/* ==========================================================================
   SISA SOLUCIONES INTEGRALES — Reusable Components
   (buttons, brand/logo, navbar, footer, floating whatsapp)
   ========================================================================== */

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem 1.75rem;
  border-radius: 999px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.btn--primary {
  background: var(--gradient-brand);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 16px 32px rgba(0, 82, 180, 0.28);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.12);
  color: var(--color-dark);
  border: 1.5px solid var(--color-border);
  backdrop-filter: blur(6px);
}

.btn--ghost:hover {
  background: var(--color-white);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--color-blue);
  border: 1.5px solid var(--color-blue);
}

.btn--outline:hover {
  background: var(--color-blue);
  color: var(--color-white);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.btn--sm { padding: 0.6rem 1.25rem; font-size: 0.85rem; }
.btn--lg { padding: 1.05rem 2.25rem; font-size: 1.02rem; }
.btn--block { width: 100%; }

/* ==========================================================================
   Logo / Brand
   ========================================================================== */

.brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.brand__logo {
  position: relative;
  width: 52px;
  height: 52px;
  flex-shrink: 0;
}

.brand__grid {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 4px;
}

.brand__cell {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.78rem;
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.brand__cell--s1 { background: var(--color-blue); }
.brand__cell--s2 { background: var(--color-teal); }
.brand__cell--i { background: var(--color-teal-dark); }
.brand__cell--a { background: var(--color-blue-dark); }

.brand__badge {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-teal-dark);
  color: var(--color-white);
  font-size: 0.48rem;
  font-weight: 700;
  letter-spacing: 0.2px;
  border: 2px solid var(--color-white);
  z-index: 2;
}

.brand__caption {
  font-family: var(--font-heading);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--color-dark);
  white-space: nowrap;
}

.brand--footer .brand__caption { color: var(--color-white); }
.brand--footer .brand__badge { border-color: var(--color-dark-soft); }

.brand--lg .brand__logo { width: 68px; height: 68px; }
.brand--lg .brand__cell { font-size: 1rem; }
.brand--lg .brand__badge { width: 22px; height: 22px; font-size: 0.56rem; top: -7px; right: -7px; }
.brand--lg .brand__caption { font-size: 0.74rem; }

/* ==========================================================================
   Navbar
   ========================================================================== */

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(227, 232, 240, 0.7);
  transition: box-shadow var(--transition-fast), background var(--transition-fast);
}

.navbar.is-scrolled {
  box-shadow: 0 6px 24px rgba(6, 18, 38, 0.08);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
  gap: 1.5rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  font-weight: 600;
  font-size: 0.92rem;
}

.nav-links a {
  position: relative;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--gradient-brand);
  transition: width var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-blue);
}

.nav-links a:hover::after { width: 100%; }

.navbar__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-active span:nth-child(2) { opacity: 0; }
.nav-toggle.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  background: linear-gradient(160deg, var(--color-dark) 0%, var(--color-dark-soft) 100%);
  color: rgba(255,255,255,0.85);
  padding: var(--space-2xl) 0 0;
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 3rem;
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer__brand p {
  margin: 1.25rem 0 1.5rem;
  font-size: 0.92rem;
  color: rgba(255,255,255,0.6);
  max-width: 320px;
}

.footer__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: var(--color-white);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.footer__social a:hover {
  background: var(--gradient-brand);
  transform: translateY(-3px);
}

.footer__links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer__links h5 {
  color: var(--color-white);
  font-size: 0.9rem;
  letter-spacing: 0.5px;
  margin-bottom: 1.1rem;
}

.footer__links a {
  display: block;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 0.75rem;
  transition: color var(--transition-fast);
}

.footer__links a:hover { color: var(--color-teal); }

.footer__bottom {
  text-align: center;
  padding: 1.5rem 0;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
}

.footer__credit a {
  color: rgba(255,255,255,0.65);
  font-weight: 600;
  transition: color var(--transition-fast);
}

.footer__credit a:hover { color: var(--color-teal); }

/* ==========================================================================
   Floating WhatsApp
   ========================================================================== */

.whatsapp-float {
  position: fixed;
  bottom: 1.75rem;
  right: 1.75rem;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: #25D366;
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 12px 28px rgba(37, 211, 102, 0.45);
  z-index: 999;
  transition: transform var(--transition-fast);
  animation: pulse 2.4s infinite;
}

.whatsapp-float:hover { transform: scale(1.1); }

@keyframes pulse {
  0% { box-shadow: 0 12px 28px rgba(37, 211, 102, 0.45), 0 0 0 0 rgba(37, 211, 102, 0.5); }
  70% { box-shadow: 0 12px 28px rgba(37, 211, 102, 0.45), 0 0 0 14px rgba(37, 211, 102, 0); }
  100% { box-shadow: 0 12px 28px rgba(37, 211, 102, 0.45), 0 0 0 0 rgba(37, 211, 102, 0); }
}

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

@media (max-width: 1024px) {
  .footer__inner { grid-template-columns: 1fr; }
  .footer__links { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 860px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
    background: var(--color-white);
    padding: 1.5rem 1.5rem 2rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
  }

  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .navbar__actions .btn--primary.btn--sm { display: none; }
  .nav-toggle { display: flex; }
}

@media (max-width: 640px) {
  .brand__logo { width: 42px; height: 42px; }
  .brand__cell { font-size: 0.64rem; }
  .brand__caption { font-size: 0.54rem; letter-spacing: 1.2px; }
  .brand--lg .brand__logo { width: 56px; height: 56px; }
  .brand--lg .brand__caption { font-size: 0.66rem; }
  .footer__links { grid-template-columns: 1fr 1fr; }
  .whatsapp-float { width: 52px; height: 52px; bottom: 1.25rem; right: 1.25rem; }
}