/* ==========================================================================
   Buttons — BEM block: .btn
   Variant = --primary / --secondary / --ghost (mimics a React `variant` prop)
   Size    = --sm / --lg (mimics a React `size` prop)
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  height: 44px;
  padding-inline: var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: var(--fs-sm);
  font-weight: 600;
  white-space: nowrap;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    background var(--transition-fast), border-color var(--transition-fast);
}

.btn:active {
  transform: translateY(1px) scale(0.97);
  transition-duration: 80ms;
}

/* --- Primary: solid red gradient, glowing on hover --- */
.btn--primary {
  color: var(--color-white);
  background: linear-gradient(180deg, var(--color-red-light) 0%, var(--color-red) 55%, var(--color-red-dark) 100%);
  box-shadow: 0 4px 16px rgba(227, 0, 27, 0.35);
}

.btn--primary:hover {
  box-shadow: 0 6px 24px rgba(227, 0, 27, 0.5);
  transform: translateY(-1px);
}

.btn--primary:active {
  box-shadow: 0 2px 8px rgba(227, 0, 27, 0.35);
  transform: translateY(1px) scale(0.97);
}

/* --- Secondary: glass button, used for lower-emphasis actions --- */
.btn--secondary {
  color: var(--color-text-primary);
  background: var(--glass-bg);
  border-color: var(--glass-border);
  -webkit-backdrop-filter: blur(var(--glass-blur-sm));
  backdrop-filter: blur(var(--glass-blur-sm));
}

.btn--secondary:hover {
  background: var(--glass-bg-strong);
  border-color: var(--glass-border-strong);
}

/* --- Outline: pill-shaped, monospace label + trailing icon — used where a
   CTA should read as a distinct, code-like affordance rather than another
   soft glass button. --- */
.btn--outline {
  color: var(--color-red);
  background: var(--color-white);
  border-color: var(--color-red);
  border-radius: var(--radius-pill);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  letter-spacing: -0.01em;
}

.btn--outline:hover {
  background: var(--color-red);
  color: var(--color-white);
}

.btn__icon {
  width: 18px;
  height: 18px;
}

/* --- Ghost: text-only, for the lowest-emphasis actions --- */
.btn--ghost {
  color: var(--color-text-secondary);
  background: transparent;
  border-color: transparent;
}

.btn--ghost:hover {
  color: var(--color-text-primary);
}

/* --- Sizes --- */
.btn--sm {
  height: 36px;
  padding-inline: var(--space-4);
  font-size: 0.8125rem;
}

.btn--lg {
  height: 52px;
  padding-inline: var(--space-6);
  font-size: var(--fs-md);
}