/* ============================================
   FRAMEWORK CSS — Sistemas Clima
   Mobile-first. Tokens fluídos. BEM.
   ============================================ */

/* ============================================
   1. TOKENS (CSS Custom Properties)
   ============================================ */
:root {
  /* --- Colores --- */
  --color-primary-900: #0D47A1;
  --color-primary-500: #1976D2;
  --color-secondary-700: #424242;
  --color-secondary-300: #E0E0E0;
  --color-accent-500: #FF9800;
  --color-accent-700: #F57C00;
  --color-success: #4CAF50;
  --color-error: #F44336;
  --color-white: #FFFFFF;
  --color-black: #000000;

  /* --- Tipografía --- */
  --font-headings: 'Poppins', sans-serif;
  --font-body: 'Lato', sans-serif;
  --font-mono: 'Fira Code', monospace;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semi: 600;
  --font-weight-bold: 700;

  --text-xs: clamp(0.75rem, 0.7rem + 0.1vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.15vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.1vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.25vw, 1.25rem);
  --text-xl: clamp(1.5rem, 1rem + 2vw, 2.5rem);
  --text-2xl: clamp(1.75rem, 1.25rem + 2.5vw, 3rem);
  --text-3xl: clamp(2rem, 1.5rem + 3vw, 3.5rem);

  /* --- Espaciado --- */
  --space-xs: clamp(0.25rem, 0.2rem + 0.1vw, 0.5rem);
  --space-sm: clamp(0.5rem, 0.4rem + 0.2vw, 1rem);
  --space-md: clamp(1rem, 0.5rem + 1vw, 1.5rem);
  --space-lg: clamp(1.5rem, 1rem + 1.5vw, 2.5rem);
  --space-xl: clamp(2.5rem, 2rem + 3vw, 4rem);
  --space-2xl: clamp(4rem, 2rem + 10vw, 8rem);

  /* --- Bordes --- */
  --radius-sm: clamp(4px, 0.25rem + 0.1vw, 8px);
  --radius-md: clamp(8px, 0.5rem + 0.5vw, 16px);
  --radius-lg: clamp(12px, 0.75rem + 0.75vw, 24px);
  --radius-full: 9999px;

  /* --- Sombras --- */
  --shadow-sm: 0px 1px clamp(4px, 0.25rem + 0.25vw, 8px) rgba(0,0,0,0.08);
  --shadow-md: 0px 4px clamp(8px, 0.5rem + 0.5vw, 16px) rgba(0,0,0,0.1);
  --shadow-lg: 0px 8px clamp(16px, 1rem + 1vw, 32px) rgba(0,0,0,0.12);
  --shadow-focus: 0 0 0 3px var(--color-primary-500);

  /* --- Transiciones --- */
  --duration-fast: clamp(150ms, 0.1rem + 0.1vw, 250ms);
  --duration-base: clamp(200ms, 0.15rem + 0.15vw, 350ms);
  --duration-slow: clamp(300ms, 0.2rem + 0.3vw, 500ms);
  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);

  /* --- Breakpoints (solo referencia, no variables CSS) --- */
  /* 768px, 1024px, 1280px */
}

/* ============================================
   2. RESET / NORMALIZE BÁSICO
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-secondary-700);
  background-color: var(--color-white);
  min-height: 100vh;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

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

a {
  color: var(--color-primary-500);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

a:hover {
  color: var(--color-primary-900);
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headings);
  font-weight: var(--font-weight-bold);
  line-height: 1.15;
  color: var(--color-primary-900);
  margin-bottom: var(--space-md);
}

p {
  margin-bottom: var(--space-md);
}

/* ============================================
   3. TIPOGRAFÍA BASE
   ============================================ */
h1 { font-size: var(--text-2xl); }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }
h4 { font-size: var(--text-base); font-weight: var(--font-weight-semi); }
h5 { font-size: var(--text-sm); font-weight: var(--font-weight-semi); text-transform: uppercase; letter-spacing: 0.05em; }
h6 { font-size: var(--text-xs); font-weight: var(--font-weight-medium); text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-secondary-700); }

/* ============================================
   4. LAYOUT
   ============================================ */
.container {
  width: 100%;
  max-width: clamp(20rem, 90vw, 1200px);
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 4rem);
}

.container--narrow {
  max-width: clamp(20rem, 70vw, 900px);
}

.container--wide {
  max-width: clamp(20rem, 95vw, 1400px);
}

/* Grids fluidos */
.grid-s {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
  gap: var(--space-md);
}

.grid-m {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.grid-l {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--space-lg);
}

.grid-2-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.grid-3-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

/* Stack / Cluster / Flow */
.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
}

.flow > * + * {
  margin-top: var(--space-md);
}

/* ============================================
   5. COMPONENTES
   ============================================ */

/* --- Botones --- */
.btn { display: inline-flex; }
/* ... resta de botones ... */
.btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background-color: var(--color-accent-500);
  color: var(--color-white);
  border-color: var(--color-accent-500);
}

.btn--primary:hover,
.btn--primary:focus {
  background-color: var(--color-accent-700);
  border-color: var(--color-accent-700);
  color: var(--color-white);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-primary-500);
  border-color: var(--color-primary-500);
}

.btn--secondary:hover,
.btn--secondary:focus {
  background-color: var(--color-primary-500);
  color: var(--color-white);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-secondary-700);
  border-color: transparent;
  padding-inline: var(--space-sm);
  min-height: auto;
}

.btn--ghost:hover,
.btn--ghost:focus {
  color: var(--color-primary-500);
  text-decoration: underline;
}

.btn--sm {
  min-height: clamp(36px, 1.75rem + 0.5vw, 44px);
  padding-inline: clamp(1rem, 0.8rem + 0.5vw, 1.5rem);
  font-size: var(--text-sm);
}

.btn--lg {
  min-height: clamp(56px, 3rem + 1vw, 72px);
  padding-inline: clamp(2rem, 1.5rem + 1.5vw, 3rem);
  font-size: var(--text-lg);
}

/* --- Tarjeta de Servicio --- */
.service-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--duration-base) var(--ease-default),
              box-shadow var(--duration-base) var(--ease-default);
}

.service-card:hover,
.service-card:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.service-card__media {
  height: clamp(180px, 10vw, 240px);
  overflow: hidden;
}

.service-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-default);
}

.service-card:hover .service-card__media img {
  transform: scale(1.05);
}

.service-card__body {
  padding: var(--space-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.service-card__title {
  font-family: var(--font-headings);
  font-weight: var(--font-weight-semi);
  font-size: var(--text-lg);
  color: var(--color-primary-900);
  margin-bottom: var(--space-sm);
}

.service-card__text {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-secondary-700);
  line-height: 1.6;
  margin-bottom: var(--space-md);
  flex: 1;
}

.service-card__cta {
  margin-top: auto;
}

/* --- Testimonio --- */
.testimonial {
  background-color: var(--color-secondary-300);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  position: relative;
}

.testimonial::before {
  content: '\201C';
  position: absolute;
  top: var(--space-sm);
  left: var(--space-md);
  font-family: var(--font-headings);
  font-size: 4rem;
  line-height: 1;
  color: var(--color-primary-500);
  opacity: 0.3;
  pointer-events: none;
}

.testimonial__quote {
  margin-bottom: var(--space-md);
  position: relative;
  z-index: 1;
}

.testimonial__quote p {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-style: italic;
  line-height: 1.6;
  color: var(--color-secondary-700);
  margin-bottom: 0;
}

.testimonial__author {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  position: relative;
  z-index: 1;
}

.testimonial__avatar {
  width: clamp(40px, 3rem + 0.5vw, 56px);
  height: clamp(40px, 3rem + 0.5vw, 56px);
  border-radius: var(--radius-full);
  background-color: var(--color-primary-500);
  flex-shrink: 0;
  overflow: hidden;
}

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

.testimonial__info strong {
  font-family: var(--font-headings);
  font-weight: var(--font-weight-semi);
  font-size: var(--text-sm);
  color: var(--color-primary-900);
  display: block;
}

.testimonial__info span {
  font-size: var(--text-xs);
  color: var(--color-secondary-700);
}

/* Variante testimonial oscuro */
.testimonial--dark {
  background-color: var(--color-primary-900);
}

.testimonial--dark .testimonial__quote p {
  color: var(--color-white);
}

.testimonial--dark .testimonial__info strong {
  color: var(--color-white);
}

.testimonial--dark .testimonial__info span {
  color: var(--color-secondary-300);
}

.testimonial--dark::before {
  color: var(--color-accent-500);
  opacity: 0.6;
}

/* --- Formulario --- */
.form__field {
  margin-bottom: var(--space-md);
}

.form__label {
  display: block;
  font-family: var(--font-body);
  font-weight: var(--font-weight-medium);
  font-size: var(--text-sm);
  color: var(--color-secondary-700);
  margin-bottom: var(--space-xs);
}

.form__input,
.form__textarea {
  width: 100%;
  padding: clamp(0.75rem, 0.5rem + 0.3vw, 1rem);
  border: 1px solid var(--color-secondary-300);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-base);
  background-color: var(--color-white);
  transition: border-color var(--duration-fast) var(--ease-default),
              box-shadow var(--duration-fast) var(--ease-default);
}

.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: var(--shadow-focus);
}

.form__input::placeholder {
  color: var(--color-secondary-300);
}

.form__input--error {
  border-color: var(--color-error);
}

.form__input--success {
  border-color: var(--color-success);
}

.form__textarea {
  min-height: clamp(120px, 10vw, 200px);
  resize: vertical;
}

/* --- Select de formulario --- */
.form__select {
  width: 100%;
  padding: clamp(0.75rem, 0.5rem + 0.3vw, 1rem);
  border: 1px solid var(--color-secondary-300);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-base);
  background-color: var(--color-white);
  color: var(--color-secondary-700);
  transition: border-color var(--duration-fast) var(--ease-default),
              box-shadow var(--duration-fast) var(--ease-default);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M6 9l6 6 6-6'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1rem;
  padding-right: 2.5rem;
}

.form__select:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: var(--shadow-focus);
}

.form__select:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

/* --- Tarjeta de post --- */
.post-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--duration-base) var(--ease-default),
              box-shadow var(--duration-base) var(--ease-default);
}

.post-card:hover,
.post-card:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.post-card__media {
  height: clamp(180px, 10vw, 220px);
  overflow: hidden;
}

.post-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-default);
}

.post-card:hover .post-card__media img {
  transform: scale(1.05);
}

.post-card__body {
  padding: var(--space-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.post-card__title {
  font-family: var(--font-headings);
  font-weight: var(--font-weight-semi);
  font-size: var(--text-lg);
  color: var(--color-primary-900);
  margin-bottom: var(--space-sm);
  text-decoration: none;
  line-height: 1.3;
}

.post-card__title:hover,
.post-card__title:focus {
  color: var(--color-primary-500);
  outline: none;
}

.post-card__meta {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-secondary-700);
  margin-bottom: var(--space-sm);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  align-items: center;
}

.post-card__excerpt {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-secondary-700);
  line-height: 1.6;
  margin-bottom: var(--space-md);
  flex: 1;
}

.post-card__read-more {
  margin-top: auto;
}

/* --- Badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-md);
  font-family: var(--font-body);
  font-weight: var(--font-weight-medium);
  font-size: var(--text-sm);
  border-radius: var(--radius-full);
  background-color: var(--color-primary-500);
  color: var(--color-white);
  white-space: nowrap;
}

.badge--outline {
  background-color: transparent;
  color: var(--color-primary-500);
  border: 1px solid var(--color-primary-500);
}

.badge--sm {
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--text-xs);
}

.badge--lg {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--text-base);
}

/* --- Alert --- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-md);
  border-radius: var(--radius-sm);
  border-left: 4px solid;
  font-family: var(--font-body);
  font-size: var(--text-base);
}

.alert--info {
  background-color: #E3F2FD;
  border-color: var(--color-primary-500);
  color: var(--color-primary-900);
}

.alert--success {
  background-color: #E8F5E9;
  border-color: var(--color-success);
  color: #1B5E20;
}

.alert--warning {
  background-color: #FFF3E0;
  border-color: var(--color-accent-500);
  color: #E65100;
}

.alert--error {
  background-color: #FFEBEE;
  border-color: var(--color-error);
  color: #B71C1C;
}

.alert__icon {
  flex-shrink: 0;
  width: var(--space-md);
  height: var(--space-md);
}

/* --- Sección CTA --- */
.cta-section {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  text-align: center;
}

.cta-section--primary {
  background-color: var(--color-primary-900);
  color: var(--color-white);
}

.cta-section--primary .cta-section__title,
.cta-section--primary .cta-section__text {
  color: var(--color-white);
}

.cta-section--accent {
  background-color: var(--color-accent-500);
  color: var(--color-white);
}

.cta-section--accent .cta-section__title,
.cta-section--accent .cta-section__text {
  color: var(--color-white);
}

.cta-section--image {
  background-color: var(--color-secondary-700);
  background-size: cover;
  background-position: center;
  color: var(--color-white);
  position: relative;
}

.cta-section--image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 0;
}

.cta-section > * {
  position: relative;
  z-index: 1;
}

.cta-section__title {
  font-family: var(--font-headings);
  font-weight: var(--font-weight-bold);
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
}

.cta-section__text {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--space-lg);
  opacity: 0.9;
}

.cta-section .btn {
  margin-inline: var(--space-xs);
}

/* --- Tipos de secciones --- */
.section {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  background-color: var(--color-white);
  color: var(--color-secondary-700);
}

.section--alt {
  background-color: var(--color-secondary-300);
}

.section--dark {
  background-color: var(--color-primary-900);
  color: var(--color-white);
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--color-white);
}

.section--dark-alt {
  background-color: var(--color-secondary-700);
  color: var(--color-white);
}

.section--dark-alt h1,
.section--dark-alt h2,
.section--dark-alt h3,
.section--dark-alt h4 {
  color: var(--color-white);
}

/* --- Navegación --- */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-secondary-300);
  padding-top: var(--space-md);
  padding-bottom: var(--space-md);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.site-header__logo {
  font-family: var(--font-headings);
  font-weight: var(--font-weight-bold);
  font-size: var(--text-lg);
  color: var(--color-primary-900);
  text-decoration: none;
}

.site-header__logo:hover {
  color: var(--color-primary-500);
}

.hamburger {
  display: flex;
  flex-direction: column;
  gap: clamp(4px, 0.25rem + 0.1vw, 6px);
  padding: var(--space-sm);
  background: transparent;
  border: none;
  cursor: pointer;
}

.hamburger__line {
  display: block;
  width: clamp(24px, 1.5rem + 0.5vw, 32px);
  height: 2px;
  background-color: var(--color-primary-900);
  border-radius: 2px;
  transition: transform var(--duration-fast) var(--ease-default),
              opacity var(--duration-fast) var(--ease-default);
}

.site-nav {
  display: none;
  width: 100%;
}

.site-nav:target {
  display: block;
}

.menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding-top: var(--space-md);
}

.menu__link {
  font-family: var(--font-body);
  font-weight: var(--font-weight-medium);
  font-size: var(--text-base);
  color: var(--color-secondary-700);
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast), background-color var(--duration-fast);
}

.menu__link:hover,
.menu__link:focus {
  color: var(--color-primary-500);
  background-color: var(--color-secondary-300);
  outline: none;
}

.menu__link--active {
  color: var(--color-accent-500);
  font-weight: var(--font-weight-semi);
}

/* Breakpoint: menú horizontal en desktop */
@media (min-width: 768px) {
  .site-nav {
    display: block;
    width: auto;
  }

  .menu {
    flex-direction: row;
    padding-top: 0;
    gap: var(--space-sm);
  }

  .menu__link {
    padding: var(--space-xs) var(--space-sm);
  }

  .hamburger {
    display: none;
  }
}

/* --- Skeleton loader --- */
.skeleton {
  background: linear-gradient(90deg, var(--color-secondary-300) 25%, var(--color-white) 50%, var(--color-secondary-300) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

.skeleton--text {
  height: var(--space-md);
  width: 100%;
}

.skeleton--title {
  height: var(--text-lg);
  width: 60%;
  margin-bottom: var(--space-sm);
}

.skeleton--image {
  height: clamp(180px, 10vw, 240px);
  width: 100%;
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --- Empty state --- */
.empty-state {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
}

.empty-state__icon {
  width: clamp(48px, 4rem + 2vw, 80px);
  height: clamp(48px, 4rem + 2vw, 80px);
  margin-bottom: var(--space-lg);
  color: var(--color-secondary-300);
}

.empty-state__title {
  font-family: var(--font-headings);
  font-weight: var(--font-weight-semi);
  font-size: var(--text-xl);
  color: var(--color-primary-900);
  margin-bottom: var(--space-sm);
}

.empty-state__text {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-secondary-700);
  margin-bottom: var(--space-lg);
  max-width: 500px;
  margin-inline: auto;
}

/* --- Iconos --- */
.icon {
  display: inline-block;
  width: var(--space-md);
  height: var(--space-md);
  vertical-align: middle;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon--sm { width: var(--space-sm); height: var(--space-sm); }
.icon--lg { width: var(--space-lg); height: var(--space-lg); }
.icon--xl { width: var(--space-xl); height: var(--space-xl); }

.icon-start {
  margin-right: var(--space-xs);
}

.icon-end {
  margin-left: var(--space-xs);
}

/* ============================================
    7. COMPONENTES ADICIONALES
    ============================================ */

/* --- Bloque de feature (diferenciador) --- */
.feature {
  text-align: center;
  padding: var(--space-lg);
}

.feature__icon {
  width: clamp(48px, 4rem + 1vw, 64px);
  height: clamp(48px, 4rem + 1vw, 64px);
  margin-bottom: var(--space-md);
  margin-inline: auto;
  color: var(--color-accent-500);
}

.feature__title {
  font-family: var(--font-headings);
  font-weight: var(--font-weight-semi);
  font-size: var(--text-lg);
  color: var(--color-primary-900);
  margin-bottom: var(--space-sm);
}

.feature__text {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-secondary-700);
  line-height: 1.6;
  margin-bottom: 0;
}

/* --- Cifra / Stat --- */
.stat {
  text-align: center;
  padding: var(--space-md);
}

.stat__number {
  font-family: var(--font-headings);
  font-weight: var(--font-weight-bold);
  font-size: var(--text-3xl);
  color: var(--color-accent-500);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat__label {
  font-family: var(--font-body);
  font-weight: var(--font-weight-medium);
  font-size: var(--text-base);
  color: var(--color-secondary-300);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Paso de proceso --- */
.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  position: relative;
}

.step__number {
  font-family: var(--font-headings);
  font-weight: var(--font-weight-bold);
  font-size: var(--text-2xl);
  color: var(--color-accent-500);
  line-height: 1;
}

.step__title {
  font-family: var(--font-headings);
  font-weight: var(--font-weight-semi);
  font-size: var(--text-lg);
  color: var(--color-primary-900);
  margin-bottom: 0;
}

.step__text {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-secondary-700);
  line-height: 1.6;
  margin-bottom: 0;
}

/* --- Footer --- */
.site-footer {
  background-color: var(--color-secondary-700);
  color: var(--color-white);
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-lg);
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.site-footer__brand {
  font-family: var(--font-headings);
  font-weight: var(--font-weight-bold);
  font-size: var(--text-lg);
  color: var(--color-white);
  text-decoration: none;
  display: inline-block;
  margin-bottom: var(--space-sm);
}

.site-footer__brand:hover,
.site-footer__brand:focus {
  color: var(--color-accent-500);
  outline: none;
}

.site-footer__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.site-footer__link {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-secondary-300);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.site-footer__link:hover,
.site-footer__link:focus {
  color: var(--color-accent-500);
  outline: none;
}

.site-footer__contact {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-secondary-300);
  line-height: 1.8;
}

.site-footer__contact a {
  color: var(--color-white);
  text-decoration: none;
}

.site-footer__contact a:hover,
.site-footer__contact a:focus {
  color: var(--color-accent-500);
  outline: none;
}

.site-footer__bottom {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255,255,255,0.1);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-secondary-300);
  text-align: center;
}

@media (min-width: 768px) {
  .site-footer__inner {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
  }

  .site-footer__nav {
    flex-direction: row;
    gap: var(--space-lg);
  }

  .site-footer__brand,
  .site-footer__contact {
    flex: 1 1 200px;
    min-width: 200px;
  }
}

/* ============================================
    8. UTILIDADES TRANSVERSALES
    ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }

.w-full { width: 100%; }

.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;
}

.hidden-mobile { display: none; }

@media (min-width: 768px) {
  .hidden-mobile { display: block; }
  .hidden-desktop { display: none; }
}

/* Grid 2 columnas con sidebar en desktop */
@media (min-width: 768px) {
  .grid-2-col {
    grid-template-columns: 2fr 1fr;
  }
}

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* ============================================
   7. ACCESIBILIDAD
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Focus visible para todos los elementos interactivos */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}