/* ==========================================================================
   VIDA MÁS LIGERA - DARK NEON WELLNESS DESIGN SYSTEM
   ========================================================================== */

:root {
  --bg-primary: #070A0D;
  --bg-secondary: #0D1217;
  --bg-card: #111820;
  --bg-card-hover: #16202b;
  --text-primary: #F2F5F4;
  --text-secondary: #89969A;
  --text-muted: #536267;
  
  --neon-lime: #C7FF38;
  --neon-cyan: #27E7D7;
  --neon-violet: #9B5CFF;
  --neon-coral: #FF5D72;

  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --glass-bg: rgba(17, 24, 32, 0.75);
  --glass-border: rgba(39, 231, 215, 0.2);
  --glass-border-subtle: rgba(255, 255, 255, 0.08);

  --glow-lime: 0 0 25px rgba(199, 255, 56, 0.35);
  --glow-cyan: 0 0 25px rgba(39, 231, 215, 0.35);
  --glow-violet: 0 0 25px rgba(155, 92, 255, 0.35);
  --glow-coral: 0 0 25px rgba(255, 93, 114, 0.35);

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  background: radial-gradient(circle at 50% 0%, #0d1720 0%, #070A0D 70%);
}

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

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

button, input, select, textarea {
  font-family: inherit;
  color: inherit;
}

/* Accessibility: focus visible */
:focus-visible {
  outline: 2px solid var(--neon-cyan);
  outline-offset: 4px;
}

/* UTILITY CLASSES */
.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.mono-num {
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(39, 231, 215, 0.08);
  border: 1px solid rgba(39, 231, 215, 0.3);
  color: var(--neon-cyan);
  margin-bottom: 1.5rem;
}

.gradient-text {
  background: linear-gradient(135deg, #F2F5F4 20%, var(--neon-cyan) 60%, var(--neon-lime) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-text-alt {
  background: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-violet) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 32px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  cursor: pointer;
  border: none;
  transition: var(--transition-smooth);
}

.btn-primary {
  background: var(--neon-lime);
  color: #070A0D;
  box-shadow: 0 4px 20px rgba(199, 255, 56, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(199, 255, 56, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--glass-border-subtle);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(39, 231, 215, 0.1);
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  transform: translateY(-2px);
}

.btn-glow-cyan {
  background: var(--neon-cyan);
  color: #070A0D;
  box-shadow: 0 4px 20px rgba(39, 231, 215, 0.25);
}

.btn-glow-cyan:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(39, 231, 215, 0.45);
}

/* FLOATING NAVIGATION */
.site-header {
  position: fixed;
  top: 20px;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: var(--transition-smooth);
}

.nav-wrapper {
  max-width: 1240px;
  margin: 0 auto;
  padding: 12px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  transition: var(--transition-smooth);
}

.site-header.scrolled .nav-wrapper {
  padding: 8px 24px;
  background: rgba(7, 10, 13, 0.9);
  border-color: rgba(39, 231, 215, 0.35);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.8), 0 0 15px rgba(39, 231, 215, 0.15);
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.logo-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--neon-cyan);
  transition: var(--transition-fast);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.search-trigger {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.search-trigger:hover {
  color: var(--neon-cyan);
  background: rgba(39, 231, 215, 0.1);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 6px;
}

/* SEARCH MODAL */
.search-modal {
  position: fixed;
  inset: 0;
  background: rgba(7, 10, 13, 0.85);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  z-index: 2000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 100px 20px 40px;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-fast);
}

.search-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.search-container {
  width: 100%;
  max-width: 680px;
  background: var(--bg-card);
  border: 1px solid var(--neon-cyan);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8), var(--glow-cyan);
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  padding-right: 48px;
  font-size: 1.1rem;
  color: var(--text-primary);
  outline: none;
}

.search-input:focus {
  border-color: var(--neon-cyan);
}

.search-close {
  position: absolute;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.25rem;
}

.search-results {
  margin-top: 20px;
  max-height: 380px;
  overflow-y: auto;
}

.search-result-item {
  display: block;
  padding: 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: var(--transition-fast);
}

.search-result-item:hover {
  background: var(--bg-secondary);
  border-color: rgba(39, 231, 215, 0.3);
}

.search-result-title {
  font-weight: 700;
  color: var(--neon-cyan);
  margin-bottom: 4px;
}

.search-result-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* HERO SECTION */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 130px;
  padding-bottom: 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 35%;
  filter: brightness(0.65) contrast(1.1);
  transform: scale(1.05);
  transition: transform 0.8s ease-out;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 40%, rgba(7, 10, 13, 0.4) 0%, #070A0D 90%),
              linear-gradient(to bottom, rgba(7, 10, 13, 0.5) 0%, #070A0D 100%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 10;
  width: 100%;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.hero-title {
  font-size: clamp(2.5rem, 5.5vw, 5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 580px;
  margin-bottom: 40px;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* FLOATING DATA PANEL (HERO) */
.hero-data-card {
  background: var(--glass-bg);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7), var(--glow-cyan);
  position: relative;
  overflow: hidden;
}

.hero-data-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon-lime), var(--neon-cyan), var(--neon-violet));
}

.data-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.data-card-title {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.data-card-tag {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  padding: 3px 10px;
  background: rgba(199, 255, 56, 0.15);
  color: var(--neon-lime);
  border: 1px solid rgba(199, 255, 56, 0.4);
  border-radius: var(--radius-full);
}

.data-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.data-stat {
  background: var(--bg-secondary);
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border-subtle);
}

.data-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 4px;
  text-transform: uppercase;
}

.data-stat-val {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
}

.data-stat-highlight {
  grid-column: span 2;
  background: linear-gradient(135deg, rgba(39, 231, 215, 0.1) 0%, rgba(155, 92, 255, 0.1) 100%);
  border-color: rgba(39, 231, 215, 0.3);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.data-stat-highlight .data-stat-val {
  font-size: 2.25rem;
  color: var(--neon-cyan);
}

.data-card-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* SECTION STRUCTURE */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 60px;
}

.section-title {
  font-size: clamp(2rem, 3.8vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* CALCULATOR COMPONENT */
.calculator-box {
  background: var(--bg-card);
  border: 1px solid rgba(39, 231, 215, 0.25);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  position: relative;
  overflow: hidden;
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.input-unit-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.calc-input {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  padding-right: 50px;
  font-size: 1.25rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-primary);
  outline: none;
  transition: var(--transition-fast);
}

.calc-input:focus {
  border-color: var(--neon-cyan);
  box-shadow: 0 0 15px rgba(39, 231, 215, 0.2);
}

.input-unit {
  position: absolute;
  right: 16px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--neon-cyan);
  font-weight: 600;
  pointer-events: none;
}

.sex-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.sex-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border-subtle);
  border-radius: var(--radius-md);
  padding: 14px;
  color: var(--text-secondary);
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: center;
}

.sex-btn.active {
  background: rgba(39, 231, 215, 0.15);
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  box-shadow: 0 0 15px rgba(39, 231, 215, 0.2);
}

.calc-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* CALCULATOR RESULT SCREEN */
.calc-result-panel {
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: none;
  animation: fadeIn 0.5s ease forwards;
}

.calc-result-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-columns {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 40px;
  align-items: center;
}

.circular-vis {
  position: relative;
  width: 260px;
  height: 260px;
  margin: 0 auto;
}

.circular-svg {
  transform: rotate(-90deg);
  width: 100%;
  height: 100%;
}

.vis-bg-circle {
  fill: none;
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 12;
}

.vis-meter-circle {
  fill: none;
  stroke: var(--neon-cyan);
  stroke-width: 12;
  stroke-linecap: round;
  stroke-dasharray: 691;
  stroke-dashoffset: 691;
  transition: stroke-dashoffset 1.2s cubic-bezier(0.16, 1, 0.3, 1), stroke 0.5s ease;
  filter: drop-shadow(0 0 10px rgba(39, 231, 215, 0.5));
}

.vis-center-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.vis-bmi-number {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1;
  font-family: var(--font-mono);
}

.vis-bmi-label {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-top: 4px;
}

.vis-bmi-ref {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
  font-family: var(--font-mono);
}

.result-details {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.category-banner {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-weight: 800;
  font-size: 1.1rem;
  background: rgba(39, 231, 215, 0.1);
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan);
  width: fit-content;
}

/* HORIZONTAL NEON SCALE */
.scale-wrapper {
  margin: 10px 0;
}

.scale-track {
  height: 8px;
  background: linear-gradient(to right, 
    var(--neon-cyan) 0%, 
    var(--neon-lime) 30%, 
    var(--neon-violet) 70%, 
    var(--neon-coral) 100%
  );
  border-radius: var(--radius-full);
  position: relative;
  box-shadow: 0 0 12px rgba(39, 231, 215, 0.3);
}

.scale-pointer {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 22px;
  height: 22px;
  background: #FFFFFF;
  border: 3px solid var(--bg-card);
  border-radius: 50%;
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.9);
  transition: left 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.scale-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* RANGO ORIENTATIVO CARD */
.weight-range-box {
  background: var(--bg-secondary);
  border: 1px solid rgba(199, 255, 56, 0.25);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.weight-range-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.weight-range-val {
  font-size: 2rem;
  font-weight: 800;
  color: var(--neon-lime);
  font-family: var(--font-mono);
  margin-bottom: 6px;
}

.weight-range-note {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.disclaimer-banner {
  background: rgba(255, 255, 255, 0.03);
  border-left: 3px solid var(--neon-cyan);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* IMC EXPLANATION CARDS (4 VERTICAL BLOCKS) */
.imc-grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.imc-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.imc-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
}

.imc-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.imc-card.card-cyan::before { background: var(--neon-cyan); }
.imc-card.card-lime::before { background: var(--neon-lime); }
.imc-card.card-violet::before { background: var(--neon-violet); }
.imc-card.card-coral::before { background: var(--neon-coral); }

.imc-card.card-cyan:hover { border-color: rgba(39, 231, 215, 0.4); box-shadow: var(--glow-cyan); }
.imc-card.card-lime:hover { border-color: rgba(199, 255, 56, 0.4); box-shadow: var(--glow-lime); }
.imc-card.card-violet:hover { border-color: rgba(155, 92, 255, 0.4); box-shadow: var(--glow-violet); }
.imc-card.card-coral:hover { border-color: rgba(255, 93, 114, 0.4); box-shadow: var(--glow-coral); }

.imc-card-range {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.card-cyan .imc-card-range { color: var(--neon-cyan); }
.card-lime .imc-card-range { color: var(--neon-lime); }
.card-violet .imc-card-range { color: var(--neon-violet); }
.card-coral .imc-card-range { color: var(--neon-coral); }

.imc-card-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 14px;
}

.imc-card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* PARALLAX SCENE SECTION */
.parallax-scene {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  text-align: center;
  padding: 80px 24px;
}

.parallax-bg {
  position: absolute;
  inset: -20% 0;
  z-index: 1;
  background-size: cover;
  background-position: center;
  filter: brightness(0.4) contrast(1.15);
  will-change: transform;
}

.parallax-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(7, 10, 13, 0.3) 0%, #070A0D 95%);
  z-index: 2;
}

.parallax-content {
  position: relative;
  z-index: 5;
  max-width: 860px;
}

.parallax-title {
  font-size: clamp(2rem, 4.5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 24px;
}

.parallax-subtitle {
  font-size: clamp(1.05rem, 1.3vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

/* MÁS ALLÁ DEL NÚMERO (4 PILLARS) */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.pillar-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.pillar-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--neon-cyan);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6), 0 0 20px rgba(39, 231, 215, 0.2);
}

.pillar-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(39, 231, 215, 0.08);
  border: 1px solid rgba(39, 231, 215, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--neon-cyan);
  transition: var(--transition-fast);
}

.pillar-card:hover .pillar-icon-box {
  background: var(--neon-cyan);
  color: #070A0D;
  box-shadow: var(--glow-cyan);
}

.pillar-title {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.pillar-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* HEIGHT SLIDER INTERACTIVE WITH CSS/SVG SILHOUETTE */
.height-interactive-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.height-control-col {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.range-slider-wrap {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.range-slider-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.range-slider-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--neon-cyan);
  font-family: var(--font-mono);
}

.custom-range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  outline: none;
  border: 1px solid var(--glass-border-subtle);
}

.custom-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--neon-cyan);
  cursor: pointer;
  box-shadow: var(--glow-cyan);
  border: 2px solid #FFFFFF;
}

.custom-range::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--neon-cyan);
  cursor: pointer;
  box-shadow: var(--glow-cyan);
  border: 2px solid #FFFFFF;
}

.height-result-card {
  background: var(--bg-secondary);
  border: 1px solid rgba(199, 255, 56, 0.3);
  border-radius: var(--radius-md);
  padding: 24px;
}

.height-vis-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border-subtle);
  border-radius: var(--radius-md);
  padding: 30px;
  height: 380px;
  position: relative;
  overflow: hidden;
}

.silhouette-container {
  height: 100%;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  position: relative;
  width: 100%;
}

.silhouette-svg {
  transition: transform 0.3s ease-out;
  transform-origin: bottom center;
}

.height-grid-ruler {
  position: absolute;
  left: 20px;
  top: 30px;
  bottom: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  border-right: 1px dashed rgba(255, 255, 255, 0.15);
  padding-right: 12px;
}

/* REALTIME WEIGHT SIMULATOR (CAMBIA EL NÚMERO) */
.simulator-box {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.sim-output-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.sim-output-stat {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
}

.sim-output-stat.highlight {
  grid-column: span 2;
  border-color: rgba(39, 231, 215, 0.4);
  background: rgba(39, 231, 215, 0.05);
}

/* ARTICLES LISTING / MAGAZINE GRID */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 32px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-smooth);
}

.article-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: rgba(39, 231, 215, 0.35);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6);
}

.article-category {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--neon-cyan);
  margin-bottom: 12px;
}

.article-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 14px;
}

.article-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
  flex-grow: 1;
}

.article-card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--neon-lime);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-card:hover .article-card-link {
  color: var(--neon-cyan);
}

/* FAQ ACCORDION */
.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--glass-border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-fast);
}

.faq-item.active {
  border-color: rgba(39, 231, 215, 0.3);
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.5);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 22px 28px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-item.active .faq-question {
  color: var(--neon-cyan);
}

.faq-icon {
  font-size: 1.25rem;
  transition: transform var(--transition-fast);
  color: var(--neon-cyan);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  padding: 0 28px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 24px;
}

/* FOOTER */
.site-footer {
  background: #040608;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 80px 0 40px;
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-brand-title {
  font-size: 1.3rem;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.footer-brand-tagline {
  color: var(--neon-cyan);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.footer-brand-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 320px;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--neon-cyan);
}

.footer-disclaimer-box {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 40px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
}

/* ARTICLE DETAIL & CONTENT PAGES */
.article-header {
  padding-top: 160px;
  padding-bottom: 60px;
  text-align: center;
}

.article-body-wrapper {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.1rem;
  line-height: 1.8;
  color: #D1D8D6;
}

.article-body-wrapper p {
  margin-bottom: 24px;
}

.article-body-wrapper h2 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 48px;
  margin-bottom: 20px;
}

.article-body-wrapper h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--neon-cyan);
  margin-top: 36px;
  margin-bottom: 16px;
}

.article-body-wrapper ul, .article-body-wrapper ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

.article-body-wrapper li {
  margin-bottom: 8px;
}

.article-body-wrapper blockquote {
  border-left: 3px solid var(--neon-cyan);
  background: rgba(39, 231, 215, 0.05);
  padding: 20px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 32px 0;
  font-style: italic;
  color: var(--text-primary);
}

/* CONTACT FORM */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.form-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-field {
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-input, .form-textarea {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  color: var(--text-primary);
  outline: none;
  font-size: 1rem;
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--neon-cyan);
  box-shadow: 0 0 15px rgba(39, 231, 215, 0.2);
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.form-checkbox input {
  accent-color: var(--neon-cyan);
  width: 18px;
  height: 18px;
}

/* RESPONSIVE BREAKPOINTS */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .height-interactive-card, .simulator-box {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .site-header {
    top: 10px;
  }
  .nav-wrapper {
    padding: 10px 18px;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 20px;
    right: 20px;
    background: rgba(7, 10, 13, 0.97);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.8);
  }
  .nav-links.active {
    display: flex;
  }
  .mobile-menu-btn {
    display: block;
  }
  .result-columns {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

/* REDUCED MOTION PREFERENCE */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .parallax-bg {
    transform: none !important;
  }
}