/* ==========================================================
   Amantadina Perú — Estilos principales
   Dominio: amantadinaperu.pe
   ========================================================== */

/* ── Variables de diseño ───────────────────────────────── */
:root {
  /* Paleta de color */
  --color-azul:       #1B6CA8;
  --color-azul-claro: #2E86C1;
  --color-azul-suave: #D4ECF7;
  --color-verde:      #1A8C6F;
  --color-verde-claro:#E8F5F0;
  --color-verde-menta:#D1ECE5;
  --color-fondo:      #FAFCFE;
  --color-marfil:     #F7F9FC;
  --color-blanco:     #FFFFFF;
  --color-gris-texto: #374151;
  --color-gris-suave: #6B7280;
  --color-gris-borde: #E5EBF0;
  --color-alerta:     #92400E;
  --color-alerta-bg:  #FEF3C7;
  --color-naranja:    #D97706;

  /* Tipografía */
  --font-display: 'Lora', Georgia, 'Times New Roman', serif;
  --font-body:    'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-mono:    'Courier New', Courier, monospace;

  /* Espaciado base */
  --sp-xs:  0.5rem;
  --sp-sm:  1rem;
  --sp-md:  1.5rem;
  --sp-lg:  2.5rem;
  --sp-xl:  4rem;
  --sp-xxl: 6rem;

  /* Tipografía escala */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-md:   1.125rem;
  --text-lg:   1.35rem;
  --text-xl:   1.75rem;
  --text-2xl:  2.25rem;
  --text-3xl:  3rem;

  /* Radio de bordes */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  32px;

  /* Sombras */
  --shadow-sm:  0 1px 4px rgba(27,108,168,0.08);
  --shadow-md:  0 4px 16px rgba(27,108,168,0.12);
  --shadow-lg:  0 8px 32px rgba(27,108,168,0.14);
  --shadow-card:0 2px 12px rgba(27,108,168,0.09);

  /* Transición */
  --transition: 0.25s ease;
}

/* ── Reset y base ──────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-gris-texto);
  background-color: var(--color-fondo);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover, a:focus {
  color: var(--color-azul-claro);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-azul);
  outline-offset: 3px;
  border-radius: 3px;
}

ul, ol {
  list-style: none;
}

/* ── Tipografía ────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.25;
  color: var(--color-azul);
  font-weight: 700;
}

h1 { font-size: clamp(1.9rem, 4vw, var(--text-3xl)); }
h2 { font-size: clamp(1.5rem, 3vw, var(--text-2xl)); }
h3 { font-size: clamp(1.15rem, 2.5vw, var(--text-xl)); }
h4 { font-size: var(--text-lg); }

p { margin-bottom: var(--sp-sm); }
p:last-child { margin-bottom: 0; }

/* ── Layout / contenedor ───────────────────────────────── */
.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 var(--sp-md);
}

section {
  padding: var(--sp-xxl) 0;
}

/* Fondo alternado en secciones */
section:nth-child(even) {
  background-color: var(--color-marfil);
}

/* ── Botones ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-xs);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background-color var(--transition), color var(--transition),
              border-color var(--transition), box-shadow var(--transition),
              transform var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid var(--color-azul);
  outline-offset: 3px;
}

.btn-primary {
  background-color: var(--color-azul);
  color: var(--color-blanco);
  border-color: var(--color-azul);
  box-shadow: 0 2px 8px rgba(27,108,168,0.25);
}

.btn-primary:hover {
  background-color: var(--color-azul-claro);
  border-color: var(--color-azul-claro);
  box-shadow: 0 4px 14px rgba(27,108,168,0.35);
  transform: translateY(-1px);
  text-decoration: none;
  color: var(--color-blanco);
}

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

.btn-secondary:hover {
  background-color: var(--color-azul-suave);
  text-decoration: none;
  color: var(--color-azul);
}

.btn-whatsapp {
  background-color: #25D366;
  color: var(--color-blanco);
  border-color: #25D366;
  box-shadow: 0 3px 12px rgba(37,211,102,0.3);
  font-size: var(--text-md);
  padding: 0.9rem 2rem;
}

.btn-whatsapp:hover {
  background-color: #1ebe5a;
  border-color: #1ebe5a;
  box-shadow: 0 5px 18px rgba(37,211,102,0.4);
  transform: translateY(-1px);
  text-decoration: none;
  color: var(--color-blanco);
}

.btn-whatsapp svg,
.btn-primary svg,
.btn-secondary svg {
  flex-shrink: 0;
}

/* ── Encabezado / Navegación ───────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(250, 252, 254, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-gris-borde);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: var(--sp-md);
}

/* Logo tipográfico */
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-mark {
  width: 38px;
  height: 38px;
  background-color: var(--color-azul);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.5px;
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-azul);
  letter-spacing: -0.3px;
}

.logo-sub {
  font-family: var(--font-body);
  font-size: 0.68rem;
  color: var(--color-gris-suave);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* Navegación principal */
.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gris-texto);
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.nav-link:hover {
  background-color: var(--color-azul-suave);
  color: var(--color-azul);
  text-decoration: none;
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-azul);
  outline-offset: 2px;
}

.nav-cta {
  margin-left: var(--sp-sm);
  padding: 0.55rem 1.2rem;
  font-size: var(--text-sm);
}

/* Menú hamburguesa */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--color-gris-texto);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition);
}

.nav-toggle:hover {
  background-color: var(--color-azul-suave);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-azul);
  outline-offset: 2px;
}

/* ── Hero / Sección principal ──────────────────────────── */
.hero {
  padding-top: calc(68px + var(--sp-xl));
  padding-bottom: var(--sp-xl);
  background-color: var(--color-fondo);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: -10%;
  width: 55%;
  height: 100%;
  background: radial-gradient(ellipse at 70% 40%, rgba(212,236,247,0.5) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-xl);
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-azul);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--sp-sm);
}

.eyebrow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-verde);
  flex-shrink: 0;
}

.hero h1 {
  color: var(--color-azul);
  margin-bottom: var(--sp-sm);
  letter-spacing: -0.5px;
}

.hero-lead {
  font-size: var(--text-md);
  color: var(--color-gris-suave);
  max-width: 520px;
  margin-bottom: var(--sp-lg);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-sm);
  margin-bottom: var(--sp-md);
}

.hero-disclaimer {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background-color: var(--color-alerta-bg);
  border-left: 3px solid var(--color-naranja);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  font-size: var(--text-sm);
  color: var(--color-alerta);
  max-width: 520px;
  line-height: 1.5;
}

.hero-disclaimer svg {
  flex-shrink: 0;
  margin-top: 1px;
  color: var(--color-naranja);
}

.hero-image-wrap {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-image-wrap img {
  width: 100%;
  height: 440px;
  object-fit: cover;
  border-radius: var(--radius-xl);
}

/* ── Sección sobre amantadina ──────────────────────────── */
.section-eyebrow {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-azul);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-title {
  margin-bottom: var(--sp-sm);
}

.section-lead {
  font-size: var(--text-md);
  color: var(--color-gris-suave);
  max-width: 680px;
  margin-bottom: var(--sp-lg);
  line-height: 1.75;
}

/* Cuadrícula de tarjetas informativas */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--sp-md);
  margin-bottom: var(--sp-lg);
}

.info-card {
  background-color: var(--color-blanco);
  border: 1px solid var(--color-gris-borde);
  border-radius: var(--radius-md);
  padding: var(--sp-md);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition), transform var(--transition);
}

.info-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--color-azul-suave);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-sm);
  color: var(--color-azul);
}

.card-label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gris-suave);
  margin-bottom: 4px;
}

.card-value {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--color-azul);
  margin-bottom: 4px;
}

.card-note {
  font-size: var(--text-sm);
  color: var(--color-gris-suave);
}

/* Placeholder de fotos del producto */
.product-photos-notice {
  background-color: var(--color-verde-claro);
  border: 1.5px dashed var(--color-verde);
  border-radius: var(--radius-md);
  padding: var(--sp-lg);
  text-align: center;
  color: var(--color-verde);
}

.product-photos-notice h4 {
  color: var(--color-verde);
  margin-bottom: var(--sp-xs);
  font-size: var(--text-md);
}

.product-photos-notice p {
  font-size: var(--text-sm);
  color: var(--color-gris-suave);
  margin-bottom: 0;
}

/* ── Sección disponibilidad / pasos ────────────────────── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--sp-md);
  margin-bottom: var(--sp-md);
  position: relative;
}

.step-card {
  background-color: var(--color-blanco);
  border: 1px solid var(--color-gris-borde);
  border-radius: var(--radius-md);
  padding: var(--sp-md) var(--sp-md) var(--sp-lg);
  box-shadow: var(--shadow-card);
  position: relative;
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition);
}

.step-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-azul);
  color: white;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--sp-sm);
  box-shadow: 0 3px 10px rgba(27,108,168,0.3);
}

.step-card h4 {
  color: var(--color-azul);
  margin-bottom: var(--sp-xs);
  font-size: var(--text-base);
}

.step-card p {
  font-size: var(--text-sm);
  color: var(--color-gris-suave);
  line-height: 1.6;
}

.steps-note {
  background-color: var(--color-marfil);
  border-left: 3px solid var(--color-gris-borde);
  border-radius: var(--radius-sm);
  padding: var(--sp-sm) var(--sp-md);
  font-size: var(--text-sm);
  color: var(--color-gris-suave);
  font-style: italic;
}

/* ── Sección transparencia ─────────────────────────────── */
.transparency-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--sp-sm);
  margin-bottom: var(--sp-lg);
}

.transparency-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: var(--sp-sm) var(--sp-md);
  background-color: var(--color-blanco);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gris-borde);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.transparency-list li svg {
  flex-shrink: 0;
  color: var(--color-verde);
  margin-top: 2px;
}

.medical-warning {
  background-color: var(--color-azul-suave);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-azul);
  padding: var(--sp-md) var(--sp-lg);
  font-size: var(--text-md);
  color: var(--color-azul);
  font-weight: 500;
  line-height: 1.65;
}

/* ── Sección NR ────────────────────────────────────────── */
.nr-hero-quote {
  background: linear-gradient(135deg, var(--color-azul) 0%, var(--color-verde) 100%);
  border-radius: var(--radius-lg);
  padding: var(--sp-lg) var(--sp-xl);
  text-align: center;
  margin-bottom: var(--sp-xl);
  color: white;
  position: relative;
  overflow: hidden;
}

.nr-hero-quote::before {
  content: '"';
  position: absolute;
  top: -20px;
  left: 30px;
  font-size: 180px;
  font-family: var(--font-display);
  color: rgba(255,255,255,0.1);
  line-height: 1;
  pointer-events: none;
}

.nr-hero-quote blockquote {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.2vw, 1.5rem);
  font-style: italic;
  font-weight: 700;
  color: white;
  line-height: 1.4;
  max-width: 720px;
  margin: 0 auto;
}

.nr-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-xl);
  align-items: start;
  margin-bottom: var(--sp-xl);
}

.nr-text p {
  color: var(--color-gris-texto);
  margin-bottom: var(--sp-sm);
}

.nr-image-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.nr-image-wrap img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.nr-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-md);
  margin-bottom: var(--sp-lg);
}

.nr-card {
  background-color: var(--color-blanco);
  border: 1px solid var(--color-gris-borde);
  border-radius: var(--radius-md);
  padding: var(--sp-md);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition), transform var(--transition);
}

.nr-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.nr-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-azul-suave), var(--color-verde-menta));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-sm);
  color: var(--color-azul);
}

.nr-card h4 {
  font-size: var(--text-base);
  color: var(--color-azul);
  margin-bottom: 6px;
}

.nr-card p {
  font-size: var(--text-sm);
  color: var(--color-gris-suave);
  line-height: 1.6;
  margin-bottom: 0;
}

.nr-interest-box {
  background-color: var(--color-marfil);
  border: 1px solid var(--color-gris-borde);
  border-radius: var(--radius-md);
  padding: var(--sp-lg);
  margin-bottom: var(--sp-lg);
}

.nr-interest-box h4 {
  color: var(--color-azul);
  margin-bottom: var(--sp-sm);
  font-size: var(--text-lg);
}

.nr-interest-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--sp-sm);
}

.nr-interest-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: var(--text-sm);
  color: var(--color-gris-texto);
}

.nr-interest-list li::before {
  content: '→';
  color: var(--color-azul);
  flex-shrink: 0;
  font-weight: 700;
}

/* ── Referencias científicas ───────────────────────────── */
.references-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
}

.reference-card {
  background-color: var(--color-blanco);
  border: 1px solid var(--color-gris-borde);
  border-radius: var(--radius-md);
  padding: var(--sp-md) var(--sp-lg);
  box-shadow: var(--shadow-card);
}

.reference-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-xs);
  margin-bottom: var(--sp-xs);
}

.reference-tag {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  background-color: var(--color-azul-suave);
  color: var(--color-azul);
  border-radius: 4px;
  padding: 2px 8px;
}

.reference-card h4 {
  font-size: var(--text-base);
  color: var(--color-azul);
  margin-bottom: 6px;
  font-family: var(--font-display);
}

.reference-authors {
  font-size: var(--text-sm);
  color: var(--color-gris-suave);
  margin-bottom: 4px;
}

.reference-journal {
  font-size: var(--text-sm);
  color: var(--color-gris-texto);
  font-style: italic;
  margin-bottom: var(--sp-xs);
}

.reference-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-azul);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.reference-link:hover {
  color: var(--color-azul-claro);
}

.references-note {
  margin-top: var(--sp-md);
  font-size: var(--text-sm);
  color: var(--color-gris-suave);
  font-style: italic;
  background-color: var(--color-marfil);
  border-radius: var(--radius-sm);
  padding: var(--sp-sm) var(--sp-md);
}

/* ── FAQ ───────────────────────────────────────────────── */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--color-blanco);
  border: 1px solid var(--color-gris-borde);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition);
}

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

.faq-question {
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--sp-md) var(--sp-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--sp-sm);
  text-align: left;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-azul);
  transition: background-color var(--transition);
}

.faq-question:hover {
  background-color: var(--color-azul-suave);
}

.faq-question:focus-visible {
  outline: 2px solid var(--color-azul);
  outline-offset: -2px;
}

.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--color-azul-suave);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-azul);
  transition: transform var(--transition), background-color var(--transition);
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
  background-color: var(--color-azul);
  color: white;
}

.faq-answer {
  display: none;
  padding: 0 var(--sp-lg) var(--sp-md);
  font-size: var(--text-sm);
  color: var(--color-gris-texto);
  line-height: 1.75;
  border-top: 1px solid var(--color-gris-borde);
}

.faq-answer p {
  padding-top: var(--sp-sm);
}

.faq-item.open .faq-answer {
  display: block;
}

/* ── Sección contacto ──────────────────────────────────── */
.contact-section {
  background-image: url('./assets/images/fondo-contacto.svg');
  background-size: cover;
  background-position: center;
  padding: var(--sp-xxl) 0;
}

.contact-section h2,
.contact-section .section-eyebrow {
  color: white;
}

.contact-section p {
  color: rgba(255,255,255,0.85);
}

.contact-card {
  background-color: rgba(255,255,255,0.12);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-xl);
  padding: var(--sp-xl);
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.contact-card h3 {
  color: white;
  margin-bottom: var(--sp-sm);
}

.contact-card p {
  color: rgba(255,255,255,0.85);
  margin-bottom: var(--sp-lg);
}

.contact-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--sp-sm);
  margin-top: var(--sp-lg);
  text-align: left;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background-color: rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: var(--sp-sm) var(--sp-md);
}

.contact-info-item svg {
  color: rgba(255,255,255,0.85);
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-info-item span {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.85);
  line-height: 1.5;
}

.contact-info-item strong {
  display: block;
  color: white;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 2px;
}

/* ── Pie de página ─────────────────────────────────────── */
.site-footer {
  background-color: #0D1F30;
  color: rgba(255,255,255,0.75);
  padding: var(--sp-xl) 0 var(--sp-lg);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--sp-xl);
  padding-bottom: var(--sp-lg);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: var(--sp-lg);
}

.footer-brand .logo-name {
  color: white;
  font-size: 1.1rem;
}

.footer-brand .logo-sub {
  color: rgba(255,255,255,0.55);
}

.footer-brand .logo-mark {
  background-color: var(--color-azul-claro);
}

.footer-brand p {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  margin-top: var(--sp-sm);
  line-height: 1.65;
}

.footer-col h5 {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--sp-sm);
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}

.footer-col a:hover {
  color: white;
  text-decoration: none;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--sp-md);
}

.footer-legal {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.45);
  line-height: 1.7;
  max-width: 660px;
}

.footer-legal p { margin-bottom: 6px; }
.footer-legal p:last-child { margin-bottom: 0; }

.footer-copy {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
  text-align: right;
  flex-shrink: 0;
}

/* ── Página de error ───────────────────────────────────── */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--sp-xl);
  background: linear-gradient(135deg, var(--color-fondo), var(--color-azul-suave));
}

.error-content {
  max-width: 500px;
}

.error-code {
  font-family: var(--font-display);
  font-size: 7rem;
  font-weight: 700;
  color: var(--color-azul);
  line-height: 1;
  margin-bottom: var(--sp-sm);
  opacity: 0.3;
}

/* ── Animaciones de scroll ─────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ── Botón scroll al inicio ────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 900;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background-color: var(--color-azul);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  transform: translateY(-3px);
  background-color: var(--color-azul-claro);
}

.back-to-top:focus-visible {
  outline: 3px solid var(--color-azul);
  outline-offset: 3px;
}

/* ── Utilidades ────────────────────────────────────────── */
.text-center { text-align: center; }
.mb-sm { margin-bottom: var(--sp-sm); }
.mb-md { margin-bottom: var(--sp-md); }
.mb-lg { margin-bottom: var(--sp-lg); }
.mt-md { margin-top: var(--sp-md); }
.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;
}

/* Divisor decorativo */
.section-divider {
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-azul), var(--color-verde));
  border-radius: 2px;
  margin-bottom: var(--sp-sm);
}

/* ── Reduced motion ────────────────────────────────────── */
@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;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 1024px) {
  .nr-grid { grid-template-columns: 1fr; }
  .nr-image-wrap { max-height: 280px; }
  .nr-image-wrap img { height: 280px; }
  .nr-cards { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  :root {
    --sp-xl:  2.5rem;
    --sp-xxl: 4rem;
  }

  /* Header */
  .nav-toggle { display: flex; }

  .site-nav {
    display: none;
    position: fixed;
    top: 68px;
    left: 0;
    width: 100%;
    background-color: var(--color-fondo);
    border-bottom: 1px solid var(--color-gris-borde);
    box-shadow: var(--shadow-md);
    flex-direction: column;
    align-items: stretch;
    padding: var(--sp-sm);
    z-index: 999;
  }

  .site-nav.open {
    display: flex;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    width: 100%;
  }

  .nav-link {
    padding: 0.75rem 1rem;
    font-size: var(--text-base);
    border-radius: var(--radius-sm);
  }

  .nav-cta {
    margin-left: 0;
    margin-top: var(--sp-xs);
    text-align: center;
    justify-content: center;
  }

  /* Hero */
  .hero-grid { grid-template-columns: 1fr; }
  .hero-image-wrap { order: -1; }
  .hero-image-wrap img { height: 280px; }
  .hero-lead { max-width: 100%; }
  .hero-disclaimer { max-width: 100%; }

  /* Grids */
  .cards-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
  .nr-cards { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }

  /* Footer */
  .footer-top { grid-template-columns: 1fr; gap: var(--sp-lg); }
  .footer-bottom { flex-direction: column; }
  .footer-copy { text-align: left; }

  /* NR quote */
  .nr-hero-quote { padding: var(--sp-lg); }

  /* Contacto */
  .contact-card { padding: var(--sp-lg); }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { justify-content: center; }
  .nr-hero-quote::before { display: none; }
  .back-to-top { bottom: 1.25rem; right: 1.25rem; }
}