 1.5px solid rgba(19, 27, 46, .12); border-radius: 26px; box-shadow: 14px 14px 0 #CFE0FF, 0 40px 70px -30px rgba(19, 27, 46, .35); overflow: hidden; transform: rotate(1.2deg); }
.barra { display: flex; align-items: center; gap: 8px; padding: 14px 18px; background: var(--color-fondo); border-bottom: 1px solid var(--color-borde); }
.barra i { width: 12px; height: 12px; border-radius: 50%; }
.barra i:nth-child(1) { background: #F87171; } .barra i:nth-child(2) { background: #FBBF24; } .barra i:nth-child(3) { background: #34D399; }
.barra .mono { margin-left: 10px; padding: 0; background: none; border-radius: 0; font-size: .8rem; color: #5B6577; }
.escritorio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding: 26px; }
.app { display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 18px 8px; border-radius: 18px; background: var(--color-fondo); border: 1px solid var(--color-borde); font-size: .82rem; font-weight: 600; color: var(--color-texto); text-align: center; }
.app .ico { width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; color: #fff; }
.app .ico svg { width: 28px; height: 28px; }
.app.activo { background: var(--color-superficie); border-color: var(--color-primario); box-shadow: 0 0 0 3px rgba(35, 82, 232, .15), 0 14px 24px -14px rgba(35, 82, 232, .5); }
.app.cursor { position: relative; }
.app.cursor::after { content: ""; position: absolute; right: 16px; bottom: 6px; width: 24px; height: 24px; background: var(--color-oscuro); clip-path: polygon(0 0, 0 100%, 30% 72%, 52% 100%, 64% 94%, 42% 66%, 80% 66%); filter: drop-shadow(0 0 1px #fff) drop-shadow(0 3px 4px rgba(19, 27, 46, .35)); }
.app-mas { opacity: .75; background: transparent; border-style: dashed; }
.app-mas .ico { border: 1.5px dashed #94A3B8; color: #64748B; font-size: 1.4rem; }

/* ---------- Secciones ---------- */
.seccion { padding: 104px 0; }
.encabezado { max-width: 660px; margin-bottom: 52px; }
.encabezado h2 { font-size: 2.5rem; margin: 14px 0 16px; }
.encabezado p { color: var(--color-texto-suave); font-size: 1.08rem; }

/* Cursos */
.grilla { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.curso { --c: var(--color-primario); position: relative; overflow: hidden; background: var(--color-superficie); border: 1.5px solid var(--color-borde); border-radius: var(--radio); padding: 26px; display: flex; flex-direction: column; gap: 14px; box-shadow: var(--sombra); transition: transform .25s, box-shadow .25s, border-color .25s, opacity .6s; }
.curso::before { content: ""; position: absolute; right: -50px; top: -50px; width: 170px; height: 170px; border-radius: 50%; background: color-mix(in srgb, var(--c) 14%, #fff); pointer-events: none; }
.curso > * { position: relative; }
.curso:hover { transform: translate(-3px, -3px); border-color: var(--c); box-shadow: 8px 8px 0 color-mix(in srgb, var(--c) 28%, #fff); }
.curso .top { display: flex; align-items: center; justify-content: space-between; }
.curso .ico { width: 58px; height: 58px; border-radius: 18px; display: grid; place-items: center; background: var(--c); color: #fff; box-shadow: 0 12px 20px -12px var(--c); }
.curso .ico svg { width: 30px; height: 30px; }
.curso .num { font-family: var(--f-mono); font-size: .8rem; color: #5B6577; }
.curso h3 { font-size: 1.5rem; }
.curso p { color: var(--color-texto-suave); }
.curso ul { list-style: none; display: grid; gap: 8px; font-size: .95rem; }
.curso li { display: flex; gap: 12px; align-items: baseline; }
.curso li::before { content: ""; flex: none; width: 8px; height: 8px; border-radius: 50%; background: var(--c); transform: translateY(-1px); }
.consultar { margin-top: auto; padding-top: 12px; font-weight: 600; color: var(--color-primario); display: inline-flex; gap: 8px; align-items: center; transition: gap .2s; }
.consultar:hover { gap: 12px; }
.tarjeta-ayuda { background: #FFF1B8; border: 2px dashed rgba(19, 27, 46, .3); box-shadow: none; justify-content: center; }
.tarjeta-ayuda::before { display: none; }
.tarjeta-ayuda .mono { background: rgba(255, 255, 255, .75); }
.tarjeta-ayuda:hover { border-color: rgba(19, 27, 46, .55); box-shadow: 8px 8px 0 rgba(19, 27, 46, .12); }
.tarjeta-ayuda p { color: #3B4358; }
.tarjeta-ayuda .btn { align-self: flex-start; }

/* Cómo funciona */
.oscuro { background: var(--color-cielo); color: var(--color-texto); border-top: 1px solid rgba(35, 82, 232, .1); border-bottom: 1px solid rgba(35, 82, 232, .1); }
.oscuro .encabezado h2 { color: var(--color-oscuro); }
.oscuro .encabezado p { color: var(--color-texto-suave); }
.oscuro .mono { background: var(--color-superficie); }
.pasos { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; counter-reset: paso; }
.paso { background: var(--color-superficie); border: 1.5px solid rgba(19, 27, 46, .08); border-radius: var(--radio); padding: 26px; box-shadow: var(--sombra); }
.paso .n { display: grid; place-items: center; width: 60px; height: 60px; border-radius: 18px; background: var(--color-oscuro); color: #fff; font-family: var(--f-titulo); font-size: 1.5rem; font-weight: 700; box-shadow: 5px 5px 0 var(--color-acento); margin-bottom: 20px; }
.paso h3 { color: var(--color-oscuro); font-size: 1.35rem; margin: 8px 0; }
.paso p { color: var(--color-texto-suave); }

/* Sobre mí */
.sobre-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 72px; align-items: center; }
.foto-marco { position: relative; aspect-ratio: 1; max-width: 420px; width: 100%; justify-self: center; }
.foto-marco::before { content: ""; position: absolute; inset: 0; border-radius: 36px; background: var(--color-acento); transform: translate(16px, 16px) rotate(2.5deg); }
.foto-marco::after { content: ""; position: absolute; left: -18px; bottom: 36px; width: 56px; height: 56px; border-radius: 50%; background: var(--color-primario); border: 5px solid var(--color-fondo); }
.foto-marco img, .monograma { position: relative; z-index: 1; width: 100%; height: 100%; object-fit: cover; border-radius: 34px; border: 5px solid var(--color-superficie); box-shadow: var(--sombra); }
.monograma { display: grid; place-items: center; background: var(--color-cielo); color: var(--color-primario); font-family: var(--f-titulo); font-weight: 700; font-size: 6rem; letter-spacing: -.04em; background-image: radial-gradient(rgba(35, 82, 232, .18) 1.2px, transparent 1.6px); background-size: 22px 22px; }
.sobre-texto h2 { font-size: 2.5rem; margin: 14px 0 20px; }
.sobre-texto p { color: var(--color-texto-suave); font-size: 1.08rem; margin-bottom: 14px; }
.sobre-texto blockquote { margin-top: 24px; padding: 20px 24px; border: 1.5px solid var(--color-borde); border-left: 6px solid var(--color-acento); background: var(--color-superficie); border-radius: 6px 18px 18px 6px; font-family: var(--f-titulo); font-weight: 600; font-size: 1.2rem; color: var(--color-texto); box-shadow: var(--sombra); }

/* Contacto */
.contacto { padding-top: 0; text-align: center; }
.contacto .caja { position: relative; overflow: hidden; background: var(--color-superficie); border: 1.5px solid var(--color-borde); border-radius: 36px; padding: 72px 32px; box-shadow: var(--sombra); }
.contacto .caja::before { content: ""; position: absolute; inset: 0; pointer-events: none; background:
  radial-gradient(circle at 8% 12%, rgba(125, 170, 255, .3), transparent 32%),
  radial-gradient(circle at 94% 90%, rgba(255, 216, 74, .38), transparent 34%); }
.contacto .caja > * { position: relative; }
.contacto h2 { font-size: 2.5rem; margin: 14px 0 16px; }
.contacto p { color: var(--color-texto-suave); max-width: 46ch; margin: 0 auto 30px; font-size: 1.08rem; }

/* Footer */
.pie { background: var(--color-fondo-2); color: var(--color-texto-suave); padding: 52px 0 30px; font-size: .92rem; border-top: 1px solid var(--color-borde); }
.pie-grid { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding-bottom: 28px; border-bottom: 1px solid rgba(19, 27, 46, .1); }
.pie .logo { font-size: 1.15rem; }
.pie-grid p { margin-top: 6px; }
.pie-der { display: flex; flex-direction: column; align-items: flex-end; gap: 10px; font-weight: 600; }
.pie-der a:hover { color: var(--color-primario); }
.redes { list-style: none; display: flex; gap: 16px; }
.pie-legal { display: flex; justify-content: space-between; gap: 16px; padding-top: 22px; font-size: .82rem; }
.pie .admin { color: var(--color-texto-suave); }
.pie .admin:hover { color: var(--color-primario); }

/* Botón flotante de WhatsApp */
.wa-flotante { position: fixed; right: 24px; bottom: 24px; z-index: 50; width: 64px; height: 64px; border-radius: 50%; background: var(--color-whatsapp); color: var(--color-oscuro); display: none; place-items: center; box-shadow: 0 0 0 5px rgba(248, 247, 243, .9), 0 14px 30px -8px rgba(37, 211, 102, .75); transition: transform .2s; }
.wa-flotante:hover { transform: scale(1.06); }
.wa-flotante.escondido { opacity: 0; visibility: hidden; transform: scale(.8); }
.wa-flotante .i-wa { width: 34px; height: 34px; }

/* Aparición suave (solo si hay JS) */
.js .aparecer { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.js .aparecer.visible { opacity: 1; transform: none; }
.js .curso.aparecer.visible:hover { transform: translate(-3px, -3px); }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid, .sobre-grid { grid-template-columns: 1fr; }
  .grilla { grid-template-columns: repeat(2, 1fr); }
  .ventana { max-width: 460px; }
}
@media (max-width: 760px) {
  .hamburguesa { display: flex; }
  .nav-acciones .btn-chico { display: none; }
  .menu { position: absolute; top: 74px; left: 0; right: 0; flex-direction: column; gap: 0; background: rgba(248, 247, 243, .98); border-bottom: 1px solid var(--color-borde); padding: 8px 24px 16px; display: none; }
  .menu.abierto { display: flex; }
  .menu a { padding: 14px 4px; font-size: 1.05rem; border-radius: 0; border-bottom: 1px solid rgba(19, 27, 46, .07); }
  .menu a:hover { background: none; }
  .hero { padding: 44px 0 76px; }
  .hero h1 { font-size: 2.4rem; }
  .seccion { padding: 72px 0; }
  .contacto { padding-top: 0; }
  .encabezado h2, .sobre-texto h2, .contacto h2 { font-size: 1.95rem; }
  .grilla, .pasos { grid-template-columns: 1fr; }
  .escritorio { gap: 12px; padding: 18px; }
  .ventana { box-shadow: 9px 9px 0 #CFE0FF, 0 30px 50px -28px rgba(19, 27, 46, .35); }
  .ventana { display: none; }
  .hero-grid { gap: 0; }
  .acciones .btn { width: 100%; }
  .contacto .btn-grande { width: 100%; padding: 0 20px; font-size: 1rem; }
  .contacto .caja { padding: 52px 14px; border-radius: 28px; }
  .foto-marco { max-width: 300px; }
  .monograma { font-size: 4.5rem; }
  .pie-der { align-items: flex-start; }
  .wa-flotante { display: grid; right: 16px; bottom: 16px; width: 58px; height: 58px; transition: transform .2s, opacity .2s, visibility .2s; }
  .pie { padding-bottom: 96px; }
}

@media (max-width: 350px) {
  .btn, .contacto .btn-grande { padding: 0 12px; }
  .contacto .btn-grande .i-wa { display: none; }
}

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