/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: -0.005em;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn svg { width: 16px; height: 16px; }

.btn-primary {
  background: var(--text-dark);
  color: white;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover { background: #1e293b; box-shadow: var(--shadow-lg); }

.btn-gradient {
  background: var(--gradient);
  color: white;
  box-shadow: 0 8px 24px -8px rgba(99,102,241,0.55);
}
.btn-gradient:hover {
  filter: brightness(1.05);
  box-shadow: 0 14px 32px -8px rgba(99,102,241,0.65);
}

.btn-ghost {
  background: white;
  color: var(--text-dark);
  border-color: var(--border-strong);
}
.btn-ghost:hover { background: var(--bg-elev); border-color: var(--primary); }

.btn-soft {
  background: rgba(99,102,241,0.08);
  color: var(--primary);
}
.btn-soft:hover { background: rgba(99,102,241,0.14); }

.btn-sm { padding: 0.5rem 0.95rem; font-size: 0.82rem; }
.btn-lg { padding: 0.95rem 1.75rem; font-size: 1rem; }
.btn-block { width: 100%; }