/**
 * buttons.css
 * ──────────────────────────────────────────────
 * Sem bordas. Sem preenchimento sólido por padrão.
 * O peso visual vem do espaço e da tipografia, não de caixas.
 */

.btn-ghost {
  appearance: none;
  background: none;
  border: none;
  color: var(--ink-dim);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
  padding: var(--space-1) var(--space-2);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}

.btn-ghost:hover { color: var(--ink); }
.btn-ghost:active { transform: scale(0.97); }
.btn-ghost:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 6px;
  border-radius: 4px;
}

.btn-primary {
  appearance: none;
  background: var(--accent);
  border: none;
  color: #05060a;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
  padding: 0.95rem 2.4rem;
  border-radius: 100px;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out),
              background var(--dur-base) var(--ease-in-out);
  box-shadow: 0 8px 30px -8px var(--accent-soft);
}

.btn-primary:hover { transform: translateY(-2px); }
.btn-primary:active { transform: translateY(0) scale(0.98); }
.btn-primary:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 4px;
}

.btn-icon {
  appearance: none;
  background: none;
  border: none;
  color: var(--ink-faint);
  width: 2.5rem;
  height: 2.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}

.btn-icon:hover { color: var(--ink); transform: scale(1.08); }
.btn-icon:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 50%;
}

/* Reação em emoji vetorial — cresce ao ser clicada */
.emoji-btn {
  appearance: none;
  background: none;
  border: none;
  padding: var(--space-1);
  cursor: pointer;
  display: inline-flex;
  color: var(--ink-dim);
  transition: transform var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
}

.emoji-btn svg { width: 2.1rem; height: 2.1rem; }

.emoji-btn:hover {
  color: var(--ink);
  transform: translateY(-3px);
}

.emoji-btn.is-selected {
  color: var(--accent);
  animation: emoji-grow var(--dur-base) var(--ease-out);
}

.emoji-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 6px;
  border-radius: 50%;
}

@keyframes emoji-grow {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.55); }
  100% { transform: scale(1.15); }
}