/* ========================================
   Laboratorios cosito - Estilo principal
   ======================================== */

/* --- Variables --- */
:root {
  --fondo: #f5f7fa;
  --superficie: #ffffff;
  --texto: #1a1a2e;
  --texto-suave: #5a6377;
  --primario: #1a3a5c;
  --acento: #2980b9;
  --borde: #dce1e8;
  --font-stack: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --radius: 6px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --transition: 200ms ease;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-stack);
  color: var(--texto);
  background: var(--fondo);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* --- Container --- */
.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Tipografía --- */
.kicker {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--acento);
  margin-bottom: 12px;
}

h1, h2, h3 {
  font-weight: 700;
  line-height: 1.1;
  color: var(--texto);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; }

.section-title {
  margin-bottom: 16px;
  color: var(--primario);
}

/* --- Botones --- */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--acento);
  transform: translateY(-1px);
}

.btn-primary:focus-visible {
  outline: 3px solid var(--acento);
  outline-offset: 2px;
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--superficie);
  border-bottom: 1px solid var(--borde);
  height: 64px;
  display: flex;
  align-items: center;
}

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

.site-logo img {
  height: 48px;
  width: auto;
}

.nav-list {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--texto-suave);
  transition: color var(--transition);
  padding: 4px 0;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--primario);
}

.nav-link:focus-visible {
  outline: 2px solid var(--acento);
  outline-offset: 4px;
  border-radius: 2px;
}

/* Hamburger */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 32px;
  height: 24px;
  position: relative;
  padding: 0;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--texto);
  border-radius: 2px;
  position: absolute;
  left: 0;
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle span:nth-child(1) { top: 0; }
.menu-toggle span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.menu-toggle span:nth-child(3) { bottom: 0; }

/* --- Hero (Home) --- */
.hero {
  position: relative;
  background: var(--primario);
  padding: 96px 0 80px;
  overflow: hidden;
  min-height: 420px;
  display: flex;
  align-items: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,58,92,0.95) 0%, rgba(41,128,185,0.85) 100%);
}

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

.hero .kicker {
  color: rgba(255,255,255,0.7);
}

.hero-title {
  color: #fff;
  max-width: 700px;
  margin-bottom: 20px;
}

.hero-text {
  color: rgba(255,255,255,0.85);
  font-size: 1.15rem;
  max-width: 520px;
  margin-bottom: 32px;
}

.hero .btn-primary {
  background: #fff;
  color: var(--primario);
}

.hero .btn-primary:hover {
  background: var(--acento);
  color: #fff;
}

/* --- Page Hero (inner pages) --- */
.page-hero {
  background: var(--primario);
  padding: 72px 0 56px;
}

.page-hero .kicker {
  color: rgba(255,255,255,0.7);
}

.page-title {
  color: #fff;
  margin-bottom: 12px;
}

.page-subtitle {
  color: rgba(255,255,255,0.8);
  font-size: 1.1rem;
  max-width: 540px;
}

/* --- Secciones genéricas --- */
.section {
  padding: 72px 0;
}

/* --- Features (Home) --- */
.features {
  background: var(--superficie);
}

.features .kicker,
.features .section-title {
  text-align: center;
}

.features .section-title {
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.feature-card {
  background: var(--fondo);
  border: 1px solid var(--borde);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  background: var(--primario);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-title {
  margin-bottom: 8px;
  color: var(--primario);
}

.feature-text {
  color: var(--texto-suave);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* --- CTA Banner --- */
.cta-banner {
  background: var(--fondo);
  padding: 64px 0;
  text-align: center;
  border-top: 1px solid var(--borde);
  border-bottom: 1px solid var(--borde);
}

.cta-title {
  margin-bottom: 12px;
  color: var(--primario);
}

.cta-text {
  color: var(--texto-suave);
  margin-bottom: 28px;
  font-size: 1.05rem;
}

/* --- About (Nosotros) --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.about-text p {
  color: var(--texto-suave);
  margin-bottom: 16px;
  line-height: 1.7;
}

.about-values {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.value-card {
  background: var(--superficie);
  border: 1px solid var(--borde);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform var(--transition);
}

.value-card:hover {
  transform: translateY(-2px);
}

.value-title {
  color: var(--primario);
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.value-text {
  color: var(--texto-suave);
  font-size: 0.95rem;
}

/* --- Stats --- */
.stats {
  background: var(--primario);
  padding: 56px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  text-align: center;
}

.stat-item {
  color: #fff;
}

.stat-number {
  display: block;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.8;
}

/* --- Servicios --- */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.service-card {
  background: var(--superficie);
  border: 1px solid var(--borde);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.service-icon {
  width: 48px;
  height: 48px;
  background: var(--fondo);
  color: var(--primario);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.service-title {
  margin-bottom: 8px;
  color: var(--primario);
  font-size: 1.1rem;
}

.service-text {
  color: var(--texto-suave);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* --- Contacto --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

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

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: var(--fondo);
  color: var(--primario);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--texto-suave);
  margin-bottom: 4px;
}

.contact-value {
  font-size: 1.05rem;
  color: var(--texto);
  font-weight: 500;
}

a.contact-value:hover {
  color: var(--acento);
}

/* --- Formulario --- */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--texto);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  font-family: var(--font-stack);
  color: var(--texto);
  background: var(--superficie);
  border: 1px solid var(--borde);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--acento);
  box-shadow: 0 0 0 3px rgba(41,128,185,0.15);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form .btn {
  align-self: flex-start;
}

/* --- Footer --- */
.site-footer {
  background: var(--primario);
  color: rgba(255,255,255,0.85);
  padding: 56px 0 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-logo {
  margin-bottom: 12px;
}

.footer-slogan {
  font-size: 0.95rem;
  opacity: 0.75;
  max-width: 260px;
}

.footer-title {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 16px;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
}

.footer-list a:hover {
  color: #fff;
}

.footer-list svg {
  opacity: 0.6;
  min-width: 16px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding: 20px 0;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.6;
}

/* ========================================
   Responsive
   ======================================== */

/* Tablet */
@media (min-width: 720px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: start;
  }

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

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

  .contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }

  .footer-inner {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .hero {
    padding: 112px 0 96px;
    min-height: 480px;
  }

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

/* Mobile */
@media (max-width: 719px) {
  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--superficie);
    border-bottom: 1px solid var(--borde);
    padding: 16px 24px;
    transform: translateY(-110%);
    transition: transform var(--transition);
    z-index: 99;
  }

  .site-nav.is-open {
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    gap: 16px;
  }

  .nav-link {
    font-size: 1.05rem;
  }

  .hero {
    padding: 64px 0 56px;
    min-height: 360px;
  }

  .section {
    padding: 56px 0;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  html { scroll-behavior: auto; }
}