/* ============================================
   NEUTRALITO — Design System
   Versión 1.0 · Marzo 2026
   Fuentes: Oswald, IBM Plex Sans, IBM Plex Mono
   Google Fonts import:
   https://fonts.googleapis.com/css2?family=Oswald:wght@400;500;600;700&family=IBM+Plex+Sans:wght@300;400;500&family=IBM+Plex+Mono:wght@400;500&display=swap
============================================ */

/* ── VARIABLES ── */
:root {
  --white:        #ffffff;
  --off-white:    #f5f5f2;
  --silver-light: #e8e8e4;
  --silver:       #C0C0C0;
  --silver-dark:  #8a8a8a;
  --black:        #111111;
  --black-soft:   #333333;
  --gold:         #FFD700;
  --gold-dark:    #CC7722;
  --blue:         #2F3A4A;
  --teal:         #1B4D4F;
}

/* ── RESET ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--white);
  color: var(--black);
  font-family: 'IBM Plex Sans', sans-serif;
  font-weight: 300;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── TIPOGRAFÍA ── */

/* Títulos principales — Oswald */
.titulo-principal {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(48px, 9vw, 100px);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--black);
  line-height: 1;
}

/* Títulos de sección — Oswald */
.titulo-seccion {
  font-family: 'Oswald', sans-serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-transform: none;
  color: var(--black);
  margin-bottom: 32px;
}

/* Títulos de página interior — Oswald */
.titulo-pagina {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--black);
  line-height: 1.1;
  margin-bottom: 32px;
}

/* Texto cuerpo — IBM Plex Sans */
.texto {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 15.5px;
  font-weight: 400;
  color: rgba(17,17,17,0.88);
  line-height: 1.85;
  max-width: 660px;
  margin-bottom: 20px;
}

/* Texto secundario / subtítulo */
.texto-secundario {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 15px;
  font-weight: 300;
  color: rgba(17,17,17,0.6);
  line-height: 1.7;
}

/* Etiquetas / monospace — IBM Plex Mono */
.etiqueta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--silver-dark);
}

/* Tagline */
.tagline {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: clamp(13px, 1.5vw, 16px);
  font-weight: 300;
  color: var(--silver-dark);
  letter-spacing: 0.04em;
}

/* ── NAVEGACIÓN ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 300;
  display: flex;
  align-items: stretch;
  height: 60px;
  background: var(--white);
  border-bottom: 1px solid rgba(0,0,0,0.08);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 24px;
  cursor: pointer;
  flex-shrink: 0;
  border-right: 1px solid rgba(0,0,0,0.08);
  text-decoration: none;
}

.nav-brand img { height: 28px; width: auto; object-fit: contain; }

.nav-brand-text {
  font-family: 'Oswald', sans-serif;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--black);
}

.nav-tabs { display: flex; flex: 1; overflow-x: auto; }

.nav-tab {
  display: flex;
  align-items: center;
  padding: 0 24px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--silver-dark);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap;
  user-select: none;
}

.nav-tab:hover { color: var(--black); }
.nav-tab.active { color: var(--black); border-bottom-color: var(--black); }

.nav-social {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 20px;
  border-left: 1px solid rgba(0,0,0,0.08);
  flex-shrink: 0;
}

.nav-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  color: var(--silver-dark);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-social-link:hover { color: var(--black); }
.nav-social-link svg { pointer-events: none; }

/* ── PÁGINAS / TABS ── */
.page { display: none; }
.page.active { display: block; animation: fadeIn 0.25s ease; }

/* ── SECCIONES ── */
.seccion {
  padding: 80px 52px;
  border-top: 1px solid rgba(0,0,0,0.07);
}
.seccion.bg-blanco    { background: var(--white); }
.seccion.bg-gris      { background: var(--off-white); }
.seccion.bg-plateado  { background: var(--silver-light); }
.seccion.bg-negro     { background: var(--black); }

.seccion-inner { max-width: 820px; margin: 0 auto; }
.seccion-inner-wide { max-width: 960px; margin: 0 auto; }
.seccion-inner-narrow { max-width: 660px; margin: 0 auto; }

/* ── DIVISOR ── */
.divisor {
  width: 40px;
  height: 1px;
  background: var(--silver);
  margin-bottom: 36px;
}

/* ── BADGE ── */
.badge {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--silver-dark);
  border: 1px solid rgba(0,0,0,0.1);
  display: inline-block;
  padding: 4px 10px;
  margin-bottom: 28px;
}

/* ── BOTONES ── */
.btn {
  font-family: 'Oswald', sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 13px 32px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: opacity 0.2s, transform 0.15s;
  cursor: pointer;
  border: none;
}
.btn:hover { opacity: 0.85; transform: translateY(-1px); }

.btn-negro  { background: var(--black); color: var(--white); }
.btn-blanco { background: var(--white); color: var(--black); }
.btn-outline {
  background: transparent;
  color: var(--black);
  border: 1.5px solid rgba(0,0,0,0.2);
}
.btn-outline:hover { border-color: var(--black); opacity: 1; }

/* ── TARJETAS ── */
.card {
  background: var(--white);
  border: 1px solid rgba(0,0,0,0.07);
  padding: 28px;
  transition: border-color 0.2s, transform 0.15s;
}
.card:hover {
  border-color: rgba(0,0,0,0.18);
  transform: translateY(-1px);
}

.card-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  max-width: 660px;
}

.card-grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2px;
  background: rgba(0,0,0,0.06);
}

/* ── MANIFIESTO ── */
.manifiesto-frase {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 400;
  line-height: 1.45;
  letter-spacing: 0.03em;
  color: var(--silver);
  margin-bottom: 20px;
}
.manifiesto-frase strong { color: var(--white); font-weight: 600; }

/* ── FOOTER ── */
.footer {
  background: var(--off-white);
  border-top: 1px solid rgba(0,0,0,0.07);
  padding: 40px 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-marca { display: flex; align-items: center; gap: 8px; }
.footer-marca img { height: 22px; opacity: 0.25; }
.footer-marca-text {
  font-family: 'Oswald', sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--silver-dark);
}

.footer-social { display: flex; gap: 20px; align-items: center; }
.social-link {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--silver-dark);
  text-decoration: none;
  transition: color 0.2s;
}
.social-link:hover { color: var(--black); }

/* ── ANIMACIONES ── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .nav-tabs .nav-tab { padding: 0 14px; font-size: 10px; }
  .nav-brand { padding: 0 16px; }
  .seccion { padding-left: 24px; padding-right: 24px; }
  .footer  { padding-left: 24px; padding-right: 24px; flex-direction: column; align-items: flex-start; }
  .card-grid-2 { grid-template-columns: 1fr; }
  .card-grid-3 { grid-template-columns: 1fr; }
}