/* ============================================
   03-BASE.CSS — Estilos base globales
   ============================================ */

body {
  font-family: var(--f-body);
  font-size: var(--fs-base);
  color: var(--c-white-soft);
  background: #000;  /* fallback si el shader no carga */
  overflow-x: hidden;
}

/* Background animado fixed detrás de todo
   Tonos azul oscuro + navy + glow azul claro siguiendo cursor (--mx/--my). */
.bg-shader {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: var(--z-bg);
  pointer-events: none;
  display: block;
  background:
    /* Glow azul claro siguiendo el cursor */
    radial-gradient(
      circle 600px at var(--mx, 50%) var(--my, 50%),
      rgba(90, 143, 196, 0.22),
      transparent 70%
    ),
    /* Mesh gradient con la nueva paleta */
    radial-gradient(ellipse 100% 80% at 20% 0%,  #11243a, transparent 60%),
    radial-gradient(ellipse 100% 80% at 80% 100%, #0d1b2a, transparent 60%),
    radial-gradient(ellipse 80% 70% at 50% 50%, #152e48, transparent 70%),
    #07111c;
  animation: bg-breathe 18s ease-in-out infinite alternate;
}

@keyframes bg-breathe {
  0%   { filter: brightness(1.0); }
  50%  { filter: brightness(1.04); }
  100% { filter: brightness(1.0); }
}

@media (prefers-reduced-motion: reduce) {
  .bg-shader { animation: none; }
}

/* === HEADER === */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) var(--pad-page);
  background: linear-gradient(to bottom, var(--c-bg-deep) 0%, transparent 100%);
  transition: backdrop-filter var(--dur-base) var(--ease-out);
}

.site-header.is-scrolled {
  backdrop-filter: blur(16px) saturate(160%);
  background: oklch(0.07 0.025 285 / 0.75);
  border-bottom: 1px solid var(--c-border-soft);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  color: var(--c-white);
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
}

.brand__mark {
  width: 22px;
  height: 22px;
  color: var(--c-white);
  filter: drop-shadow(0 0 12px oklch(0.62 0.24 295 / 0.7));
  transition: transform var(--dur-base) var(--ease-spring);
}

.brand:hover .brand__mark { transform: rotate(180deg) scale(1.1); }

.brand__accent {
  color: var(--c-purple-glow);
  font-weight: 700;
}

/* === NAV === */
.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

.nav__menu a {
  position: relative;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  color: var(--c-white-soft);
  padding: var(--sp-2) 0;
  transition: color var(--dur-fast) var(--ease-out);
}

.nav__menu a:not(.nav__cta)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--c-purple-glow);
  transition: width var(--dur-base) var(--ease-out);
}

.nav__menu a:not(.nav__cta):hover { color: var(--c-white); }
.nav__menu a:not(.nav__cta):hover::after { width: 100%; }

.nav__cta {
  padding: var(--sp-2) var(--sp-5) !important;
  border: 1px solid var(--c-border);
  border-radius: var(--r-pill);
  background: oklch(0.62 0.24 295 / 0.08);
  transition: all var(--dur-base) var(--ease-out);
}

.nav__cta:hover {
  background: var(--c-purple);
  border-color: var(--c-purple-glow);
  color: var(--c-white);
  box-shadow: var(--shadow-button);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-2);
  z-index: 60;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--c-white);
  transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-fast);
}

.nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* === BOTONES === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-6);
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  border-radius: var(--r-pill);
  transition: all var(--dur-base) var(--ease-out);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn svg { width: 14px; height: 14px; transition: transform var(--dur-base) var(--ease-out); }
.btn:hover svg { transform: translateX(4px); }

.btn--primary {
  background: var(--g-purple);
  color: var(--c-white);
  box-shadow: var(--shadow-button);
}

.btn--primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--c-purple-glow), var(--c-purple));
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
}

.btn--primary:hover::before { opacity: 1; }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px -6px oklch(0.62 0.24 295 / 0.7); }
.btn--primary span, .btn--primary svg { position: relative; z-index: 1; }

.btn--ghost {
  background: transparent;
  color: var(--c-white-soft);
  border: 1px solid var(--c-border);
}

.btn--ghost:hover {
  background: oklch(0.62 0.24 295 / 0.1);
  border-color: var(--c-purple-glow);
  color: var(--c-white);
}

.btn--full { width: 100%; }

/* === MOBILE === */
@media (max-width: 768px) {
  .nav__toggle { display: flex; }
  .nav__menu {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    gap: var(--sp-6);
    background: oklch(0.07 0.025 285 / 0.97);
    backdrop-filter: blur(24px);
    transform: translateX(100%);
    transition: transform var(--dur-slow) var(--ease-out);
  }
  .nav__menu.is-open { transform: translateX(0); }
  .nav__menu a { font-size: var(--fs-md); }
}