/* ==========================================================================
   NutriCalc - Clean Clinical Wellness Design System
   Arquitectura CSS3 pura sin dependencias externas
   Paleta: Verde Esmeralda (#124E48), Menta Suave (#E6F2F0),
             Coral de Alerta (#E07A5F), Fondo Neutro (#F8F9FA / #FFFFFF),
             Texto Grafito (#1A202C).
   ========================================================================== */

/* 1. Variables & Tokens de Diseño */
:root {
  --color-primary: #124E48;
  --color-primary-hover: #19675F;
  --color-primary-dark: #0B332F;
  --color-primary-light: #E6F2F0;
  --color-primary-subtle: #F0F7F6;

  --color-secondary: #2C7A7B;
  --color-accent-coral: #E07A5F;
  --color-accent-coral-hover: #C75D42;
  --color-accent-coral-light: #FDF1EE;

  --color-macro-p: #2B6CB0; /* Proteínas */
  --color-macro-p-light: #EBF8FF;
  --color-macro-l: #D69E2E; /* Grasas / Lípidos */
  --color-macro-l-light: #FEFCBF;
  --color-macro-g: #319795; /* Carbohidratos */
  --color-macro-g-light: #E6FFFA;

  --color-bg-page: #F8F9FA;
  --color-bg-card: #FFFFFF;
  --color-bg-subtle: #F1F5F9;

  --color-text-main: #1A202C;
  --color-text-muted: #4A5568;
  --color-text-subtle: #718096;
  --color-text-inverse: #FFFFFF;

  --color-border: #E2E8F0;
  --color-border-focus: #124E48;

  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-soft: 0 8px 30px rgba(18, 78, 72, 0.06);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --container-max-width: 1200px;
  --container-narrow: 860px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* 2. Reset & Normalización */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  max-width: 100vw;
}

body {
  font-family: var(--font-family-base);
  color: var(--color-text-main);
  background-color: var(--color-bg-page);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  max-width: 100vw;
  width: 100%;
}

img, svg {
  vertical-align: middle;
  max-width: 100%;
  height: auto;
}

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

a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* 3. Tipografía General */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary-dark);
  font-weight: 700;
  line-height: 1.25;
}

h1 { font-size: clamp(1.85rem, 3.5vw, 2.5rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.4rem, 2.5vw, 1.85rem); letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

p {
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

/* 4. Maquetación & Cuadrículas */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.main-content {
  flex: 1 0 auto;
  padding-top: 1.5rem;
  padding-bottom: 3.5rem;
}

/* 5. Cabecera (Header) & Navegación */
.site-header {
  background-color: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  text-decoration: none !important;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), #1b736b);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(18, 78, 72, 0.25);
}

.brand-badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  margin-left: 0.35rem;
  letter-spacing: 0.05em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-decoration: none !important;
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color var(--transition-fast);
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
}

.nav-cta {
  background-color: var(--color-primary);
  color: var(--color-text-inverse) !important;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.nav-cta:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  padding: 0.5rem;
  color: var(--color-primary);
}

/* 6. Sección Hero / Encabezado de página */
.hero-banner {
  background: linear-gradient(180deg, var(--color-primary-light) 0%, rgba(248, 249, 250, 0.4) 100%);
  padding: 2.5rem 0 2rem 0;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.hero-title {
  margin-bottom: 0.75rem;
  color: var(--color-primary-dark);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 650px;
  margin: 0 auto;
}

/* 7. Componentes Comunes (Tarjetas, Botones, Badges) */
.card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 1.75rem;
  box-shadow: var(--shadow-soft);
  margin-bottom: 1.5rem;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--color-border);
}

.card-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: clamp(1.05rem, 3.5vw, 1.25rem);
  color: var(--color-primary-dark);
  font-weight: 700;
  min-width: 0;
}

.card-header .badge {
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none !important;
  transition: all var(--transition-fast);
  line-height: 1;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  color: #FFFFFF;
}

.btn-secondary {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.btn-secondary:hover {
  background-color: #d6e8e5;
  color: var(--color-primary-dark);
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-main);
}

.btn-outline:hover {
  background-color: var(--color-bg-subtle);
  border-color: var(--color-text-subtle);
}

.btn-danger-outline {
  background-color: transparent;
  border: 1px solid #FED7D7;
  color: #C53030;
}

.btn-danger-outline:hover {
  background-color: #FFF5F5;
}

.btn-sm {
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1;
}

.badge-mint {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.badge-coral {
  background-color: var(--color-accent-coral-light);
  color: var(--color-accent-coral-hover);
}

/* 8. Estructura de la Calculadora (Grid principal) */
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem;
  margin-bottom: 2rem;
}

@media (max-width: 900px) {
  .calc-grid {
    grid-template-columns: 1fr;
  }
}

/* 9. Formulario TDEE / BMR */
.form-group {
  margin-bottom: 1.15rem;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 0.4rem;
}

.form-label small {
  font-weight: normal;
  color: var(--color-text-subtle);
}

.form-control {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: #FFFFFF;
  color: var(--color-text-main);
  font-size: 16px; /* Evita el zoom automático en iOS Safari */
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

select.form-control {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%234A5568' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  background-size: 14px;
  padding-right: 2.25rem;
  cursor: pointer;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(18, 78, 72, 0.12);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

.form-row-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.form-row > *, .form-row-3 > * {
  min-width: 0;
}

/* Botones de opción de radio estilizados */
.radio-chips {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

.radio-chips.cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.radio-chip-label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px; /* Estándares táctiles Apple / Google */
  padding: 0.6rem 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: #FFFFFF;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.radio-chip-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.radio-chip-input:checked + .radio-chip-label {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}

/* Resultado de la Calculadora TDEE */
.tdee-result-box {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-top: 1.25rem;
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.tdee-result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.tdee-main-display {
  min-width: 0;
}

.tdee-result-caption {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.85;
  margin-bottom: 0.2rem;
}

.tdee-result-val {
  font-size: clamp(1.85rem, 5vw, 2.35rem);
  font-weight: 800;
  line-height: 1.1;
  color: #FFFFFF;
}

.tdee-result-unit {
  font-size: 0.95rem;
  font-weight: 500;
  opacity: 0.85;
}

.tdee-sub-stats {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  background: rgba(0, 0, 0, 0.22);
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  white-space: nowrap;
}

.tdee-sub-stat {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
}

.tdee-sub-stat span {
  opacity: 0.85;
}

.tdee-sub-stat strong {
  font-weight: 700;
  color: #FFFFFF;
}

.tdee-macros-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.tdee-macro-item {
  background: rgba(255, 255, 255, 0.08);
  padding: 0.65rem 0.35rem;
  border-radius: var(--radius-sm);
  text-align: center;
  min-width: 0;
}

.tdee-macro-name {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  opacity: 0.85;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tdee-macro-qty {
  font-size: 1.15rem;
  font-weight: 700;
  margin-top: 0.2rem;
}

.tdee-macro-pct {
  font-size: 0.68rem;
  opacity: 0.75;
}

/* 10. Rastreador Visual de Progreso */
.tracker-card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 1.75rem;
  box-shadow: var(--shadow-soft);
}

.tracker-hero {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 600px) {
  .tracker-hero {
    flex-direction: column;
    text-align: center;
  }
}

/* Indicador Circular SVG */
.gauge-wrapper {
  position: relative;
  width: 160px;
  height: 160px;
  flex-shrink: 0;
}

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

.gauge-bg {
  fill: none;
  stroke: var(--color-border);
  stroke-width: 12;
}

.gauge-progress {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 12;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.6s ease, stroke var(--transition-normal);
}

.gauge-progress.over-budget {
  stroke: var(--color-accent-coral) !important;
}

.gauge-center-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.gauge-value {
  font-size: 1.65rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-primary-dark);
}

.gauge-label {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
  font-weight: 600;
  text-transform: uppercase;
}

.tracker-stats {
  flex: 1;
}

.tracker-stat-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.tracker-stat-label {
  color: var(--color-text-muted);
}

.tracker-stat-value {
  font-weight: 700;
}

/* Estado de alerta / superación */
.budget-alert {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 0.75rem;
}

.budget-alert.safe {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.budget-alert.warning {
  background-color: var(--color-accent-coral-light);
  color: var(--color-accent-coral-hover);
  border: 1px solid rgba(224, 122, 95, 0.3);
}

/* Barras de progreso de macros */
.macro-progress-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

.macro-progress-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.macro-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
}

.macro-bar-track {
  width: 100%;
  height: 8px;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.macro-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.4s ease;
}

.macro-bar-fill.protein { background-color: var(--color-macro-p); }
.macro-bar-fill.fat { background-color: var(--color-macro-l); }
.macro-bar-fill.carb { background-color: var(--color-macro-g); }

/* 11. Diario Nutricional */
.journal-section {
  margin-bottom: 2.5rem;
}

.search-box-wrapper {
  position: relative;
  margin-bottom: 1.25rem;
}

.search-input-group {
  display: flex;
  gap: 0.75rem;
}

.search-input-inner {
  position: relative;
  flex: 1;
}

.search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-subtle);
  pointer-events: none;
}

.search-input {
  padding-left: 2.5rem !important;
}

/* Lista de autocompletado en vivo */
.autocomplete-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-height: 280px;
  overflow-y: auto;
  z-index: 40;
  display: none;
}

.autocomplete-dropdown.show {
  display: block;
}

.autocomplete-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.65rem 1rem;
  border-bottom: 1px solid #F1F5F9;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.autocomplete-item:last-child {
  border-bottom: none;
}

.autocomplete-item:hover, .autocomplete-item.active {
  background-color: var(--color-primary-light);
}

.autocomplete-item-name {
  font-weight: 600;
  color: var(--color-text-main);
}

.autocomplete-item-cat {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
  display: block;
}

.autocomplete-item-meta {
  font-size: 0.8rem;
  color: var(--color-primary-dark);
  font-weight: 600;
  text-align: right;
}

/* Zona de adición de porciones */
.add-portion-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--color-bg-subtle);
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
}

.selected-food-badge {
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.portion-input-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.portion-qty-input {
  width: 90px;
}

.quick-weights {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.btn-chip {
  padding: 0.4rem 0.65rem;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-chip:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Tabla del Diario Nutricional */
.journal-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  width: 100%;
}

.journal-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.journal-table th {
  background-color: var(--color-bg-subtle);
  padding: 0.75rem 1rem;
  font-weight: 700;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.journal-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.journal-table tr:last-child td {
  border-bottom: none;
}

.journal-table tr:hover td {
  background-color: #FAFCFC;
}

.food-title {
  font-weight: 600;
  color: var(--color-text-main);
}

.food-sub {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
}

.empty-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--color-text-subtle);
}

.empty-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 0.75rem;
  color: var(--color-text-subtle);
  opacity: 0.6;
}

/* 12. Modal de Alimento Personalizado */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(11, 51, 47, 0.45);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}

.modal-overlay.show {
  display: flex;
}

.modal-dialog {
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  max-width: 480px;
  width: 100%;
  padding: 1.75rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  animation: modalIn 0.2s ease-out;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-close-btn {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  color: var(--color-text-subtle);
  font-size: 1.25rem;
  line-height: 1;
  padding: 0.25rem;
}

.modal-close-btn:hover {
  color: var(--color-text-main);
}

/* 13. Cuadrícula de Artículos y Hub Educativo */
.articles-section {
  margin-top: 3rem;
}

.section-intro {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 2rem auto;
}

.section-title {
  margin-bottom: 0.5rem;
}

.section-desc {
  color: var(--color-text-muted);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.article-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
  text-decoration: none !important;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.article-card-title {
  font-size: 1.15rem;
  color: var(--color-primary-dark);
  margin-bottom: 0.6rem;
  line-height: 1.35;
}

.article-card-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  border-top: 1px solid var(--color-border);
  padding-top: 0.75rem;
}

/* 14. Estructura de Artículo Completo (Single Article View) */
.article-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-subtle);
  margin-bottom: 1rem;
}

.breadcrumbs a {
  color: var(--color-text-muted);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
}

.article-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--color-text-subtle);
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-text-main);
}

.article-content h2 {
  margin-top: 2.25rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.article-content h3 {
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
}

.article-content ul, .article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

.article-content li {
  margin-bottom: 0.5rem;
}

/* Cuadros Clínicos y Prácticos */
.callout-box {
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
  border-left: 4px solid var(--color-primary);
  background-color: var(--color-primary-light);
}

.callout-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.callout-warning {
  border-left-color: var(--color-accent-coral);
  background-color: var(--color-accent-coral-light);
}

.callout-warning .callout-title {
  color: var(--color-accent-coral-hover);
}

/* Tablas Nutricionales en los Artículos */
.content-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.content-table th {
  background-color: var(--color-primary);
  color: #FFFFFF;
  padding: 0.75rem 1rem;
  font-weight: 600;
  text-align: left;
}

.content-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

.content-table tr:nth-child(even) td {
  background-color: #F8FAFC;
}

/* 15. Advertencia Médica (Medical Disclaimer) */
.medical-disclaimer {
  background-color: #FFFDF5;
  border: 1px solid #FEEBC8;
  border-left: 4px solid #DD6B20;
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin: 2rem 0;
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  font-size: 0.88rem;
  line-height: 1.5;
  color: #744210;
}

.disclaimer-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  color: #DD6B20;
  margin-top: 0.15rem;
}

/* 16. Pie de página (Footer) */
.site-footer {
  background-color: var(--color-primary-dark);
  color: #E2E8F0;
  padding-top: 3.5rem;
  padding-bottom: 2rem;
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 1.05rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.footer-col p {
  font-size: 0.9rem;
  color: #A0AEC0;
  line-height: 1.6;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  color: #CBD5E0;
  font-size: 0.9rem;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.85rem;
  color: #A0AEC0;
}

/* 17. Banner de Cookies RGPD */
.cookie-banner {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  max-width: 440px;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.15), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  z-index: 99;
  display: none;
  animation: slideUp 0.3s ease-out;
}

.cookie-banner.show {
  display: block;
}

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

.cookie-text {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.cookie-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

/* 18. Cuadrículas & Componentes Específicos */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.related-articles-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* 19. Media Queries & Adaptaciones Móviles Exhaustivas */
@media (max-width: 900px) {
  .calc-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .site-header {
    position: sticky;
    top: 0;
  }

  .header-inner {
    height: 64px;
  }

  .brand-logo {
    font-size: 1.2rem;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: #FFFFFF;
    flex-direction: column;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    gap: 0.85rem;
    z-index: 90;
  }

  .main-nav.open {
    display: flex;
    animation: slideDownNav 0.2s ease-out;
  }

  @keyframes slideDownNav {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .nav-link {
    padding: 0.75rem 0;
    font-size: 1rem;
    border-bottom: 1px solid #F1F5F9;
  }

  .nav-cta {
    text-align: center;
    padding: 0.75rem;
    margin-top: 0.5rem;
  }

  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: var(--radius-sm);
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .related-articles-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 600px) {
  /* Reducción de márgenes para maximizar el área útil */
  .container, .container-narrow {
    padding-left: 0.85rem;
    padding-right: 0.85rem;
  }

  .main-content {
    padding-top: 1rem;
    padding-bottom: 2.5rem;
  }

  .card {
    padding: 1.15rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.25rem;
  }

  .card-header {
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
  }

  .hero-banner {
    padding: 1.75rem 0 1.25rem 0;
    margin-bottom: 1.25rem;
  }

  .hero-pill {
    font-size: 0.72rem;
    padding: 0.35rem 0.65rem;
    white-space: normal;
    text-align: center;
  }

  .hero-title {
    font-size: 1.6rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  /* Formulario TDEE */
  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .form-row-3 {
    gap: 0.45rem;
  }

  .radio-chips.cols-3 {
    grid-template-columns: 1fr;
  }

  /* Resultado de la calculadora TDEE */
  .tdee-result-box {
    padding: 1rem;
  }

  .tdee-result-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .tdee-result-val {
    font-size: 1.95rem;
  }

  .tdee-sub-stats {
    flex-direction: row;
    justify-content: space-around;
    padding: 0.55rem 0.65rem;
  }

  .tdee-sub-stat {
    font-size: 0.82rem;
    gap: 0.4rem;
  }

  .tdee-macros-grid {
    gap: 0.4rem;
  }

  .tdee-macro-item {
    padding: 0.5rem 0.2rem;
  }

  .tdee-macro-name {
    font-size: 0.68rem;
  }

  .tdee-macro-qty {
    font-size: 1rem;
  }

  .tdee-macro-pct {
    font-size: 0.65rem;
  }

  /* Rastreador Visual */
  .tracker-hero {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.25rem;
  }

  .tracker-stats {
    width: 100%;
  }

  .gauge-wrapper {
    width: 145px;
    height: 145px;
  }

  .gauge-value {
    font-size: 1.45rem;
  }

  /* Diario Nutricional */
  .add-portion-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    padding: 0.85rem;
  }

  .selected-food-badge {
    text-align: center;
    padding-bottom: 0.35rem;
    border-bottom: 1px dashed var(--color-border);
  }

  .portion-input-row {
    justify-content: center;
  }

  .portion-qty-input {
    width: 80px;
  }

  .quick-weights {
    display: flex;
    justify-content: space-between;
    width: 100%;
    gap: 0.35rem;
  }

  .quick-weights .btn-chip {
    flex: 1;
    min-height: 40px;
    padding: 0.4rem 0.2rem;
    font-size: 0.82rem;
  }

  #add-to-journal-btn {
    width: 100%;
    min-height: 44px;
    font-size: 0.95rem;
  }

  /* Tabla compacta para smartphone */
  .journal-table th, .journal-table td {
    padding: 0.55rem 0.35rem;
    font-size: 0.82rem;
  }

  .food-title {
    font-size: 0.85rem;
  }

  .food-sub {
    font-size: 0.7rem;
  }

  /* Artículos */
  .articles-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .article-card {
    padding: 1.15rem;
  }

  .article-header {
    margin-bottom: 1.25rem;
    padding-bottom: 1rem;
  }

  .callout-box {
    padding: 1rem;
    margin: 1.25rem 0;
  }

  .medical-disclaimer {
    padding: 0.85rem 1rem;
    font-size: 0.82rem;
  }

  /* Banner de Cookies */
  .cookie-banner {
    left: 0.75rem;
    right: 0.75rem;
    bottom: 0.75rem;
    padding: 1rem;
    max-width: none;
  }

  .cookie-actions {
    flex-direction: column;
    width: 100%;
    gap: 0.5rem;
  }

  .cookie-actions button {
    width: 100%;
    min-height: 42px;
  }
}

@media (max-width: 380px) {
  .form-row-3 {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .tdee-sub-stats {
    flex-direction: column;
    gap: 0.25rem;
  }

  .tdee-result-val {
    font-size: 1.75rem;
  }
}

/* 20. Impresión */
@media print {
  .site-header, .site-footer, .cookie-banner, .btn, .search-box-wrapper, .add-portion-bar {
    display: none !important;
  }
  body {
    background: #FFFFFF;
    color: #000000;
  }
  .card {
    box-shadow: none;
    border: 1px solid #CCCCCC;
    page-break-inside: avoid;
  }
}