/* Sección 2 — "Una visión. Tres campos de acción." */
.areas {
  position: relative;
  z-index: 2;
  padding: 140px var(--gutter) 120px;
  background: var(--cosmos);
}
.areas-head { max-width: 1320px; margin: 0 auto 96px; }
.areas-head h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(32px, 4.4vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.03em;
}
.areas-head h2 span { color: var(--nebula); }
.areas-index { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.areas-index a {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray);
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
}
.areas-index a b { color: var(--cyan); font-weight: 600; margin-right: 6px; }
.areas-index a:hover { border-color: var(--nebula); color: var(--white); }

.area {
  max-width: 1320px;
  margin: 0 auto;
  min-height: 78vh;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: clamp(40px, 6vw, 96px);
  align-items: center;
  padding: 40px 0;
}
.area + .area { margin-top: 40px; }
.area:nth-of-type(even) { grid-template-columns: 1fr 1.3fr; }
.area:nth-of-type(even) .panel { order: 2; }

/* ---------- Panel visual ---------- */
.panel {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: 28px;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid var(--line);
  background: #0c1126;
}
.panel svg.scene { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 3; overflow: visible; }
.panel .bg { position: absolute; inset: 0; z-index: 0; opacity: 0; transition: opacity 0.8s ease; }
.panel::after {
  /* viñeta común para que el SVG siempre se lea */
  content: '';
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: radial-gradient(120% 90% at 50% 50%, transparent 40%, rgba(9, 13, 29, 0.7));
}

/* Variante A — degradado dinámico: manchas de color difuminadas en movimiento */
.bg-gradient .bg.grad { opacity: 1; }
.blob { position: absolute; width: 70%; aspect-ratio: 1; border-radius: 50%; filter: blur(50px); opacity: 0.75; }
.blob:nth-child(1) { left: -15%; top: -20%; animation: drift-a 16s ease-in-out infinite alternate; }
.blob:nth-child(2) { right: -20%; bottom: -25%; animation: drift-b 19s ease-in-out infinite alternate; }
.blob:nth-child(3) { left: 30%; top: 35%; width: 45%; opacity: 0.45; animation: drift-c 13s ease-in-out infinite alternate; }
@keyframes drift-a { to { transform: translate(30%, 25%) scale(1.15); } }
@keyframes drift-b { to { transform: translate(-25%, -20%) scale(0.9); } }
@keyframes drift-c { to { transform: translate(-40%, -30%) scale(1.3); } }
[data-tone='senal'] .blob:nth-child(1) { background: #7a3ab0; }
[data-tone='senal'] .blob:nth-child(2) { background: #3b1f8c; }
[data-tone='senal'] .blob:nth-child(3) { background: #a76bff; }
[data-tone='sistema'] .blob:nth-child(1) { background: #542980; }
[data-tone='sistema'] .blob:nth-child(2) { background: #1d6f8f; }
[data-tone='sistema'] .blob:nth-child(3) { background: #7a3ab0; }
[data-tone='frontera'] .blob:nth-child(1) { background: #1a2b6b; }
[data-tone='frontera'] .blob:nth-child(2) { background: #542980; }
[data-tone='frontera'] .blob:nth-child(3) { background: #66dfff; opacity: 0.22; }

/* Variante B — imagen espacial en duotono con zoom lento */
.bg-image .bg.photo { opacity: 1; }
.bg.photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.6) contrast(1.1) url(#duo-violet);
  animation: kenburns 30s ease-in-out infinite alternate;
}
@keyframes kenburns { to { transform: scale(1.12) translate(-2%, -2%); } }
.bg.photo::after { content: ''; position: absolute; inset: 0; background: rgba(9, 13, 29, 0.45); }

/* Variante C — sobrio: superficie Azul Orbital con retícula */
.bg-plain .bg.plain { opacity: 1; }
.bg.plain {
  background:
    linear-gradient(rgba(164, 172, 198, 0.05) 1px, transparent 1px) 0 0 / 30px 30px,
    linear-gradient(90deg, rgba(164, 172, 198, 0.05) 1px, transparent 1px) 0 0 / 30px 30px,
    var(--orbital);
}

/* ---------- Texto ---------- */
.area-copy { max-width: 470px; opacity: 0; transform: translateY(24px); transition: opacity 0.9s ease, transform 0.9s cubic-bezier(0.2, 0.7, 0.2, 1); }
.area.is-in .area-copy { opacity: 1; transform: none; }
.concept {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 18px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}
.concept i { font-style: normal; font-family: var(--display); color: var(--gray); letter-spacing: 0.1em; }
.concept::after { content: ''; width: 40px; height: 1px; background: var(--cyan); opacity: 0.6; }
.area-copy h3 {
  margin: 0 0 18px;
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}
.area-copy p { margin: 0; color: var(--gray); font-size: 17px; line-height: 1.6; }

/* ---------- Tipografía dentro de los SVG ---------- */
.scene .lbl { font: 500 11px var(--ui); letter-spacing: 0.14em; fill: var(--gray); }
.scene .lbl-c { fill: var(--cyan); }
.scene .node-lbl { font: 500 11px var(--ui); fill: var(--white); letter-spacing: 0.04em; }

/* ---------- Selector de variante (solo boceto) ---------- */
.variant {
  position: fixed;
  left: 50%;
  bottom: calc(16px + env(safe-area-inset-bottom));
  z-index: 60;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px 5px 5px 14px;
  border-radius: 999px;
  background: rgba(9, 13, 29, 0.85);
  border: 1px solid var(--line-strong);
  backdrop-filter: blur(12px);
  font-size: 12px;
  color: var(--gray);
  transform: translate(-50%, 140%);
  transition: transform 0.4s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.variant.show { transform: translate(-50%, 0); }
.variant span { margin-right: 6px; white-space: nowrap; }
.variant button {
  font: 500 12px var(--ui);
  color: var(--gray);
  background: transparent;
  border: 0;
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
}
.variant button.on { background: var(--nebula); color: var(--cosmos); }
.is-embedded .variant { bottom: 12px; }

@media (max-width: 900px) {
  .areas { padding: 96px var(--gutter) 80px; }
  .areas-head { margin-bottom: 40px; }
  .areas-index { display: none; }
  .area, .area:nth-of-type(even) { grid-template-columns: 1fr; gap: 28px; min-height: 0; padding: 24px 0; }
  .area:nth-of-type(even) .panel { order: 0; }
  .area + .area { margin-top: 48px; }
  .panel { border-radius: 22px; }
  .area-copy p { font-size: 16px; }
  .variant span { display: none; }
  /* el SVG se reduce ~0.55x en mobile: compensar el tamaño de las etiquetas */
  .scene .lbl, .scene .node-lbl { font-size: 17px; letter-spacing: 0.08em; }
}

@media (prefers-reduced-motion: reduce) {
  .blob, .bg.photo img { animation: none; }
}