/* ===================================================
   KÉFIR PRO — Estilos Principales
   Feria de Ciencias 2025
   =================================================== */

/* ---- RESET & BASE ---- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Paleta de colores */
  --green-50: #f0fdf4;
  --green-100: #dcfce7;
  --green-200: #bbf7d0;
  --green-300: #86efac;
  --green-400: #4ade80;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --green-700: #15803d;
  --green-800: #166534;
  --green-900: #14532d;

  --blue-50: #eff6ff;
  --blue-100: #dbeafe;
  --blue-200: #bfdbfe;
  --blue-300: #93c5fd;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;

  --teal-400: #2dd4bf;
  --teal-500: #14b8a6;
  --teal-600: #0d9488;

  --neutral-50: #f9fafb;
  --neutral-100: #f3f4f6;
  --neutral-200: #e5e7eb;
  --neutral-300: #d1d5db;
  --neutral-400: #9ca3af;
  --neutral-500: #6b7280;
  --neutral-600: #4b5563;
  --neutral-700: #374151;
  --neutral-800: #1f2937;
  --neutral-900: #111827;

  /* Gradientes */
  --gradient-primary: linear-gradient(135deg, #16a34a 0%, #0d9488 50%, #2563eb 100%);
  --gradient-hero: linear-gradient(135deg, rgba(15, 80, 40, 0.92) 0%, rgba(13, 148, 136, 0.85) 50%, rgba(37, 99, 235, 0.80) 100%);
  --gradient-card: linear-gradient(135deg, #f0fdf4 0%, #eff6ff 100%);
  --gradient-alt: linear-gradient(135deg, #f8fafc 0%, #ecfdf5 60%, #eff6ff 100%);

  /* Tipografía */
  --font-body: 'Inter', sans-serif;
  --font-heading: 'Outfit', sans-serif;

  /* Espaciado */
  --section-py: 6rem;
  --container-max: 1200px;
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  --radius-full: 9999px;

  /* Sombras */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, .10), 0 2px 6px rgba(0, 0, 0, .06);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, .12), 0 4px 12px rgba(0, 0, 0, .08);
  --shadow-xl: 0 25px 60px rgba(0, 0, 0, .15);
  --shadow-green: 0 8px 32px rgba(22, 163, 74, .25);
  --shadow-blue: 0 8px 32px rgba(37, 99, 235, .20);

  /* Transiciones */
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--neutral-700);
  background: #fff;
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul,
ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* ---- UTILITY ---- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: var(--section-py) 0;
}

.section-alt {
  background: var(--gradient-alt);
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-tag {
  display: inline-block;
  background: var(--gradient-primary);
  color: #fff;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.35rem 1.1rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--neutral-900);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--neutral-500);
  max-width: 600px;
  margin: 0 auto;
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-full);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.15);
  opacity: 0;
  transition: var(--transition);
}

.btn:hover::after {
  opacity: 1;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-green);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(22, 163, 74, .35);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: #fff;
  transform: translateY(-2px);
}

.btn-product {
  background: var(--gradient-primary);
  color: #fff;
  width: 100%;
  justify-content: center;
  box-shadow: var(--shadow-green);
  font-size: 0.95rem;
  padding: 0.75rem 1.5rem;
}

.btn-product:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(22, 163, 74, .35);
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* ---- NAVBAR ---- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
  padding: 0.6rem 0;
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
  transition: var(--transition);
}

.navbar.scrolled .nav-logo {
  color: var(--neutral-900);
}

.logo-icon {
  font-size: 1.8rem;
}

.logo-accent {
  color: var(--green-400);
}

.navbar.scrolled .logo-accent {
  color: var(--green-600);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: flex-end;

}

.nav-link {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.9);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-full);
  transition: var(--transition);
  white-space: nowrap;
}

.navbar.scrolled .nav-link {
  color: var(--neutral-700);
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.navbar.scrolled .nav-link:hover {
  background: var(--green-50);
  color: var(--green-700);
}

.nav-cta {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #fff !important;
}

.navbar.scrolled .nav-cta {
  background: var(--gradient-primary);
  border: none;
  color: #fff !important;
}

.nav-cta:hover {
  background: rgba(255, 255, 255, 0.3) !important;
}

.navbar.scrolled .nav-cta:hover {
  opacity: 0.9;
  background: var(--gradient-primary) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

.navbar.scrolled .nav-toggle span {
  background: var(--neutral-700);
}

/* ---- HERO ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
}

.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  animation: float-particle linear infinite;
}

@keyframes float-particle {
  0% {
    transform: translateY(100vh) scale(0);
    opacity: 0;
  }

  10% {
    opacity: 1;
  }

  90% {
    opacity: 1;
  }

  100% {
    transform: translateY(-20vh) scale(1);
    opacity: 0;
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  padding: 5rem 1.5rem 2rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
  animation: fade-down 0.8s ease both;
}

.badge-icon {
  font-size: 1rem;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  animation: fade-up 0.9s ease 0.2s both;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero-highlight {
  background: linear-gradient(135deg, #4ade80, #2dd4bf);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: rgba(255, 255, 255, 0.85);
  max-width: 700px;
  margin: 0 auto 1.75rem;
  line-height: 1.7;
  animation: fade-up 0.9s ease 0.4s both;
}

/* ---- HERO INSTITUCIONAL ---- */
.hero-institutional {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  background: rgba(255, 255, 255, 0.10);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius-xl);
  padding: 0.9rem 1.5rem;
  margin-bottom: 1.75rem;
  animation: fade-up 0.9s ease 0.45s both;
}

.inst-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1.25rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
}

.inst-item i {
  color: #4ade80;
  font-size: 0.9rem;
}

.inst-divider {
  width: 1px;
  height: 28px;
  background: rgba(255, 255, 255, 0.25);
}

/* ---- TARJETA ORIGEN ---- */
.origen-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: linear-gradient(135deg, #f0fdf4 0%, #eff6ff 100%);
  border: 1px solid var(--green-200);
  border-left: 5px solid var(--green-500);
  border-radius: var(--radius-xl);
  padding: 1.75rem 2rem;
  margin-bottom: 3rem;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition), box-shadow var(--transition);
}

.origen-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.origen-icon {
  font-size: 3rem;
  flex-shrink: 0;
}

.origen-text p {
  font-size: 1rem;
  color: var(--neutral-700);
  line-height: 1.7;
  margin-bottom: 0.5rem;
}

.origen-text p:last-child {
  margin-bottom: 0;
}

/* ---- OBJETIVO DEL PROYECTO ---- */
.objetivo-card {
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  padding: 3rem 2.5rem;
  text-align: center;
  box-shadow: var(--shadow-green);
  max-width: 860px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.objetivo-card::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.07);
}

.objetivo-card::after {
  content: '';
  position: absolute;
  bottom: -40px;
  left: -40px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.07);
}

.objetivo-icon {
  font-size: 3.5rem;
  margin-bottom: 1.25rem;
  display: block;
  animation: bounce-soft 3s ease infinite;
}

@keyframes bounce-soft {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-8px);
  }
}

.objetivo-text {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.95);
  line-height: 1.8;
  margin-bottom: 1.75rem;
  position: relative;
  z-index: 1;
}

.objetivo-text strong {
  color: #fff;
}

.objetivo-pills {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.objetivo-pills span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-full);
  backdrop-filter: blur(6px);
  transition: background var(--transition);
}

.objetivo-pills span:hover {
  background: rgba(255, 255, 255, 0.28);
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-xl);
  padding: 1.25rem 2rem;
  margin-bottom: 2.5rem;
  animation: fade-up 0.9s ease 0.5s both;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 2rem;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: #4ade80;
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.75);
  margin-top: 0.25rem;
  text-align: center;
}

.stat-divider {
  width: 1px;
  height: 50px;
  background: rgba(255, 255, 255, 0.25);
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 3rem;
  animation: fade-up 0.9s ease 0.6s both;
}

.hero-scroll {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.85rem;
  animation: fade-up 0.9s ease 0.8s both;
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid rgba(255, 255, 255, 0.7);
  border-bottom: 2px solid rgba(255, 255, 255, 0.7);
  transform: rotate(45deg);
  animation: bounce 2s ease infinite;
}

@keyframes bounce {

  0%,
  100% {
    transform: rotate(45deg) translateY(0);
  }

  50% {
    transform: rotate(45deg) translateY(6px);
  }
}

/* ---- ANIMATIONS ---- */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-down {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes zoom-in {
  from {
    opacity: 0;
    transform: scale(0.9);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-animate="fade-right"] {
  transform: translateX(-40px);
}

[data-animate="fade-left"] {
  transform: translateX(40px);
}

[data-animate="zoom-in"] {
  transform: scale(0.9);
}

[data-animate].animated {
  opacity: 1 !important;
  transform: none !important;
}

/* ---- QUÉ ES EL KÉFIR ---- */
.kefir-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.kefir-description {
  font-size: 1.05rem;
  color: var(--neutral-600);
  line-height: 1.8;
  margin-bottom: 1.25rem;
}

.kefir-compounds h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--neutral-800);
  margin-bottom: 1rem;
  margin-top: 1.5rem;
}

.compound-bars {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.compound-item {
  display: grid;
  grid-template-columns: 120px 1fr 80px;
  align-items: center;
  gap: 0.75rem;
}

.compound-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--neutral-700);
}

.compound-bar {
  height: 8px;
  background: var(--neutral-100);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.compound-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--bar-color, var(--green-500));
  width: 0;
  transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.compound-pct {
  font-size: 0.8rem;
  color: var(--neutral-500);
  text-align: right;
}

.kefir-image-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  margin-bottom: 1.5rem;
  aspect-ratio: 4/3;
}

.kefir-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.kefir-image-card:hover .kefir-img {
  transform: scale(1.05);
}

.kefir-img-badge {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--green-700);
  box-shadow: var(--shadow-md);
}

/* Comparison Table */
.comparison-card {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  border: 1px solid var(--neutral-100);
}

.comparison-title {
  background: var(--gradient-primary);
  color: #fff;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.comparison-header {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  padding: 0.75rem 1.5rem;
  background: var(--green-50);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--neutral-700);
}

.highlight-kefir {
  color: var(--green-700);
}

.comparison-row {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  padding: 0.7rem 1.5rem;
  border-top: 1px solid var(--neutral-100);
  font-size: 0.9rem;
  transition: background var(--transition);
}

.comparison-row:hover {
  background: var(--green-50);
}

.kefir-val {
  color: var(--green-600);
  font-weight: 600;
}

/* ---- HISTORIA ---- */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 48px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gradient-primary);
}

.timeline-item {
  display: flex;
  gap: 2rem;
  margin-bottom: 3rem;
  position: relative;
}

.timeline-icon {
  width: 56px;
  height: 56px;
  min-width: 56px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  box-shadow: var(--shadow-green);
  position: relative;
  z-index: 1;
}

.timeline-content {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--neutral-100);
  flex: 1;
  transition: transform var(--transition), box-shadow var(--transition);
}

.timeline-content:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.timeline-date {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--green-600);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.4rem;
}

.timeline-content h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--neutral-900);
  margin-bottom: 0.6rem;
}

.timeline-content p {
  font-size: 0.95rem;
  color: var(--neutral-600);
  line-height: 1.7;
}

/* ---- BENEFICIOS ---- */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.benefit-card {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--neutral-100);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.benefit-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.benefit-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.benefit-card:hover::before {
  transform: scaleX(1);
}

.benefit-card-featured {
  background: var(--gradient-primary);
  color: #fff;
}

.benefit-card-featured h3,
.benefit-card-featured p {
  color: #fff;
}

.benefit-icon-wrap {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--icon-color) 15%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--icon-color);
  margin-bottom: 1.25rem;
  transition: transform var(--transition);
}

.benefit-card:hover .benefit-icon-wrap {
  transform: scale(1.1) rotate(-5deg);
}

.benefit-card-featured .benefit-icon-wrap {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.benefit-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--neutral-900);
  margin-bottom: 0.75rem;
}

.benefit-card p {
  font-size: 0.95rem;
  color: var(--neutral-600);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.benefit-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  background: var(--green-50);
  color: var(--green-700);
  border: 1px solid var(--green-200);
}

.benefit-card-featured .benefit-tag {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.3);
}

/* ---- PROCESO ---- */
.process-timeline {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.process-step {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 1.5rem;
  align-items: start;
  position: relative;
}

.process-step:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 29px;
  top: 60px;
  bottom: -3rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--green-400), var(--teal-400));
}

.process-step-num {
  width: 60px;
  height: 60px;
  min-width: 60px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  box-shadow: var(--shadow-green);
  position: relative;
  z-index: 1;
}

.process-step-content {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 2rem;
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--neutral-100);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.process-step-content:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-lg);
}

.process-img-wrap {
  aspect-ratio: 4/3;
  overflow: hidden;
}

.process-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.process-step-content:hover .process-img-wrap img {
  transform: scale(1.08);
}

.process-img-placeholder {
  background: var(--gradient-alt);
  display: flex;
  align-items: center;
  justify-content: center;
}

.process-icon-large {
  font-size: 4rem;
}

.process-info {
  padding: 1.75rem 1.75rem 1.75rem 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.75rem;
}

.process-info h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--neutral-900);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.process-info h3 i {
  color: var(--green-600);
}

.process-info p {
  font-size: 0.95rem;
  color: var(--neutral-600);
  line-height: 1.7;
}

.process-detail {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.process-detail span {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--green-600);
  background: var(--green-50);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
}

.process-detail i {
  color: var(--green-500);
}

/* ---- PRODUCTOS ---- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.product-card {
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--neutral-100);
  overflow: hidden;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}

.product-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.product-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 2;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-green);
}

.product-badge-cool {
  background: linear-gradient(135deg, #0ea5e9, #2dd4bf);
}

.product-badge-natural {
  background: linear-gradient(135deg, #16a34a, #65a30d);
}

.product-img-wrap {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.product-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-img {
  transform: scale(1.08);
}

.product-overlay {
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  opacity: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition);
}

.product-overlay p {
  color: #fff;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  text-align: center;
}

.product-card:hover .product-overlay {
  opacity: 0.8;
}

.product-body {
  padding: 1.75rem;
}

.product-name {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--neutral-900);
  margin-bottom: 0.6rem;
}

.product-desc {
  font-size: 0.9rem;
  color: var(--neutral-500);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.product-benefits {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.product-benefits li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--neutral-600);
}

.product-benefits i {
  color: var(--green-500);
  font-size: 0.75rem;
  width: 16px;
  flex-shrink: 0;
}

.product-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
  background: var(--green-50);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
}

.price-label {
  font-size: 0.85rem;
  color: var(--neutral-500);
}

.product-price {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--green-700);
  cursor: text;
  border-bottom: 2px dashed var(--green-300);
  min-width: 60px;
  outline: none;
  transition: border-color var(--transition);
}

.product-price:focus {
  border-color: var(--green-600);
  background: var(--green-100);
  border-radius: var(--radius-sm);
  padding: 0 0.25rem;
}

.price-unit {
  font-size: 0.85rem;
  color: var(--neutral-400);
}

/* ---- ¿POR QUÉ? ---- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.why-card {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--neutral-100);
  transition: transform var(--transition), box-shadow var(--transition);
}

.why-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.why-card-featured {
  background: var(--gradient-primary);
}

.why-card-featured h3,
.why-card-featured p {
  color: #fff;
}

.why-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
  transition: transform var(--transition);
}

.why-card:hover .why-icon {
  transform: scale(1.2) rotate(5deg);
}

.why-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--neutral-900);
  margin-bottom: 0.6rem;
}

.why-card p {
  font-size: 0.92rem;
  color: var(--neutral-600);
  line-height: 1.6;
}

/* ---- EXPERIMENTO ---- */
.experiment-container {
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--neutral-100);
}

.experiment-tabs {
  display: flex;
  background: var(--neutral-50);
  border-bottom: 2px solid var(--neutral-200);
  overflow-x: auto;
  scrollbar-width: none;
}

.experiment-tabs::-webkit-scrollbar {
  display: none;
}

.exp-tab {
  flex: 1;
  padding: 1rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--neutral-500);
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
  transition: var(--transition);
}

.exp-tab:hover {
  color: var(--green-600);
  background: var(--green-50);
}

.exp-tab.active {
  color: var(--green-700);
  border-bottom-color: var(--green-600);
  background: #fff;
}

.experiment-content {
  padding: 2.5rem;
}

.exp-panel {
  display: none;
}

.exp-panel.active {
  display: block;
  animation: fade-in 0.4s ease;
}

.exp-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.exp-panel h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--neutral-900);
  margin-bottom: 1rem;
}

.exp-panel h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--neutral-800);
  margin: 1.5rem 0 0.75rem;
}

.exp-panel p {
  font-size: 1rem;
  color: var(--neutral-600);
  line-height: 1.8;
}

.exp-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.exp-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--neutral-600);
  line-height: 1.5;
}

.exp-list li::before {
  content: '✓';
  color: var(--green-600);
  font-weight: 700;
  flex-shrink: 0;
}

.hypothesis-box {
  background: linear-gradient(135deg, var(--green-50), var(--blue-50));
  border-left: 4px solid var(--green-500);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 1rem 0;
}

.hypothesis-text {
  font-style: italic;
  font-size: 1rem;
  color: var(--neutral-700);
  line-height: 1.8;
}

.variables-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}

.variable-card {
  background: var(--gradient-alt);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  border: 1px solid var(--neutral-200);
}

.variable-card h5 {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--neutral-800);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.variable-card p {
  font-size: 0.88rem;
  color: var(--neutral-600);
}

.materials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 1rem;
}

.material-group {
  background: var(--gradient-alt);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  border: 1px solid var(--neutral-200);
}

.material-group h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--neutral-800);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.material-group .exp-list li {
  font-size: 0.88rem;
}

.procedure-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  counter-reset: none;
}

.procedure-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: var(--gradient-alt);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  border: 1px solid var(--neutral-200);
  transition: transform var(--transition);
}

.procedure-list li:hover {
  transform: translateX(8px);
}

.proc-num {
  width: 32px;
  height: 32px;
  min-width: 32px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
}

.procedure-list li div {
  font-size: 0.95rem;
  color: var(--neutral-600);
  line-height: 1.6;
}

.results-grid {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.result-item {
  text-align: center;
  flex: 1;
  min-width: 160px;
}

.result-meter {
  position: relative;
  width: 140px;
  margin: 0 auto 0.75rem;
}

.result-meter svg {
  width: 100%;
}

.result-value {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--neutral-900);
}

.result-item p {
  font-size: 0.9rem;
  color: var(--neutral-600);
}

.conclusion-box {
  background: linear-gradient(135deg, var(--green-50), var(--blue-50));
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid var(--green-200);
}

.conclusion-box h4 {
  margin-top: 0;
  color: var(--green-700);
}

.conclusion-box p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* ---- GALERÍA ---- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 1rem;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 1;
  box-shadow: var(--shadow-md);
}

.gallery-item-large {
  grid-column: span 2;
  aspect-ratio: 16/9;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover img {
  transform: scale(1.08);
}

.gallery-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.75) 0%, transparent 100%);
  color: #fff;
  padding: 1.5rem 1rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  transform: translateY(100%);
  transition: transform var(--transition);
}

.gallery-item:hover .gallery-caption {
  transform: translateY(0);
}

/* ---- FAQ ---- */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--neutral-200);
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.faq-item:hover {
  box-shadow: var(--shadow-md);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--neutral-800);
  text-align: left;
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--green-700);
}

.faq-question[aria-expanded="true"] {
  color: var(--green-700);
}

.faq-question i {
  font-size: 0.85rem;
  color: var(--green-500);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.faq-question[aria-expanded="true"] i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-answer p {
  padding: 0 1.5rem 1.25rem;
  font-size: 0.95rem;
  color: var(--neutral-600);
  line-height: 1.8;
}

/* ---- CONTACTO ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
  align-items: start;
}

.contact-card {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--neutral-100);
  margin-bottom: 1rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

.contact-card:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-lg);
}

.contact-icon {
  width: 50px;
  height: 50px;
  min-width: 50px;
  background: #25D366;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.4rem;
}

.contact-icon-mail {
  background: var(--blue-600);
}

.contact-icon-school {
  background: var(--gradient-primary);
}

.contact-card h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--neutral-900);
  margin-bottom: 0.25rem;
}

.contact-card p {
  font-size: 0.9rem;
  color: var(--neutral-500);
  margin-bottom: 0.5rem;
}

.contact-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--green-600);
  transition: color var(--transition);
}

.contact-link:hover {
  color: var(--green-800);
}

/* Form */
.contact-form-wrap {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--neutral-100);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--neutral-700);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 2px solid var(--neutral-200);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--neutral-800);
  background: var(--neutral-50);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--green-400);
  box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.2);
  background: #fff;
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-success {
  display: none;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  background: var(--green-50);
  border: 1px solid var(--green-200);
  border-radius: var(--radius-md);
  color: var(--green-700);
  font-size: 0.95rem;
  font-weight: 600;
}

.form-success.show {
  display: flex;
  animation: fade-in 0.4s ease;
}

/* ---- EQUIPO ---- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.team-card {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--neutral-100);
  transition: transform var(--transition), box-shadow var(--transition);
}

.team-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.team-card-leader {
  border: 2px solid var(--green-500);
  background: linear-gradient(to bottom, #f0fdf4, #ffffff);
  transform: scale(1.02);
}

.team-card-leader:hover {
  transform: scale(1.02) translateY(-8px);
}

.team-card-leader .team-name {
  color: var(--green-700);
  font-size: 1.2rem;
}

.team-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  margin: 0 auto 1.25rem;
  position: relative;
}

.team-avatar-2 {
  background: linear-gradient(135deg, #2563eb, #7c3aed);
}

.team-avatar-3 {
  background: linear-gradient(135deg, #0d9488, #16a34a);
}

.team-avatar-4 {
  background: linear-gradient(135deg, #ea580c, #dc2626);
}

.team-avatar-ring {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 3px solid transparent;
  background: var(--gradient-primary) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  animation: spin 8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.team-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--neutral-900);
  margin-bottom: 0.25rem;
}

.team-role {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--green-600);
  margin-bottom: 0.6rem;
}

.team-desc {
  font-size: 0.87rem;
  color: var(--neutral-500);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.team-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  justify-content: center;
}

.team-tags span {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: var(--green-50);
  color: var(--green-700);
  border: 1px solid var(--green-200);
}

.advisor-card {
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  padding: 1.75rem 2rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: #fff;
  box-shadow: var(--shadow-green);
}

.advisor-icon {
  font-size: 3rem;
}

.advisor-card h3 {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0.85;
  margin-bottom: 0.25rem;
}

.advisor-name {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.advisor-card p:last-child {
  font-size: 0.9rem;
  opacity: 0.8;
}

/* ---- FOOTER ---- */
.footer-top {
  background: var(--neutral-900);
  color: var(--neutral-300);
  padding: 4rem 0 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.footer-social {
  display: flex;
  gap: 0.75rem;
}

.social-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neutral-300);
  font-size: 1rem;
  transition: var(--transition);
}

.social-btn:hover {
  background: var(--green-600);
  color: #fff;
  transform: translateY(-3px);
}

.footer-links h4 {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--neutral-400);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--green-400);
}

.footer-contact h4 {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
  color: var(--neutral-400);
}

.footer-contact-item i {
  color: var(--green-400);
  width: 16px;
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-contact-item a {
  color: var(--neutral-400);
  transition: color var(--transition);
}

.footer-contact-item a:hover {
  color: var(--green-400);
}

.footer-bottom {
  background: var(--neutral-950, #080f0a);
  padding: 1.25rem 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--neutral-500);
  margin-bottom: 0.25rem;
}

/* ---- WHATSAPP FLOAT ---- */
.whatsapp-float {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 999;
  width: 60px;
  height: 60px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.8rem;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.5);
  transition: transform var(--transition), box-shadow var(--transition);
}

.whatsapp-float:hover {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 8px 30px rgba(37, 211, 102, 0.6);
}

.whatsapp-tooltip {
  position: absolute;
  right: 70px;
  background: var(--neutral-900);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-md);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.whatsapp-tooltip::after {
  content: '';
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
  border: 6px solid transparent;
  border-left-color: var(--neutral-900);
  border-right: none;
}

.whatsapp-float:hover .whatsapp-tooltip {
  opacity: 1;
}

.whatsapp-pulse {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: #25D366;
  animation: pulse-wa 2s ease infinite;
}

@keyframes pulse-wa {
  0% {
    transform: scale(1);
    opacity: 0.6;
  }

  100% {
    transform: scale(1.8);
    opacity: 0;
  }
}

/* ---- BACK TO TOP ---- */
.back-to-top {
  position: fixed;
  bottom: 6.5rem;
  right: 2rem;
  z-index: 999;
  width: 46px;
  height: 46px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1rem;
  box-shadow: var(--shadow-green);
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
  transition: var(--transition);
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  .kefir-intro-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .benefits-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .variables-grid,
  .materials-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --section-py: 4rem;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 280px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    padding: 5rem 1.5rem 2rem;
    gap: 0.5rem;
    box-shadow: var(--shadow-xl);
    transform: translateX(100%);
    transition: transform var(--transition);
  }

  .nav-menu.open {
    transform: translateX(0);
  }

  .nav-link {
    color: var(--neutral-700) !important;
    width: 100%;
    padding: 0.75rem 1rem;
  }

  .nav-link:hover {
    background: var(--green-50) !important;
    color: var(--green-700) !important;
  }

  .nav-cta {
    background: var(--gradient-primary) !important;
    border: none !important;
    width: 100%;
    text-align: center;
    color: #fff !important;
  }

  .nav-toggle {
    display: flex;
    position: relative;
    z-index: 1010;
  }

  .nav-toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero-stats {
    flex-direction: column;
    gap: 1rem;
    padding: 1.25rem;
  }

  .stat-divider {
    width: 60px;
    height: 1px;
  }

  .stat-item {
    padding: 0;
  }

  .process-step {
    grid-template-columns: 1fr;
  }

  .process-step::after {
    display: none;
  }

  .process-step-content {
    grid-template-columns: 1fr;
  }

  .process-img-wrap {
    aspect-ratio: 16/9;
  }

  .process-info {
    padding: 1.25rem;
  }

  .timeline::before {
    left: 27px;
  }

  .timeline-icon {
    width: 36px;
    height: 36px;
    min-width: 36px;
    font-size: 0.9rem;
  }

  .products-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .benefits-grid {
    grid-template-columns: 1fr;
  }

  .why-grid {
    grid-template-columns: 1fr;
  }

  .team-grid {
    grid-template-columns: 1fr 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .gallery-grid {
    grid-template-columns: 1fr 1fr;
  }

  .gallery-item-large {
    grid-column: span 2;
    aspect-ratio: 16/9;
  }

  .compound-item {
    grid-template-columns: 90px 1fr 70px;
  }

  .experiment-tabs {
    flex-wrap: nowrap;
  }

  .exp-tab {
    min-width: 120px;
  }

  .advisor-card {
    flex-direction: column;
    text-align: center;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-buttons .btn {
    width: 100%;
    max-width: 320px;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .team-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .gallery-item-large {
    grid-column: span 1;
  }

  .stat-number {
    font-size: 1.5rem;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .comparison-row {
    grid-template-columns: 1fr 1fr 1fr;
    font-size: 0.8rem;
  }

  .comparison-header {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

/* ---- LIGHTBOX ---- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  animation: fade-in 0.3s ease;
}

.lightbox.open {
  display: flex;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  color: #fff;
  font-size: 1.5rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
  cursor: pointer;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--neutral-100);
}

::-webkit-scrollbar-thumb {
  background: var(--green-400);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--green-600);
}

/* ---- SELECTION ---- */
::selection {
  background: var(--green-200);
  color: var(--green-900);
}

/* ---- LOGOS ---- */
.nav-logo-img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--green-500);
  margin-right: 0.35rem;
}

.footer-logo-img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--green-500);
  margin-right: 0.35rem;
}

.inst-logo {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  margin-right: 0.5rem;
  border: 2px solid rgba(255, 255, 255, 0.4);
}

.advisor-logo {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: var(--shadow-md);
  flex-shrink: 0;
}