/* ============================================================
   LAYOUT.CSS — Estructura Grid/Flexbox, Navbar y Footer
   AirFryer Nutrición Premium © 2024
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;0,900;1,400;1,700&family=Inter:wght@300;400;500;600;700&display=swap');

/* ============================================================
   BARRA DE PROGRESO SUPERIOR
   ============================================================ */

#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-gold), var(--accent-green));
  background-size: 200% 100%;
  z-index: calc(var(--z-navbar) + 2);
  transition: width 80ms linear;
  box-shadow: 0 0 16px var(--accent-green), 0 0 4px var(--accent-gold);
}

/* ============================================================
   NAVBAR
   ============================================================ */

.navbar {
  position: fixed;
  top: 3px;
  left: 0;
  right: 0;
  height: var(--navbar-h);
  display: flex;
  align-items: center;
  z-index: var(--z-navbar);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  background: rgba(13, 15, 14, 0.78);
  border-bottom: 1px solid var(--border-subtle);
  transition:
    background var(--t-slow),
    box-shadow var(--t-slow),
    border-color var(--t-slow);
}

.navbar.scrolled {
  background: rgba(13, 15, 14, 0.96);
  border-bottom-color: var(--border-medium);
  box-shadow: 0 4px 40px rgba(0,0,0,0.6);
}

.navbar__inner {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.navbar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  flex-shrink: 0;
  transition: opacity var(--t-fast);
}

.navbar__brand:hover { opacity: 0.88; }

.navbar__brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-green), var(--accent-green-dark));
  border-radius: var(--radius-md);
  font-size: 1.1rem;
  color: var(--bg-deep);
  font-style: normal;
  box-shadow: var(--shadow-green);
  flex-shrink: 0;
}

.navbar__brand-text span {
  color: var(--accent-green);
}

.navbar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.navbar__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color var(--t-fast);
  position: relative;
  white-space: nowrap;
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-gold));
  border-radius: var(--radius-full);
  transition: width var(--t-base);
}

.navbar__link:hover {
  color: var(--text-primary);
}

.navbar__link:hover::after { width: 100%; }

.navbar__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  background: var(--accent-green);
  color: var(--bg-deep) !important;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  transition:
    background var(--t-fast),
    transform var(--t-fast),
    box-shadow var(--t-fast);
  white-space: nowrap;
}

.navbar__cta:hover {
  background: var(--accent-green-light);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(16, 185, 129, 0.35);
}

.navbar__cta::after { display: none !important; }

.navbar__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: background var(--t-fast);
}

.navbar__toggle:hover { background: var(--border-subtle); }

.navbar__toggle span {
  display: block;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: transform var(--t-base), opacity var(--t-fast), width var(--t-base);
}

.navbar__toggle span:nth-child(1) { width: 22px; }
.navbar__toggle span:nth-child(2) { width: 16px; }
.navbar__toggle span:nth-child(3) { width: 20px; }

.navbar__toggle.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
  width: 22px;
}
.navbar__toggle.open span:nth-child(2) { opacity: 0; width: 0; }
.navbar__toggle.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
  width: 22px;
}

/* ============================================================
   CONTENEDOR PRINCIPAL
   ============================================================ */

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-8);
  width: 100%;
}

.container--wide { max-width: var(--container-wide); }
.container--prose { max-width: var(--container-prose); }

/* ============================================================
   SECCIONES
   ============================================================ */

.section {
  padding: var(--space-32) 0;
  position: relative;
}

.section--sm  { padding: var(--space-24) 0; }
.section--lg  { padding: calc(var(--space-32) * 1.4) 0; }
.section--top { padding-top: calc(var(--navbar-h) + var(--space-32)); }

.section__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-green);
  margin-bottom: var(--space-5);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-full);
  background: var(--accent-green-glow);
}

.section__title {
  font-family: var(--font-serif);
  font-size: var(--text-5xl);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: var(--space-5);
  letter-spacing: -0.025em;
}

.section__title em {
  font-style: italic;
  color: var(--accent-gold);
}

.section__subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.75;
}

/* ============================================================
   HERO
   ============================================================ */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-top: var(--navbar-h);
  position: relative;
  overflow: hidden;
}

.hero__bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
  opacity: 0.18;
  filter: saturate(0.7);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 90% 70% at 50% -5%, rgba(16, 185, 129, 0.13) 0%, transparent 65%),
    radial-gradient(ellipse 70% 50% at 85% 85%, rgba(245, 158, 11, 0.09) 0%, transparent 55%),
    radial-gradient(ellipse 50% 40% at 10% 70%, rgba(16, 185, 129, 0.06) 0%, transparent 50%);
  z-index: 0;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(16, 185, 129, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 185, 129, 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: var(--z-raised);
  text-align: center;
  padding: var(--space-16) var(--space-8);
  max-width: 860px;
  margin: 0 auto;
  width: 100%;
}

.hero__scroll-hint {
  position: absolute;
  bottom: var(--space-10);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-raised);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  animation: scrollBounce 2s ease-in-out infinite;
}

/* ============================================================
   SEPARADOR DECORATIVO
   ============================================================ */

.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-accent), transparent);
  margin: var(--space-16) 0;
}

.divider--gold {
  background: linear-gradient(90deg, transparent, var(--border-gold), transparent);
}

/* ============================================================
   FOOTER
   ============================================================ */

.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-20) 0 var(--space-12);
}

.footer__inner {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr;
  gap: var(--space-16);
  padding-bottom: var(--space-12);
  margin-bottom: var(--space-10);
  border-bottom: 1px solid var(--border-subtle);
}

.footer__brand-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-5);
}

.footer__brand-logo span { color: var(--accent-green); }

.footer__brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-green), var(--accent-green-dark));
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--bg-deep);
  font-style: normal;
}

.footer__brand p {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 300px;
  margin-bottom: var(--space-6);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 1rem;
  transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
}

.footer__social-link:hover {
  border-color: var(--border-accent);
  color: var(--accent-green);
  background: var(--accent-green-glow);
}

.footer__col-title {
  font-family: var(--font-serif);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-5);
  letter-spacing: 0.01em;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__links a {
  font-size: var(--text-sm);
  color: var(--text-muted);
  transition: color var(--t-fast), padding-left var(--t-fast);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer__links a:hover {
  color: var(--accent-green);
  padding-left: var(--space-1);
}

.footer__bottom {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.footer__copy {
  font-size: var(--text-xs);
  color: var(--text-disabled);
  line-height: 1.6;
}

.footer__copy strong {
  color: var(--text-muted);
  font-weight: 500;
}

.footer__disclaimer {
  font-size: var(--text-xs);
  color: var(--text-disabled);
  line-height: 1.6;
  max-width: 480px;
  text-align: right;
}

/* ============================================================
   GRIDS REUTILIZABLES
   ============================================================ */

.grid-recipes {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-8);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

/* ============================================================
   RECIPE PAGE — Layout editorial
   ============================================================ */

.recipe-page {
  padding-top: var(--navbar-h);
}

.recipe-hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--bg-elevated);
}

.recipe-hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 50% 30%, rgba(16, 185, 129, 0.1) 0%, transparent 60%),
    linear-gradient(180deg, rgba(13,15,14,0.2) 0%, rgba(13,15,14,0.85) 70%, var(--bg-deep) 100%),
    var(--bg-elevated);
  z-index: 1;
}

.recipe-hero__image-placeholder {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(16, 185, 129, 0.08) 0%,
    rgba(245, 158, 11, 0.06) 50%,
    rgba(16, 185, 129, 0.04) 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 8rem;
  opacity: 0.12;
}

.recipe-hero__content {
  position: relative;
  z-index: 2;
  width: 100%;
  padding: var(--space-20) var(--space-8) var(--space-16);
  max-width: var(--container-max);
  margin: 0 auto;
}

.recipe-body {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.recipe-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: var(--space-12);
  align-items: start;
  padding: var(--space-16) 0 var(--space-32);
}

.recipe-sidebar {
  position: sticky;
  top: calc(var(--navbar-h) + var(--space-8));
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1024px) {
  .footer__inner { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }

  .recipe-layout {
    grid-template-columns: 1fr;
  }
  .recipe-sidebar { position: static; }
}

@media (max-width: 768px) {
  .navbar__nav {
    display: none;
    position: fixed;
    top: calc(var(--navbar-h) + 3px);
    left: 0;
    right: 0;
    background: rgba(13, 15, 14, 0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column;
    padding: var(--space-8) var(--space-8) var(--space-12);
    gap: var(--space-6);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
  }

  .navbar__nav.open { display: flex; }

  .navbar__link {
    font-size: var(--text-base);
    padding: var(--space-2) 0;
    width: 100%;
  }

  .navbar__cta {
    width: 100%;
    justify-content: center;
    padding: var(--space-3) var(--space-5);
  }

  .navbar__toggle { display: flex; }

  .grid-recipes { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }

  .footer__inner { grid-template-columns: 1fr; gap: var(--space-10); }
  .footer__disclaimer { text-align: left; }
  .footer__bottom { flex-direction: column; }

  .section__title { font-size: var(--text-4xl); }
  .section { padding: var(--space-20) 0; }

  .recipe-hero { min-height: 55vh; }
  .recipe-body { padding: 0 var(--space-5); }
  .recipe-layout { padding: var(--space-10) 0 var(--space-20); gap: var(--space-10); }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-5); }
  .navbar__inner { padding: 0 var(--space-5); }
  .hero__content { padding: var(--space-10) var(--space-5); }
  .grid-3 { grid-template-columns: 1fr; }
  .section__title { font-size: var(--text-3xl); }
}