.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--text-small);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  overflow: hidden;
  transition: border-color var(--duration-fast) var(--easing-main);
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--easing-main);
  z-index: -1;
}

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

.btn:hover::before {
  transform: scaleX(1);
}

.btn-accent::before {
  background: var(--color-accent);
}

.btn-accent:hover {
  border-color: var(--color-accent);
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: var(--text-small);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.cta-dot {
  width: 0.5em;
  height: 0.5em;
  background: currentColor;
  border-radius: var(--radius-circle);
  flex-shrink: 0;
}

.cta-arrow {
  display: inline-flex;
  transition: transform var(--duration-fast) var(--easing-main);
}

.cta:hover .cta-arrow {
  transform: translateX(0.25em);
}

.card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-secondary);
  transition: transform var(--duration-normal) var(--easing-main);
}

.card:hover {
  transform: translateY(-4px);
}

.label {
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

.cross {
  position: relative;
  width: var(--text-micro);
  height: var(--text-micro);
}

.cross::before,
.cross::after {
  content: '';
  position: absolute;
  background: currentColor;
}

.cross::before {
  width: 100%;
  height: 1px;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}

.cross::after {
  width: 1px;
  height: 100%;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
}

/* Advanced Cursor */
.cursor-advanced {
  position: fixed;
  top: 0;
  left: 0;
  width: 100px;
  height: 100px;
  pointer-events: none;
  z-index: var(--z-cursor);
  mix-blend-mode: difference;
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  will-change: transform;
}

.cursor-text-svg {
  position: absolute;
  width: 100%;
  height: 100%;
  animation: cursorRotate 20s linear infinite;
}

@keyframes cursorRotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.cursor-view {
  position: absolute;
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--easing-main);
}

/* Magnetic text helper */
.magnetic-char {
  display: inline-block;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.1, 1);
  will-change: transform;
}

/* WhatsApp Button */
.whatsapp-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #25D366;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: calc(var(--z-modal) - 1);
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  text-decoration: none;
  transition: transform var(--duration-fast) var(--easing-main),
              box-shadow var(--duration-fast) var(--easing-main);
  animation: whatsappPulse 2.5s ease-in-out infinite;
}

@media (max-width: 812px) {
  .whatsapp-btn {
    width: 64px;
    height: 64px;
    bottom: 16px;
    right: 16px;
  }
}

.whatsapp-btn:hover {
  transform: scale(1.15);
  box-shadow: 0 6px 30px rgba(37, 211, 102, 0.6);
  animation: none;
}

.whatsapp-icon {
  width: 28px;
  height: 28px;
}

@media (max-width: 812px) {
  .whatsapp-icon {
    width: 32px;
    height: 32px;
  }
}

.whatsapp-tooltip {
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%) translateX(8px);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-micro);
  color: var(--color-text);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast) var(--easing-main),
              transform var(--duration-fast) var(--easing-main);
}

.whatsapp-btn:hover .whatsapp-tooltip {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

@media (max-width: 812px) {
  .whatsapp-tooltip {
    display: none;
  }
}

@keyframes whatsappPulse {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  }
  50% {
    transform: scale(1.1);
    box-shadow: 0 4px 30px rgba(37, 211, 102, 0.6), 0 0 0 8px rgba(37, 211, 102, 0.1);
  }
}

/* Portfolio Carousel Drag State */
.portfolio-carousel.is-dragging {
  scroll-snap-type: none;
  scroll-behavior: auto;
  cursor: grabbing;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .cursor-advanced {
    display: none;
  }
  
  .whatsapp-btn {
    animation: none;
  }
}