/* ============================================
   NutriPerro - Premium Blue & White Design
   Modern, clean, professional veterinary app
   ============================================ */

/* === CSS Variables === */
:root {
  /* Primary Colors - Deep Navy Blue Palette */
  --color-navy-900: #0a1628;
  --color-navy-800: #0f2137;
  --color-navy-700: #152d4a;
  --color-navy-600: #1d3a5f;
  --color-navy-500: #2a4a73;
  --color-navy-400: #3d6291;
  --color-navy-300: #5a82b0;
  --color-navy-200: #8aadd4;
  --color-navy-100: #c4d9f0;
  --color-navy-50: #e8f1fa;
  
  /* Accent Colors */
  --color-accent: #3b82f6;
  --color-accent-light: #60a5fa;
  --color-accent-dark: #2563eb;
  --color-accent-glow: rgba(59, 130, 246, 0.25);
  
  /* Success / Warning / Error */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  
  /* Neutral Colors */
  --color-white: #ffffff;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  
  /* Semantic Colors */
  --bg-primary: var(--color-navy-900);
  --bg-secondary: var(--color-navy-800);
  --bg-card: var(--color-white);
  --bg-card-alt: var(--color-gray-50);
  
  --text-primary: var(--color-navy-900);
  --text-secondary: var(--color-gray-600);
  --text-muted: var(--color-gray-500);
  --text-inverse: var(--color-white);
  
  --border-light: var(--color-gray-200);
  --border-medium: var(--color-gray-300);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(10, 22, 40, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(10, 22, 40, 0.07), 0 2px 4px -2px rgba(10, 22, 40, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(10, 22, 40, 0.08), 0 4px 6px -4px rgba(10, 22, 40, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(10, 22, 40, 0.1), 0 8px 10px -6px rgba(10, 22, 40, 0.05);
  --shadow-card: 0 1px 3px rgba(10, 22, 40, 0.08), 0 8px 24px rgba(10, 22, 40, 0.06);
  --shadow-card-hover: 0 4px 12px rgba(10, 22, 40, 0.1), 0 16px 40px rgba(10, 22, 40, 0.12);
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Spacing */
  --container-max: 1200px;
  --container-padding: 1.5rem;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

/* === Base Reset === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Screen reader only - for SEO and accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

/* === Layout === */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

#app {
  position: relative;
  min-height: 100vh;
}

/* === Background Decoration === */
.bg-decoration {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.bg-circle {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
}

.bg-circle-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  top: -200px;
  right: -100px;
}

.bg-circle-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
  bottom: 20%;
  left: -150px;
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* === Hero Section === */
.hero-section {
  position: relative;
  z-index: 1;
  padding: 2rem 0 4rem;
  background: linear-gradient(180deg, var(--color-navy-900) 0%, var(--color-navy-800) 100%);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  margin-bottom: 3rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.logo-img {
  height: 45px;
  width: auto;
  object-fit: contain;
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.logo-icon svg {
  width: 24px;
  height: 24px;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-inverse);
  letter-spacing: -0.02em;
}

.logo-highlight {
  color: var(--color-accent-light);
}

.nav-tagline {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-gray-400);
  font-size: 0.875rem;
  font-weight: 500;
}

.nav-dot {
  width: 6px;
  height: 6px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.1); }
}

.hero-content {
  max-width: 680px;
  margin-bottom: 3rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent-light);
  margin-bottom: 1.5rem;
}

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

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--text-inverse);
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.title-accent {
  display: block;
  background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-accent) 50%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--color-gray-400);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  font-family: 'Outfit', sans-serif;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--color-gray-300);
  border: 2px solid var(--color-navy-500);
}

.btn-outline:hover {
  background: var(--color-navy-700);
  border-color: var(--color-navy-400);
  color: var(--text-inverse);
}

.btn-full {
  width: 100%;
}

.btn-reset {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.875rem;
  font-family: 'Outfit', sans-serif;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-gray-400);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-reset svg {
  width: 14px;
  height: 14px;
}

.btn-reset:hover {
  color: var(--text-inverse);
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
}

/* === Hero Stats === */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.stat-pill {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  backdrop-filter: blur(10px);
}

.stat-number {
  font-family: 'Space Mono', monospace;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-accent-light);
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--color-gray-400);
}

/* === Features Section === */
.features-section {
  position: relative;
  z-index: 1;
  padding: 4rem 0;
  background: var(--color-navy-800);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  padding: 2rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.feature-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(59, 130, 246, 0.2);
  transform: translateY(-4px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(59, 130, 246, 0.05) 100%);
  border-radius: var(--radius-lg);
  margin-bottom: 1.25rem;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-accent-light);
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-inverse);
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--color-gray-400);
  line-height: 1.6;
}

/* === Calculator Section === */
.calculator-section {
  position: relative;
  z-index: 1;
  padding: 5rem 0;
  background: linear-gradient(180deg, var(--color-navy-800) 0%, var(--color-navy-900) 100%);
}

.section-header {
  margin-bottom: 3rem;
}

.section-header.center {
  text-align: center;
}

.section-tag {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  color: var(--text-inverse);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.section-header p {
  font-size: 1.0625rem;
  color: var(--color-gray-400);
}

/* Info section override - fondo blanco */
.info-section .section-header h2 {
  color: var(--text-primary);
}

.info-section .section-header p {
  color: var(--text-secondary);
}

/* === Calculator Layout === */
.calculator-layout {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 1100px;
  margin: 0 auto;
}

/* Headers Row */
.calculator-headers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

/* Progress Row */
.progress-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.progress-placeholder {
  /* Espacio vacío para alinear con el progress */
}

/* Content Columns */
.calculator-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

/* === Form Column === */
.form-column {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

/* === Results Column === */
.results-column {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

/* En móvil - Formulario primero */
@media (max-width: 1024px) {
  .calculator-headers {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  /* Ocultar header de resultados en móvil */
  .calculator-headers .results-header {
    display: none;
  }
  
  .progress-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .progress-placeholder {
    display: none;
  }
  
  .calculator-columns {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  /* Formulario primero, resultados después */
  .form-column {
    order: 1;
  }
  
  .results-column {
    order: 2;
  }
}

.form-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 0.5rem 0;
  margin-bottom: 0.5rem;
}

.form-header-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.form-header-tag {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent-light);
}

.form-header h3 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-inverse);
  margin: 0;
}

/* Progress Indicator */
.form-progress {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 0.875rem 1rem;
  margin-bottom: 0.75rem;
}

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  opacity: 0.5;
  transition: all var(--transition-base);
}

.progress-step.active {
  opacity: 1;
}

.progress-step.completed {
  opacity: 1;
}

.progress-step.completed .step-number {
  background: var(--color-success);
  border-color: var(--color-success);
}

.step-number {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 2px solid var(--color-gray-500);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-gray-400);
  transition: all var(--transition-base);
}

.progress-step.active .step-number {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2);
}

.step-label {
  font-size: 0.625rem;
  font-weight: 600;
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.progress-step.active .step-label {
  color: var(--color-accent-light);
}

.progress-step.completed .step-label {
  color: var(--color-success);
}

.progress-line {
  flex: 1;
  height: 2px;
  background: var(--color-gray-600);
  margin: 0 0.25rem;
  margin-bottom: 1rem;
  border-radius: 1px;
  position: relative;
  overflow: hidden;
}

.progress-line::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 0%;
  background: var(--color-accent);
  transition: width var(--transition-slow);
}

.progress-line.filled::after {
  width: 100%;
}

@media (max-width: 768px) {
  .form-progress {
    padding: 0.75rem;
  }
  
  .step-label {
    display: none;
  }
  
  .step-number {
    width: 24px;
    height: 24px;
    font-size: 0.6875rem;
  }
}

.form-icon {
  font-size: 1.25rem;
}

/* === Form Cards === */
.form-card {
  background: linear-gradient(135deg, var(--color-navy-700) 0%, var(--color-navy-800) 100%);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.form-card:hover {
  box-shadow: var(--shadow-card-hover);
}

.form-card-header {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 1rem 1.25rem 0.5rem;
}

.form-card-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(59, 130, 246, 0.15);
  border-radius: var(--radius-sm);
}

.form-card-icon svg {
  width: 16px;
  height: 16px;
  color: var(--color-accent-light);
}

.form-card-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-inverse);
}

.form-card-content {
  padding: 0.5rem 1.25rem 1.25rem;
}

/* === Select Input === */
.select-wrapper {
  position: relative;
}

.form-select {
  width: 100%;
  padding: 0.875rem 2.5rem 0.875rem 1rem;
  font-family: 'Outfit', sans-serif;
  font-size: 0.9375rem;
  color: var(--text-inverse);
  background: rgba(255, 255, 255, 0.08);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  cursor: pointer;
  appearance: none;
  transition: all var(--transition-fast);
}

.form-select option {
  background: var(--color-navy-800);
  color: var(--text-inverse);
}

.form-select:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.form-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-accent-glow);
}

.select-arrow {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--color-gray-400);
  pointer-events: none;
}

.form-hint {
  margin-top: 0.5rem;
  font-size: 0.8125rem;
  color: var(--color-accent-light);
  font-weight: 500;
}

/* === Weight Display === */
.weight-display {
  text-align: center;
  margin-bottom: 1rem;
}

.weight-value {
  font-family: 'Space Mono', monospace;
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--text-inverse);
  line-height: 1;
}

.weight-unit {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-gray-400);
  margin-left: 0.25rem;
}

/* === Slider === */
.slider-container {
  padding: 0 0.5rem;
}

.form-slider {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  cursor: pointer;
  appearance: none;
}

.form-slider::-webkit-slider-thumb {
  appearance: none;
  width: 24px;
  height: 24px;
  background: var(--color-accent);
  border-radius: 50%;
  border: 4px solid var(--color-navy-700);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.4);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.form-slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.form-slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  background: var(--color-accent);
  border-radius: 50%;
  border: 4px solid var(--color-navy-700);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.4);
  cursor: pointer;
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--color-gray-400);
}

/* === Option Buttons Grid === */
.option-grid {
  display: grid;
  gap: 0.5rem;
}

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

.option-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.125rem;
  padding: 0.75rem 0.5rem;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-fast);
}

.option-btn:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
}

.option-btn.selected {
  border-color: var(--color-accent);
  background: rgba(59, 130, 246, 0.15);
}

.option-emoji {
  font-size: 1.25rem;
  margin-bottom: 0.125rem;
}

.option-btn strong {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-inverse);
}

.option-desc {
  font-size: 0.6875rem;
  color: var(--color-gray-400);
}

/* === Activity Buttons === */
.activity-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.activity-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.activity-btn:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
}

.activity-btn.selected {
  border-color: var(--color-accent);
  background: rgba(59, 130, 246, 0.15);
}

.activity-emoji {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.activity-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.activity-text strong {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-inverse);
}

.activity-text span {
  font-size: 0.6875rem;
  color: var(--color-gray-400);
}

.activity-factor {
  font-family: 'Space Mono', monospace;
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--color-accent-light);
  padding: 0.2rem 0.4rem;
  background: rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-sm);
}

/* === Health Section === */
.health-section {
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.health-section:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.health-section:first-child {
  padding-top: 0;
}

.health-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-inverse);
  margin-bottom: 0.5rem;
}

.toggle-group {
  display: flex;
  gap: 0.5rem;
}

.toggle-btn {
  flex: 1;
  padding: 0.5rem 0.75rem;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  font-family: 'Outfit', sans-serif;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-gray-400);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.toggle-btn:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.toggle-btn.selected {
  border-color: var(--color-accent);
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-accent-light);
}

.condition-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.condition-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.625rem 0.5rem;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.condition-btn:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.condition-btn.selected {
  border-color: var(--color-accent);
  background: rgba(59, 130, 246, 0.15);
}

.condition-emoji {
  font-size: 1.125rem;
}

.condition-text {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-gray-400);
}

.condition-btn.selected .condition-text {
  color: var(--color-accent-light);
}

/* === Mobile CTA === */
.mobile-cta {
  display: none;
  padding: 1rem 0;
}

@media (max-width: 1024px) {
  .mobile-cta {
    display: block;
  }
}

/* === Results Column === */
.results-column {
  position: relative;
  align-self: start;
}

.results-sticky {
  position: -webkit-sticky;
  position: sticky;
  top: 20px;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* En móvil, no sticky y mostrar primero */
@media (max-width: 1024px) {
  .results-column {
    order: -1;
  }
  
  .results-sticky {
    position: relative;
    top: 0;
  }
}

.results-header {
  padding: 0.5rem 0;
}

.results-tag {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
}

.results-header h3 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-inverse);
  margin-top: 0.25rem;
}

/* === Results Main Card === */
.results-main-card {
  background: linear-gradient(135deg, var(--color-navy-700) 0%, var(--color-navy-800) 100%);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.results-hero {
  padding: 1.5rem 1.25rem;
  text-align: center;
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.12) 0%, transparent 100%);
}

.results-icon {
  width: 40px;
  height: 40px;
  margin: 0 auto 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

.results-icon svg {
  width: 20px;
  height: 20px;
  color: var(--color-accent-light);
}

.results-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-gray-400);
  margin-bottom: 0.375rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.calories-display {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.375rem;
}

.calories-number {
  font-family: 'Space Mono', monospace;
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1;
}

.calories-unit {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-gray-400);
}

.results-metrics {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.2);
}

.metric-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.125rem;
}

.metric-box svg {
  width: 16px;
  height: 16px;
  color: var(--color-gray-400);
  margin-bottom: 0.125rem;
}

.metric-value {
  font-family: 'Space Mono', monospace;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-white);
}

.metric-label {
  font-size: 0.625rem;
  color: var(--color-gray-400);
}

.metric-divider {
  width: 1px;
  height: 36px;
  background: rgba(255, 255, 255, 0.1);
}

/* === Results Cards === */
.results-card {
  background: linear-gradient(135deg, var(--color-navy-700) 0%, var(--color-navy-800) 100%);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.results-card-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-inverse);
  margin-bottom: 0.875rem;
}

.results-card-title svg {
  width: 16px;
  height: 16px;
  color: var(--color-accent-light);
}

/* === Macros Grid === */
.macros-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.625rem;
}

.macro-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.875rem 0.5rem;
  background: var(--bg-card-alt);
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid var(--border-light);
}

.macro-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  margin-bottom: 0.375rem;
}

.macro-icon svg {
  width: 16px;
  height: 16px;
}

.macro-protein .macro-icon {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.macro-fat .macro-icon {
  background: rgba(245, 158, 11, 0.1);
  color: #f59e0b;
}

.macro-carbs .macro-icon {
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.macro-value {
  font-family: 'Space Mono', monospace;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.macro-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.macro-unit {
  font-size: 0.625rem;
  color: var(--text-muted);
}

/* === Food Items === */
.food-items {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.food-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.food-info {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.food-emoji {
  font-size: 1.25rem;
}

.food-details {
  display: flex;
  flex-direction: column;
}

.food-details strong {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-inverse);
}

.food-details span {
  font-size: 0.6875rem;
  color: var(--color-gray-400);
}

.food-amount {
  text-align: right;
}

.food-value {
  font-family: 'Space Mono', monospace;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-inverse);
}

.food-unit {
  font-size: 0.6875rem;
  color: var(--color-gray-400);
}

.food-progress {
  height: 5px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 0.375rem;
}

.food-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.food-progress.wet .food-progress-bar {
  background: linear-gradient(90deg, #f59e0b 0%, #fbbf24 100%);
}

.meals-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  margin-top: 0.375rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

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

.meals-label {
  font-size: 0.75rem;
  color: var(--color-gray-400);
  flex: 1;
}

.meals-value {
  font-family: 'Space Mono', monospace;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-accent);
}

/* === Water Card === */
.water-card {
  background: linear-gradient(135deg, var(--color-navy-700) 0%, var(--color-navy-800) 100%);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.water-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.water-info {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.water-info svg {
  width: 20px;
  height: 20px;
  color: var(--color-accent-light);
}

.water-info > div {
  display: flex;
  flex-direction: column;
}

.water-label {
  font-size: 0.75rem;
  color: var(--color-gray-400);
}

.water-value {
  font-family: 'Space Mono', monospace;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-accent-light);
}

.water-emoji {
  font-size: 1.5rem;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.water-note {
  margin-top: 0.625rem;
  font-size: 0.6875rem;
  color: var(--text-muted);
  font-style: italic;
}

/* === Disclaimer === */
.disclaimer {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  padding: 0.875rem;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-md);
}

.disclaimer svg {
  width: 18px;
  height: 18px;
  color: var(--color-warning);
  flex-shrink: 0;
  margin-top: 1px;
}

.disclaimer p {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* === Info Section === */
.info-section {
  position: relative;
  z-index: 1;
  padding: 5rem 0;
  background: var(--color-white);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.info-card {
  padding: 2rem;
  background: var(--bg-card-alt);
  border-radius: var(--radius-xl);
  position: relative;
}

.info-step {
  display: inline-block;
  font-family: 'Space Mono', monospace;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-gray-200);
  line-height: 1;
  margin-bottom: 1rem;
}

.info-card h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.info-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.info-card code {
  display: inline-block;
  padding: 0.125rem 0.375rem;
  background: var(--color-navy-100);
  color: var(--color-navy-700);
  font-family: 'Space Mono', monospace;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}

.info-card code sup {
  font-size: 0.625rem;
}

/* === Footer === */
.footer {
  position: relative;
  z-index: 1;
  padding: 3rem 0;
  background: var(--color-navy-900);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
  text-align: center;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  margin-bottom: 1.5rem;
}

.footer-logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
}

.footer-text {
  font-size: 0.9375rem;
  color: var(--color-gray-400);
  max-width: 500px;
  margin: 0 auto 1.5rem;
  line-height: 1.6;
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-copyright {
  font-size: 0.8125rem;
  color: var(--color-gray-500);
}

/* === Responsive === */
@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
  }
  
  .navbar {
    flex-wrap: wrap;
    gap: 1rem;
  }
  
  .nav-tagline {
    display: none;
  }
  
  .hero-content {
    margin-bottom: 2rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-stats {
    flex-direction: column;
    align-items: stretch;
  }
  
  .stat-pill {
    justify-content: center;
  }
  
  .option-grid.cols-2 {
    grid-template-columns: 1fr;
  }
  
  .condition-grid {
    grid-template-columns: 1fr;
  }
  
  .macros-grid {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  
  .macro-item {
    flex-direction: row;
    justify-content: space-between;
    padding: 1rem;
  }
  
  .macro-icon {
    margin-bottom: 0;
  }
  
  .results-sticky {
    position: static;
  }
  
  .calories-number {
    font-size: 3rem;
  }
  
  .results-metrics {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
  
  .metric-divider {
    display: none;
  }
}

/* === Animations === */
@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.form-card {
  animation: slideUp 0.4s ease forwards;
}

.form-card:nth-child(1) { animation-delay: 0.1s; }
.form-card:nth-child(2) { animation-delay: 0.15s; }
.form-card:nth-child(3) { animation-delay: 0.2s; }
.form-card:nth-child(4) { animation-delay: 0.25s; }
.form-card:nth-child(5) { animation-delay: 0.3s; }

/* === Print Styles === */
@media print {
  .hero-section,
  .features-section,
  .form-column,
  .footer {
    display: none;
  }
  
  .calculator-section {
    padding: 0;
  }
  
  .results-column {
    width: 100%;
  }
}