/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 12px 24px;
  min-width: 120px;
  height: 48px;
  border: none;
  border-radius: var(--radius-full);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

/* Shimmer effect */
.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

/* Button Variants */
.btn-primary {
  background: var(--primary-gradient);
  color: var(--text-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 40px rgba(0, 212, 255, 0.4),
    0 0 30px rgba(0, 212, 255, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--glass-bg);
  border-color: #00d4ff;
  color: #00d4ff;
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* Button Sizes */
.btn-lg {
  padding: 14px 28px;
  height: 54px;
  font-size: 1.0625rem;
  min-width: 140px;
}

.btn-sm {
  padding: 8px 16px;
  height: 38px;
  font-size: var(--font-size-sm);
  min-width: 100px;
}

/* Disabled State */
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn:disabled:hover::before {
  left: -100%;
}