/* ============================================================
   COMPONENTES COMPARTIDOS — Nav, cursor, botones, reveal, cards
   ============================================================ */

/* ---------- Cursor personalizado ---------- */
.cursor-dot,
.cursor-ring {
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 9999;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  mix-blend-mode: difference;
}
.cursor-dot {
  width: 6px; height: 6px;
  background: #fff;
  transition: opacity 0.2s ease;
}
.cursor-ring {
  width: 32px; height: 32px;
  border: 1.5px solid #fff;
  transition: width 0.25s var(--ease), height 0.25s var(--ease), border-color 0.25s ease, opacity 0.2s ease;
}
.cursor-ring.is-hover {
  width: 56px; height: 56px;
}
@media (hover: none), (pointer: coarse) {
  .cursor-dot, .cursor-ring { display: none; }
}

/* ---------- Nav fija ---------- */
.nav {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.6rem 1.2rem;
  background: rgba(10, 10, 10, 0.78);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 999px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
  max-width: calc(100vw - 2rem);
  overflow-x: auto;
  scrollbar-width: none;
}
.nav::-webkit-scrollbar { display: none; }

.nav__brand {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #fff;
  font-weight: 600;
  white-space: nowrap;
  padding-right: 0.5rem;
  border-right: 1px solid rgba(255,255,255,0.15);
}

.nav__link {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.nav__link:hover,
.nav__link.is-active { color: #fff; }

/* ---------- Botones estándar de proyecto ---------- */
.btn-row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  border: 1px solid currentColor;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s var(--ease), background 0.25s ease, color 0.25s ease;
  background: transparent;
}
.btn:hover { transform: translateY(-2px); }
.btn-demo { background: var(--base-text); color: var(--base-bg); border-color: var(--base-text); }
.btn-demo:hover { opacity: 0.85; }
.btn-repo { color: var(--base-text); }
.btn-repo:hover { background: var(--base-text); color: var(--base-bg); }
.btn-download {
  color: inherit;
  border-radius: 3px;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: transparent;
}
.btn-download:hover {
  background: color-mix(in srgb, currentColor 18%, transparent);
}

/* Trofeo: visualmente como botón pero no clickeable */
.btn-trophy {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  border: 1px dashed currentColor;
  opacity: 0.85;
  cursor: default;
  pointer-events: none;
}

/* ---------- Cards con elevación ---------- */
.card {
  border-radius: var(--radius-md);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
  will-change: transform;
}
.card:hover {
  transform: translateY(-8px);
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal-stagger.is-visible > * { opacity: 1; transform: translateY(0); }

/* ---------- Sección genérica ---------- */
.section {
  padding: var(--space-xl) var(--space-md);
  position: relative;
}
.section__inner {
  max-width: 1100px;
  margin: 0 auto;
}
.section__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.65;
  margin-bottom: 0.6rem;
}
.section__title {
  font-size: var(--fs-h1);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}
.section__lead {
  font-size: var(--fs-body);
  max-width: 640px;
  opacity: 0.8;
  line-height: 1.6;
}

.grid {
  display: grid;
  gap: 1.5rem;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 860px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .nav { gap: 1rem; }
}

/* ---------- Gradient bridge entre secciones ---------- */
.gradient-bridge {
  display: block;
  width: 100%;
  height: 120px;
  margin: 0;
  padding: 0;
  pointer-events: none;
}
.footer {
  background: var(--base-invert-bg);
  color: var(--base-invert-text);
  padding: var(--space-lg) var(--space-md) var(--space-md);
  text-align: center;
}
.footer__socials {
  display: flex;
  justify-content: center;
  gap: 1.2rem;
  margin: 1.5rem 0;
}
.footer__socials a {
  color: #fff;
  opacity: 0.7;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.footer__socials a:hover { opacity: 1; transform: translateY(-3px); }
.footer__note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  opacity: 0.4;
}

/* ---------- Utilidades ---------- */
.ph { display: inline-flex; vertical-align: -2px; }
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}
:focus-visible {
  outline: 2px solid var(--esp32-turquoise);
  outline-offset: 3px;
}