/* ============================================================
   VARTEX 14 — base.css
   Reset, variables de diseño, tipografía, fondo compartido.
   ============================================================ */

/* ---------- Reset básico ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6.5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100svh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.65;
  font-weight: 400;
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
}

img,
svg,
video {
  display: block;
  max-width: 100%;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

/* ---------- Lenis: integración recomendada ---------- */
html.lenis,
html.lenis body {
  height: auto;
}

.lenis.lenis-smooth {
  scroll-behavior: auto !important;
}

.lenis.lenis-smooth [data-lenis-prevent] {
  overscroll-behavior: contain;
}

.lenis.lenis-stopped {
  overflow: hidden;
}

/* ---------- Variables de diseño ---------- */
:root {
  /* Color */
  --bg: #111214;
  --bg-alt: #191a1e;
  --bg-light: rgba(255, 255, 255, 0.03);
  --text: #f6f4ef;
  --text-2: #d6d3cd;
  --text-3: #bcb8b0;
  --accent: #fe8c07;
  --rose: #c8697d;
  --blue: #3994e5;
  --line: rgba(246, 244, 239, 0.1);
  --line-strong: rgba(246, 244, 239, 0.18);

  /* Tipografía */
  --font-serif: "Roboto Slab", Georgia, "Times New Roman", serif;
  --font-sans: "Roboto", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Roboto", ui-monospace, monospace;

  /* Escala fluida */
  --fs-hero: clamp(4.2rem, 15vw, 15rem);
  --fs-title: clamp(2.6rem, 5vw, 5.4rem);
  --fs-sub: clamp(1.2rem, 2.2vw, 1.9rem);
  --fs-body: clamp(1rem, 1.1vw, 1.12rem);
  --fs-small: 0.9rem;
  --fs-mono: clamp(0.82rem, 0.9vw, 0.78rem);

  /* Geometría */
  --header-h: 86px;
  --shell: 1440px;
  --shell-pad: clamp(1.25rem, 4vw, 4.5rem);
  --radius: 18px;
  --radius-lg: 28px;

  /* Ritmo */
  --sec-pad: clamp(6rem, 12vw, 11rem);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-slow: cubic-bezier(0.76, 0, 0.24, 1);
  --dur: 0.9s;
}

/* ---------- Tipografía base ---------- */
h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.015em;
}

em {
  font-style: italic;
  color: var(--text-2);
}

::selection {
  background: rgba(254, 140, 7, 0.85);
  color: #111214;
}

/* ---------- Accesibilidad ---------- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 2px;
}

.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: 200;
  padding: 0.8rem 1.4rem;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: var(--fs-small);
  transition: top 0.3s var(--ease);
}

.skip-link:focus {
  top: 1rem;
}

/* ---------- Fondo compartido: nebulosa animada y luminosa ---------- */
.aurora {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  overflow: hidden;
  background: radial-gradient(
    130% 100% at 50% -10%,
    #2b2d3a 0%,
    #20222d 42%,
    #1a1b25 68%
  );
}

/* Núcleo de nebulosa (nubes de gas).
   Tamaño contenido y blur moderado para mantener bajo el coste de GPU. */
.aurora__layer {
  position: absolute;
  width: 72vmax;
  height: 72vmax;
  border-radius: 50%;
  filter: blur(26px) saturate(2);
  mix-blend-mode: screen;
  will-change: transform, opacity;
}

.aurora__layer--one {
  top: -13vmax;
  left: -8vmax;
  background:
    radial-gradient(circle at 34% 30%, rgba(254, 140, 7, 0.8), transparent 56%),
    radial-gradient(circle at 72% 74%, rgba(254, 140, 7, 0.5), transparent 62%);
  opacity: 0.9;
}

.aurora__layer--two {
  top: -4vmax;
  right: -10vmax;
  background:
    radial-gradient(
      circle at 58% 42%,
      rgba(57, 148, 229, 0.7),
      transparent 58%
    ),
    radial-gradient(
      circle at 28% 82%,
      rgba(200, 105, 125, 0.6),
      transparent 60%
    );
  opacity: 0.88;
}

.aurora__layer--three {
  bottom: -24vmax;
  left: 20%;
  background:
    radial-gradient(
      circle at 48% 42%,
      rgba(200, 105, 125, 0.68),
      transparent 58%
    ),
    radial-gradient(circle at 76% 64%, rgba(254, 140, 7, 0.55), transparent 55%);
  opacity: 0.85;
}

.aurora__layer--four {
  top: 22%;
  left: -22vmax;
  background:
    radial-gradient(
      circle at 42% 38%,
      rgba(57, 148, 229, 0.55),
      transparent 62%
    ),
    radial-gradient(
      circle at 78% 72%,
      rgba(200, 105, 125, 0.5),
      transparent 60%
    );
  opacity: 0.78;
}

/* Vórtice giratorio sutil (materia en espiral) */
.aurora__swirl {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 120vmax;
  height: 120vmax;
  margin: -60vmax 0 0 -60vmax;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    transparent 0deg 42deg,
    rgba(254, 140, 7, 0.16) 92deg,
    transparent 142deg 218deg,
    rgba(57, 148, 229, 0.18) 268deg,
    transparent 318deg 360deg
  );
  filter: blur(24px);
  will-change: transform;
}

/* ---------- Grano de película ---------- */
.grain {
  position: fixed;
  inset: -60%;
  width: 220%;
  height: 220%;
  z-index: 80;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
  background-size: 300px 300px;
}

/* ---------- Barra de desplazamiento sutil ---------- */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: rgba(246, 244, 239, 0.16);
  border-radius: 999px;
  border: 2px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(246, 244, 239, 0.28);
}