/* ============================================================
   CYPHER INTELLIGENCE — LAYOUT
   nav · container · sections · grids · footer · responsive
   ============================================================ */

/* — Container —————————————————————————————————— */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* — Scroll progress bar ——————————————————————— */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-bright));
  box-shadow: 0 0 12px var(--accent);
  z-index: 200;
  transition: width 80ms linear;
}

/* — Navigation ————————————————————————————————— */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(5, 8, 15, 0);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
  transition: background var(--duration) var(--ease),
              border-color var(--duration) var(--ease),
              backdrop-filter var(--duration) var(--ease);
}
.nav.is-scrolled {
  background: rgba(5, 8, 15, 0.72);
  border-bottom-color: var(--ink-line);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
}

.nav__inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink-fg);
}
.nav__brand img {
  width: 30px;
  height: 30px;
  object-fit: contain;
  filter: drop-shadow(0 0 10px var(--accent-glow));
}
.nav__brand .wm {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 14px;
  letter-spacing: 0.14em;
}
.nav__brand .wm b {
  font-weight: 600;
  color: var(--accent-bright);
}

.nav__links {
  display: flex;
  gap: var(--space-6);
  align-items: center;
}
.nav__links a {
  position: relative;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-fg-dim);
  padding: 8px 0;
  white-space: nowrap;
  transition: color var(--duration-fast) var(--ease);
}
.nav__links a:hover {
  color: var(--ink-fg);
}
.nav__links a.is-active {
  color: var(--accent);
}
.nav__links a.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 4px;
  height: 4px;
  background: var(--accent);
  transform: translateX(-50%);
  box-shadow: 0 0 8px var(--accent);
}

.nav__aside {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__social-icons {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav__linkedin {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: var(--ink-fg-dim);
  flex-shrink: 0;
  transition: color var(--duration-fast) var(--ease);
}

.nav__linkedin:hover {
  color: var(--ink-fg);
}

.nav__linkedin svg {
  width: 18px;
  height: 18px;
}

.nav__burger {
  display: none;
  width: 36px;
  height: 36px;
  border: 1px solid var(--ink-line-2);
  border-radius: var(--radius-sm);
  background: rgba(14, 22, 38, 0.6);
  position: relative;
}
.nav__burger span {
  position: absolute;
  left: 9px;
  right: 9px;
  height: 1px;
  background: var(--ink-fg);
  transition: transform var(--duration-fast) var(--ease),
              opacity var(--duration-fast) var(--ease);
}
.nav__burger span:nth-child(1) { top: 13px; }
.nav__burger span:nth-child(2) { top: 18px; }
.nav__burger span:nth-child(3) { top: 23px; }
.nav__burger.is-open span:nth-child(1) { top: 18px; transform: rotate(45deg); }
.nav__burger.is-open span:nth-child(2) { opacity: 0; }
.nav__burger.is-open span:nth-child(3) { top: 18px; transform: rotate(-45deg); }

/* — Sections ——————————————————————————————————— */
.section {
  position: relative;
  padding-top: var(--space-9);
  padding-bottom: var(--space-9);
  z-index: 2;
}
.section--tight { padding-top: var(--space-8); padding-bottom: var(--space-8); }
.section--bleed { padding-top: 0; padding-bottom: 0; }

.section__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-5);
  margin-bottom: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid var(--ink-line);
}
.section__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--type-mono);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
}
.section__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--type-h2);
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--ink-fg);
}
.section__title em {
  font-style: normal;
  background: linear-gradient(180deg, #FFFFFF 0%, var(--accent-bright) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.section__note {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--type-mono);
  color: var(--ink-fg-mute);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.section__lead {
  font-size: var(--type-lead);
  color: var(--ink-fg-dim);
  max-width: 64ch;
  line-height: 1.55;
  margin-bottom: var(--space-8);
}

/* — Footer layout ————————————————————————————— */
.footer {
  position: relative;
  z-index: 2;
  background:
    var(--radar-bg) bottom right / 700px 700px no-repeat,
    var(--ink-bg);
  border-top: 1px solid var(--ink-line);
  padding: var(--space-6) 0 var(--space-5);
}
.footer__inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.footer__grid {
  display: grid;
  grid-template-columns: 320px 1fr 1fr 1fr;
  column-gap: var(--space-6);
  row-gap: var(--space-5);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--ink-line);
}
.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 340px;
}
.footer__logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.footer__logo img { width: 38px; filter: drop-shadow(0 0 14px var(--accent-glow)); }
.footer__logo .wm {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 18px;
  letter-spacing: 0.12em;
}
.footer__logo .wm b { font-weight: 600; color: var(--accent-bright); }
.footer__brand p {
  font-size: 13px;
  color: var(--ink-fg-dim);
  line-height: 1.55;
}
.footer__col h4 {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  font-weight: 500;
}
.footer__col ul {
  display: grid;
  gap: 12px;
}
.footer__col li a {
  font-size: 14px;
  color: var(--ink-fg-dim);
  transition: color var(--duration-fast) var(--ease);
}
.footer__col li a:hover { color: var(--accent); }

.footer__bottom {
  margin-top: var(--space-3);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-fg-mute);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.footer__socials {
  display: flex;
  gap: var(--space-5);
}
.footer__socials a {
  color: var(--ink-fg-mute);
  transition: color var(--duration-fast) var(--ease);
}
.footer__socials a:hover { color: var(--accent); }
.footer__social-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
}
.footer__social-icon svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* — Page background grid ———————————————————— */
.page-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, #000 30%, transparent 100%);
  opacity: 0.5;
}

/* — Side rails / coordinates ———————————————— */
.side-rail {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink-fg-mute);
  writing-mode: vertical-rl;
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.side-rail--left {
  left: 18px;
}
.side-rail--right {
  right: 18px;
  transform: translateY(-50%) rotate(180deg);
}
.side-rail::before {
  content: "";
  display: block;
  width: 1px;
  height: 60px;
  background: linear-gradient(180deg, transparent, var(--ink-line), transparent);
}

/* — Responsive ———————————————————————————————— */
@media (max-width: 1100px) {
  .nav__links { gap: var(--space-5); }
  /* Brand on top (full width); the three link columns sit in a row below */
  .footer__grid { grid-template-columns: repeat(3, 1fr); }
  .footer__brand { grid-column: 1 / -1; max-width: 560px; }
}

@media (max-width: 900px) {
  .section { padding-top: var(--space-10); padding-bottom: var(--space-10); }
  .section__head { gap: var(--space-3); flex-wrap: wrap; }
  .section__note { display: none; }

  .nav__links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    padding: var(--space-7) var(--gutter);
    gap: var(--space-5);
    background: rgba(5, 8, 15, 0.96);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--ink-line);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--duration) var(--ease),
                opacity var(--duration) var(--ease);
  }
  .nav__links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav__links a {
    font-size: 18px;
    letter-spacing: 0.08em;
    padding: 12px 0;
    width: 100%;
    border-bottom: 1px solid var(--ink-line);
  }

  .nav__burger { display: block; }
  /* El nav lleva backdrop-filter (efecto cristal) de forma permanente para poder
     transicionarlo al hacer scroll. Eso lo convierte en bloque contenedor de sus
     hijos position:fixed y colapsaba el panel del menú (y descolocaba el CTA). Al
     abrir el menú le quitamos el filtro (el propio panel ya aporta el desenfoque)
     para que panel y CTA se posicionen respecto al viewport. */
  .nav:has(.nav__links.is-open) {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: rgba(5, 8, 15, 0.96);
  }
  /* CTA: oculto en la barra superior; reaparece anclado abajo cuando se abre el
     menú, para que el botón principal no desaparezca en móvil. */
  .nav__aside .btn { display: none; }
  .nav__links.is-open ~ .nav__aside .btn {
    display: inline-flex;
    position: fixed;
    left: var(--gutter);
    right: var(--gutter);
    bottom: calc(var(--space-7) + env(safe-area-inset-bottom, 0px));
    justify-content: center;
    z-index: 101;
  }

  /* footer grid handled by the ≤1100 rule (brand on top + 3 link columns) */

  .side-rail { display: none; }
}

@media (max-width: 560px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 500px) {
  .footer__bottom { font-size: 9px; flex-direction: column; align-items: flex-start; }
}