/* ============================================================================
   COMPONENT STYLES
   Reusable UI pieces — buttons, chips, cards, language toggle, floating WhatsApp.
   ============================================================================ */

/* ---------- Chips (small pill labels) ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  border-radius: 9999px;
  border: 1px solid var(--hairline);
  background: rgba(18,26,46,.6);
  padding: .25rem .75rem;
  font-size: .75rem;
  font-weight: 500;
  color: var(--muted);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  border-radius: 9999px;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: all .3s cubic-bezier(.22,1,.36,1);
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn:active { transform: scale(.98); }

.btn-sm { height: 2.25rem; padding: 0 1rem;     font-size: .875rem; }
.btn-md { height: 2.75rem; padding: 0 1.25rem;  font-size: .875rem; }
.btn-lg { height: 3.5rem;  padding: 0 1.75rem;  font-size: 1rem; }

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: rgba(79,143,255,.6);
  box-shadow: 0 0 40px -5px rgba(79,143,255,.35);
}
.btn-primary:hover {
  background: rgba(79,143,255,.9);
  box-shadow: 0 0 80px -10px rgba(79,143,255,.45);
}

.btn-whatsapp {
  background: #25D366;
  color: #fff;
  border-color: rgba(37,211,102,.6);
  box-shadow: 0 0 30px -5px rgba(37,211,102,.45);
}
.btn-whatsapp:hover { background: #20BD5A; }

.btn-email {
  background: var(--surface-2);
  color: var(--ink);
  border-color: var(--hairline);
}
.btn-email:hover {
  border-color: rgba(79,143,255,.6);
  background: rgba(18,26,46,.8);
}

/* ---------- Card hover effect ---------- */
.card-hover { transition: all .5s cubic-bezier(.22,1,.36,1); }
.card-hover:hover {
  transform: translateY(-4px);
  border-color: rgba(79,143,255,.4);
  box-shadow: 0 0 40px -5px rgba(79,143,255,.35);
}

/* ---------- Language toggle indicator (sliding pill) ---------- */
.lang-indicator {
  position: absolute;
  top: 2px; bottom: 2px;
  width: calc(50% - 2px);
  border-radius: 9999px;
  background: rgba(79,143,255,.2);
  box-shadow: 0 0 40px -5px rgba(79,143,255,.35);
  border: 1px solid rgba(79,143,255,.4);
  transition: left .3s cubic-bezier(.22,1,.36,1);
}
.lang-indicator.en { left: 2px; }
.lang-indicator.es { left: 50%; }

/* ---------- Floating WhatsApp button ---------- */
#fab-whatsapp {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 40;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 9999px;
  background: #25D366;
  color: #fff;
  box-shadow: 0 10px 30px -5px rgba(37,211,102,.55);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .3s cubic-bezier(.22,1,.36,1), opacity .3s;
  opacity: 0;
  pointer-events: none;
}
#fab-whatsapp.visible { opacity: 1; pointer-events: auto; }
#fab-whatsapp:hover { transform: scale(1.05); }
@media (min-width: 640px) {
  #fab-whatsapp { bottom: 1.5rem; right: 1.5rem; width: 4rem; height: 4rem; }
}

/* ---------- Project visual ---------- */
.project-card:hover .project-visual { filter: brightness(1.1); }
.project-visual { transition: filter .5s; }