/* ============================================================
   SENDASTRAL — Base (reset + tipografía + utilidades)
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: var(--fs-400);
  line-height: var(--lh-base);
  color: var(--c-text);
  background: var(--c-bg);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; transition: color var(--t-fast) var(--ease); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: var(--lh-tight);
  color: var(--c-purple);
  letter-spacing: .01em;
}
h1 { font-size: var(--fs-900); font-weight: 400; }
h2 { font-size: var(--fs-800); font-weight: 400; }
h3 { font-size: var(--fs-700); }
h4 { font-size: var(--fs-600); }

p { color: var(--c-text); }

::selection { background: var(--c-purple); color: var(--c-warm-white); }

:focus-visible {
  outline: 2px solid var(--c-purple-soft);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ---- Layout helpers ---- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--sp-5); }
.narrow { max-width: var(--container-narrow); }
.section { padding-block: var(--sp-9); }

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--fs-300);
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--c-purple-soft);
  font-weight: 600;
}

.lead { font-size: var(--fs-500); color: var(--c-text-soft); }

/* ---- Botones ---- */
.btn {
  display: inline-flex; align-items: center; gap: .55em;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--fs-400);
  letter-spacing: .02em;
  padding: .85em 1.8em;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--t-fast) var(--ease),
              box-shadow var(--t-base) var(--ease),
              background var(--t-base) var(--ease),
              color var(--t-base) var(--ease);
  will-change: transform;
}
.btn-primary {
  background: linear-gradient(135deg, var(--c-purple), var(--c-purple-soft));
  color: var(--c-warm-white);
  box-shadow: var(--shadow-soft);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow), var(--shadow-soft); }
.btn-ghost {
  background: transparent;
  color: var(--c-purple);
  border-color: var(--c-line);
}
.btn-ghost:hover { border-color: var(--c-purple-soft); color: var(--c-purple-soft); transform: translateY(-2px); }
.btn-lg { font-size: var(--fs-500); padding: 1em 2.4em; letter-spacing: .04em; }

/* ---- Utilidades ---- */
.text-center { text-align: center; }
.muted { color: var(--c-text-soft); }
.divider { height: 1px; background: var(--c-line); border: 0; margin-block: var(--sp-6); }

.grid { display: grid; gap: var(--sp-5); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 880px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---- Scroll reveal (activado por effects.js) ---- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}