/*--------------------------------------------------------------
  Buttons — primary / outline / ghost / icon / play
--------------------------------------------------------------*/

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.875rem 1.75rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--fs-small);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--t);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  line-height: 1.2;
}

.btn:focus-visible {
  outline: 3px solid rgba(255, 87, 34, 0.4);
  outline-offset: 2px;
}

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

.btn-primary:hover {
  background: var(--color-primary-hover);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 15px 35px rgba(255, 87, 34, 0.45);
}

.btn-secondary {
  background: var(--color-secondary);
  color: var(--color-white);
}

.btn-secondary:hover {
  background: var(--color-secondary-light);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-heading);
  border-color: var(--color-border-strong);
}

.btn-outline:hover {
  background: var(--color-heading);
  color: var(--color-bg);
  border-color: var(--color-heading);
}

.btn-outline-white {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.4);
}

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

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  padding: 0.5rem 1rem;
}

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

.btn-lg {
  padding: 1.125rem 2.25rem;
  font-size: 1rem;
}

.btn-sm {
  padding: 0.625rem 1.25rem;
  font-size: var(--fs-xs);
}

.btn i {
  transition: transform var(--t);
}

.btn:hover i.arrow {
  transform: translateX(4px);
}

/* Play button */
.btn-play {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: var(--color-white);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  padding-left: 4px;
  border: none;
  cursor: pointer;
  box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.8);
  animation: pulse 2s infinite;
  transition: transform var(--t);
}

.btn-play:hover {
  transform: scale(1.1);
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.6); }
  70% { box-shadow: 0 0 0 20px rgba(255, 255, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); }
}