/* frikiNODE — frikinode.org
   Paleta tomada del logo con cuentagotas: negro #010406, azul #01ACFE, blanco #FDFEFE.
   La malla hexagonal, las trazas de circuito y el resplandor salen del propio logo y
   se extienden por la pagina, para que la marca no quede como una pegatina encima. */

@font-face { font-family: "IBM Plex Sans"; font-style: normal; font-weight: 400;
  src: url("/fuentes/ibm-plex-sans-latin-400-normal.woff2") format("woff2"); font-display: swap; }
@font-face { font-family: "IBM Plex Sans"; font-style: normal; font-weight: 600;
  src: url("/fuentes/ibm-plex-sans-latin-600-normal.woff2") format("woff2"); font-display: swap; }
@font-face { font-family: "IBM Plex Sans"; font-style: normal; font-weight: 700;
  src: url("/fuentes/ibm-plex-sans-latin-700-normal.woff2") format("woff2"); font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 400;
  src: url("/fuentes/ibm-plex-mono-latin-400-normal.woff2") format("woff2"); font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 500;
  src: url("/fuentes/ibm-plex-mono-latin-500-normal.woff2") format("woff2"); font-display: swap; }

:root {
  --negro:    #010406;
  --panel:    #061520;
  --panel-2:  #020b12;
  --linea:    #0c2434;
  --linea-2:  #14425e;
  --azul:     #01acfe;
  --azul-sub: #6fd3ff;
  --blanco:   #fdfefe;
  --texto:    #c2d8e4;
  --apagado:  #7691a1;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
  --ancho: 1160px;
  --hex: polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%);
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--negro);
  color: var(--texto);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--azul-sub); text-decoration: none; }
a:hover { color: var(--blanco); }
:focus-visible { outline: 2px solid var(--azul); outline-offset: 3px; }

.contenedor { width: 100%; max-width: var(--ancho); margin: 0 auto; padding: 0 24px; }

.saltar { position: absolute; left: -9999px; top: 0; z-index: 30;
  background: var(--azul); color: var(--negro); padding: 10px 16px; font-weight: 600; }
.saltar:focus { left: 8px; top: 8px; }

/* ---------- barra ---------- */

.barra { position: sticky; top: 0; z-index: 20;
  background: rgba(1, 4, 6, .78); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--linea); }
.barra-int { display: flex; align-items: center; gap: 28px; height: 62px; }
.marca { display: flex; align-items: center; flex: none; }
.marca img { height: 30px; width: auto;
  filter: drop-shadow(0 0 12px rgba(1, 172, 254, .3));
  transition: filter .18s ease; }
.marca:hover img { filter: drop-shadow(0 0 16px rgba(1, 172, 254, .65)); }
.barra nav { display: flex; gap: 26px; margin-left: auto; }
.barra nav a { font-family: var(--mono); font-size: .78rem; text-transform: uppercase;
  letter-spacing: .12em; color: var(--apagado); }
.barra nav a:hover { color: var(--azul); }

/* ---------- botones ---------- */

.boton { display: inline-block; padding: 14px 26px; border-radius: 2px;
  background: var(--azul); color: #001018; font-weight: 600; font-size: .97rem;
  border: 1px solid var(--azul);
  transition: background .15s ease, box-shadow .15s ease, transform .15s ease; }
.boton:hover { background: #35c1ff; color: #001018; transform: translateY(-1px);
  box-shadow: 0 12px 34px -14px rgba(1, 172, 254, .9); }
.boton-linea { background: transparent; color: var(--blanco); border-color: var(--linea-2); }
.boton-linea:hover { background: rgba(1, 172, 254, .08); border-color: var(--azul); box-shadow: none; }
.boton-mini { padding: 8px 16px; font-size: .85rem; }
.boton-grande { padding: 18px 42px; font-size: 1.08rem; }
.botones { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- portada ---------- */

.portada { position: relative; overflow: hidden; border-bottom: 1px solid var(--linea); }

.campo { position: absolute; inset: 0; pointer-events: none; }
.malla, .circuitos { position: absolute; inset: 0; width: 100%; height: 100%; }
.malla { opacity: .34;
  -webkit-mask-image: radial-gradient(105% 78% at 50% 34%, #000 12%, transparent 74%);
  mask-image: radial-gradient(105% 78% at 50% 34%, #000 12%, transparent 74%); }
.circuitos { opacity: .3;
  -webkit-mask-image: linear-gradient(90deg, #000, transparent 34%, transparent 66%, #000);
  mask-image: linear-gradient(90deg, #000, transparent 34%, transparent 66%, #000); }
.destello { position: absolute; left: 50%; top: 30%; width: min(1150px, 130%); aspect-ratio: 2 / 1;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse at center, rgba(1, 172, 254, .17), rgba(1, 172, 254, .05) 42%, transparent 68%); }
.portada::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--azul), transparent); opacity: .5; }

.portada-int { position: relative; padding: 30px 24px 76px; }

.marca-grande {
  width: min(455px, 76%); margin: 0 auto 34px;
  filter: drop-shadow(0 0 34px rgba(1, 172, 254, .38)) drop-shadow(0 0 84px rgba(1, 172, 254, .2));
}

.portada-texto { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 64px; align-items: end; }
.portada-lado { padding-bottom: 6px; }

.rotulo { font-family: var(--mono); font-size: .78rem; text-transform: uppercase;
  letter-spacing: .2em; color: var(--azul); margin: 0 0 16px; }
h1 { font-size: clamp(2.6rem, 6.4vw, 4.6rem); line-height: 1.02; letter-spacing: -.038em;
  font-weight: 700; color: var(--blanco); margin: 0; }
.entrada { font-size: clamp(1.02rem, 1.5vw, 1.18rem); max-width: 44ch; margin: 0 0 28px; }
.entrada strong { color: var(--blanco); font-weight: 600; }
.apunte { font-family: var(--mono); font-size: .82rem; line-height: 1.6; color: var(--apagado); margin: 22px 0 0; }

/* ---------- secciones y su carril ---------- */

.seccion { padding: 96px 0; border-bottom: 1px solid var(--linea); }
.seccion-marcada { background: var(--panel-2); }

.rail { position: relative; border-left: 1px solid var(--linea); padding-left: 40px; }

.num { font-family: var(--mono); font-size: .78rem; text-transform: uppercase; letter-spacing: .18em;
  color: var(--azul); margin: 0 0 28px; display: flex; align-items: center; gap: 14px; }

.hexnum { position: absolute; left: 0; transform: translateX(-50%);
  width: 34px; height: 38px; flex: none; clip-path: var(--hex); background: var(--azul);
  color: #001018; font-family: var(--mono); font-weight: 500; font-size: .8rem;
  display: flex; align-items: center; justify-content: center; letter-spacing: 0; }
.num .hexnum { margin-left: -40px; position: static; transform: translateX(-50%); }

h2 { font-size: clamp(1.9rem, 4vw, 3rem); line-height: 1.06; letter-spacing: -.032em;
  font-weight: 700; color: var(--blanco); margin: 0 0 22px; }
.parrafo { font-size: 1.06rem; max-width: 60ch; margin: 0 0 20px; }
.parrafo strong { color: var(--blanco); font-weight: 600; }
.h3-suelto { font-size: 1.2rem; color: var(--blanco); font-weight: 600; letter-spacing: -.015em; margin: 0 0 10px; }

/* ---------- tarjetas ---------- */

.rejilla { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; margin-top: 44px; }
.tarjeta { position: relative; grid-column: span 2;
  background: var(--panel); border: 1px solid var(--linea); border-radius: 2px;
  padding: 28px 24px 30px; transition: border-color .18s ease, background .18s ease; }
.tarjeta::before { content: ""; position: absolute; top: -1px; left: -1px; width: 28px; height: 2px;
  background: var(--azul); transition: width .18s ease; }
.t-ancha { grid-column: span 3; }
.tarjeta:hover { border-color: var(--linea-2); background: #071c29; }
.tarjeta:hover::before { width: 56px; }
.tarjeta h3 { font-size: 1.14rem; color: var(--blanco); font-weight: 600;
  letter-spacing: -.015em; line-height: 1.32; margin: 0 0 10px; }
.tarjeta p { margin: 0; font-size: .97rem; }

.etiqueta { font-family: var(--mono); font-size: .72rem; text-transform: uppercase;
  letter-spacing: .16em; color: var(--azul); margin: 0 0 14px; }
.pie-rejilla { font-family: var(--mono); font-size: .82rem; color: var(--apagado); margin: 24px 0 0; }

/* ---------- dos columnas y lista ---------- */

.dos-columnas { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: start; }

.lista { list-style: none; margin: 0; padding: 0; }
.lista li { position: relative; padding: 15px 0 15px 28px; border-bottom: 1px solid var(--linea); color: var(--blanco); }
.lista li:first-child { padding-top: 0; }
.lista li:last-child { border-bottom: 0; }
.lista li::before { content: ""; position: absolute; left: 0; top: 23px;
  width: 9px; height: 10px; background: var(--azul); clip-path: var(--hex); }
.lista li:first-child::before { top: 8px; }

/* ---------- comandos ---------- */

.mono { font-family: var(--mono); color: var(--blanco); }
.cmd { font-family: var(--mono); font-size: .92em; font-weight: 500; color: var(--azul);
  background: rgba(1, 172, 254, .09); border: 1px solid rgba(1, 172, 254, .3);
  border-radius: 2px; padding: 2px 8px; white-space: nowrap; }
.comandos { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 36px 0 38px; }
.comandos > div { display: flex; flex-direction: column; gap: 10px; align-items: flex-start;
  border-left: 2px solid var(--linea-2); padding: 4px 0 4px 16px; }
.comandos span:last-child { font-size: .92rem; color: var(--apagado); }

/* ---------- cierre ---------- */

.cierre { padding: 104px 0; text-align: center; }
.hexnum-suelto { position: static; transform: none; margin: 0 auto 26px; width: 26px; height: 29px; }
.cierre h2 { margin-bottom: 16px; }
.parrafo-centrado { margin: 0 auto 34px; text-align: center; }
.cierre .botones { justify-content: center; }
.redes { list-style: none; display: flex; flex-wrap: wrap; justify-content: center;
  gap: 14px; margin: 54px 0 0; padding: 0; }
.redes a { display: block; min-width: 196px; padding: 20px 24px; background: var(--panel);
  border: 1px solid var(--linea); border-radius: 2px; color: var(--blanco);
  font-weight: 600; text-align: left; transition: border-color .18s ease, background .18s ease; }
.redes a:hover { border-color: var(--azul); background: #071c29; }
.redes .etiqueta { display: block; margin-bottom: 6px; }

/* ---------- pie ---------- */

.pie { border-top: 1px solid var(--linea); padding: 26px 0; }
.pie-int { display: flex; flex-wrap: wrap; gap: 10px 28px; justify-content: space-between;
  font-family: var(--mono); font-size: .78rem; color: var(--apagado); }

/* ---------- pantallas pequeñas ---------- */

@media (max-width: 940px) {
  .portada-texto { grid-template-columns: 1fr; gap: 28px; }
  .rejilla { grid-template-columns: repeat(2, 1fr); }
  .tarjeta, .t-ancha { grid-column: span 1; }
  .dos-columnas { grid-template-columns: 1fr; gap: 34px; }
  .comandos { grid-template-columns: repeat(2, 1fr); }
  .barra nav { display: none; }
  .seccion { padding: 70px 0; }
  .portada-int { padding: 30px 24px 66px; }
  .rail { padding-left: 28px; }
  .num .hexnum { margin-left: -28px; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .rejilla, .comandos { grid-template-columns: 1fr; }
  .botones .boton { width: 100%; text-align: center; }
  .redes a { min-width: 0; width: 100%; }
  .pie-int { justify-content: flex-start; }
  .rail { border-left: 0; padding-left: 0; }
  .num .hexnum { margin-left: 0; transform: none; }
  .marca-grande { width: 100%; margin-bottom: 34px; }
}